EP2886248A1 - Ponceuse à excentrique fonctionnant à l'aide d'une batterie rechargeable - Google Patents

Ponceuse à excentrique fonctionnant à l'aide d'une batterie rechargeable Download PDF

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Publication number
EP2886248A1
EP2886248A1 EP14195992.4A EP14195992A EP2886248A1 EP 2886248 A1 EP2886248 A1 EP 2886248A1 EP 14195992 A EP14195992 A EP 14195992A EP 2886248 A1 EP2886248 A1 EP 2886248A1
Authority
EP
European Patent Office
Prior art keywords
battery
housing part
axis
eccentric grinder
operated
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.)
Withdrawn
Application number
EP14195992.4A
Other languages
German (de)
English (en)
Inventor
Joachim Schadow
Florian Esenwein
Manfred Lutz
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 EP2886248A1 publication Critical patent/EP2886248A1/fr
Withdrawn legal-status Critical Current

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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
    • 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
    • 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
    • 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
    • B24B23/03—Portable grinding machines, e.g. hand-guided; Accessories therefor with rotating grinding tools; Accessories therefor the tool being driven in a combined movement
    • 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
    • B24B23/04—Portable grinding machines, e.g. hand-guided; Accessories therefor with oscillating grinding tools; Accessories therefor
    • 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
    • B24B47/00—Drives or gearings; Equipment therefor
    • B24B47/10—Drives or gearings; Equipment therefor for rotating or reciprocating working-spindles carrying grinding wheels or workpieces
    • B24B47/12—Drives or gearings; Equipment therefor for rotating or reciprocating working-spindles carrying grinding wheels or workpieces by mechanical gearing or electric power
    • 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
    • B24B55/02—Equipment for cooling the grinding surfaces, e.g. devices for feeding coolant

Definitions

  • the invention relates to a battery-operated eccentric grinder with a rechargeable battery.
  • the battery-powered eccentric grinder according to the invention with the features of claim 1 has the advantage of being particularly compact and powerful.
  • At least one first housing part receives at least one output shaft, which is intended to drive a machining tool.
  • the output shaft defines a first axis coaxial with the output shaft.
  • a height h of the first housing part extends along the first axis.
  • At least one second housing part receives at least one electric motor drive acting on a motor shaft.
  • the motor shaft advantageously defines a second axis coaxial with the motor shaft.
  • An overall length I of the battery-operated eccentric grinder extends according to the invention along the second axis.
  • the machining tool has a diameter d.
  • a ratio of the total length l of the battery-driven eccentric grinder to the diameter d of the machining tool is greater than or equal to 1.4, but preferably 2.5.
  • a precise working with the battery-operated eccentric sander is possible with a machining tool of this size.
  • the axis of the machining tool of the battery-operated hand tool machine performs an eccentric movement.
  • the axis of the machining tool for high removal rate is additionally driven in the forced driving.
  • the battery-operated eccentric sander has a center of gravity S arranged in the second housing part, which lies on a partial length I 1 which is related to an x direction of the battery-driven eccentric sander.
  • the second housing part is formed as an elongated, at least a first handle having housing.
  • the term "handle” is intended to mean a component around which one hand of an operator of the battery operated eccentric grinder can be placed to guide the battery operated eccentric grinder.
  • the first housing part has at least one second handle, an ergonomic guidance of the battery-operated eccentric grinder is possible.
  • a distance x between the first handle and the second handle is between 100 and 300 mm, but in particular between 120 and 250 mm.
  • the handling is improved, in particular when higher forces act in the region of the output shaft, when the second axis is arranged at an angle a to the first axis, which lies between 45 ° and 130 °, but is preferably 90 °. Furthermore, it is conceivable that the angle a is adjustable.
  • a height h of the first housing part along the first axis is preferably 120 mm.
  • At least one air inlet opening is provided on the second housing part, through which ambient air can advantageously flow into the first housing part.
  • At least one air outlet opening is advantageously provided on the first housing part, by means of which the cooling air removes thermal energy arising during operation of the battery-operated eccentric sander. Thus, an effective cooling is guaranteed.
  • FIG. 1 a battery-operated eccentric grinder 10 with a rechargeable battery 12 as an energy source is shown in a schematic representation.
  • An output shaft 14, which is intended to drive a machining tool 16 is received by a first housing part 18.
  • the output shaft 14 defines a first axis 20 which is coaxial with the output shaft 14.
  • a height h of the first housing part 18 extends along the first axis 20.
  • the output shaft 14 is connected via an eccentrically arranged bearing with a support shaft which carries the machining tool 16.
  • the machining tool 16 of the battery-operated eccentric grinder 10 in the exemplary embodiment is a sanding pad, on the underside of which an abrasive for surface treatment of a workpiece can be fastened.
  • the bearing can be designed as a ball bearing and allows a self-rotation of the support shaft about an axis of rotation, which also represents the axis of rotation of the machining tool 16.
  • the axis of rotation of the support shaft is located at an eccentric distance parallel to the axis of rotation 20 of the output shaft 14th
  • a second housing part 22 adjoins the first housing part 18.
  • the second housing part 22 receives an electric motor drive 24.
  • the electromotive drive 24 drives a motor shaft 26.
  • the motor shaft 26 defines a second axis 28 coaxial with the motor shaft 26.
  • a total length I of the battery-operated eccentric grinder 10 extends along the second axis 28. The total length I is in this case the geometric extension of a first wall 29 which is disposed on the first housing part 18, to a battery-side second wall 21 on the second housing part 22.
  • Bei mounted machining tool 16 is the total length I, the geometric extent of the first wall 29 to the battery side second wall 21 or the geometric extent of a defined by a diameter d of the machining tool 16 point 55 on the circumference of the machining tool 16 to the battery-side second wall 21st
  • the geometric extent of the rechargeable battery 12 is not included here.
  • the electromotive drive 24 is usually designed as an electric motor.
  • the electric motor may be an electronically commutated electric motor.
  • An electronics 30 is also arranged in the second housing part 22.
  • the electronics 30 is located between the rechargeable battery 12 and the electric motor drive 24.
  • the electronics 30 is provided to energize the electric motor drive 24. It is also conceivable that the electronics 30 integrated, for example, in the electric motor drive 24 or separately.
  • the machining tool 16 has the diameter d in the embodiment according to the invention.
  • a ratio of the total length l of the battery-driven eccentric grinder 10 to the diameter d of the machining tool 16 is greater than or equal to 1.4.
  • the ratio of the total length l of the battery-operated eccentric grinder 10 to the diameter d of the machining tool 16 is preferably 2.5.
  • the battery-operated eccentric grinder 10 has a center of gravity S located in the second housing part 22.
  • the center of gravity S is located on the second axis 28.
  • the center of gravity S is in this case on a length I 1 , which, starting from the first axis 20 in an x-direction of FIG. 1 extends.
  • the length I 1 is a fraction of the total length I of the second housing part 22, which is also in the x direction of the FIG. 1 extends.
  • I 1 k * I, where k is between 0.4 and 0.6, but especially 0.5.
  • Advantages of this arrangement are in a particularly ergonomic arrangement of the center of gravity.
  • the arrangement of the center of gravity is chosen particularly favorable, so that the battery-operated eccentric grinder can be performed particularly fatigue in operation with mounted rechargeable battery 12.
  • the second housing part 22 is formed as an elongated housing which forms a first handle 32, which serves as a handle handle 32.
  • a handle is a component around which an operator of the battery operated orbital sander 10 can lay a hand to guide the battery operated orbital sander 10.
  • the first handle 32 is in this case encompassed in particular by the thumb and forefinger plane of the hand of the operator. Under the thumb and index finger level of the hand of the operator should be understood here in particular the plane of the thumb end joint, the connection between the thumb and forefinger and the Indexing finger joint is clamped so that the palm lies on the handle top.
  • the first housing part 18 has at least one second handle 34 which is arranged on a side facing away from the machining tool 16 on the first housing part 18.
  • the second handle 34 is in particular from the first housing part 18 in one piece approximately at right angles.
  • the second handle defines a point P by crossing two handle axes 38, 40.
  • the first handle axis 38 extends parallel to the first axis 20.
  • the second handle axis 40 extends parallel to the second axis 28.
  • the second handle 34 is gripped by a second hand of the operator to couple a force in an axial direction to the first housing part 18 and / or to stabilize the guidance of the battery-driven eccentric grinder.
  • a distance x which is at least 100 mm.
  • the distance x between the first handle 32 and the second handle 34 is between 120 and 250 mm. This distance range allows a particularly ergonomic guidance of the battery-driven eccentric grinder 10 in two-hand operation.
  • the second axis 28 is arranged at an angle to the first axis 20.
  • the second axis is arranged at an angle a to the first axis 20, which is between 45 ° and 130 °, but is preferably 90 °.
  • the angle specification does not take into account manufacturing tolerances.
  • the first housing part has a height h along the first axis, which is preferably 120 mm.
  • the height h is defined here as the distance from the point P to the bottom 42 of the machining tool 16.
  • a dust extraction device 42 attached to the first housing part 18.
  • the machining tool 16 distributed over the circumference bores are introduced, is sucked on the resulting during processing of the workpiece grinding dust by means of a motor and / or dust blower 46 in the first housing part 18, wherein the engine and / or dust blower 46 fixed to the output shaft 14 is connected.
  • the transported through the holes of the machining tool 16 grinding dust is passed through the dust extraction device 42 in a dust collector, not shown.
  • air inlet openings 48 are provided, flows through the ambient air into the first housing part 22.
  • air outlet opening 50 is provided, transported by the cooling air during operation of the battery-operated eccentric grinder 10 resulting thermal energy.
  • a not-shown switching element is intended to turn on the battery-operated eccentric grinder 10.
  • the switching element can be designed, for example, as a dead man's switch. But it is also conceivable that the switching element is designed as a throttle switch or as a locking switch.
  • the hand tool 10 is designed as a battery-powered eccentric grinder 10.
  • the rechargeable battery 12 is connected to a rear side 52.
  • the battery voltage is between 7.2 and 22 V, but is preferably 18V. The values of the battery voltage do not take into account possible battery voltage fluctuations.
  • the rechargeable battery 12 consists in particular of lithium ion battery cells.
  • Lithium ion batteries are characterized by a high energy density and thermal stability even at high loads, which means high performance.
  • Another big advantage is the low self-discharge, which also means that the batteries are ready for use even with longer service lives.
  • a battery voltage indicator is integrated in the handle area.
  • the battery voltage indicator may be provided to a height of the Optically display battery voltage. This can be done with the help of colored LED, flashing LED, digital display elements, LCD and the like.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
EP14195992.4A 2013-12-13 2014-12-03 Ponceuse à excentrique fonctionnant à l'aide d'une batterie rechargeable Withdrawn EP2886248A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102013225885.2A DE102013225885A1 (de) 2013-12-13 2013-12-13 Batteriebetriebener Exzenterschleifer mit einer wiederaufladbaren Batterie

Publications (1)

Publication Number Publication Date
EP2886248A1 true EP2886248A1 (fr) 2015-06-24

Family

ID=52101035

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14195992.4A Withdrawn EP2886248A1 (fr) 2013-12-13 2014-12-03 Ponceuse à excentrique fonctionnant à l'aide d'une batterie rechargeable

Country Status (3)

Country Link
EP (1) EP2886248A1 (fr)
CN (1) CN104708521A (fr)
DE (1) DE102013225885A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106346336A (zh) * 2015-07-14 2017-01-25 天津金盛德钢管制造有限公司 一种新型的多功能钢管打磨机
WO2023180554A1 (fr) * 2022-03-25 2023-09-28 Festool Gmbh Meuleuse portative comportant un accumulateur d'énergie et un raccord d'évacuation de poussière

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9387578B2 (en) 2013-10-28 2016-07-12 Black & Decker Inc. Handle arrangement for sander
CN106392835B (zh) * 2015-07-30 2019-03-08 南京德朔实业有限公司 砂光机
US10632589B2 (en) 2016-08-29 2020-04-28 Black & Decker Inc. Power tool
CN108527092B (zh) * 2017-03-06 2021-06-18 南京德朔实业有限公司 可双手操作的砂光机
DE102018206872A1 (de) * 2018-05-04 2019-11-07 Robert Bosch Gmbh Schleifmaschinengehäuse

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19815443C1 (de) * 1998-04-07 1999-12-23 Fein C & E Schleifgerät
DE102005014045A1 (de) * 2005-03-23 2006-09-28 Robert Bosch Gmbh Handwerkzeugmaschine mit einem Schleifteller
WO2008016840A1 (fr) * 2006-08-03 2008-02-07 3M Innovative Properties Company Outil de ponçage
US20080057842A1 (en) * 2006-09-05 2008-03-06 Dynabrade, Inc. Locking random orbital dual-action head assembly
DE202011004232U1 (de) * 2011-03-21 2011-05-26 Kochanski, Boris, Dipl.-Ing., 46240 Exzentrisch wirkende Polier- oder Schleifvorrichtung mit Kühlung durch Antriebsdruckluft
WO2011061104A1 (fr) * 2009-11-23 2011-05-26 Leo Lustig Meuleuse à disque

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005005553A1 (de) * 2005-02-07 2006-08-10 Robert Bosch Gmbh Elektrische Handwerkzeugmaschine
DE102007018466A1 (de) * 2007-04-19 2008-10-23 Robert Bosch Gmbh Motorisch angetriebene Werkzeugmaschine
DE102008041717A1 (de) * 2008-08-29 2010-03-04 Robert Bosch Gmbh Handwerkzeugmaschine mit Bürstenmotor
DE102010039152A1 (de) * 2010-08-10 2012-02-16 Robert Bosch Gmbh Gerät zur Oberflächenbehandlung, insbesondere Schleifgerät, Poliergerät od. dgl.

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19815443C1 (de) * 1998-04-07 1999-12-23 Fein C & E Schleifgerät
DE102005014045A1 (de) * 2005-03-23 2006-09-28 Robert Bosch Gmbh Handwerkzeugmaschine mit einem Schleifteller
WO2008016840A1 (fr) * 2006-08-03 2008-02-07 3M Innovative Properties Company Outil de ponçage
US20080057842A1 (en) * 2006-09-05 2008-03-06 Dynabrade, Inc. Locking random orbital dual-action head assembly
WO2011061104A1 (fr) * 2009-11-23 2011-05-26 Leo Lustig Meuleuse à disque
DE202011004232U1 (de) * 2011-03-21 2011-05-26 Kochanski, Boris, Dipl.-Ing., 46240 Exzentrisch wirkende Polier- oder Schleifvorrichtung mit Kühlung durch Antriebsdruckluft

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106346336A (zh) * 2015-07-14 2017-01-25 天津金盛德钢管制造有限公司 一种新型的多功能钢管打磨机
WO2023180554A1 (fr) * 2022-03-25 2023-09-28 Festool Gmbh Meuleuse portative comportant un accumulateur d'énergie et un raccord d'évacuation de poussière

Also Published As

Publication number Publication date
CN104708521A (zh) 2015-06-17
DE102013225885A1 (de) 2015-06-18

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