EP2176037A1

EP2176037A1 - Auxiliary handle device

Info

Publication number: EP2176037A1
Application number: EP08760624A
Authority: EP
Inventors: Roswitha Eicher; Stefan Heess; Joerg Maute; Florian Esenwein; Bernhard Eicher; Marcus Schuller
Original assignee: Robert Bosch GmbH
Current assignee: Robert Bosch GmbH
Priority date: 2007-08-06
Filing date: 2008-06-06
Publication date: 2010-04-21
Also published as: DE102007037049A1; WO2009019053A1

Abstract

The invention proposes an auxiliary handle device, in particular for a hand-held power tool, having an auxiliary handle (12a-k) and at least one damping unit (14a-k) which is intended to damp vibrations and has at least one absorber mass unit (16a-k).

Description

title

Auxiliary handle device

State of the art

The invention is based on an auxiliary handle device according to the preamble of claim 1.

An auxiliary handle device for a hand-held power tool with an auxiliary handle and a damping unit is already known. The damping unit is provided for damping vibrations.

Advantages of the invention

It is an auxiliary handle device, in particular for a

Hand tool, proposed with an additional handle and at least one damping unit, which is provided for damping vibrations and which has at least one absorber mass unit. In this context, a "absorber mass unit" should be understood to mean, in particular, a unit which has at least one mass element which is excited within a designated frequency range of an output oscillation and / or an exciter oscillation to a counter-oscillation which is opposite to the output oscillation or the exciter oscillation An "additional handle" of the auxiliary handle device is to be understood as meaning an area and / or a component and / or an element which constitutes an application, in particular a gripping, by one hand or both hands an operator, in order to guide a hand tool by means of the auxiliary handle device, is provided, and in particular next to another handle, in particular the main handle, in addition to the hand tool is attachable, wherein the auxiliary handle device is arranged laterally on the hand tool and / or can be dismantled without tools by an operator on the power tool and / or arranged in a front, near the tool area of the power tool and / or the auxiliary handle is rod-shaped. By means of an embodiment according to the invention, an advantageous vibration damping adapted to a vibration of the hand tool machine can be achieved with a vibration transmission to the auxiliary handle device and a high level of user comfort can advantageously be achieved for an operator. The absorber mass unit preferably generates active countervibrations which are excited by vibrations and / or vibrations of the handheld power tool, the generated countervibrations of the absorber mass unit counteracting the output vibrations of the handheld power tool in the region of the auxiliary handle. The auxiliary handle device according to the invention is basically used in conjunction with all hand tool machines that appear useful to the person skilled in the art, in which, in particular, guidance of hand tool machines by means of the additional handle is made easier for an operator. Due to its damping characteristic, the auxiliary handle device is particularly advantageous in connection with an angle grinder.

Furthermore, it is proposed that the auxiliary handle has a gripping sleeve, which forms a receiving region for the damping unit, whereby a structurally simple mounting and a compact, particularly space-saving arrangement of the damping unit can be achieved within the auxiliary handle device.

A particularly user-friendly design of the auxiliary handle or the auxiliary handle device can be advantageously achieved if the grip sleeve has a flow-damping structure.

If the absorber mass unit has at least one absorber mass element which is formed by a permanent magnet, it can therefore be used

Vibration behavior can be set advantageously by means of a magnetic force. In addition, an absorber mass element of the absorber mass unit can be kept in an advantageous rest position by means of the magnetic force, in particular if a damper means damping the absorber mass element is likewise formed by a permanent magnet and thus a particularly low-friction countervibration movement of the absorber mass unit can be achieved together with the handheld power tool during operation of the auxiliary handle device ,

Furthermore, it is proposed that the absorber mass unit has at least one absorber mass element, which is formed by a pinhole, whereby a particularly advantageous vibration absorption can be achieved according to a principle of a shock absorber. In addition, in the case of a plurality of absorber mass elements designed as pinhole diaphragms, a number of holes in the pinhole diaphragms can be varied and thus, in particular, vibrations of different frequencies can be absorbed.

In an advantageous development of the invention, it is proposed that the damping unit has at least one damping means which is provided for damping a movement of an absorber mass element of the absorber mass unit, thereby achieving a vibration-absorbing embedding of the absorber mass unit or of the titanium mass element within the damping unit can be. A particularly advantageous vibration absorption of the damping unit can be achieved if, in addition, the absorber mass unit has at least one absorber mass element that is movably arranged within the damping means.

Furthermore, it is proposed that the damping unit has at least one damping means for damping in an axial direction, which dampens a movement of at least one absorber mass element of the absorber mass unit along an axial direction of the auxiliary handle, whereby a vibration absorption in a preferred direction, in particular in the axial direction, achieved can be, as well as for a user of the auxiliary handle device a particularly precise guidance of the power tool, in particular in the axial direction, can be advantageously achieved. An "axial direction" is to be understood here as meaning in particular a direction which extends along a longitudinal extension of the auxiliary handle or the auxiliary handle device and in which preferably takes place a vibration transmission from the power tool to the auxiliary handle device.

It is further proposed that the damping unit has at least one damping means to a damping in a radial direction, the movement of at least one absorber mass element of the absorber mass unit in the radial direction of the auxiliary handle Ia, whereby a vibration absorption in the radial direction advantageously achieved and thus a particular exact guidance of the power tool, especially in the axial direction, can be achieved for an operator. In an advantageous embodiment of the invention, the damping means for damping in the axial direction and the damping means for damping in the radial direction may be at least partially formed integrally, so that advantageously additional components, space, installation costs and costs can be saved.

In addition, it is advantageous if at least one damping parameter can be set in at least one direction by means of the damping means, whereby a damping behavior of the damping unit can advantageously be adapted to a vibration behavior and thus a comfortable and vibration-reduced guidance of the handheld power tool by means of the auxiliary handle device for an operator can be achieved can.

Advantageously, the damping means is formed by a damping fluid, whereby by means of a flow change in the damping fluid, a temperature change, a voltage change and / or further changes of a Dämpfungsflüssigkeitspa- rameters particularly fast adaptation of a damping parameter of the damping unit to a momentary vibration behavior within the auxiliary handle device can be achieved can. In this case, the damping fluid is preferably formed by a pure liquid, by a suspension and / or further damping fluids that appear appropriate to the person skilled in the art. Furthermore, it is advantageous if the damping means is formed by a spring element, whereby a structurally simple and in particular cost-effective damping, preferably along a damping direction of the spring element, can be achieved. A "spring element" is to be understood here as meaning, in particular, an element which is provided for the purpose of vibration damping or absorption of vibrations to form an elastic deformation. or a spring element made of a rubber-like material, in particular of an elastomer, and / or further spring elements which appear to be useful to the person skilled in the art.

In an advantageous development of the invention, it is proposed that the auxiliary handle device comprises a fastening unit to a positive and / or non-positive connection with the power tool, which is at least partially formed integrally with the absorber mass unit, which advantageously further components, space, installation costs and costs can be saved.

drawing

Further advantages can be found in the following description of the drawing. In the drawings, embodiments of the invention are shown. The drawing, the description and the claims contain numerous features in combination. The person skilled in the art will expediently also consider the features individually and combine them into meaningful further combinations. Show it:

1 shows a handheld power tool with an additional handle device according to the invention in a schematic representation,

2 shows the auxiliary handle device with a damping unit in a sectional view, 3 shows the auxiliary handle device, which has an alternative damping unit with a damping in a radial and axial direction, in a sectional view,

4 shows the auxiliary handle device, which has an alternative damping unit with pinhole diaphragms, in a sectional illustration,

5 shows the auxiliary handle device, which has an alternative damping unit with permanent magnets, in a sectional view, FIG. 6 shows the auxiliary handle device, which has an alternative damping unit with movable absorber mass elements, in a sectional illustration,

7 shows the auxiliary handle device, which has an alternative damping unit with an adjustable damping parameter, in a sectional illustration,

8 shows the auxiliary handle device, which has an alternative damping unit with an absorber mass element formed integrally with a fastening unit, in a sectional illustration, FIG. 9 shows the auxiliary handle device, which has an alternative damping unit with absorber mass elements formed by metal balls, in a sectional illustration,

10 shows the auxiliary handle device, which has an alternative damping unit with a damping fluid formed by an oil, in a sectional illustration and

Fig. 11, the auxiliary handle device, which has an alternative damping unit and a comb-like grip sleeve, in a sectional view.

Description of the embodiments

FIG. 1 shows a hand-held power tool 134a designed by an angle grinder in a view from above. The angle grinder comprises a housing 136a and a main handle 138a integrated in the housing 136a. The main handle 138a extends on a side 142a facing away from a tool 140a formed by a cutting disk in the direction of a longitudinal axis. direction 144a of the angle grinder. At a front, tool-near area 146a of the angle grinder an auxiliary handle device 10a is arranged on this, which extends transversely to the longitudinal direction 144a of the angle grinder.

FIG. 2 shows the auxiliary handle device 10a with an additional handle 12a, a fastening unit 66a and a damping unit 14a. The auxiliary handle 12a has a grip sleeve 18a, which extends along a main extension direction 68a of the auxiliary handle device 10a. The grip sleeve 18a forms with a radially inwardly facing surface 70a a receiving area 20a, which is provided for receiving the damping unit 14a. The receiving region 20a is cylindrical in shape along the main extension direction 68a. The fastening unit 66a, which is provided for a screw connection with the hand tool 134a, has a bolt-shaped fastening element 72a formed by a screw element, which is rotationally fixed by means of a material, force and force along the main extension direction 68a at an end region 74a of the auxiliary handle 12a / or positive connections is arranged on the auxiliary handle 12a.

In addition, the auxiliary handle 12a or the grip sleeve 18a has on a radially outwardly directed surface 76a along the main extension direction 68a of the auxiliary handle 12a an outwardly curved shape, so that a particularly good grip for an operator of the auxiliary handle device 10a is achieved. Along the main extension direction 68a, a bead-like elevation 82a, 84a is arranged at end regions 74a, 80a of the grip sleeve 18a, which delimit a grip region of the grip sleeve 18a for an operator of the auxiliary handle device 10a along the main extension direction 68a. The two bead-like elevations 82a, 84a are arranged in a circumferential direction 86a, which runs perpendicular to the main extension direction 68a, on the additional handle 12a in a ring-like manner and extend radially outwardly from the auxiliary handle 12a. The bead-like elevations 82a, 84a prevent the operation of the auxiliary handle device 10a together with the craft Machine 134a slipping a hand of the operator in a leadership of the power tool 134a by means of the auxiliary handle device 10a or during a power transmission from the operator via the auxiliary handle device 10a on the hand tool 134a.

Within the cylindrical receiving region 20a of the auxiliary handle 12a, the damping unit 14a is arranged, which has a TiI- germasseneinheit 16a with a cylindrical absorber mass element 22a. The absorber mass element 22a has a main extension direction 88a which runs parallel to the main extension direction 68a of the auxiliary handle 12a. Furthermore, the damping unit 14a has a damping means 38a formed by a viscous damping fluid 64a and two further damping means 40a, 42a, each formed by a spring element designed as a helical spring.

By means of the two damping means 40a, 42a is the absorber mass element 22a in an axial direction 58a, which extends parallel to the main extension direction 68a, within the receiving area

20a stored. To support the two coil springs on the auxiliary handle 12a, the auxiliary handle 12a comprises at the end portion 74a facing the attachment unit 66a and at the end portion 80a facing away from the attachment unit 66a a wall 90a, 92a formed integrally with the grip sleeve 18a and perpendicular thereto are aligned to the main extension direction 68a. The two walls 90a, 92a define the receiving area 20a formed by the grip sleeve 18a along the main extension direction 68a. In addition, the two walls 90a, 92a in a central portion of each of the receiving portion 20a facing side 94a, 96a a cylindrical recess 98a, 100a, which is provided for receiving an end portion 102a, 104a one of the two coil springs. In principle, however, further arrangements of the coil springs on the grip sleeve 18a that appear to be appropriate to the person skilled in the art are also conceivable. At the absorber mass element 22a, the two coil springs are arranged on a side 106a facing the fastening unit 66a and on one of the abutments. fixing unit 66a opposite side 108a arranged in each case via a non-illustrated material, force and / or positive connection. The two coil springs are biased for damping along the axial direction 58a between the absorber mass element 22a and the walls 90a, 92a along the axial direction 58a. In an idle state of the auxiliary handle device 10a, the absorber mass element 22a is arranged along the axial direction 58a in a central subregion of the auxiliary handle 12a or of the receiving region 20a.

The receiving area 20a of the auxiliary handle 12a is filled with the viscous damping fluid 64a, in which the absorber mass element 22a is movably arranged. The absorber mass element 22a has a diameter 110a which is smaller than a diameter 112a of the receiving region 20a, so that the absorber mass element 22a is arranged spaced from the grip sleeve 18a within the receiving region 20a. The absorber mass element 22a enables a vibration damping by generating an active counter vibration in a vibration transmission to the auxiliary handle device and together with the damping fluid 64a and the two coil spring additionally a vibration damping according to a principle of a shock absorber. If the absorber mass element 22a is deflected in a vibration transmission, in particular in the axial direction 58a, and excited to a countervibration, the damping fluid 64a, together with the coil springs, damps a vibration movement of the absorber mass element 22a. The damping fluid 64a is thereby pressed between the absorber mass element 22a and the grip sleeve 18a into the space of the receiving region 20a that has been freed by the absorber mass element 22a, thereby achieving a damping of vibrations and vibrations. A damping characteristic can be adjusted by an operator of the auxiliary handle device 10a by exerting a pressure with his hand on the grip sleeve 18a and thereby reduces a gap size 114a between the absorber mass element 22a and the grip sleeve 18a and / or by means of a temperature of the hand a temperature of damping changed liquid 64a and thus influences a flow behavior of the damping fluid 64a.

FIGS. 3 to 11 show alternative exemplary embodiments. Substantially identical components, features and functions are basically numbered by the same reference numerals. To distinguish the embodiments, however, the reference numerals of the embodiments, the letters a to k are added. The following description is essentially limited to the differences from the exemplary embodiment in FIGS. 1 and 2, wherein reference can be made to the description of the exemplary embodiment in FIGS. 1 and 2 with regard to components, features and functions remaining the same.

FIG. 3 shows an auxiliary handle device 10b with an alternative damping unit 14b. The damping unit 14b comprises a damping mass unit 16b with a cylindrical absorber mass element 22b and further, each formed by a coil spring damping means 40b, 42b, 54b, 56b. The damping means 40b, 42b, 54b, 56b are sprayed with an auxiliary handle 12b of the auxiliary handle device 10b. Two of the damping means 40b, 42b are arranged along an axial direction 58b of the auxiliary handle 12b for axial vibration damping between the absorber mass element 22b and an end region 74b facing a fastening unit 66b and an end region 80b facing away from the fastening unit 66b. The remaining damping means 54b, 56b are arranged for vibration damping of the absorber mass element 22b in a radial direction 60b of the auxiliary handle 12b between a grip sleeve 18b of the auxiliary handle 12b and the absorber mass element 22b. The damping means 54b, 56b are uniformly spaced from one another in the circumferential direction of the auxiliary handle 12b for the purpose of uniform vibration damping in the radial direction 60b, with a number of the damping means 54b, 56b being able to vary in a further embodiment of the invention. FIG. 4 shows an additional handle device 10c with an alternative damping unit 14c. The damping unit 14c has an absorber mass unit 16c with three different TiI- mass elements 22c, 24c, 26c, which are each disk-shaped and formed by a pinhole 32c, 34c, 36c, wherein the individual pinhole apertures 32c, 34c, 36c a different number of apertures exhibit. Furthermore, the damping unit 14c has a damping means 38c formed by a viscous damping fluid 64c and four damping means 40c, 42c, 44c, 46c formed by a respective helical spring. The four coil springs are arranged along an axial direction 58c within a receiving area 20c of an auxiliary handle 12c. The receiving region 20c is filled with the viscous damping liquid 64c, in which the absorber mass elements 22c, 24c, 26c are movably arranged in the axial direction 58c. The four coil springs are arranged along the axial direction 58c between walls 90c, 92c of the auxiliary handle 12c in succession with one of the absorber mass elements 22c, 24c, 26c therebetween, the coil springs and pressure between the absorber mass elements 22c, 24c, 26c and the walls 90c, respectively. 92c are biased. A main extension surface 116c of the absorber mass elements 22c, 24c, 26c is aligned in each case perpendicular to the axial direction 58c, the absorber mass elements 22c, 24c, 26c abutting against the grip sleeve 18c in a radial direction 60c. The damping fluid 64 c and the coil springs are to a vibration damping of

Tilgermassenelemente 22c, 24c, 26c along the axial direction 58c provided and together with the absorber mass elements 22c, 24c, 26c there is a vibration damping according to a principle of a shock absorber, wherein by means of a different number of holes within the apertured diaphragms 32c, 34c, 36c vibrations of different Frequency can be absorbed advantageously.

FIG. 5 shows an auxiliary handle device 10d with an alternative damping unit 14d. The damping unit 14d comprises a damping means 38d formed by a viscous damping fluid 64d, two damping means 4Od, 42d formed by a respective permanent magnet 118d, 12Od and an absorber mass absorber. unit 16d with a Tilger- mass element 22d formed by a permanent magnet 3Od. The permanent magnets 118d, 12Od are arranged on an end region 74d facing a fastening unit 66d or on an end region 8Od facing away from the fastening unit 66d within a receiving region 2Od of a grip sleeve 18d, one of the two permanent magnets 118d being a south pole and the other permanent magnet 12Od being a north pole , The absorber mass element 22d is arranged along an axial direction 58d between the two permanent magnets 118d, 12Od, wherein a south pole of the absorber mass element 22d is directed in the direction of the permanent magnet 118d and a north pole of the absorber mass element 22d is directed in the direction of the permanent magnet 12Od. The permanent magnets 118d, 12Od have, on a side facing the absorber mass element 22d, a tapered, conical recess 126d, 128d, into each of which a tapered, conical pole formation 13Od, 132d of the

Tilgermassenelements 22d extends and the absorber mass element 22d can thereby be held in a position spaced from the grip sleeve 18d and the two permanent magnets 118d, 12Od rest position. In addition, vibration damping of the absorber mass element 22d in the axial direction 58d takes place by means of the permanent magnets 118d, 12Od. A vibration damping, in particular in the axial direction 58d, by means of the damping unit 14d is carried out according to a principle of a shock absorber. For this purpose, the absorber mass element 22d is movably arranged within the damping fluid 64d, the damping fluid 64d having a property which prevents ion formation of fluid molecules.

FIG. 6 shows an additional handle device 10e with an alternative damping unit 14e. The damping unit 14e comprises a damping means 38e formed by a viscous damping fluid 64e, a damping means 122e formed by a gas and an absorber mass unit 16e with a plurality of spherical absorber mass elements 22e, 24e, 26e, 28e. The absorber mass elements 22e, 24e, 26e, 28e have a diameter 11Oe which comprises a maximum of 20% of a diameter 112e of a receiving region 2Oe.

The absorber mass elements 22e, 24e, 26e, 28e are movably arranged in all directions within the damping fluid 64e. Become Vibrations are transmitted to the auxiliary handle device 10e, thereby the absorber mass elements 22e, 24e, 26e, 28e excited to vibrate, whereby formed by the vibrating absorber mass elements 22e, 24e, 26e, 28e gas bubbles within the damping liquid 64e, which together with the damping fluid 64e cause damping of the oscillatory motion of the absorber mass elements 22e, 24e, 26e, 28e. The vibration damping is independent of a preferred direction, so that takes place by means of the two damping means 38e, 122e vibration damping in an axial direction 58e and in a radial direction 6Oe.

FIG. 7 shows an additional handle device 10f with an alternative damping unit 14f. The damping unit 14f comprises an absorber mass unit 16f with a cylindrical absorber mass element 22f and two further damping means 4Of, 54f formed by an elastomer. The absorber mass element 22f has a diameter 11Of, which runs perpendicular to an axial direction 58f and is smaller than a diameter 112f of a receiving region 2Of of an auxiliary handle 12f, such that the titanium mass element 22f is spaced in a radial direction 6Of from a gripping sleeve 18f of the auxiliary handle 12f is arranged. At an end region 8Of of the auxiliary handle 12f facing away from a fastening unit 66f, the damping unit 14f has a further damping means 62f arranged on the absorber mass element 22f, which is formed by an adjusting screw which is provided for setting a damping parameter in the axial direction 6Of Adjustment screw with the grip sleeve 18f can be screwed. In a further embodiment of the invention, the adjusting screw and the Tilgermassenelement 22f may also be integrally formed. At an end portion 74f of the auxiliary handle 12f facing the attachment unit 66f, the first elastomer provided for axial vibration absorption is disposed between the end portion 74f and the absorber mass member 22f. By means of a rotation of the adjusting screw, a distance between the absorber mass element 22f and the end region 74f is varied, so that a pretension or a damping property can be set to a vibration absorption of the elastomer is. The second elastomer is disposed between the absorber mass element 22f and the grip sleeve 18f and provided for radial vibration absorption. In principle, it is also conceivable to form the elastomer for vibration absorption in the axial direction 58f and the elastomer for vibration absorption in the radial direction 6Of in one piece and / or to use a damping fluid instead of an elastomer.

FIG. 8 shows an auxiliary handle device 10g with an alternative damping unit 14g. The damping unit 14g comprises a damping mass unit 16g with a cylindrical absorber mass element 22g, which is formed integrally with a fastening element 72g of a fastening unit 66g, and a further damping element 38g, which is formed by a damping fluid 64g. The absorber mass element 22g extends along an axial direction 58g through an entire receiving area 20g and is supported in an end area 80g of an auxiliary handle 12g. For this purpose, the end region 80g has a cylindrical receiving region 124g for receiving the absorber mass element 22g. In addition, the end portion 80g is elastically attached to a grip sleeve 18g of the auxiliary handle 12g for absorbing vibration of the absorber mass member 22g in the axial direction 58g. Between the absorber mass element 22g and the grip sleeve 18g, the damping fluid 64g is arranged, which is provided for a radial vibration absorption of vibrations of the absorber mass element 22g. For a further vibration damping, the grip sleeve 18g has a flow-damping structure at a radially inwardly directed surface 70g.

FIG. 9 shows an additional handle device 10h with an alternative damping unit 14h. The damping unit 14h comprises an absorber mass unit 16h, which has three absorber mass elements 22h, 24h, 26h formed by metal balls, and three further damping means 48h, 50h, 52h, which are formed by a rubber sheath of the three absorber mass elements 22h, 24h, 26h. A diameter 110h of the absorber mass elements 22h, 24h, 26h together with the rubber jacket corresponds to a diameter 112h of one Receiving area 20h of a grip sleeve 18h, so that the rubber-coated absorber mass elements 22h, 24h, 26h abut against an inwardly directed surface 70h of the grip sleeve 18h. The absorber mass elements 22h, 24h, 26h are arranged successively along an axial direction 58h adjacent to one another or against walls 90h, 92h of an auxiliary handle 12h, lying within the receiving region 20h. The rubber-sheathed absorber mass elements 22h, 24h, 26h are at a vibration transmission to the auxiliary handle device 10h excited to counter-vibration and are provided for a vibration damping in the axial direction 58h and 60h in a radial movement of the absorber mass elements 22h, 24h, 26h.

FIG. 10 shows an additional handle device 10i with an alternative damping unit 14i. The damping unit 14i comprises an absorber mass unit 16i which has three absorber mass elements 22i, 24i, 26i formed by metal balls, a damping means 38i formed by a damping fluid 64i and four damping means 4Oi, 42i, 44i, 46i formed by a spring element. A diameter 11Oi of the absorber mass elements 22i, 24i, 26i corresponds to a diameter 112i of a receiving region 2Oi of a grip sleeve 18i, so that the absorber mass elements 22i, 24i, 26i abut against a radially inwardly directed surface 7Oi of the grip sleeve 18i. The absorber mass elements 22i, 24i, 26i are successively arranged along an axial direction 58i within the damping fluid 64i formed by an oil, between the individual absorber mass elements 22i, 24i, 26i or between an absorber mass element 22i, 26i and a wall 9Oi, 92i of an auxiliary handle 12i each one of the spring elements is arranged biased to pressure. A damping or absorption of vibrations preferably takes place along the axial direction 58i, in that the absorber mass elements 22i, 24i, 26i are excited to counter-oscillate or the damping fluid 64i and the spring elements damp a vibrational movement of the absorber mass elements 22i, 24i, 26i. The wall 92i facing away from a fastening unit 66i is fixedly arranged on the grip sleeve 18i of the auxiliary handle 12i by means of a snap ring 148i. FIG. 11 shows an additional handle device 10k with an alternative damping unit 14k. The damping unit 14k comprises an absorber mass unit 16k with a plurality of disc-shaped absorber mass elements 22k, which are integrally formed with a fastening element 72k of a fastening unit 66k, and another damping element 38k, which is formed by a viscous damping fluid 64k. Along an axial direction 58k, the absorber mass elements 22k are arranged uniformly spaced from one another. The absorber mass elements 22k are arranged within a receiving region 20k of a grip sleeve 18k of an auxiliary handle 12k, wherein the disk-shaped absorber mass elements 22k each have a main extension surface 116k which is aligned perpendicular to the axial direction 58k of the auxiliary handle 12k. Furthermore, the absorber mass elements 22k have a diameter 110k which is smaller than a diameter 112k of the receiving region 20k in the region of the absorber mass elements 22k, so that the absorber mass elements 22k are arranged at a distance from the grip sleeve 18k. On a radially inwardly directed surface 70k of the grip sleeve 18k, the grip sleeve 18k has a comb-like structure, so that a chamber-like receiving region is formed within the receiving region 20k for a respective absorber mass element 22k. Between the radially inwardly directed surface 70k of the grip sleeve 18k and the absorber mass elements 22k, the viscous damping fluid 64k is arranged, which is provided for dampening a vibration movement of the absorber mass elements 22k. In a further embodiment of the invention, a damping means 38k formed by an elastomer is conceivable at any time instead of a viscous damping fluid 64k. At an end region 74k of the auxiliary handle 12k facing the fastening unit 66k, the grip sleeve 18k is elastically connected to the end region 74k by means of a further damping means 40k formed by an elastomer for the purpose of axial vibration absorption.

Claims

claims

1. auxiliary handle device, in particular for a hand tool, with an auxiliary handle (12a-k) and at least one damping unit (14a-k), which is provided for damping vibrations and which has at least one absorber mass unit (16a-k).

Second auxiliary handle device according to claim 1, characterized in that the auxiliary handle (12a-k) has a grip sleeve (18a-k), which forms a receiving area (20a-k) for the damping unit (14a-k).

3. auxiliary handle device at least according to claim 2, characterized in that the grip sleeve (18g) has a flow-damping structure.

4. Additional handle device according to one of the preceding claims, characterized in that the absorber mass unit (16d) has at least one absorber mass element (22d) which is formed by a permanent magnet (30d).

5. auxiliary handle device according to one of the preceding claims che, characterized in that the absorber mass unit (16c) at least one absorber mass element (22c, 24c, 26c) which is formed by a pinhole (32c, 34c, 36c).

6. Additional handle device according to one of the preceding claims, characterized in that the damping unit (14a-k) at least one damping means (38a, 40a, 42a, 40b, 42b, 54b, 56b, 38c, 40c, 42c, 44c, 46c; 38d, 40d, 42d, 38e, 122e, 40f, 54f, 38g, 48h, 50h, 52h, 38i, 40i, 42i, 44i, 46i, 38k, 40k) adapted to damp a movement of an absorber mass element (22a, 22b; 22c, 24c, 26c, 22d, 22e, 24e, 26e, 28e, 22f, 22g, 22h, 24h, 26h, 22i, 24i, 26i, 22k) of the absorber mass unit (16a-k).

7. auxiliary handle device at least according to claim 6, characterized in that the absorber mass unit (16a; 16c-g; 16i; 16k) at least one absorber mass element (22a; 22c, 24c, 26c; 22d; 22e, 24e, 26e, 28e; 22f; 22g 22i, 24i, 26i, 22k) movably disposed within the damping means (38a; 38c-g; 38i; 38k).

8. Auxiliary handle device according to claim 6, characterized in that the damping unit (14a-f; 14h-k) comprises at least one damping means (40a, 42a; 40b, 42b; 40c, 42c, 44c, 46c; 4Od, 42d; 38e; 4Of 4Oi, 42i, 44i, 46i, 38k) for damping in an axial direction (58a-f; 58h-k), which comprises a movement of at least one absorber mass element (22a; 22b; 22c, 22c; 24c, 26c; 22d; 22e, 24e, 26e, 28e; 22f; 22h, 24h, 26h; 22i, 24i, 26i; 22k) of the absorber mass unit (16a-f; 16h-k) along the axial direction (58a-f; 58h-k) of the auxiliary handle (12a-f; 12h-k).

9. Auxiliary handle device according to claim 6, characterized in that the damping unit (14b; 14e-h; 14k) comprises at least one damping means (54b, 56b; 38e; 54f; 38g; 48h, 50h, 52h; 38k) for damping in one 60e; 60e-h; 60k), which is a movement of at least one absorber mass element

(22b; 22e, 24e, 26e, 28e; 22f; 22g; 22h, 24h, 26h; 22k) of the absorber mass unit (16b; 16e-h; 16k) in the radial direction (60b; 60e-h; 16k) of the auxiliary handle (12b; 12e-h; 16k) attenuates.

10. Auxiliary handle device according to at least claim 8 and 9, characterized in that the damping means (38e, 48h, 50h, 52h, 38k) for damping in the axial direction (58e, 58h, 58k) and the damping means (38e, 48h, 50h, 52h ; 38k) for damping in the radial direction (6Oe; 60h; 60k) are at least partially formed in one piece.

11. auxiliary handle device at least according to claim 6, characterized in that the damping unit (14a, 14f) at least one Damping means (38a, 62f) for adjusting at least one damping parameter in at least one direction (60a; 60f).

12. auxiliary handle device at least according to claim 6, characterized in that the damping means (38a, 38c-e, 38g, 38i;

38k) is formed by a damping fluid (64a; 64c-e; 64g; 64i; 64k).

13. Auxiliary handle device according to claim 6, characterized in that the damping means (40a, 42a, 40b, 42b, 54b, 56b, 40c, 42c, 44c, 46c, 40d, 42d, 40f, 54f, 48h, 50h, 52h, 40i , 42, 44i, 46i) is formed by a spring element.

14. Additional handle device according to one of the preceding claims, characterized by a fastening unit (66g, 66k) for a positive and / or non-positive connection with the hand tool, which is formed at least partially in one piece with the absorber mass unit (16g, 16k) is.

15. Hand tool, in particular an angle grinder, with a main handle (138a-k) and an auxiliary handle device (10a-k) according to any one of the preceding claims.