EP2190630B1 - Hand-held power tool with a handle vibration-damped by compensating means - Google Patents

Hand-held power tool with a handle vibration-damped by compensating means Download PDF

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Publication number
EP2190630B1
EP2190630B1 EP08774815.8A EP08774815A EP2190630B1 EP 2190630 B1 EP2190630 B1 EP 2190630B1 EP 08774815 A EP08774815 A EP 08774815A EP 2190630 B1 EP2190630 B1 EP 2190630B1
Authority
EP
European Patent Office
Prior art keywords
compensating means
lever arm
power tool
movable compensating
portable power
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.)
Not-in-force
Application number
EP08774815.8A
Other languages
German (de)
French (fr)
Other versions
EP2190630A1 (en
Inventor
Gerhard Meixner
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 EP2190630A1 publication Critical patent/EP2190630A1/en
Application granted granted Critical
Publication of EP2190630B1 publication Critical patent/EP2190630B1/en
Not-in-force 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
    • 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
    • B25F5/02—Construction of casings, bodies or handles
    • 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
    • B25D2211/068—Crank-actuated impulse-driving mechanisms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2217/00—Details of, or accessories for, portable power-driven percussive tools
    • B25D2217/0073—Arrangements for damping of the reaction force
    • B25D2217/0076—Arrangements for damping of the reaction force by use of counterweights
    • B25D2217/0092—Arrangements for damping of the reaction force by use of counterweights being spring-mounted
    • 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
    • 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
    • B25D2250/375—Fluid springs
    • 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
    • Y10T403/32—Articulated members
    • Y10T403/32606—Pivoted

Definitions

  • the invention relates to a hand tool according to the preamble of the independent claim.
  • the hand tool has a, arranged in a machine housing drive device for driving a tool.
  • the drive device and / or the tool generate vibrations which are transmitted as vibrations to a machine operator.
  • the hand tool also has a, via a movable compensating means vibration damped handle.
  • the movable compensating means is arranged in the machine housing and / or in the handle, wherein the movable compensating means is designed as a movably mounted counterweight.
  • the inertia of the counterweight has a damping effect on the amplitude of the vibrations.
  • a power tool is for example from the SU 893 515 A1 known.
  • handles are used.
  • the handle is decoupled via the spring / damper system from the vibratory machine housing.
  • split, spring-loaded and / or damped housings are used to decouple the housing from the vibratory-excited components, such as the drive device.
  • Such handles are for example from the GB 2 171 045 A or the DE 10 2004 041 29 A1 known.
  • the portable power tool according to the invention has at least one movable compensating means, which is operatively connected to the handle and / or the machine housing via a deflection system in such a way that at least one degree of freedom of the movable compensating means extends substantially in a main axis of oscillation of the machine housing.
  • a deflection system By the deflection system, an effect of the movable Ausgleiehskars is realized on the handle.
  • the effect brought about by the deflection system interaction between handle and movable compensating means has the advantage that the movable compensating means can be constructed very compact and provided with low mass. As a result, an advantageous, particularly compact design of the hand tool of the invention can be achieved.
  • a further advantage is that the movable compensating means does not contribute significantly to the total weight of the hand tool, i. the handling of a, according to the invention vibration-damped hand tool is noticeably improved.
  • the deflection system has at least one, preferably two rotatably connected, lever arms.
  • a reactive force caused by the drive device and / or the tool acts on a first lever arm.
  • a particularly cost-effective and compact design of the portable power tool according to the invention can be achieved by the action of a second lever arm on the movable compensating means.
  • the deflection system is constructed from two lever arms.
  • a lever arm is preferably rigidly connected to the handle.
  • the second lever arm is mounted with a rotary bearing point connected to the machine housing.
  • the rotatable engagement point is arranged at a distance A to this pivot point.
  • the distance A acts advantageously as an additional tuning parameter for the damping system.
  • a first lever arm is preferably rigidly connected to the machine housing. Through a passage opening in the handle of the first lever arm engages a rotatable point on the second lever arm.
  • the second lever arm is rotatably mounted in a pivot bearing point connected to the handle.
  • the rotatable engagement point is located at a distance A to the pivot bearing point.
  • a particularly cost-effective embodiment of a hand tool according to the invention can be realized by the fixed connection between the second lever arm and the movable compensating means.
  • the second lever arm and the movable compensation means are made in one piece.
  • the third lever arm at a distance B from the rotatable engagement point is rotatably connected to the second lever arm.
  • the third lever arm now acts on the movable compensating means.
  • a compact embodiment of a deflection system according to the invention with three lever arms can be achieved in that the third lever arm is fixedly connected to the movable compensating means.
  • the third lever arm is made in one piece with the movable compensating means.
  • a particularly compact design which at the same time can be adapted to the given installation space, is achieved by the use of at least one cable pull device in the deflection system.
  • a deflection system with at least one pressure-element system can be used flexibly with regard to installation space and at the same time has a particularly good tunability of the damping properties.
  • An advantageous development of the hand tool of the invention can be achieved by an arrangement of at least one, preferably two return elements on the movable compensating means. Upon a deflection of the movable compensating means from a rest position, the restoring element exerts a restoring force FR on the movable compensating means. As a result, degrees of freedom for the design of the damping system are advantageously obtained.
  • a further advantageous further development of the portable power tool according to the invention can be realized by the arrangement of at least one, preferably two damping elements on the movable compensating means.
  • the damping element acts to dampen the movement of the movable compensating means.
  • this results in degrees of freedom in the design of the damping system.
  • the damping system of the hand tool according to the invention can be ideally adapted to the load profile.
  • the hand tool (10) shown in the examples is an electrically operated hand tool.
  • This has at least one drive device (12) comprising at least one electric motor (12a) with at least one motor shaft (12b) and at least one gear device (12c) coupled to the motor shaft (12b).
  • the transmission device (12c) at least the implementation of a rotational movement of the motor shaft (12b) in a transverse movement along a machine axis defined by the axis (12d).
  • the hand tool (10) can be designed as a chisel and / or hammer drill, wherein the drive device (12) for Actuation of a hammer impact mechanism (13) is used.
  • Further examples of hand-held power tools (10) with at least one alternating drive between two end positions of a tool are impact wrenches, percussion drills, stab, foxtail or reciprocating saws.
  • hand tool (10) according to the invention comprises a machine housing (14) and a with the machine housing (14) connected to the handle (16).
  • the drive device (12) is arranged in the machine housing (14).
  • the drive device (12) is indicated schematically here as a hammer impact mechanism (13).
  • the handle (16) is connected via a spring element (18) with the machine housing (14).
  • the handle (16) additionally or alternatively via at least two spring elements and / or at least one, two or more damping elements with the machine housing (14) are connected.
  • the hand tool (10) has a deflection system (20).
  • the deflection system (20) comprises a first lever arm (22) and a second lever arm (24).
  • the first lever arm (22) is rigidly connected to the handle (16). Through an engagement opening (26) of the first lever arm (22) projects into the machine housing (14).
  • the first lever arm can also be connected elastically, rotatably and / or displaceably with the handle (16).
  • the second lever arm (24) of the deflection system (20) is arranged in the machine housing (14).
  • the movable compensating means (30) is designed as a counterweight (31).
  • the counterweight (31) is arranged at the arm end (32) of the second lever arm (24) remote from the pivot point (28).
  • the counterweight (31) is fixedly connected to the second lever arm (24).
  • the function of the hand tool (10) according to the invention will be explained.
  • the drive device (16) acts as a repulsive force (35) designated reactive force (36) on the machine housing (14).
  • the vibrations generated thereby preferably propagate along a major axis of vibration (38) in the machine housing (14).
  • the effect of the movable compensating means (30) can be influenced during the design of the power tool (10).
  • the distances A and B thus act as design parameters.
  • FIG. 2 shows a development of the hand tool of the invention (10) as a second embodiment. Same elements are the same name and provided with the same reference numbers.
  • a third lever arm (42) rotatably connected to the arm of the pivot point (28) remote end (32) of the second lever arm (24).
  • the third lever arm (42) is guided here two guide elements (44) parallel to the main axis of vibration (38).
  • a development of the hand tool (10) according to the invention results from the use of bearing elements such as sliding, needle, roller or roller bearings to improve the friction properties of the guide elements (44).
  • the third lever arm (42) acts on the movable compensating means (30), designed here as a counterweight (31).
  • the counterweight (31) is fixedly connected to the third lever arm (42).
  • the counterweight (31) and the third lever arm (42) can be made in one piece.
  • the guidance of the third lever arm (42) in the guide elements (44) ensures that the movable compensating means (30) is movable only in the direction of the main axis of vibration (38). As a result, it has a particularly efficient damping effect on vibrations along the main axis of oscillation (38).
  • FIG. 3 A preferred further development of the hand tool (10) according to the invention is in FIG. 3 shown.
  • the same elements are denoted the same and provided with the same reference numbers.
  • At least two return (48) and / or damping elements (50) are arranged in the direction of the degree of freedom (46) of the movable compensating means (30).
  • the restoring (48) and / or damping elements (50) thus act in the direction of the degree of freedom (46) on the movable compensating means (30).
  • the return elements (48) are in FIG. 3 implemented in a particularly preferred form as spring elements (49).
  • the restoring elements (48) Upon a deflection of the movable compensating means (30) from a rest position, the restoring elements (48) generate a restoring force FR on the movable compensating element (30). This tries to put the movable compensating means (30) in the rest position.
  • Variants of this exemplary embodiment of a handheld power tool (10) according to the invention result in particular by varying the number of reset (48) and / or damping elements (50), in particular to one, three, four or more reset (48) and / or damping elements (50 ).
  • a particularly preferred variant results from the combination of at least one restoring (48) and at least one damping elements.
  • Further embodiments result from varying the connection means of the restoring (48) and / or damping elements (50) to the movable compensating means or the machine housing.
  • the restoring (48) and / or damping elements (50) can be firmly connected to the movable compensating means or the machine housing or rest only against them.
  • FIG. 4 a further embodiment of a hand tool (10) according to the invention is shown, in which the movable compensating means (30) in the handle (16) is arranged.
  • the same elements are denoted the same and provided with the same reference numbers.
  • the handle (16) is supported on the machine housing via a first (18) and a second spring element (19).
  • the first lever arm (22) is rigidly connected to the machine housing (14).
  • the handle (16) has a passage opening (52) through which the first lever arm (22) is guided into the handle (16).
  • the second lever arm (24) is pivotally mounted in a pivot bearing point (28) rigidly connected to the handle (16).
  • the first lever arm (22) engages the second lever arm (24) in a rotatable engagement point (34).
  • the rotatable engagement point (34) is arranged at a distance A to the pivot bearing point (28) on the second lever arm (24).
  • connection arise in particular by selecting the connection of the first lever arm (22) with the machine housing and / or the second lever arm (24) with the handle.
  • the connection can be made elastic, torsionally elastic and / or displaceable.
  • the movable compensating means (30) is disposed at an arm end (32) of the second lever arm (24) remote from the rotatable engagement point (34).
  • the drive device (16) generates a reactive force (36) which sets the machine housing (14) in motion.
  • the first lever arm (22) which is essentially rigidly connected to the machine housing (14), transmits this movement to the pivotably suspended second lever arm (24). Due to the arrangement of the rotatable engagement point (34) on the one hand and the movable compensating means (30) on the other hand, viewed from the pivot bearing point (28), the direction of movement on the movable compensating means (30) is reversed relative to the movement of the machine housing (14).
  • FIG. 5 Deviating from the previous embodiment is in FIG. 5 an embodiment shown in which the second connection between the handle (16) and the machine housing (14) via a pivot axis (54) is realized. Further advantageous embodiments result from elastic mounting of the pivot axis.
  • FIG. 6 embodiment shown combines the embodiment FIG. 4 with two return (48) and / or damping elements (50).
  • the reset (48) and / or damping elements (50) act in an analogous manner on the movable compensating means (30), as already in the exemplary embodiment FIG. 3 described. Also analogous developments of the hand tool of the invention (10) as in the description FIG. 3 possible.
  • FIG. 7 is an embodiment according to FIG. 5 shown, which is supplemented by two restoring (48) and / or damping elements (50).
  • the Operation of the return (48) and / or damping elements (50) is as previously described.
  • the movable compensating means (30) is displaceably mounted on a rigid and straight guide rail (56).
  • the second lever arm (24) engages a pivot bearing (58) on the movable compensating means (30). If the second lever arm (24) pivots about the pivot bearing point (34) due to a reactive force (36) acting on the first lever arm (22), the movable compensating means is displaced along the guide rail (56).
  • Further developments of the guidance of the movable compensating means (30) are possible by means of special, for example hyperbolic or parabolic, and / or non-rigid guide rails (56).
  • FIGS. 8a and 8b show two embodiments of another embodiment of a hand tool of the invention (10).
  • the first lever arm (22) and the second lever arm (24) by at least one thrust-pivot gear device (60), in particular, for example, a rack-and-pinion gear or a push rod-friction gear, interacting with each other.
  • the first lever arm (22) on a thrust element (62), in particular, for example, a Zahnungsddle or Reibround on.
  • This thrust element (62) is arranged on the side of the first lever arm (22) facing the movable compensating means (30).
  • the second lever arm (24) is preferably fixed to a pivoting element (64), here in particular as a circular (64a, Fig. 8a ) or cycloids (64b, Fig. 8b ) Gear or friction wheel, connected.
  • the pivoting element (64) is rotatably mounted about a fixed, preferably rigidly connected to the handle (16) pivot axis (66).
  • the drive device (16) generates a reactive force (36) which sets the machine housing (14) in motion.
  • the first lever arm (22) substantially rigidly connected to the machine housing (14) transmits this movement via the push-pivot gear device (60) to the second lever arm (24).
  • the pivot axis (66) opposite arrangement of the thrust-pivot gear device (60) on the one hand and the movable balancing means (30) on the other hand, the movement direction is on movable compensating means (30) relative to the movement of the machine housing (14) vice versa.
  • the damping effect of the movable compensating means (30) is in this arrangement, inter alia, by the distance B of the movable compensating means (30) from the pivot axis (66) and by the distance A between the pivot axis (66) and the effective range (68) of the thrust Swivel transmission device (60) determined. Furthermore, the effect of the movable compensation means (30) can be influenced by the design of a non-circular pivot member (64b).
  • FIGS. 9a and 9b is a further embodiment of a hand tool according to the invention with at least one thrust-pivoting gear device (60) between the first lever arm (22) and the second lever arm (24), wherein the movable compensating means (30) in the machine housing (14) is arranged.
  • the first lever arm (24) and the movable compensating means (30) on one and the same side of the pivot axis (66) are arranged.
  • the second lever arm (24) is fixed, preferably rigidly connected to a pivoting element (64) of the push-pivot gear device (60).
  • the pivoting element (64) has a circular (64a, Fig. 9a ), cycloids (64b, Fig. 9b ) or other shape.
  • an arrangement similar to the embodiment may FIG. 7 with a not rigidly, but movably connected to the movable compensating means (30) second or third lever arm (24, 42) prove to be advantageous.
  • further connection variants of the movable compensating means (30) with the second or third lever arm (24, 42) acting on the movable compensating means (30) such as a toothing or alternative form-fitting connection, are conceivable.
  • a suitable, inventive deflection system (20) build up.
  • FIG. 10 shows a hand tool (10) according to the invention, in which the deflection system (20) is constructed on a cable pulling device (68).
  • the cable pull device (68) comprises at least one, preferably two, three or more deflection rollers (70).
  • the deflection rollers (70) are rotatably mounted in the handle via a respective axis of rotation (72), wherein the axes of rotation (72) are fixed, preferably rigidly connected to the handle.
  • the cable pull device (68) comprises a tension element (74), here designed as a pull cable (74a). This is preferably firmly connected with its first cable end (76) with the machine housing (14).
  • the first end of the rope (76) attached to a mounting lug (78) on the machine housing (14).
  • the movable compensating means (30) is preferably fixedly connected.
  • the cable pull device (68) has a restoring element (82), designed here as a return spring (82a).
  • the restoring element (82) is arranged between an inner end face (84) and the movable compensating element (30) such that upon the occurrence of a tensile force FZ on the traction cable a restoring force FR acts on the movable compensating means.
  • the return element (82) is ideally biased so that when moving the machine housing (14) due to a reactive force (36), the movable compensating means (30) can perform a compensating movement in the opposite direction.
  • Extensions and / or alternative embodiments of the embodiment according to Fig. 10 arise by varying the attachment of the cable ends (76, 80), in particular with fastening hooks, fastening bushings and / or similar fasteners.
  • modifications by varying the number of deflection rollers (70), in particular one, three, four or more deflection rollers (70), and / or the cable guide are possible.
  • a deflection system (20) according to the invention with a cable pulling device (68) analogous to the embodiment Fig. 10 to an arrangement of the movable compensating means (30) are used in the machine housing and / or with other hand concept shapes and / or - fasteners, in particular with the second spring element (19), as a variation of the example Fig. 10 to be obtained.
  • FIG. 11 a further embodiment of a hand tool according to the invention with a deflection system (20) is shown, which is constructed as a pressure-body system (86).
  • the pressure-body system (86) in the handle (16).
  • the pressure-body system (86) has a storage cylinder (90) and a pressure line (92).
  • the pressure-body system comprises a compensating cylinder (94).
  • the storage cylinder (90) encloses a storage volume (96).
  • the balancing cylinder comprises a compensation volume (98).
  • the storage volume (96) and the compensation volume (98) are connected to one another via the pressure line (92), the total volume being filled with a fluid (100), preferably a gas or a liquid, in particular hydraulic oil.
  • the storage volume (96) is limited on one side by an axially displaceable accumulator piston (102).
  • the first lever arm (22) is preferably fixed, in particular in one piece, connected to the accumulator piston (102).
  • the compensating volume (98) is limited on one side by an axially displaceable compensating piston (104). This is fixed, preferably rigidly connected to the movable compensating means (30). In a preferred embodiment, the balance piston (104) is made in one piece with the movable compensation means (30).
  • a reactive force (36) acts on the first lever arm (22) and thus on the accumulator piston (102) via the machine housing (14)
  • the fluid in the accumulator volume (96) is compressed and displaced.
  • the fluid deviates via the pressure line (92) into the compensation volume (98).
  • the compensating piston (104) and thus the movable compensating means are displaced counter to the direction of movement of the machine housing (14).
  • the air in the decreasing ventilation volume (106) can escape via the throttle (108).
  • a reversal of movement of the movable compensating means (30) relative to the machine housing (14) occurs in the event that a negative reactive force (36) acts on the machine housing (14).
  • a suitable fluid (100) in particular a gas - for example air, or a liquid - for example an oil
  • the damping effect of a vibration damping according to the invention can be influenced.
  • the volumes (96, 98, 106) and the pressure line (92) additional influence on the damping properties can be taken.
  • the arrangement of a, in particular variable line throttle in the pressure line (92) the damping can be influenced.
  • the throttle (108) can be made variable so that a control of the damping characteristic by users is possible.

Description

Stand der TechnikState of the art

Die Erfindung betrifft eine Handwerkzeugmaschine nach dem Oberbegriff des unabhängigen Anspruchs.The invention relates to a hand tool according to the preamble of the independent claim.

Die Handwerkzeugmaschine weist eine, in einem Maschinengehäuse angeordnete Antriebsvorrichtung zum Antrieb eines Werkzeugs auf. Dabei erzeugen die Antriebsvorrichtung und/oder das Werkzeug Schwingungen, die als Vibrationen auf einen Maschinenbediener übertragen werden. Die Handwerkzeugmaschine weist ferner einen, über ein bewegliches Ausgleichsmittel schwingungsgedämpften Handgriff auf. Das bewegliche Ausgleichsmittel ist im Maschinengehäuse und/oder im Handgriff angeordnet, wobei das bewegliche Ausgleichsmittel als beweglich gelagertes Gegengewicht ausgeführt ist. Die Massenträgheit des Gegengewichtes wirkt dabei dämpfend auf die Amplitude der Schwingungen. Ein derartige Handwerkzeugmaschine ist beispielsweise aus der SU 893 515 A1 bekannt.The hand tool has a, arranged in a machine housing drive device for driving a tool. In this case, the drive device and / or the tool generate vibrations which are transmitted as vibrations to a machine operator. The hand tool also has a, via a movable compensating means vibration damped handle. The movable compensating means is arranged in the machine housing and / or in the handle, wherein the movable compensating means is designed as a movably mounted counterweight. The inertia of the counterweight has a damping effect on the amplitude of the vibrations. Such a power tool is for example from the SU 893 515 A1 known.

Darüber hinaus sind weitere Verfahren und Vorrichtungen zur Schwingungsdämpfung des Handgriffs bekannt. So werden zum einen gefederte und/oder elastisch gedämpfte Handgriffe eingesetzt. Bei Anordnungen wird der Handgriff über das Feder-/Dämpfersystem vom schwingungsangeregten Maschinengohäuse entkoppelt. Zum anderen kommen geteilte, gefederte und/oder gedämpfte Gehäuse zum Einsatz, um das Gehäuse von den schwingungsangeregten Komponenten wie zum Beispiel der Antriebsvorrichtung zu entkoppeln. Derartige Handgriffe sind beispielsweise aus der GB 2 171 045 A oder der DE 10 2004 041 29 A1 bekannt.In addition, other methods and apparatus for vibration damping of the handle are known. Thus, on the one hand spring-loaded and / or elastically damped handles are used. In arrangements, the handle is decoupled via the spring / damper system from the vibratory machine housing. On the other hand, split, spring-loaded and / or damped housings are used to decouple the housing from the vibratory-excited components, such as the drive device. Such handles are for example from the GB 2 171 045 A or the DE 10 2004 041 29 A1 known.

Offenbarung der ErfindungDisclosure of the invention Vorteile der ErfindungAdvantages of the invention

Die erfindungsgemäße Handwerkzeugmaschine weist mindestens ein bewegliches Ausgleichsmittel auf, das über ein Umlenksystem mit dem Handgriff und/oder dem Maschinengehäuse derart wirkverbunden ist, dass mindestens ein Freiheitsgrad des beweglichen Ausgleichsmittels im Wesentlichen in einer Schwingungshauptachse des Maschinengehäuses verläuft. Durch das Umlenksystem wird eine Wirkung des beweglichen Ausgleiehsmittels auf den Handgriff realisiert. Der durch das Umlenksystem herbeigeführte Wirkzusammenhang zwischen Handgriff und beweglichem Ausgleichsmittel hat den Vorteil, dass das bewegliche Ausgleichsmittel sehr kompakt konstruiert und mit geringer Masse versehen werden kann. Dadurch lässt sich eine vorteilhafte, besonders kompakte Bauform der erfindungsgemäßen Handwerkzeugmaschine erreichen. So wird mit vergleichsweise geringem Aufwand eine erhebliche Dämpfung der auf den Maschinenbediener übertragenen Vibrationen erreicht. Als weiterer Vorteil ist anzusehen, dass das bewegliche Ausgleichsmittel nicht nennenswert zum Gesamtgewicht der Handwerkzeugmaschine beiträgt, d.h. die Handhabbarkeit einer, nach der Erfindung schwingungsgedämpften Handwerkzeugmaschine wird spürbar verbessert.The portable power tool according to the invention has at least one movable compensating means, which is operatively connected to the handle and / or the machine housing via a deflection system in such a way that at least one degree of freedom of the movable compensating means extends substantially in a main axis of oscillation of the machine housing. By the deflection system, an effect of the movable Ausgleiehsmittels is realized on the handle. The effect brought about by the deflection system interaction between handle and movable compensating means has the advantage that the movable compensating means can be constructed very compact and provided with low mass. As a result, an advantageous, particularly compact design of the hand tool of the invention can be achieved. Thus, a considerable damping of transmitted to the machine operator vibrations is achieved with relatively little effort. A further advantage is that the movable compensating means does not contribute significantly to the total weight of the hand tool, i. the handling of a, according to the invention vibration-damped hand tool is noticeably improved.

Durch die in den Unteransprüchen aufgeführten Maßnahmen ergeben sich vorteilhafte Weiterbildungen und Verbesserungen der im Hauptanspruch angegebenen Merkmale.The measures listed in the dependent claims, advantageous refinements and improvements of the main claim features.

In einer bevorzugten Ausführungsform weist das Umlenksystem mindestens einen, vorzugsweise zwei drehbar miteinander verbundene, Hebelarme auf. Eine durch die Antriebsvorrichtung und/oder das Werkzeug verursachte Reaktivkraft wirkt dabei auf einen ersten Hebelarm, Durch diese Krafteinleitung lässt sich eine sehr wirksame und zugleich kostengünstige Umsetzung der erfindungsgemäßen Handwerkzeugmaschine erreichen.In a preferred embodiment, the deflection system has at least one, preferably two rotatably connected, lever arms. A reactive force caused by the drive device and / or the tool acts on a first lever arm. By this force introduction, a very effective and at the same time cost-effective implementation of the hand tool of the invention can be achieved.

Eine besonders kostengünstige und kompakte Ausführung der erfindungsgemäßen Handwerkzeugmaschine lässt sich durch das Einwirken eines zweiten Hebelarms auf das bewegliche Ausgleichsmittel erreichen.A particularly cost-effective and compact design of the portable power tool according to the invention can be achieved by the action of a second lever arm on the movable compensating means.

In einer bevorzugten Ausführung der erfindungsgemäßen Handwerkzeugmaschine wird das Umlenksystem aus zwei Hebelarmen aufgebaut. Dabei ist ein Hebelarm vorzugsweise starr mit dem Handgriff verbunden. Durch eine Eingriffsöffnung im Maschinengehäuse greift dieser erste Hebelarm an einem drehbaren Angriffspunkt am zweiten Hebelarm an. Der zweite Hebelarm ist dabei mit einem mit dem Maschinengehäuse verbundenen Drehlagerpunkt gelagert. Der drehbare Angriffspunkt ist in einem Abstand A zu diesem Drehlagerpunkt angeordnet. Der Abstand A wirkt dabei vorteilhafterweise als ein zusätzlicher Abstimmungsparameter für das Dämpfungssystem.In a preferred embodiment of the portable power tool according to the invention, the deflection system is constructed from two lever arms. In this case, a lever arm is preferably rigidly connected to the handle. Through an intervention opening in Machine housing attacks this first lever arm at a rotatable point on the second lever arm. The second lever arm is mounted with a rotary bearing point connected to the machine housing. The rotatable engagement point is arranged at a distance A to this pivot point. The distance A acts advantageously as an additional tuning parameter for the damping system.

Bei einer alternativen Ausführungsform ist ein erster Hebelarm vorzugsweise starr mit dem Maschinengehäuse verbunden. Durch eine Durchführungsöffnung im Handgriff greift der erste Hebelarm an einem drehbaren Angriffspunkt am zweiten Hebelarm an. Der zweite Hebelarm ist in einem mit dem Handgriff verbundenen Drehlagerpunkt drehbar gelagert. Der drehbare Angriffspunkt befindet sich in einem Abstand A zum Drehlagerpunkt Der in der Dimensionierung frei wählbare Abstand A erlaubt vorteilhafterweise eine zusätzliche Abstimmung des Dämpfungssystems. Als weiteren Vorteil ist anzusehen, dass zur Herstellung einer erfindungsgemäßen Handwerkzeugmaschine keine Eingriffe innerhalb des Maschinengehäuses notwendig sind.In an alternative embodiment, a first lever arm is preferably rigidly connected to the machine housing. Through a passage opening in the handle of the first lever arm engages a rotatable point on the second lever arm. The second lever arm is rotatably mounted in a pivot bearing point connected to the handle. The rotatable engagement point is located at a distance A to the pivot bearing point The freely selectable in the dimensioning distance A advantageously allows additional tuning of the damping system. A further advantage is to be considered that no interventions within the machine housing are necessary for the production of a hand tool according to the invention.

Eine besonders kostengünstige Ausführung einer erfindungsgemäßen Handwerkzeugmaschine lässt sich durch die feste Verbindung zwischen dem zweiten Hebelarm und dem beweglichen Ausgleichsmittel realisieren. Vorzugsweise werden dabei der zweite Hebelarm und das bewegliche Ausgleichsmittel einteilig ausgeführt.A particularly cost-effective embodiment of a hand tool according to the invention can be realized by the fixed connection between the second lever arm and the movable compensating means. Preferably, the second lever arm and the movable compensation means are made in one piece.

Durch ein Umlenksystem mit einem dritten Hebelarm lässt sich eine besonders wirksame Schwingungsdämpfung der erfindungsgemäßen Handwerkzeugmaschine erreichen. Dazu ist der dritte Hebelarm in einem Abstand B vom drehbaren Angriffspunkt drehbar mit dem zweiten Hebelarm verbunden. Der dritte Hebelarm wirkt nun auf das bewegliche Ausgleichsmittel.By a deflection system with a third lever arm, a particularly effective vibration damping of the hand tool of the invention can be achieved. For this purpose, the third lever arm at a distance B from the rotatable engagement point is rotatably connected to the second lever arm. The third lever arm now acts on the movable compensating means.

Eine kompakte Ausführung eines erfindungsgemäßen Umlenksystem mit drei Hebelarmen lässt sich dadurch erreichen, dass der dritte Hebelarm mit dem beweglichen Ausgleichsmittel fest verbunden ist. In einer darüber hinaus besonders kostengünstigen Ausführung ist der dritte Hebelarm einteilig mit dem beweglichen Ausgleichsmittel ausgeführt.A compact embodiment of a deflection system according to the invention with three lever arms can be achieved in that the third lever arm is fixedly connected to the movable compensating means. In a particularly cost-effective embodiment, the third lever arm is made in one piece with the movable compensating means.

Durch den Einsatz mindestens einer Schub-Schwenk-Getriebevorrichtung im Umlenksystem wird eine besonders starke Wirkung des beweglichen Ausgleichsmittels erzielt.By using at least one thrust-pivoting gear device in the deflection system, a particularly strong effect of the movable compensating means is achieved.

Eine besonders kompakte und gleichzeitig den gegebenen Bauräumen anpassbare Ausführung wird durch die Verwendung mindestens einer Seilzugvorrichtung im Umlenksystem erreicht.A particularly compact design, which at the same time can be adapted to the given installation space, is achieved by the use of at least one cable pull device in the deflection system.

Ein Umlenksystem mit mindestens einem Druckkörpersystem ist bezüglich Bauraum flexibel einsetzbar und weist zu gleich eine besonders gute Abstimmbarkeit der Dämpfungseigenschaften auf.A deflection system with at least one pressure-element system can be used flexibly with regard to installation space and at the same time has a particularly good tunability of the damping properties.

Eine vorteilhafte Weiterentwicklung der erfindungsgemäßen Handwerkzeugmaschine lässt sich durch eine Anordnung mindestens eines, vorzugsweise zweier Rückstellelemente am beweglichen Ausgleichsmittel erreichen. Bei einer Auslenkung des beweglichen Ausgleichsmittels aus einer Ruheposition heraus übt das Rückstellelement eine Rückstellkraft FR auf das bewegliche Ausgleichsmittel aus. Dadurch werden vorteilhafterweise Freiheitsgrade für die Auslegung des Dämpfungssystems gewonnen.An advantageous development of the hand tool of the invention can be achieved by an arrangement of at least one, preferably two return elements on the movable compensating means. Upon a deflection of the movable compensating means from a rest position, the restoring element exerts a restoring force FR on the movable compensating means. As a result, degrees of freedom for the design of the damping system are advantageously obtained.

Eine weitere vorteilhafte Weiterentwicklung der erfindungsgemäßen Handwerkzeugmaschine lässt sich durch die Anordnung mindestens eines, vorzugsweise zweier Dämpfungselemente am beweglichen Ausgleichsmittel realisieren. Bei einer Auslenkung des beweglichen Ausgleichmittels aus einer Ruheposition heraus wirkt das Dämpfungselement dämpfend auf die Bewegung des beweglichen Ausgleichsmittels. Vorteilhafterweise ergeben sich so Freiheitsgrade in der Auslegung des Dämpfungssystems. Insbesondere kann das Dämpfungssystems der erfindungsgemäßen Handwerkzeugmaschine ideal an das Belastungsprofil angepasst wird.A further advantageous further development of the portable power tool according to the invention can be realized by the arrangement of at least one, preferably two damping elements on the movable compensating means. In a deflection of the movable compensating means from a rest position, the damping element acts to dampen the movement of the movable compensating means. Advantageously, this results in degrees of freedom in the design of the damping system. In particular, the damping system of the hand tool according to the invention can be ideally adapted to the load profile.

Beschreibung der ZeichnungenDescription of the drawings

Einige Ausführungsbeispiele der Erfindung sind in den Zeichnungen dargestellt und in der folgenden Beschreibung näher erläutert. Es zeigen:

  • Figur 1 eine schematische Seitenansicht einer erfindungsgemäßen Handwerkzeugmaschine mit einem zweiarmigen Umlenksystem,
  • Figur 2 eine schematische Seitenansicht einer erfindungsgemäßen Handwerkzeugmaschine mit einem dreiarmigen Umlenksystem,
  • Figur 3 eine erfindungsgemäße Handwerkzeugmaschine wie in Figur 2 mit zusätzlich mindestens einem Rückstell- und/oder Dämpfungselement,
  • Figur 4 eine schematische Seitenansicht einer erfindungsgemäßen Handwerkzeugmaschine mit einem zweiarmigen Umlenksystem, wobei das bewegliche Ausgleichsmittel im Handgriff angeordnet ist,
  • Figur 5 eine alternative Ausführungsform zu Figur 4,
  • Figur 6 eine erweiterte Ausführungsform zu Figur 4 mit mindestens einem Rückstell- und/oder Dämpfungselement,
  • Figur 7 eine erweiterte Ausführungsform von Figur 5 mit einem Rückstell- und/oder Dämpfungselement.
  • Figur 8a eine alternative Ausführungsform zu Figur 4 unter Verwendung einer Schub-Schwenk-Getriebevorrichtung mit kreisförmigem Schwenkelement
  • Figur 8b eine alternative Ausführungsform zu Figur 8b mit einem zykloiden Schwenkelement
  • Figuren 9a und 9b alternative Ausführungsformen zu Figur 1 unter Verwendung einer Schub-Schwenk-Getriebevorrichtung mit kreisförmigem bzw. zykloidem Schwenkelement
  • Figur 10 eine weitere Ausführungsform analog Figur 4 mit einer Seilzugvorrichtung als Umlenksystem
  • Figur 11 eine weitere Ausführungsform analog Figur 4 mit einem Druckkörpersystem als Umlenksystem
Some embodiments of the invention are illustrated in the drawings and explained in more detail in the following description. Show it:
  • FIG. 1 a schematic side view of a hand tool of the invention with a two-armed deflection system,
  • FIG. 2 a schematic side view of a hand tool of the invention with a three-arm deflection system,
  • FIG. 3 a hand tool according to the invention as in FIG. 2 additionally with at least one restoring and / or damping element,
  • FIG. 4 FIG. 2 a schematic side view of a hand-held power tool according to the invention with a two-armed deflection system, wherein the movable compensation means is arranged in the handle, FIG.
  • FIG. 5 an alternative embodiment to FIG. 4 .
  • FIG. 6 an extended embodiment FIG. 4 with at least one restoring and / or damping element,
  • FIG. 7 an extended embodiment of FIG. 5 with a restoring and / or damping element.
  • FIG. 8a an alternative embodiment to FIG. 4 using a push-pivot transmission device with a circular pivot element
  • FIG. 8b an alternative embodiment to FIG. 8b with a cycloidal pivoting element
  • FIGS. 9a and 9b alternative embodiments to FIG. 1 using a push-pivot transmission device with a circular or cycloidal pivoting element
  • FIG. 10 a further embodiment analog FIG. 4 with a cable device as Umlenksystem
  • FIG. 11 a further embodiment analog FIG. 4 with a pressure system as deflection system

Beschreibung der AusführungsbeispieleDescription of the embodiments

Bei der in den Beispielen gezeigten Handwerkzeugmaschine (10) handelt es sich um ein elektrisch betriebenes Handwerkzeug. Dieses weist mindestens eine Antriebsvorrichtung (12) aus mindestens einem elektrischen Motor (12a) mit mindestens einer Motorwelle (12b) und mindestens einer an der Motorwelle (12b) gekoppelten Getriebevorrichtung (12c) auf. Dabei dient die Getriebevorrichtung (12c) mindestens der Umsetzung einer Rotationsbewegung der Motorwelle (12b) in eine Transversalbewegung entlang einer durch das Werkzeug definierten Maschinenachse (12d). Die Handwerkzeugmaschine (10) kann als Meißel- und/oder Bohrhammer ausgeführt sein, bei der die Antriebsvorrichtung (12) zur Betätigung eines Hammerschlagwerks (13) dient. Weitere Beispiele von Handwerkzeugmaschinen (10) mit mindestens einem zwischen zwei Endlagen alternierenden Antrieb eines Werkzeugs sind Schlagschrauber, Schlagbohrmaschinen, Stich-, Fuchsschwanz- oder Säbelsägen.The hand tool (10) shown in the examples is an electrically operated hand tool. This has at least one drive device (12) comprising at least one electric motor (12a) with at least one motor shaft (12b) and at least one gear device (12c) coupled to the motor shaft (12b). In this case, the transmission device (12c) at least the implementation of a rotational movement of the motor shaft (12b) in a transverse movement along a machine axis defined by the axis (12d). The hand tool (10) can be designed as a chisel and / or hammer drill, wherein the drive device (12) for Actuation of a hammer impact mechanism (13) is used. Further examples of hand-held power tools (10) with at least one alternating drive between two end positions of a tool are impact wrenches, percussion drills, stab, foxtail or reciprocating saws.

Die in Figur 1 dargestellte, erfindungsgemäße Handwerkzeugmaschine (10) weist ein Maschinengehäuse (14) und einen mit dem Maschinengehäuse (14) verbundenen Handgriff (16) auf. Im Maschinengehäuse (14) ist die Antriebsvorrichtung (12) angeordnet. Die Antriebsvorrichtung (12) ist hier als Hammerschlagwerk (13) schematisch angedeutet. Der Handgriff (16) ist über ein Federelement (18) mit dem Maschinengehäuse (14) verbunden. In weiteren Ausführungen kann der Handgriff (16) ergänzend oder alternativ über mindestens zwei Federelemente und/oder mindestens ein, zwei oder mehreren Dämpfungselementen mit dem Maschinengehäuse (14) verbunden werden.In the FIG. 1 illustrated, hand tool (10) according to the invention comprises a machine housing (14) and a with the machine housing (14) connected to the handle (16). In the machine housing (14), the drive device (12) is arranged. The drive device (12) is indicated schematically here as a hammer impact mechanism (13). The handle (16) is connected via a spring element (18) with the machine housing (14). In further embodiments, the handle (16) additionally or alternatively via at least two spring elements and / or at least one, two or more damping elements with the machine housing (14) are connected.

Darüber hinaus weist die erfindungsgemäße Handwerkzeugmaschine (10) ein Umlenksystem (20) auf. Das Umlenksystem (20) umfasst einen ersten Hebelarm (22) und einen zweiten Hebelarm (24).In addition, the hand tool (10) according to the invention has a deflection system (20). The deflection system (20) comprises a first lever arm (22) and a second lever arm (24).

Der erste Hebelarm (22) ist mit dem Handgriff (16) starr verbunden. Durch eine Eingriffsöffnung (26) ragt der erste Hebelarm (22) in das Maschinengehäuse (14) hinein. In weiteren Ausführungen kann der erste Hebelarm auch elastisch, drehbeweglich und/oder verschiebbar mit Handgriff (16) verbunden sein.The first lever arm (22) is rigidly connected to the handle (16). Through an engagement opening (26) of the first lever arm (22) projects into the machine housing (14). In further embodiments, the first lever arm can also be connected elastically, rotatably and / or displaceably with the handle (16).

Der zweite Hebelarm (24) des Umlenksystems (20) ist im Maschinengehäuse (14) angeordnet. In einem, am Maschinengehäuse (14) abgestützten Drehlagerpunkt (28) ist der zweite Hebelarm (24) drehbar gelagert. Das bewegliche Ausgleichmittel (30) ist als Gegengewicht (31) ausgeführt. Das Gegengewicht (31) ist am vom Drehlagerpunkt (28) entfernten Armende (32) des zweiten Hebelarms (24) angeordnet. Das Gegengewicht (31) ist fest mit dem zweiten Hebelarm (24) verbunden.The second lever arm (24) of the deflection system (20) is arranged in the machine housing (14). In one, on the machine housing (14) supported pivot bearing point (28) of the second lever arm (24) is rotatably mounted. The movable compensating means (30) is designed as a counterweight (31). The counterweight (31) is arranged at the arm end (32) of the second lever arm (24) remote from the pivot point (28). The counterweight (31) is fixedly connected to the second lever arm (24).

Das durch die Eingriffsöffnung (26) hindurch greifende Ende des ersten Hebelarms (22) greift an einem drehbaren Angriffspunkt (34) am zweiten Hebelarm (24) an. Dabei ist der drehbare Angriffspunkt (34) in einem erstem Abstand A von dem Drehlagerpunkt (28) entfernt.The end of the first lever arm (22) reaching through the engagement opening (26) engages at a rotatable engagement point (34) on the second Lever arm (24) on. In this case, the rotatable engagement point (34) at a first distance A from the pivot bearing point (28) is removed.

Im Folgenden wird die Funktion der erfindungsgemäßen Handwerkzeugmaschine (10) erläutert. Durch die Wirkung der Antriebsvorrichtung (16) wirkt eine als Rückstoßkraft (35) bezeichnete Reaktivkraft (36) auf das Maschinengehäuse (14). Die dadurch erzeugten Schwingungen breiten sich vorzugsweise entlang einer Schwingungshauptachse (38) im Maschinengehäuse (14) aus.In the following, the function of the hand tool (10) according to the invention will be explained. By the action of the drive device (16) acts as a repulsive force (35) designated reactive force (36) on the machine housing (14). The vibrations generated thereby preferably propagate along a major axis of vibration (38) in the machine housing (14).

Durch das Federelement (18) ist der Handgriff (16) am Maschinengehäuse (14) abgestützt. Der mit dem Maschinengehäuse (14) starr verbundene Drehlagerpunkt (28) des zweiten Hebelarms (24) folgt einer Bewegung des Maschinengehäuses (14) direkt. Aufgrund seiner Massenträgheit bewegt sich das bewegliche Ausgleichsmittel (30) am vom Drehlagerpunkt (28) entfernten Armende (32) des zweiten Hebelarms (24) dieser Bewegung nur verzögert. Über den, in einem zweiten Abstand B vom beweglichen Ausgleichsmittel (30) angeordneten, drehbaren Angriffspunkt (34) wird die verzögerte Bewegung auf den ersten Hebelarm (22) übertragen. Da der erste Hebelarm (22) starr mit dem Handgriff (16) verbunden ist, entsteht zwischen dem Handgriff (16) und dem Maschinengehäuse (14) eine Relativbewegung (40). Durch diese Relativbewegung (40) werden Vibrationen oder Schwingungen mit verminderter Amplitude an den Handgriff weitergereicht.By the spring element (18) of the handle (16) on the machine housing (14) is supported. The pivot bearing point (28) of the second lever arm (24) rigidly connected to the machine housing (14) follows a movement of the machine housing (14) directly. Due to its inertia, the movable compensating means (30) moves only delayed at the arm end (32) of the second lever arm (24) remote from the pivot point (28) of this movement. About the, at a second distance B from the movable compensating means (30) arranged, rotatable engagement point (34), the delayed movement is transmitted to the first lever arm (22). Since the first lever arm (22) is rigidly connected to the handle (16), a relative movement (40) is created between the handle (16) and the machine housing (14). By this relative movement (40) vibrations or vibrations with reduced amplitude are passed to the handle.

Durch die Dimensionierung des beweglichen Ausgleichsmittels (30), also des Gegengewichts (31), ist eine Abstimmung des Dämpfungsverhaltens gegenüber der Handwerkzeugmaschine (10) möglich.By dimensioning the movable compensating means (30), that is, the counterweight (31), a vote of the damping behavior with respect to the power tool (10) is possible.

Über die Aufteilung der Abstände A und B kann während der Auslegung der Handwerkzeugmaschine (10) die Wirkung des beweglichen Ausgleichsmittels (30) beeinflusst werden. Die Abstände A und B wirken somit als Auslegungsparameter.About the division of the distances A and B, the effect of the movable compensating means (30) can be influenced during the design of the power tool (10). The distances A and B thus act as design parameters.

Figur 2 zeigt eine Weiterbildung der erfindungsgemäßen Handwerkzeugmaschine (10) als zweite Ausführungsform. Gleiche Elemente sind dabei gleich bezeichnet und mit denselben Bezugsnummern versehen. Dabei ist in einem Abstand B vom drehbaren Angriffspunkt (34) ein dritter Hebelarm (42) drehbar mit dem vom Drehlagerpunkt (28) entfernten Armende (32) des zweiten Hebelarms (24) verbunden. Der dritte Hebelarm (42) wird hier zwei Führungselemente (44) parallel zur Schwingungshauptachse (38) geführt. Durch Variation der Anzahl der Führungselemente (44), insbesondere ein, drei oder mehrere Führungselemente (44), können Varianten der erfindungsgemäßen Handwerkzeugmaschine (10) erhalten werden. Eine Weiterentwicklung der erfindungsgemäßen Handwerkzeugmaschine (10) ergibt sich durch Verwendung von Lagerelementen wie z.B. Gleit-, Nadel-, Rollen- oder Wälzlager zur Verbesserung der Reibungseigenschaften der Führungselemente (44). FIG. 2 shows a development of the hand tool of the invention (10) as a second embodiment. Same elements are the same name and provided with the same reference numbers. In this case, at a distance B from the rotatable engagement point (34), a third lever arm (42) rotatably connected to the arm of the pivot point (28) remote end (32) of the second lever arm (24). The third lever arm (42) is guided here two guide elements (44) parallel to the main axis of vibration (38). By varying the number of guide elements (44), in particular one, three or more guide elements (44), variants of the hand tool (10) according to the invention can be obtained. A development of the hand tool (10) according to the invention results from the use of bearing elements such as sliding, needle, roller or roller bearings to improve the friction properties of the guide elements (44).

Der dritte Hebelarm (42) wirkt dabei auf das bewegliche Ausgleichsmittel (30), hier als Gegengewicht (31) ausgeführt. Nach einer bevorzugten Ausführungsform ist das Gegengewicht (31) fest mit dem dritten Hebelarm (42) verbunden. Insbesondere können in einer Weiterentwicklung der erfindungsgemäßen Handwerkzeugmaschine (10) das Gegengewicht (31) und der dritte Hebelarm (42) einstückig ausgeführt sein.The third lever arm (42) acts on the movable compensating means (30), designed here as a counterweight (31). According to a preferred embodiment, the counterweight (31) is fixedly connected to the third lever arm (42). In particular, in a further development of the portable power tool (10) according to the invention, the counterweight (31) and the third lever arm (42) can be made in one piece.

Durch die Führung des dritten Hebelarms (42) in den Führungselementen (44) wird sichergestellt, dass das bewegliche Ausgleichsmittel (30) nur in Richtung der Schwingungshauptachse (38) beweglich ist. Dadurch wirkt es besonders effizient dämpfend auf Schwingungen entlang der Schwingungshauptachse (38).The guidance of the third lever arm (42) in the guide elements (44) ensures that the movable compensating means (30) is movable only in the direction of the main axis of vibration (38). As a result, it has a particularly efficient damping effect on vibrations along the main axis of oscillation (38).

Eine bevorzugte Weiterentwicklung der erfindungsgemäßen Handwerkzeugmaschine (10) ist in Figur 3 gezeigt. Gleiche Elemente sind dabei gleich bezeichnet und mit denselben Bezugsnummern versehen. In Richtung des Freiheitsgrads (46) des beweglichen Ausgleichsmittels (30) sind mindestens zwei Rückstell- (48) und/oder Dämpfungselemente (50) angeordnet. Die Rückstell-(48) und/oder Dämpfungselemente (50) wirken so in Richtung des Freiheitsgrads (46) auf das bewegliche Ausgleichsmittel (30). Die Rückstellelemente (48) sind in Figur 3 in einer besonders bevorzugten Form als Federelemente (49) ausgeführt.A preferred further development of the hand tool (10) according to the invention is in FIG. 3 shown. The same elements are denoted the same and provided with the same reference numbers. At least two return (48) and / or damping elements (50) are arranged in the direction of the degree of freedom (46) of the movable compensating means (30). The restoring (48) and / or damping elements (50) thus act in the direction of the degree of freedom (46) on the movable compensating means (30). The return elements (48) are in FIG. 3 implemented in a particularly preferred form as spring elements (49).

Bei einer Auslenkung des beweglichen Ausgleichsmittels (30) aus einer Ruheposition erzeugen die Rückstellelemente (48) eine rückstellende Kraft FR auf das bewegliche Ausgleichselement (30). Diese versucht, das bewegliche Ausgleichsmittel (30) in die Ruheposition zurückzuversetzen.Upon a deflection of the movable compensating means (30) from a rest position, the restoring elements (48) generate a restoring force FR on the movable compensating element (30). This tries to put the movable compensating means (30) in the rest position.

Dämpfungselemente (50) hingegen wirken dämpfend auf die Bewegungen des beweglichen Ausgleichsmittels (30).Damping elements (50), however, have a damping effect on the movements of the movable compensating means (30).

Varianten dieses Ausführungsbeispiels einer erfindungsgemäßen Handwerkzeugmaschine (10) ergeben sich insbesondere durch Variation der Anzahl von Rückstell- (48) und/oder Dämpfungselementen (50), insbesondere auf ein, drei, vier oder mehr Rückstell- (48) und/oder Dämpfungselemente (50). Eine besonders bevorzugte Variante ergibt sich aus der Kombination von mindestens einem Rückstell- (48) und mindestens einem Dämpfungselemente. Weitere Ausführungsformen ergeben sich durch Variation der Verbindungsmittel der Rückstell- (48) und/oder Dämpfungselemente (50) zum beweglichen Ausgleichsmittel bzw. dem Maschinengehäuse. Insbesondere können die Rückstell- (48) und/oder Dämpfungselemente (50) fest mit dem beweglichen Ausgleichsmittel bzw. dem Maschinengehäuse verbunden sein oder nur an diesen anliegen.Variants of this exemplary embodiment of a handheld power tool (10) according to the invention result in particular by varying the number of reset (48) and / or damping elements (50), in particular to one, three, four or more reset (48) and / or damping elements (50 ). A particularly preferred variant results from the combination of at least one restoring (48) and at least one damping elements. Further embodiments result from varying the connection means of the restoring (48) and / or damping elements (50) to the movable compensating means or the machine housing. In particular, the restoring (48) and / or damping elements (50) can be firmly connected to the movable compensating means or the machine housing or rest only against them.

In Figur 4 ist ein weiteres Ausführungsbeispiel einer erfindungsgemäßen Handwerkzeugmaschine (10) gezeigt, bei der das bewegliche Ausgleichsmittel (30) im Handgriff (16) angeordnet ist. Gleiche Elemente sind dabei gleich bezeichnet und mit denselben Bezugsnummern versehen. Der Handgriff (16) ist über ein erstes (18) und ein zweites Federelement (19) am Maschinengehäuse abgestützt.In FIG. 4 a further embodiment of a hand tool (10) according to the invention is shown, in which the movable compensating means (30) in the handle (16) is arranged. The same elements are denoted the same and provided with the same reference numbers. The handle (16) is supported on the machine housing via a first (18) and a second spring element (19).

Abweichend zu den vorangegangenen Ausführungsbeispielen ist der erste Hebelarm (22) starr mit dem Maschinengehäuse (14) verbunden. Der Handgriff (16) weist eine Durchführungsöffnung (52) auf, durch die der erste Hebelarm (22) in den Handgriff (16) hineingeführt wird.
Der zweite Hebelarm (24) ist in einem mit dem Handgriff (16) starr verbundenen Drehlagerpunkt (28) schwenkbar gelagert. Der erste Hebelarm (22) greift an dem zweiten Hebelarm (24) in einem drehbaren Angriffspunkt (34) an. Der drehbare Angriffspunkt (34) ist in einem Abstand A zum Drehlagerpunkt (28) am zweiten Hebelarm (24) angeordnet.Notwithstanding the preceding embodiments, the first lever arm (22) is rigidly connected to the machine housing (14). The handle (16) has a passage opening (52) through which the first lever arm (22) is guided into the handle (16).
The second lever arm (24) is pivotally mounted in a pivot bearing point (28) rigidly connected to the handle (16). The first lever arm (22) engages the second lever arm (24) in a rotatable engagement point (34). The rotatable engagement point (34) is arranged at a distance A to the pivot bearing point (28) on the second lever arm (24).

Varianten ergeben sich insbesondere durch Wahl der Verbindung von erstem Hebelarm (22) mit dem Maschinengehäuse und/oder dem zweiten Hebelarm (24) mit dem Handgriff. Insbesondere können die Verbindung elastisch, drehelastisch und/oder verschiebbar ausgeführt sein.Variants arise in particular by selecting the connection of the first lever arm (22) with the machine housing and / or the second lever arm (24) with the handle. In particular, the connection can be made elastic, torsionally elastic and / or displaceable.

Das bewegliche Ausgleichsmittel (30) ist an einem von dem drehbaren Angriffspunkt (34) entfernten Armende (32) des zweiten Hebelarms (24) angeordnet.The movable compensating means (30) is disposed at an arm end (32) of the second lever arm (24) remote from the rotatable engagement point (34).

Analog zu den im Vorhergehenden beschriebenen Ausführungsbeispielen erzeugt die Antriebsvorrichtung (16) eine Reaktivkraft (36), welche das Maschinengehäuse (14) in Bewegung versetzt. Der mit dem Maschinengehäuse (14) im Wesentlichen starr verbundene erste Hebelarm (22) überträgt diese Bewegung auf den schwenkbar aufgehängten zweiten Hebelarm (24). Durch die vom Drehlagerpunkt (28) aus gesehen gegenüberliegende Anordnung des drehbaren Angriffspunkts (34) einerseits und des beweglichen Ausgleichsmittels (30) andererseits wird die Bewegungsrichtung am beweglichen Ausgleichsmittel (30) relativ zur Bewegung des Maschinengehäuses (14) umgekehrt.Analogous to the embodiments described above, the drive device (16) generates a reactive force (36) which sets the machine housing (14) in motion. The first lever arm (22), which is essentially rigidly connected to the machine housing (14), transmits this movement to the pivotably suspended second lever arm (24). Due to the arrangement of the rotatable engagement point (34) on the one hand and the movable compensating means (30) on the other hand, viewed from the pivot bearing point (28), the direction of movement on the movable compensating means (30) is reversed relative to the movement of the machine housing (14).

Abweichend vom vorhergehenden Ausführungsbeispiel wird in Figur 5 eine Ausführungsform gezeigt, bei der die zweite Verbindung zwischen dem Handgriff (16) und dem Maschinengehäuse (14) über eine Schwenkachse (54) realisiert wird. Weitere vorteilhafte Ausführungsformen ergeben sich durch elastische Lagerung der Schwenkachse.Deviating from the previous embodiment is in FIG. 5 an embodiment shown in which the second connection between the handle (16) and the machine housing (14) via a pivot axis (54) is realized. Further advantageous embodiments result from elastic mounting of the pivot axis.

Das in Figur 6 gezeigte Ausführungsbeispiel kombiniert das Ausführungsbeispiel aus Figur 4 mit zwei Rückstell- (48) und/oder Dämpfungselementen (50). Die Rückstell- (48) und/oder Dämpfungselemente (50) wirken in analoger Weise auf das bewegliche Ausgleichsmittel (30), wie bereits im Ausführungsbeispiel nach Figur 3 beschrieben. Auch sind analoge Weiterbildungen der erfindungsgemäßen Handwerkzeugmaschine (10) wie in der Beschreibung zu Figur 3 möglich.This in FIG. 6 embodiment shown combines the embodiment FIG. 4 with two return (48) and / or damping elements (50). The reset (48) and / or damping elements (50) act in an analogous manner on the movable compensating means (30), as already in the exemplary embodiment FIG. 3 described. Also analogous developments of the hand tool of the invention (10) as in the description FIG. 3 possible.

In Figur 7 ist eine Ausführungsform gemäß Figur 5 gezeigt, welche um zwei Rückstell- (48) und/oder Dämpfungselemente (50) ergänzt ist. Die Wirkungsweise der Rückstell- (48) und/oder Dämpfungselemente (50) ist wie zuvor beschrieben. Darüber hinaus ist das bewegliche Ausgleichsmittel (30) auf einer starren und geraden Führungsschiene (56) verschiebbar gelagert. Der zweite Hebelarm (24) greift an einem Drehlager (58) am beweglichen Ausgleichsmittel (30) an. Schwenkt der zweite Hebelarm (24) auf Grund einer auf den ersten Hebelarm (22) wirkenden Reaktivkraft (36) um den Drehlagerpunkt (34), so wird das bewegliche Ausgleichsmittel entlang der Führungsschiene (56) verschoben. Weiterbildungen der Führung des beweglichen Ausgleichsmittels (30) sind durch speziell, zum Beispiel hyperbolisch oder parabolisch geformte und/oder nicht starre Führungsschienen (56) möglich.In FIG. 7 is an embodiment according to FIG. 5 shown, which is supplemented by two restoring (48) and / or damping elements (50). The Operation of the return (48) and / or damping elements (50) is as previously described. In addition, the movable compensating means (30) is displaceably mounted on a rigid and straight guide rail (56). The second lever arm (24) engages a pivot bearing (58) on the movable compensating means (30). If the second lever arm (24) pivots about the pivot bearing point (34) due to a reactive force (36) acting on the first lever arm (22), the movable compensating means is displaced along the guide rail (56). Further developments of the guidance of the movable compensating means (30) are possible by means of special, for example hyperbolic or parabolic, and / or non-rigid guide rails (56).

Die Figuren 8a und 8b zeigen zwei Ausführungsformen eines weiteren Ausführungsbeispiels einer erfindungsgemäßen Handwerkzeugmaschine (10). Abweichend zu den im Vorhergehenden beschriebenen Ausführungsbeispielen sind der erste Hebelarm (22) und der zweite Hebelarm (24) durch mindestens eine Schub-Schwenk-Getriebevorrichtung (60), insbesondere zum Beispiel ein Zahnstangen-Zahnrad-Getriebe oder ein Schubstangen-Reibrad-Getriebe, miteinander wirkverbunden. Dabei weist der erste Hebelarm (22) ein Schubelement (62), insbesondere zum Beispiel eine Zahnungsstrecke oder Reibstrecke, auf. Dieses Schubelement (62) ist auf der dem beweglichen Ausgleichsmittel (30) zugewandten Seite des ersten Hebelarms (22) angeordnet. Der zweite Hebelarm (24) ist vorzugsweise fest mit einem Schwenkelement (64), hier insbesondere als kreisförmiges (64a, Fig. 8a) oder zykloides (64b, Fig. 8b) Zahnrad oder Reibrad ausgeführt, verbunden. Das Schwenkelement (64) ist um eine fest, vorzugsweise starr mit dem Handgriff (16) verbundene Schwenkachse (66) drehbar gelagert.The FIGS. 8a and 8b show two embodiments of another embodiment of a hand tool of the invention (10). Notwithstanding the embodiments described above, the first lever arm (22) and the second lever arm (24) by at least one thrust-pivot gear device (60), in particular, for example, a rack-and-pinion gear or a push rod-friction gear, interacting with each other. In this case, the first lever arm (22) on a thrust element (62), in particular, for example, a Zahnungsstrecke or Reibstrecke on. This thrust element (62) is arranged on the side of the first lever arm (22) facing the movable compensating means (30). The second lever arm (24) is preferably fixed to a pivoting element (64), here in particular as a circular (64a, Fig. 8a ) or cycloids (64b, Fig. 8b ) Gear or friction wheel, connected. The pivoting element (64) is rotatably mounted about a fixed, preferably rigidly connected to the handle (16) pivot axis (66).

Analog zu den im Vorhergehenden beschriebenen Ausführungsbeispielen erzeugt die Antriebsvorrichtung (16) eine Reaktivkraft (36), welche das Maschinengehäuse (14) in Bewegung versetzt. Der mit dem Maschinengehäuse (14) im Wesentlichen starr verbundene erste Hebelarm (22) überträgt diese Bewegung über die Schub-Schwenk-Getriebevorrichtung (60) auf den zweiten Hebelarm (24). Durch die von der Schwenkachse (66) gegenüberliegende Anordnung der Schub-Schwenk-Getriebevorrichtung (60) einerseits und des beweglichen Ausgleichmittels (30) andererseits wird die Bewegungsrichtung am beweglichen Ausgleichsmittel (30) relativ zur Bewegung des Maschinengehäuses (14) umgekehrt.Analogous to the embodiments described above, the drive device (16) generates a reactive force (36) which sets the machine housing (14) in motion. The first lever arm (22) substantially rigidly connected to the machine housing (14) transmits this movement via the push-pivot gear device (60) to the second lever arm (24). By the pivot axis (66) opposite arrangement of the thrust-pivot gear device (60) on the one hand and the movable balancing means (30) on the other hand, the movement direction is on movable compensating means (30) relative to the movement of the machine housing (14) vice versa.

Die dämpfende Wirkung des beweglichen Ausgleichsmittels (30) wird in dieser Anordnung unter anderem durch den Abstand B des beweglichen Ausgleichsmittels (30) von der Schwenkachse (66) sowie durch den Abstand A zwischen Schwenkachse (66) und dem Wirkungsbereich (68) der Schub-Schwenk-Getriebevorrichtung (60) bestimmt. Weiters kann die Wirkung des beweglichen Ausgleichsmittels (30) durch die Gestaltung eines Unrund-Schwenkelements (64b) beeinflusst werden.The damping effect of the movable compensating means (30) is in this arrangement, inter alia, by the distance B of the movable compensating means (30) from the pivot axis (66) and by the distance A between the pivot axis (66) and the effective range (68) of the thrust Swivel transmission device (60) determined. Furthermore, the effect of the movable compensation means (30) can be influenced by the design of a non-circular pivot member (64b).

Weiterbildungen dieser Ausführungsbeispiele ergeben sich durch Ergänzungen und Kombinationen mit Merkmalen der vorhergehenden Ausführungsbeispiele, insbesondere durch Kombination mit Rückstell- (48) und/oder Dämpfungselementen (50), welche auf das bewegliche Ausgleichsmittel (30) wirken, und/oder Ergänzung eines dritten Hebelarms (46) und/oder einer Führungsschiene nach Fig. 7.Further developments of these embodiments result from additions and combinations with features of the preceding embodiments, in particular by combination with restoring (48) and / or damping elements (50), which act on the movable compensating means (30), and / or supplementing a third lever arm ( 46) and / or a guide rail Fig. 7 ,

In den Figuren 9a und 9b ist eine weitere Ausführungsform einer erfindungsgemäßen Handwerkzeugmaschine mit mindestens einer Schub-Schwenk-Getriebevorrichtung (60) zwischen ersten Hebelarm (22) und zweitem Hebelarm (24), wobei das bewegliche Ausgleichsmittel (30) im Maschinengehäuse (14) angeordnet ist. Hierbei sind der erste Hebelarm (24) und das bewegliche Ausgleichsmittel (30) auf ein und derselben Seite der Schwenkachse (66) angeordnet. Dazu weist das Schubelement (62) vom beweglichen Ausgleichsmittel (30) weg. Der zweite Hebelarm (24) ist fest, vorzugsweise starr mit einem Schwenkelement (64) der Schub-Schwenk-Getriebevorrichtung (60) verbunden. Dabei weist das Schwenkelement (64) eine kreisförmige (64a, Fig. 9a), zykloide (64b, Fig. 9b) oder andere Gestalt auf.In the FIGS. 9a and 9b is a further embodiment of a hand tool according to the invention with at least one thrust-pivoting gear device (60) between the first lever arm (22) and the second lever arm (24), wherein the movable compensating means (30) in the machine housing (14) is arranged. Here, the first lever arm (24) and the movable compensating means (30) on one and the same side of the pivot axis (66) are arranged. For this purpose, the thrust element (62) away from the movable compensating means (30). The second lever arm (24) is fixed, preferably rigidly connected to a pivoting element (64) of the push-pivot gear device (60). In this case, the pivoting element (64) has a circular (64a, Fig. 9a ), cycloids (64b, Fig. 9b ) or other shape.

In seiner Wirkungsweise entsprechen diese Ausführungsbeispiele den Ausführungsformen aus Fig. 8a und 8b.In its operation, these embodiments correspond to the embodiments Fig. 8a and 8b ,

Weiterbildungen dieser Ausführungsbeispiele ergeben sich durch Ergänzungen und Kombinationen mit Merkmalen der vorhergehenden Ausführungsbeispiele, insbesondere durch Kombination mit Rückstell- (48) und/oder Dämpfungselementen (50), welche auf das bewegliche Ausgleichsmittel (30) wirken, und/oder Ergänzung eines dritten Hebelarms (46) und/oder einer Führungsschiene nach Fig. 7.Further developments of these embodiments result from additions and combinations with features of the preceding embodiments, in particular by combination with restoring (48) and / or damping elements (50), which act on the movable compensating means (30), and / or supplementing a third lever arm (46) and / or a guide rail Fig. 7 ,

Durch weitere, alternative Anordnungen mit mindestens zwei, vorzugsweise drei oder vier Hebelarmen, die eine Umlenkung einer auf das Maschinengehäuse (14) wirkenden Reaktivkraft auf ein bewegliches Ausgleichsmittel (30) derart bewerkstelligen, dass das bewegliche Ausgleichsmittel (30) dämpfend auf die Bewegung des Handgriffs (16) wirkt, sind weitere vorteilhafte Weiterbildungen und Ergänzungen der erfindungsgemäßen Handwerkzeugmaschine (10) möglich.By further, alternative arrangements with at least two, preferably three or four, lever arms which effect a deflection of a reactive force acting on the machine housing (14) onto a movable compensating means (30) such that the movable compensating means (30) dampens the movement of the handle (16) acts, further advantageous developments and additions of the hand tool (10) according to the invention are possible.

In einigen Fällen kann sich eine Anordnung ähnlich dem Ausführungsbeispiel nach Figur 7 mit einem nicht starr, sondern beweglich mit dem beweglichen Ausgleichsmittel (30) verbunden zweiten bzw. dritten Hebelarm (24, 42) als vorteilhaft erweisen. Neben der in diesem Ausführungsbeispiel gezeigten Ausführungsform sind weitere Anbindungsvarianten des beweglichen Ausgleichsmittels (30) mit dem auf das bewegliche Ausgleichsmittel (30) wirkenden zweiten bzw. dritten Hebelarm (24, 42) wie z.B. eine Zahnung oder alternative formschlüssige Verbindung denkbar.In some cases, an arrangement similar to the embodiment may FIG. 7 with a not rigidly, but movably connected to the movable compensating means (30) second or third lever arm (24, 42) prove to be advantageous. In addition to the embodiment shown in this embodiment, further connection variants of the movable compensating means (30) with the second or third lever arm (24, 42) acting on the movable compensating means (30), such as a toothing or alternative form-fitting connection, are conceivable.

Alternativ oder ergänzend lässt sich auf Basis von Seil- und/oder Bowdenzügen und/oder pneumatischen und/oder hydraulischen Elementen ein geeignetes, erfindungsgemäßes Umlenksystem (20) aufbauen.Alternatively or additionally, based on cable and / or Bowden cables and / or pneumatic and / or hydraulic elements, a suitable, inventive deflection system (20) build up.

Figur 10 zeigt eine erfindungsgemäße Handwerkzeugmaschine (10), bei der das Umlenksystem (20) auf einer Seilzugvorrichtung (68) aufgebaut ist. Die Seilzugvorrichtung (68) umfasst mindestens eine, vorzugsweise zwei, drei oder mehrere Umlenkrollen (70). Die Umlenkrollen (70) sind über je eine Drehachse (72) drehbar im Handgriff gelagert, wobei die Drehachsen (72) fest, vorzugsweise starr mit dem Handgriff verbunden sind. Ferner umfasst die Seilzugvorrichtung (68) ein Zugelement (74), hier als Zugseil (74a) ausgebildet. Dieses ist mit seinem ersten Seilende (76) mit dem Maschinengehäuse (14) vorzugsweise fest verbunden. Im vorliegenden Beispiel ist das erste Seilende (76) an einer Befestigungsöse (78) am Maschinengehäuse (14) befestigt. An einem zweiten Seilende (80) ist das bewegliche Ausgleichsmittel (30) vorzugsweise fest verbunden. FIG. 10 shows a hand tool (10) according to the invention, in which the deflection system (20) is constructed on a cable pulling device (68). The cable pull device (68) comprises at least one, preferably two, three or more deflection rollers (70). The deflection rollers (70) are rotatably mounted in the handle via a respective axis of rotation (72), wherein the axes of rotation (72) are fixed, preferably rigidly connected to the handle. Furthermore, the cable pull device (68) comprises a tension element (74), here designed as a pull cable (74a). This is preferably firmly connected with its first cable end (76) with the machine housing (14). In the present example, the first end of the rope (76) attached to a mounting lug (78) on the machine housing (14). At a second end of the rope (80), the movable compensating means (30) is preferably fixedly connected.

Darüber hinaus weist die Seilzugvorrichtung (68) ein Rückstellelement (82), hier als Rückstellfeder (82a) ausgeführt, auf. Das Rückstellelement (82) ist zwischen einer inneren Stirnfläche (84) und dem beweglichen Ausgleichselement (30) so angeordnet, dass beim Auftreten einer Zugkraft FZ am Zugseil eine Rückstellkraft FR auf das bewegliche Ausgleichsmittel wirkt. In einer bevorzugten Ausführung ist das Rückstellelement (82) idealer Weise so vorgespannt, dass bei einer Bewegung des Maschinengehäuses (14) auf Grund einer Reaktivkraft (36) das bewegliche Ausgleichsmittel (30) eine Ausgleichsbewegung in entgegengesetzter Richtung ausführen kann.In addition, the cable pull device (68) has a restoring element (82), designed here as a return spring (82a). The restoring element (82) is arranged between an inner end face (84) and the movable compensating element (30) such that upon the occurrence of a tensile force FZ on the traction cable a restoring force FR acts on the movable compensating means. In a preferred embodiment, the return element (82) is ideally biased so that when moving the machine housing (14) due to a reactive force (36), the movable compensating means (30) can perform a compensating movement in the opposite direction.

Erweiterungen und/oder alternative Ausführungsformen des Ausführungsbeispiels nach Fig. 10 ergeben sich durch Variation der Befestigung der Seilenden (76, 80), insbesondere mit Befestigungshaken, Befestigungsdurchführungen und/oder ähnlichen Befestigungselementen. Darüber hinaus sind Abwandlungen durch Variation der Anzahl von Umlenkrollen (70), insbesondere eine, drei, vier oder mehrere Umlenkrollen (70), und/oder der Seilführung möglich.Extensions and / or alternative embodiments of the embodiment according to Fig. 10 arise by varying the attachment of the cable ends (76, 80), in particular with fastening hooks, fastening bushings and / or similar fasteners. In addition, modifications by varying the number of deflection rollers (70), in particular one, three, four or more deflection rollers (70), and / or the cable guide are possible.

Bei Verwendung eines Bowdenzugs und/oder einer Zug-Schub-Kette als Zugelement (74) kann auf ein Rückstellelement (82) verzichtet werden.When using a Bowden cable and / or a train-push chain as a tension element (74) can be dispensed with a return element (82).

Ferner kann ein erfindungsgemäßes Umlenksystem (20) mit einer Seilzugvorrichtung (68) analog dem Ausführungsbeispiel Fig. 10 zu einer Anordnung des beweglichen Ausgleichsmittels (30) im Maschinengehäuse verwendet werden und/oder mit anderen Handbegriffformen und/oder - befestigungen, insbesondere mit zweitem Federelement (19), als Variation des Beispiels aus Fig. 10 erhalten werden.Furthermore, a deflection system (20) according to the invention with a cable pulling device (68) analogous to the embodiment Fig. 10 to an arrangement of the movable compensating means (30) are used in the machine housing and / or with other hand concept shapes and / or - fasteners, in particular with the second spring element (19), as a variation of the example Fig. 10 to be obtained.

In Figur 11 ist ein weiteres Ausführungsbeispiel einer erfindungsgemäßen Handwerkzeugmaschine mit einem Umlenksystem (20) gezeigt, welches als Druckkörpersystem (86) aufgebaut ist. In der hier gezeigten Ausführungsform ist das Druckkörpersystem (86) im Handgriff (16) angeordnet. Das Druckkörpersystem (86) weist dabei ein Speicherzylinder (90) und eine Druckleitung (92) auf. Ferner umfasst das Druckkörpersystem einen Ausgleichszylinder (94). Der Speicherzylinder (90) umschließt ein Speichervolumen (96). Der Ausgleichszylinder umfasst ein Ausgleichsvolumen (98). Das Speichervolumen (96) und das Ausgleichsvolumen (98) sind über die Druckleitung (92) miteinander verbunden, wobei das Gesamtvolumen mit einem Fluid (100), vorzugsweise einem Gas oder einer Flüssigkeit, insbesondere Hydrauliköl, gefüllt ist.In FIG. 11 a further embodiment of a hand tool according to the invention with a deflection system (20) is shown, which is constructed as a pressure-body system (86). In the embodiment shown here is arranged the pressure-body system (86) in the handle (16). The pressure-body system (86) has a storage cylinder (90) and a pressure line (92). Furthermore, the pressure-body system comprises a compensating cylinder (94). The storage cylinder (90) encloses a storage volume (96). The balancing cylinder comprises a compensation volume (98). The storage volume (96) and the compensation volume (98) are connected to one another via the pressure line (92), the total volume being filled with a fluid (100), preferably a gas or a liquid, in particular hydraulic oil.

Das Speichervolumen (96) wird auf einer Seite durch einen axial verschiebbaren Speicherkolben (102) begrenzt. Der erste Hebelarm (22) ist vorzugsweise fest, insbesondere einstückig, mit dem Speicherkolben (102) verbunden.The storage volume (96) is limited on one side by an axially displaceable accumulator piston (102). The first lever arm (22) is preferably fixed, in particular in one piece, connected to the accumulator piston (102).

Das Ausgleichsvolumen (98) wird auf einer Seite durch einen axial verschiebbaren Ausgleichskolben (104) begrenzt. Dieser ist fest, vorzugsweise starr mit dem beweglichen Ausgleichsmittel (30) verbunden. In einer bevorzugten Ausführung ist der Ausgleichskolben (104) einstückig mit dem beweglichen Ausgleichsmittel (30) gefertigt.The compensating volume (98) is limited on one side by an axially displaceable compensating piston (104). This is fixed, preferably rigidly connected to the movable compensating means (30). In a preferred embodiment, the balance piston (104) is made in one piece with the movable compensation means (30).

Auf der dem Ausgleichsvolumen (98) gegenüberliegenden Seite des Ausgleichskolbens (104) befindet sich ein, vorzugsweise mit Luft gefülltes Entlüftungsvolumen (106). Dieses ist mit einer Drossel (108) mit der Umgebung verbunden.On the compensating volume (98) opposite side of the balance piston (104) is a, preferably filled with air vent volume (106). This is connected to a throttle (108) with the environment.

Wirkt eine Reaktivkraft (36) über das Maschinengehäuse (14) auf den ersten Hebelarm (22) und damit auf den Speicherkolben (102), so wird das im Speichervolumen (96) befindliche Fluid komprimiert und verdrängt. Das Fluid weicht über die Druckleitung (92) in das Ausgleichsvolumen (98) aus. Dadurch werden der Ausgleichskolben (104) und damit das bewegliche Ausgleichsmittel entgegen der Bewegungsrichtung des Maschinengehäuses (14) verschoben. Die im, sich verkleinernden Entlüftungsvolumen (106) befindliche Luft kann über die Drossel (108) entweichen. Analog tritt eine Bewegungsumkehr des beweglichen Ausgleichsmittels (30) bezogen auf Maschinengehäuse (14) für den Fall auf, dass eine negative Reaktivkraft (36) auf das Maschinengehäuse (14) wirkt. Durch Wahl eines geeigneten Fluids (100), insbesondere eines Gases - zum Beispiel Luft, oder einer Flüssigkeit - z.B. ein Öl, kann die Dämpfungswirkung einer erfindungsgemäßen Schwingungsdämpfung beeinflusst werden. Ferner kann durch Dimensionierung der Volumina (96, 98, 106) sowie der Druckleitung (92) zusätzlich Einfluss auf die Dämpfungseigenschaften genommen werden. Darüber hinaus kann durch die Anordnung einer, insbesonderen variablen Leitungsdrossel in der Druckleitung (92) die Dämpfung beeinflusst werden. Schließlich liegt in der Dimensionierung der Drossel (108) ein zusätzlicher Abstimmungsparameter. Insbesondere kann die Drossel (108) derart variabel gestaltet werden, dass eine Steuerung der Dämpfungscharakteristik durch Benutzer möglich ist.If a reactive force (36) acts on the first lever arm (22) and thus on the accumulator piston (102) via the machine housing (14), the fluid in the accumulator volume (96) is compressed and displaced. The fluid deviates via the pressure line (92) into the compensation volume (98). As a result, the compensating piston (104) and thus the movable compensating means are displaced counter to the direction of movement of the machine housing (14). The air in the decreasing ventilation volume (106) can escape via the throttle (108). Similarly, a reversal of movement of the movable compensating means (30) relative to the machine housing (14) occurs in the event that a negative reactive force (36) acts on the machine housing (14). By selecting a suitable fluid (100), in particular a gas - for example air, or a liquid - for example an oil, the damping effect of a vibration damping according to the invention can be influenced. Furthermore, by dimensioning the volumes (96, 98, 106) and the pressure line (92) additional influence on the damping properties can be taken. In addition, the arrangement of a, in particular variable line throttle in the pressure line (92), the damping can be influenced. Finally, there is an additional tuning parameter in the dimensioning of the throttle (108). In particular, the throttle (108) can be made variable so that a control of the damping characteristic by users is possible.

Alternative Ausführungsformen des Ausführungsbeispiels nach Fig. 11 ergeben sich unter anderem durch eine Anordnung im Maschinengehäuse. Auch sind Kombinationen mit anderen Ausführungsbeispielen denkbar, insbesondere kann ergänzend mindestens ein Rückstell- (48) und/oder Dämpfungselementen (50), welches auf das bewegliche Ausgleichsmittel (30) wirkt, integriert werden.Alternative embodiments of the embodiment according to Fig. 11 arise among other things by an arrangement in the machine housing. Combinations with other embodiments are also conceivable, in particular, at least one restoring (48) and / or damping elements (50), which acts on the movable compensating means (30), can be integrated in addition.

Weitere vorteilhafte, erfindungsgemäßer Varianten können sich durch Aufteilung des beweglichen Ausgleichsmittels (30) aus vorzugsweise zwei, drei, vier oder mehreren, insbesondere als Gegengewichte ausgebildeten Teilelementen (30, 31) ergeben.Further advantageous variants according to the invention can be obtained by dividing the movable compensating means (30) from preferably two, three, four or more partial elements (30, 31), in particular counterweights.

Claims (13)

  1. Portable power tool (10) having at least one drive device (12), arranged in a machine housing (14), for driving a tool, having at least one vibration-damped handle (16), and having at least one movable compensating means (30) that is arranged in the machine housing (14) and/or handle (16) and is embodied as a movably mounted counterweight (31), characterized in that the at least one movable compensating means (30) is operatively connected to the handle (16) and/or the machine housing (14) via a deflecting system (20) such that at least one degree of freedom (46) of the movable compensating means (30) extends substantially along a main vibration axis (38) of the machine housing (14).
  2. Portable power tool (10) according to Claim 1, characterized in that the deflecting system (20) has at least one, preferably two, lever arms (22, 24) that are connected together in a rotatable manner, wherein a reactive force (36) caused by the drive device (12) and/or the tool acts on a first lever arm (22).
  3. Portable power tool (10) according to Claim 2, characterized in that the second lever arm (24) acts on the movable compensating means (30).
  4. Portable power tool (10) according to one of the preceding claims, characterized in that the deflecting system (20) is constructed from two lever arms (22, 24), wherein a first lever arm (22) that is connected firmly, preferably rigidly, to the handle (16) and passes through an engagement opening (26) in the machine housing (14) acts on a rotatable purchase point (34) of a second lever arm (24), said purchase point (34) being at a distance A from a rotary bearing point (28) that is connected firmly, preferably rigidly, to the machine housing (14).
  5. Portable power tool (10) according to one of the preceding claims, characterized in that the deflecting system (20) is constructed from two lever arms (22, 24), wherein a first lever arm (22) that is preferably rigidly connected to the machine housing (14) and passes through a passage opening (52) in the handle (16) acts on a rotatable purchase point (34) of a second lever arm (24), said purchase point (34) being at a distance A from a rotary bearing point (28) that is connected firmly, preferably rigidly, to the handle (16).
  6. Portable power tool (10) according to Claim 4 or 5, characterized in that the second lever arm (24) is connected firmly, preferably rigidly, to the movable compensating means (30), and is preferably embodied in one piece with the movable compensating means (30).
  7. Portable power tool (10) according to Claim 4 or 5, characterized in that the second lever arm (24) is connected to a third lever arm (42) in a rotatable manner at a distance B from the rotatable purchase point (34), and the third lever arm (42) acts on the movable compensating means (30).
  8. Portable power tool (10) according to Claim 7, characterized in that the third lever arm (42) is connected firmly, preferably rigidly, to the movable compensating means (30), and is preferably embodied in one piece with the movable compensating means (30).
  9. Portable power tool (10) according to Claim 1, characterized in that the deflecting system (20) has at least one push-pivot transmission device (60).
  10. Portable power tool (10) according to Claim 1, characterized in that the deflecting system (20) has at least one cable pull device (68).
  11. Portable power tool (10) according to Claim 1, characterized in that the deflecting system (20) comprises at least one pressure body system (86).
  12. Portable power tool (10) according to one of the preceding claims, characterized in that provision is made of at least one, preferably two restoring elements (48) which, in the event of a deflection of the movable compensating means (30) out of a rest position, exert a restoring force FR on the movable compensating means (30).
  13. Portable power tool (10) according to one of the preceding claims, characterized in that provision is made of at least one, preferably two damping elements (50) which, in the event of a deflection of the movable compensating means (30) out of a rest position, exert a damping action on the movement of the movable compensating means (30).
EP08774815.8A 2007-09-07 2008-07-07 Hand-held power tool with a handle vibration-damped by compensating means Not-in-force EP2190630B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007042721A DE102007042721A1 (en) 2007-09-07 2007-09-07 Hand tool with a vibration-dampened by a compensating means handle
PCT/EP2008/058740 WO2009033841A1 (en) 2007-09-07 2008-07-07 Hand-held power tool with a handle vibration-damped by compensating means

Publications (2)

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EP2190630A1 EP2190630A1 (en) 2010-06-02
EP2190630B1 true EP2190630B1 (en) 2015-02-25

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EP08774815.8A Not-in-force EP2190630B1 (en) 2007-09-07 2008-07-07 Hand-held power tool with a handle vibration-damped by compensating means

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US (2) US20100224068A1 (en)
EP (1) EP2190630B1 (en)
CN (1) CN101795826B (en)
DE (1) DE102007042721A1 (en)
RU (1) RU2492041C2 (en)
WO (1) WO2009033841A1 (en)

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DE102007042721A1 (en) 2009-03-12
CN101795826A (en) 2010-08-04
WO2009033841A1 (en) 2009-03-19
US20100224068A1 (en) 2010-09-09
EP2190630A1 (en) 2010-06-02
US8327949B2 (en) 2012-12-11
US20100206594A1 (en) 2010-08-19
RU2010112943A (en) 2011-10-20
CN101795826B (en) 2012-12-05
RU2492041C2 (en) 2013-09-10

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