EP2123406B1 - Support à vibrations amorties pour poignée supplémentaire - Google Patents

Support à vibrations amorties pour poignée supplémentaire Download PDF

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Publication number
EP2123406B1
EP2123406B1 EP08009186A EP08009186A EP2123406B1 EP 2123406 B1 EP2123406 B1 EP 2123406B1 EP 08009186 A EP08009186 A EP 08009186A EP 08009186 A EP08009186 A EP 08009186A EP 2123406 B1 EP2123406 B1 EP 2123406B1
Authority
EP
European Patent Office
Prior art keywords
handle
power tool
damping device
recited
shock absorber
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
EP08009186A
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German (de)
English (en)
Other versions
EP2123406A1 (fr
Inventor
Markus Oesterle
Thomas Robieu
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.)
Techtronic Industries GmbH
Original Assignee
AEG Electric Tools 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 AEG Electric Tools GmbH filed Critical AEG Electric Tools GmbH
Priority to EP08009186A priority Critical patent/EP2123406B1/fr
Priority to US12/467,898 priority patent/US8256528B2/en
Priority to CN2009102034181A priority patent/CN101585184B/zh
Publication of EP2123406A1 publication Critical patent/EP2123406A1/fr
Application granted granted Critical
Publication of EP2123406B1 publication Critical patent/EP2123406B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
    • B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
    • B25F5/006—Vibration damping means
    • 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
    • B25F5/025—Construction of casings, bodies or handles with torque reaction bars for rotary tools
    • B25F5/026—Construction of casings, bodies or handles with torque reaction bars for rotary tools in the form of an auxiliary handle

Definitions

  • the invention relates to a damper for mounting between a power tool having a vibration axis on the one hand and a handle device for the power tool on the other hand, wherein the damper comprises a damping device for damping shocks and a spacing device.
  • the invention further relates to a handle for a power tool having a vibration axis and to a power tool having a vibration axis, in particular a drilling or impact drill or a hammer drill.
  • Hand-held machine tools such as power tools, e.g. Angle or cut-off grinder, polishing machines, drills, rotary hammers o. The like.
  • Power tools e.g. Angle or cut-off grinder, polishing machines, drills, rotary hammers o.
  • the machine tool is grasped and guided by the main handle.
  • Such an additional handle is usually releasably attached, for example, on the gear housing of the machine tool. Run as a handle handle he stands out radially to the longitudinal axis of the machine tool and facilitates the leadership in difficult machining tasks.
  • a damper according to the preamble of claim 1 is made GB 2 376 913 A known.
  • the vibrations of the power tool arise while along a vibration axis.
  • the axis of vibration designates the axis along which a bit tool or the like is impacted onto the substrate to be worked.
  • the resulting vibrations and vibrations are transmitted on the one hand directly on the tool housing and the molded main attack as well as via the auxiliary handle on the hands or the arms of the user. Due to the sometimes tremendous shocks and vibrations that occur when using a corresponding power tool, they represent high loads, especially on the joints of the user. A damping of these vibrations is especially in the interests of occupational medicine essential to permanent health damage from The use of such a power tool can result in sustainable prevent.
  • the object of the present invention is to provide a damper, a handle for a power tool and a power tool with a handle that is associated with the abovementioned technical field, in which vibrations that occur along a vibration axis are particularly well damped.
  • the spacing device is dimensioned such that when the damper is mounted, a ratio of a first distance between the vibration axis and the grip device to a second distance between the vibration axis and the damping device is at least 2: 1. In other words, therefore, the distance between the vibration axis and the grip device is at least twice as large as the distance between the vibration axis and the damping device.
  • the damping device is arranged between the grip device and the spacing device.
  • the vibration axis here represents an axis along which vibrations during operation of a power tool can arise.
  • vibration axis is the axis about which a drill of a percussion drill rotates, or a striking axis of a hammer drill. Since the vibrations that occur along this axis, are particularly large and any vibrations of the electric motor or other peripherals of the power tool far outweigh the intensity is It is of particular importance to attenuate just these strong vibrations when they propagate on a hand or arm of a user of the power tool largely. According to the invention, therefore, the distance between the grip device and the damping device is selected such that the damping device dampens vibrations particularly efficiently.
  • the distance of the handle device to the damping device should be as large as possible in relation to the distance of the damping device to the place where the vibrations to be damped arise, with a comfortable use of the power tool is not disregarded.
  • the spacing device can in this case be provided both as a separate element and integrally with the damping device and / or the grip device.
  • the damping device has an elastic element and may preferably also have a stop element.
  • Such elements are advantageous because the damping device can show fatigue during their operation, leading in extreme cases to the destruction of the damping device and possibly to tearing off the grip device.
  • the elastic element of the damping device serves to damp by deforming in interaction with the vibration of the power tool and thus only transmits the vibrations to the grip device in a weakened manner.
  • the damping device which may be cylindrical, for example, has a particular multi-piece casing, which casing preferably has an annular sheath, preferably a metal ring.
  • a casing is for example particularly well suited to serve as a stop element for the damping device.
  • the shuttering therefore preferably surrounds the parts cooperating with the elastic element, so that they are held in the casing in the event of a failure of the elastic element, for example when the elastic element breaks or breaks.
  • the handle member can be prevented from being inadvertently released from the power tool in which the damper is mounted.
  • An annular sheathing of the casing serves for additional stability, which is provided by a metal ring in particular.
  • a stable casing not only serves to protect the elastic element, which can be accommodated in the casing, but also has a particularly high strength, which may be of particular importance in a use of the casing as a stop element and protection.
  • the damper further comprises a fastening device for fastening the damper to the power tool, which is provided in particular with a clamping device.
  • a damper side fastener has the advantage that the damper can be used with a variety of power tools.
  • the damper can be hooked directly to the housing of the power tool and is therefore also, for example, for transport, especially easy to remove again.
  • the fastening device can otherwise be formed, for example, by a screw thread which can be screwed into the power tool housing.
  • a handle according to the invention for a power tool with a vibration axis comprises a damper, which may be designed as described above, and a handle device connected to the damper. Together with the gripping device, the damper forms a handle for a power tool, with which a power tool can be guided and dampens the vibrations of the power tool, which arise along a vibration axis, particularly good.
  • the handle is characterized in that the damping device, the spacing device and the gripping device, in particular in this order, are arranged linearly adjacent to one another.
  • the damping device, the spacer device and the grip device are thus arranged adjacent to one another in a row, so that the ratio between the distances between the grip device and the vibration axis of a power tool, to which the handle is attached, and the distance between the damping device and the vibration axis is particularly easily adjustable.
  • the damping device thus lies between the grip device and the vibration axis and the spacing device lies between the damping device and the grip device, whereby the distance between the damping device and the grip device can be adjusted so that the desired ratio of the distances between grip device and vibration axis and damping device and vibration axis complied can be.
  • the damping device, the spacing device and the gripping device are each connected to one another by screw fasteners.
  • screw fasteners In this way, it is particularly easy to retrofit an existing handle without a damping device according to the invention with such a later.
  • individual elements of the handle are made in one piece with each other. This applies for example, for the spacing device and the handle device and the spacing device and the damping device.
  • the damping device may for example also be designed in one piece with the fastening device.
  • a power tool according to the invention with a vibration axis is characterized in that it comprises a handle described above.
  • a power tool is characterized by a particularly good vibration damping of vibrations along the vibration axis.
  • the power tool thus corresponds to particularly high occupational health requirements and also allows a constant use of the power tool, without any health damage to the user are to be feared.
  • the power tool is characterized in that a first distance of the handle device of the mounted handle to the vibration axis is greater than a second distance of the damping device of the mounted handle to the vibration axis, wherein a ratio of the first distance to the second distance is at least 2: 1.
  • a power tool in which the distances between the vibration axis and the grip device and the vibration axis and the damping device are selected so that the first distance is at least twice as large as the second distance, has a particularly good vibration damping of the mounted handle.
  • the handle is thereby manually, in particular by a clamping mechanism, removable.
  • Such a power tool is also characterized by a high level of flexibility, because the handle, for example, for manual transport is removable. Manually detachable in this case means that no additional tool is needed to remove the handle from the power tool.
  • the above described clamping mechanism is a particularly simple way to perform the handle manually removable. In addition, however, also screw or similar fastening methods are possible.
  • Fig. 1 shows a cross-sectional view of a damper 2 with a damping device 32 and a spacing device 12.
  • the section through the damper 2 according to the invention which has a generally cylindrical shape, takes place substantially along the cylinder axis of the damper 2.
  • a damping device 32 which has in a two-part casing 6 an elastic element 4, a first connecting element 8 and a second connecting element 10.
  • the casing forms a cylinder with a first diameter, in which the in Fig. 1 illustrated elastic element 4 also is cylindrical and introduced.
  • the elastic member 4 is performed in this embodiment as NBR (nitrile rubber), wherein the elastic member 4 may be formed of other elastic materials, a coil spring or the like.
  • NBR nonrile rubber
  • each one of the connecting elements 8, 10 is attached.
  • the first connecting element 8 is attached, which is acted upon by the elastic element 4 with a pressure against the first end face of the cylindrical casing 6.
  • the first connecting element 8 in this case has a plate-shaped bottom, which has a bottom surface corresponding to the elastic element 4. With the bottom, a screw is integrally formed, which forms a second part of the connecting element 8. The screw pierces the first end face of the casing 6 to the outside.
  • the screw of the connecting element 8 can be attached to a fastening device with a corresponding internal thread, which also the shuttering 6 and thus the elements therein are fastened to the fastening device.
  • a second connecting element 10 which is designed analogously to the first connecting element 8, wherein a helical part of the second connecting element 10, which is also integrally formed with a plate-shaped bottom, through the lower end face of the casing 6 of the damping device 32 abuts the outside.
  • the elastic element 4 is clamped between the bottoms of the two connecting elements 8, 10, whereby the connecting elements 8, 10 are pressed with a pressure against the respective adjacent upper and lower end side of the substantially cylindrical casing 6.
  • the casing 6 is used in cooperation with the bottom parts of the connecting elements 8, 10 at the same time as a stop element for the damping device 32.
  • the casing 6 is reinforced along its cylinder jacket by a metal ring 16.
  • the metal ring 16 allows a particularly high strength of the casing 6 with respect to radial movements of the casing.
  • the metal ring 16 allows a very high strength of the casing 6 in a simple manner.
  • the spacing device 12 which is likewise essentially cylindrical, is attached.
  • a second diameter of the cylindrical spacing device 12 is substantially smaller than the first diameter of the damping device 32.
  • the spacing device 12 has an internal thread which coincides with the external thread of the screw of the connecting element 10. Thus, the spacing device can be easily attached to the damping device 32.
  • the damping device 32 opposite end the spacing device 12 also has a further, designed as an internal thread connection option 14, for example, for connection to a handle device on.
  • Fig. 2 shows a handle according to the invention with the in Fig. 1 shown damper 2 in a cross-sectional view.
  • the first connection element 8 of the Damper 2 is in the in Fig. 2 illustrated embodiment connected to a fastening device 22.
  • the fastening device 22 has in its damper 2 side facing a provided with an internal thread recess, which serves for fastening of the damper 2 with the fastening device 22.
  • the fastening device 22 in this case has a metallic open ring 24, which encloses a substantially circular space 30.
  • the space 30 serves to receive a portion of a power tool 34 to which the handle is to be attached.
  • the metallic open ring 24 is held together by a clamping device 28 with a clamping lever 26.
  • the tensioning device 28 which is operated by the lever 26, the circumference of the open metallic ring 24 can be tapered. In this way, a voltage between the handle and the power tool 34 are generated, so that the handle is detachably connected to the power tool 34 detachable.
  • a gripping device 18 is fastened via the recess 14 and a helical connecting element 20.
  • the spacing device 12 ensures that the distance between the grip device 18 and the elastic element 4 of the damping device 32 is in a sufficiently large ratio to the distance between the center of the space 30 of the fastening element 22 and the elastic element 4.
  • the handle is preferably made of a plastic and coated with a resilient layer, in particular a rubber layer, which allows a user a secure grip and gives a comfortable grip.
  • Fig. 3 shows the in Fig. 2 illustrated handle in an exploded view.
  • the fastening device 22 with the metallic open ring 24, the space defined by him 30, the tensioning device 28 and the lever member 26 shown.
  • the damper 2 which is already in Fig. 1 was shown, shown.
  • the two-part shuttering 6 which is composed of two shell parts 6.1 and 6.2, shown.
  • Each of the shell parts 6.1, 6.2 essentially forms a half-cylinder jacket which is capable of accommodating the cylindrical elastic element 4 and the plate-shaped bottoms of the connecting elements 8, 10.
  • the two half-cylinder jacket-shaped shuttering parts 6.1, 6.2 form the complete and substantially cylindrical casing 6, which is held together in the assembled state by the metal ring 16.
  • the spacing device 12 is likewise of cylindrical design, wherein the cylinder axis of the spacing device 12 is substantially aligned with the cylinder axis of the damping device 32.
  • the diameter of the cylindrical spacing device 12 is substantially smaller than the first diameter of the damping device 32.
  • the grip device 18 is screwed via the recess 14 and a screw 20.
  • the rotationally symmetrical gripping device 18, with its axis of symmetry, likewise lies essentially on the cylinder axis of the spacing device 12 and the damping device 32.
  • Fig. 4 shows a power tool 34 according to the invention with a handle according to the invention, the elements already shown and described in the previous figures having.
  • the handle has the damping device 32, the spacing device 12, the gripping device 18 and the fastening device 22.
  • the fastening device 22 is arranged on the power tool 34 such that a vibration axis A of the power tool 34 is enclosed by the fastening device 22.
  • the vibration axis A of the power tool 34 is formed in this example by an axis along which the power tool designed as a hammer drill 34 acts on a substrate.
  • the axis A extends centrally through the space 30 of the fastener 22nd
  • Fig. 4 shows here that a first distance Y between the vibration axis A of the power tool 34 and the grip device 18 is at least twice as large as a second distance X between the vibration axis A of the power tool 34 and the damping device 32 of the damper 2.
  • the spacing device 12 ensures that that the distance of the gripping device 18 from the damping device 32 is sufficiently large so that this ratio between the first distance Y and the second distance X is maintained.
  • the first distance Y is measured from the vibration axis A to a point on the grip device, where the thumb and forefinger meet in the usual hand position.
  • the damping member 32 is mounted as close to the housing of the power tool 34 as possible.
  • handle device 18 provided as close as possible to power tool 34, a ratio according to the invention between the two distances Y and X can still be ensured.
  • power tool 34 may be a drill or impact drill instead of a hammer drill.
  • other power tools with a vibration axis or with strong vibration or vibration, which arise in a defined direction or at a defined location, are basically suitable for the application of the damper according to the invention.
  • the handle may be connected by a clamping device 22 with the power tool 34 as in the present embodiment.
  • the handle is firmly joined to the power tool.
  • a fferbefest Trent the handle on the power tool 34 is conceivable and the damper 2 of the invention can also be retrofitted as a spacer element between an existing already on a power tool handle and this handle, if the handle can be solved by the power tool.
  • the assembly of the handle does not necessarily have to be such that a fastener must be aligned in the region of a vibration axis and can be attached to many different locations of the power tool 34.
  • the casing 6 of the damper 2 is used in the embodiment described here not only as a stop but also as a tear-off. If the elastic element 4, which connects the two connecting elements 8, 10 via their bottom sections with each other, tear due to signs of aging or overload, the casing 6 securely holds the handle and the power tool together. A failure of the casing 6 is due to the metal ring 16 of the invention, which can also be made of a material other than metal, within the conceivable limits of use of the power tool limits almost impossible.
  • the diameter of the cylindrical damping element 32 need not be greater than the diameter of the spacer 12. It is also conceivable that such a damping device integral with the Spacing device and / or the handle device is executed. Also, the fastener may be integral with the damper and the handle device. Depending on the tool, spacers of different lengths may also be provided, which enables a particularly flexible and versatile application of the damper according to the invention in power tools.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)

Claims (12)

  1. Amortisseur (2) à monter entre un outil électrique (34) avec un axe de vibration (A) d'une part et un dispositif de poignée (18) formant une poignée supplémentaire dépassant par rapport à l'axe de vibration (A) et prévu en supplément d'une poignée principale de l'outil électrique (34) pour l'outil électrique (34) d'autre part, comprenant un dispositif d'amortissement (32) pour l'amortissement de chocs,
    un dispositif d'espacement (12) disposé entre le dispositif de poignée (18) et le dispositif d'amortissement (32) étant dimensionné de telle sorte que l'amortisseur (2) peut être monté de telle façon qu'un rapport entre un premier espacement (Y) entre l'axe de vibration (A) et le dispositif de poignée (18) et un second espacement (X) entre l'axe de vibration (A) et le dispositif d'amortissement (32) est d'au moins 2:1, caractérisé en ce que,
    le dispositif d'amortissement (32) est conçu pour l'amortissement d'un mouvement axial le long d'un axe et d'un mouvement de basculement par rapport à l'axe.
  2. Amortisseur (2) selon la revendication 1, caractérisé en ce que le dispositif d'espacement (12) par rapport au dispositif d'amortissement (32) et au dispositif de poignée (18) est un composant séparé, qui est monté entre le dispositif d'amortissement (32) et le dispositif de poignée (18).
  3. Amortisseur (2) selon la revendication 1 ou 2, caractérisé en ce que le dispositif d'amortissement (32) présente un élément (4) élastique.
  4. Amortisseur (2) selon l'une des revendications 1 à 3, caractérisé en ce que le dispositif d'amortissement (32) présente un élément de butée (6).
  5. Amortisseur (2) selon l'une des revendications 1 à 4, caractérisé en ce que le dispositif d'amortissement (32) présente un coffrage (6, 6.1, 6.2), en particulier en plusieurs morceaux, lequel coffrage (6, 6.1, 6.2) présente de préférence une enveloppe (16) de forme annulaire, de préférence une bague métallique.
  6. Amortisseur (2) selon l'une des revendications 1 à 5, caractérisé en ce qu'il présente également un dispositif de fixation (22), en particulier avec un dispositif de serrage, pour la fixation de l'amortisseur (2) sur l'outil électrique (34).
  7. Poignée supplémentaire pour un outil électrique (34) avec un axe de vibration (A), comprenant un amortisseur (2) selon l'une des revendication 1 à 6 et un dispositif de poignée (18) relié à l'amortisseur (2).
  8. Poignée supplémentaire selon la revendication 7, caractérisé en ce que le dispositif d'amortissement (32), le dispositif d'espacement (12) et le dispositif de poignée (18) sont disposés en se faisant suite de façon linéaire, en particulier dans cet ordre.
  9. Poignée supplémentaire selon l'une des revendications 1 à 8, caractérisé en ce que le dispositif d'amortissement (32), le dispositif d'espacement (12) et le dispositif de poignée (18) sont reliés les uns aux autres par des fixations à vis (10, 20).
  10. Outil électrique (34) comprenant un axe de vibration (A), en particulier une perceuse à main ou une perceuse électrique à percussion ou un marteau perforateur, caractérisé en ce qu'il présente une poignée supplémentaire selon l'une des revendications 7 à 9.
  11. Outil électrique (34) selon la revendication 10, caractérisé en ce qu'un rapport entre une première distance (Y) du dispositif de poignée (18) de la poignée supplémentaire montée à l'axe de vibration (A) et une seconde distance (X) du dispositif d'amortissement (32) de la poignée montée à l'axe de vibration (A) est d'au moins 2:1.
  12. Outil électrique (34) selon la revendication 10 ou 11, caractérisé en ce que la poignée supplémentaire peut être enlevée manuellement, en particulier par un mécanisme de serrage.
EP08009186A 2008-05-19 2008-05-19 Support à vibrations amorties pour poignée supplémentaire Active EP2123406B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP08009186A EP2123406B1 (fr) 2008-05-19 2008-05-19 Support à vibrations amorties pour poignée supplémentaire
US12/467,898 US8256528B2 (en) 2008-05-19 2009-05-18 Vibration-damped holder for additional handle
CN2009102034181A CN101585184B (zh) 2008-05-19 2009-05-19 用于附加手柄的减震器

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP08009186A EP2123406B1 (fr) 2008-05-19 2008-05-19 Support à vibrations amorties pour poignée supplémentaire

Publications (2)

Publication Number Publication Date
EP2123406A1 EP2123406A1 (fr) 2009-11-25
EP2123406B1 true EP2123406B1 (fr) 2011-12-21

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Application Number Title Priority Date Filing Date
EP08009186A Active EP2123406B1 (fr) 2008-05-19 2008-05-19 Support à vibrations amorties pour poignée supplémentaire

Country Status (3)

Country Link
US (1) US8256528B2 (fr)
EP (1) EP2123406B1 (fr)
CN (1) CN101585184B (fr)

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US20090283283A1 (en) 2009-11-19
CN101585184B (zh) 2013-01-02
US8256528B2 (en) 2012-09-04
CN101585184A (zh) 2009-11-25
EP2123406A1 (fr) 2009-11-25

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