EP3845341B1 - Handheld machine tool with finger protection - Google Patents

Handheld machine tool with finger protection Download PDF

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Publication number
EP3845341B1
EP3845341B1 EP20212608.2A EP20212608A EP3845341B1 EP 3845341 B1 EP3845341 B1 EP 3845341B1 EP 20212608 A EP20212608 A EP 20212608A EP 3845341 B1 EP3845341 B1 EP 3845341B1
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EP
European Patent Office
Prior art keywords
heat
hand
housing
protection wing
machine tool
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
EP20212608.2A
Other languages
German (de)
French (fr)
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EP3845341A1 (en
Inventor
Simon Erbele
Christian Lang
Dietmar Saur
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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Publication date
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Publication of EP3845341A1 publication Critical patent/EP3845341A1/en
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Classifications

    • 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
    • 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
    • B25F5/008—Cooling means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B21/00—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose
    • B25B21/02—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose with means for imparting impact to screwdriver blade or nut socket
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B23/00—Details of, or accessories for, spanners, wrenches, screwdrivers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B23/00—Details of, or accessories for, spanners, wrenches, screwdrivers
    • B25B23/16—Handles
    • 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

Definitions

  • the present invention relates to a hand-held power tool, in particular a rotary impact wrench, with a handle, the handle having at least one grip area, and a drive unit which has at least one drive motor and a gear for driving a tool holder, the gear being arranged in a gear housing which comprises a thermally conductive material, and wherein the transmission housing rests at least in sections on an associated connection interface on the handle area.
  • a handheld power tool designed as a rotary impact wrench is known from the prior art.
  • This rotary impact wrench has a drive unit with a drive motor and a gear.
  • the transmission is arranged in a transmission housing which has aluminum and heats up during operation of the rotary impact wrench.
  • US2014/0131059 shows such a machine according to the preamble of claim 1.
  • the invention thus makes it possible to provide a hand-held power tool in which safe and reliable use can be made possible by the at least one heat protection wing.
  • the at least one heat protection wing can prevent a user from being burned on the transmission housing during operation of the hand-held power tool.
  • the at least one heat protection wing offers an increase in the flexural rigidity of the housing, which is advantageous in the event of an impact on the hand-held power tool, e.g. if the hand-held power tool falls down.
  • the handle area is preferably formed by two housing halves which are arranged diametrically opposite one another, with each housing half having a heat protection wing.
  • At least one thermal insulation element is preferably arranged on the transmission housing.
  • a further heat protection measure can thus be provided in a simple and uncomplicated manner.
  • the heat-insulating material and/or the heat-insulating element has plastic, and/or the heat-conducting material has light metal.
  • the handheld power tool 100 for mains-independent power supply is mechanical and Can be electrically connected to a battery pack 190, but can also be operated independently of the mains, for example, as an alternative to this.
  • the gear 120 is preferably designed as a planetary gear.
  • the hand-held power tool 100 is assigned a tool holder 140 for receiving an insert tool, e.g. a screwdriver bit.
  • the drive motor 180 is preferably designed as an electronically commutated motor.
  • the drive motor 180 is preferably designed to drive the tool holder 140 and thus the application tool.
  • the tool holder 140 preferably rotates about an axis of rotation 199.
  • a longitudinal extent 118 of the grip region 115 preferably extends parallel to the axis of rotation 199.
  • the transmission 120 is arranged in a transmission housing 125 .
  • the housing 160 and the transmission housing 125 are preferably associated with the machine housing 105 .
  • the housing 160 and the transmission housing 125 preferably form the machine housing 105 .
  • a connection interface 128 is preferably formed between the housing 160 and the transmission housing 125 .
  • the transmission housing 125 rests at least in sections on the associated connection interface 128 on the handle area 115 .
  • the direction of rotation reversal switch 196 is preferably arranged in the area of the connection interface 128, but at least in the immediate vicinity of this.
  • Gear housing 125 preferably comprises a thermally conductive material.
  • At least one heat protection wing 170 is arranged on the associated connection interface 128 .
  • the at least one heat protection wing 170 preferably has a heat-insulating material.
  • the at least one heat protection wing 170 preferably completely covers a surface of the transmission housing 125 facing the at least one heat protection wing 170 .
  • the heat protection wing 170 is preferably at least approximately perpendicular to the longitudinal extension 118 of the grip area 115 or along a transverse extension (399 in 3 ) of the handle portion 115 is formed.
  • the at least one heat protection wing 170 preferably protrudes beyond the transmission housing 125 perpendicularly to the longitudinal extent 118 or perpendicularly to the axis of rotation 199 of the tool holder 140.
  • the at least one heat protection wing 170 is formed in one piece with the housing 160 .
  • the at least one heat protection blade 170 is preferably arranged in the area of the rotational direction reversing switch 196.
  • the handle area 115 is preferably formed by two housing halves 112 .
  • At least one thermal insulation element 127 is arranged on transmission housing 125 .
  • the thermal insulation element 127 is preferably arranged on the housing 160 .
  • the thermal insulation element 127 is preferably injection-molded onto the housing 160 .
  • a thermally insulating material means a material with a comparatively low thermal conductivity, e.g. Analogous to this, in the context of the present invention, a thermally conductive material is to be understood as a material with a comparatively high thermal conductivity, e.g. light metal.
  • the heat-insulating material and/or the heat-insulating element 127 preferably comprises plastic.
  • the thermally conductive material may include light metal.
  • the thermally conductive material preferably has aluminum and/or magnesium.
  • the hand-held power tool 100 is designed as a rotary impact wrench with an impact mechanism 150 .
  • a protective cap 155 is preferably assigned to the percussion mechanism 150 .
  • the protective cap 155 comprises a thermally insulating material.
  • the present invention is not limited to rotary impact wrenches, but can generally be used in different handheld power tools with and without impact mechanism 150, which have a housing with a heat-conducting material.
  • the at least one heat protection wing 170 is illustratively arranged at a distance A from the rotational direction reversing switch 196 in the direction of the assigned connection interface 128.
  • the distance A is preferably formed in such a way that a finger, in particular an index finger of a user of the hand-held power tool 100, can be arranged between the heat protection wing 170 and the switch 196 for reversing the direction of rotation.
  • distance A is approximately 10mm.
  • the at least one heat protection wing 170 illustratively has a length L in the direction of the axis of rotation 199 of the tool holder 140 or along the longitudinal extension 118 of the grip area 115 .
  • the length L is preferably formed in such a way that a finger, in particular an index finger of a user of the hand-held power tool 100, is shielded from the transmission housing 125 by the heat protection wing 170 at the connection interface 128.
  • the length L is approximately 33mm.
  • the at least one heat protection wing 170 also points perpendicularly to the longitudinal extent 118 of the grip area 115, or along a transverse extent (399 in 3 ) of the grip area 115, illustratively has a width B.
  • the width B is preferably configured in such a way that a direct contact of a finger, in particular an index finger, of a user of the hand-held power tool 100 perpendicular to the longitudinal extension 118 of the grip area 115 to the transmission housing 125 is prevented by the heat protection wing 170 .
  • the width B is preferably approximately 10 mm.
  • the width B of the at least one heat protection wing 170 decreases in the direction of the axis of rotation 199 of the tool holder 140 towards the tool holder 140 .
  • the width B can be reduced as desired, e.g. in the form of a ramp, arc and/or in steps.
  • the reduction preferably has an angle of less than 90°, preferably 45°, as a result of which the stability of the housing 160, in particular of the heat protection wing 170, is increased. Better stability is advantageous in particular if the hand-held power tool 100 falls down, in order to prevent the housing 160 or the heat protection wing 170 from being destroyed.
  • the at least one heat protection wing 170 preferably has a width B that is at least configured such that the gripping area 115 in the area of the connection interface 128 is completely thermally insulated from the transmission housing 125 by the heat protection wing 170. I.e. the at least one heat protection wing 170 protrudes completely beyond the transmission housing 125 along the connection interface 128 due to its width B. Furthermore, the at least one heat protection wing 170 preferably terminates flush, in particular without a gap, on the transmission housing 125.
  • the thermal insulation element 127 is arranged on the housing 160, in particular molded onto it.
  • the thermal insulation element 127 is placed in the longitudinal extent 118 of the grip area 115 on the transmission housing 125 .
  • the thermal insulation element 127 is positioned between two screw flanges 211 , 212 of the transmission housing 125 .
  • the at least one thermal insulation element 127 can be embodied as thermal protection when hand-held power tool 100 is subjected to pressure at an end opposite tool holder 140 .
  • several thermal insulation elements 127 can also be arranged in the area of the transmission housing 125 .
  • the values given above are only exemplary.
  • the values for the length L, the width B, the thickness D and/or the distance A of the heat protection wing 170 can also be larger or smaller.
  • the at least one thermal insulation element 127 can also have dimensions other than those described above.
  • the heat protection wings 170 do not have to be arranged perpendicularly to the longitudinal extension 118 but can also be aligned at a predetermined angle to the longitudinal extension 118 .
  • the predetermined angle is preferably greater than 100° and less than or equal to 120°.
  • the stability of the housing 160, in particular of the heat protection wing 170 can be increased.
  • the illustrative two heat protection wings 170 can also be dimensioned differently and/or formed at different angles to the longitudinal extension 118 .

Description

Stand der TechnikState of the art

Die vorliegende Erfindung betrifft eine Handwerkzeugmaschine, insbesondere einen Drehschlagschrauber, mit einem Handgriff, wobei der Handgriff zumindest einen Griffbereich aufweist, und einer Antriebseinheit, die zumindest einen Antriebsmotor und ein Getriebe zum Antreiben einer Werkzeugaufnahme aufweist, wobei das Getriebe in einem Getriebegehäuse angeordnet ist, das ein wärmeleitendes Material aufweist, und wobei das Getriebegehäuse zumindest abschnittsweise an einer zugeordneten Verbindungsschnittstelle am Griffbereich anliegt. Aus dem Stand der Technik ist eine derartige, als Drehschlagschrauber ausgebildete Handwerkzeugmaschine bekannt. Dieser Drehschlagschrauber weist eine Antriebseinheit mit einem Antriebsmotor und einem Getriebe auf. Dabei ist das Getriebe in einem Getriebegehäuse angeordnet, das Aluminium aufweist und sich im Betrieb des Drehschlagschraubers erwärmt. US2014/0131059 zeigt so eine Maschine nach dem Oberbegriff des Anspruchs 1.The present invention relates to a hand-held power tool, in particular a rotary impact wrench, with a handle, the handle having at least one grip area, and a drive unit which has at least one drive motor and a gear for driving a tool holder, the gear being arranged in a gear housing which comprises a thermally conductive material, and wherein the transmission housing rests at least in sections on an associated connection interface on the handle area. Such a handheld power tool designed as a rotary impact wrench is known from the prior art. This rotary impact wrench has a drive unit with a drive motor and a gear. In this case, the transmission is arranged in a transmission housing which has aluminum and heats up during operation of the rotary impact wrench. US2014/0131059 shows such a machine according to the preamble of claim 1.

Offenbarung der ErfindungDisclosure of Invention

Die Erfindung betrifft eine Handwerkzeugmaschine, insbesondere einen Drehschlagschrauber, mit einem Handgriff, wobei der Handgriff zumindest einen Griffbereich aufweist, und einer Antriebseinheit, die zumindest einen Antriebsmotor und ein Getriebe zum Antreiben einer Werkzeugaufnahme aufweist, wobei das Getriebe in einem Getriebegehäuse angeordnet ist, das ein wärmeleitendes Material aufweist, und wobei das Getriebegehäuse zumindest abschnittsweise an einer zugeordneten Verbindungsschnittstelle am Griffbereich anliegt. An der zugeordneten Verbindungsschnittstelle ist mindestens ein Hitzeschutzflügel angeordnet, der ein wärmeisolierendes Material aufweist und bevorzugt zumindest annähernd senkrecht zu einer Längserstreckung des Griffbereichs ausgebildet ist. Der mindestens eine Hitzeschutzflügel deckt eine dem mindestens einen Hitzeschutzflügel zugewandte Oberfläche des Getriebegehäuses vollständig ab.The invention relates to a hand-held power tool, in particular a rotary impact wrench, with a handle, the handle having at least one grip area, and a drive unit having at least one drive motor and a gear for driving a tool holder, the gear being arranged in a gear housing which has a comprises thermally conductive material, and wherein the transmission housing rests at least in sections on an associated connection interface on the handle area. At least one heat protection wing is arranged on the assigned connection interface, which has a heat-insulating material and is preferably formed at least approximately perpendicularly to a longitudinal extension of the grip area. The at least one heat protection wing completely covers a surface of the transmission housing facing the at least one heat protection wing.

Die Erfindung ermöglicht somit die Bereitstellung einer Handwerkzeugmaschine, bei der durch den mindestens einen Hitzeschutzflügel eine sichere und zuverlässige Anwendung ermöglicht werden kann. Insbesondere kann durch den mindestens einen Hitzeschutzflügel verhindert werden, dass sich während eines Betriebs der Handwerkzeugmaschine ein Benutzer am Getriebegehäuse Verbrennungen zuzieht. Darüber hinaus bietet der mindestens eine Hitzeschutzflügel eine Erhöhung einer Biegesteifigkeit des Gehäuses, die vorzugsweise bei einem Stoß gegen die Handwerkzeugmaschine, z.B. durch ein Herunterfallen der Handwerkzeugmaschine, von Vorteil ist.The invention thus makes it possible to provide a hand-held power tool in which safe and reliable use can be made possible by the at least one heat protection wing. In particular, the at least one heat protection wing can prevent a user from being burned on the transmission housing during operation of the hand-held power tool. In addition, the at least one heat protection wing offers an increase in the flexural rigidity of the housing, which is advantageous in the event of an impact on the hand-held power tool, e.g. if the hand-held power tool falls down.

Bevorzugt ist der mindestens eine Hitzeschutzflügel einstückig mit einem Gehäuse ausgebildet, das den Griffbereich ausbildet, wobei in dem Gehäuse bevorzugt der Antriebsmotor angeordnet ist.The at least one heat protection wing is preferably designed in one piece with a housing that forms the grip area, with the drive motor preferably being arranged in the housing.

Somit kann auf einfache Art und Weise eine Anordnung des mindestens einen Hitzeschutzflügel an der Handwerkzeugmaschine ermöglicht werden, wobei gleichzeitig ein stabiles Gehäuse bereitgestellt werden kann.Thus, an arrangement of the at least one heat protection blade on the handheld power tool can be made possible in a simple manner, with a stable housing being able to be provided at the same time.

Vorzugsweise ist der mindestens eine Hitzeschutzflügel im Bereich eines Drehrichtungsumkehrschalters angeordnet, wobei der mindestens eine Hitzeschutzflügel in Richtung der zugeordneten Verbindungsschnittstelle in einem Abstand von annähernd 10 mm vom Drehrichtungsumkehrschalter beabstandet angeordnet ist.The at least one heat protection wing is preferably arranged in the area of a reversing switch, with the at least one heat protection wing being arranged at a distance of approximately 10 mm from the reversing switch in the direction of the associated connection interface.

Somit kann sicher und zuverlässig eine Hand eines Benutzers, insbesondere ein zwischen dem Drehrichtungsumkehrschalter und dem Getriebegehäuse angeordneter Finger eines Benutzers der Handwerkzeugmaschine, im Betrieb vor einer Verbrennung geschützt werden.A user's hand, in particular a finger of a user of the hand-held power tool arranged between the rotational direction reversing switch and the transmission housing, can thus be protected safely and reliably against burns during operation.

Gemäß einer Ausführungsform weist der mindestens eine Hitzeschutzflügel in Richtung einer Rotationsachse der Werkzeugaufnahme eine Länge von annähernd 33 mm auf.According to one embodiment, the at least one heat protection wing has a length of approximately 33 mm in the direction of a rotation axis of the tool holder.

Somit kann einfach und zuverlässig ein geeigneter Hitzeschutz bereitgestellt werden, der einen Finger eines Benutzers der Handwerkzeugmaschine entlang der Rotationsachse der Werkzeugaufnahme schützen kann.Suitable heat protection can thus be provided easily and reliably, which can protect a finger of a user of the hand-held power tool along the axis of rotation of the tool holder.

Der mindestens eine Hitzeschutzflügel weist bevorzugt zur Wärmeisolation eine Dicke von mindestens 1,5 mm auf.The at least one heat protection wing preferably has a thickness of at least 1.5 mm for thermal insulation.

Somit kann ein leichter und robuster Hitzeschutzflügel zur Abschirmung einer vom Getriebegehäuse ausgestrahlten Wärme bereitgestellt werden kann.Thus, a light and robust heat protection wing can be provided for shielding heat radiated from the transmission housing.

Vorzugsweise weist der mindestens eine Hitzeschutzflügel senkrecht zur Längserstreckung des Griffbereichs eine Breite von annähernd 10 mm auf.The at least one heat protection wing preferably has a width of approximately 10 mm perpendicular to the longitudinal extension of the grip area.

Somit kann auf einfache Art und Weise ein Hitzeschutzflügel bereitgestellt werden, der einen Finger eines Benutzers der Handwerkzeugmaschine gegenüber einer Erhitzung des Getriebegehäuse schützen kann. Des Weiteren kann eine verbesserte Stoßfestigkeit des Gehäuses der Handwerkzeugmaschine erreicht werden.In this way, a heat protection wing can be provided in a simple manner, which can protect a finger of a user of the hand-held power tool against heating of the transmission housing. Furthermore, improved shock resistance of the housing of the handheld power tool can be achieved.

Gemäß einer Ausführungsform verkleinert sich die Breite des mindestens einen Hitzeschutzflügels in Richtung einer Rotationsachse der Werkzeugaufnahme zur Werkzeugaufnahme hin.According to one embodiment, the width of the at least one heat protection wing decreases in the direction of an axis of rotation of the tool holder towards the tool holder.

Somit kann ein sicherer und zuverlässiger Hitzeschutz ermöglicht werden, bei dem ein Abbrechen einer Kante des Hitzeschutzflügels wirksam verhindert werden kann.Safe and reliable heat protection can thus be made possible, in which an edge of the heat protection wing can be effectively prevented from breaking off.

Bevorzugt ist der Griffbereich von zwei Gehäusehälften ausgebildet, die diametral gegenüberliegend zueinander angeordnet sind, wobei jede Gehäusehälfte einen Hitzeschutzflügel aufweist.The handle area is preferably formed by two housing halves which are arranged diametrically opposite one another, with each housing half having a heat protection wing.

Somit kann auf einfache Art und Weise ein geeignetes Gehäuse bereitgestellt werden.A suitable housing can thus be provided in a simple manner.

Vorzugsweise ist am Getriebegehäuse zumindest ein Wärmeisolationselement angeordnet.At least one thermal insulation element is preferably arranged on the transmission housing.

Somit kann einfach und unkompliziert eine weitere Hitzeschutzmaßnahme bereitgestellt werden.A further heat protection measure can thus be provided in a simple and uncomplicated manner.

Gemäß einer Ausführungsform weist das wärmeisolierende Material und/oder das Wärmeisolationselement Kunststoff auf, und/oder das wärmeleitende Material weist Leichtmetall auf.According to one embodiment, the heat-insulating material and/or the heat-insulating element has plastic, and/or the heat-conducting material has light metal.

Somit kann ein geeignetes wärmeisolierendes Material bereitgestellt werden.Thus, an appropriate heat insulating material can be provided.

Kurze Beschreibung der ZeichnungenBrief description of the drawings

Die Erfindung ist anhand von in den Zeichnungen dargestellten Ausführungsbeispielen in der nachfolgenden Beschreibung näher erläutert. Es zeigen:

Fig. 1
eine Seitenansicht einer Handwerkzeugmaschine mit einem Hitzeschutzflügel,
Fig. 2
eine perspektivische Draufsicht auf die Handwerkzeugmaschine von Fig. 1, und
Fig. 3
eine perspektivische Vorderansicht der Handwerkzeugmaschine von Fig. 1 und Fig. 2.
The invention is explained in more detail in the following description on the basis of exemplary embodiments illustrated in the drawings. Show it:
1
a side view of a hand tool with a heat protection blade,
2
a perspective top view of the hand tool from 1 , and
3
a perspective front view of the hand tool from 1 and 2 .

Beschreibung der AusführungsbeispieleDescription of the exemplary embodiments

In den Figuren werden Elemente mit gleicher oder vergleichbarer Funktion mit identischen Bezugszeichen versehen und nur einmal genauer beschrieben.In the figures, elements with the same or comparable function are provided with identical reference symbols and are described in more detail only once.

Fig. 1 zeigt eine beispielhafte Handwerkzeugmaschine 100, die illustrativ ein Maschinengehäuse 105 mit einem Handgriff aufweist. Der Handgriff weist zumindest einen Griffbereich 115 auf. Gemäß einer Ausführungsform ist die Handwerkzeugmaschine 100 zur netzunabhängigen Stromversorgung mechanisch und elektrisch mit einem Akkupack 190 verbindbar, kann alternativ hierzu z.B. aber auch netzabhängig betreibbar sein. 1 shows an exemplary hand tool 100, which illustratively has a machine housing 105 with a handle. The handle has at least one grip area 115 . According to one embodiment, the handheld power tool 100 for mains-independent power supply is mechanical and Can be electrically connected to a battery pack 190, but can also be operated independently of the mains, for example, as an alternative to this.

Im Maschinengehäuse 105 ist bevorzugt eine Antriebseinheit 110 mit zumindest einem Getriebe 120, sowie einem vorzugsweise von dem Akkupack 190 mit Strom versorgten, elektrischen Antriebsmotor 180 angeordnet. Das Getriebe 120 ist vorzugsweise als Planetengetriebe ausgebildet. Der Handwerkzeugmaschine 100 ist eine Werkzeugaufnahme 140 zur Aufnahme eines Einsatzwerkzeugs, z.B. eines Schrauberbits, zugeordnet.A drive unit 110 with at least one transmission 120 and an electric drive motor 180, which is preferably supplied with power by the battery pack 190, is preferably arranged in the machine housing 105. The gear 120 is preferably designed as a planetary gear. The hand-held power tool 100 is assigned a tool holder 140 for receiving an insert tool, e.g. a screwdriver bit.

Bevorzugt ist der Antriebsmotor 180 als elektronisch kommutierter Motor ausgebildet. Der Antriebsmotor 180 ist vorzugsweise zum Antrieb der Werkzeugaufnahme 140 und somit des Einsatzwerkzeugs ausgebildet. Die Werkzeugaufnahme 140 rotiert im Betrieb vorzugsweise um eine Drehachse 199. Parallel zur Drehachse 199 erstreckt sich bevorzugt eine Längserstreckung 118 des Griffbereichs 115.The drive motor 180 is preferably designed as an electronically commutated motor. The drive motor 180 is preferably designed to drive the tool holder 140 and thus the application tool. During operation, the tool holder 140 preferably rotates about an axis of rotation 199. A longitudinal extent 118 of the grip region 115 preferably extends parallel to the axis of rotation 199.

Vorzugsweise ist der Antriebsmotor 180 über einen Handschalter 195 ein- und ausschaltbar. Bevorzugt ist der Handschalter 195 am Griffbereich 115 angeordnet. Darüber hinaus ist der Antriebsmotor 180 in einem Gehäuse 160 angeordnet. Vorzugsweise ist dem Gehäuse 160 der Griffbereich 115 zugeordnet.The drive motor 180 can preferably be switched on and off via a manual switch 195 . The manual switch 195 is preferably arranged on the handle area 115 . In addition, the drive motor 180 is arranged in a housing 160 . The handle area 115 is preferably assigned to the housing 160 .

Eine Drehrichtung des Antriebsmotors 180 ist vorzugsweise über einen Drehrichtungsumkehrschalter 196 einstellbar. Analog zum Handschalter 195 ist bevorzugt auch der Drehrichtungsumkehrschalter 196 am Griffbereich 115 angeordnet. Vorzugsweise ist der Drehrichtungsumkehrschalter 196 als Drückschalter ausgebildet, bei dem durch ein Beaufschlagen senkrecht zur Längserstreckung 118 eine Drehrichtung der Werkzeugaufnahme 140 einstellbar ist. Es wird jedoch darauf hingewiesen, dass der Drehrichtungsumkehrschalter 196 auch als elektrischer Taster und/oder Schwenkschalter ausgebildet sein kann.A direction of rotation of the drive motor 180 can preferably be set via a direction of rotation reversal switch 196 . Analogous to the manual switch 195, the switch 196 for reversing the direction of rotation is preferably also arranged on the handle area 115. The direction of rotation reversal switch 196 is preferably designed as a push button switch, in which a direction of rotation of the tool holder 140 can be set by applying pressure perpendicularly to the longitudinal extension 118 . However, it is pointed out that the switch 196 for reversing the direction of rotation can also be in the form of an electric button and/or rotary switch.

Gemäß einer Ausführungsform ist das Getriebe 120 in einem Getriebegehäuse 125 angeordnet. Vorzugsweise sind das Gehäuse 160 und das Getriebegehäuse 125 dem Maschinengehäuse 105 zugeordnet. Bevorzugt bilden das Gehäuse 160 und das Getriebegehäuse 125 das Maschinengehäuse 105 aus. Zwischen dem Gehäuse 160 und dem Getriebegehäuse 125 ist vorzugsweise eine Verbindungsschnittstelle 128 ausgebildet. Darüber hinaus liegt das Getriebegehäuse 125 zumindest abschnittsweise an der zugeordneten Verbindungsschnittstelle 128 am Griffbereich 115 an. Des Weiteren ist der Drehrichtungsumkehrschalter 196 vorzugsweise im Bereich der Verbindungsschnittstelle 128, zumindest aber in unmittelbarer Nähe hierzu, angeordnet. Vorzugsweise weist das Getriebegehäuse 125 ein wärmeleitendes Material auf.According to one embodiment, the transmission 120 is arranged in a transmission housing 125 . The housing 160 and the transmission housing 125 are preferably associated with the machine housing 105 . The housing 160 and the transmission housing 125 preferably form the machine housing 105 . In between A connection interface 128 is preferably formed between the housing 160 and the transmission housing 125 . In addition, the transmission housing 125 rests at least in sections on the associated connection interface 128 on the handle area 115 . Furthermore, the direction of rotation reversal switch 196 is preferably arranged in the area of the connection interface 128, but at least in the immediate vicinity of this. Gear housing 125 preferably comprises a thermally conductive material.

An der zugeordneten Verbindungsschnittstelle 128 ist mindestens ein Hitzeschutzflügel 170 angeordnet. Der mindestens eine Hitzeschutzflügel 170 weist vorzugsweise ein wärmeisolierendes Material auf. Dabei deckt der mindestens eine Hitzeschutzflügel 170 bevorzugt eine dem mindestens einen Hitzeschutzflügel 170 zugewandte Oberfläche des Getriebegehäuses 125 vollständig ab.At least one heat protection wing 170 is arranged on the associated connection interface 128 . The at least one heat protection wing 170 preferably has a heat-insulating material. The at least one heat protection wing 170 preferably completely covers a surface of the transmission housing 125 facing the at least one heat protection wing 170 .

Vorzugsweise ist der Hitzeschutzflügel 170 zumindest annähernd senkrecht zur Längserstreckung 118 des Griffbereichs 115 bzw. entlang einer Quererstreckung (399 in Fig. 3) des Griffbereichs 115 ausgebildet. Bevorzugt überragt der mindestens eine Hitzeschutzflügel 170 das Getriebegehäuse 125 senkrecht zur Längserstreckung 118 bzw. senkrecht zur Drehachse 199 der Werkzeugaufnahme 140.The heat protection wing 170 is preferably at least approximately perpendicular to the longitudinal extension 118 of the grip area 115 or along a transverse extension (399 in 3 ) of the handle portion 115 is formed. The at least one heat protection wing 170 preferably protrudes beyond the transmission housing 125 perpendicularly to the longitudinal extent 118 or perpendicularly to the axis of rotation 199 of the tool holder 140.

Gemäß einer Ausführungsform ist der mindestens eine Hitzeschutzflügel 170 einstückig mit dem Gehäuse 160 ausgebildet. Bevorzugt ist der mindestens eine Hitzeschutzflügel 170 im Bereich des Drehrichtungsumkehrschalters 196 angeordnet.According to one embodiment, the at least one heat protection wing 170 is formed in one piece with the housing 160 . The at least one heat protection blade 170 is preferably arranged in the area of the rotational direction reversing switch 196.

Vorzugsweise ist der Griffbereich 115 von zwei Gehäusehälften 112 ausgebildet.The handle area 115 is preferably formed by two housing halves 112 .

Bevorzugt sind die zwei Gehäusehälften 112 diametral gegenüberliegend zueinander angeordnet. Vorzugsweise weist jede Gehäusehälfte 112 einen Hitzeschutzflügel 170 auf.The two housing halves 112 are preferably arranged diametrically opposite one another. Preferably, each housing half 112 includes a heat shield wing 170 .

Gemäß einer Ausführungsform ist am Getriebegehäuse 125 zumindest ein Wärmeisolationselement 127 angeordnet. Bevorzugt ist das Wärmeisolationselement 127 an dem Gehäuse 160 angeordnet. Dabei ist das Wärmeisolationselement 127 vorzugsweise an das Gehäuse 160 angespritzt.According to one specific embodiment, at least one thermal insulation element 127 is arranged on transmission housing 125 . The thermal insulation element 127 is preferably arranged on the housing 160 . In this case, the thermal insulation element 127 is preferably injection-molded onto the housing 160 .

Im Kontext der vorliegenden Erfindung ist unter einem wärmeisolierenden Material ein Material mit einer vergleichsweise niedrigen Wärmeleitfähigkeit zu verstehen, z.B. Kunststoff. Analog hierzu ist im Kontext der vorliegenden Erfindung unter einem wärmeleitenden Material ein Material mit einer vergleichsweise hohen Wärmeleitfähigkeit zu verstehen, z.B. Leichtmetall. Bevorzugt weist das wärmeisolierende Material und/oder das Wärmeisolationselement 127 Kunststoff auf. Das wärmeleitende Material kann Leichtmetall aufweisen. Bevorzugt weist das wärmeleitende Material Aluminium und/oder Magnesium auf.In the context of the present invention, a thermally insulating material means a material with a comparatively low thermal conductivity, e.g. Analogous to this, in the context of the present invention, a thermally conductive material is to be understood as a material with a comparatively high thermal conductivity, e.g. light metal. The heat-insulating material and/or the heat-insulating element 127 preferably comprises plastic. The thermally conductive material may include light metal. The thermally conductive material preferably has aluminum and/or magnesium.

Beispielhaft ist die Handwerkzeugmaschine 100 als Drehschlagschrauber mit einem Schlagwerk 150 ausgebildet. Dem Schlagwerk 150 ist vorzugsweise eine Schutzkappe 155 zugeordnet. Gemäß einer Ausführungsform weist die Schutzkappe 155 ein wärmeisolierendes Material auf. Es wird jedoch darauf hingewiesen, dass die vorliegende Erfindung nicht auf Drehschlagschrauber beschränkt ist, sondern generell bei unterschiedlichen Handwerkzeugmaschinen mit und ohne dem Schlagwerk 150 Anwendung finden kann, die ein Gehäuse mit einem wärmeleitenden Material aufweisen.By way of example, the hand-held power tool 100 is designed as a rotary impact wrench with an impact mechanism 150 . A protective cap 155 is preferably assigned to the percussion mechanism 150 . According to one embodiment, the protective cap 155 comprises a thermally insulating material. However, it is pointed out that the present invention is not limited to rotary impact wrenches, but can generally be used in different handheld power tools with and without impact mechanism 150, which have a housing with a heat-conducting material.

Fig. 2 zeigt die Handwerkzeugmaschine 100 von Fig. 1 und verdeutlicht den mindestens einen Hitzeschutzflügel 170. Dabei ist der mindestens eine Hitzeschutzflügel 170 in Richtung der zugeordneten Verbindungsschnittstelle 128 illustrativ in einem Abstand A vom Drehrichtungsumkehrschalter 196 beabstandet angeordnet. Bevorzugt ist der Abstand A derart ausgebildet, dass ein Finger, insbesondere ein Zeigefinger eines Benutzers der Handwerkzeugmaschine 100, zwischen dem Hitzeschutzflügel 170 und dem Drehrichtungsumkehrschalter 196 angeordnet werden kann. Vorzugsweise ist der Abstand A annähernd 10 mm. 2 shows the handheld power tool 100 from FIG 1 and illustrates the at least one heat protection wing 170. The at least one heat protection wing 170 is illustratively arranged at a distance A from the rotational direction reversing switch 196 in the direction of the assigned connection interface 128. The distance A is preferably formed in such a way that a finger, in particular an index finger of a user of the hand-held power tool 100, can be arranged between the heat protection wing 170 and the switch 196 for reversing the direction of rotation. Preferably distance A is approximately 10mm.

Des Weiteren weist der mindestens eine Hitzeschutzflügel 170 in Richtung der Rotationsachse 199 der Werkzeugaufnahme 140, bzw. entlang der Längserstreckung 118 des Griffbereichs 115, illustrativ eine Länge L auf. Die Länge L ist vorzugsweise derart ausgebildet, dass ein Finger, insbesondere ein Zeigefinger eines Benutzers der Handwerkzeugmaschine 100, an der Verbindungsschnittstelle 128 durch den Hitzeschutzflügel 170 vom Getriebegehäuse 125 abgeschirmt wird. Bevorzugt weist die Länge L annähernd 33 mm auf.Furthermore, the at least one heat protection wing 170 illustratively has a length L in the direction of the axis of rotation 199 of the tool holder 140 or along the longitudinal extension 118 of the grip area 115 . The length L is preferably formed in such a way that a finger, in particular an index finger of a user of the hand-held power tool 100, is shielded from the transmission housing 125 by the heat protection wing 170 at the connection interface 128. Preferably the length L is approximately 33mm.

Darüber hinaus weist der mindestens eine Hitzeschutzflügel 170 zur Wärmeisolation illustrativ eine Dicke D auf. Vorzugsweise weist die Dicke D mindestens 1,5 mm auf. Bevorzugt weist der Hitzeschutzflügel 170 eine Dicke D von 3 mm auf.In addition, the at least one heat protection wing 170 illustratively has a thickness D for thermal insulation. The thickness D is preferably at least 1.5 mm. The heat protection wing 170 preferably has a thickness D of 3 mm.

Ebenfalls weist der mindestens eine Hitzeschutzflügel 170 senkrecht zur Längserstreckung 118 des Griffbereichs 115, bzw. entlang einer Quererstreckung (399 in Fig. 3) des Griffbereichs 115, illustrativ eine Breite B auf. Vorzugsweise ist die Breite B derart ausgebildet, dass ein direkter Kontakt eines Fingers, insbesondere eines Zeigefingers eines Benutzers der Handwerkzeugmaschine 100, senkrecht zur Längserstreckung 118 des Griffbereichs 115 zum Getriebegehäuse 125 durch den Hitzeschutzflügel 170 verhindert wird. Bevorzugt weist die Breite B annähernd 10 mm auf.The at least one heat protection wing 170 also points perpendicularly to the longitudinal extent 118 of the grip area 115, or along a transverse extent (399 in 3 ) of the grip area 115, illustratively has a width B. The width B is preferably configured in such a way that a direct contact of a finger, in particular an index finger, of a user of the hand-held power tool 100 perpendicular to the longitudinal extension 118 of the grip area 115 to the transmission housing 125 is prevented by the heat protection wing 170 . The width B is preferably approximately 10 mm.

Gemäß einer Ausführungsform verkleinert sich die Breite B des mindestens einen Hitzeschutzflügels 170 in Richtung der Rotationsachse 199 der Werkzeugaufnahme 140 zur Werkzeugaufnahme 140 hin. Dabei kann die Verkleinerung der Breite B beliebig ausgeführt sein, z.B. rampenförmig, bogenförmig und/oder stufenförmig. Die Verkleinerung weist bevorzugt einen Winkel kleiner 90°, vorzugsweise 45°, auf, wodurch eine Vergrößerung der Stabilität des Gehäuses 160, insbesondere des Hitzeschutzflügels 170, erreicht wird. Besonders bei einem Herunterfallen der Handwerkzeugmaschine 100 ist eine bessere Stabilität von Vorteil, um eine Zerstörung des Gehäuses 160 bzw. des Hitzeschutzflügels 170 zu verhindern.According to one embodiment, the width B of the at least one heat protection wing 170 decreases in the direction of the axis of rotation 199 of the tool holder 140 towards the tool holder 140 . The width B can be reduced as desired, e.g. in the form of a ramp, arc and/or in steps. The reduction preferably has an angle of less than 90°, preferably 45°, as a result of which the stability of the housing 160, in particular of the heat protection wing 170, is increased. Better stability is advantageous in particular if the hand-held power tool 100 falls down, in order to prevent the housing 160 or the heat protection wing 170 from being destroyed.

Bevorzugt hat der mindestens eine Hitzeschutzflügel 170 jedoch eine Breite B, die zumindest derart ausgebildet ist, dass der Griffbereich 115 im Bereich der Verbindungsschnittstelle 128 durch den Hitzeschutzflügel 170 vollständig vom Getriebegehäuse 125 wärmeisolierend getrennt ist. D.h. der mindestens eine Hitzeschutzflügel 170 überragt das Getriebegehäuse 125 entlang der Verbindungsschnittstelle 128 aufgrund seiner Breite B vollständig. Des Weiteren schließt der mindestens eine Hitzeschutzflügel 170 vorzugsweise bündig, insbesondere spaltfrei, am Getriebegehäuse 125, ab.However, the at least one heat protection wing 170 preferably has a width B that is at least configured such that the gripping area 115 in the area of the connection interface 128 is completely thermally insulated from the transmission housing 125 by the heat protection wing 170. I.e. the at least one heat protection wing 170 protrudes completely beyond the transmission housing 125 along the connection interface 128 due to its width B. Furthermore, the at least one heat protection wing 170 preferably terminates flush, in particular without a gap, on the transmission housing 125.

Des Weiteren verdeutlicht Fig. 2 das zumindest eine Wärmeisolationselement 127 von Fig. 1. Bevorzugt weist das zumindest eine Wärmeisolationselement 127 in Richtung der Rotationsachse 199 der Werkzeugaufnahme 140, bzw. entlang der Längserstreckung 118 des Griffbereichs 115, eine Länge von bevorzugt 25 mm auf. Darüber hinaus weist das Wärmeisolationselement 127 zumindest annähernd senkrecht zur Längserstreckung 118 des Griffbereichs 115 vorzugsweise eine Breite von annähernd 30 mm auf. Bevorzugt weist das zumindest eine Wärmeisolationselement 127 eine Dicke d von zumindest 1,5 mm, bevorzugt 3,5 mm, auf.Furthermore clarified 2 the at least one thermal insulation element 127 of 1 . The at least one thermal insulation element 127 preferably points in the direction of the axis of rotation 199 of the tool holder 140, or along it the longitudinal extension 118 of the grip area 115, a length of preferably 25 mm. In addition, the thermal insulation element 127 preferably has a width of approximately 30 mm, at least approximately perpendicularly to the longitudinal extension 118 of the grip area 115 . The at least one thermal insulation element 127 preferably has a thickness d of at least 1.5 mm, preferably 3.5 mm.

Wie oben beschrieben, ist das Wärmeisolationselement 127 an dem Gehäuse 160 angeordnet, insbesondere an dieses angespritzt. Illustrativ ist das Wärmeisolationselement 127 in Längserstreckung 118 des Griffbereichs 115 am Getriebegehäuse 125 platziert. Hierbei ist das Wärmeisolationselement 127 zwischen zwei Verschraubungsflanschen 211, 212 des Getriebegehäuses 125 positioniert. Das zumindest eine Wärmeisolationselement 127 kann dabei als Wärmeschutz bei einem Beaufschlagen der Handwerkzeugmaschine 100 an einem der Werkzeugaufnahme 140 gegenüberliegenden Ende ausgebildet sein. Darüber hinaus können auch mehrere Wärmeisolationselemente 127 im Bereich des Getriebegehäuses 125 angeordnet sein.As described above, the thermal insulation element 127 is arranged on the housing 160, in particular molded onto it. Illustratively, the thermal insulation element 127 is placed in the longitudinal extent 118 of the grip area 115 on the transmission housing 125 . In this case, the thermal insulation element 127 is positioned between two screw flanges 211 , 212 of the transmission housing 125 . The at least one thermal insulation element 127 can be embodied as thermal protection when hand-held power tool 100 is subjected to pressure at an end opposite tool holder 140 . In addition, several thermal insulation elements 127 can also be arranged in the area of the transmission housing 125 .

Die Verschraubungsflansche 211, 212 des Getriebegehäuses 125 dienen zur Aufnahme eines Schraubelements zur Verbindung des Getriebegehäuses 125 mit dem Gehäuse 160. Bevorzugt ist der mindestens eine Hitzeschutzflügel 170 am Verschraubungsflansch 212 angeordnet. Vorzugsweise ist der Verschraubungsflansch 212 im Bereich des Drehrichtungsumkehrschalters 196 angeordnet.The screw flanges 211, 212 of the gear housing 125 serve to accommodate a screw element for connecting the gear housing 125 to the housing 160. The at least one heat protection wing 170 is preferably arranged on the screw flange 212. The screw flange 212 is preferably arranged in the area of the switch 196 for reversing the direction of rotation.

Es wird darauf hingewiesen, dass die oben angegebenen Werte lediglich beispielhaften Charakter haben. Somit können die Werte für die Länge L, die Breite B, die Dicke D und/oder den Abstand A des Hitzeschutzflügels 170 auch größer oder kleiner vorgegeben sein. Darüber hinaus kann auch das zumindest eine Wärmeisolationselement 127 andere Dimensionen aufweisen, als die oben beschriebenen.It is pointed out that the values given above are only exemplary. Thus, the values for the length L, the width B, the thickness D and/or the distance A of the heat protection wing 170 can also be larger or smaller. In addition, the at least one thermal insulation element 127 can also have dimensions other than those described above.

Fig. 3 zeigt die Handwerkzeugmaschine 100 von Fig. 1 und Fig. 2 mit dem Gehäuse 160 sowie dem Getriebegehäuse 125. Wie oben beschrieben, weist das Gehäuse 160, bzw. der Griffbereich 115, gemäß einer Ausführungsform zwei Gehäusehälften 112 auf, die diametral gegenüberliegend zueinander angeordnet sind. Illustrativ weist jede Gehäusehälfte 112 einen Hitzeschutzflügel 170 auf. Die Hitzeschutzflügel 170 sind dabei, wie oben beschrieben, zumindest annähernd senkrecht zur Längserstreckung 118 des Griffbereichs 115, bzw. zumindest annähernd entlang einer Quererstreckung 399 des Griffbereichs 115, ausgebildet. 3 shows the handheld power tool 100 from FIG 1 and 2 with the housing 160 and the gear housing 125. As described above, the housing 160, or the handle area 115, according to one embodiment, has two housing halves 112 which are arranged diametrically opposite one another are. Illustratively, each housing half 112 includes a heat shield wing 170 . As described above, the heat protection wings 170 are formed at least approximately perpendicular to the longitudinal extension 118 of the grip area 115, or at least approximately along a transverse extension 399 of the grip area 115.

Die Hitzeschutzflügel 170 müssen nicht senkrecht zur Längserstreckung 118 angeordnet sein, sondern können auch in einem vorgegebenen Winkel zur Längserstreckung 118 ausgerichtet sein. Bevorzugt ist der vorgegebene Winkel größer 100° und kleiner gleich 120°. Dadurch kann die Stabilität des Gehäuses 160, insbesondere des Hitzeschutzflügels 170, vergrößert werden. Darüber hinaus können die illustrativ zwei Hitzeschutzflügel 170 auch unterschiedlich dimensioniert sein und/oder in unterschiedlichen Winkeln zur Längserstreckung 118 ausgebildet sein.The heat protection wings 170 do not have to be arranged perpendicularly to the longitudinal extension 118 but can also be aligned at a predetermined angle to the longitudinal extension 118 . The predetermined angle is preferably greater than 100° and less than or equal to 120°. As a result, the stability of the housing 160, in particular of the heat protection wing 170, can be increased. In addition, the illustrative two heat protection wings 170 can also be dimensioned differently and/or formed at different angles to the longitudinal extension 118 .

Claims (10)

  1. Hand-held machine tool (100), in particular an impact wrench, having a handle, wherein the handle has at least one grip region (115), and a drive unit (110) which has at least one drive motor (180) and a gearbox (120) for driving a tool receptacle (140), wherein the gearbox (120) is disposed in a gearbox housing (125) which comprises a thermally conducting material, and wherein the gearbox housing (125) at least in portions bears on an assigned connection interface (128) on the grip region (115), characterized in that
    at least one heat-protection wing (170) which comprises a thermally insulating material and is preferably configured so as to be at least approximately perpendicular to a longitudinal extent (118) of the grip region (115) is disposed on the assigned connection interface (128), wherein the at least one heat-protection wing (170) completely covers a surface of the gearbox housing (125) that faces the at least one heat-protection wing (170).
  2. Hand-held machine tool according to Claim 1, characterized in that the at least one heat-protection wing (170) is configured in one piece with a housing (160) which configures the grip region (115), wherein the drive motor (180) is preferably disposed in the housing (160).
  3. Hand-held machine tool according to Claim 1 or 2, characterized in that the at least one heat-protection wing (170) is disposed in the region of a direction-of-rotation reversal switch (196), wherein the at least one heat-protection wing (170) in the direction towards the assigned connection interface (128) is disposed at a spacing (A) of approximately 10 mm from the direction-of-rotation reversal switch (196).
  4. Hand-held machine tool according to one of the preceding claims, characterized in that the at least one heat-protection wing (170) in the direction of a rotation axis (199) of the tool receptacle (140) has a length (L) of approximately 33 mm.
  5. Hand-held machine tool according to one of the preceding claims, characterized in that the at least one heat-protection wing (170) for thermal insulation has a thickness (D) of at least 1.5 mm.
  6. Hand-held machine tool according to one of the preceding claims, characterized in that the at least one heat-protection wing (170), perpendicular to the longitudinal extent (118) of the grip region (115), has a width (B) of approximately 10 mm.
  7. Hand-held machine tool according to Claim 6, characterized in that the width (B) of the at least one heat-protection wing (170) in the direction of a rotation axis (199) of the tool receptacle (140) decreases towards the tool receptacle (140).
  8. Hand-held machine tool according to one of the preceding claims, characterized in that the grip region (115) is configured from two housing halves (112) which are disposed so as to be diametrically opposite one another, wherein each housing half (112) has a heat-protection wing (170).
  9. Hand-held machine tool according to one of the preceding claims, characterized in that at least one thermal insulation element (127) is disposed on the gearbox housing (125).
  10. Hand-held machine tool according to one of the preceding claims, characterized in that the thermally insulating material and/or the thermal insulation element (127) comprise/comprises plastics material and/or the thermally conducting material comprises light metal.
EP20212608.2A 2019-12-19 2020-12-09 Handheld machine tool with finger protection Active EP3845341B1 (en)

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DE102019220251.9A DE102019220251A1 (en) 2019-12-19 2019-12-19 Finger protection for impact wrenches

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CN115026751A (en) * 2022-06-22 2022-09-09 江苏东成工具科技有限公司 Ratchet wrench
DE102022208953A1 (en) 2022-08-30 2024-02-29 Robert Bosch Gesellschaft mit beschränkter Haftung Hand tool

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Publication number Priority date Publication date Assignee Title
DE2628826A1 (en) * 1976-06-26 1978-02-23 Mey Kg Maschf Mafell Electrically driven tool gearwheel - has hub and gear ring joined together by insulating material
SE520071C2 (en) * 1998-08-20 2003-05-20 Atlas Copco Tools Ab Portable power tool with heat shielding means
DE102011089032A1 (en) * 2011-12-19 2013-06-20 Robert Bosch Gmbh Hand-held power tool e.g. drilling hammer, has air guiding units providing pressure connection between compressor unit and working unit, where one of air guiding units is arranged in heat transfer functional unit
DE102012207332A1 (en) * 2012-05-03 2013-11-07 Robert Bosch Gmbh Hand-held power tool e.g. rechargeable battery powered rotary percussion screwdriver has heat-insulating protective element that is provided for heat conductive locking sleeve used for locking insertion tool in inner housing
US10821591B2 (en) * 2012-11-13 2020-11-03 Milwaukee Electric Tool Corporation High-power cordless, hand-held power tool including a brushless direct current motor
DE102014208494A1 (en) * 2014-05-07 2015-11-12 Robert Bosch Gmbh Hand tool with a mounting interface for positive and non-positive connection of a tool attachment
JP6801798B2 (en) * 2017-12-28 2020-12-16 工機ホールディングス株式会社 Strike work machine

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