EP3482879B1 - Walze mit funktioneller oberfläche für elektrisches werkzeug, und mit einer solchen walze ausgestattetes elektrisches werkzeug - Google Patents

Walze mit funktioneller oberfläche für elektrisches werkzeug, und mit einer solchen walze ausgestattetes elektrisches werkzeug Download PDF

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Publication number
EP3482879B1
EP3482879B1 EP18205101.1A EP18205101A EP3482879B1 EP 3482879 B1 EP3482879 B1 EP 3482879B1 EP 18205101 A EP18205101 A EP 18205101A EP 3482879 B1 EP3482879 B1 EP 3482879B1
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EP
European Patent Office
Prior art keywords
roller
hub
shaft
power tool
ribs
Prior art date
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Active
Application number
EP18205101.1A
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English (en)
French (fr)
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EP3482879A1 (de
Inventor
Christophe Hurel
Nicolas Gervais
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Far Group Europe
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Far Group Europe
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D13/00—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor
    • B24D13/02—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor acting by their periphery
    • B24D13/12—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor acting by their periphery comprising assemblies of felted or spongy material, e.g. felt, steel wool, foamed latex
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D13/00—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor
    • B24D13/02—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor acting by their periphery

Definitions

  • the invention relates to the field of electric tools using a cylindrical functional element such as a roller or a brush, the cylindrical functional element being capable of being removably mounted on a rotary shaft of the tool.
  • the invention will be more particularly described with regard to a portable or non-portable surface renovation device, without however being limited thereto. It applies to any electrical device/tool provided with an elongated rotary shaft and on which a functional element/an elongated accessory is intended to be removably mounted so as to ensure its rotation, the functional element having a DIY functional outer surface.
  • a surface renovation device is also referred to as surface renovator.
  • the surface renovator is a tool used to strip, brush, renovate surfaces, such as wooden or metal surfaces, using a rotating cylindrical element such as a brush or a rotating roller.
  • roller is understood to mean any roller, brush, cylindrical element having a functional external surface, such as an active friction surface which is adapted to the type of surface to be renovated.
  • an active friction surface of the roller can be based on felt, or on abrasive paper (with a continuous surface or in the form of strips), or even provided with brush bristles made of plastic or metal, etc.
  • a roller surface renovation tool comprises, in known manner, a body housing electric drive means of the electric motor type, and the distal end of which forms gripping means, and transversely to the body, an elongated rotary shaft on which is removably mounted at least one rotary cylindrical renovation element of the roller type, the roller being rotatable in rotation via the rotary shaft driven by the electric drive means; a safety casing is generally also provided to partly cover the roller at a distance.
  • the roller has a longitudinal central recess forming a hub
  • the shaft of the tool is provided with two opposite grooves
  • two added longitudinal keys are provided which are of complementary shape to the grooves to be inserted into said grooves of the shaft when the hub of the roller is associated with the shaft.
  • the mounting of a roller is done as follows: the hub of the roller is threaded on and around the shaft until it comes into abutment near the proximal end of the shaft (body side of the tool), then the two keys are slid into the grooves, which secures the roller to the shaft, and finally a washer and a clamping screw are fixed on the free end of the shaft to lock the roller in position .
  • This removable attachment design has drawbacks. In particular, it is not so quick to implement, because it requires putting the keys in place and then bolting the end of the shaft. In addition, the keys are added parts that can easily be misplaced during dismantling.
  • the washer and the clamping screw are sufficient by lateral compression to block the hub around the shaft, as for the roller described in the patent application US 2011/0021119 .
  • this attachment is only suitable when only one roller is mounted on the shaft. Indeed, for large-area renovators, it is necessary to mount two consecutive rollers on the shaft, and lateral compression by bolting on the free end of the shaft is insufficient to secure the two rollers to the shaft. . In the latter case, keys are essential.
  • the object of the invention is therefore to overcome in particular the aforementioned drawbacks by providing an electric tool with rotary drive of a roller, which makes it possible to be easy and quick to fit and remove on the tool, regardless of the type of roller with a metal or plastic hub, and the number of rollers to be mounted consecutively on the same shaft, while guaranteeing efficient securing of the roller to the shaft of the the tool.
  • the invention therefore relates to an electric tool equipped with such a roller, in particular a roller surface renovation device.
  • the term “electric roller tool” is understood to mean an electric tool capable of rotating a functional element of cylindrical shape to carry out a do-it-yourself task.
  • the invention thus relates to claim 1.
  • inner face of the central part means the face intended to be in direct contact with a rotary shaft of the tool on which the hub is intended to be mounted.
  • the means of cooperation by mutual engagement are means integrated into the body of the hub.
  • Integrated means is understood to mean means which form a one-piece assembly (preferably irremovable) when the roll is produced, a unitary assembly with the body to which they are attached, unlike added means which are independent.
  • the means of cooperation by mutual engagement form an integral part of the body of the roller when the roller is produced. Consequently, the roller is marketed with said male means of cooperation by mutual engagement integrated into the body of the roller in order to mount the roller on the tool by directly securing the roller without requiring the addition of independent fixing parts.
  • the male means are irremovable.
  • the principle of securing the roller to the shaft of the tool is simpler to implement and faster compared to the system of the prior art, and advantageously makes it possible to dispense with keys, avoiding any risk in particular to lose them for the user.
  • the means of cooperation by mutual engagement extend longitudinally to the hollow central part of the hub, in particular all along the hollow part while being set back (inwardly hollow) relative to the edges of the hub .
  • the male means of cooperation by mutual engagement comprise two diametrically opposed longitudinal ribs projecting (radially) from the inner face towards the hollow interior of the central part of the hub.
  • the central part of the hub with the engagement cooperation means mutual and the rest of the body of the hub form a one-piece plastic assembly, in particular manufactured by molding.
  • the hub comprises a peripheral part which envelops and is integral with the central part, the peripheral part being made of metal while the central part is made of plastic material, preferably manufactured by molding and glued to the peripheral part made of metal.
  • the hub (the body of the hub) may include recesses in its thickness.
  • the recesses extend longitudinally to the body of the hub and open outwards at the two opposite (lateral) ends of the hub.
  • the roller has a functional outer surface forming an active friction surface, in particular for surface renovation such as based on synthetic and/or metallic fibers, or abrasive paper.
  • the tool comprises locking means ensuring that the roller is held in position, in particular lateral clamping means such as by bolting which are arranged at the free end of the shaft once said at least one roller is in position. on the tree.
  • the locking means can be associated with the cooperation means by mutual engagement (male and/or female), providing a clipping function.
  • lateral in the following description, the qualifier with respect to a plane transverse to the longitudinal axis of the roller or the shaft of the tool.
  • the shaft of the tool comprises two diametrically opposite longitudinal grooves
  • said at least one roller comprises two opposite longitudinal ribs (symmetrically with respect to the longitudinal axis of the hub) as male means of cooperation by mutual engagement, which cooperate with (are engaged in) respectively the two opposite grooves of the shaft.
  • the rotary drive electric tool 1 of the invention illustrated in the figures 1 and 2 is an electric tool with roller 2 allowing the roller 2 to be driven in rotation at high speed, provided with a functional surface 20.
  • this tool is a surface renovator, the roller 2 presenting its functional surface 20 as an active renovation surface.
  • the figure 1 has been simplified by not designing the protective casing, which is usually placed at a distance and above the roller for this type of tool, in order to hide the roller from the user to prevent him from receiving dust from pickling during roller operation.
  • the tool 1 comprises at least one slender body 10 housing electrical rotary drive means such as an electric motor and constituting by one of its distal ends 11 a means for gripping the tool, and a shaft 12 ( figures 2 and 3 ) opposite the end 11 and adapted to be driven in rotation by the motor.
  • the shaft 12 extends transversely to the slender body 10. It is elongated and comprises means of cooperation for mounting/securing the roller, which are formed by two longitudinal grooves 13A and 13B symmetrically opposite with respect to the longitudinal axis of the shaft.
  • Tool 1 comprises at least one roller 2 removably mounted on shaft 12.
  • the tool generally comprises two rollers mounted consecutively on the shaft.
  • Roller 2 presents its active renovation surface 20 on the entire periphery of its cylindrical body, this surface being made of a material suitable for the type of surface to be renovated.
  • Roller 2 is intended to be changed when its active surface 20 is worn.
  • the roller 2 comprises a hub 3 allowing said roller to be threaded onto the shaft 12.
  • the hub 3 comprises integrated means 30A, 30B of mutual cooperation, in this case male means, which cooperate directly by mutual engagement with means of cooperation integrated into the shaft 12, in this case with the grooves 13A and 13B of the shaft.
  • the means of cooperation by mutual engagement 30A, 30B of the roller and the means of cooperation 13A, 13B of the shaft are of complementary shape.
  • the means of mutual cooperation 30A, 30B and 13A, 13B make it possible to secure the roller 2 to the shaft 12.
  • the tool 1 comprises clamping means 4 ( figure 1 ), such as a washer 40 and a nut 41, which are screwed onto the free end 12A of the shaft via a bore 12B, thus compressing the roller 2 laterally.
  • the male means 30A, 30B are arranged on the inner face 3' of the hollow longitudinal central part 31.
  • the roller 2 and therefore the hub 3 have a length for example of 100 or 200 mm.
  • the tool has two rollers 2 abutting at one of their side faces.
  • the figure 4A and 6A respectively illustrate two types 2A and 2B of roller according to the invention, the material(s) constituting the hub 3 being different depending on the material of the active surface 20.
  • the first type of roller 2A is a roller whose hub 3 is made of a one-piece body entirely of plastic material comprising a hollow cylindrical central part 31 ( figures 4A, 4B and 5 ), while the active surface 20 is made of synthetic fibers or strips of sandpaper, the fibers or the strips being directly bonded to the plastic outer surface 31A of the hub.
  • roller 2B ( figures 6A, 6B and 7 ) is a roller which has an active surface 20 made of metal fibres/filaments, while the hub 3 is in two parts, a first hollow cylindrical central part 32 ( figure 6B ) which is made of plastic, and a second part or peripheral part 33 ( figures 6A and 7 ) which envelops the central part 32 and is made of metal, the metal fibers being in particular fixed by crimping on the outer surface 33A of the second part 33.
  • the peripheral part 33 constitutes a hollow metal cylinder of homogeneous smooth internal surface 33B without protrusion against which the external surface 32A of the central part 32 is glued.
  • the male cooperation means 30A, 30B for mounting the roller are arranged on the inner face 3' of the central part 32.
  • the central part 31, 32 of each type of hub 3 is therefore made of plastic material, and comprises/integrates the ribs 30A and 30B on its inner face 3' intended to cooperate directly with the shaft of the tool.
  • the male means are molded with the central part.
  • the figure 4B shows the embodiment of the hub 3 whose body is entirely molded in plastic material; the diameter of the hub 3 made entirely of plastic material is for example of the order of 50 mm.
  • the body advantageously has in its thickness over the entire length of the cylindrical body, between its central part 31 and its outer surface 31A, recesses 34.
  • the recesses 34 make it possible to save in manufacturing material cost, and weigh less the weight of the roller, participating in a better rotary training.
  • These recesses are arranged symmetrically with respect to the longitudinal axis of the cylindrical body of the hub.
  • the figure 8 illustrates an alternative embodiment of the hub 3 in plastic material with recesses 34 of different shape.
  • the central part 32 As for the metal-based hub 3 ( figures 6A, 6B and 7 ), once the central part 32 made of plastic material has been manufactured as illustrated in the figure 6B , the latter is secured by its outer surface 32A to the interior 33B of the metal cylinder of the peripheral part 33, for example by gluing.
  • the thickness e of the central part 32 ( figure 6B ) can be reduced, for example of the order of 1.5 mm.
  • the diameter of the central part is for example of the order of 22 mm.
  • the central part 32 therefore constitutes a cylindrical interface part integrated into the hub and provided with cooperation ribs 30A and 30B with the shaft of the tool.
  • each central part 31, 32 of the hub 3 therefore comprises two longitudinal ribs 30A, 30B diametrically opposite facing each other towards the hollow interior of said central part.
  • the shape of the ribs 30A and 30B has a form of mutual cooperation with that of the grooves 13A and 13B of the shaft 12.
  • the grooves 13A and 13B of the shaft have a U-section.
  • the hub 3 of the roller of the invention therefore has male shapes (ribs 30A and 30B) to cooperate with the female shapes (grooves 13A and 13B) of the shaft 12; this embodiment effectively makes it possible to cooperate with the rotary shafts existing on the market which are usually provided with female shapes.
  • the ribs 30A and 30B of the central part 31, 32 of each hub are obtained by molding the body 30 or the central part 32 in plastic material.
  • the dimensions of the ribs 30A and 30B are designed so that the ribs cooperate with the grooves 13A and 13B according to a slight clearance, preferably of the order of 0.4 mm for each rib/groove.
  • the ribs 30A and 30B preferably extend along the entire length of the hub 3.
  • the ribs 30A and 30B of the central part 32 ( figure 6B ) which are therefore internal to the cylindrical body do not protrude with respect to the side faces/end edges 35 of said central part 32 in order to avoid, if on the contrary they were flush with the edges, any risk of friction between the ribs of two faces side facing two respective rollers which would be butted to each other, to ensure a rotational drive without hindrance of the two rollers.
  • the ribs 30A and 30B are set back towards the inside of the hub with respect to each edge/side face 35.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rolls And Other Rotary Bodies (AREA)
  • Portable Nailing Machines And Staplers (AREA)

Claims (9)

  1. Elektrowerkzeug (1) mit einem Drehfunktionselement (2) einer Rollenart, insbesondere einer Art mit Oberflächenerneuerungsfunktion, das eine langgestreckte Welle (12) mit einem Drehantrieb, die mit zwei diametral gegenüberliegenden Längsnuten (13A, 13B) zum Montieren auf ablösbare Weise mindestens einer Rolle ausgerüstet ist, und mindestens eine Rolle (2) mit einer Funktionsoberfläche (20) aufweist, die eine Nabe (3) aufweist, die einen hohlen Mittelteil (31, 32), der den Montageteil der Rolle ausmacht, auf der Welle des Werkzeugs aufweist, dadurch gekennzeichnet, dass der hohle Mittelteil (31, 32) der Nabe der Rolle zwei Längsrippen (30A, 30B) eines Zusammenwirkens durch gegenseitiges Eingreifen aufweist, die diametral gegenüberliegend sind, die sich in Längsrichtung zu dem hohlen Mittelteil (31, 32) der Nabe erstrecken und durch direkte Berührung in die Längsnuten (13A, 13B) der Welle des Werkzeugs eingreifen.
  2. Elektrowerkzeug nach Anspruch 1, dadurch gekennzeichnet, dass die Rippen (30A, 30B) sich entlang des gesamten hohlen Teils erstrecken, während sie relativ zu den Kanten (35) der Nabe zurückgesetzt sind.
  3. Elektrowerkzeug nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass die Rippen (30A, 30B) in den Körper der Nabe eingebunden sind, indem sie nach einem Herstellen der Rolle eine einstückige Anordnung ausbilden.
  4. Elektrowerkzeug nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass der Mittelteil (31) der Nabe mit den Rippen (30A, 30B) und der Rest des Körpers der Nabe eine einstückige Anordnung aus Kunststoffmaterial ausbilden, insbesondere durch Gießen hergestellt.
  5. Elektrowerkzeug nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die Nabe (3) der Rolle einen Umfangsteil (33) aufweist, der den Mittelteil (32) umgibt und mit diesem fest verbunden ist, wobei der Umfangsteil (33) aus Metall ist, wohingegen der Mittelteil (32) aus Kunststoffmaterial, bevorzugt durch Gießen hergestellt, und mit dem Umfangteil aus Metall verklebt ist.
  6. Elektrowerkzeug nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass die Nabe (3) der Rolle in ihrer Dicke Aussparungen (34) aufweist.
  7. Elektrowerkzeug nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass die Rolle (2) eine äußere Funktionsoberfläche (20) vorweist, die eine aktive Reiboberfläche ausbildet, insbesondere für eine Oberflächenerneuerung wie zum Beispiel auf Basis von Kunst- und/oder Metallfasern oder Schleifpapier.
  8. Elektrowerkzeug nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass es Verriegelungsmittel (4) aufweist, die das Halten der Rolle in Position sicherstellen, insbesondere seitliche Klemmmittel (40, 41) wie zum Beispiel durch Verschrauben, die an dem freien Ende der Welle (12A) eingerichtet sind, sobald die mindestens eine Rolle auf der Welle in Position ist.
  9. Verwendung einer Rolle (2) mit Funktionsoberfläche (20), die auf einem Elektrowerkzeug (1) ablösbar angebracht ist, nach Anspruch 1, die mit einer langgestreckten Welle (12) mit Drehantrieb ausgerüstet ist, die mit zwei diametral gegenüberliegenden Längsnuten (13A, 13B) ausgerüstet ist, wobei die Rolle eine Nabe (3) aufweist, die einen hohlen Mittelteil (31, 32), der den Montageteil der Rolle ausmacht, auf der Welle des Werkzeugs aufweist, und die Rolle mit männlichen Mitteln des Zusammenwirkens durch gegenseitiges Eingreifen (30A, 30B) vermarktet wird, die zwei Längsrippen (30A, 30B) des Zusammenwirkens durch gegenseitiges Eingreifen ausbilden, die diametral gegenüberliegend sind und sich in Längsrichtung zu dem hohlen Mittelteil (31, 32) erstrecken, wobei die Rolle angepasst ist, um auf der Welle des Werkzeugs montiert zu werden, damit die zwei Längsrippen (30A, 30B) durch direkte Berührung in die zwei Längsnuten (13A, 13B) der Welle des Werkzeugs eingreifen.
EP18205101.1A 2017-11-09 2018-11-08 Walze mit funktioneller oberfläche für elektrisches werkzeug, und mit einer solchen walze ausgestattetes elektrisches werkzeug Active EP3482879B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1771184A FR3073166B1 (fr) 2017-11-09 2017-11-09 Rouleau a surface fonctionnelle pour outil electrique et outil electrique dote d'un tel rouleau

Publications (2)

Publication Number Publication Date
EP3482879A1 EP3482879A1 (de) 2019-05-15
EP3482879B1 true EP3482879B1 (de) 2022-12-28

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EP18205101.1A Active EP3482879B1 (de) 2017-11-09 2018-11-08 Walze mit funktioneller oberfläche für elektrisches werkzeug, und mit einer solchen walze ausgestattetes elektrisches werkzeug

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FR (1) FR3073166B1 (de)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050153639A1 (en) * 2004-01-12 2005-07-14 Belanger Industrial Products, Inc. Flap-type rotary finishing device

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3056986A (en) * 1958-07-18 1962-10-09 Osborn Mfg Co Reinforced brush construction
DE102006017305A1 (de) * 2006-04-12 2007-10-18 Gerd Eisenblätter Gmbh Befestigungssystem, Befestigungsadapter und Befestigungsverfahren
US8197309B2 (en) * 2009-07-22 2012-06-12 Chung-Han Lee Grinding wheel assembly

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050153639A1 (en) * 2004-01-12 2005-07-14 Belanger Industrial Products, Inc. Flap-type rotary finishing device

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Publication number Publication date
FR3073166A1 (fr) 2019-05-10
FR3073166B1 (fr) 2019-12-20
EP3482879A1 (de) 2019-05-15

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