EP3383585B1 - Hand-held power tool having at least one machine-side contact element - Google Patents

Hand-held power tool having at least one machine-side contact element Download PDF

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Publication number
EP3383585B1
EP3383585B1 EP16788712.4A EP16788712A EP3383585B1 EP 3383585 B1 EP3383585 B1 EP 3383585B1 EP 16788712 A EP16788712 A EP 16788712A EP 3383585 B1 EP3383585 B1 EP 3383585B1
Authority
EP
European Patent Office
Prior art keywords
hand
power tool
held power
accessory
blocking element
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.)
Active
Application number
EP16788712.4A
Other languages
German (de)
French (fr)
Other versions
EP3383585A1 (en
Inventor
Joachim Schadow
Joern Stock
Florian Esenwein
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP3383585A1 publication Critical patent/EP3383585A1/en
Application granted granted Critical
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B55/00—Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
    • B24B55/04—Protective covers for the grinding wheel
    • B24B55/05—Protective covers for the grinding wheel specially designed for portable grinding machines
    • B24B55/052—Protective covers for the grinding wheel specially designed for portable grinding machines with rotating tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B23/00—Portable grinding machines, e.g. hand-guided; Accessories therefor
    • B24B23/02—Portable grinding machines, e.g. hand-guided; Accessories therefor with rotating grinding tools; Accessories therefor
    • B24B23/022—Spindle-locking devices, e.g. for mounting or removing the tool
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B23/00—Portable grinding machines, e.g. hand-guided; Accessories therefor
    • B24B23/02—Portable grinding machines, e.g. hand-guided; Accessories therefor with rotating grinding tools; Accessories therefor
    • B24B23/028—Angle tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
    • B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
    • B25F5/02—Construction of casings, bodies or handles
    • B25F5/025—Construction of casings, bodies or handles with torque reaction bars for rotary tools
    • B25F5/026—Construction of casings, bodies or handles with torque reaction bars for rotary tools in the form of an auxiliary handle
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/02—Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch
    • H01H3/20—Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch wherein an auxiliary movement thereof, or of an attachment thereto, is necessary before the main movement is possible or effective, e.g. for unlatching, for coupling
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/20—Interlocking, locking, or latching mechanisms
    • H01H9/28—Interlocking, locking, or latching mechanisms for locking switch parts by a key or equivalent removable member
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/54—Mechanisms for coupling or uncoupling operating parts, driving mechanisms, or contacts
    • H01H3/58—Mechanisms for coupling or uncoupling operating parts, driving mechanisms, or contacts using friction, toothed, or other mechanical clutch
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/02—Bases, casings, or covers
    • H01H9/06—Casing of switch constituted by a handle serving a purpose other than the actuation of the switch, e.g. by the handle of a vacuum cleaner

Definitions

  • the invention relates to a hand-held power tool with at least one machine-side contact element.
  • the handheld power tool according to the invention with the features of the independent claim is designed in particular as an angle grinder.
  • the hand-held power tool according to the invention has at least one gear housing part.
  • a safety-relevant accessory has at least one accessory-side contact element.
  • the contact element on the machine side and the contact element on the accessory side can be releasably connected to one another. It can thus be ensured that the safety-relevant accessories are mounted on or on the hand-held power tool.
  • the accessory is designed as an additional handle.
  • the auxiliary handle is advantageously intended to be gripped, in particular, by an operator of the hand-held power tool.
  • the safety in the use of the hand-held power tool can thus advantageously be increased by operating the hand-held power tool with two hands.
  • the accessory is designed as a protective hood.
  • the protective hood is advantageously provided to protect an operator of the hand-held power tool from sparks and/or material particles that are produced during operation of the hand-held power tool and/or from fragments of a window shattered during operation that are thrown outwards with great force.
  • a blocking element is arranged in the transmission housing part, which is intended to block a mechanical element when accessories are not installed, so that the hand-held power tool cannot be switched on. Safe operation of the hand-held power tool can thus advantageously be ensured.
  • the mechanical element is designed as a switching element.
  • the switching element is advantageously arranged in the motor housing part.
  • the blocking element has a stop, so that the switch slide moves against the stop of the blocking element when the accessories are not mounted. This ensures that the handheld power tool is not switched on if the accessories are not installed. This ensures safe operation of the handheld power tool.
  • the mechanical element is designed as a mechanical shaft, in particular as a motor shaft.
  • the mechanical element is designed as an output shaft, in particular as a spindle.
  • the blocking element advantageously has a rotary joint.
  • the blocking element when the accessories are mounted, the blocking element is subjected to a force and is moved about an axis of rotation of the swivel joint.
  • the stop of the blocking element can advantageously be moved in such a way that the slide switch can switch on the hand-held power tool (10).
  • FIG. 1 shows a hand-held power tool 10.
  • the hand-held power tool is an angle grinder, which usually has a gear housing part 12 that accommodates an angle gear.
  • the angle grinder has a motor housing part 18 for accommodating an electromotive drive unit 20 .
  • a machine-side contact element 24 is arranged in the transmission housing part 12, as in figure 2 visible.
  • the contact element 24 is arranged in the hand-held power tool 10 .
  • the machine-side contact element 24 is a thread.
  • the thread 24 is arranged in the transmission housing 12 .
  • the machine-side contact element 24 is arranged in the motor housing part 18 . It is also conceivable for more than one machine-side contact element 24 to be arranged in hand-held power tool 10 .
  • An accessory 26 is intended to be connected to the hand-held power tool 10 .
  • the accessory 26 has an accessory-side contact element 28 .
  • On the accessory side means that the contact element 28 is arranged in the accessory 26 for the hand-held power tool 10 .
  • the accessory 26 is an auxiliary handle 26a for the hand-held power tool 10.
  • the auxiliary handle 26a has a threaded pin 29 as an accessory-side contact element 28, which is screwed into the thread 24 of the transmission housing part 12.
  • the machine-side contact element 24 and the accessory-side contact element 28 can be releasably connected to one another.
  • the accessory 26 for the handheld power tool 10 is, as in figure 3 shown, designed as an additional handle 26a or as a protective hood 26b.
  • the auxiliary handle 26a is intended to be gripped by an operator of the hand-held power tool, so that the hand-held traction machine 10 must be operated with two hands.
  • the task of protective hood 26b is to protect an operator of hand-held power tool 10 during operation of hand-held power tool 10 from sparks and/or material particles that are produced during operation of the hand-held power tool and/or from fragments of a window that has burst during operation being thrown outwards with great force .
  • a blocking element 30 is, as in figure 1 visible, arranged in the transmission housing part 12.
  • a mechanical element 32 is arranged adjacent to the blocking element 30 .
  • the mechanical element 32 is intended to ensure the operation of the hand-held power tool 10 .
  • the blocking element 30 is intended to block the mechanical element 32 when the accessories 26 are not installed, so that the hand-held power tool 10 cannot be put into operation.
  • the mechanical element 32 is in the embodiment in figure 1 a switching element 32.
  • figure 2 shows a detailed view.
  • the switching element 32 is provided to switch on the electromotive drive unit 20 when a switch 34 is actuated.
  • the switching element 32 is in the embodiment figure 2 designed as a slide switch. At not If accessories 26 are mounted, for example if the auxiliary handle 26a is not mounted, the slide switch 32 cannot be moved when the switch 34 is actuated in order to switch on the electromotive drive unit 20, so that the hand-held power tool 10 cannot be switched on.
  • the blocking element 30 is in the embodiment according to figure 1 is designed as a tilting element with a swivel joint 40 . According to the invention, the blocking element 30 has a stop 42 .
  • the slide switch 32 cannot be moved any further in the direction of the transmission housing 12 since it moves against the stop 42 of the blocking element 30 .
  • a force F is applied to the blocking element 30 .
  • the blocking element 30 rotates about an axis of rotation 50 of the rotary joint 40.
  • the stop 42 of the blocking element 30 rotates in a direction R and is no longer an obstacle for the slide switch 32. If the auxiliary handle 26a is installed, the slide switch 32 can accordingly be moved in the direction of the transmission housing 12 and switch on the hand-held power tool 10 .
  • a restoring force ensures that the blocking element 30 returns to its initial position when the additional handle 26a is removed.
  • the restoring force can be generated in that the blocking element 30 is elastically deformable.
  • an additional element (not shown), for example a return spring, is integrated.
  • figure 1 shows two variants in which the assembly of the protective hood 26b is queried.
  • the protective hood 26b has a protective hood collar 60 . If the protective hood 26b and thus the protective hood collar 60 is mounted on the hand-held power tool 10 , the blocking element 30 is actuated, which rotates about its axis of rotation 50 of the rotary joint 40 . By rotating the blocking element 30 about the axis of rotation 50 of the rotary joint 40, the stop 42 of the blocking element 30 rotates in a direction R and is for the Switch slide 32 no longer an obstacle. If the auxiliary handle 26a is installed, the slide switch 32 can accordingly be moved in the direction of the transmission housing 12 and switch on the hand-held power tool 10 .
  • figure 4 shows a further embodiment of a handheld power tool 10 with a blocking element 30 and a mechanical element 32.
  • the mechanical element 32 is in the embodiment in figure 4 a motor shaft 32.
  • the motor shaft 32 is intended to transmit a rotational movement via a gear to an output shaft. If the accessories 26 are not installed, for example if the protective hood 26b is not installed, the motor shaft 32 is blocked so that the hand-held power tool 10 cannot be put into operation.
  • a positive connection is formed between a toothed sleeve 62 and the blocking element 30 .
  • the blocking element 30 is in the embodiment according to figure 4 performed with a swivel joint 40. If the protective hood 26b is mounted, the blocking element 30 is moved about the swivel joint 40, with which the positive connection between the blocking element 30 and the toothed toothed sleeve 62 is eliminated.
  • a restoring force ensures that the blocking element 30 returns to its initial position when the protective hood 26b is removed.
  • the restoring force can be generated in that the blocking element 30 is elastically deformable.
  • an additional element (not shown), for example a return spring, is integrated.
  • figure 5 shows a further embodiment of a handheld power tool 10 with a blocking element 30 and a mechanical element 32.
  • the mechanical element 32 is in the embodiment in figure 5 Output shaft 32, which is designed as a spindle.
  • the blocking element 30 is mounted translationally in a bearing flange 64 . If the protective hood 26b is mounted, the blocking element 30 is subjected to force F and is moved from position B to position A, as in FIG figure 5 apparent. A positive connection to the spindle 32 is thus released.
  • a restoring force ensures that the blocking element 30 returns to its initial position when the protective hood 26b is removed.
  • the restoring force is generated by a restoring spring 66 .
  • the brake can only be released when the accessory 26 is in the installed state.
  • FIG 6 shows a hand-held power tool 10, the accessory 26 being designed as a bail handle 26d or as a suction hood 26c. Combinations of the accessories of the exemplary embodiments in the figures are also conceivable. It is thus conceivable that a hand-held power tool 10 is equipped with a protective cap 26b and a bail handle 26d. It is just as conceivable that a hand-held power tool 10 is equipped with an auxiliary handle 26a and a suction hood 26c.

Description

Die Erfindung betrifft eine Handwerkzeugmaschine mit mindestens einem maschinenseitigem Kontaktelement.The invention relates to a hand-held power tool with at least one machine-side contact element.

Stand der TechnikState of the art

Aus dem Stand der Technik sind schon Handwerkzeugmaschinen nach dem Oberbegriff des unabhängigen Anspruchs bekannt.Hand-held power tools according to the preamble of the independent claim are already known from the prior art.

Offenbarung der ErfindungDisclosure of Invention

Die erfindungsgemäße Handwerkzeugmaschine mit den Merkmalen des unabhängigen Anspruchs ist insbesondere als Winkelschleifer ausgebildet. Bei Handwerkzeugmaschinen dieser Art ist es ein besonderes Bedürfnis, die Sicherheit für einen Bediener der Handwerkzeugmaschine zu erhöhen. Dazu gehört unter anderem eine Überwachung, ob sicherheitsrelevantes Zubehör wie eine Schutzhaube beziehungsweise ein Zusatzhandgriff montiert sind.The handheld power tool according to the invention with the features of the independent claim is designed in particular as an angle grinder. In the case of hand-held power tools of this type, there is a particular need to increase safety for an operator of the hand-held power tool. This includes, among other things, monitoring whether safety-relevant accessories such as a protective hood or an additional handle are installed.

Die erfindungsgemäße Handwerkzeugmaschine weist mindestens ein Getriebegehäuseteil auf. Ein sicherheitsrelevantes Zubehör weist erfindungsgemäß mindestens ein zubehörseitiges Kontaktelement auf. Erfindungsgemäß sind das maschinenseitige Kontaktelement und das zubehörseitige Kontaktelement lösbar miteinander verbindbar. Somit kann sichergestellt werden, dass das sicherheitsrelevante Zubehör auf beziehungsweise an die Handwerkzeugmaschine montiert wird.The hand-held power tool according to the invention has at least one gear housing part. According to the invention, a safety-relevant accessory has at least one accessory-side contact element. According to the invention, the contact element on the machine side and the contact element on the accessory side can be releasably connected to one another. It can thus be ensured that the safety-relevant accessories are mounted on or on the hand-held power tool.

Durch die in den Unteransprüchen angegebenen Merkmale sind vorteilhafte Weiterbildungen der erfindungsgemäßen Befestigungseinheit nach dem Anspruch 1 möglich.Advantageous developments of the fastening unit according to claim 1 according to the invention are possible as a result of the features specified in the dependent claims.

In einer vorteilhaften Ausführungsform ist das Zubehör als Zusatzhandgriff ausgebildet. Der Zusatzhandgriff ist vorteilhafterweise dazu vorgesehen, insbesondere von einem Bediener der Handwerkzeugmaschine umgriffen zu werden. Somit kann vorteilhaft die Sicherheit in der Anwendung der Handwerkzeugmaschine dadurch erhöht werden, indem die Handwerkzeugmaschine mit zwei Händen bedient wird.In an advantageous embodiment, the accessory is designed as an additional handle. The auxiliary handle is advantageously intended to be gripped, in particular, by an operator of the hand-held power tool. The safety in the use of the hand-held power tool can thus advantageously be increased by operating the hand-held power tool with two hands.

In einer weiteren vorteilhaften Ausführungsform ist das Zubehör als Schutzhaube ausgebildet. Die Schutzhaube ist vorteilhafterweise dazu vorgesehen, einen Bediener der Handwerkzeugmaschine im Betrieb der Handwerkzeugmaschine vor Funken und/oder Materialpartikeln, die im Betrieb der Handwerkzeugmaschine entstehen, und/oder vor mit großer Wucht nach außen geschleuderten Bruchstücken einer im Betrieb zerborstenen Scheibe zu schützen.In a further advantageous embodiment, the accessory is designed as a protective hood. The protective hood is advantageously provided to protect an operator of the hand-held power tool from sparks and/or material particles that are produced during operation of the hand-held power tool and/or from fragments of a window shattered during operation that are thrown outwards with great force.

Erfindungsgemäß ist ein Blockierelement im Getriebegehäuseteil angeordnet, das dazu vorgesehen ist, bei nicht montiertem Zubehör ein mechanisches Element zu blockieren, sodass die Handwerkzeugmaschine nicht eingeschaltet werden kann. Somit kann vorteilhaft die sichere Bedienung der Handwerkzeugmaschine gewährleistet werden.According to the invention, a blocking element is arranged in the transmission housing part, which is intended to block a mechanical element when accessories are not installed, so that the hand-held power tool cannot be switched on. Safe operation of the hand-held power tool can thus advantageously be ensured.

In einer vorteilhaften Ausführungsform ist das mechanische Element als Schaltelement ausgeführt.In an advantageous embodiment, the mechanical element is designed as a switching element.

Vorteilhafterweise ist das Schaltelement im Motorgehäuseteil angeordnet. Erfindungsgemäß weist das Blockierelement einen Anschlag auf, sodass sich der Schaltschieber bei nicht montiertem Zubehör gegen den Anschlag des Blockierelements bewegt. Somit wird sichergestellt, dass die Handwerkzeugmaschine bei nicht montiertem Zubehör nicht eingeschaltet wird. Somit wird die sichere Bedienung der Handwerkzeugmaschine gewährleistet.The switching element is advantageously arranged in the motor housing part. According to the invention, the blocking element has a stop, so that the switch slide moves against the stop of the blocking element when the accessories are not mounted. This ensures that the handheld power tool is not switched on if the accessories are not installed. This ensures safe operation of the handheld power tool.

In einer vorteilhaften Ausführungsform ist das mechanische Element als mechanische Welle, insbesondere als Motorwelle ausgeführt.In an advantageous embodiment, the mechanical element is designed as a mechanical shaft, in particular as a motor shaft.

In einer weiteren vorteilhaften Ausführungsform ist das mechanische Element als Abtriebswelle, insbesondere als Spindel ausgeführt ist.In a further advantageous embodiment, the mechanical element is designed as an output shaft, in particular as a spindle.

Vorteilhafterweise weist das Blockierelement ein Drehgelenk auf.The blocking element advantageously has a rotary joint.

Vorteilhafterweise wird bei montiertem Zubehör das Blockierelement mit einer Kraft beaufschlagt und um eine Drehachse des Drehgelenks bewegt. Somit kann vorteilhaft durch Drehen des Blockierelements um die Drehachse des Drehgelenks der Anschlag des Blockierelements derart bewegt werden, dass der Schaltschieber die Handwerkzeugmaschine (10) einschalten kann.Advantageously, when the accessories are mounted, the blocking element is subjected to a force and is moved about an axis of rotation of the swivel joint. Thus, by rotating the blocking element about the axis of rotation of the rotary joint, the stop of the blocking element can advantageously be moved in such a way that the slide switch can switch on the hand-held power tool (10).

Weitere Vorteile und zweckmäßige Ausführungen sind der Figurenbeschreibung und den Zeichnungen zu entnehmen.Further advantages and practical explanations can be found in the description of the figures and the drawings.

Zeichnungendrawings

In den Zeichnungen sind Ausführungsformen einer erfindungsgemäßen Handwerkzeugmaschine gezeigt.In the drawings, embodiments of a hand tool according to the invention are shown.

Es zeigen:

Figur 1
eine Anordnung einer erfindungsgemäßen Handwerkzeugmaschine und eines Kontaktelements in schematischer Darstellung,
Figur 2
ein erster Ausschnitt einer Handwerkzugmaschine und ein erster Ausschnitt eines dazugehörigen Zubehörs in schematischer Darstellung,
Figur 3
zwei Ausführungsform eines Zubehörs der erfindungsgemäßen Handwerkzeugmaschine in schematischer Darstellung,
Figur 4
eine zweite Ausführungsform der erfindungsgemäßen Handwerkzeugmaschine und des Kontaktelements in schematischer Darstellung,
Figur 5
eine dritte Ausführungsform der erfindungsgemäßen Handwerkzeugmaschine und des Kontaktelements in schematischer Darstellung,
Figur 6
eine erfindungsgemäße Handwerkzeugmaschine mit zwei weiteren Ausführungsformen des Zubehörs.
Show it:
figure 1
an arrangement of a hand tool according to the invention and a contact element in a schematic representation,
figure 2
a first section of a manual tractor and a first section of an associated accessory in a schematic representation,
figure 3
two embodiment of an accessory of the hand tool according to the invention in a schematic representation,
figure 4
a second embodiment of the hand tool according to the invention and the contact element in a schematic representation,
figure 5
a third embodiment of the hand tool according to the invention and the contact element in a schematic representation,
figure 6
a hand tool according to the invention with two further embodiments of the accessories.

BeschreibungDescription

Für die in den unterschiedlichen Ausführungsformen vorkommenden gleichen Bauteile werden dieselben Bezugszahlen verwendet.The same reference numbers are used for the same components occurring in the different embodiments.

Figur 1 zeigt eine Handwerkzeugmaschine 10. Bei der Handwerkzeugmaschine handelt es sich um einen Winkelschleifer, der üblicherweise ein Getriebegehäuseteil 12 aufweist, das ein Winkelgetriebe beherbergt. Aus dem Winkelgetriebe ragt eine Arbeitsspindel 14, auf der ein Schleif- und/oder Trennwerkzeug 16 aufgebracht ist. Der Winkelschleifer weist ein Motorgehäuseteil 18 zur Aufnahme einer elektromotorischen Antriebseinheit 20 auf. figure 1 shows a hand-held power tool 10. The hand-held power tool is an angle grinder, which usually has a gear housing part 12 that accommodates an angle gear. A work spindle 14, on which a grinding and/or cutting tool 16 is mounted, protrudes from the bevel gear. The angle grinder has a motor housing part 18 for accommodating an electromotive drive unit 20 .

Im Getriebegehäuseteil 12 ist, wie in Figur 2 ersichtlich, ein maschinenseitiges Kontaktelement 24 angeordnet. Maschinenseitig bedeutet, dass das Kontaktelement 24 in der Handwerkzeugmaschine 10 angeordnet ist. Im Ausführungsbeispiel nach Figur 2 ist das maschinenseitige Kontaktelement 24 ein Gewinde. Im Ausführungsbeispiel ist das Gewinde 24 im Getriebegehäuse 12 angeordnet. Es ist aber auch denkbar, dass das maschinenseitige Kontaktelement 24 im Motorgehäuseteil 18 angeordnet ist. Es ist auch denkbar, dass mehr als ein maschinenseitiges Kontaktelement 24 in der Handwerkzeugmaschine 10 angeordnet sind.In the transmission housing part 12, as in figure 2 visible, a machine-side contact element 24 is arranged. On the machine side means that the contact element 24 is arranged in the hand-held power tool 10 . In the embodiment after figure 2 the machine-side contact element 24 is a thread. In the exemplary embodiment, the thread 24 is arranged in the transmission housing 12 . However, it is also conceivable that the machine-side contact element 24 is arranged in the motor housing part 18 . It is also conceivable for more than one machine-side contact element 24 to be arranged in hand-held power tool 10 .

Ein Zubehör 26 ist dazu vorgesehen, mit der Handwerkzeugmaschine 10 verbunden zu werden. Das Zubehör 26 weist ein zubehörseitiges Kontaktelement 28 auf. Zubehörseitig bedeutet, dass das Kontaktelement 28 im Zubehör 26 für die Handwerkzeugmaschine 10 angeordnet ist. Im Ausführungsbeispiel nach Figur 2 ist das Zubehör 26 ein Zusatzhandgriff 26a für die Handwerkzeugmaschine 10. Der Zusatzhandgriff 26a weist als zubehörseitiges Kontaktelement 28 einen Gewindezapfen 29 auf, welcher in das Gewinde 24 des Getriebegehäuseteils 12 geschraubt wird. In der erfindungsgemäßen Ausführungsform ist das maschinenseitige Kontaktelement 24 und das zubehörseitige Kontaktelement 28 lösbar miteinander verbindbar.An accessory 26 is intended to be connected to the hand-held power tool 10 . The accessory 26 has an accessory-side contact element 28 . On the accessory side means that the contact element 28 is arranged in the accessory 26 for the hand-held power tool 10 . In the embodiment after figure 2 the accessory 26 is an auxiliary handle 26a for the hand-held power tool 10. The auxiliary handle 26a has a threaded pin 29 as an accessory-side contact element 28, which is screwed into the thread 24 of the transmission housing part 12. In the embodiment according to the invention, the machine-side contact element 24 and the accessory-side contact element 28 can be releasably connected to one another.

Das Zubehör 26 für die Handwerkzeugmaschine 10 ist, wie in Figur 3 dargestellt, als Zusatzhandgriff 26a oder als Schutzhaube 26b ausgeführt. Der Zusatzhandgriff 26a ist dazu vorgesehen, von einem Bediener der Handwerkzeugmaschine umgriffen zu werden, sodass die Handwerkzugmaschine 10 mit zwei Händen bedient werden muss.The accessory 26 for the handheld power tool 10 is, as in figure 3 shown, designed as an additional handle 26a or as a protective hood 26b. The auxiliary handle 26a is intended to be gripped by an operator of the hand-held power tool, so that the hand-held traction machine 10 must be operated with two hands.

Die Aufgabe der Schutzhaube 26b ist es, einen Bediener der Handwerkzeugmaschine 10 im Betrieb der Handwerkzeugmaschine 10 vor Funken und/oder Materialpartikeln, die im Betrieb der Handwerkzeugmaschine entstehen, und/oder vor mit großer Wucht nach außen geschleuderten Bruchstücken einer im Betrieb zerborstenen Scheibe zu schützen.The task of protective hood 26b is to protect an operator of hand-held power tool 10 during operation of hand-held power tool 10 from sparks and/or material particles that are produced during operation of the hand-held power tool and/or from fragments of a window that has burst during operation being thrown outwards with great force .

Ein Blockierelement 30 ist, wie in Figur 1 ersichtlich, im Getriebegehäuseteil 12 angeordnet. Ein mechanisches Element 32 ist benachbart zum Blockierelement 30 angeordnet. Das mechanische Element 32 ist dazu vorgesehen, den Betrieb der Handwerkzeugmaschine 10 sicherzustellen. Das Blockierelement 30 ist dazu vorgesehen, bei nicht montiertem Zubehör 26 das mechanische Element 32 zu blockieren, sodass die Handwerkzeugmaschine 10 nicht in Betrieb gehen kann.A blocking element 30 is, as in figure 1 visible, arranged in the transmission housing part 12. A mechanical element 32 is arranged adjacent to the blocking element 30 . The mechanical element 32 is intended to ensure the operation of the hand-held power tool 10 . The blocking element 30 is intended to block the mechanical element 32 when the accessories 26 are not installed, so that the hand-held power tool 10 cannot be put into operation.

Das mechanische Element 32 ist im Ausführungsbeispiel in Figur 1 ein Schaltelement 32. Figur 2 zeigt eine Detailansicht. Das Schaltelement 32 ist dazu vorgesehen, bei Betätigung eines Schalters 34 die elektromotorische Antriebseinheit 20 einzuschalten. Das Schaltelement 32 ist im Ausführungsbeispiel nach Figur 2 als Schaltschieber ausgebildet. Bei nicht montiertem Zubehör 26, beispielsweise bei nicht montierten Zusatzhandgriff 26a kann der Schaltschieber 32 bei Betätigung des Schalters 34 nicht bewegt werden, um die elektromotorische Antriebseinheit 20 einzuschalten, sodass die Handwerkzeugmaschine 10 nicht eingeschaltet werden kann.The mechanical element 32 is in the embodiment in figure 1 a switching element 32. figure 2 shows a detailed view. The switching element 32 is provided to switch on the electromotive drive unit 20 when a switch 34 is actuated. The switching element 32 is in the embodiment figure 2 designed as a slide switch. At not If accessories 26 are mounted, for example if the auxiliary handle 26a is not mounted, the slide switch 32 cannot be moved when the switch 34 is actuated in order to switch on the electromotive drive unit 20, so that the hand-held power tool 10 cannot be switched on.

Das Blockierelement 30 ist im Ausführungsbeispiel nach Figur 1 als ein Kippelement mit Drehgelenk 40 ausgeführt ist. Das Blockierelement 30 weist erfindungsgemäß einen Anschlag 42 auf.The blocking element 30 is in the embodiment according to figure 1 is designed as a tilting element with a swivel joint 40 . According to the invention, the blocking element 30 has a stop 42 .

Bei nicht montiertem Zusatzhandgriff 26a ist der Schaltschieber 32 nicht weiter in Richtung Getriebegehäuse 12 bewegbar, da er sich gegen den Anschlag 42 des Blockierelements 30 bewegt. Wird der Zusatzhandgriff 26a montiert, wird das Blockierelement 30 mit einer Kraft F beaufschlagt. Das Blockierelement 30 dreht sich dabei um eine Drehachse 50 des Drehgelenks 40. Durch Drehen des Blockierelements 30 um die Drehachse 50 des Drehgelenks 40, dreht der Anschlag 42 des Blockierelements 30 in eine Richtung R und ist für den Schaltschieber 32 kein Hindernis mehr. Im Falle des montierten Zusatzhandgriffs 26a kann der Schaltschieber 32 demnach in Richtung Getriebegehäuse 12 bewegt werden und die Handwerkzeugmaschine 10 einschalten.If the additional handle 26a is not installed, the slide switch 32 cannot be moved any further in the direction of the transmission housing 12 since it moves against the stop 42 of the blocking element 30 . If the auxiliary handle 26a is mounted, a force F is applied to the blocking element 30 . The blocking element 30 rotates about an axis of rotation 50 of the rotary joint 40. By rotating the blocking element 30 about the axis of rotation 50 of the rotary joint 40, the stop 42 of the blocking element 30 rotates in a direction R and is no longer an obstacle for the slide switch 32. If the auxiliary handle 26a is installed, the slide switch 32 can accordingly be moved in the direction of the transmission housing 12 and switch on the hand-held power tool 10 .

Eine Rückstellkraft sorgt dafür, dass das Blockierelement 30 bei Demontage des Zusatzhandgriffs 26a wieder in seine Ausgangslage zurückkehrt. Die Rückstellkraft kann dadurch erzeugt werden, dass das Blockierelement 30 elastisch verformbar ist. Es ist aber auch denkbar, dass ein nicht gezeigtes zusätzliches Element, beispielsweise eine Rückstellfeder integriert ist. Weiterhin zeigt Figur 1 zeigt zwei Varianten, in denen die Montage der Schutzhaube 26b abgefragt wird.A restoring force ensures that the blocking element 30 returns to its initial position when the additional handle 26a is removed. The restoring force can be generated in that the blocking element 30 is elastically deformable. However, it is also conceivable that an additional element (not shown), for example a return spring, is integrated. Furthermore shows figure 1 shows two variants in which the assembly of the protective hood 26b is queried.

Die Schutzhaube 26b weist einen Schutzhaubenbund 60 auf. Wird die Schutzhaube 26b und damit der Schutzhaubenbund 60 auf die Handwerkzeugmaschine 10 montiert, wird das Blockierelement 30 betätigt, welches um seine Drehachse 50 des Drehgelenks 40 dreht. Durch Drehen des Blockierelements 30 um die Drehachse 50 des Drehgelenks 40, dreht der Anschlag 42 des Blockierelements 30 in eine Richtung R und ist für den Schaltschieber 32 kein Hindernis mehr. Im Falle des montierten Zusatzhandgriffs 26a kann der Schaltschieber 32 demnach in Richtung Getriebegehäuse 12 bewegt werden und die Handwerkzeugmaschine 10 einschalten.The protective hood 26b has a protective hood collar 60 . If the protective hood 26b and thus the protective hood collar 60 is mounted on the hand-held power tool 10 , the blocking element 30 is actuated, which rotates about its axis of rotation 50 of the rotary joint 40 . By rotating the blocking element 30 about the axis of rotation 50 of the rotary joint 40, the stop 42 of the blocking element 30 rotates in a direction R and is for the Switch slide 32 no longer an obstacle. If the auxiliary handle 26a is installed, the slide switch 32 can accordingly be moved in the direction of the transmission housing 12 and switch on the hand-held power tool 10 .

Figur 4 zeigt eine weitere Ausführungsform einer Handwerkzeugmaschine 10 mit einem Blockierelement 30 und einem mechanischen Element 32. figure 4 shows a further embodiment of a handheld power tool 10 with a blocking element 30 and a mechanical element 32.

Das mechanische Element 32 ist im Ausführungsbeispiel in Figur 4 eine Motorwelle 32. Die Motorwelle 32 ist dazu vorgesehen, eine Rotationsbewegung über ein Getriebe an eine Abtriebswelle weiterzuleiten. Bei nicht montiertem Zubehör 26, beispielsweise bei nicht montierter Schutzhaube 26b ist die Motorwelle 32 blockiert, sodass die Handwerkzeugmaschine 10 nicht in Betrieb gehen kann. Dabei wird zwischen einer verzahnten Hülse 62 und dem Blockierelement 30 ein Formschluss gebildet. Das Blockierelement 30 ist im Ausführungsbeispiel nach Figur 4 mit einem Drehgelenk 40 ausgeführt. Wird die Schutzhaube 26b montiert, wird das Blockierelement 30 um das Drehgelenk 40 bewegt, womit der Formschluss zwischen dem Blockierelement 30 und der verzahnten Zahnhülse 62 aufgehoben wird.The mechanical element 32 is in the embodiment in figure 4 a motor shaft 32. The motor shaft 32 is intended to transmit a rotational movement via a gear to an output shaft. If the accessories 26 are not installed, for example if the protective hood 26b is not installed, the motor shaft 32 is blocked so that the hand-held power tool 10 cannot be put into operation. A positive connection is formed between a toothed sleeve 62 and the blocking element 30 . The blocking element 30 is in the embodiment according to figure 4 performed with a swivel joint 40. If the protective hood 26b is mounted, the blocking element 30 is moved about the swivel joint 40, with which the positive connection between the blocking element 30 and the toothed toothed sleeve 62 is eliminated.

Eine Rückstellkraft sorgt dafür, dass das Blockierelement 30 bei Demontage der Schutzhaube 26b wieder in seine Ausgangslage zurückkehrt. Die Rückstellkraft kann dadurch erzeugt werden, dass das Blockierelement 30 elastisch verformbar ist. Es ist aber auch denkbar, dass ein nicht gezeigtes zusätzliches Element, beispielsweise eine Rückstellfeder integriert ist.A restoring force ensures that the blocking element 30 returns to its initial position when the protective hood 26b is removed. The restoring force can be generated in that the blocking element 30 is elastically deformable. However, it is also conceivable that an additional element (not shown), for example a return spring, is integrated.

Figur 5 zeigt eine weitere Ausführungsform einer Handwerkzeugmaschine 10 mit einem Blockierelement 30 und einem mechanischen Element 32. figure 5 shows a further embodiment of a handheld power tool 10 with a blocking element 30 and a mechanical element 32.

Das mechanische Element 32 ist im Ausführungsbeispiel in Figur 5 Abtriebswelle 32, die als Spindel ausgeführt ist.The mechanical element 32 is in the embodiment in figure 5 Output shaft 32, which is designed as a spindle.

Das Blockierelement 30 wird in einem Lagerflansch 64 translatorische gelagert. Wird die Schutzhaube 26b montiert, wird das Blockierelement 30 mit Kraft F beaufschlagt und von der Position B in die Position A bewegt, wie in Figur 5 ersichtlich. Damit wird ein Formschluss zur Spindel 32 frei gegeben.The blocking element 30 is mounted translationally in a bearing flange 64 . If the protective hood 26b is mounted, the blocking element 30 is subjected to force F and is moved from position B to position A, as in FIG figure 5 apparent. A positive connection to the spindle 32 is thus released.

Eine Rückstellkraft sorgt dafür, dass das Blockierelement 30 bei Demontage der Schutzhaube 26b wieder in seine Ausgangslage zurückkehrt. Die Rückstellkraft wird durch eine Rückstellfeder 66 erzeugt.A restoring force ensures that the blocking element 30 returns to its initial position when the protective hood 26b is removed. The restoring force is generated by a restoring spring 66 .

In den Ausführungsformen nach den Figuren 1, 4 und 5 ist beispielsweise eine Kombination mit einem Spindellock 55 der Handwerkzeugmaschine 10 möglich. So wird der Spindellock freigegeben, wenn das Zubehör 26 montiert ist.In the embodiments according to figures 1 , 4 and 5 For example, a combination with a spindle lock 55 of the handheld power tool 10 is possible. This will release the spindle lock when the accessory 26 is mounted.

Besitzt die Handwerkzeugmaschine 10 ein Bremssystem, ist die Bremse nur im montierten Zustand des Zubehörs 26 lösbar.If the hand-held power tool 10 has a brake system, the brake can only be released when the accessory 26 is in the installed state.

Figur 6 zeigt eine Handwerkzeugmaschine 10, wobei das Zubehör 26 als ein Bügelhandgriff 26d beziehungsweise als eine Absaughaube 26c ausgeführt. Denkbar sind auch Kombinationen des Zubehörs der Ausführungsbeispiele in den Figuren. So ist es denkbar, dass eine Handwerkzeugmaschine 10 mit Schutzhabe 26b und Bügelhandgriff 26d ausgestattet. Genauso gut ist es denkbar, dass eine Handwerkzeugmaschine 10 mit Zusatzhandgriff 26a und Absaughaube 26c ausgestattet ist. figure 6 shows a hand-held power tool 10, the accessory 26 being designed as a bail handle 26d or as a suction hood 26c. Combinations of the accessories of the exemplary embodiments in the figures are also conceivable. It is thus conceivable that a hand-held power tool 10 is equipped with a protective cap 26b and a bail handle 26d. It is just as conceivable that a hand-held power tool 10 is equipped with an auxiliary handle 26a and a suction hood 26c.

Claims (7)

  1. Hand-held power tool (10), in particular angle grinder having a transmission housing part (12), wherein the transmission housing part (12) has at least one machine-side contact element (24), having an accessory (26), wherein the accessory (26) has at least one accessory-side contact element (28), characterized in that, with the accessory (26) fitted on the hand-held power tool (10), the machine-side contact element (24) comes into contact with the accessory-side contact element (28), wherein a blocking element (30) is arranged in the transmission housing part (12), said blocking element (30) being intended to block a mechanical element (32) when the accessory (26) is not fitted, such that the hand-held power tool (10) cannot be switched on, wherein the blocking element (30) has a stop (42), such that the mechanical element (32) moves against the stop (42) of the blocking element (30) when the accessory (26) is not fitted.
  2. Hand-held power tool (10) according to Claim 1, characterized in that the mechanical element (32) is embodied as a switch element (32), in particular as a sliding switch.
  3. Hand-held power tool (10) according to Claim 1, characterized in that the mechanical element (32) is embodied as a mechanical shaft (32), in particular as a motor shaft.
  4. Hand-held power tool (10) according to Claim 1, characterized in that the mechanical element (32) is embodied as an output shaft (32), in particular as a spindle.
  5. Hand-held power tool (10) according to any of the preceding claims, characterized in that the blocking element (30) has a rotary joint (40).
  6. Hand-held power tool (10) according to Claim 5, characterized in that, with the accessory (26a, 26b) fitted, the blocking element (30) is subjected to a force F, wherein the blocking element (30) is moved about an axis of rotation (50) of the rotary joint (40).
  7. Hand-held power tool (10) according to either of Claims 5 and 6, characterized in that, as a result of the blocking element (30) being rotated about the axis of rotation (50) of the rotary joint (40), the stop (42) of the blocking element (30) is moved such that the mechanical element (32) can be moved in the direction of the transmission housing part (12) and switch on the hand-held power tool (10).
EP16788712.4A 2015-12-02 2016-11-02 Hand-held power tool having at least one machine-side contact element Active EP3383585B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015224006.1A DE102015224006A1 (en) 2015-12-02 2015-12-02 Hand tool with at least one machine-side contact element
PCT/EP2016/076374 WO2017092947A1 (en) 2015-12-02 2016-11-02 Hand-held power tool having at least one machine-side contact element

Publications (2)

Publication Number Publication Date
EP3383585A1 EP3383585A1 (en) 2018-10-10
EP3383585B1 true EP3383585B1 (en) 2023-03-29

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US (1) US11260502B2 (en)
EP (1) EP3383585B1 (en)
CN (1) CN108367409B (en)
DE (1) DE102015224006A1 (en)
WO (1) WO2017092947A1 (en)

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DE102015224006A1 (en) 2017-06-08
CN108367409A (en) 2018-08-03
WO2017092947A1 (en) 2017-06-08
EP3383585A1 (en) 2018-10-10
CN108367409B (en) 2021-03-19
US11260502B2 (en) 2022-03-01
US20180326554A1 (en) 2018-11-15

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