EP3880407B9 - Verbindungsanordnung für eine handgeführte werkzeugmaschine und handgeführte werkzeugmaschine - Google Patents

Verbindungsanordnung für eine handgeführte werkzeugmaschine und handgeführte werkzeugmaschine Download PDF

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Publication number
EP3880407B9
EP3880407B9 EP20749892.4A EP20749892A EP3880407B9 EP 3880407 B9 EP3880407 B9 EP 3880407B9 EP 20749892 A EP20749892 A EP 20749892A EP 3880407 B9 EP3880407 B9 EP 3880407B9
Authority
EP
European Patent Office
Prior art keywords
connection
section
extension piece
clamping
clamping element
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
EP20749892.4A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3880407A1 (de
EP3880407B1 (de
Inventor
Stefan Tulodziecki
Hans-Peter Albrecht
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
Publication of EP3880407A1 publication Critical patent/EP3880407A1/de
Publication of EP3880407B1 publication Critical patent/EP3880407B1/de
Application granted granted Critical
Publication of EP3880407B9 publication Critical patent/EP3880407B9/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/62—Means for facilitating engagement or disengagement of coupling parts or for holding them in engagement
    • H01R13/639—Additional means for holding or locking coupling parts together, after engagement, e.g. separate keylock, retainer strap
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
    • B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
    • B25F5/02—Construction of casings, bodies or handles
    • 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
    • B24B37/00—Lapping machines or devices; Accessories
    • B24B37/11—Lapping tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B37/00—Lapping machines or devices; Accessories
    • B24B37/34—Accessories
    • 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
    • B24B41/00—Component parts such as frames, beds, carriages, headstocks
    • 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
    • B24B7/00—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor
    • B24B7/10—Single-purpose machines or devices
    • B24B7/18—Single-purpose machines or devices for grinding floorings, walls, ceilings or the like
    • B24B7/182—Single-purpose machines or devices for grinding floorings, walls, ceilings or the like for walls and ceilings
    • B24B7/184—Single-purpose machines or devices for grinding floorings, walls, ceilings or the like for walls and ceilings pole sanders
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/02—Contact members
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/62—Means for facilitating engagement or disengagement of coupling parts or for holding them in engagement
    • H01R13/629—Additional means for facilitating engagement or disengagement of coupling parts, e.g. aligning or guiding means, levers, gas pressure electrical locking indicators, manufacturing tolerances
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R24/00—Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00—Joints and connections
    • Y10T403/59—Manually releaseable latch type
    • Y10T403/591—Manually releaseable latch type having operating mechanism
    • Y10T403/595—Lever

Definitions

  • the invention relates to a connection arrangement having the features of the preamble of claim 1.
  • the invention also relates to a machine tool having the features of the independent claim.
  • the invention relates to an extension piece with the features of the preamble of claim 20.
  • a connection arrangement and an extension piece corresponding to these preambles are made EP 1 970 168 A1 ( DE 10 2007 012 394 A1 ) - as described in more detail below - known.
  • Machine tools are known from the prior art, for example from the applicant DE 10 2007 012 394 A1 .
  • a hand-held machine tool described with a handle bar which has a plurality of handle bar parts which can be connected to one another by means of a clamping device. This means that the length of the handlebar can be changed to adapt the machine to the job and the handlebar can be dismantled for transport purposes. This favors the handling of the machine tool.
  • the invention is based on the object of facilitating the handling of a hand-held machine tool with simple structural means, in particular its assembly and disassembly. It is also desirable to keep the effort for readjustments as low as possible.
  • connection arrangement with the features of claim 1.
  • the connection arrangement is characterized in that within the cross section of the connection section a mechanical clamping element (e.g. a clamping claw) is arranged on a first of the connection parts and a mechanical counter-element (e.g. a hook) is arranged within the cross section of the connection section of the other connection part.
  • An actuatable tensioning device which acts on the tensioning element, is provided on the connection section of the first connection part.
  • the clamping element and the counter-element are designed in such a way that they can be or are brought into engagement with one another when the connecting sections are plugged together. By actuating the clamping device, the connecting parts can be clamped against one another when the clamping element engages with the counter-element.
  • clamping connection (clamping element and counter-element) is not arranged outside but inside the cross section of the connecting parts (internal clamping connection). This favors handling and transport of the connection arrangement or the machine tool.
  • the internal arrangement of the clamping element and counter-element means that contamination and wear on these components can be reduced.
  • the tensioning element and the counter-element can each have a hook-shaped profile.
  • connection arrangement can be, for example, a hand-held machine tool.
  • connection arrangement can be a act as a connecting line, e.g. a hose or a pipe.
  • the connecting parts can have a pipe section, for example, with a connecting section being formed at one end or at both ends of the pipe section.
  • the further machine module can be a handle part.
  • the handle part can have display elements and/or operating elements for monitoring or operating the machine tool.
  • the (inner) cross section of the connecting parts can be, for example, an interior space.
  • connection arrangement can be easily assembled or disassembled.
  • connection arrangement can be assembled for use of the machine tool and dismantled for transport or storage.
  • the clamping device can have a manually operable clamping lever as the actuating device and be designed such that only this clamping lever has to be actuated to clamp the connecting parts (clamping of two adjacent connecting parts) by means of the clamping element and counter-element.
  • connection arrangement This favors the handling of the connection arrangement, as for locking or unlocking two connection parts only the clamping lever has to be actuated (single-lever actuation or locking).
  • clamping lever has to be actuated (single-lever actuation or locking).
  • the number of controls is small. Only a few manipulations are required for assembly or disassembly of the connection arrangement, which can be carried out by a user alone.
  • the tensioning element can be rotatably mounted on the tensioning device and pretensioned relative to the counter-element, so that the tensioning element and the counter-element automatically engage with one another when the connecting sections are plugged together.
  • the clamping element and the counter-element automatically engage with one another, preferably engaging behind one another.
  • the connecting parts are thus secured to one another even if they are not yet braced by means of the tensioning device. This increases safety during handling, since the risk of damage and also the risk of injury are reduced.
  • a spring element can be provided for pretensioning, which acts on the tensioning element, for example.
  • the spring element can be a compression spring.
  • the clamping element can be fixed to the first connecting part and/or the counter-element to the second connecting part by means of a transverse bolt, with the transverse bolt protruding transversely or at an angle to the longitudinal axis through the cross section of the respective connecting part and with its ends in each case in a wall of the connecting part trained recess or engages a passageway formed in the wall of the connector.
  • the transverse bolt enables reliable power transmission even with comparatively soft materials for the connecting part.
  • the connecting parts can be made of aluminum.
  • the transverse bolt can be designed as a (tubular) sleeve.
  • the transverse bolt can be aligned radially in the connecting part.
  • the tensioning device can have a bearing part which loops around the cross bolt of the first connecting part and defines a bearing point spaced apart from the cross bolt with a bearing axis oriented obliquely or orthogonally to the central longitudinal axis of the cross bolt.
  • the bearing part can be designed as a bearing plate.
  • the bearing plate can preferably have a U-shaped cross section.
  • the tensioning lever can be mounted pivotably on the bearing point of the bearing part by means of a lever shaft, the tensioning element being coupled to the lever shaft by means of an eccentric.
  • a manually operable button can be provided on the connecting section of the first connecting part, which button acts on the tensioning element, wherein the clamping element and the counter-element (when the clamping device is released) can be disengaged by pressing the button.
  • the button must be pressed in order to disengage the clamping element and the counter-element. If the clamping lever is (accidentally) actuated (release of the clamping device), unintentional loosening of the connecting parts can be prevented, since the button must be pressed for this.
  • the tensioning device can be designed in such a way that the tensioning lever can be moved further in the opening direction after the tensioning element has been released, in order to disengage the tensioning element and the counter-element (when the tensioning device is released). In this way too, unintentional loosening of the connecting parts can be prevented.
  • Such a design requires comparatively few components or controls.
  • the counter-element can be guided in a displaceable manner on the second connecting part and by interposing a spring on the second connecting part or on the connecting section of the second connecting part be stored.
  • the direction of force of the spring is aligned in or parallel to the longitudinal direction of the connection part in question.
  • the spring can, for example, be positioned between a shoulder of the counter-element and the transverse bolt.
  • the spring can be a compression spring, for example.
  • the counter-element can expediently be coupled to a holding section or merge into it, with the holding section having an angled section and with the spring being able to be arranged between the angled section and the transverse bolt on the second connecting part.
  • a projection can be formed on the connecting section of the first connecting part, which, when the clamping lever is in the position in which the clamping element is clamped, connects to a free end of the clamping lever, in particular continues its contour. The risk of accidentally opening the clamping lever can thus be significantly reduced by the projection.
  • the projection can be designed as a nose. The free end of the clamping lever faces away from the bearing axis.
  • an electrical plug connector and/or a connection opening to a flow channel formed in the respective connection part can be arranged on the connecting sections, the plug connector and/or the connection opening being arranged within the cross section of the respective connecting section.
  • the plug connector can be designed as a multi-pole plug connector, for example with two or more poles (multi-wire).
  • the plug connector, the clamping element or the counter-element and/or the connection opening can be arranged flush or offset inwards relative to the end face of the respective connection section. In other words, these do not protrude from the relevant connecting section at the front. This reduces the risk of injury or wear and tear. In addition, this offers a certain protection against environmental influences.
  • At least one of the plug connectors can be stretched by means of an elastic element be mounted on the connecting section or on the connecting part, in particular in such a way that the connector or connectors is or are movable relative to the connecting section or to the connecting part.
  • the connectors thus have a certain amount of play so that the connecting parts can always be plugged together.
  • the connector can be reset into a, preferably central, initial position by the elastic element. This creates a defined starting position. If the connector rotates off-centre, the return element can be used to return it to its initial position.
  • one or more dust removal openings can be formed in the plug connector, in particular adjacent to its plug contacts. This reduces the risk of dust deposits impairing the function of the electrical connectors.
  • the dust discharge openings can be flow-connected by means of a flow connection to the flow duct (suction duct) formed in the connection part in question.
  • the connecting section of the first connecting part can advantageously have a collar which projects parallel to the longitudinal axis and with which the connecting section of the first connecting part encompasses the connecting section of the other connecting part when plugged together.
  • the interfaces of the connecting sections can be aligned with one another.
  • the collar helps protect the interfaces of the connecting sections from the environment.
  • the collar is preferably designed to run all the way around.
  • a further connecting part can expediently be provided, which has a connecting section at both ends in such a way that the further connecting part can be inserted as an extension piece between the first and the second connecting part and can be releasably connected to them.
  • the length of the connection arrangement or the hand-held power tool can thus be adjusted if necessary.
  • the object mentioned at the outset is also achieved by a preferably hand-held machine tool having the features of the independent claim.
  • the machine tool has a machining head, a further machine module and a connection arrangement for connecting the machining head and the machine module, as described above.
  • the hand-held processing machine can be a surface processing machine, for example a long-neck sander.
  • the processing head can, for example be trained grinding head.
  • the further machine module can be a handle part, for example.
  • connection arrangement With regard to the advantages that can be achieved with the machine tool, reference is made to the relevant statements on the connection arrangement.
  • the measures described in connection with the connection arrangement can serve to further refine the machine tool.
  • extension piece for a connection arrangement having the features of the independent claim.
  • the extension piece constitutes a further extension part for a connection arrangement as described above.
  • the extension piece has a connecting section at both ends, so that the extension piece can be inserted between the two connecting parts and connected to them for the purpose of lengthening.
  • the extension piece can advantageously be used for a connection arrangement for connecting a machining head and a further machine module of a hand-held machine tool.
  • the extension piece has a connecting section at both ends, via which the extension piece can be connected to a connecting part of the connecting arrangement, the connecting sections of the extension piece each delimit an inner cross-section (e.g. interior space) towards the outside.
  • the extension piece is characterized in that a mechanical clamping element (e.g. clamping claw) is arranged within the cross section of the first connection section and a mechanical counter-element (e.g. hook) is arranged within the cross section of the second connection section, with an actuatable clamping device being provided on the first connection section is, which acts on the clamping element.
  • the extension piece as a (further) connecting part, can be connected to a connecting part just as advantageously as the connecting parts of the connecting arrangement described above.
  • the tensioning element can be designed in such a way that when the first connection section is plugged together with a connection section of a (further) connection part of the connection arrangement, it can be brought into engagement with a counter-element of the connection section, with actuation of the tensioning device locking the extension piece and the connection part against one another can be clamped when the clamping element is engaged with the counter-element. This promotes the ability to connect the extension piece to other connecting parts.
  • the connecting sections of the extension piece can be designed to be complementary (partially complementary or fully complementary) to one another. With others Words could be plugged together the connecting portions of the extension piece. In this way, the extension piece can easily be inserted between the other connecting parts of the connecting arrangement. It is also conceivable for several extension pieces to be plugged together in order to lengthen the connection arrangement.
  • the clamping device can have a manually operable clamping lever and be designed in such a way that only this clamping lever has to be actuated to clamp the extension piece to one of the connecting parts by means of the clamping element and counter-element.
  • bracing is possible in a simple manner and with few components.
  • the tensioning element can be rotatably mounted and pretensioned on the tensioning device, so that the tensioning element automatically engages with a counter-element of the connection part when the extension piece is plugged into a connection part of the connection arrangement.
  • the tensioning element and counter-element can automatically engage with one another when they are plugged together, in particular engage behind one another.
  • the extension piece and the connecting parts are thus secured to one another even if they are not yet braced by means of the tensioning device. This increases safety during handling, since the risk of damage and also the risk of injury are reduced.
  • a spring element can be provided which, for example the clamping element works.
  • the spring element can be a compression spring.
  • the clamping element and/or the counter-element can each be fixed to the extension piece by means of a transverse bolt, with the transverse bolt projecting through the cross section of the extension piece transversely or at an angle to the longitudinal axis and with its ends in each case in a recess formed in the wall of the extension piece or in a engages in the wall of the extension piece formed through passage.
  • a stable connection of the tensioning element or counter-element to the extension piece is thus created.
  • the transverse bolt enables reliable power transmission even with comparatively soft materials for the extension piece.
  • the extension piece can be made of aluminum.
  • the transverse bolt can be designed as a (tubular) sleeve. The transverse bolt can be aligned radially in the extension piece.
  • the tensioning device can have a bearing part which wraps around the cross bolt of the extension piece and defines a bearing point spaced apart from the cross bolt with a bearing axis oriented obliquely or orthogonally to the central longitudinal axis of the cross bolt.
  • the bearing part can be designed as a bearing plate be.
  • the bearing plate can preferably have a U-shaped cross section.
  • the tensioning lever can be mounted pivotably on the bearing point of the bearing part by means of a lever shaft, the tensioning element being coupled to the lever shaft by means of an eccentric.
  • a manually operable button can be provided on the connecting section of the extension piece, which acts on the tensioning element, wherein by pressing the button, the tensioning element (when the tensioning device is released) can be disengaged from the counter-element of a connection part of the connection arrangement.
  • the button must be pressed in order to disengage the clamping element and the counter-element. If the clamping lever is (accidentally) actuated (release of the clamping device), unintentional release of the extension piece can be prevented, since the button must be pressed for this.
  • the tensioning device can be designed in such a way that the tensioning lever can be moved further in the opening direction after the tensioning element has been relaxed in order to disengage the tensioning element from the To bring counter element of a connecting part of the connection arrangement. In this way too, unintentional loosening of the connecting parts can be prevented.
  • Such a design requires comparatively few components or controls.
  • the counter-element can be slidably guided on the extension piece and can be mounted on the extension piece or on the second connecting section of the extension piece by interposing a spring.
  • the direction of force of the spring is aligned in or parallel to the longitudinal direction of the extension piece.
  • the spring can, for example, be positioned between a shoulder of the counter-element and the transverse bolt.
  • the spring can be a compression spring, for example.
  • the counter-element can expediently be coupled to a holding section or merge into it, the holding section having an angled section and the spring being able to be arranged between the angled section and the transverse bolt on the second connecting section of the extension piece.
  • an electrical plug connector and/or a connection opening to a flow channel formed in the extension piece can be arranged on the connecting sections, with the plug connector and/or the connection opening being arranged within the cross section of the respective connecting section.
  • the connection openings on both sides on the extension piece are flow-connected through the flow channel.
  • the electrical plug connectors on both sides which are in particular designed to be complementary to one another, are electrically connected by means of one or more electrical lines. The electrical lines are routed in particular inside the extension piece, for example in a section of the extension piece that is separate from the flow channel.
  • At least one of the connectors can be mounted on the connecting section or on the extension piece by means of an elastic element, in particular in such a way that the connector can be moved relative to the connecting section or the extension piece.
  • the connectors thus have a game so that tube parts can always be plugged together. It is conceivable that the plug connector through the elastic element in a, preferably central, initial position is resettable.
  • connection with the connection arrangement can serve to further develop the connection sections of the extension piece.
  • FIG 1 12 shows a hand-held machine tool, which is denoted overall by the reference numeral 200 (hereinafter "machine tool”).
  • the machine tool 200 is embodied here, for example, as a surface treatment machine 200 in the form of a long-neck grinder.
  • the machine tool 200 has a machining head 202 in the form of a grinding head 202 .
  • the machine tool 200 has a further machine module 204 Form of a handle part 204 on.
  • Machine tool 200 also has a connection arrangement 10 for connecting grinding head 202 and handle part 204.
  • a hose section 206 is arranged on the grinding head 202 and is fluidically connected at one end to a suction point (not shown) located on the grinding head 202 .
  • the hose section 206 is flow-connected at the other end to a hose outlet 208 arranged on the handle part 204, specifically by means of the connection arrangement 10.
  • a hose e.g. suction hose
  • grinding dust produced on the grinding head 202 can be sucked off at the suction point and discharged via the hose section 206 , the connection arrangement 10 (flow channel or suction channel) and the hose outlet 208 .
  • the handle portion 204 can a Have handle portion 210 on which the handle portion 204 can be manually gripped or gripped by a user.
  • the connector assembly 10 may include a connector 14 and another connector 18 that can be connected and disconnected from each other (see FIG figure 1 ).
  • the connecting parts 14, 18 can be releasably connected to one another.
  • the connecting part 18 is formed on the handle part 204 and has a connecting section which corresponds to the connecting section 22 described below (see FIG. 3f.).
  • the handle part 204 or its connecting section can be made of plastic, for example.
  • the connecting part 14 has at one end a connecting section 20 described below (cf. FIG. 3f.), which can be plugged together with the connecting section (without reference number) formed on the handle part 204 . At the other end, the connecting part 14 is connected to a connection piece 212 which carries the grinding head 202 .
  • connection arrangement 10 can have at least one further connection part 16, which can be inserted between the two other connection parts 14, 18 as an extension piece 16 (see FIG figure 2 ).
  • extension piece 16 has a connecting section 20 at one end and a connecting section 20 at the other end Connecting portion 22, as will be described below.
  • connection assembly 10 is described in more detail below with reference to the connector portion 20 of the connector 14 and the connector portion 22 of the connector 16 (see marking "A" in figure 2 and Figure 3f.).
  • a corresponding connection arrangement 10 is located between the connection part 14 and the connection part 18 or between the connection part 16 and the connection part 18 (cf. marking "A'", only in figure 2 indicated).
  • the connecting arrangement 10 forms a connecting line, for example a connecting pipe.
  • the connecting parts 14, 16 each have a tube section, for example a section of an aluminum tube, on which a respective connecting section 20, 22 is formed.
  • connection arrangement 10 serves to connect the sanding head 202 and the handle part 204 of the hand-held power tool 200 in the form of a long-neck sander.
  • the connection arrangement 10 has (at least) two connection parts 14, 16 following one another along a longitudinal axis 12 (cf. FIG. 3f.).
  • the connecting parts 14, 16 can be releasably connected to one another.
  • the connecting part 14 has a connecting section 20 .
  • the connecting part 16 has a connecting section 22 .
  • the connecting parts 14, 16 can be connected to one another via the connecting sections 20, 22, namely by plugging the connecting sections 20, 22 together.
  • the connecting sections 20, 22 each delimit an inner cross section 24, 26 to the outside (see, among figure 5 and 6 ).
  • the connecting parts 14, 16 each have three different interfaces, which are each arranged in the inner cross section 24, 26 or in the interior space 24, 26 of the relevant connecting section 20, 22.
  • the interfaces are an electrical plug connection, a mechanical clamping connection and a flow connection.
  • the clamping connection is spatially arranged between the plug connection and the flow connection and is located approximately in the center of the connection sections.
  • the connecting part 14 has an electrical connector 28 in the inner cross-section 24, which forms a component of the electrical connector.
  • the plug connector 28 can, for example, be designed as a socket (female part).
  • the connecting part 14 has a counter-element 32, which forms a component of the mechanical clamping connection.
  • the counter-element 32 can be designed, for example, as a hook-shaped element or hook 32 .
  • the connecting part 14 also has a Connection opening 36 to a flow channel 40 formed in the connecting part 14 (suction channel), whereby a part of the flow connection is formed.
  • the connecting part 16 has an electrical connector 30 in the inner cross-section 26, which forms a component of the electrical connector.
  • the plug connector 30 can be designed as a plug (male part), for example.
  • the connecting part 16 has a clamping element 34 which forms a component of the mechanical clamping connection.
  • the clamping element 34 can be designed, for example, as a claw-shaped element or clamping claw 34 .
  • the clamping element 34 can be actuated by means of an actuating device in the form of a clamping lever 80 .
  • the connecting part 16 also has a connection opening 38 to a flow channel 42 formed in the connecting part 14, as a result of which part of the flow connection is formed.
  • the connecting part 14 is described in more detail below.
  • the connecting part 14 has a tube section, with the connecting section 20 being arranged at one of its ends.
  • the connecting section 20 has a casing 44 which encloses the connecting part 14 (at its free end) in sections (see FIG figure 5 and 6 ).
  • the casing 44 On the front side, the casing 44 has three passages (without reference numbers) for the electrical plug connector 28 , the mating element 32 and the connection opening 36 .
  • the casing 44 has an outer surface 54 which tapers, in particular conically, outwards, i.e. towards the free end.
  • the casing 44 has a support section 56 that covers the front side of the connecting part 14 (front end of the pipe section).
  • the bearing section 56 can come into contact with a bearing section 58 of the connecting part 16 .
  • the casing 44 has a radially protruding shoulder 60.
  • the shoulder 60 can limit the connecting sections 20, 22 from being plugged together in the direction of insertion. Irrespective of this, the shoulder 60 realizes a smooth transition of the contour from the casing 44 to the tubular section of the connecting part 14.
  • a wall 66 which extends parallel to or along the longitudinal axis 12 and divides the (inner) cross section of the connecting part 14 into two separate sections 70 , 72 .
  • the flow channel 40 is arranged in the first section 70 .
  • the counter element 32 and the electrical plug connector 28 are arranged in the further section 72 .
  • the connector 28 is mounted on the connecting part 14 by means of an elastic element 64 (see FIG figure 13 ). Due to the elastic element 64, the connector 28 is relative to the connecting portion 20 or to the connecting part 14 movable. By means of the elastic element 64, the connector 28 can be reset to a, preferably central, initial position. If the connector 28 has turned off-centre, it can be reset by the elastic element 64 .
  • dust removal openings can be formed on the connector 28 (not shown). These reduce dust deposits on the plug connector 28. The dust discharge openings can be flow-connected to the flow channel 40.
  • the counter-element 32 is fixed to the connecting part 14 by means of a transverse bolt 84 (cf. e.g Figure 6 to 10 and 13 ).
  • the transverse bolt 84 protrudes transversely to the longitudinal axis 12 through the cross section 24 of the connecting part 14.
  • the ends of the cross section 84 each engage in a passage 88 formed in the wall of the connecting part 14 (wall of the pipe section) (see figure 8 ) .
  • the counter-element 32 is displaceably guided on the connecting part 14 and is displaceably mounted on the connecting part 14 by the interposition of a spring 106 .
  • the (hook-shaped) counter-element 32 transitions into a holding section 108, with the holding section 108 having an angled section 110 (see e.g figure 7 and 8th ).
  • the spring 106 is positioned between the angled portion 110 and the cross bolt 84 (see FIG figure 8 ).
  • the spring 106 is attached to the angled portion 110 by means of a screw 11, with a guide bushing on the screw 113 is screwed, which leads the spring 106.
  • the spring 106 is designed in particular as a compression spring 106 .
  • the connecting part 16 is described in more detail below.
  • the connecting part 16 has a tube section, with the connecting section 22 being arranged at one of its ends.
  • the connecting section 22 has a casing 46 which partially encloses the connecting part 16 (at its free end shown here) (see FIG. 4f.).
  • the casing 46 On the front side, the casing 46 has a number of passages (without reference numbers) for the electrical plug connector 30 , the tensioning element 34 and the connection opening 38 .
  • the casing 46 has a collar 50 that protrudes parallel to the longitudinal axis 12 (see FIG figure 6 ), with which the connecting section 22 engages around the opposite connecting section 20 when the connecting parts 14, 16 are plugged together.
  • the collar 50 has an inner surface 52 that widens outwards, in particular that widens conically.
  • the inner surface 52 is designed in particular to correspond to the conically tapering outer surface 44 of the connecting section 20 .
  • the connecting section 22 has on the casing 46 a bearing section 58 which covers the front side of the connecting part 16 (front end of the pipe section).
  • the bearing portion 58 can come into contact with the bearing portion 56 of the connecting portion 20 when the connecting parts 14, 16 are plugged together.
  • a projection 112 is provided on the casing 46, which can be designed as a nose.
  • the projection 112 is designed in such a way that it connects to a free end of the clamping lever 80 when the clamping lever 80 is in the position in which the clamping element 34 is clamped.
  • the projection 112 continues the contour of the clamping lever 80 (see in particular figure 6 ).
  • An actuatable clamping device 82 is provided on the connecting section 22 of the connecting part 16 and acts on the clamping element 34 (see in particular figure 7 ).
  • the clamping element 34 and the counter-element 32 are designed in such a way that they can be brought into engagement with one another when the connecting sections 20, 22 are plugged together.
  • the connecting parts 14, 16 can be braced against one another when the clamping element 34 engages with the counter-element 32.
  • the clamping device 82 can be actuated by means of the manually actuated clamping lever 80 .
  • the clamping device 82 is designed in such a way that only the clamping lever 80 has to be actuated in order to clamp the connecting parts 14 , 16 by means of the clamping element 34 and counter-element 32 .
  • the clamping element 34 is rotatably mounted on the clamping device 82 and is prestressed relative to the counter-element 32 . As a result, the clamping element 34 and the counter-element 32 engage with one another when the connecting sections 20, 22 are plugged together.
  • a spring 92 is provided for this purpose, which acts on the clamping element 34 and is supported, for example, on the inner wall of the tubular section of the connecting part 16 (see in particular figure 8 ).
  • the spring 92 is in particular a compression spring 92.
  • the clamping element 34 is fixed to the connecting part 16 by means of a transverse bolt 86 .
  • the transverse bolt 86 extends transversely to the longitudinal axis 12 through the cross section 26 of the connecting part 16. The ends of the transverse bolt 86 each engage in a passage 90 formed in the wall of the connecting part 16 (see FIG figure 8 ).
  • the clamping device 82 has a bearing part 94, which is designed as a bearing plate with a U-shaped cross section (see e.g Figure 7 to 10 ).
  • the bearing part 94 wraps around the transverse bolt 86 and defines a bearing point 96 spaced apart from the transverse bolt 86 with a bearing axis 98 oriented orthogonally to the central longitudinal axis of the transverse bolt 86 (see in particular figure 10 ).
  • the tensioning lever 80 is pivotably mounted on the bearing point 96 of the bearing part 94 by means of a lever shaft 100, with the tensioning element 34 being coupled to the lever shaft 100 by means of an eccentric 102 (see in particular Figures 8 to 10 ).
  • the clamping device 82 can be designed in such a way that the clamping lever 80 can be moved further in the opening direction after the clamping element 34 has been relaxed (e.g. in figure 4 counterclockwise) to disengage the clamping member 34 and counter member 32 to allow the connectors 14, 16 to be disengaged from one another.
  • a button 104 that can be actuated by hand (e.g. by finger) can be provided on the connecting section 22 of the connecting part 16, which button acts on the clamping element 34, whereby by pressing the button 104 the clamping element 34 and the counter-element 32 (when the clamping device 82 is released) except intervention can be brought (see figures 9 , 11 and 12 ).
  • a wall 68 which extends parallel to or along the longitudinal axis 12 and divides the (inner) cross section of the connecting part 16 into two separate sections 74 , 76 .
  • the flow channel 42 is arranged in the first section 74 .
  • the clamping element 34 or the clamping device 82 and the electrical plug connector 30 are arranged in the further section 76 (cf. figure 6 ) .
  • the plug connector 30 of the connecting part 16 can optionally be mounted on the connecting part 16 by means of an elastic element.
  • the connector 30 is movable relative to the connecting part 16 (not shown). Due to the elastic element, the connector 30 can be preferably in the middle, the starting position can be reset. If the plug connector 30 should have turned off-centre, the elastic element can be used to return it to its initial position.
  • one or more dust removal openings can be formed in the connector 30, in particular adjacent to its plug contacts.
  • the dust removal openings can optionally be flow-connected to the flow channel 42 formed in the connecting part 16 .
  • connection part 16 designed as an extension piece on its own.
  • the extension piece 16 extends along a longitudinal direction 12.
  • the extension piece 16 has a tube section which at one end (in figure 14 left) the connecting section 22 and at the other end (in figure 14 right) has the connecting section 20.
  • connection section 22 of the extension piece 16 is designed in accordance with the connection section 22 of the connection part 16 described above (identical or functionally identical elements are provided with identical reference symbols). In order to avoid repetition, reference is therefore made to the above statements on the connection section 22 of the connection part 16 .
  • connection section 20 of the extension piece 16 corresponds to the connecting section 20 described above of the connecting part 14 (identical or functionally identical elements are provided with identical reference symbols). In order to avoid repetition, reference is therefore made to the above statements on the connection section 20 of the connection part 14 .
  • the flow channel 42 is arranged in the first section 74 .
  • the flow channel 74 extends between the connecting section 22 and the connecting section 20 of the extension piece 16.
  • the connection openings 36 and 38 both open into the flow channel 42.
  • the electrical plug connector 28 and the counter-element 32 are arranged on the connecting section 20
  • the clamping element 34 or the clamping device 82 and the electrical plug connector 30 are arranged on the connecting section 22 .
  • the electrical plug connector 28 and the electrical plug connector 30 are electrically or electronically connected to one another by means of electrical or electronic lines routed through the further section 76 .
  • electricity and / or Control signals are transmitted through the extension piece 16.
  • connection arrangement 10 or a hand-held machine tool equipped with the connection arrangement 10 works as follows (explained with reference to the connection parts 14 and 16): To connect, the connecting parts 14, 16 are first positioned relative to one another in such a way that the connecting sections 20, 22 are aligned with one another in such a way that the connecting sections 20, 22 can be plugged together (cf. e.g. figure 4 , 6 or 11 ).
  • the connecting sections 20, 22 are then plugged together and the clamping lever 80 can be closed (cf. e.g. figure 3 or 9 ).
  • the tensioning element 34 and the counter-element 32 come into engagement with one another (gripping from behind), since the tensioning element 34 is pretensioned relative to the counter-element 32 by the spring 92 (cf. e.g. figure 8 ).
  • the connectors 28, 30 are also connected to one another when they are plugged together. If an end position is reached during plugging, e.g. when the bearing section 56 of the connecting section 20 comes into contact with the bearing section 58 of the connecting section 22, the connection openings 36, 38 are also aligned with one another, so that the flow channel 40 and the flow channel 42 are flow-connected to one another are.
  • the clamping device 82 By pivoting the clamping lever 80, the clamping device 82 is actuated, which acts on the clamping element 34, which engages behind the counter-element 32 (see FIG figure 9 ). As a result, the clamping element 34 is pulled (axially) inwards along the longitudinal direction 12 by means of the eccentric 102 in the connecting part 16 . Because the connecting parts 14, 16 rest against one another at the connecting sections 20, 22, for example by means of the feed sections 56, 58, and the clamping element 34 applies a tensile force to the counter-element 32, the connecting parts 14, 16 are clamped together.
  • the clamping lever 80 To release, the clamping lever 80 must be pivoted in the opening direction, whereby the clamping device 82 is actuated and the clamping element 34 is relieved (tensile force is reduced). The tensioning element 34 and the counter-element 32 are still engaged with one another.
  • the clamping lever 80 In order to disengage the clamping element 34 and the counter-element 32, the clamping lever 80 must be pivoted further in the opening direction, or alternatively button 104 can be actuated. As a result, the clamping element 34 is pivoted in such a way that it is disengaged from the counter-element 32 . The mechanical clamping connection is thus released.
  • the connecting parts 14, 16 can then be separated or pulled apart from one another. By separating the electrical plug connectors 28, 20 and the connection openings 26, 38, the electrical plug connection and the flow connection between the connecting parts 14, 16 are also released.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Clamps And Clips (AREA)
  • Mutual Connection Of Rods And Tubes (AREA)
  • Grinding-Machine Dressing And Accessory Apparatuses (AREA)
  • Portable Power Tools In General (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Quick-Acting Or Multi-Walled Pipe Joints (AREA)
EP20749892.4A 2019-11-05 2020-07-30 Verbindungsanordnung für eine handgeführte werkzeugmaschine und handgeführte werkzeugmaschine Active EP3880407B9 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102019129824.5A DE102019129824A1 (de) 2019-11-05 2019-11-05 Verbindungsanordnung für eine handgeführte Werkzeugmaschine und handgeführte Werkzeugmaschine
PCT/EP2020/071600 WO2021089207A1 (de) 2019-11-05 2020-07-30 Verbindungsanordnung für eine handgeführte werkzeugmaschine und handgeführte werkzeugmaschine

Publications (3)

Publication Number Publication Date
EP3880407A1 EP3880407A1 (de) 2021-09-22
EP3880407B1 EP3880407B1 (de) 2022-07-06
EP3880407B9 true EP3880407B9 (de) 2023-04-19

Family

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EP20749892.4A Active EP3880407B9 (de) 2019-11-05 2020-07-30 Verbindungsanordnung für eine handgeführte werkzeugmaschine und handgeführte werkzeugmaschine

Country Status (7)

Country Link
US (1) US12576503B2 (pl)
EP (1) EP3880407B9 (pl)
JP (1) JP7353371B2 (pl)
CN (1) CN113287232B (pl)
DE (1) DE102019129824A1 (pl)
PL (1) PL3880407T3 (pl)
WO (1) WO2021089207A1 (pl)

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CN115632256A (zh) * 2022-11-01 2023-01-20 深圳银星智能集团股份有限公司 一种清洁设备
DE102024203010A1 (de) * 2024-03-28 2025-10-02 BSH Hausgeräte GmbH Kupplungssystem für eine Saugvorrichtung mit zueinander ausgerichteten elektrischen Steckeinheiten und Führungs-Konturen

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Also Published As

Publication number Publication date
EP3880407A1 (de) 2021-09-22
US20220040838A1 (en) 2022-02-10
WO2021089207A1 (de) 2021-05-14
DE102019129824A1 (de) 2021-05-06
US12576503B2 (en) 2026-03-17
CN113287232B (zh) 2023-11-21
EP3880407B1 (de) 2022-07-06
JP2022534340A (ja) 2022-07-29
CN113287232A (zh) 2021-08-20
JP7353371B2 (ja) 2023-09-29
PL3880407T3 (pl) 2022-10-17

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