EP1404493B1 - Machine-outil portative presentant une poignee avec un systeme d'amortissement des vibrations - Google Patents

Machine-outil portative presentant une poignee avec un systeme d'amortissement des vibrations Download PDF

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Publication number
EP1404493B1
EP1404493B1 EP02714050A EP02714050A EP1404493B1 EP 1404493 B1 EP1404493 B1 EP 1404493B1 EP 02714050 A EP02714050 A EP 02714050A EP 02714050 A EP02714050 A EP 02714050A EP 1404493 B1 EP1404493 B1 EP 1404493B1
Authority
EP
European Patent Office
Prior art keywords
handle
machine housing
hand
levers
machine tool
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.)
Expired - Lifetime
Application number
EP02714050A
Other languages
German (de)
English (en)
Other versions
EP1404493A1 (fr
Inventor
Gerhard Meixner
Pierre Jeannin
Patrick Maillard
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE2001118037 external-priority patent/DE10118037A1/de
Priority claimed from DE2001138123 external-priority patent/DE10138123A1/de
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1404493A1 publication Critical patent/EP1404493A1/fr
Application granted granted Critical
Publication of EP1404493B1 publication Critical patent/EP1404493B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D17/00—Details of, or accessories for, portable power-driven percussive tools
    • B25D17/04—Handles; Handle mountings
    • B25D17/043—Handles resiliently mounted relative to the hammer housing
    • 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
    • B25D—PERCUSSIVE TOOLS
    • B25D2250/00—General details of portable percussive tools; Components used in portable percussive tools
    • B25D2250/371—Use of springs
    • B25D2250/381—Leaf springs

Definitions

  • the present invention relates to a handheld power tool with vibration-damped handle according to the features of the preamble of claim 1.
  • thermoplastic elastomeric plastic is connected to the machine housing. So far, it is usual to connect the handle in two places with the machine housing. Even if one or both coupling points are provided with damping means, still finds a relatively high coupling of vibrations from the machine housing to the handle instead.
  • the invention is therefore based on the object to provide a hand tool with a handle of the type mentioned, which is coupled vibration-damped with space-saving means to the machine housing of the power tool and has a high stability.
  • the handle is coupled via two or more parallel, aligned almost perpendicular to the longitudinal axis of the power tool lever with the machine housing, wherein the levers are hinged on the one hand on the machine housing and the other hand on the handle and at least one of the levers is disposed in a leg of the handle extending approximately perpendicularly to the longitudinal axis of the portable power tool and the at least one other lever is arranged in the machine housing.
  • the articulation point on the handle is as far away as possible from the articulation point on the machine housing. This ensures that the relative movement between the handle and the machine housing has almost exclusively a component in the direction of the longitudinal axis of the power tool. It is advantageous that the distances between their two articulation points are almost equal in all levers, whereby unwanted movement effects of the handle can be avoided.
  • the vibration damping for the handle can be further increased by the fact that at one or more points between the handle and the machine housing spring elements - preferably compression springs - are inserted.
  • a further improvement of the vibration damping can be achieved by disposing one or more active damping elements between the handle and the machine housing instead of purely passive spring elements, which are controllable in such a way that they counteract vibrations of the machine housing.
  • the levers are particularly vibration-damping, if they are designed as leaf springs.
  • the Leaf springs biased against a force exerted on the handle in the direction of the machine housing force.
  • FIG. 1 is schematically a hand tool, for.
  • the hand tool machine consists of a machine housing 1, in which the machine drive located, and a coupled to the machine housing 1 handle. 2
  • the handle 2 is coupled via a parallel rocker with the machine housing 1.
  • This parallel rocker consists of two mutually parallel, almost perpendicular to the longitudinal axis 3 of the machine aligned levers 4 and 5.
  • the levers 4 and 5 are articulated on the one hand on the handle 2 and on the other hand on the machine housing 1 so that the handle 2 can perform a relative movement relative to the machine housing 1 almost exclusively in the direction of the longitudinal axis 3.
  • the pivot point should be 6 or 7 on the handle 2 as far as possible from the pivot point 8 and 9 on the machine housing 1 at each lever 4 and 5 respectively.
  • the pivot points 6, 7 for the two levers 4, 5 at the upper end preferably a parallel to the longitudinal axis 3 extending leg 10
  • the handle 2 are arranged.
  • the other two pivot points 8 and 9 of the levers 4 and 5 are located on a present at the lower end of the machine housing 1 carrier 11.
  • the pivot points 6, 7, 8, 9 of the individual levers 4, 5 are placed so that each lever. 4 , 5 the two pivot points 6, 8 and 7, 9 have the same distances from each other. Namely, at different distances, unwanted movement effects on the handle - movement components, which differ from a movement of the handle in the direction of the machine longitudinal axis - arise.
  • FIG. 2 shows an exemplary embodiment of the inventive coupling of a handle 2 to a machine housing 1 of a hand-held power tool that is oriented towards a practical implementation. All parts already described in connection with FIG. 1 and carrying out the same function are provided in FIG. 2 with the same reference numerals as in FIG.
  • a stop 13 on the machine housing 1 and a stop 14 on the handle 2 are arranged for the compression spring 12 used as damping means between the handle 2 and the machine housing 1.
  • the very space-saving accommodation of the parallel vibrator is effected in that at least one of the levers 4, 5 is accommodated in the leg of the handle 2 extending perpendicularly to the longitudinal axis 13 of the hand tool machine.
  • the support 11 arranged on the machine housing 1 projects for the articulation point 9 of the lever 5 as far as the leg of the lever running perpendicular to the longitudinal axis 3 Handle 2 before.
  • the lower end of this perpendicular to the longitudinal axis 3 extending leg of the handle 2 may be provided with a support 11 surrounding the nozzle 15. This nozzle 15 forms only a conclusion between the carrier 11 and the handle 2, but he does not have the function of a mechanical guide for the handle second
  • levers 4, 5 of the parallel oscillator are arranged away from each other, the greater the stability of the handle.
  • the embodiment in Figure 2 in which the one lever 4 in the machine housing 1 and the other lever 5 is arranged relatively far away from the lever 4 in the handle 2, leading to a high stability of the handle 2.
  • the width (in the direction perpendicular to Drawing plane) of the lever 4, 5 has a stability-enhancing effect.
  • the parallel vibrator described consisting of the levers 4, 5 can be arranged on only one side of the handle 2, as shown in Figures 1 and 2; but it can also be on both sides - seen in the direction transverse to the longitudinal axis 3 of the machine - the handle 2 parallel oscillator.
  • the relative movements of the handle 2 relative to the machine housing 1 are limited by an upper stop 16 and a lower stop 17.
  • the two stops 16 and 17 are integrally formed on the horizontal leg 10 of the handle 2. These two stops 16 and 17 may be, for example, inner walls of a recess in the horizontally extending leg 10 of the handle 2. In these Recess 18 protrudes a firmly connected to the machine housing 1 arm 19. The movement of the handle 2 away from the machine housing 1 is limited by the fact that the arm 19 abuts against the lower stop 17. The movement of the handle 2 towards the machine housing 1 is limited by the fact that the arm 19 strikes the upper stop 16. The distance between the two stops 16 and 17 thus provides the range of motion for the handle 2. In reversal to the illustrated embodiment, the two stops 16 and 17 may also be arranged on the machine housing 1 and the arm 19 on the handle 2. It can also be provided only an upper or lower stop on the machine housing 1 and the handle 2.
  • the levers 4 and 5 forming the parallel oscillator are rigid.
  • the levers 20 and 21 are designed as leaf springs.
  • the two leaf springs 20 and 21 are on the one hand in the horizontal leg 10 of the handle 2 and on the other hand on the housing 1, for example, on the carrier 11, anchored.
  • the leaf springs 20 and 21 are aligned with their broad sides transversely to the direction of movement of the handle 2, so that they are flexible in the direction of the longitudinal axis 3 of the power tool and in the direction transverse to stiff. Due to the resilient action of the levers 20, 21 of the parallel oscillator, outgoing vibrations from the machine housing 1 in the direction of the handle 2 can be absorbed to a high degree.
  • leaf springs designed as levers 20 and 21 may possibly, as shown in Figure 3, are dispensed with the inserted between the housing 1 and the handle 2 spring elements 12.
  • a spring element can be used in addition to receiving vibrations between the machine housing 1 and the handle 2, or as shown in Figure 4, to be replaced by an active damping element 22, the z. B. eletrisch is controlled so that it counteracts vibrations of the machine housing 1.
  • Active damping elements that are used in portable power tools for vibration damping of the handle are, for. B. from WO 98/21014 or EP 0 206 981 A2.
  • active damping elements consist of a magnetic coil 23 slidably mounted on a plunger coil 24, wherein the plunger coil on the handle 2 and the magnetic core 23 on the machine housing 1 and the plunger 24 on the machine housing 1 and the magnetic core 23 is attached to the handle 2.
  • an active damping element functions such that the relative movement of the handle 2 relative to the machine housing 1 or the force exerted on the handle 2 is sensed and the current through the plunger coil 24 is controlled as a function of the measured relative movement or force.
  • more than one spring element or more than just an active damping element can be used between the handle 2 and the machine housing.
  • the combination of spring element and active damping element is possible.
  • the parallel oscillator is formed by two leaf springs 25 and 26, which are bent in such a way that they engage the handle 2 with its lower stop 17 Press the preload against the fixed arm 19.
  • a certain force must be exerted on the handle 2.
  • the handle 2 With appropriate adjustment of the bias of the leaf springs 25 and 26 is achieved that at an average process force of z. B. 100N the handle 2 is moved so far that the fixed arm 19 is in the middle between the two stops 16 and 17. This can be avoided that it comes during the work process to a hard stop of the arm 19 to the two stops 16 and 17.
  • a damping element as shown in FIGS. 1, 2 and 4, can be inserted between the machine housing 1 and the horizontally extending limb 10 of the handle 2.

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

Abstract

L'objectif de l'invention est d'assurer un accouplement entre la poignée (2) et le boîtier (1) d'une machine-outil portative de façon à amortir le plus possible les vibrations. A cet effet, la poignée (2) est accouplée au boîtier par l'intermédiaire d'au moins deux leviers (4, 5) parallèles, pratiquement perpendiculaires à l'axe longitudinal (3) de la machine-outil portative. Les leviers (4, 5) sont articulés d'une part sur le boîtier (1) et d'autre part sur la poignée (2).

Claims (8)

  1. Machine-outil portative présentant une poignée (2) dont les vibrations sont amorties par utilisation de moyens d'amortissement (12) couplés au boîtier de machine (1), la poignée (2) étant accouplée au boîtier de machine par au moins deux leviers (4, 5, 20, 21, 25, 26) à peu près perpendiculaires à l'axe longitudinal (3) de la machine, et articulés d'un côté au boîtier de machine et de l'autre côté à la poignée (2),
    caractérisée en ce qu'
    au moins un des leviers (5) est monté dans une branche de la poignée (2) à peu près perpendiculaire à l'axe longitudinal (3) de la machine, tandis qu'au moins un autre levier (4) est monté dans le boîtier de machine (1).
  2. Machine-outil portative selon la revendication 1,
    caractérisée en ce que
    chaque levier (4, 5, 20, 21, 25, 26) a son point d'articulation (6, 7) sur la poignée (2) éloigné le plus possible de son point d'articulation (8, 9) sur le boîtier de machine (1).
  3. Machine-outil portative selon la revendication 1 ou 2,
    caractérisée en ce que
    tous les leviers (4, 5, 20, 21, 25, 26) ont leurs distances séparant leurs deux points d'articulation (6, 7, 8, 9) à peu près égales.
  4. Machine-outil portative selon la revendication 1,
    caractérisée en ce que
    la poignée (2) s'appuie sur le boîtier de machine (1), en un ou plusieurs endroits, par l'intermédiaire d'un élément élastique (12), de préférence un ressort de poussée.
  5. Machine-outil portative selon la revendication 1,
    caractérisée en ce que
    sur un ou plusieurs endroits situés entre la poignée (2) et le boîtier de machine (1), un élément d'amortissement actif (12) peut être commandé de manière à s'opposer aux vibrations du boîtier de machine (1).
  6. Machine-outil portative selon une des revendications 1 à 3,
    caractérisée en ce que
    les leviers sont des ressorts à lame (20, 21, 25, 26).
  7. Machine-outil portative selon la revendication 6,
    caractérisée en ce que
    les ressorts à lame (25, 26) sont précontraints à l'opposé d'une force exercée sur la poignée (2) en direction du boîtier de machine (1).
  8. Machine-outil portative selon une des revendications précédentes,
    caractérisée en ce que
    le mouvement relatif de la poignée (2) et du boîtier de machine (1) est limité par une ou plusieurs butées (16, 17).
EP02714050A 2001-04-11 2002-02-20 Machine-outil portative presentant une poignee avec un systeme d'amortissement des vibrations Expired - Lifetime EP1404493B1 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE2001118037 DE10118037A1 (de) 2001-04-11 2001-04-11 Handwerkzeugmaschine mit vibrationsgedämpftem Handgriff
DE10118037 2001-04-11
DE2001138123 DE10138123A1 (de) 2001-08-03 2001-08-03 Handwerkzeugmaschine mit vibrationsgedämpftem Handgriff
DE10138123 2001-08-03
PCT/DE2002/000622 WO2002083369A1 (fr) 2001-04-11 2002-02-20 Machine-outil portative presentant une poignee avec un systeme d'amortissement des vibrations

Publications (2)

Publication Number Publication Date
EP1404493A1 EP1404493A1 (fr) 2004-04-07
EP1404493B1 true EP1404493B1 (fr) 2007-02-14

Family

ID=26009067

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02714050A Expired - Lifetime EP1404493B1 (fr) 2001-04-11 2002-02-20 Machine-outil portative presentant une poignee avec un systeme d'amortissement des vibrations

Country Status (6)

Country Link
US (1) US7100706B2 (fr)
EP (1) EP1404493B1 (fr)
JP (1) JP4157382B2 (fr)
CN (1) CN1273271C (fr)
DE (1) DE50209495D1 (fr)
WO (1) WO2002083369A1 (fr)

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Also Published As

Publication number Publication date
CN1460049A (zh) 2003-12-03
JP4157382B2 (ja) 2008-10-01
WO2002083369A1 (fr) 2002-10-24
EP1404493A1 (fr) 2004-04-07
US7100706B2 (en) 2006-09-05
US20030132016A1 (en) 2003-07-17
DE50209495D1 (de) 2007-03-29
CN1273271C (zh) 2006-09-06
JP2004518553A (ja) 2004-06-24

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