EP2190630A1

EP2190630A1 - Hand-held power tool with a handle vibration-damped by compensating means

Info

Publication number: EP2190630A1
Application number: EP08774815A
Authority: EP
Inventors: Gerhard Meixner
Original assignee: Robert Bosch GmbH
Current assignee: Robert Bosch GmbH
Priority date: 2007-09-07
Filing date: 2008-07-07
Publication date: 2010-06-02
Anticipated expiration: 2028-07-07
Also published as: US20100224068A1; CN101795826A; WO2009033841A1; US8327949B2; DE102007042721A1; RU2010112943A; US20100206594A1; CN101795826B; RU2492041C2; EP2190630B1

Abstract

A hand-held power tool (10) is proposed, comprising a drive device (12) for driving a tool, which device is arranged in a housing (14) of the power tool and in which power tool the handle (16), which is movably connected to the housing (14) of the power tool, is vibration-damped by a movable compensating means (30). For this purpose, the movable compensating means (30) is operatively connected to the handle (16) and/or the housing (14) of the power tool by a deflecting system (20).

Description

description

title

Hand tool with a vibration-dampened by a compensating means handle

State of the art

The invention relates to a hand tool according to the preamble of the independent claims.

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 vibration-damped handle on. The movable compensating means is preferably arranged in the machine housing and / or in the handle. Preferably, 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.

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 vibrationally excited via the spring / damper system

Machine housing decoupled. 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. Disclosure of the invention

Advantages of the invention

The hand tool according to the invention has a movable

Compensation means, which operatively connected via a deflection system with the handle and / or the machine housing. By the deflection system, an effect of the movable compensating means 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. 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.

The measures listed in the dependent claims, advantageous refinements and improvements of the main claim features.

By the drive device of the power tool, especially when the drive of the tool is striking, such as e.g. Drill and / or chisel hammers, vibrations generated along a major axis of vibration. By a degree of freedom of the movable compensating means, which extends substantially in a main axis of vibration of the machine housing, an advantageous, particularly compact design of the hand tool of the invention can be achieved.

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 can be a achieve very effective and cost-effective implementation of the hand tool of the invention.

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 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 engagement opening in the machine housing, this first lever arm engages a rotatable engagement 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.

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 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.

A particularly inexpensive embodiment of an inventive

Hand tool 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. 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.

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.

By using at least one thrust-pivoting gear device in the deflection system, a particularly strong effect of the movable compensating means is achieved.

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 invention

Hand tool 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. This will be advantageous

Degrees of freedom for the design of the damping system won.

A further advantageous development of the portable power tool according to the invention can be achieved by the arrangement of at least one, preferably two damping elements on the movable compensating means realize. 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.

A handle for a hand tool, in particular a drill and / or hammer, is movably connected to a machine housing of the power tool. In addition, the handle has at least one vibration-damping movable compensating means, preferably at least one movably mounted counterweight. According to the invention, the movable compensating means is operatively connected via a deflection system with the handle and / or the machine housing, whereby a particularly effective and at the same time cost-effective vibration damping of the handle is achieved.

Description of the drawings

Some embodiments of the invention are illustrated in the drawings and explained in more detail in the following description. Show it:

1 shows a schematic side view of a hand tool according to the invention with a two-armed deflection system,

FIG. 2 shows a schematic side view of a hand-held power tool according to the invention with a three-arm deflection system,

FIG. 3 shows a hand-held power tool according to the invention as in FIG. 2 with at least one restoring and / or damping element,

FIG. 4 shows a schematic side view of a handheld power tool according to the invention with a two-armed deflection system, wherein the movable compensation means is arranged in the handle, FIG. 5 shows an alternative embodiment to FIG. 4,

FIG. 6 shows an expanded embodiment of FIG. 4 with at least one restoring and / or damping element,

Figure 7 shows an expanded embodiment of Figure 5 with a restoring and / or damping element.

FIG. 8a shows an alternative embodiment to FIG. 4 using a push-pivot transmission device with a circular pivot element

FIG. 8b shows an alternative embodiment to FIG. 8b with a cycloidal pivot element

Figures 9a and 9b show alternative embodiments to Figure 1 using a push-pivot gear device with a circular or cycloidal pivoting element

Figure 10 shows a further embodiment analogous to Figure 4 with a cable pulling device as a deflection system

Figure 11 shows a further embodiment analogous to Figure 4 with a pressure hull system as Umlenksystem

Description of the embodiments

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.

The hand tool (10) according to the invention shown in FIG. 1 has a machine housing (14) and a handle (16) connected to the machine housing (14). 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 over a

Spring element (18) connected to 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.

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).

The first lever arm (22) is rigidly connected to the handle (16). By a

Engaging opening (26) projects the first lever arm (22) 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).

The second lever arm (24) of the deflection system (20) is in the machine housing

(14) arranged. 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).

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.

In the following, the function of the hand tool (10) according to the invention will be explained. By the effect of

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).

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 away from the pivot bearing point (28)

Armende (32) of the second lever arm (24) of this movement only delayed. 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), arises between the handle (16) and the

Machine housing (14) has a relative movement (40). By this relative movement (40) vibrations or vibrations with reduced amplitude are passed to the handle.

By dimensioning the movable compensating means (30), so the

Counterweight (31), a vote of the damping behavior over the hand tool (10) is possible.

About the division of the distances A and B can during the design of the power tool (10), the effect of the movable compensating means

(30). The distances A and B thus act as design parameters.

Figure 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 further development of the hand tool (10) according to the invention results from the use of bearing elements such as e.g. Sliding, needle, roller or roller bearings for

Improvement of 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). 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.

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).

A preferred development of the invention

Hand tool (10) is shown in FIG. 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 return (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 designed in FIG. 3 in a particularly preferred form as spring elements (49).

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.

Damping elements (50), however, have a damping effect on the movements of the movable compensating means (30).

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

Resetting (48) and / or damping elements (50) be firmly connected to the movable compensating means or the machine housing or only abut against these.

FIG. 4 shows a further exemplary embodiment of a device according to the invention

Hand tool (10) 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).

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). 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.

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).

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).

Notwithstanding the preceding embodiment, an embodiment is shown in Figure 5, 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.

The embodiment shown in Figure 6 combines the embodiment of Figure 4 with two reset (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

Figure 3 described. Also analogous developments of the hand tool of the invention (10) as in the description of Figure 3 are possible.

FIG. 7 shows an embodiment according to FIG. 5, which is supplemented by two return (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).

Figures 8a and 8b show two embodiments of another embodiment of a hand tool (10) according to the invention. 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 push element (62) is on the movable

Balancing means (30) facing side of the first lever arm (22). The second lever arm (24) is preferably fixedly connected to a pivoting element (64), here in particular as a circular (64a, FIG. 8a) or cycloidal (64b, FIG. 8b) toothed wheel or friction wheel. The pivoting element (64) is a fixed, preferably rigidly connected to the handle (16) pivot axis

(66) rotatably mounted.

Analogous to the embodiments described above, the drive device (16) generates a reactive force (36) which sets the machine housing (14) in motion. The one with the machine housing

(14) substantially rigidly connected first lever arm (22) transmits this movement via the push-pivot gear device (60) on 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.

The damping effect of the movable compensating means (30) is in this arrangement, inter alia, by the distance B of the movable

Compensation means (30) of the pivot axis (66) and by the distance A between the pivot axis (66) and the effective range (68) of the push-pivot gear device (60) determined. Furthermore, the effect of the movable compensating means (30) can be influenced by the design of a non-circular pivot member (64b).

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 according to FIG. 7.

FIGS. 9a and 9b show a further embodiment of a hand-held power tool according to the invention with at least one thrust

A 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), cycloidal (64b, Fig. 9b) or other shape.

In its mode of operation, these embodiments correspond to the embodiments of FIGS. 8a and 8b.

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 according to FIG.

By further, alternative arrangements with at least two, preferably three or four lever arms, which effect a deflection of a force acting on the machine housing (14) reactive force on a movable compensating means (30) such that the movable compensating means (30) damping the movement of the handle (16) acts, further advantageous developments and additions of the hand tool (10) according to the invention are possible.

In some cases, an arrangement similar to the embodiment of Figure 7 with a non-rigid, but movable with the movable

Compensation means (30) connected to the second and third lever arm (24, 42) prove to be advantageous. In addition to the embodiment shown in this embodiment, further attachment variants of the movable compensating means (30) to the second and third lever arms (24, 42) acting on the movable compensating means (30), e.g. a toothing or alternative positive connection conceivable.

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.

FIG. 10 shows a hand-held power tool (10) according to the invention, in which the deflection system (20) is constructed on a cable pull device (68). The cable pull device (68) comprises at least one, preferably two, three or more deflection rollers (70). The deflection rollers (70) are each about a rotation axis

(72) rotatably mounted in the handle, wherein the axes of rotation (72) 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.

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.

Extensions and / or alternative embodiments of the

Embodiment of FIG. 10 result 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 pulleys (70), in particular one, three, four or more pulleys (70), and / or the

Rope guidance possible.

When using a Bowden cable and / or a train-push chain as a tension element (74) can be dispensed with a return element (82).

Furthermore, a deflection system (20) according to the invention with a cable pulling device (68) analogous to the embodiment of FIG. 10 can be used to dispose the movable compensating means (30) in the machine housing and / or by other hand conceptual forms and / or fastenings, in particular with a second spring element (19), as a variation of the

Example of FIG. 10 are obtained.

FIG. 11 shows a further exemplary embodiment of a hand-held power tool according to the invention with a deflection system (20), 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 compensation 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).

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.

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 are 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 embodiments of the embodiment of FIG. 11 result, inter alia, by an arrangement in the machine housing. Also are

Combinations with other embodiments conceivable, in particular, at least one reset (48) and / or damping elements (50), which acts on the movable compensating means (30), in addition to be integrated.

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

claims

1. Hand tool (10), with at least one, in a machine housing (14) arranged drive device (12) for driving a tool and at least one, at least one movable, preferably in the machine housing (14) and / or handle (16) arranged , Preferably as a movably mounted counterweight (31) running compensating means (30), vibration-damped handle (16), characterized in that the movable compensating means (30) via a deflection system (20) with the handle (16) and / or the machine housing

(14) is operatively connected.

2. Hand tool (10) according to claim 1, characterized in that at least one degree of freedom (46) of the movable compensating means (30) extends substantially in a main axis of vibration (38) of the machine housing (14).

3. Hand tool (10) according to claim 1 or 2, characterized in that the deflection system (20) at least one, preferably two, rotatably interconnected lever arms (22, 24), wherein on a first lever arm (22) one by the drive device (12) and / or the tool causes reactive force (36) to act.

4. Hand tool (10) according to claim 3, characterized in that the second lever arm (24) acts on the movable compensating means (30).

5. Hand tool (10) according to one of the preceding claims, characterized in that the deflection system (20) consists of two lever arms (22, 24), one fixed to the handle (16), preferably rigidly connected, by an engagement opening ( 26) engaging in the machine housing (14) first lever arm (22) at one, at a distance A to the machine housing (14) fixed, preferably rigidly connected pivot bearing point (28) rotatable engagement point (34) of a second lever arm (24) engages ,

6. Hand tool (10) according to one of claims 1 to 4, characterized in that the deflection system (20) consists of two lever arms (22, 24), wherein one with the machine housing (14) preferably rigidly connected, through a passage opening ( 52) in the handle (16) passing through first lever arm (22) on one, at a distance A to one with the

Handle (16) fixed, preferably rigidly connected pivot bearing point (28) rotatable engagement point (34) of a second lever arm (24) engages.

7. Hand tool (10) according to claim 5 or 6, characterized in that the second lever arm (24) with the movable compensating means (30) fixed, preferably rigidly connected, preferably in one piece with the second lever arm (24) is executed.

8. Hand tool (10) according to claim 5 or 6, characterized in that the second lever arm (24) at a distance B from the rotatable engagement point (34) is rotatably connected to a third lever arm (42), and the third lever arm (42) on the movable compensating means (30) acts.

9. Hand tool (10) according to claim 8, characterized in that the third lever arm (42) fixed to the movable compensating means (30), preferably rigidly connected, preferably in one piece with the movable compensating means (30).

10. Hand tool (10) according to claim 1 or 2, characterized in that the deflection system (20) has at least one push-pivot transmission device (60).

11. Hand tool (10) according to claim 1 or 2, characterized in that the deflection system (20) has at least one cable pulling device (68).

12. Hand tool (10) according to claim 1 or 2, characterized in that the deflection system (20) comprises at least one pressure-body system (86).

13. Hand tool (10) according to any one of the preceding claims, characterized in that at least one, preferably two return elements (48) are provided, which at a deflection of the movable compensating means (30) from a rest position, a restoring force FR on the movable compensating means ( 30) exercise.

14. Hand tool (10) according to any one of the preceding claims, characterized in that at least one, preferably two damping elements (50) are provided which at a deflection of the movable compensating means (30) from a rest position attenuating to the movement of the movable compensating means ( 30) act.

15. Handle (16) for a hand tool (10), in particular a drill and / or chisel, which is movably connected to a machine housing (14) of the power tool (10) and at least one vibration-damping movable compensating means (30), preferably at least one movably mounted counterweight (31), characterized in that the movable compensating means 30 via a deflection system (20) with the handle (16) and / or the machine housing (14) is operatively connected.