EP1716980B1 - Outil portatif avec entraînement à basculement - Google Patents

Outil portatif avec entraînement à basculement Download PDF

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Publication number
EP1716980B1
EP1716980B1 EP06112544A EP06112544A EP1716980B1 EP 1716980 B1 EP1716980 B1 EP 1716980B1 EP 06112544 A EP06112544 A EP 06112544A EP 06112544 A EP06112544 A EP 06112544A EP 1716980 B1 EP1716980 B1 EP 1716980B1
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EP
European Patent Office
Prior art keywords
drive
bearing area
bearing
driven
guide
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
EP06112544A
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German (de)
English (en)
Other versions
EP1716980A1 (fr
Inventor
Jens Neumann
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.)
Hilti AG
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Hilti AG
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Filing date
Publication date
Application filed by Hilti AG filed Critical Hilti AG
Publication of EP1716980A1 publication Critical patent/EP1716980A1/fr
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Publication of EP1716980B1 publication Critical patent/EP1716980B1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D11/00—Portable percussive tools with electromotor or other motor drive
    • B25D11/06—Means for driving the impulse member
    • B25D11/062—Means for driving the impulse member comprising a wobbling mechanism, swash plate
    • 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
    • B25F5/001—Gearings, speed selectors, clutches or the like specially adapted for rotary tools
    • 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
    • B25D2250/331—Use of bearings
    • B25D2250/335—Supports therefor
    • 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
    • Y10T74/00—Machine element or mechanism
    • Y10T74/18—Mechanical movements
    • Y10T74/18056—Rotary to or from reciprocating or oscillating
    • Y10T74/18296—Cam and slide

Definitions

  • the invention relates to a hand tool with a tumbling device.
  • This has a drive element rotatable about a drive axis and a driven element coupled to the drive element via a wobble bearing.
  • the output element is alternately held back and forth swiveling about a wobble axis.
  • the swash bearing on the drive element has a drive-side bearing area with a drive-side guide running around the drive axis and an output-side bearing area with an output-side guide encircling the drive axis on the output element.
  • the swash bearing rolling elements which are guided simultaneously in both the drive-side guide and in the output-side guide.
  • the swash bearing has at one of the bearing areas on a first side with respect to the guide in question a cross-sectional reinforcement with respect to a second side of the bearing area.
  • Such wobble devices are often used in rotary hammers to generate a reciprocating linear movement of a piston from a rotary motion of a drive spindle.
  • a striking body is driven, which serves for the pulse-like application of impact energy to a tool holder.
  • DE 34 27 342 A1 describes a rotary hammer with a driven by a wobble air cushion percussion.
  • the wobble drive has a pressed onto an intermediate shaft drum with a spherical outer side, in which a trough is inserted. Furthermore, the wobble drive on an annular swash plate, on the inside of an outer raceway is recessed. Between the trough and the outer trough balls are arranged, which are guided in both troughs simultaneously.
  • Such wobble drives are subject during operation of a relatively heavy stress, in particular occurring during operation of the percussion pulse-like reaction forces.
  • the bearing areas can only be dimensioned so that even a mounting of the drive element and the output element and the intermediate rolling elements is possible.
  • the storage areas have only a limited breaking strength. As a result, in particular in the area of the guides Material breaks occur that significantly shorten the intended life of the wobble drive.
  • a hand tool with a wobble device which has a rotatable drive shaft about a drive element and a coupled via a swash bearing with the drive element output member which is alternately held back and forth swiveling about a wobble axis.
  • the swash bearing has on the drive element a drive-side bearing area with a drive-side guide encircling the drive axis, on the output element an output-side bearing area with a peripheral drive around the drive shaft output side guide and rolling elements, which are guided in both guides simultaneously.
  • the swash bearing has at one of the bearing areas on a first side with respect to the guide in question a cross-sectional reinforcement with respect to a second side of the bearing area.
  • the present invention has for its object to avoid the disadvantages mentioned in a wobble drive and to ensure greater stability.
  • the object is achieved in that the cross-sectional reinforcement at the output side bearing area is formed by a reduced inner diameter of the first side of the output side bearing portion on the output side guide against the inner diameter on the second side of the output side storage area.
  • the cross-sectional reinforcement can be formed, for example, by a material reinforcement or a region-wise cross-sectional enlargement with respect to a basic shape of the relevant bearing area.
  • the strength of the swash bearing in an axial direction with respect to the drive axle, in which particularly high material stresses occur during operation, can be significantly increased.
  • less strong side of the storage area in question can be done mounting.
  • the cross-sectional reinforcement is formed by a circumferential cross-sectional enlargement of the respective storage area on the first side with respect to the guide relative to the basic shape of the storage area on the second side.
  • cylindrical or spherical basic shape of the storage area thus the cross-sectional enlargement is achieved by a changed diameter of the storage area on the first side relative to the diameter on the second side of the storage area.
  • a higher breaking strength is achieved on the first side of the relevant guide by an enlarged material cross-section, which allows trouble-free operation of the wobble drive over the life of the power tool.
  • the cross section of the bearing area is designed such that a trouble-free installation of the drive element and the output element with the interposition of the rolling elements is possible.
  • the output-side storage area has a cylindrical basic shape both on the first side and on the second side.
  • the different inner diameters of the driven-side bearing region can be produced particularly easily by drilling with different diameters.
  • the cross-sectional reinforcement is formed by an enlarged outer diameter of the first side of the drive-side bearing area on the drive-side guide relative to the second side of the drive-side bearing area.
  • the drive-side bearing area preferably has a spherical basic shape both on the first side and on the second side in order to enable a maximum cross-sectional area and thus maximum stability in the entire drive-side bearing area.
  • Fig. 1 shows a hand tool 2 in the form of a hammer drill, which has a tool holder 6, which is held on a tool spindle 8 at a standing in the direction of RA of the power tool 2 end of a merely indicated housing 4.
  • the tool spindle 8 can be acted upon by a hammer blower 10 with a pulse-like recurring impact force.
  • the hammer blower 10 on a racket 12 which is displaceable in a guide sleeve 14 by a field piston 16 in a reciprocating motion in which he repeats on a functioning as a kind of anvil 18 rear end of the tool spindle 8.
  • the hammer blower 10 has a wobble device 20 for the reciprocating drive of the exciter piston 16.
  • the wobble device 20 essentially comprises a drive element 22 in the form of a wobble drum pressed onto an intermediate shaft 24 and an output element 26 in the form of a wobble plate coupled to the exciter piston 16, which in operation performs a reciprocating pivoting movement S about a wobble axis T.
  • the output element 26 is coupled to the drive element 22 via spherical rolling elements 28 of a wobble bearing 30.
  • the outer surface 32 of the drive element 22 has a spherical basic shape and acts as a drive-side storage area, in which a drive-side guide 34 is recirculated for the rolling elements 28.
  • the drive-side guide 34 is aligned with respect to a drive axis A of the intermediate shaft 24 and the drive element 22 inclined.
  • the driven element 26 has an inner wall 36 serving as a driven-side bearing area with a cylindrical basic shape into which an output-side guide 38 for the rolling elements 28 is centrally embedded. This inner wall 36 defines a receiving space in which the drive element 22 is mounted.
  • a transmission sleeve 42 is set in rotary motion about the guide sleeve 14 via the intermediate shaft 24.
  • this rotational movement is transmitted to the tool spindle 8, whereby this is acted upon in addition to the impact pulse simultaneously with a torque M and the hand tool 2 is thus available for a hammer drill application.
  • Fig. 2 to 5 shows, various embodiments of the wobble device 20 , in which the stability of the respective wobble bearing 30 is increased by a one-sided cross-sectional enlargement of the basic shape of the respective storage area.
  • Fig. 2 shows the wobble device 20 in an embodiment in which a for mounting the output element 26 on the drive element 22 with the interposition of the rolling elements 28 required inner diameter IDM of the inner wall 36 is provided on a side facing away from the working direction RA 46 of the output-side guide 38.
  • the assembly of the wobble device 20 can take place by means of a relative movement of the drive element 22 relative to the output element 26 along the mounting direction RM.
  • the cylindrical inner wall 36 On the side 48 in the working direction RA of the driven-side bearing area with respect to the driven-side guide 38, the cylindrical inner wall 36, on the other hand, has an inner diameter IDV which is reduced in relation to the inner diameter IDM and enlarges the cross-section of the driven-side bearing area. In this way, the breaking strength of the driven-side bearing area is increased on the side 48 in the working direction RA.
  • Fig. 3 shows the wobble device 20 in an embodiment in which the required for mounting the output element 26 on the drive element 22 with the interposition of the rolling elements 28 inner diameter IDM 'of the inner wall 36 on the working direction RA facing side 46 of the output-side guide 38 is provided.
  • the assembly of the wobble device 20 in this embodiment by a relative movement of the drive element 22 relative to the output element 26 along the mounting direction RM 'done.
  • the cylindrical inner wall 36 On the side 46 of the driven-side bearing area facing away from the working direction RA with respect to the output-side guide 38, the cylindrical inner wall 36 now has the inner diameter IDV ', which is reduced relative to the inner diameter IDM, by which the cross-section of the output-side bearing area is increased. This way will increases the breaking strength of the output-side bearing area on the side 46 facing away from the working direction RA.
  • Fig. 4 shows the wobble device 20 in an embodiment in which a for mounting the output element 26 on the drive element 22 with the interposition of the rolling elements 28 maximum possible outer diameter ADM of the surface 32 of the drive-side bearing area on one of the working direction RA facing side 50 of the drive-side guide 34 is provided.
  • the assembly of the wobble device 20 can take place by means of a relative movement of the drive element 22 relative to the output element 26 along the mounting direction RM.
  • the surface 32 On the side 52 of the drive-side bearing area of the drive-side guide 34, which faces away from the working direction RA, the surface 32 now has an outer diameter ADV which is larger than the outer diameter ADM and enlarges the cross-section of the drive-side bearing area. In this way, the breaking strength of the drive-side bearing area is increased on the side 52 facing away from the working direction RA.
  • Fig. 5 shows the wobble device 20 in a non-inventive embodiment, in which for mounting the output element 26 on the drive element 22 with the interposition of the rolling elements 28 maximum possible outside diameter ADM 'of the surface 32 on the opposite side of the working direction RA side 52 of the drive-side bearing area with respect to the drive-side guide 34 is provided.
  • ADM 'of the surface 32 on the opposite side of the working direction RA side 52 of the drive-side bearing area with respect to the drive-side guide 34 is provided.
  • the surface 32 On the side 50 of the drive-side guide 34 which is in the working direction RA, the surface 32 now has an outer diameter ADV 'which is larger than the outer diameter ADM' and through which the cross-section of the drive-side Warehouse area is increased. In this way, the breaking strength of the drive-side bearing area is increased on the side 50 in the working direction RA.
  • either the embodiment according to 4 or FIG. 5 be provided to the side 50; 52 of the drive-side storage area to reinforce, which is the most heavily loaded during operation.
  • 50 is used for mounting the wobble device 20.
  • the spherical basic shape of the surface 32 remains on both sides 50, 52 of the output-side storage area.

Claims (5)

  1. Appareil portatif (2) comprenant un dispositif basculant (20) qui comporte un élément menant (22) apte à tourner autour d'un axe d'entraînement (A) et un élément mené (26) couplé à l'élément menant (22) par l'intermédiaire d'un palier basculant (30) et maintenu avec une possibilité de pivotement en va-et-vient alterné autour d'un axe de pivotement (T), le palier basculant (30) comportant, sur l'élément menant (22), une zone de palier côté menant pourvue d'un guide côté menant (34) périphérique à l'axe d'entraînement (A), sur l'élément mené (26), une zone de palier côté mené pourvue d'un guide côté mené (38) périphérique à l'axe d'entraînement (A), et des éléments de roulement (28) guidés simultanément dans chacun des deux guides (34, 38), le palier basculant (30) comportant dans une des zones de palier, sur un premier côté (46, 48 ; 50, 52), au niveau du guide correspondant (34 ; 38), une augmentation de section transversale par rapport à un second côté (48, 46 ; 52, 50) de la zone de palier, caractérisé en ce que l'augmentation de section transversale dans la zone de palier côté mené est formée par un diamètre intérieur réduit (IDV ; IDV') du premier côté (48 ; 46) de la zone de palier côté mené, au niveau du guide côté mené (38), par rapport au second côté (46 ; 48) de la zone de palier côté mené.
  2. Appareil portatif selon la revendication 1, caractérisé en ce que l'augmentation de section transversale est formée par un accroissement périphérique de section transversale de la zone de palier sur le premier côté (46, 48 ; 50, 52) par rapport au second côté (48, 46 ; 52, 50).
  3. Appareil portatif selon la revendication 1, caractérisé en ce que, aussi bien sur le premier côté (48 ; 46) que sur le second côté (46 ; 48), la zone de palier côté mené est de conformation cylindrique.
  4. Appareil portatif selon une des revendications 1 à 3, caractérisé en ce que l'augmentation de section transversale est formée par un diamètre extérieur accru (ADV ; ADV') du premier côté (52 ; 50) de la zone de palier côté menant au niveau du guide côté menant (34) par rapport au second côté (50 ; 52) de la zone de palier côté menant.
  5. Appareil portatif selon la revendication 4, caractérisé en ce que, aussi bien sur le premier côté (52, 50) que sur le second côté (50, 52), la zone de palier côté mené est de conformation sphérique.
EP06112544A 2005-04-25 2006-04-12 Outil portatif avec entraînement à basculement Active EP1716980B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102005019196A DE102005019196A1 (de) 2005-04-25 2005-04-25 Handwerkzeuggerät mit Taumeleinrichtung

Publications (2)

Publication Number Publication Date
EP1716980A1 EP1716980A1 (fr) 2006-11-02
EP1716980B1 true EP1716980B1 (fr) 2009-03-11

Family

ID=36659967

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06112544A Active EP1716980B1 (fr) 2005-04-25 2006-04-12 Outil portatif avec entraînement à basculement

Country Status (5)

Country Link
US (1) US7404451B2 (fr)
EP (1) EP1716980B1 (fr)
JP (1) JP2006305724A (fr)
CN (1) CN1853866B (fr)
DE (2) DE102005019196A1 (fr)

Families Citing this family (18)

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Publication number Priority date Publication date Assignee Title
DE102007000081A1 (de) * 2007-02-08 2008-08-21 Hilti Ag Handwerkzeugmaschine mit pneumatischem Schlagwerk
DE102007009985A1 (de) * 2007-03-02 2008-09-25 Robert Bosch Gmbh Handwerkzeugmaschine
DE102007049738B3 (de) * 2007-10-16 2008-12-24 Ab Skf Wälzlagerung
JP5056584B2 (ja) * 2008-05-26 2012-10-24 マックス株式会社 駆動工具
WO2010010474A1 (fr) * 2008-07-21 2010-01-28 Trevor Charles Crozier Scie motorisée rotative
DE102009017750B4 (de) * 2009-04-16 2011-02-10 Aktiebolaget Skf Taumellageranordnung
US20110194796A1 (en) * 2010-02-05 2011-08-11 Schaeffler Technologies Gmbh & Co. Kg Angled Bore Bearing
US8636081B2 (en) 2011-12-15 2014-01-28 Milwaukee Electric Tool Corporation Rotary hammer
CN102933352A (zh) * 2010-06-09 2013-02-13 博世电动工具（中国）有限公司 冲击机构
US20110308829A1 (en) * 2010-06-18 2011-12-22 Jiangsu Hehui Electronic Tools Co., Ltd. Nail gun
DE102011010745A1 (de) * 2011-02-09 2012-08-09 Robert Bosch Gmbh Werkzeugmaschine mit einer hin- und hergehenden Abtriebsspindel
CN102416582B (zh) * 2011-08-06 2013-09-11 台州市恒大刀刃具有限公司 自动定向装置
DE102012206451B4 (de) * 2012-04-19 2020-12-10 Hilti Aktiengesellschaft Handwerkzeugmaschine
DE102012206445A1 (de) * 2012-04-19 2013-10-24 Hilti Aktiengesellschaft Werkzeugmaschine
US10328560B2 (en) 2015-02-23 2019-06-25 Brian Romagnoli Multi-mode drive mechanisms and tools incorporating the same
DE102015203487A1 (de) * 2015-02-26 2016-09-01 Ecoroll Ag Werkzeugtechnik Festhammervorrichtung zum Beeinflussen von Werkstücken und zugehöriges Verfahren
CN111300322A (zh) * 2020-03-17 2020-06-19 广东电网有限责任公司 一种电动拧紧工具
CN113813156A (zh) * 2021-08-06 2021-12-21 上海清透智能科技有限公司 一种低偏摆筋膜枪

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Also Published As

Publication number Publication date
CN1853866B (zh) 2011-08-24
US7404451B2 (en) 2008-07-29
DE502006003052D1 (de) 2009-04-23
JP2006305724A (ja) 2006-11-09
CN1853866A (zh) 2006-11-01
EP1716980A1 (fr) 2006-11-02
DE102005019196A1 (de) 2006-10-26
US20060266139A1 (en) 2006-11-30

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