EP3442747B1 - Machine-outil portative comprenant un dispositif de recouvrement - Google Patents

Machine-outil portative comprenant un dispositif de recouvrement Download PDF

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Publication number
EP3442747B1
EP3442747B1 EP17717141.0A EP17717141A EP3442747B1 EP 3442747 B1 EP3442747 B1 EP 3442747B1 EP 17717141 A EP17717141 A EP 17717141A EP 3442747 B1 EP3442747 B1 EP 3442747B1
Authority
EP
European Patent Office
Prior art keywords
covering device
tool
working direction
machine housing
main working
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
EP17717141.0A
Other languages
German (de)
English (en)
Other versions
EP3442747A1 (fr
Inventor
Philipp Eisenmann
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.)
Festool GmbH
Original Assignee
Festool 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 Festool GmbH filed Critical Festool GmbH
Priority to EP23214443.6A priority Critical patent/EP4309844A3/fr
Publication of EP3442747A1 publication Critical patent/EP3442747A1/fr
Application granted granted Critical
Publication of EP3442747B1 publication Critical patent/EP3442747B1/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
    • B24B23/00—Portable grinding machines, e.g. hand-guided; Accessories therefor
    • B24B23/005—Auxiliary devices used in connection with portable grinding machines, e.g. holders
    • 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
    • B24B23/046—Clamping or tensioning means for abrasive sheets
    • 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
    • B24B23/04—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
    • B24B55/00—Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
    • B24B55/04—Protective covers for the grinding wheel
    • B24B55/05—Protective covers for the grinding wheel specially designed for portable grinding machines

Definitions

  • the invention relates to a hand-held machine tool with a plate tool, in particular a grinding plate or polishing plate, and a drive motor arranged in a machine housing for driving the plate tool to an oscillatory and/or rotating and/or eccentric movement of a processing surface of the plate tool, according to the preamble of the claim 1.
  • a hand machine tool of this type is out DE 10 2008 059 585 A1 known, which forms the basis for the preamble of claim 1.
  • a covering device according to e.g DE 20 2005 009 030 A1 is provided by the applicant, for example, as a plug-in component, which can be plugged into the machine housing if necessary and then covers the side surfaces of the plate tool in the main working direction and the at least one transverse working direction.
  • the plate tool then does not hit obstacles with its side surfaces, but is covered by the protective wall of the covering device.
  • obstacles in particular the workpiece itself, can no longer damage the side surfaces, for example due to shock loads, abrasive or the like, and on the other hand, the usually sensitive side surfaces of the plate tool are also protected.
  • the plate tool generally includes a cushion or pad on which an abrasive or polishing agent is arranged.
  • the protective wall therefore protects both the plate tool and the workpiece. However, if the plate tool is required for edge-side processing of the workpiece surface, the operator has to remove the covering device again, which is cumbersome.
  • a hand-held machine tool is provided according to the technical teaching of claim 1.
  • the approach according to the invention therefore provides that the at least one protective wall itself covers and protects the at least one side surface of the plate tool, but there is still a recess for working in the main working direction and / or at least one transverse working direction, through which the plate tool is, so to speak, out of the covering device cantilevered or protrudes through the covering device, so that the protruding side edge region of the plate tool and therefore the processing surface on this side edge region is available for edge-side processing of the workpiece surface.
  • the plate tool with the protruding side edge area can be carefully guided by the operator up to a baseboard, side wall or the like in order to also process the workpiece surface there in an abrasive, polishing or similar manner.
  • the processing surface projects, for example, in the area of the at least one recess beyond a projection of the covering device onto the workpiece surface.
  • processing surface of the plate tool in the area of the at least one recess protrudes in front of an imaginary connecting line between opposite end faces of the protective wall at the recess.
  • the plate tool with a side edge region protrudes freely in front of an outer circumferential contour of the covering device in the area of the processing surface
  • the plate tool with a side edge region protrudes freely in front of an envelope of the covering device in the area of the processing surface
  • the envelope is an envelope in the sense of a geometric envelope.
  • the at least one recess is, for example, a U-shaped or V-shaped cutout from the at least one protective wall or includes such a cutout.
  • Only a single recess can be provided on the at least one protective wall. However, it is also possible for several recesses to be provided, particularly arranged next to one another in a row direction.
  • the recesses can, for example, have a sawtooth-like structure. It is also possible for the recesses to be defined by a wavy contour. Furthermore, the recesses between tooth-like, in particular Rectangular tooth-like sections of the at least one protective wall or the protective wall as a whole can be provided.
  • the covering device can form a covering hood which at least partially covers the plate tool on a side opposite to the processing surface.
  • the hand machine tool could also be called a polishing machine or grinding machine. Since different plate tools, namely grinding tools or polishing tools, or at least corresponding processing surfaces on the plate tools can be provided on the hand-held machine tool, the hand-held machine tool can be used for grinding or polishing. If the plate tool or its processing surface is replaceable, the hand-held machine tool can expediently be converted for both grinding and polishing.
  • the drive motor is, for example, an electric motor or a pneumatic motor.
  • the hand-held machine tool can be driven with electrical energy or pneumatic energy or compressed air.
  • the hand-held machine tool preferably has an interface for a mobile electrical energy storage device, in particular a battery pack.
  • the machine tool can also be mains-operated, i.e. it has at least one network interface for connection to an electrical or pneumatic supply network.
  • the plate tool is preferably plate-shaped.
  • the plate tool or the hand-held machine tool advantageously has a carrier plate.
  • the carrier plate is expediently essentially rigid and/or consists of metal and/or plastic.
  • the carrier plate can have ribbing or other stiffening structure.
  • the carrier plate can be firmly connected to an output of the drive motor or a gearbox driven by the drive motor.
  • the carrier plate can even form the output of the gearbox or drive motor.
  • the carrier plate expediently has a holding surface corresponding to the processing surface for an abrasive or polishing agent, for example sandpaper, a polishing or abrasive fabric or the like.
  • a cushion or pad for an abrasive or polishing agent can also be provided on the carrier plate.
  • the plate tool or a support plate for the plate tool expediently has a cushion or pad.
  • An adhesive layer or Velcro layer for attaching an abrasive or polishing agent for example a sandpaper, a sanding pad, a polishing agent or the like, is expediently arranged on the cushion or pad. This means it can be easily replaced if it wears out. It is also possible for the pad or pad to have polishing agents, abrasives or the like integral to its processing surface.
  • the at least one protective wall of the covering device extends to the processing surface. It is therefore advantageous if only the processing surface or a narrow area above the processing surface, for example of approximately 1 mm, 2 mm or 3 mm, projects freely in front of the protective wall of the covering device.
  • the at least one protective wall of the covering device completely or substantially covers the side flanks of the plate tool up to the processing surface.
  • the at least one protective wall of the covering device completely or essentially covers a cushion or pad of the plate tool, which is intended for or has an abrasive or polishing agent, for example sandpaper.
  • the plate tool can at least partially form an integral part of the hand-held machine tool. Therefore, for example, the carrier plate and/or the cushion or pad can be firmly connected to the hand-held machine tool, for example screwed, glued or the like.
  • the plate tool it is also possible for the plate tool to be detachably attachable to a tool holder of the hand-held machine tool.
  • the plate tool can be easily replaced if it wears out or in the event that another plate tool is needed.
  • bayonet contours, screw means, plug-in contours or the like are provided on the tool holder for releasably attaching the plate tool to the tool holder.
  • the plate tool has corresponding counter contours, for example bayonet counter contours, a push-through opening for a screw, etc.
  • the plate tool projects freely backwards through a free section of the covering device, counter to the main working direction. It is therefore provided that the protective wall or protective walls cover the plate tool laterally in relation to the main working direction and preferably also in relation to the at least one transverse working direction, but not to the rear.
  • a relatively large rear edge region of the processing surface of the plate tool is available, in the manner explained at the beginning, for edge-side processing of the workpiece surface.
  • edge section of the processing surface that protrudes through the at least one recess on the at least one protective wall of the covering device.
  • the covering device does not or does not completely cover a rear section of the plate tool with respect to the main working direction, for example its rear end face, rear narrow side or the like.
  • the covering device does not cover the plate tool at the rear transversely to the main working direction, in particular over its entire transverse width transversely to the main working direction.
  • a plate tool having, for example, a rectangular processing surface is not covered by the covering device on its rear transverse narrow side or transverse front side.
  • the processing surface is, for example, a triangle leg that is arranged at the rear in the working direction and is not covered by the covering device.
  • a rear section of the machine housing with respect to the main working direction, in particular a handle section, and/or a suction connection for dust air to protrude backwards over the processing surface of the plate tool counter to the main working direction.
  • this rear section or, for example, a suction pipe for dust air which can be connected to a suction hose, hinders or prevents edge-side use of the processing surface of the plate tool, the at least one recess provided according to the invention ensures that the edge section or corner region of the processing surface protruding through the protective wall is available for edge processing of the workpiece surface.
  • the covering device can be detached from the hand-held machine tool or from the machine housing if necessary.
  • the covering device can be attached to the machine housing without tools and/or can be removed from the machine housing without tools.
  • the covering device can be releasably attached to the machine housing using fastening means.
  • the fastening means can include, for example, locking means and/or clamping means and/or at least one plug-in receptacle.
  • the fastening means can easily also include a catch and/or a clamp and/or a screw or the like.
  • a preferred exemplary embodiment provides that the fastening means include a plug-in receptacle on the machine housing for plugging in the covering device.
  • the plug-in receptacle expediently comprises a plug-in guide or plug-in contours which guide and/or hold the covering device in a form-fitting manner transversely to a plug-in direction along which it can be plugged into the machine housing.
  • the covering device can be locked to the machine housing using locking means or a locking device.
  • the latching device comprises, for example, at least one latching projection and at least one latching receptacle, into which the at least one latching projection engages in a latching position.
  • the covering device is designed in the manner of a clasp or clamp, the side legs of which clasp the machine housing on opposite sides. These opposing sides are assigned, for example, to the at least one transverse working direction.
  • a base leg of the clasp or clamp rests on a front side of the machine housing facing the main working direction when the clasp or clamp is attached to the machine housing.
  • the side legs of the clamp or clasp expediently have locking means, for example locking projections or locking receptacles, which are intended for locking with the machine housing.
  • locking means for example locking projections or locking receptacles, which are intended for locking with the machine housing.
  • Complementary locking means i.e. locking receptacles or locking projections, are expediently provided on the machine housing.
  • the locking means are expediently provided at free end regions of the side legs of the covering device.
  • the clip forms, for example, a clamping means.
  • Side legs of the clamp expediently have a tension towards one another and can be expanded or deflected away from one another for fastening to the machine housing.
  • the side legs of the clamp or clasp can be deflected away from each other for fastening to the machine housing.
  • the clamp or clasp can be expanded, so to speak, so that it can be attached to the machine housing.
  • the side legs are then preferably resiliently preloaded and/or have a tension towards one another, so that, for example, the aforementioned locking means, in particular at free end regions of the side legs, can come into locking engagement with complementary locking means of the machine housing.
  • the locking is not absolutely necessary in this embodiment.
  • the clamp it is possible for the clamp to be held, for example, in a clamp fit on the machine housing.
  • At least one form-fitting contour is expediently provided on a base leg of the covering device for form-fitting engagement with a counter-form-fitting contour of the machine housing.
  • the form-fitting contour is used, for example, to mount the covering device on the machine housing with the correct rotation angle.
  • the form-fitting contour can also represent a coding, so that only a covering device that matches the machine housing can be attached to the machine housing.
  • a corresponding receiving coding formed by the counter-positive contour is then provided on the machine housing for coding the covering device.
  • the plate tool can, for example, have a polygonal processing surface.
  • the processing surface is essentially triangular or rectangular.
  • the hand-held machine tool can be a so-called rectangular grinder or triangular grinder, at least when it is equipped with the corresponding grinding plate or polishing plate or other plate tool is equipped with the aforementioned triangular processing surface. It should be mentioned at this point that a plate tool with an approximately triangular processing surface can also have rounded or rounded outer edges.
  • the invention can also be easily used with round, especially circular, plate tools.
  • the plate tool or its processing surface or both can, for example, be circular, elliptical, oval or the like.
  • the geometry of the enveloping or outer peripheral contour of the covering device in the area of the processing surface expediently corresponds approximately to the geometry of the outer peripheral contour of the processing surface, except in the area of the at least one recess.
  • the envelope or outer circumferential contour of the covering device is expediently also triangular in the case of a triangular plate tool or a triangular processing surface, in the case of a round processing surface it is also round, in particular circular, elliptical or oval, and in the case of a rectangular processing surface it is expediently also rectangular.
  • a gear is arranged between the drive motor and the plate tool for generating an eccentric and/or oscillatory and/or hypercycloidal and/or rotating drive movement of the plate tool, the transmission expediently being switchable between at least two of the aforementioned types of movement.
  • the rotating movement can be a movement rotating exclusively about one axis.
  • a hypercycloid rotary movement is also possible, i.e. superimposed rotary movements of the plate tool.
  • the hand-held machine tool has at least one rotary stop, which a rotational movement of the plate tool is limited laterally.
  • the rotary stop can, for example, be a component of the transmission or a separate device.
  • the non-circular plate tools in particular polygonal plate tools, can expediently be driven eccentrically and/or oscillatorily by the drive motor using the gear arranged between the drive motor and the plate tool.
  • the transmission is expediently switchable so that it can be switched between at least two types of movement, for example from an eccentric operation to a rotational operation or the like.
  • the at least one protective wall covers the plate tool with respect to the main working direction or is positioned frontally in front of the plate tool.
  • the operator can therefore work forward, i.e. in the main working direction, so to speak, without any worries, because the at least one protective wall may abut against an obstacle in front of the hand-held machine tool, while the at least one recess is provided to the side of it.
  • the plate tool prefferably has an outer circumferential contour or surface geometry that is exclusively polygonal and/or not suitable for a rotating movement of more than 30°, in particular more than 40°. Nevertheless, it is possible for, for example, a corner region of the processing surface to be accommodated in the at least one recess, in particular in an oscillatory manner.
  • the at least one protective wall or a section thereof expediently forms the frontmost or frontal section of the hand-held machine tool.
  • the protective wall may therefore come into contact with an obstacle located at the front of the hand-held machine tool in relation to the main working direction.
  • a section of the protective wall or the protective wall as a whole is therefore expediently present at the front in relation to the main working direction.
  • at least one corner region of the processing surface expediently protrudes through the at least one recess in front of the outer peripheral contour of the covering device.
  • a forward-facing section of the processing surface is available for edge-side processing of the workpiece surface.
  • the corner area expediently has at least one side edge which runs at right angles transversely to the main working direction.
  • the processing surface is rectangular and a front side edge of the processing surface runs transversely to the main working direction. This front side edge is covered by at least a section of the protective wall and is not covered on at least one side.
  • Particularly preferred is an arrangement in which a corner region of the processing surface protrudes in addition to the section of the protective wall that covers the front in the main working direction.
  • the protective wall is therefore arranged between recesses through which a corner region of the processing surface protrudes.
  • a corner or a tip of the processing surface may protrude forward through the at least one recess in the covering device in the main working direction.
  • the at least one protective wall extends to the side of the corner or tip and protects the side surface of the plate tool.
  • the processing surface is triangular and a front corner region of the processing surface projects in the manner of a tip or corner.
  • the operator only has to exercise a certain degree of caution when moving in the main working direction so that the side surface of the plate tool does not hit obstacles, while across the main working direction, in at least one transverse working direction, the protective wall or sections of the protective wall cover the plate tool and thus protect it.
  • the machine housing does not hinder work in the direction of the main working direction or the at least one transverse working direction or both, for example by not protruding in front of an outer peripheral contour of the covering device and/or the processing surface of the plate tool.
  • the machine housing therefore does not come into contact with obstacles when the hand-held machine tool moves in the direction of the main working direction or the at least one transverse working direction.
  • the plate tool and the covering device protrude in the main working direction and/or the at least one transverse working direction in front of the machine housing or a projection of the machine housing onto the workpiece surface or the processing surface.
  • the cover device forms, so to speak, the front side of the hand-held machine tool in the area of the processing surface, while in the at least one recess the plate tool with its side edge region forms, so to speak, the frontal outer region of the hand-held machine tool.
  • the machine housing can, for example, have a handle section. It is preferred if a handle element is firmly connected to the machine housing or is in one piece. For example, the handle section or the handle element can be grasped with one hand of the operator.
  • the handle section or the handle element expediently has a palm rest.
  • a particularly rod-shaped handle element can be mounted in an articulated manner with the machine housing using a joint arrangement, for example a joint arrangement with one or more pivot bearings.
  • the machine housing can thus pivot about one or more pivot axes relative to the handle element, for example based on the joint arrangement.
  • the hand-held machine tool can be a wall grinder or ceiling grinder.
  • the covering device expediently has one or more passage openings.
  • the passage openings can be arranged in one or more rows be arranged next to each other. It is particularly preferred if at least one passage opening or a row arrangement of at least two passage openings is arranged on the longitudinal sides of the covering device, in particular parallel to the main working direction or at a small angle obliquely to the main working direction.
  • the at least one passage opening is preferably arranged on an upper side of the covering device.
  • the plate tool in particular its carrier plate, is visible through the at least one passage opening.
  • the carrier plate or the plate tool is visible in particular from above through the cover device.
  • the at least one passage opening can also serve to allow external air to flow into the area of the plate tool.
  • the external air can preferably be extracted at a suction connection on the hand-held machine tool.
  • a hand-held machine tool 10 has a machine housing 11 in which a drive motor 12 for driving a plate tool 30 is arranged. Between the drive motor 12 and the plate tool 30, a gear 14, for example an eccentric gear, a gear for generating a hypercycloid movement of the plate tool 30 relative to the machine housing 11 or the like can be provided.
  • the plate tool 30 is arranged, for example, on an output 13 of the transmission 14.
  • the transmission 14 can also cause a speed reduction or other change in speed between the output of the drive motor 12 and its output 13.
  • the machine housing 11 can be gripped on a handle section 15, for example grasped with one hand, with a drive switch 16 for switching the drive motor 12 on and off being present on a front region of the handle section 15.
  • the drive motor 12 in turn is arranged in a drive section 17 of the machine housing 11.
  • the plate tool 30 is arranged on a base region 18 of the machine housing 11 that is remote from the handle section 15, at the bottom of the drawing in the drive section 17.
  • a processing surface 31 of the plate tool 30 a workpiece surface O of a workpiece W can be processed, for example as part of grinding or polishing.
  • the operator can grasp the hand-held machine tool 10, for example by the handle section 15, and thus guide the plate tool 30 with its processing surface 31 over the workpiece surface O, for example directly forward in a main working direction HA or also transversely to the side with respect to the main working direction HA to the right in one Transverse working direction QR and to the left in a transverse working direction QL.
  • circular movements on the workpiece surface O are also easily possible.
  • a processing surface can be provided in one piece on the processing surface 31, for example a coating with a corresponding grain size, an abrasive cloth or the like.
  • a holding means for example a Velcro holding means, an adhesive layer or the like, is provided in the area of the processing surface 31 in order to hold a sanding sheet or other abrasive means 40, for example an abrasive fabric, which then provides the actual processing surface 31.
  • the processing surface 31 can therefore be formed by a replaceable abrasive or polishing agent.
  • the workpiece surface O can be sanded using the abrasive 40.
  • a polishing disk or similar other polishing agent for example a polishing fabric, would also be readily possible.
  • a suction chamber 19 which is not visible in the drawing, is provided within the machine housing 11 and is fluidly connected to a suction connection 21 of the machine housing 11. Via the suction connection 21, dust or similar other particles generated by workpiece machining can be sucked out of the area of the plate tool 30, which for this purpose has, for example, lateral inflow openings 32 and inflow openings (shown schematically) that communicate with its underside.
  • the plate tool 30 is at least partially firmly connected to the output 13, namely to a carrier plate 33.
  • the output 13 it would also be possible for the output 13 to have a tool holder, for example with bayonet contours, a screw holder or the like, on which the carrier plate 33 can be releasably attached.
  • a cushion 34 for example a pad, is arranged on a holding surface 35 of the carrier plate 33.
  • the cushion is made of elastic material, for example foam, rubber or the like.
  • the cushion 34 is, for example, screwed, glued or otherwise firmly connected to the carrier plate 33, but is preferably replaceable.
  • the abrasive 40 on the other hand, can be attached to a fastening surface 36 of the cushion 34, for example Velcro fasteners or the like, can be releasably attached, ie easily replaced in the event of wear or other quality requirements.
  • the plate tool 30 projects with a section 37 to the front with respect to the main working direction HA, with sections 38 to the side with respect to the transverse working directions QR and QL and with a section 39 to the rear against the main working direction HA in front of an outer circumferential contour 20 of the machine housing in the area of the plate tool 30.
  • the plate tool 30 is thus exposed, so to speak, which is in Figure 1 illustrated state of the hand-held machine tool 10 facilitates edge-side processing of the workpiece surface O.
  • the section 37 projects, for example, in front of a front side 22 of the machine housing 11, the sections 38 protrude to the side, in front of transverse sides 23 of the machine housing 11.
  • the rear section 38 is protected in a certain way by the suction connection 21, but still protrudes from a rear side 24 of the machine housing 11.
  • the plate tool 30 can be moved forward with its processing surface 31 in the main working direction HA up to an obstacle HV protruding in front of the workpiece surface O until it hits the obstacle HV with its front side surface 47.
  • the plate tool 30 can also be moved to the side, in the transverse working directions QR and QL, towards such obstacles HR or HL until it hits this obstacle HR or HL with its lateral side surfaces 48.
  • edge-side processing is easily possible, so that the processing surface 31 until the plate tool 30 hits with a rear side surface 49 against an obstacle HH in front of the workpiece surface O, for example a skirting board or the like , can be introduced.
  • the operator will generally want to avoid such impact in order not to damage the sensitive side flanks of the plate tool 30 and the obstacles themselves.
  • the elastic cushion 34 and also the narrow sides of the abrasive 40 are sensitive and at HV, HR or HL can be damaged if it hits such an obstacle.
  • the narrow sides of the carrier plate 33 which preferably consists of a rigid material, in particular a hard plastic, metal, can damage the obstacle HV, HR or HL.
  • the processing surface 31 of the plate tool 30 has a polygonal, in this case rectangular shape, with straight corner areas 41 of the plate tool 30, which have corners 43 or outer corners in relation to the main working direction HA and the transverse working directions QR and QL, exposed and therefore special are at risk of hitting obstacles.
  • the plate tool 130 has, for example, a substantially triangular processing surface 131 and a likewise substantially triangular support plate 133, on which a triangular cushion 134 is held.
  • a hand machine tool 210 according to Figures 5 and 6 With a round plate tool 230, a similar problem arises in that the respective plate tool 130, 230 collides tangentially with obstacles and is thereby damaged itself or the obstacle HV, HR or HL is damaged or both.
  • Both a forwardly projecting section 137, as well as side sections 138 and a rear section 139 protrude in front of the projection of the machine housing 11 onto the workpiece surface O, and are therefore exposed.
  • the protruding section 137 forms a tip 143 or a pointed region 141, which projects exposed forward in the direction of the main working direction HA in front of the machine housing 11 or its front side 22.
  • Side surfaces 248 of the plate tool 130 run from the tip region 141 to the rear section 139, on which a rear, front side surface 149 is present.
  • the side surfaces 148, 149 can be easily damaged when they come into contact with obstacles that, for example, protrude in front of the workpiece surface O.
  • the plate tool 230 has a substantially round, circular outer contour and processing surface 231. Also round, in particular circular, are a support plate 233 of the processing tool or plate tool 230 and a cushion 234, which is arranged on the support plate 233. Although the plate tool 230 is somewhat more compact than the plate tools 30, 130, it is certainly exposed to the machine housing 11 and is endangered by obstacles standing up there, particularly when the workpiece surface O is being processed at the edge.
  • the plate tool 230 projects, for example, forward, with a front section 237, in front of a front side 22 of the machine housing 11.
  • the plate tool 230 also protrudes to the side, so to speak, laterally in front of the transverse sides 23 of the machine housing 11, namely with lateral sections 238.
  • a rear section 239 which projects in front of the back 24 of the machine housing or the outer peripheral contour 20, on the other hand, is arranged essentially protected below the suction connection 21 . Nevertheless, at least the side and front sections 238, 237 of the plate tool 230 are exposed and at risk of hitting obstacles, whereby on the one hand the plate tool 230 and on the other hand the obstacle HV, HR or HL can be damaged.
  • cover devices 60, 160, 260 are provided, which can be attached to the machine housing 11 if necessary in order to cover the plate tool 30, 130, 230.
  • the covering devices 60, 160, 260 have base bodies 61, 161, 261, each of which has a base leg 62, 162, 262, from which side legs 63, 163, 263 and 64, 164, 264 protrude and thus define a receptacle 65, in which the machine housing 11 can be plugged in, so to speak, or - in another formulation - with which the respective cover device 60, 160, 260 can be plugged into the machine housing 11 in an insertion direction E. Then the side legs 63, 163, 263 and 64, 164, 264 lie on the transverse sides 23 and the base legs 62, 162, 262 on the front side 22 of the machine housing 11 on. This makes a plug connection between the cover devices 60, 160, 260 and the machine housing 11 possible.
  • a plug-in receptacle 26 is provided as a component of fastening means 25, which serves to accommodate plug-in projections 66 formed by the side legs 63, 163, 263 and 64, 164, 264.
  • the covering devices 60, 160, 260 are designed in the form of clips 85, which can be attached to the machine housing 11 like a clip.
  • positive-locking contours 67 for example positive-locking receptacles, are provided on the base legs 62, 162, 262, which, when the covering devices 60, 160, 260 are plugged into the machine housing 11, are connected to counterparts. Positive locking contours 27 on the front 22 of the machine housing 11 are engaged.
  • the plug connection between the machine housing 11 and the covering device 60, 160, 260 includes guide receptacles 28 provided on the machine housing 11, into which guide contours 68 protrude inwards towards the receptacle 65.
  • the guide contours 68 engage in a form-fitting manner in the guide receptacles 28 when the respective cover device 60, 160, 260 is attached to the machine housing 11.
  • the covering devices 60, 160, 260 are thus held in a form-fitting manner transversely to the insertion direction E.
  • a stop with respect to the insertion direction E is ensured by a locking means with locking means which have locking projections 69 on the free end regions of the side legs 63, 163, 263 and 64, 164, 264, which are in locking receptacles 29 on the transverse sides 23 of the machine housing 11 or on the longitudinal end regions the guide receptacles 28 engage when the respective cover device 60, 160, 260 is attached to the machine housing 11.
  • Insertion of the locking projections 69 of the cover devices 60, 160, 260 into the plug-in receptacle 26 is facilitated by insertion bevels 74 which are provided on the free end regions of the side legs 63, 163, 263.
  • Releasing the locking projections 69 is expediently facilitated by grip elements 75, which are provided in the area of the locking projections 69 on the side legs 63, 163, 263 and 64, 164, 264.
  • the cover device 60 has a cover wall 70 which, with a cover section 72, covers the carrier plate 33 from the side of the machine housing 11, from above in the drawing, and also has protective walls 77, 78, which can also be referred to as protective wall sections.
  • a wall region 73 protruding like a collar is provided on the cover section 72 and delimits the receptacle 65.
  • the protective wall 77 is located in front of the side surface 47 of the plate tool 30, i.e. in front of the side surface 47 in the main working direction HA, so that it protects it from frontal contact with the obstacle HV.
  • the protective walls 78 are located in front of the side surfaces 48 with respect to the transverse working directions QR and QL, so that they can protect the plate tool 30 from contact with the lateral obstacles HR and HL.
  • a recess 71 is provided between the protective walls 77, 78, through which a corner region 41 of the plate tool 30 is in front of an outer peripheral contour 80, which is not rectangular in the area of the recesses 71. but has corresponding depressions or recesses 81, in which the processing surface 31 is, so to speak, free and without cover to the side for edge-side processing of the workpiece surface O.
  • a side edge area 42 of the processing surface 31 is free up to the side surface 47 and side surface 48 without a front cover by the cover device 60, so that the plate tool 30 with the corner areas 41 comes into direct contact with the obstacle HV or in extreme cases Side with the obstacles HR and HL can be brought.
  • the operator will generally try to process the workpiece surface O with the processing surface 31 in the corner areas 41 without such direct contact with the obstacles HV, HR and HL.
  • a rear area of the processing surface 31 in the main working direction HA is free-standing, namely in the rear section 39. This is not covered by the covering device 60, so that the rear side surface 49 is available for edge-side processing of the workpiece surface O.
  • the section of the handle section 15 which protrudes backwards, over the back 24 of the machine housing 11, and the suction connection 21 underneath, in this case a suction pipe, hinder working towards the rear.
  • the recesses 71 have narrow side walls 79 extending from the protective walls 77, 78 to the cover section 72, between which a narrow side wall 76 extends on the cover section 72. From above, even the carrier plate 33 is visible in the corner regions 41 and thus also the processing surface 31, which extends with the same surface area.
  • the covering device 160 of the hand-held machine tool 110 has a substantially triangular outer peripheral contour 180, in which a recess 181 is provided in the tip region 141.
  • the tip 143 thus projects freely in front of the covering device 160, so that the sections of the side surfaces 148 located in the area of the recess 181 and thus the side edges of these sections of the side surfaces 148 next to the processing surface 131 are freely available for edge or corner processing of the workpiece surface O.
  • the rear section 133 at least the rear side surface 49 and the side edge of the processing surface 131 located there, are also free and are therefore not covered by the covering device 160, so that the rear section 133 of the plate tool 130 is available for edge-side processing of the workpiece surface O.
  • the base body 161 of the cover device 60 has a cover section 172 which covers the plate tool 30 apart from a recess 171 in the area of the tip 143 or the tip area 141.
  • Protective walls 178 which protrude downward from the cover section 172 in front of the side surfaces 143, essentially cover the side surfaces 148 apart from the pointed area 141. This means there is edge protection or side impact protection for the sensitive plate tool 130 or the sensitive obstacles HL, HR and HV that can potentially be damaged by the plate tool.
  • a front cover for example in the manner of the side wall 77 of the covering device 60, is not present.
  • a side edge region 142 of the plate tool 130 stands freely in front of the outer peripheral contour 180.
  • the recess 171 has narrow side walls 179 in the area of the protective walls 178 and a narrow side wall 176 where it adjoins the cover section 172.
  • passage openings 190 are advantageously provided through which, for example, the carrier plate 133 or the plate tool 130 is visible from above.
  • the passage openings 190 can also serve to allow external air to flow in in a targeted manner, which is sucked out at the suction connection 21.
  • the cover device 260 leaves a rear section 239 of the plate tool 260 free.
  • the side sections 238 and the front section 239 are however, essentially covered by the cover device 260.
  • In front of the cover section 271 there is a front protective wall 277 of the cover device 260, which covers the front section 237 of the plate tool 230.
  • recesses 271 are provided through which a side edge region 242 of the plate tool 230 and thus the processing surface 231 protrudes freely.
  • the recesses 271 (only one recess 271 could be provided on one of the side legs 263 or 264) have, for example, narrow side walls 279 in the area of the protective walls 277, 278, between which a narrow side wall 276 extends along the cover section 272.
  • FIG 6 Another exemplary embodiment of an alternative of the covering device 260 is shown, namely a covering device 360.
  • This has, for example, several recesses 371 which are angularly spaced over its outer circumference, through which edge regions of the plate tool 230 protrude freely in front of the outer peripheral contour of this covering device 360 in a manner not specified.

Claims (15)

  1. Machine-outil portative avec un outil à disque (30; 130 ; 230), en particulier un disque de meulage ou un disque de polissage, et un moteur d'entraînement (12) disposé dans un carter de machine (11), destiné à entraîner l'outil à disque (30 ; 130 ; 230) en un mouvement oscillatoire et/ou rotatif et/ou excentrique d'une face d'usinage (31 ; 131 ; 231) de l'outil à disque (30 ; 130 ; 230), dans laquelle la machine-outil portative (10 ; 110 ; 210) peut être guidée vers l'avant le long d'une direction de travail principale (HA) avec la surface d'usinage (31 ; 131 ; 231) et latéralement de manière transversale par rapport à la direction de travail principale (HA) dans au moins une direction de travail transversale (QR, QL) pour un meulage ou polissage d'une surface de pièce (O), dans laquelle la machine-outil portative (10 ; 110 ; 210) présente un dispositif de recouvrement (60 ; 160 ; 260) pour l'outil à disque (30 ; 130 ; 230), qui présente au moins une paroi de protection (77, 78), qui est montée en amont d'au moins une face latérale (47, 48, 49), s'étendant à côté de la face d'usinage (31 ; 131 ; 231), de l'outil à disque (30 ; 130 ; 230) par rapport à la direction de travail principale (HA) et/ou à l'au moins une direction de travail transversale (QR, QL) pour la protection contre un contact avec des obstacles (HV, HR, HL), et dans laquelle l'au moins une paroi de protection (77, 78) présente, par rapport à la direction de travail principale (HA) et/ou à l'au moins une direction de travail transversale (QR, QL), au moins un évidement (71 ; 171 ; 271), par lequel l'outil à disque (30 ; 130 ; 230) dépasse par une zone de bord latéral (42 ; 142 ; 242) librement d'un contour périphérique extérieur (80 ; 180 ; 280) du dispositif de recouvrement (60 ; 160 ; 260) dans la zone de la face d'usinage (31 ; 131 ; 231) de sorte qu'une section de bord ou une zone de coin (41), s'étendant jusqu'à la zone de bord latéral (42 ; 142 ; 242), de la face d'usinage (31 ; 131 ; 231) de l'outil à disque (30 ; 130 ; 230) se tient prête sans entrave par l'au moins une paroi de protection (77, 78) pour un usinage côté bord de la surface de pièce (O), caractérisée en ce que le dispositif de recouvrement (60 ; 160 ; 260) est configuré à la manière d'une attache (85) ou d'un bracelet, dont les branches latérales (63 ; 64) entourent le carter de machine (11) sur des côtés opposés les uns aux autres.
  2. Machine-outil portative selon la revendication 1, caractérisée en ce que l'outil à disque (30 ; 130 ; 230) fait saillie librement par une section libre du dispositif de recouvrement (60 ; 160 ; 260) vers l'arrière dans le sens opposé à la direction de travail principale (HA) et/ou le dispositif de recouvrement (60 ; 160 ; 260) ne recouvre pas une section arrière, par rapport à la direction de travail principale (HA), de l'outil à disque, en particulier son côté frontal ou sa tranche arrière par rapport à la direction de travail principale (HA).
  3. Machine-outil portative selon la revendication 1 ou 2, caractérisée en ce que le dispositif de recouvrement (60 ; 160 ; 260) peut être fixé de manière amovible sur le carter de machine (11) à l'aide de moyens de fixation (25), dans laquelle il est prévu que l'outil à disque (30 ; 130 ; 230) est, lorsque le dispositif de recouvrement (60 ; 160 ; 260) est retiré, sans recouvrement de la totalité de sa périphérie extérieure ou de sa zone de bord latérale, et/ou que les moyens de fixation (25) comprennent un logement d'enfichage (26) sur le carter de machine (11) pour y placer par enfichage le dispositif de recouvrement (60 ; 160 ; 260) et/ou un dispositif d'enclenchement (29, 69) destiné à enclencher le dispositif de recouvrement (60 ; 160 ; 260) au carter de machine (11).
  4. Machine-outil portative selon l'une quelconque des revendications précédentes, caractérisée en ce que le dispositif de recouvrement (60 ; 160 ; 260) peut être fixé sans outil sur le carter de machine (11) et/ou peut être retiré du carter de machine (11).
  5. Machine-outil portative selon l'une quelconque des revendications précédentes, caractérisée en ce que des moyens d'enclenchement destinés à être enclenchés au carter de machine (11) sont présents sur les branches latérales (63 ; 64) de l'attache (85) ou du bracelet et/ou les branches latérales (63 ; 64) peuvent être déviées de manière à s'éloigner l'une de l'autre pour être fixées sur le carter de machine (11) et/ou repose, dans l'état monté sur le carter de machine (11) du dispositif de recouvrement (60 ; 160 ; 260), selon un serrage ajusté sur le carter de machine (11).
  6. Machine-outil portative selon l'une quelconque des revendications précédentes, caractérisée en ce que la face d'usinage (31 ; 131 ; 231) est polygonale, en particulier sensiblement de forme triangulaire ou de forme rectangulaire, ou ronde, en particulier de forme ronde circulaire, et/ou que la face d'usinage (31 ; 131 ; 231) présentent un coin ou une pointe faisant saillie par rapport à la direction de travail principale (HA), qui fait saillie vers l'avant dans la direction de travail principale (HA) par l'au moins un évidement (71 ; 171 ; 271) du dispositif de recouvrement (60 ; 160 ; 260).
  7. Machine-outil portative selon l'une quelconque des revendications précédentes, caractérisée en ce qu'est disposée entre le moteur d'entraînement (12) et l'outil à disque (30 ; 130 ; 230) une transmission (14) destinée à produire un mouvement d'entraînement excentrique et/ou oscillatoire et/ou hypercycloïde et/ou rotatif de l'outil à disque (30 ; 130 ; 230), dans laquelle il est prévu de manière avantageuse que la transmission (14) peut être commutée entre au moins deux des types de mouvement précités et/ou génère exclusivement un mouvement rotatif de l'outil à disque (30 ; 130 ; 32) de 30° au maximum, en particulier de 20° au maximum, de préférence de 10° au maximum, de préférence de 5° au maximum autour d'un axe de rotation stationnaire ou non stationnaire.
  8. Machine-outil portative selon l'une quelconque des revendications précédentes, caractérisée en ce que l'au moins une paroi de protection (77, 78) recouvre l'outil à disque (30 ; 130 ; 230) par rapport à la direction de travail principale (HA), et/ou forme la section la plus en avant par rapport à la direction de travail principale (HA) de la machine-outil portative (10 ; 110 ; 210).
  9. Machine-outil portative selon l'une quelconque des revendications précédentes, caractérisée en ce qu'au moins une zone de coin (41) de la face d'usinage (31 ; 131 ; 231) fait saillie par l'au moins un évidement (71 ; 171 ; 271) devant le contour de périphérie extérieure (80 ; 180 ; 280) du dispositif de recouvrement (60 ; 160 ; 260) latéralement à côté d'une section de la paroi de protection (77, 78) recouvrant côté frontal l'outil à disque (30 ; 130 ; 230) dans la direction de travail principale (HA) ou la section de recouvrement frontal est disposée entre des zones de coin (41), faisant saillie par respectivement un évidement (71 ; 171 ; 271) devant le contour de périphérie extérieure (80 ; 180 ; 280) du dispositif de recouvrement (60 ; 160 ; 260), de la face d'usinage (31 ; 131 ; 231).
  10. Machine-outil portative selon l'une quelconque des revendications précédentes, caractérisée en ce qu'elle présente une plaque de support (33), pouvant être entraînée par le moteur d'entraînement (12), pour l'outil à disque (30 ; 130 ; 230) ou en tant que partie de l'outil à disque (30 ; 130 ; 230), dans laquelle il est prévu de manière avantageuse que la plaque de support (33) présente une face de maintien (35) correspondant à la face d'usinage (31 ; 131 ; 231) pour un moyen de meulage ou de polissage, et/ou un coussin (34) ou un tampon pour un moyen de meulage ou un moyen de polissage, en particulier un papier de meulage, est disposé sur la plaque de support (33).
  11. Machine-outil portative selon l'une quelconque des revendications précédentes, caractérisée en ce que le carter de machine (11) ne fait pas saillie devant un contour de périphérie extérieure (80 ; 180 ; 280) du dispositif de recouvrement (60 ; 160 ; 260) et/ou de la face d'usinage (31 ; 131 ; 231) de l'outil à disque (30 ; 130 ; 230) par rapport à la direction de travail principale (HA) et/ou l'au moins une direction de travail transversale (QR, QL), et/ou qu'un élément de poignée est relié de manière solidaire au carter de machine (11) ou est d'un seul tenant avec le carter de machine (11) ou est disposé de manière articulée à l'aide d'un ensemble d'articulation sur le carter de machine (11).
  12. Machine-outil portative selon l'une quelconque des revendications précédentes, caractérisée en ce que l'au moins un évidement (71) forme un unique évidement du dispositif de recouvrement (60, 160, 260, 360).
  13. Machine-outil portative selon l'une quelconque des revendications 1 à 11, caractérisée en ce que le dispositif de recouvrement (160) présente un ensemble avec deux ou plusieurs évidements (371) disposés côte à côte dans une direction d'alignement et/ou que le dispositif de recouvrement (60 ; 260) présente exclusivement des évidements (71) par rapport aux directions de travail transversales (QR, QL).
  14. Machine-outil portative selon l'une quelconque des revendications précédentes, caractérisée en ce qu'une section arrière, par rapport à la direction de travail principale (HA), du carter de machine (11) et/ou un raccord d'évacuation par aspiration (21) pour de l'air chargé de poussières font saillie vers l'arrière dans le sens opposé à la direction de travail principale (HA) par l'intermédiaire de la face d'usinage (31 ; 131 ; 231) de l'outil à disque (30 ; 130 ; 230), et/ou que l'au moins une paroi de protection (77, 78) du dispositif de recouvrement (60, 160, 260, 360) recouvre en totalité ou sensiblement des flancs latéraux de l'outil à disque (30 ; 130 ; 230) et/ou un coussin (34) ou un tampon de l'outil à disque (30 ; 130 ; 230) pour un moyen de meulage ou un moyen de polissage ou avec un moyen de polissage ou un moyen de meulage jusqu'à la face d'usinage (31 ; 131 ; 231) et/ou s'étend jusqu'à la face d'usinage (31 ; 131 ; 231).
  15. Machine-outil portative selon l'une quelconque des revendications précédentes, caractérisée en ce que le dispositif de recouvrement (60 ; 160 ; 260) présente au moins une ouverture de passage (190, 290) ou un ensemble de plusieurs ouvertures de passage (190, 290), par lesquels l'outil à disque (30 ; 130 ; 230), en particulier une plaque de support (133) de l'outil à disque (30 ; 130 ; 230), est visible et/ou qui sert à faire affluer de l'air extérieur, en particulier à évacuer par aspiration sur un raccord d'évacuation par aspiration (21) de la machine-outil portative, et/ou que l'au moins une paroi de protection (77, 78) du dispositif de recouvrement (60, 160, 260, 360) recouvre l'outil à disque (30 ; 130 ; 230) latéralement par rapport à la direction de travail principale (HA) et/ou par rapport à l'au moins une direction de travail transversale (QR, QL), et ne le recouvre pas vers l'arrière, et/ou que la géométrie de l'enveloppement ou du contour de périphérie extérieure (80) du dispositif de recouvrement (60, 160, 260, 360) correspond, hormis dans la zone de l'au moins un évidement (71 ; 171 ; 271), à la géométrie du contour de périphérie extérieure de la face d'usinage (31 ; 131 ; 231) de l'outil à disque (30 ; 130 ; 230), et/ou que la géométrie de l'enveloppement ou du contour périphérique extérieur (80) du dispositif de recouvrement (60, 160, 260, 360) est hormis dans la zone de l'au moins un évidement (71 ; 171 ; 271) polygonale, en particulier sensiblement de forme triangulaire ou de forme rectangulaire, ou ronde, en particulier ronde circulaire.
EP17717141.0A 2016-04-13 2017-04-10 Machine-outil portative comprenant un dispositif de recouvrement Active EP3442747B1 (fr)

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DE102016106782.2A DE102016106782A1 (de) 2016-04-13 2016-04-13 Hand-Werkzeugmaschine mit einer Abdeckeinrichtung
PCT/EP2017/058585 WO2017178443A1 (fr) 2016-04-13 2017-04-10 Machine-outil portative comprenant un dispositif de recouvrement

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EP3442747B1 true EP3442747B1 (fr) 2024-01-03

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US (1) US11878384B2 (fr)
EP (2) EP3442747B1 (fr)
JP (2) JP2019513570A (fr)
KR (1) KR102300412B1 (fr)
CN (1) CN109070305B (fr)
AU (1) AU2017248586B2 (fr)
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EP3442747A1 (fr) 2019-02-20
JP2022050454A (ja) 2022-03-30
KR20190005829A (ko) 2019-01-16
AU2017248586A1 (en) 2018-10-04
JP7366987B2 (ja) 2023-10-23
DE102016106782A1 (de) 2017-10-19
CN109070305A (zh) 2018-12-21
AU2017248586B2 (en) 2022-02-03
KR102300412B1 (ko) 2021-09-08
US11878384B2 (en) 2024-01-23
EP4309844A2 (fr) 2024-01-24
EP4309844A3 (fr) 2024-03-27
WO2017178443A1 (fr) 2017-10-19
CN109070305B (zh) 2021-10-01
JP2019513570A (ja) 2019-05-30
US20190118329A1 (en) 2019-04-25

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