EP2303517A1 - Cable sleeve for a hand-held tool - Google Patents

Cable sleeve for a hand-held tool

Info

Publication number
EP2303517A1
EP2303517A1 EP09769055A EP09769055A EP2303517A1 EP 2303517 A1 EP2303517 A1 EP 2303517A1 EP 09769055 A EP09769055 A EP 09769055A EP 09769055 A EP09769055 A EP 09769055A EP 2303517 A1 EP2303517 A1 EP 2303517A1
Authority
EP
European Patent Office
Prior art keywords
cable
housing
grommet according
cable grommet
grommet
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Withdrawn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
EP09769055A
Other languages
German (de)
French (fr)
Inventor
Justus Lamprecht
Sinisa Andrasic
Marcus Schuller
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 EP2303517A1 publication Critical patent/EP2303517A1/en
Withdrawn legal-status Critical Current

Links

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

Definitions

  • the present invention is based on a cable grommet according to the preamble of
  • Mains powered hand tool machines are usually connectable by means of a cable to a power source.
  • the cable is encased by a substantially coaxial cable grommet at the cable outlet opening of the housing.
  • the cable grommet ensures under all operating conditions a relatively small bending angle of the cable at the outlet opening of the housing and thus prevents a sharp kinking of the cable with corresponding forces acting on the cable forces. As a result, the cable in the area of the sheathing is protected by the cable grommet against damage caused by extreme bending and also against other mechanical influences.
  • Electric motor sucked through inlet openings from the outside into the housing, past the engine and blown out through outlet openings to the outside. This creates negative pressure in the housing, which causes air to flow from the outside into the housing in corresponding areas through all the openings and gaps present, including through the gap between the cable and the cable grommet.
  • Gap is due to relatively rough manufacturing tolerances of the cable and the cable grommet and because of the use of only a few types of cable glands for a variety of cables of different outer diameter, which are required because of different global grid voltages. That's why currently several types of cable glands with different inner diameters necessary.
  • the sucked through the cable grommet air promotes dust particles from the working environment into the interior of the power tool.
  • dust particles are e.g. When using an angle grinder often metallic and can be deposited inside the housing to switches or other electrical, live elements. This can lead to bridging of the conductive metallic particles between the different voltage potentials. Corresponding arcing can lead to failures of the power tool and endanger the operator.
  • the invention with the features of claim 1 may serve as a seal and as a tolerance compensation depending on the design of the outer and / or inner shape of the cable grommet. This does not mean that for each country version of the
  • Hand tool a separate Jardintüllentyp be used and the variety of parts is reduced.
  • the cable grommet can serve at the same time as a power cable strain relief by the new design.
  • the cable grommet surrounds the cable in a radially sealingly frictional manner prevents water, dust and the like from penetrating into the interior of the housing, in particular because the cable grommet has a ring-like sealing means on its side facing the housing, sealingly on the outer circumference of the housing Cable supported.
  • the cable grommet is provided with a spiral, inwardly facing radial sealing lip, the cable can be inserted axially into a narrow cable grommet by screw-turning. Because the cable grommet has a plurality of annular sealing means on its side facing the housing, the sealing effect is improved.
  • the ring-like sealing means are configured as annular bead, in particular in the form of injected O-rings of another, especially soft-elastic than the material of the spout, the sealing effect can be improved and the production of the cable grommet can be simplified.
  • annular sealing means are designed as a hollow cylindrical plug, in particular wedge plug, which protrude into the hollow cylinder of the grommet, in particular on the front side, the sealing effect for special circumstances and special applications can be improved.
  • Inner of the housing protrudes and there is contracted encompassing in mounting position, so that a portion of the hollow nozzle is supported on the outside ring-like sealing outside, another easy-to-install Abdicht variant is created.
  • the housing consists of housing halves, each of which has a jaw-like part that belongs to a respective housing half shell, the sealing effect can be improved with the simplest means.
  • the sealing effect can be improved with further simplified means.
  • the sealing effect can be improved with further simplified, conventional inexpensive means.
  • FIG. 3 shows the cable grommet according to FIGS. 1 and 2 in longitudinal section as a detail
  • FIG. 4 shows a further cable bushing with a spiral, radial inner sealing lip
  • FIGS. 5 and 6 each show a variant of the cable grommet with a plurality of radial inner sealing lips
  • FIG. 7 shows a cable grommet with a hollow cylindrical stopper as a sealant
  • FIG. 8 shows a grommet with a pinch area and acted as a sealing means by clamping jaws
  • Figure 9 shows a cable grommet with pinch and acted as a sealant of a ring clamp-like part.
  • a cable grommet 22 shown in Figures 1, 2 and 3 has on its inner side Fontseite 30 an annular circumferential, inwardly facing radial sealing lip 28 which surrounds a retracted cable 36 elastically pressing and thus axially seals, the hollow cylinder 26 a to its end side 32 has thinning towards conical wall, which surrounds the cable 36 and after Reinforced outside panzernd.
  • the significantly thicker wall area in the area of the front side 30 absorbs a higher bending moment than nearer the end side 32 and thus prevents a sharp bending of the cable 36 with respect to the longitudinal axis 24 of the housing 10 at high bending forces acting on the cable 36, ie at an acute angle of about 90 ° with a minimum bending radius - and thus prevents the breaking of the cable strands inside the cable 36.
  • outside the cable grommet 22 is conventionally designed and associated with an outer annular groove 34 a matching ring projection 16 of the housing 10 and with its front side 30 a rib-like axial stop 18 of the housing 10 fixed.
  • the housing wall of 10, 12 forms a cable grommet 22 embracing cable grommet opening 14, through which the cable grommet 22 protrudes to the outside, while the cable 36 leads inside.
  • Cable grommet 22 can be selected via the design of their angle in the region of the sealing lip. If the sealing lip 28, as shown in FIG. 3, has a sawtooth structure, it can be assumed that the cable grommet 22 will have a relatively low, easy-to-install cable retraction force compared to a higher pull-out force. This supports the strain relief. For this purpose, corresponding grooves or cams on the cable 36 can be attached.
  • Figure 4 shows a cable grommet 220 having a helical, inwardly facing radial sealing lip 280 which may have graduated inner diameters for use with cables of different diameters. It can at
  • cable grommet 220 for large cable diameters to tight sealing lips be mechanically, thermally or otherwise removable.
  • the cable 36 is rotated in the cable grommet 220 in this principle, such as a screw in the nut thread.
  • material combinations of a one-piece cable grommet 220 between the conventional spout area and the sealing area are possible.
  • the cable bushings 2200, 22000 shown in FIGS. 5 and 6 each have two parallel, radial inner sealing lips 2800, 28000 of integrated annular beads or of O-rings of the same or different material as the cable sleeves. These, like the spiral-shaped sealing lip according to FIG. 4, may each have a different inner diameter for cables of different thicknesses, wherein for thicker cables, too narrow sealing lips may be mechanically, thermally or otherwise removable. A retracted cable will after the
  • annular beads such as e.g. Rectangle, square, ellipse and / or different materials of a one-piece cable grommet for the conventional spout area and the sealing area are also suitable.
  • the advantage of this variant is the selectability of a suitable size of the O-rings, also a wide choice of material for the sealing element is possible.
  • An embodiment of the sealing cross sections as a rectangle, square, ellipse sawtooth, etc. may also be advantageous in these cable grommets.
  • the cable grommet 221 shown in FIG. 7 carries on its front side 303 an elastic, hollow-cylindrical wedge element 281, which is pressed inside the hollow cylinder 263 of the cable grommet 221 and held fixed accordingly, e.g. by friction, a mechanical undercut, a rib on the housing or adhesive. As a result of the pressure, the wedge element pushes sealingly into the previously existing gap between wedge element and cable (not shown).
  • Another variant of a cable grommet produced in one piece according to the pattern of FIG. 7 with integrated cone is not shown.
  • the cable grommet 222 shown in Figure 8 has on its front side 302 a projecting, pipe socket-like portion 29 of small wall thickness. This area 29 develops its sealing function with respect to an inserted cable as soon as it is acted on radially from the outside by a force.
  • 10 opposing ribs 13 are integrated into the two half-shells 12 of the housing, in the assembly of the half-shells 12, the region 13 from the outside pincer-like cross-section narrowing deform and create a seal against the inserted cable.
  • a plurality of ribs can be laterally offset from one another and from one half-shell to the other half-shell against each other. This measure could act as a strain relief by the additional deformation of the power line.
  • the cable grommet 223 shown in Figure 9 has on its front side 303 a projecting, pipe socket-like portion 291 small wall thickness as the cable grommet according to Figure 8.
  • This area 291 develops its sealing function against an inserted cable as soon as it is acted upon radially from the outside by a force.
  • a squeezing element 11 is provided, which deforms the region 13 from the outside queritessverengend and creates a seal against an inserted cable.
  • squeezing element e.g. a twistable wire, a pipe clamp, a cable tie or similar means in question.
  • the cable grommets can also be configured in several parts or half-shell for ease of assembly.

Abstract

The invention relates to a cable sleeve (22) for guiding a cable (36) in the inlet and outlet region of a hand-held tool (10), the end of said sleeve on the housing side being connected to the housing (10) in a fixable manner, particularly in a form-fitting manner, having the advantage that no dust, dirt, or water may enter between the cable sleeve and the cable, in that the cable sleeve (22) has preferably radial sealing means (28) which correspond to the cable (36) and/or the housing (10) in a sealing manner.

Description

Beschreibung description
Titeltitle
Kabeltülle für HandwerkzeugmaschineCable grommet for hand tool
Die vorliegende Erfindung geht von einer Kabeltülle nach dem Oberbegriff desThe present invention is based on a cable grommet according to the preamble of
Anspruchs 1 aus.Claim 1 from.
Netzstrom betriebene Handwerkzeugmaschinen sind üblicherweise mittels eines Kabels an eine Stromquelle anschließbar. Das Kabel wird dabei durch eine im Wesentlichen koaxiale Kabeltülle an der Kabelaustrittsöffnung des Gehäuses ummantelt.Mains powered hand tool machines are usually connectable by means of a cable to a power source. The cable is encased by a substantially coaxial cable grommet at the cable outlet opening of the housing.
Die Kabeltülle sichert dabei unter allen Betriebsbedingungen einen relativ kleinen Biegewinkel des Kabels an der Austrittsöffnung des Gehäuses und verhindert damit ein scharfes Abknicken des Kabels bei entsprechenden auf das Kabel wirkenden Kräften. Dadurch wird das Kabel im Bereich der Ummantelung durch die Kabeltülle vor Beschädigung durch extremes Biegen und auch vor anderen mechanischen Einwirkungen geschützt.The cable grommet ensures under all operating conditions a relatively small bending angle of the cable at the outlet opening of the housing and thus prevents a sharp kinking of the cable with corresponding forces acting on the cable forces. As a result, the cable in the area of the sheathing is protected by the cable grommet against damage caused by extreme bending and also against other mechanical influences.
Beim Betrieb der Handwerkzeugmaschine wird üblicherweise die Kühlluft desDuring operation of the power tool usually the cooling air of the
Elektromotors durch Einlassöffnungen von außen in das Gehäuse gesaugt, am Motor vorbei und durch Auslassöffnungen wieder nach außen geblasen. Dadurch entsteht im Gehäuse Unterdruck, der dazu führt, dass in entsprechenden Bereichen durch alle vorhanden Öffnungen und Spalte Luft von außen in das Gehäuse einströmt, auch durch den Spalt zwischen Kabel und Kabeltülle. DieserElectric motor sucked through inlet openings from the outside into the housing, past the engine and blown out through outlet openings to the outside. This creates negative pressure in the housing, which causes air to flow from the outside into the housing in corresponding areas through all the openings and gaps present, including through the gap between the cable and the cable grommet. This
Spalt besteht wegen relativ grober Fertigungstoleranzen der Kabel und der Kabeltülle und wegen der Verwendung nur weniger Kabeltüllentypen für eine Vielzahl von Kabeln unterschiedlicher Außendurchmesser, die wegen weltweit unterschiedlicher Netzspannungen erforderlich sind. Aus diesem Grund sind zurzeit mehrere Kabeltüllentypen mit unterschiedlichem Innendurchmesser notwendig.Gap is due to relatively rough manufacturing tolerances of the cable and the cable grommet and because of the use of only a few types of cable glands for a variety of cables of different outer diameter, which are required because of different global grid voltages. That's why currently several types of cable glands with different inner diameters necessary.
Die durch die Kabeltülle angesaugte Luft fördert Staubpartikel aus der Arbeitsumgebung in das Innere der Handwerkzeugmaschine. Diese Staubpartikel sind z.B. beim Einsatz eines Winkelschleifers häufig metallisch und können sich im Inneren des Gehäuses an Schaltern oder anderen elektrischen, spannungsführenden Elementen ablagern. Dadurch kann es zu Brückenbildungen der leitenden metallischen Partikel zwischen den unterschiedlichen Spannungspotenzialen kommen. Entsprechende Überschläge können zu Ausfällen der Handwerkzeugmaschine führen und den Bedienenden gefährden.The sucked through the cable grommet air promotes dust particles from the working environment into the interior of the power tool. These dust particles are e.g. When using an angle grinder often metallic and can be deposited inside the housing to switches or other electrical, live elements. This can lead to bridging of the conductive metallic particles between the different voltage potentials. Corresponding arcing can lead to failures of the power tool and endanger the operator.
Offenbarung der ErfindungDisclosure of the invention
Vorteile der ErfindungAdvantages of the invention
Die Erfindung mit den Merkmalen des Patentanspruchs 1 kann je nach Gestaltung der Außen- und/oder Innenform der Kabeltülle als Abdichtung und als Toleranzausgleich dienen. Dadurch muss nicht für jede Länderausführung derThe invention with the features of claim 1 may serve as a seal and as a tolerance compensation depending on the design of the outer and / or inner shape of the cable grommet. This does not mean that for each country version of the
Handwerkzeugmaschine ein eigener Kabeltüllentyp eingesetzt werden und die Teilevielfalt reduziert sich. Außerdem kann die Kabeltülle durch die neue Ausgestaltung zugleich als Netzkabel-Zugentlastung dienen.Hand tool a separate Kabeltüllentyp be used and the variety of parts is reduced. In addition, the cable grommet can serve at the same time as a power cable strain relief by the new design.
Dadurch, dass die Kabeltülle das Kabel radial abdichtend kraftschlüssig umgreift, kann kein Wasser, Staub und dergl. ins Innere des Gehäuses dringen, insbesondere dadurch, dass die Kabeltülle an ihrer dem Gehäuse zugewandten Seite ein ringartiges Dichtmittel hat, das sich abdichtend auf dem Außenumfang des Kabels abstützt.The fact that the cable grommet surrounds the cable in a radially sealingly frictional manner prevents water, dust and the like from penetrating into the interior of the housing, in particular because the cable grommet has a ring-like sealing means on its side facing the housing, sealingly on the outer circumference of the housing Cable supported.
Dadurch, dass die Kabeltülle mit einer spiralförmigen, nach innen weisende radialen Dichtlippe versehen ist, kann das Kabel in eine enge Kabeltülle durch schraubenartiges Drehen axial eingeführt werden. Dadurch, dass die Kabeltülle an ihrer dem Gehäuse zugewandten Seite mehrere ringartige Dichtmittel aufweist, wird die Dichtwirkung verbessert.Characterized in that the cable grommet is provided with a spiral, inwardly facing radial sealing lip, the cable can be inserted axially into a narrow cable grommet by screw-turning. Because the cable grommet has a plurality of annular sealing means on its side facing the housing, the sealing effect is improved.
Dadurch, dass die ringartigen Dichtmittel als Ringwulst ausgestaltet sind, insbesondere in Gestalt eingespritzter O- Ringe aus einem anderen, insbesondere weichelastischerem, als dem Werkstoff der Tülle bestehend, kann die Dichtwirkung verbessert und die Herstellung der Kabeltülle vereinfacht werden.The fact that the ring-like sealing means are configured as annular bead, in particular in the form of injected O-rings of another, especially soft-elastic than the material of the spout, the sealing effect can be improved and the production of the cable grommet can be simplified.
Dadurch, dass die ringartigen Dichtmittel als hohlzylindrischer Stopfen, insbesondere Keilstopfen, ausgestaltet sind, die in den Hohlzylinder der Kabeltülle ragen, insbesondere an deren Frontseite, kann die Dichtwirkung für besondere Umstände und Spezialanwendungen verbessert werden.Characterized in that the annular sealing means are designed as a hollow cylindrical plug, in particular wedge plug, which protrude into the hollow cylinder of the grommet, in particular on the front side, the sealing effect for special circumstances and special applications can be improved.
Dadurch, dass die Kabeltülle mit einem glattzylindrischen Hohlstutzen axial insThe fact that the cable grommet with a smooth cylindrical hollow socket axially into
Innere des Gehäuses ragt und dort in Montagelage kontrahierend umgriffen wird, so dass sich ein Bereich des Hohlstutzens ringartig abdichtend außen auf dem Kabel abstützt, ist eine weitere einfach montierbare Abdichtvariante geschaffen.Inner of the housing protrudes and there is contracted encompassing in mounting position, so that a portion of the hollow nozzle is supported on the outside ring-like sealing outside, another easy-to-install Abdichtvariante is created.
Dadurch, dass der Hohlstutzen von klemmbackenartigen Teilen, insbesondere zum Gehäuse gehörenden Teilen, beaufschlagbar ist, können auch konventionelle Kabeltüllen abdichtend verwendet werden.Due to the fact that the hollow socket can be acted upon by clamping jaw-like parts, in particular parts belonging to the housing, conventional cable grommets can also be used sealingly.
Dadurch, dass das Gehäuse aus Gehäusehalbschalen besteht, von denen jede ein klemmbackenartiges Teil hat, das zu je einer Gehäusehalbschale gehört, kann die Dichtwirkung mit einfachsten Mitteln verbessert werden.Characterized in that the housing consists of housing halves, each of which has a jaw-like part that belongs to a respective housing half shell, the sealing effect can be improved with the simplest means.
Dadurch, dass der Hohlstutzen von einem, insbesondere zum Gehäuse gehörenden, ringschellenartigen Teil radial beaufschlagbar ist, kann die Dichtwirkung mit weiter vereinfachten Mitteln verbessert werden.Due to the fact that the hollow stub can be radially acted on by a ring-clamp-like part belonging in particular to the housing, the sealing effect can be improved with further simplified means.
Dadurch, dass das ringschellenartigen Teil als Zugschlinge, insbesondere als verdrillbarer Draht und/oder als Rohrschelle und/oder als Kabelbinder ausgestaltet ist, kann die Dichtwirkung mit weiter vereinfachten, herkömmlichen kostengünstigen Mitteln verbessert werden.Characterized in that the ring clamp-like part as a drawstring, in particular as a twistable wire and / or as a pipe clamp and / or as a cable tie is configured, the sealing effect can be improved with further simplified, conventional inexpensive means.
Zeichnungdrawing
Nachstehend ist die Erfindung anhand eines Ausführungsbeispiels mit zugehöriger Zeichnung näher erläutert.The invention is explained in more detail with reference to an embodiment with associated drawing.
Es zeigen: Figur 1 und Bild 2 einen Längsschnitt eines Handwerkzeugmaschinengehäuses mit der erfindungsgemäßen Kabeltülle und Kabel,1 and 2 a longitudinal section of a portable power tool housing with the cable grommet and cable according to the invention,
Figur 3 die Kabeltülle nach Fig. 1 und 2 im Längsschnitt als Einzelheit,3 shows the cable grommet according to FIGS. 1 and 2 in longitudinal section as a detail,
Figur 4 eine weitere Kabeltülle mit spiraliger, radialer Innendichtlippe,FIG. 4 shows a further cable bushing with a spiral, radial inner sealing lip,
Figur 5 und 6 je eine Variante der Kabeltülle mit mehreren radialen Innendichtlippen,FIGS. 5 and 6 each show a variant of the cable grommet with a plurality of radial inner sealing lips,
Figur 7 eine Kabeltülle mit hohlzylindrischem Stopfen als Dichtmittel,FIG. 7 shows a cable grommet with a hollow cylindrical stopper as a sealant,
Figur 8 eine Kabeltülle mit Quetschbereich und als Dichtmittel beaufschlagt von Klemmbacken,FIG. 8 shows a grommet with a pinch area and acted as a sealing means by clamping jaws,
Figur 9 eine Kabeltülle mit Quetschbereich und als Dichtmittel beaufschlagt von einem ringschellenartigen Teil.Figure 9 shows a cable grommet with pinch and acted as a sealant of a ring clamp-like part.
Beschreibung des AusführungsbeispielsDescription of the embodiment
Eine in den Figuren 1, 2 und 3 gezeigte Kabeltülle 22 hat an ihrer gehäuseinneren Fontseite 30 eine ringförmig umlaufende, nach innen weisende radiale Dichtlippe 28, die ein eingezogenes Kabel 36 elastisch pressend umgreift und somit axial abdichtet, wobei der Hohlzylinder 26 eine zu seiner Endseite 32 hin dünner werdende, konische Wand hat, die das Kabel 36 umgreift und nach außen hin panzernd verstärkt. Der im Bereich der Frontseite 30 deutlich dickere Wandbereich nimmt ein höheres Biegemoment auf als näher der Endseite 32 und verhindert damit bei hohen auf das Kabel 36 wirkenden Biegekräften ein scharfes Abknicken des Kabels 36 gegenüber der Längsachse 24 des Gehäuses 10, - d.h. um einen spitzen Winkel von etwa 90° mit minimalem Biegeradius - und verhindert damit das Brechen der Kabellitzen im Inneren des Kabels 36.A cable grommet 22 shown in Figures 1, 2 and 3 has on its inner side Fontseite 30 an annular circumferential, inwardly facing radial sealing lip 28 which surrounds a retracted cable 36 elastically pressing and thus axially seals, the hollow cylinder 26 a to its end side 32 has thinning towards conical wall, which surrounds the cable 36 and after Reinforced outside panzernd. The significantly thicker wall area in the area of the front side 30 absorbs a higher bending moment than nearer the end side 32 and thus prevents a sharp bending of the cable 36 with respect to the longitudinal axis 24 of the housing 10 at high bending forces acting on the cable 36, ie at an acute angle of about 90 ° with a minimum bending radius - and thus prevents the breaking of the cable strands inside the cable 36.
Außen ist die Kabeltülle 22 herkömmlich gestaltet und mit einer äußeren Ringnut 34 einem passenden Ring- Vorsprung 16 des Gehäuses 10 sowie mit seiner Frontseite 30 einem rippenartigen Axialanschlag 18 des Gehäuses 10 fixierbar zugeordnet. Die Gehäusewand von 10, 12 bildet eine die Kabeltülle 22 umgreifende Kabeltüllenaustrittsöffnung 14, durch die die Kabeltülle 22 nach außen ragt und dabei innen das Kabel 36 führt.Outside the cable grommet 22 is conventionally designed and associated with an outer annular groove 34 a matching ring projection 16 of the housing 10 and with its front side 30 a rib-like axial stop 18 of the housing 10 fixed. The housing wall of 10, 12 forms a cable grommet 22 embracing cable grommet opening 14, through which the cable grommet 22 protrudes to the outside, while the cable 36 leads inside.
Die Dicht-, Einführ- und Auszugseigenschaften der Kabel gegenüber derThe sealing, insertion and extraction properties of the cable compared to
Kabeltülle 22 sind über die Gestaltung ihrer Winkel im Bereich der Dichtlippe wählbar. Hat die Dichtlippe 28, wie in Figur 3 abgebildet, eine Sägezahnstruktur, kann von einer relativ geringen, montagefreundlichen Kabeleinzugskraft gegenüber einer höheren Auszugskraft der Kabeltülle 22 ausgegangen werden. Das unterstützt die Zugentlastung. Hierzu können auch korrespondierende Nuten oder Nocken am Kabel 36 angebracht werden.Cable grommet 22 can be selected via the design of their angle in the region of the sealing lip. If the sealing lip 28, as shown in FIG. 3, has a sawtooth structure, it can be assumed that the cable grommet 22 will have a relatively low, easy-to-install cable retraction force compared to a higher pull-out force. This supports the strain relief. For this purpose, corresponding grooves or cams on the cable 36 can be attached.
Figur 4 zeigt eine Kabeltülle 220 mit einer spiralförmigen, nach innen weisenden radialen Dichtlippe 280, die für eine Verwendung bei Kabeln unterschiedlicher Durchmesser abgestufte Innendurchmesser haben kann. Dabei können beiFigure 4 shows a cable grommet 220 having a helical, inwardly facing radial sealing lip 280 which may have graduated inner diameters for use with cables of different diameters. It can at
Verwendung der Kabeltülle 220 für große Kabeldurchmesser zu enge Dichtlippen mechanisch, thermisch oder anderweitig entfernbar sein. Das Kabel 36 wird bei diesem Prinzip, wie eine Schraube in das Muttergewinde, in die Kabeltülle 220 gedreht. Hier sind Materialkombinationen einer einteilig hergestellten Kabeltülle 220 zwischen dem konventionellen Tüllenbereich und dem Dichtbereich möglich.Use of cable grommet 220 for large cable diameters to tight sealing lips be mechanically, thermally or otherwise removable. The cable 36 is rotated in the cable grommet 220 in this principle, such as a screw in the nut thread. Here material combinations of a one-piece cable grommet 220 between the conventional spout area and the sealing area are possible.
Bei einer Variante der Kabeltülle 220 mit spiralförmiger, abgestufter Dichtlippe, näher einem elastischeren bzw. dehnbareren Bereich des Hohlzylinders 260, ist ein Entfernen zu großer Dichtlippen nicht nötig, weil diese mit dem Hohlzylinder 260 bzw. dessen Wand radial nach außen ausweichen können.In a variant of the cable grommet 220 with a spiral, stepped sealing lip, closer to a more elastic or stretchable region of the hollow cylinder 260, is a removal to large sealing lips not necessary because they can dodge radially outward with the hollow cylinder 260 and its wall.
Die in den Figuren 5 und 6 gezeigten Kabeltüllen 2200, 22000 haben je zwei parallele, radiale innere Dichtlippen 2800, 28000 aus integrierten Ringwülsten bzw. aus O- Ringen aus gleichem oder unterschiedlichem Werkstoffs wie die Kabeltüllen. Diese können ebenso wie die spiralförmige Dichtlippe nach Figur 4 für unterschiedlich starke Kabel je einen unterschiedlichen Innendurchmesser haben, wobei für stärkere Kabel zu enge Dichtlippen mechanisch, thermisch oder anderweitig entfernbar sein können. Ein eingezogenes Kabel wird nach demThe cable bushings 2200, 22000 shown in FIGS. 5 and 6 each have two parallel, radial inner sealing lips 2800, 28000 of integrated annular beads or of O-rings of the same or different material as the cable sleeves. These, like the spiral-shaped sealing lip according to FIG. 4, may each have a different inner diameter for cables of different thicknesses, wherein for thicker cables, too narrow sealing lips may be mechanically, thermally or otherwise removable. A retracted cable will after the
Wirkprinzips eines O- Rings dichtend elastisch umschlossen. Andere Formen der Ringwülste wie z.B. Rechteck, Quadrat, Ellipse und/oder unterschiedliche Werkstoffe einer einstückigen Kabeltülle für den herkömmlichen Tüllenbereich und den Dichtbereich kommen ebenfalls infrage.Operating principle of an O-ring sealingly enclosed. Other forms of annular beads, such as e.g. Rectangle, square, ellipse and / or different materials of a one-piece cable grommet for the conventional spout area and the sealing area are also suitable.
Der Vorteil dieser Variante ist die Wählbarkeit einer geeigneten Größe der O- Ringe, auch eine breite Materialwahl für das dichtende Element ist möglich. Eine Ausführung der Dichtungsquerschnitte als Rechteck, Quadrat, Ellipse- Sägezahn usw. kann auch bei diesen Kabeltüllen von Vorteil sein.The advantage of this variant is the selectability of a suitable size of the O-rings, also a wide choice of material for the sealing element is possible. An embodiment of the sealing cross sections as a rectangle, square, ellipse sawtooth, etc. may also be advantageous in these cable grommets.
Die in Figur 7 dargestellte Kabeltülle 221 trägt an ihrer Frontseite 303 ein elastisches, hohlzylindrisches Keilelement 281, das innen in den Hohlzylinder 263 der Kabeltülle 221 gepresst und entsprechend fixiert gehalten wird, z.B. durch Reibschluss, einen mechanischen Hinterschnitt, eine Rippe am Gehäuse oder Klebstoff. Durch die Pressung schiebt sich das Keilelement dichtend in den zuvor vorhandenen Spalt zwischen Keilelement und nichtdargestelltem Kabel. Eine weitere Variante einer einteilig hergestellten Kabeltülle nach dem Muster von Figur 7 mit integrierten Konus ist nicht dargestellt.The cable grommet 221 shown in FIG. 7 carries on its front side 303 an elastic, hollow-cylindrical wedge element 281, which is pressed inside the hollow cylinder 263 of the cable grommet 221 and held fixed accordingly, e.g. by friction, a mechanical undercut, a rib on the housing or adhesive. As a result of the pressure, the wedge element pushes sealingly into the previously existing gap between wedge element and cable (not shown). Another variant of a cable grommet produced in one piece according to the pattern of FIG. 7 with integrated cone is not shown.
Die in Figur 8 dargestellte Kabeltülle 222 hat an ihrer Frontseite 302 einen vorspringenden, rohrstutzenartigen Bereich 29 kleiner Wandstärke. Dieser Bereich 29 entwickelt seine Dichtfunktion gegenüber einem eingelegten Kabel, sobald er radial von außen von einer Kraft beaufschlagt wird. Dazu sind in die beide Halbschalen 12 des Gehäuses 10 gegenüberliegende Rippen 13 integriert, die bei der Montage der Halbschalen 12 den Bereich 13 von außen zangenartig querschnittsverengend verformen und ein Abdichtung gegenüber dem eingelegten Kabel schaffen. Alternativ können auch mehrere Rippen hintereinander und von der einen Halbschale zu der anderen Halbschale seitlich gegeneinander versetzt werden. Durch diese Maßnahme könnte, durch die zusätzliche Verformung der Netzleitung wie eine Zugentlastung wirken.The cable grommet 222 shown in Figure 8 has on its front side 302 a projecting, pipe socket-like portion 29 of small wall thickness. This area 29 develops its sealing function with respect to an inserted cable as soon as it is acted on radially from the outside by a force. For this purpose, 10 opposing ribs 13 are integrated into the two half-shells 12 of the housing, in the assembly of the half-shells 12, the region 13 from the outside pincer-like cross-section narrowing deform and create a seal against the inserted cable. Alternatively, a plurality of ribs can be laterally offset from one another and from one half-shell to the other half-shell against each other. This measure could act as a strain relief by the additional deformation of the power line.
Die in Figur 9 dargestellte Kabeltülle 223 hat an ihrer Frontseite 303 einen vorspringenden, rohrstutzenartigen Bereich 291 kleiner Wandstärke wie die Kabeltülle gemäß Figur 8. Dieser Bereich 291 entwickelt seine Dichtfunktion gegenüber einem eingelegten Kabel, sobald er radial von außen von einer Kraft beaufschlagt wird. Dazu ist ein Quetschelement 11 vorgesehen, das den Bereich 13 von außen querschnittsverengend verformt und eine Abdichtung gegenüber einem eingelegten Kabel schafft. Als Quetschelement kommen z.B. ein verdrillbarer Draht, eine Rohrschelle, ein Kabelbinder oder ähnliche Mittel infrage.The cable grommet 223 shown in Figure 9 has on its front side 303 a projecting, pipe socket-like portion 291 small wall thickness as the cable grommet according to Figure 8. This area 291 develops its sealing function against an inserted cable as soon as it is acted upon radially from the outside by a force. For this purpose, a squeezing element 11 is provided, which deforms the region 13 from the outside querschnittsverengend and creates a seal against an inserted cable. As squeezing element, e.g. a twistable wire, a pipe clamp, a cable tie or similar means in question.
Durch Pressung und Verengung der Tülle von außen zur Netzleitung hin wird bei diesem Prinzip die Dichtigkeit erreicht. Ein weiterer Vorteil ist die Möglichkeit einer Vorkonfektionierung der als Einheit ausgestalteten Tülle mit Kabel.By pressing and narrowing the grommet from the outside to the power line towards this principle, the tightness is achieved. Another advantage is the possibility of prefabrication of the designed as a unit spout with cable.
Darüberhinaus wäre durch Verkleben der Kabeltülle mit dem Kabel eine dichte und zugentlastende Kabeleinführung gebildet. Auch eine Ausschäumung des Zwischenraumes zwischen der Kabeltülle und dem Kabel mit entsprechendem Schaumstoff ist für eine dauerhafte und dichte Verbindung denkbar. Als weitere Variante ist eine an das Kabel anvulkanisierte Kabeltülle vorgesehen und/oder das Kabel wird mit der Kabeltülle umspritzt bzw. die Kabeltülle wird als elastischeMoreover, by gluing the cable grommet with the cable a dense and zugentlastende cable entry would be formed. A foaming of the space between the cable grommet and the cable with the appropriate foam is conceivable for a permanent and tight connection. As a further variant, a vulcanized to the cable grommet is provided and / or the cable is overmolded with the cable grommet or the cable grommet is as elastic
Schrumpfmuffe ausgeführt.Shrink sleeve executed.
Die genannten Kabeltüllen-Prinzipien sind teilweise miteinander kombinierbar. Dadurch ergeben sich weitere Varianten. Entsprechende Dichtungselemente können über die gesamte Länge der Kabeltülle im Hohlzylinder 26 angeordnet sein, gestaltungsabhängig vom Fertigungs- und Montageverfahren.The cable grommet principles mentioned are partially combinable. This results in more variants. Corresponding sealing elements can be arranged over the entire length of the cable grommet in the hollow cylinder 26, depending on the design of the manufacturing and assembly process.
In weiteren Varianten können die Kabeltüllen zwecks leichterer Montage auch mehrteilig oder halbschalig ausgestaltet sein. In further variants, the cable grommets can also be configured in several parts or half-shell for ease of assembly.

Claims

Ansprüche claims
1. Kabeltülle (22) zum Führen eines Kabels (36) in seinem Eintritts- und Austrittsbereich (14) eines Handwerkzeugmaschinengehäuses (10), die mit ihrem gehäuseseitigen Ende in fixierbarer Verbindung, insbesondere formschlüssig, mit dem Gehäuse (10) steht, dadurch gekennzeichnet, dass die Kabeltülle (22), vorzugsweise radiale, Dichtmittel (28) aufweist, die abdichtend mit dem Kabel (36) und/oder dem Gehäuse (10) korrespondieren.1. cable grommet (22) for guiding a cable (36) in its inlet and outlet region (14) of a hand tool housing (10), which is in a fixable connection, in particular form-fitting, with the housing (10) with its housing-side end, characterized in that the cable bushing (22), preferably radial, has sealing means (28) which sealingly correspond to the cable (36) and / or the housing (10).
2. Kabeltülle nach Anspruch 1, dadurch gekennzeichnet, dass sie das Kabel (36) radial abdichtend kraftschlüssig umgreift.2. cable grommet according to claim 1, characterized in that it surrounds the cable (36) radially sealingly non-positively.
3. Kabeltülle nach Anspruch 2, dadurch gekennzeichnet, dass sie an ihrer dem Gehäuse (10) zugewandten Seite ein ringartiges Dichtmittel (28) hat, das sich abdichtend auf dem Außenumfang des Kabels (36) abstützt.3. cable grommet according to claim 2, characterized in that it has on its the housing (10) side facing a ring-like sealant (28) which sealingly on the outer circumference of the cable (36) is supported.
4. Kabeltülle nach Anspruch 1, 2, oder 3, dadurch gekennzeichnet, dass die Kabeltülle (220) mit einer spiralförmigen, nach innen weisende radialen Dichtlippe (280) versehen ist.4. cable grommet according to claim 1, 2, or 3, characterized in that the cable grommet (220) with a spiral, inwardly facing radial sealing lip (280) is provided.
5. Kabeltülle nach Anspruch 3, dadurch gekennzeichnet, dass sie an ihrer dem5. cable grommet according to claim 3, characterized in that it at its the
Gehäuse (10) zugewandten Seite mehrere ringartige Dichtmittel (28) aufweist.Housing (10) facing side has a plurality of annular sealing means (28).
6. Kabeltülle nach Anspruch 4, dadurch gekennzeichnet, dass die ringartigen Dichtmittel (28) als Ringwulst (2800) ausgestaltet sind, insbesondere in Gestalt eingespritzter O- Ringe (28000) aus einem anderen, insbesondere weichelastischerem, als dem Werkstoff der Tülle bestehend.6. grommet according to claim 4, characterized in that the annular sealing means (28) are designed as annular bead (2800), in particular in the form of injected O-rings (28000) from another, in particular weichelastischerem, as the material of the spout.
7. Kabeltülle nach Anspruch 1, 2 oder 3, dadurch gekennzeichnet, dass die ringartigen Dichtmittel als hohlzylindrischer Stopfen (281), insbesondere Keilstopfen, ausgestaltet sind, die in den Hohlzylinder (261) der Kabeltülle (221) ragen, insbesondere an deren Frontseite (301).7. cable grommet according to claim 1, 2 or 3, characterized in that the annular sealing means as a hollow cylindrical plug (281), in particular Wedge plug, are configured, which protrude into the hollow cylinder (261) of the cable grommet (221), in particular on the front side (301).
8. Kabeltülle nach Anspruch 1, dadurch gekennzeichnet, dass diese mit einem glattzylindrischen Hohlstutzen (29) axial ins Innere des Gehäuses (10) ragt und dort in Montagelage kontrahierend umgriffen wird, so dass sich ein Bereich des Hohlstutzens (29) ringartig abdichtend außen auf dem Kabel (36) abstützt.8. grommet according to claim 1, characterized in that this with a smooth cylindrical hollow pipe (29) projects axially into the interior of the housing (10) and there is contracted in mounting position, so that a portion of the hollow nozzle (29) sealingly outside on the cable (36) is supported.
9. Kabeltülle nach Anspruch 1, dadurch gekennzeichnet, dass der Hohlstutzen (29) von klemmbackenartigen Teilen (13), insbesondere zum Gehäuse gehörenden9. cable grommet according to claim 1, characterized in that the hollow socket (29) of jaw-like parts (13), in particular belonging to the housing
Teilen, beaufschlagbar ist.Share, can be acted upon.
10. Kabeltülle nach Anspruch 1, dadurch gekennzeichnet, dass das Gehäuse (10) aus Gehäusehalbschalen (12) besteht, von denen jede ein klemmbackenartiges Teil (13) hat, das zu je einer Gehäusehalbschale (12) gehört.10. cable grommet according to claim 1, characterized in that the housing (10) consists of housing half-shells (12), each of which has a jaw-like part (13) belonging to a respective housing half shell (12).
11. Kabeltülle nach Anspruch 1, dadurch gekennzeichnet, dass der Hohlstutzen (291) von einem, insbesondere zum Gehäuse (10) gehörenden, ringschellenartigen Teil (11) radial beaufschlagbar ist.11. cable grommet according to claim 1, characterized in that the hollow socket (291) of a, in particular to the housing (10) belonging, ring clamp-like part (11) is radially acted upon.
12. Kabeltülle nach Anspruch 1, dadurch gekennzeichnet, dass das ringschellenartigen Teil (11) als Zugschlinge, insbesondere als verdrillbarer Draht und/oder als Rohrschelle und/oder als Kabelbinder ausgestaltet ist. 12. cable grommet according to claim 1, characterized in that the ring clamp-like part (11) is designed as a drawstring, in particular as a twistable wire and / or as a pipe clamp and / or as a cable tie.
EP09769055A 2008-06-24 2009-04-24 Cable sleeve for a hand-held tool Withdrawn EP2303517A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008002616A DE102008002616A1 (en) 2008-06-24 2008-06-24 Cable grommet for hand tool
PCT/EP2009/054965 WO2009156206A1 (en) 2008-06-24 2009-04-24 Cable sleeve for a hand-held tool

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EP2303517A1 true EP2303517A1 (en) 2011-04-06

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US (1) US8822845B2 (en)
EP (1) EP2303517A1 (en)
CN (1) CN102076467B (en)
DE (1) DE102008002616A1 (en)
RU (1) RU2534700C2 (en)
WO (1) WO2009156206A1 (en)

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CN102076467A (en) 2011-05-25
US20110100708A1 (en) 2011-05-05
US8822845B2 (en) 2014-09-02
DE102008002616A1 (en) 2009-12-31
RU2534700C2 (en) 2014-12-10
CN102076467B (en) 2014-12-24
WO2009156206A1 (en) 2009-12-30
RU2011101777A (en) 2012-07-27

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