EP1842625B1 - Ponceuse électrique portative - Google Patents

Ponceuse électrique portative Download PDF

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Publication number
EP1842625B1
EP1842625B1 EP20070002153 EP07002153A EP1842625B1 EP 1842625 B1 EP1842625 B1 EP 1842625B1 EP 20070002153 EP20070002153 EP 20070002153 EP 07002153 A EP07002153 A EP 07002153A EP 1842625 B1 EP1842625 B1 EP 1842625B1
Authority
EP
European Patent Office
Prior art keywords
fan
bearing housing
electric hand
hand tool
dust
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
EP20070002153
Other languages
German (de)
English (en)
Other versions
EP1842625A1 (fr
Inventor
Jürgen Blickle
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.)
Metabowerke GmbH and Co
Original Assignee
Metabowerke GmbH and Co
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 Metabowerke GmbH and Co filed Critical Metabowerke GmbH and Co
Publication of EP1842625A1 publication Critical patent/EP1842625A1/fr
Application granted granted Critical
Publication of EP1842625B1 publication Critical patent/EP1842625B1/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
    • 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
    • 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
    • B24B55/06—Dust extraction equipment on grinding or polishing machines
    • B24B55/10—Dust extraction equipment on grinding or polishing machines specially designed for portable grinding machines, e.g. hand-guided
    • B24B55/102—Dust extraction equipment on grinding or polishing machines specially designed for portable grinding machines, e.g. hand-guided with rotating 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
    • B25F5/008—Cooling means

Definitions

  • the invention relates to an electric hand grinder, in particular an eccentric grinder or sander, according to the preamble of claim 1.
  • Such electric hand tool machines are essentially known in two types.
  • so-called two-shell machines are offered in which the housing is formed of two shells and in these housing shells for a storage of the drive shaft and the fan takes place and on the other hand, the drive motor is housed.
  • such machines are offered in pot construction in which a separate bearing housing, which is cup-shaped, with a machine housing in which the motor is arranged and which also serves as a handle is connected.
  • These bearing housings are designed in particular as metal housing.
  • Electric hand grinders usually have a fan which is mounted in the bearing housing for dust extraction or separation, with an external Staubabscheide device is connected via an opening provided in the bearing housing suction.
  • the resulting dust is here z. B. caused by the abrasion of the tool.
  • a dust extraction is further from the EP 1 129 822 B1 known, which has the task to provide an optimal and easy to manufacture seal the gearbox and drive parts on the one hand and a self-extraction of grinding dust.
  • the DE 36 20 136 A1 shows a hand grinder with a device for aspirating comprising a two-shell housing, which is provided that via a double fan, which carries fan blades rows on both sides of a separation surface, via a single fan both the engine cooling and a dust extraction can take place. Both air streams are then removed through a vent pipe.
  • an electric hand grinder according to the preamble of claim 1 with a bearing housing and a machine housing known, wherein the bearing housing is formed here as a two-shell housing and composed of two housing shells. It is already known from the document to provide a fan as a double fan having fan blades on both sides of a parting surface, one set of fan blades dust extraction or separation and the other set of engine cooling is used and divided by the separation surface, the bearing housing into two fan chambers is. In this case, openings are provided for the removal of air in the two-shell gear housing.
  • the invention now has the task of further improving an electric hand grinding machine, in particular an eccentric grinder or sander, with a pot-shaped bearing housing to the effect that a low overall height can be achieved.
  • the invention solves this object by an electric hand grinder with the features of claim 1, wherein the fan is designed as a double fan and has on both axial sides of a separating surface fan blades, one set of fan blades dust separation and the other set of engine cooling and serves through the separation surface the bearing housing is separated into two fan chambers, wherein in the bearing housing in the region of the fan chamber of the engine cooling at least one opening for discharging the cooling air is provided.
  • a corresponding arrangement is not yet known for electric hand grinders in the so-called pot construction. Rather, in such electric power tool machines always the cooling air for the engine cooling in the boundary region between the motor housing and subsequent bearing housing blown.
  • the height can now be significantly reduced.
  • a double fan which has fan blades on both surfaces separated by a separating surface, and the provision of at least one opening in the bearing housing in the region of the fan chamber of the engine cooling, the bearing housing can be attached directly to the machine housing in the axial direction, without air gaps to the outlet of the engine cooling air needed.
  • the openings extend over part of the circumference of the cup-shaped bearing housing, preferably over a quarter, in particular over one third and in particular half of the circumference.
  • the openings may be slit-shaped, particularly preferably two or more openings, which are in particular arranged symmetrically on the machine, may be provided.
  • the fan chambers are sealed against each other. This is done z. B. by means of a seal which corresponds to the separation surface of the fan and thus leads to a sealing of the fan chambers to each other.
  • the fan if it is an eccentric grinder, at the same time serves for mass balance by applied weights.
  • the fan chambers of dust extraction or separation with Staubabsaugö Maschinenen in be in fluid communication with the electrically driven tool.
  • this fan chamber corresponds to air intake openings, which are provided in the motor housing and are preferably located in the axial direction on the opposite side of the motor in the motor housing. There is also a flow connection between the openings in the bearing housing and these air intake openings. Another flow connection exists between the Staubabsaugö réelle in the fan chamber of the dust extraction on the fan chamber with the Staubansaugötechnischen in the tool.
  • the fan can be driven via the drive shaft.
  • the bearing housing is a metal housing made of an aluminum casting.
  • the at least one opening can be formed so that the part in the casting process is as easy as possible to produce, possibly without requiring additional slide in the mold, which make a removal possible.
  • FIG. 1 shows an eccentric grinder in a section along a drive shaft 10.
  • the eccentric grinder in this case comprises a machine housing 12 and a bearing housing 14, wherein the bearing housing is designed as an aluminum casting and in particular to FIG. 2 is explained in more detail.
  • the bearing housing 14 in this case has a cup-shaped shape and joins in the axial direction in the direction of a trained as a grinding wheel tool 16 to the machine housing 12 at.
  • the tool 16 is disposed releasably rotatably driven, wherein the tool can also perform an eccentric movement, which allows removal from a surface.
  • the drive device and the device for the eccentric movement are formed in a conventional manner.
  • an electric motor 18 is provided which serves to drive the drive shaft 10.
  • a main handle (not shown) and also not shown auxiliary handle are provided on the machine housing 12, which serve to guide and handle the grinder.
  • air inlet openings 20 are provided, into which air can be sucked in the direction of arrow 21 for cooling the electric motor 18.
  • the cooling air which is identified by the arrow 21, flows in the axial direction along the direction of the arrow 22 and thus serves to cool in particular an armature and a field of the motor 18th
  • the fan 24 has a perpendicular to the shaft 10 extending separating surface 26, both sides of which fan blade sets 28 and 30 are provided.
  • a seal is further provided, which shares the bearing housing 14 in two fan chambers 32 and 34 together with the separating surface 26.
  • the one fan chamber 34 is assigned to the engine cooling and the other fan chamber 32 of the dust extraction or - deposition.
  • the air flow which now passes along the motor 18, is directed through flow openings 38 in the region of the bearing housing 14 onto the fan blades 28 and blown out through them through air outlet openings 40 in the bearing housing 14.
  • dust is sucked together with dust through openings in the tool serving as the dust suction, indicated at 42, and the fan blades 30 in the fan chamber 32 associated with the dust extraction or separation , directed and discharged from here via an external dust extraction or separation, not shown in the illustration.
  • This can be saved by the provision of the fan 24 as a double fan height in the axial direction, since between the machine housing 12 and bearing housing 14 no gap must be provided for blowing air to the engine cooling. It is also not necessary that a second fan is used.
  • FIG. 2 now shows the bearing housing 14 in a three-dimensional view, in which case the flow openings 38 in the cup-shaped bearing housing 14 and the outflow openings 40 for the cooling air of the engine well see are.
  • the two openings 40 extend in a symmetrical arrangement to an axis of the arrangement of FIG. 1 over a portion of the circumference of the bearing housing 14.
  • the port for external dust extraction or deposition indicated here at 46.
  • the cup-shaped bearing housing 14 has a passage opening 48 for the drive and the drive shaft 10.
  • two ribs 50 are mounted, which serve to position the two shells of the machine housing 12, thus enabling a safe and easy assembly of the device.
  • a receptacle 52 for a setting knob can be seen, with which a stroke adjustment and thus an adjustment of the eccentricity of the tool 16 is possible.
  • an eccentric grinder in pot construction or other electric hand grinder in pot design can be provided, which requires a small height and realized at the same time Schau only a fan motor cooling and dust extraction or separation.

Landscapes

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

Claims (8)

  1. Ponceuse électrique portative, notamment ponceuse excentrique ou ponceuse vibrante, comprenant un carter de machine (12) ainsi qu'un logement de palier (14) en forme de pot, qui est assemblé au carter de machine (12) dans lequel est disposé un moteur (18) destiné à l'entraînement électrique d'un outil rotatif (16) qui lui est couplé par l'intermédiaire d'un arbre axial (10), sachant qu'un ventilateur (24) pour l'aspiration ou extraction des poussières est monté dans le logement de palier (14), ventilateur qui peut être relié à un dépoussiéreur externe par l'intermédiaire d'une ouverture d'évacuation (46) prévue dans le logement de palier (14), sachant que le ventilateur (24), en tant que ventilateur double, présente des pales de ventilateur (28, 30) de part et d'autre d'une surface de séparation (26), sachant qu'un groupe (30) de pales de ventilateur sert à l'aspiration ou extraction des poussières et l'autre groupe (28) au refroidissement du moteur, et que le logement de palier (14) est divisé par la surface de séparation (26) en deux chambres de ventilateur (32, 34), sachant qu'au moins une ouverture (40) destinée à évacuer l'air de refroidissement est prévue dans le logement de palier (14) dans la région de la chambre de ventilateur (34) pour le refroidissement du moteur, caractérisée en ce que le logement de palier est un logement métallique constitué d'une pièce moulée en aluminium.
  2. Ponceuse électrique portative selon la revendication 1, caractérisée en ce que l'ouverture au moins unique (40) s'étend sur une partie du pourtour du logement de palier (14) en forme de pot et est notamment réalisée du genre fente.
  3. Ponceuse électrique portative selon la revendication 1 ou 2, caractérisée en ce qu'il est prévu deux ouvertures (40) ou davantage.
  4. Ponceuse électrique portative selon l'une des revendications 1 à 3, caractérisée en ce que les chambres de ventilateur (32, 34) sont étanchées l'une par rapport à l'autre.
  5. Ponceuse électrique portative selon l'une des revendications précédentes, caractérisée en ce que la chambre de ventilateur (32) pour l'aspiration ou extraction des poussières se trouve en liaison fluidique avec des ouvertures (42) d'aspiration de poussières dans l'outil (16) à entraînement électrique.
  6. Ponceuse électrique portative selon l'une des revendications précédentes, caractérisée en ce que la chambre de ventilateur (34) pour le refroidissement du moteur se trouve en liaison fluidique avec des ouvertures (20) d'aspiration d'air qui sont disposées en direction axiale sur le côté opposé du moteur (18).
  7. Ponceuse électrique portative selon l'une des revendications précédentes, caractérisée en ce que l'ouverture (46) d'évacuation des poussières se trouve en liaison fluidique avec la chambre de ventilateur (32) pour l'aspiration ou extraction des poussières.
  8. Ponceuse électrique portative selon l'une des revendications précédentes, caractérisée en ce que le ventilateur (24) peut être entraîné au moyen de l'arbre d'entraînement (10).
EP20070002153 2006-04-07 2007-02-01 Ponceuse électrique portative Active EP1842625B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200610016480 DE102006016480A1 (de) 2006-04-07 2006-04-07 Elektrohandschleifmaschine

Publications (2)

Publication Number Publication Date
EP1842625A1 EP1842625A1 (fr) 2007-10-10
EP1842625B1 true EP1842625B1 (fr) 2010-05-19

Family

ID=37944758

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20070002153 Active EP1842625B1 (fr) 2006-04-07 2007-02-01 Ponceuse électrique portative

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EP (1) EP1842625B1 (fr)
DE (2) DE102006016480A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107984393A (zh) * 2017-12-14 2018-05-04 昆山万马五金有限公司 一种便于吸尘防噪式打磨机

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1189405B (de) * 1961-08-07 1965-03-18 Lutz Kg Eugen Staubabsaugvorrichtung fuer Tellerhandschleifmaschinen, insbesondere Falzschleifmaschinen
DE3620136C5 (de) * 1986-06-14 2007-01-11 Robert Bosch Gmbh Motorisch angetriebene Handschleifmaschine mit einem Exzenterantrieb
US5392568A (en) * 1993-12-22 1995-02-28 Black & Decker Inc. Random orbit sander having braking member
US5580302A (en) 1994-02-28 1996-12-03 Black & Decker Inc. Random orbit sander having air directing baffle
DE10010106A1 (de) * 2000-03-03 2001-09-13 Kress Elek K Gmbh & Co Exzentertellerschleifer
DE10329828B4 (de) * 2003-06-27 2009-06-18 Festool Gmbh Handwerkzeugmaschine mit Kühlvorrichtung und Staubabsaugung

Also Published As

Publication number Publication date
DE502007003818D1 (de) 2010-07-01
EP1842625A1 (fr) 2007-10-10
DE102006016480A1 (de) 2007-10-11

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