EP2655018A1 - Machine-outil à main - Google Patents

Machine-outil à main

Info

Publication number
EP2655018A1
EP2655018A1 EP11805460.0A EP11805460A EP2655018A1 EP 2655018 A1 EP2655018 A1 EP 2655018A1 EP 11805460 A EP11805460 A EP 11805460A EP 2655018 A1 EP2655018 A1 EP 2655018A1
Authority
EP
European Patent Office
Prior art keywords
bearing
tolerance compensation
compensation unit
hand tool
tool according
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.)
Withdrawn
Application number
EP11805460.0A
Other languages
German (de)
English (en)
Inventor
Juergen Dietel
Andreas Schlegel
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
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP2655018A1 publication Critical patent/EP2655018A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D16/00—Portable percussive machines with superimposed rotation, the rotational movement of the output shaft of a motor being modified to generate axial impacts on the tool bit
    • B25D16/006—Mode changers; Mechanisms connected thereto
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2211/00—Details of portable percussive tools with electromotor or other motor drive
    • B25D2211/06—Means for driving the impulse member
    • B25D2211/061—Swash-plate actuated impulse-driving mechanisms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2216/00—Details of portable percussive machines with superimposed rotation, the rotational movement of the output shaft of a motor being modified to generate axial impacts on the tool bit
    • B25D2216/0069—Locking 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
    • B25D2250/005—Adjustable tool components; Adjustable parameters
    • 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
    • B25D2250/045—Cams used in percussive 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

Definitions

  • the invention relates to a hand tool, in particular a drill and / or chisel, with a pressure lever, which is intended to perform a switching operation.
  • the handheld power tool has a tolerance compensation unit which is provided to effect a tolerance compensation via a change in position of at least one contact surface.
  • a “pressure lever” is to be understood as meaning a lever which transmits a movement from one component to another component, in particular transversely to a direction of force, so that the pressure lever is subjected to bending during transmission and performs a switching operation
  • Switchching process is to be understood in particular a process in which by the transmission of a movement a clutch is switched on and / or off, and / or a transmission ratio of a transmission device is changed.
  • a pressure lever a lever that transmits a switching movement of a hammer tube of a striking mechanism of a hand tool on a drive bearing a drill and / or chisel hammer. This movement performs a switching operation of a coupling integrated in the drive bearing, which activates or deactivates the impact mechanism.
  • a “tolerance compensation unit” is to be understood as a unit which is intended, in particular, to compensate for manufacturing and / or assembly-related tolerances of components transmits another component.
  • the tolerance compensation unit is provided to effect a change in position of at least one contact surface of the pressure lever.
  • This can advantageously be achieved that manufacturing and / or assembly tolerances of a hammer tube and / or a drive bearing and / or the Andschreibhebels can be compensated so that between the contact surface of the Andschreibhebels with the hammer tube and / or the contact surface of the Andschreibhebels with the drive bearing sets a desired game and a proper function is guaranteed.
  • further transmission elements can be arranged, such as bearings, in particular needle bearings and / or bearing washers.
  • the contact surface can thus be decoupled, for example, from a rotational movement.
  • the pressure lever is mounted via a bearing axis, wherein the tolerance compensation unit has at least one bearing arrangement which is provided to support the bearing axis of the pressure lever in a plurality of defined positions.
  • a “bearing axis” is to be understood as meaning an axis on which the pressure lever is rotatably mounted.
  • “Store in a plurality of defined positions” is understood to mean that the bearing arrangement is intended to support the bearing axis at different positions Example that the bearing axis can be moved and / or rotated within a designated area and that a selected position can be determined by force and / or positive locking.
  • the bearing unit may have a clamping device, which is intended to fix a position by force fit, and / or a locking device, wherein a locking element defines a position by snapping.
  • the storage unit may have one or more receiving areas, which are designed so that the position of the bearing axis can be determined by repositioning.
  • the position of a contact surface of the pressure lever can be determined by a change in position of the bearing axis of the pressure lever.
  • the so set tolerance compensation unit can reliably comply with this setting and unwanted adjustment can be avoided.
  • the bearing assembly is at least partially formed integrally with a power tool housing.
  • integral is to be understood to mean, in particular, materially bonded, for example, by a welding process and / or adhesive process, etc., and particularly advantageously formed, such as by casting and / or die casting
  • the bearing assembly may comprise a pin-shaped bolt on which the provided with a recess bearing axis can be inserted.
  • the bearing arrangement can have a receiving region, which is formed as a recess and into which one end of the bearing axis can be inserted. This allows a particularly reliable attachment of the bearing assembly can be achieved on the power tool housing. It is a cost-effective production possible, and it can be saved components and assembly costs.
  • the bearing axis is rotatably mounted.
  • rotatably mounted is to be understood in particular that the bearing unit contains a rotatably mountednacbe-0 rich, which receives the bearing axis or the bearing axis in one
  • Receiving area is rotatably mounted.
  • an adjustment movement of the bearing axis can be realized, which is suitable for effecting a change in position of a contact surface of the pressure lever.
  • the tolerance compensation unit has an eccentric.
  • An "eccentric" is to be understood in particular as meaning a contour of a component whose symmetry axis is shifted relative to a symmetry of a main contour and / or an axis of rotation of this component of
  • the bearing axis comprises the eccentric.
  • the bearing axis has an eccentric 5 on at least one, preferably on both ends.
  • the bearing axis has a cylindrical central part and o at least one end with a non-rotating contour.
  • a "non-rotating contour” should be understood to mean a contour which prevents a rotational movement by means of a positive fit.
  • Figure may in particular be formed as a polygon.
  • the contour may be formed as a triangle, hexagon, but preferably as a quadrangle Aus-5 tion to be formed and trained on an outer contour
  • the contour is formed as an outer contour
  • the bearing assembly has a recess with a coordinated inner contour as a receiving area. Due to the cylindrical middle part, an advantageous, movable mounting of the pressure lever can be achieved.
  • the bearing unit may be designed so that the bearing unit contains a rotatably mounted receiving area, in particular an eccentrically rotatably mounted receiving area, and the position change is performed by rotating the receiving area.
  • the bearing unit is designed so that the receiving area is fixedly mounted and the bearing axis is moved by repositioning to a next position.
  • the tolerance compensation unit has a fixing unit which is provided to fix a movably mounted adjustment means of the tolerance compensation unit in different positions.
  • a "fixing unit” is to be understood as a unit which is intended to fix a position by form and / or frictional connection, for example by a clamping device and / or by a latching device in which a latching element fixes a position by latching
  • the fixing unit can be designed so that it can be released by an operator, which advantageously allows the tolerance compensation unit to be readjusted simply in order to readjust a tolerance.
  • the portable power tool housing has at least one service opening which is provided for adjusting the tolerance compensation unit from the outside.
  • a “service opening” is to be understood as meaning an area of the handheld power tool housing which can be easily opened by the operator, for example a cover cap. Opening the operator can reach an adjustment of the tolerance compensation unit and perform an adjustment. This allows the operator to readjust a tolerance if necessary. As a result, the service life of the power tool can advantageously be increased and a service can be carried out easily. It can also be provided several service openings, in particular two service openings. The service openings are advantageously provided in each bearing assembly of the tolerance compensation unit, so that each bearing assembly can be adjusted by an operator.
  • the bearing axis can be taken with ends in the bearing assembly, which have a rotatable contour. It can be advantageously achieved that the bearing assemblies can be adjusted individually.
  • the tolerance compensation unit can also be designed so that the pressure lever is received directly from the bearing assemblies. It can be dispensed with a bearing axis and other components can be saved.
  • FIG. 1 is a schematic representation of a hand tool with a tolerance compensation unit according to the invention
  • FIG. 2 shows a detail of a schematic illustration of a hand-held power tool with the tolerance compensation unit according to the invention
  • FIG. 3 is a schematic representation of a detail of a bearing assembly of the tolerance compensation unit according to the invention.
  • FIG. 6 is a schematic representation of an eccentric of the bearing axis
  • FIG. 7 shows a detail of a schematic illustration of the handheld power tool with a tolerance compensation unit according to the invention in a second exemplary embodiment
  • FIG. 8 shows a schematic illustration of a bearing axle in a second exemplary embodiment.
  • Figure 1 and Figure 2 show a hand tool, which is designed as a hammer drill, with a pressure lever 10a, which is intended to perform a switching operation, and with a tolerance compensation unit 12a, the is provided to cause a tolerance change over a change in position of a contact surface 14a.
  • the hand tool machine has a hand tool housing 20a, which comprises two housing shells 68a.
  • an electric motor 36a drives a bevel gear 40a via a pinion 38a.
  • the bevel gear 40a drives, via an intermediate shaft 42a, a pinion 44a which drives a hammer tube 48a via a toothed wheel 46a.
  • the expert transmission device for transmitting the rotational movement from the motor 36a provided on the intermediate shaft 42a.
  • the hammer tube 48 a drill chuck 50 a is rotated.
  • the hammer tube 48a is displaced in the direction of the bevel gear 40a by the pressure exerted during a drilling operation.
  • a force is exerted on a drive bearing 52a via the pressure lever 10a.
  • a clutch, not shown, in the interior of the drive bearing 52a establishes a force flow between the bevel gear 40a and a bearing sleeve 54a, so that a wobble finger 56a acts on a piston 58a of a percussion mechanism 60a and reciprocates it reciprocally.
  • the hammer tube 48a moves in the opposite direction from the bevel gear 40a, so that the drive bearing 52a is relieved again, the clutch not shown in the drive bearing 52a see the power flow between bevel gear 40a and bearing sleeve 54a interrupts and the impact mode is turned off.
  • the tolerance compensation unit 12a is provided to cause a change in position of the contact surfaces 14a of the Andrückhebels 10a.
  • the pressure lever 10a is mounted via a bearing axis 16a.
  • the tolerance compensation unit 12a has a bearing arrangement 18a, which is provided to support the bearing axis 16a of the pressure lever 10a in a plurality of defined positions.
  • the bearing assembly 18a ( Figures 3, 4 and 5) is integrally formed with the power tool housing 20a.
  • the tolerance compensation unit 12a has an eccentric 22a.
  • the bearing shaft 16a comprises the Ex Center 22a.
  • the bearing shaft 16a has a cylindrical central part 24a and two ends 26a with a non-rotating contour 28a.
  • the cylindrical middle part 24a serves for the movable mounting of the pressing lever 10a.
  • the two ends 26a are formed as external square 62a, which is arranged as an eccentric 22a eccentrically to a central axis 64a of the bearing axis 16a (FIG. 6).
  • the bearing arrangement 18a has recesses in the form of a square socket 66a in the housing shells 68a of the hand-held power tool housing 20a.
  • the outer square 62a of the bearing shaft 16a can be inserted in four different positions in the inner square 66a of the bearing assembly 18a. Each of these positions corresponds to a different position of the contact surfaces 14a through the eccentric 22a.
  • the central axis 64a is shifted by -0.3, -0.1, 0.1 and 0.3 mm.
  • the bearing shaft 16a is first inserted in a middle position in the Lageranordung 18a and then determines the game between the contact surfaces 14a, the drive bearing 52a and the hammer tube 48a.
  • a mark 74a in the form of a triangle shows the orientation of the bearing axis 16a.
  • a point, a dash or a notch or a chamfered surface may be attached as marking 74a to the bearing axis 16a.
  • the bearing shaft 16a By the bearing shaft 16a is then inserted forward or backward rotated by 90 ° or 180 °, the game can be increased or decreased.
  • the eccentrics 22a are mounted at both ends 26a with the same offset, so that the bearing shaft 16a can be used on both sides. If a stronger tolerance compensation is necessary, the bearing axle 16a can also be exchanged for another bearing axle with another eccentric.
  • the changing over of the bearing axis 16a can be done without having to disassemble further components. In particular, an expansion of the intermediate shaft 42a can be avoided.
  • a bearing arrangement 18b as adjustment means 32b has a bearing shell 70b, in which a inner square 66b, which receives an outer square 62b of the bearing shaft 16b, is mounted.
  • the bearing shell 70b can be rotated in the bearing assembly 18b.
  • the inner square 66b is arranged eccentrically with respect to a rotation axis 72b of the bearing shell 70b.
  • Two ends 26b of the bearing shaft 16b are formed as external square 62b, which is arranged centrally to a central axis 64b of the bearing axis 16b ( Figure 8).
  • a position of a cylindrical central part 24b of the bearing shaft 16b can be changed by turning the bearing shell 70b and a change in position of one of the contact surfaces 14b can be achieved.
  • the tolerance compensation unit 12b has a fixing unit 30b, which is provided to fix the movably mounted adjustment means 32b of the tolerance compensation unit 12b in different positions.
  • the fixing unit 30b is formed as a latching unit with a detent ball 80b, which is pressed by a spring, not shown, in locking recesses 82b of the bearing shell 70b.
  • the locking unit is designed so that the bearing shell 70b snaps into one position in four turns.
  • the latching unit can also be designed such that the fixing unit engages, for example, at six, eight or a different number of positions.
  • a portable power tool housing 20b has a service opening 34b with a removable cover 76b, which is provided to adjust the tolerance compensation unit 12b from the outside.
  • the cover 76b has a slot 78b for unscrewing it by an operator.
  • the operator turns the bearing shell 70b to a next latching position of the latching unit until a desired tolerance compensation is achieved.
  • the inner square 66b is designed so long that a tool with an external square for adjusting the bearing shell 70b can be used.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Press Drives And Press Lines (AREA)
  • Hand Tools For Fitting Together And Separating, Or Other Hand Tools (AREA)

Abstract

L'invention concerne une machine-outil à main, notamment un marteau perforateur et/ou un marteau-piqueur, avec un levier de pression (10a, b) qui sert à effectuer une opération de commutation. Selon l'invention, une unité de compensation des tolérances (12a, b) est utilisée pour provoquer une compensation des tolérances par modification de la position d'au moins une surface d'appui (14a, b).
EP11805460.0A 2010-12-21 2011-12-15 Machine-outil à main Withdrawn EP2655018A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010063621A DE102010063621A1 (de) 2010-12-21 2010-12-21 Handwerkzeugmaschine
PCT/EP2011/072850 WO2012084669A1 (fr) 2010-12-21 2011-12-15 Machine-outil à main

Publications (1)

Publication Number Publication Date
EP2655018A1 true EP2655018A1 (fr) 2013-10-30

Family

ID=45463558

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11805460.0A Withdrawn EP2655018A1 (fr) 2010-12-21 2011-12-15 Machine-outil à main

Country Status (6)

Country Link
US (1) US20140000923A1 (fr)
EP (1) EP2655018A1 (fr)
CN (1) CN103260829B (fr)
DE (1) DE102010063621A1 (fr)
RU (1) RU2013133716A (fr)
WO (1) WO2012084669A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE537591C2 (sv) 2013-11-07 2015-07-07 Bae Systems Bofors Ab Ammunitionshanteringssystem och metod för sortering av blandade ammunitionstyper i ett magasin
DE102015204231B4 (de) * 2015-03-10 2021-03-18 Robert Bosch Gmbh Werkzeug und Verfahren zum Behandeln eines Werkstücks mit einem Werkzeug
CN106737436B (zh) * 2016-12-21 2023-08-25 南京汤峰机电有限公司 一种冲击钻的冲击功能切换机构
CN110153919A (zh) * 2019-06-13 2019-08-23 中科宝航(上海)智能技术研究有限公司 用于定位支撑的电动锁球装置
US11318596B2 (en) * 2019-10-21 2022-05-03 Makita Corporation Power tool having hammer mechanism

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3504650A1 (de) * 1985-02-12 1986-08-14 Robert Bosch Gmbh, 7000 Stuttgart Bohrhammer

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3626768A (en) * 1969-09-02 1971-12-14 Joseph J Dancsik Tool drive assembly
US3934688A (en) * 1974-09-11 1976-01-27 The Black And Decker Manufacturing Company Shifter mechanism
DE3506695A1 (de) * 1985-02-26 1986-08-28 Robert Bosch Gmbh, 7000 Stuttgart Bohrhammer
DE4231986A1 (de) * 1992-09-24 1994-03-31 Bosch Gmbh Robert Bohr- und/oder Schlaghammer
CN2295559Y (zh) * 1997-04-04 1998-10-28 江天二 手电钻、冲击电钻钻头修整装置
JP3976187B2 (ja) * 2002-11-20 2007-09-12 株式会社マキタ ハンマードリル
DE102004050800A1 (de) * 2004-10-19 2006-04-20 Robert Bosch Gmbh Exzentergetriebe mit einem Umwuchtausgleichselement
EP1690640B1 (fr) * 2005-02-10 2013-03-06 Black & Decker Inc. Machine portative à percussion
GB0613181D0 (en) * 2006-07-01 2006-08-09 Black & Decker Inc Pavement breaker
JP2008012666A (ja) * 2006-07-01 2008-01-24 Black & Decker Inc ハンマードリル用のシリンダー支持構造体
DE102007018928A1 (de) * 2007-04-21 2008-10-23 Schaeffler Kg Kompensationsvorrichtung
DE102007062260A1 (de) * 2007-12-21 2009-06-25 Robert Bosch Gmbh Handwerkzeugmaschine

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3504650A1 (de) * 1985-02-12 1986-08-14 Robert Bosch Gmbh, 7000 Stuttgart Bohrhammer

Also Published As

Publication number Publication date
RU2013133716A (ru) 2015-01-27
WO2012084669A1 (fr) 2012-06-28
US20140000923A1 (en) 2014-01-02
DE102010063621A1 (de) 2012-06-21
CN103260829A (zh) 2013-08-21
CN103260829B (zh) 2016-09-07

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