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EP3383585B1 - Machine-outil à main comportant au moins un élément de contact côté machine - Google Patents

Machine-outil à main comportant au moins un élément de contact côté machine 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)
English (en)
Other versions
EP3383585A1 (fr
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
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 EP3383585A1 publication Critical patent/EP3383585A1/fr
Application granted granted Critical
Publication of EP3383585B1 publication Critical patent/EP3383585B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status 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.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Grinding-Machine Dressing And Accessory Apparatuses (AREA)
  • Sawing (AREA)
  • Portable Power Tools In General (AREA)

Claims (7)

  1. Machine-outil à main (10), notamment meuleuse d'angle, avec une partie de carter de transmission (12), la partie de carter de transmission (12) présentant au moins un élément de contact (24) côté machine, avec un accessoire (26), l'accessoire (26) présentant au moins un élément de contact (28) côté accessoire, caractérisée en ce que lorsque l'accessoire (26) est monté sur la machine-outil à main (10), l'élément de contact (24) côté machine vient en contact avec l'élément de contact (28) côté accessoire, un élément de blocage (30) étant agencé dans la partie de carter de transmission (12), lequel est prévu pour bloquer un élément mécanique (32) lorsque l'accessoire (26) n'est pas monté, de telle sorte que la machine-outil à main (10) ne peut pas être mise en marche, l'élément de blocage (30) présentant une butée (42), de telle sorte que l'élément mécanique (32) se déplace contre la butée (42) de l'élément de blocage (30) lorsque l'accessoire (26) n'est pas monté.
  2. Machine-outil à main (10) selon la revendication 1, caractérisée en ce que l'élément mécanique (32) est conçu sous forme d'élément de commutation (32), notamment sous forme de curseur de commutation.
  3. Machine-outil à main (10) selon la revendication 1, caractérisée en ce que l'élément mécanique (32) est conçu sous forme d'arbre mécanique (32), notamment sous forme d'arbre moteur.
  4. Machine-outil à main (10) selon la revendication 1, caractérisée en ce que l'élément mécanique (32) est conçu sous forme d'arbre de sortie (32), notamment sous forme de broche.
  5. Machine-outil à main (10) selon l'une quelconque des revendications précédentes, caractérisée en ce que l'élément de blocage (30) présente une articulation rotative (40).
  6. Machine-outil à main (10) selon la revendication 5, caractérisée en ce que, lorsque l'accessoire (26a, 26b) est monté, l'élément de blocage (30) est soumis à une force F, l'élément de blocage (30) étant déplacé autour d'un axe de rotation (50) de l'articulation rotative (40) .
  7. Machine-outil à main (10) selon l'une quelconque des revendications 5 à 6, caractérisée en ce que, par rotation de l'élément de blocage (30) autour de l'axe de rotation (50) de l'articulation rotative (40), la butée (42) de l'élément de blocage (30) est déplacée de telle sorte que l'élément mécanique (32) peut être déplacé en direction de la partie de carter de transmission (12) et la machine-outil à main (10) peut être mise en marche.
EP16788712.4A 2015-12-02 2016-11-02 Machine-outil à main comportant au moins un élément de contact côté machine Active EP3383585B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015224006.1A DE102015224006A1 (de) 2015-12-02 2015-12-02 Handwerkzeugmaschine mit mindestens einem maschinenseitigem Kontaktelement
PCT/EP2016/076374 WO2017092947A1 (fr) 2015-12-02 2016-11-02 Machine-outil à main comportant au moins un élément de contact côté machine

Publications (2)

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

Family

ID=57218910

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16788712.4A Active EP3383585B1 (fr) 2015-12-02 2016-11-02 Machine-outil à main comportant au moins un élément de contact côté machine

Country Status (5)

Country Link
US (1) US11260502B2 (fr)
EP (1) EP3383585B1 (fr)
CN (1) CN108367409B (fr)
DE (1) DE102015224006A1 (fr)
WO (1) WO2017092947A1 (fr)

Families Citing this family (7)

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Publication number Priority date Publication date Assignee Title
JP2019155486A (ja) * 2018-03-07 2019-09-19 株式会社マキタ 電動工具
JP7110025B2 (ja) * 2018-08-07 2022-08-01 株式会社マキタ 電動工具
US20230158630A1 (en) * 2020-04-10 2023-05-25 Makita Corporation Tool
GB2598736A (en) * 2020-09-09 2022-03-16 Black & Decker Inc Side handle presence and gripping detection in a power tool
JP2022162914A (ja) * 2021-04-13 2022-10-25 株式会社マキタ 工具
EP4101598A1 (fr) 2021-06-07 2022-12-14 Black & Decker, Inc. Poignée latérale pour outil électrique
US12485526B2 (en) 2023-03-13 2025-12-02 Black & Decker Inc. Gear case grip accessory for power tool

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DE3313704C2 (de) * 1983-04-15 1985-05-09 Metabowerke GmbH & Co, 7440 Nürtingen Handwerkzeugmaschine, insbesondere Winkelschleifmaschine
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DE3644441A1 (de) * 1986-12-24 1988-07-07 Bosch Gmbh Robert Spanneinrichtung zum loesbaren befestigen eines werkzeuges, insbesondere einer scheibe
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JP2977076B2 (ja) * 1996-03-01 1999-11-10 リョービ株式会社 電動工具のスイッチ機構
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Also Published As

Publication number Publication date
EP3383585A1 (fr) 2018-10-10
CN108367409A (zh) 2018-08-03
WO2017092947A1 (fr) 2017-06-08
CN108367409B (zh) 2021-03-19
US20180326554A1 (en) 2018-11-15
US11260502B2 (en) 2022-03-01
DE102015224006A1 (de) 2017-06-08

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