EP3845341B1 - Machine-outil portative à protection des doigts - Google Patents

Machine-outil portative à protection des doigts 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
Authority
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)
English (en)
Other versions
EP3845341A1 (fr
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
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP3845341A1 publication Critical patent/EP3845341A1/fr
Application granted granted Critical
Publication of EP3845341B1 publication Critical patent/EP3845341B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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 .

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Portable Power Tools In General (AREA)

Claims (10)

  1. Machine-outil portative (100), en particulier visseuse à chocs, dotée d'une poignée, la poignée présentant au moins une région de préhension (115), et d'une unité d'entraînement (110) qui présente au moins un moteur d'entraînement (180) et une transmission (120) pour l'entraînement d'un logement d'outil (140), la transmission (120) étant disposée dans un carter de transmission (125) qui présente un matériau thermoconducteur, et le carter de transmission (125) s'appuyant au moins dans certaines parties contre une interface de connexion associée (128) au niveau de la région de préhension (115), caractérisée en ce qu'au moins une ailette de protection thermique (170) est disposée au niveau de l'interface de connexion associée (128), laquelle ailette présente un matériau thermoisolant et est formée de préférence au moins approximativement perpendiculairement à une étendue longitudinale (118) de la région de préhension (115), l'au moins une ailette de protection thermique (170) recouvrant complètement une surface du carter de transmission (125) tournée vers l'au moins une ailette de protection thermique (170).
  2. Machine-outil portative selon la revendication 1, caractérisée en ce que l'au moins une ailette de protection thermique (170) est formée d'une seule pièce avec un carter (160) qui forme la région de préhension (115), le moteur d'entraînement (180) étant disposé de préférence dans le carter (160).
  3. Machine-outil portative selon la revendication 1 ou 2, caractérisée en ce que l'au moins une ailette de protection thermique (170) est disposée dans la région d'un commutateur d'inversion du sens de rotation (196), l'au moins une ailette de protection thermique (170) étant disposée de manière espacée d'une distance (A) d'approximativement 10 mm par rapport au commutateur d'inversion du sens de rotation (196) dans la direction de l'interface de connexion associée (128).
  4. Machine-outil portative selon l'une des revendications précédentes, caractérisée en ce que l'au moins une ailette de protection thermique (170) présente une longueur (L) d'approximativement 33 mm dans la direction d'un axe de rotation (199) du logement d'outil (140) .
  5. Machine-outil portative selon l'une des revendications précédentes, caractérisée en ce que l'au moins une ailette de protection thermique (170) pour l'isolation thermique présente une épaisseur (D) d'au moins 1,5 mm.
  6. Machine-outil portative selon l'une des revendications précédentes, caractérisée en ce que l'au moins une ailette de protection thermique (170) présente une largeur (B) d'approximativement 10 mm perpendiculairement à l'étendue longitudinale (118) de la région de préhension (115).
  7. Machine-outil portative selon la revendication 6, caractérisée en ce que la largeur (B) de l'au moins une ailette de protection thermique (170) diminue dans la direction d'un axe de rotation (199) du logement d'outil (140) vers le logement d'outil (140).
  8. Machine-outil portative selon l'une des revendications précédentes, caractérisée en ce que la région de préhension (115) est formée par deux moitiés de carter (112) qui sont disposées de manière diamétralement opposée l'une à l'autre, chaque moitié de carter (112) présentant une ailette de protection thermique (170).
  9. Machine-outil portative selon l'une des revendications précédentes, caractérisée en ce qu'au moins un élément d'isolation thermique (127) est disposé sur le carter de transmission (125).
  10. Machine-outil portative selon l'une des revendications précédentes, caractérisée en ce que le matériau thermoisolant et/ou l'élément d'isolation thermique (127) présentent une matière synthétique et/ou le matériau thermoconducteur présente un métal léger.
EP20212608.2A 2019-12-19 2020-12-09 Machine-outil portative à protection des doigts Active EP3845341B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102019220251.9A DE102019220251A1 (de) 2019-12-19 2019-12-19 Fingerschutz für Drehschlagschrauber

Publications (2)

Publication Number Publication Date
EP3845341A1 EP3845341A1 (fr) 2021-07-07
EP3845341B1 true EP3845341B1 (fr) 2022-09-21

Family

ID=73789833

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20212608.2A Active EP3845341B1 (fr) 2019-12-19 2020-12-09 Machine-outil portative à protection des doigts

Country Status (3)

Country Link
EP (1) EP3845341B1 (fr)
CN (1) CN113001477A (fr)
DE (1) DE102019220251A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115026751A (zh) * 2022-06-22 2022-09-09 江苏东成工具科技有限公司 棘轮扳手
DE102022208953A1 (de) 2022-08-30 2024-02-29 Robert Bosch Gesellschaft mit beschränkter Haftung Handwerkzeugmaschine

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2628826A1 (de) * 1976-06-26 1978-02-23 Mey Kg Maschf Mafell Zahnrad, insbesondere fuer ein getriebe eines elektrowerkzeugs
SE520071C2 (sv) * 1998-08-20 2003-05-20 Atlas Copco Tools Ab Portabelt kraftverktyg med värmeavskärmande organ
DE102011089032A1 (de) * 2011-12-19 2013-06-20 Robert Bosch Gmbh Handwerkzeugmaschine
DE102012207332A1 (de) * 2012-05-03 2013-11-07 Robert Bosch Gmbh Handwerkzeugmaschine
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 (de) * 2014-05-07 2015-11-12 Robert Bosch Gmbh Handwerkzeugmaschine mit einer Befestigungsschnittstelle zur form- und kraft-schlüssigen Anbindung eines Werkzeugvorsatzes
WO2019130982A1 (fr) * 2017-12-28 2019-07-04 工機ホールディングス株式会社 Machine de travail à percussion

Also Published As

Publication number Publication date
EP3845341A1 (fr) 2021-07-07
CN113001477A (zh) 2021-06-22
DE102019220251A1 (de) 2021-06-24

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