EP2172311A1 - Manually operated machine tool with a handle assembly - Google Patents

Abstract

The machine tool (10a) i.e. agitating machine (11), has a tool holder (15) arranged at a longitudinal end area (13) of a housing (12a) for accommodating and holding a tool (16) i.e. agitating bar (17). A handle arrangement (30a) is provided with two handle parts (31a, 32a) that comprise two handle portions (33a, 34a). The handle parts are supported at the housing for adjustment of a longitudinal distance (28) of the handle portions and movable to the longitudinal end area of the housing by housing bearings (35a, 36a).

Description

The invention relates to a hand-held machine tool, in particular a stirring machine for mixing building material, with a drivable by a drive motor, arranged at a Längsendbereich a housing of the hand-held machine tool holder for receiving and holding a tool, in particular a stirring rod, with a handle assembly with a first handle portion having a first handle portion and a second, a second handle portion having handle portion for gripping by an operator.

The tool is preferably a stirring tool, for example a stirring rod, which is accommodated in the tool holder, for example screwed in or inserted in the manner of a bayonet. The free end of the stirring tool dips into the building material present in a mixing vessel, for example adhesive, gypsum or the like, and stirs it, for example, by adding water. The mixing vessel is usually on the ground. Thus, the total length consisting of stirring rod, tool receiving device and housing determines a working height of an operator. If the operator is small, this overall layout of the hand machine tool is too high, too low for large operators. Overall, the handling is uncomfortable.

A similar problem also arises with manual machine tools, which are used, for example, overhead for a ceiling treatment.

A hand-held machine tool of the type mentioned is, for example, in the unpublished DE 10 2008 031 839.6 described. To adjust a longitudinal distance between the free end of the tool, this hand-held machine tool, which is in particular a stirring machine, a tool-receiving device on which the tool holder is arranged, wherein the tool holder at least two longitudinal positions with respect to the longitudinal direction of the hand-tool for changing a Distance between a free end of the tool and the housing is adjustable. However, if such a tool receiver is not present, it would also be desirable to set a clearance between the free end of the tool and handles for the operator.

It is therefore the object of the present invention to provide a hand machine tool in which a distance between handle parts on a housing of the hand machine tool and a free end of the operated tool with the hand tool machine is adjustable.

To solve the problem is provided in a hand-held machine tool of the type mentioned that the first handle portion and the second handle portion are movably mounted to the setting of a longitudinal distance of their respective handle portion to the longitudinal end of the housing by means of at least one housing bearing on the housing.

A basic idea of the invention is that the handle parts are not fixedly fixed to the housing, but with respect to the housing are adjustable.

Each handle part may be associated with an individual housing bearing, so that the two handle parts are each mounted separately on the housing. But it is also possible that both handle parts by means of a common housing bearing, such as a sliding bearing, are movably mounted on the housing.

In the case of the first and the second handle part, it is possible for it to be respectively rotatably and / or pivotably and / or slidingly moveable and / or pivotally movable on the housing. The housing bearing comprises, for example, a pivot bearing, in particular a pivot bearing, a sliding bearing or a pivoting sliding bearing. A movement path of a sliding bearing or swivel-sliding bearing expediently runs at least substantially in the longitudinal direction of the housing.

The housing bearing is preferably arranged on a transverse side of the housing or on a bearing arm projecting in front of the transverse side.

A respective handle part may also be mounted on the housing with two or more housing bearings and / or a housing bearing may comprise a plurality of part bearings. The partial stocks have e.g. a distance relative to a pivot axis of the housing bearing.

It is advantageous if a handle part is mounted not only with a housing bearing movable relative to the housing, but is also mounted by means of a second bearing on the housing or the second handle part. The two bearings are spaced apart, preferably transversely to one another Swivel axis of the handle part. A preferred variant of the invention provides that at least one handle part with a housing bearing is pivotally mounted on the housing and by means of a second bearing slidably movable on the housing or the second handle part. The second bearing has expediently a distance transversely to a pivot axis of the (first) housing bearing. The second bearing is preferably a sliding bearing, which expediently has a curved slot. A preferred variant provides that both handle parts are mounted in the aforementioned manner to each other or on the housing, that is, by means of a pivot bearing and a sliding bearing.

The second bearing may have a further function in a further embodiment of the invention, namely a housing bearing, e.g. a pivot bearing for which other handle part form or comprise. The second bearing can also be arranged on a housing bearing for the other handle part only. The handle parts are thus mounted by means of common bearings with respect to the housing, so that few components are necessary, at the same time a high stability and mechanical strength is achieved.

Preferably, an arrangement is such that a housing bearing forms a pivot bearing for a handle part and a sliding bearing, expediently a pivot sliding bearing for the other handle part.

An embodiment of the invention may provide that the longitudinal distances of the two handle sections are individually adjustable. The handle parts are not coupled together so that they are individually adjustable.

Another variant provides that the first handle part and the second handle part are motion-coupled via a coupling device. For example, takes the first handle part in an adjustment of its longitudinal distance to the tool holder, the second handle part to change the longitudinal distance with. Also, the reverse arrangement may be provided that the second handle part entrains the first handle part in an adjustment of its longitudinal distance. Preferably, the two handle parts take each other with. But it is also possible that only one handle part entrains the other handle part while blocking an adjusting movement upon actuation of the other handle part. Thus, a longitudinal adjustment is possible only with the operation of a handle part, while the other handle part is always only entrained.

Preferably, the one hand grip part takes with it the other hand grip part in order to adjust the longitudinal distance of the handle parts in the same direction. This means that both handle parts, for example, are moved in the same direction closer to the tool holder or further away from the tool holder.

Expediently, the one hand grip part takes along the other hand grip part in such a way that the longitudinal distance between the two handle parts changes proportionally, preferably to the same extent. Thus, the two handle portions relative to each other always the same longitudinal distance.

The coupling device expediently comprises a coupling bearing coupling the first and the second handle part. The coupling bearing expediently comprises a fixed to a handle part, optionally rotatable bearing projection, a bearing shaft or the like, the or in a Long hole engages the other handle part. It is understood that for coupling the two handle parts and a coupling mechanism may be provided, for example, a toothed gear, a cable transmission, a cam gear or the like.

The coupling bearing is expediently arranged between a first housing bearing supporting the first handle portion on the housing and a second housing bearing supporting the second handle portion on the housing, for example approximately in the transverse center of the housing. The coupling bearing is thus arranged between the two housing bearings with respect to the transverse direction of the housing. The coupling bearing acts stabilizing on the handle assembly.

The coupling bearing is expediently freely movable relative to the housing. Thus, the coupling bearing has no connection to the housing.

A longitudinal distance of the coupling bearing to the tool holder changes with an adjustment of the longitudinal distance of a handle portion advantageously with.

For fixing the first and / or the second handle part, at least one fixing device is preferably provided with which the respective handle part can be fixed and fixed relative to the housing. Then the fixing device is in a fixing position. The fixing device is adjustable by means of an operating handle in a release position, in which one or both handle parts are freely movable to an adjustment of the longitudinal distance of its handle portion to the tool holder.

It should be noted at this point that the free mobility of a respective handle part by a latching device can be limited so to speak. A respective handle part can be latched, for example, in different longitudinal positions with respect to the tool holder with the housing. The housing bearing has, for example, interlocking locking means.

The at least one fixing device is expediently designed to clamp the respective handle part. Thus, the fixing device forms a clamping device. But it is also possible that by fixing a fixation is made, that the fixing device has interlocking toothings or that for fixing a lock, for example by means of a locking projection, locking bolt or the like, is provided.

The at least one fixing device is expediently designed for a simultaneous fixing and releasing of both handle parts by means of the operating handle. It suffices in this embodiment, a single fixing device to fix both handle parts by means of the operating handle. The fixing handle can be, for example, a toggle lever arrangement, a clamping screw, a clamping lever or the like.

The at least one fixing device expediently comprises a fixing bearing, with which a respective handle part is mounted on the other handle part or the housing. This fixing bearing may comprise, for example, one of the aforementioned housing bearings or a coupling bearing coupling the handle parts.

The fixation and a second, the handle part on the other handle part or the housing overlapping bearing are suitably opposite sides of the housing arranged. The second bearing and the fixing bearing can cooperate, for example by means of a bearing pin, which passes through both bearings.

Here, however, the problem arises that this bearing bolt must be passed over the housing or through the housing. Preferably, it is therefore provided that the second bearing does not form part of the fixing device, that is, the fixing device is independent of the second bearing. The fixing device thus acts only on the fixation, over which a simultaneous fixation of both handle parts is possible.

The fixing bearing expediently comprises a sliding bearing, with which the handle part is in particular slidingly movable along a curved path of movement. The respective handle part is expediently mounted pivotably on the housing by means of a housing bearing arranged at a distance from the fixing bearing. Thus, the handle part is fixed on the one hand by the fixing bearing and the other by the housing bearing fixed when the fixing device is in its fixing position.

The at least one fixing device preferably comprises a tie rod passing through the housing. The tie rod may for example be a bearing part of a bearing which supports a handle part on the other handle part or on the housing.

Preferably, at least one handle part, expediently both handle parts, a switch for switching the drive motor is arranged. Thus, the switch is available at the respective operating location, in particular the handle portion.

At least one handle part expediently comprises a swivel arm. The handle part is for example bow-like. A handle part may be in one piece or in several parts. A handle part expediently comprises at least one pipe section.

The handle section is expediently arranged on a section of the pivot arm which is at a distance from the housing. This section expediently runs essentially parallel to a transverse side of the housing and thus forms a transverse section of the pivoting arm.

The handle assembly expediently forms a kind of swivel arm arrangement.

The hand-held power tool is preferably a stirring machine with which building material can be stirred.

Figur 1a

ein erstes Ausführungsbeispiel einer erfindungsgemäßen Hand-Werkzeugmaschine in Vorderansicht, wobei Handgriffpartien einer Handgriffanordnung einen größeren Längsabstand zu einer Werkzeugaufnahme aufweisen als in einer in

Figur 1b

dargestellten unteren Stellung der Handgriffanordnung,

Figur 2a

eine hintere und

Figur 2b

eine vordere Schrägansicht der Hand-Werkzeugmaschine gemäß Figur 1, wobei die Handgriffanordnung in einer mittleren Stellung ist,

Figur 3a

eine Querschnittsansicht eines Ausschnitts D1 von Figur 2a entlang einer Schnittlinie A-A,

Figur 3b

eine Querschnittsansicht der Hand-Werkzeugmaschine gemäß Figur 1b entsprechend einem Ausschnitt D2 entlang einer Schnittlinie A-A,

Figur 4

eine perspektivische Schrägansicht eines zweiten Ausführungsbeispiels einer erfindungsgemäßen Hand-Werkzeugmaschine,

Figur 5

die Hand-Werkzeugmaschine gemäß Figur 4 in Vorderansicht,

Figur 6

eine Querschnittsansicht der Hand-Werkzeugmaschine gemäß Figur 4 entlang einer Schnittlinie B-B in Figur 4,

Figur 7

eine teilweise entlang einer Schnittlinie C-C geschnittene Ansicht der Hand-Werkzeugmaschine gemäß Figur 4

Figur 8

eine perspektivische Schrägansicht von oben und

Figur 9

eine perspektivische Schrägansicht von unten eines dritten Ausführungsbeispiels einer erfindungsgemäßen Hand-Werkzeugmaschine,

Figur 10a

eine Frontalansicht der Hand-Werkzeugmaschine gemäß Figur 8, wobei Handgriffpartien einer Handgriffanordnung einen größeren Längsabstand zu einer Werkzeugaufnahme aufweisen als bei einer in

Figur 10b

dargestellten Frontalansicht der Hand-Werkzeugmaschine.

Hereinafter, an embodiment of the invention will be explained with reference to the drawing. Show it:

FIG. 1a

a first embodiment of a hand-held machine tool according to the invention in front view, wherein handle portions of a handle assembly have a greater longitudinal distance to a tool holder as in an in

FIG. 1b

illustrated lower position of the handle assembly,

FIG. 2a

a rear and

FIG. 2b

a front oblique view of the hand-held machine tool according to FIG. 1 wherein the handle assembly is in a middle position,

FIG. 3a

a cross-sectional view of a section D1 of FIG. 2a along a section line AA,

FIG. 3b

a cross-sectional view of the hand machine tool according to FIG. 1b corresponding to a section D2 along a section line AA,

FIG. 4

3 is an oblique perspective view of a second embodiment of a hand-held machine tool according to the invention,

FIG. 5

the hand machine tool according to FIG. 4 in front view,

FIG. 6

a cross-sectional view of the hand machine tool according to FIG. 4 along a section line BB in FIG. 4 .

FIG. 7

a partially cut along a section line CC view of the hand machine tool according to FIG. 4

FIG. 8

a perspective oblique view from above and

FIG. 9

3 is a bottom perspective view of a third embodiment of a hand-held machine tool according to the invention,

FIG. 10a

a frontal view of the hand machine tool according to FIG. 8 wherein handle portions of a handle assembly have a greater longitudinal distance to a tool holder than in a

FIG. 10b

illustrated frontal view of the hand machine tool.

Hand machine tools 10a, 10b, 10c, for example agitators 11, have housings 12a, 12b, 12c with a longitudinal end region 13 at the bottom when using the hand machine tool 10a, 10b, 10c, on which a tool holder 14 is arranged. The tool receiving device 14 has a tool holder 15 for holding a tool 16, for example a stirring rod 17.

The longitudinal end portion 13, when using the hand machine tool 10a-10c below, is an opposite end portion of the housing 12a-12c at the top so that the end face located there forms a bottom 22 and a top 23 of the housing 12a-12c. Transverse sides of the housing 12a-12c extend between the two aforesaid end faces, which serve as a front side 24 for better distinctness, as a rear side 25 opposite the front side 24 and holding transverse sides 26 arranged opposite one another between the front and rear sides 24, 25. 27, which each retaining areas for holding the hand-held power tool 10a-10c are assigned.

A drive motor 18 in the interior of the housing 12a, 12b, 12c drives the tool receiving device 14 and ultimately the stirring rod 17 held by the latter directly or via a gear mechanism. At a free end 19 of the tool 16 are shown schematically stirring means 20, for example, Rührvorsprünge, for stirring construction material 21 is present.

Alternatively, however, at a free end of a machine tool according to the invention, e.g. Cutting means or milling means, in particular a drill bit or the like, or abrasive or polishing agents, such as a grinding pad or a polishing pad, be provided.

The hand machine tools 10a, 10b, 10c are easily gripped by means of handle assemblies 30a, 30b, 30c. The handle assemblies 30-30c each have two handle portions 31a-31c, 32a-32c, the gripping handle portions 33a-33c, 34a-34c of which are gripped by an operator opposite to transverse sides of the housing 12a-12c, opposite the holding transverse sides 26, respectively , 27. The handle portions 33a-33c, 34a-34c are disposed on opposite lateral sides of the housing 12a-12c. The operator can grasp and securely hold the hand machine tools 10a-10c from two sides of the housing 12a-12c, respectively.

If now the handle portions 33a-34c each have the same longitudinal distance to the longitudinal end portion 13 and thus to the tool holder 15, the operation for operators with different body size would not always be optimal. If the longitudinal distance 28 is suitable for an operator with a certain body size, he is unsuitable for a larger or smaller operator so that he has to bend over during use of the hand-held machine tool 10a-10c or the handle sections 33a-34c are arranged uncomfortably high. Here the invention remedy the following:

The handle portions 31a-32c are not fixed to the housing 12a-12c but are movably supported thereon, the handle portions 31a-31c with housing bearings 35a-35c, the handle portions 32a-32c with housing bearings 36a-36c.

The housing bearings 35a-35c, 36a-36c are arranged on the holding transverse sides 26, 27. The handle portions 33a-33c, 34a-34c are the holding transverse sides 26, 27 opposite and in the present case substantially parallel to these. The handle parts 31a-31c, 32a-32c can be pivoted about the housing bearings 35a-36c designed as pivot bearings, so that the longitudinal spacing 28 of their respective handle portions 33a-34c changes with respect to the longitudinal end region 13. Pivot axes 37, 38 of the housing bearings 35a-35c, 36a-36c also extend substantially parallel to the holding transverse sides 26, 27, so that the parallel course of the handle portions 33a-33c, 34a-34c with respect to the holding transverse sides 26, 27 regardless of the respective pivot position of the handle portion 31a-31c, 32a-32c remains substantially the same.

The handle assemblies 30a-30c can be fixed in their respective longitudinal position or in the respective longitudinal spacing 28 of their handle portions 33a-34c with respect to the longitudinal end region 13 by means of fixing devices 39a-39c. So that the handle assemblies 30a-30c occupy a fixed position relative to the housing 12a-12c in this fixing position and are advantageously mechanically highly loadable, not only is the fixing device 39a-39c correspondingly highly loadable, but also an innovative, self-reinforcing, as it were Storage concept realized in the hand-held machine tools 10a-10c.

One measure of this bearing concept and fixing concept provides, for example, that the fixing devices 39a-39c fix the handle parts 31a-32c away from and at a distance from the housing bearings 35a-36c. The fixing means 39a-39c act on a coupling bearing 40a-40c which holds the handle parts 31a, 32a; 31c-32c coupled with each other. The coupling bearing 40a, 41a is like a second, the handle parts 31a, 32a; 31c-32c coupling coupling bearings 41a-41c of a coupling device 42a-42c between the respective housing bearings 35a, 36a; 35c, 36c. The coupling bearings 40a, 41a; 40c, 41c are disposed on mutually opposite sides of the housing 12a, 12c, namely the front 24 and the back 25, but not fixedly connected to the housing 12a, 12c, but freely movable relative to the housing 12a, 12c.

The handle parts 31a, 32a; 31c, 32c are coupled for movement by means of the coupling devices 42a, 42c, so that the first handle part 31a, 31c carries along the second handle part 32a, 32c in the same direction and advantageously also proportionally with an adjustment of its longitudinal spacing 28. Thus, the handle portions 33a, 34a and 33c, 34c always have the same longitudinal distance 28 to the longitudinal end portion 13 of the housing 12a, 12c and there arranged tool holder 15. The handle parts 31a, 32a; 31c, 32c are mutually motion-coupled, that is, that upon movement of the one handle part, the other handle part is taken and vice versa. The fixing device 39a, 39c acts, so to speak, centrally on the coupling bearing 40a, 40c, in any case between the housing bearings 35a, 36a, 35c, 36c, preferably approximately in the region of a transverse center 43 of the housing 12a, 12c.

The fixing device 39b is arranged approximately in the region of a transverse center 43 of the housing 12b and effective there. '

This arrangement of the fixators 39a-39c has advantages not only in terms of load capacity of the handle assemblies 30a-30c with the fixator 39a-39c fixed, but also enables easy operation. The fixing means 39a-39c are connected by means of a single operating handle 44a-44c between their handle parts 31a-32c with respect to the housing 12a-12c fixed fixing fixing position and a release position adjustable, in which the handle parts 31a-32c with respect to the housing 12a-12c adjustable, in the present case are pivotable.

The handle parts 31a-32c are designed like a bow. Each handle portion 31a-32c has a U-shaped basic structure, wherein the handle portions 33a-34c are formed on a base leg 45. Of the base legs 45 extend in the direction of the housing 12a-12c in the handle parts 31a, 31c; 32a, 32c side legs 46a, 46c, in the handle parts 31b, 32b side legs 46b, 47b. The side legs 46a-46c are pivotally mounted on the housing 12a-12c and thus form pivot arms 48. The side legs 47b of the handle portions 31b, 32b are shorter compared to the side legs 46b, that is, they do not extend completely to the housing 12b.

The base leg 45 forms a transverse section of the respective handle portion 32a, 32c.

It is advantageous if a switch for switching on and off of the respective drive motor are provided on a handle part of a hand-held machine tool according to the invention. Thus, the switch is available, so to speak, at the gripping location for holding the hand-held machine tool. This is realized in the manual machine tools 10a, 10c, for example by a switch 49 in the region of the handle parts 34a-34c. The switch 49 is positioned on the respective underside of the handle portion 34a-34c and preferably designed as a pressure switch in a conventional manner.

The operating handles 44a-44c are advantageously formed by rotary knobs or rotary handles, which are adjusted by an operator be rotationally actuated between the fixing position and the release position.

A housing bearing of a hand-held machine tool according to the invention may be in one or more parts, so that a respective handle part with respect to a movement axis, such as axis of rotation or pivot axis, may be mounted on two spaced-apart bearing components. This is the case, for example, with the manual machine tool 10a:

The housing bearing 35a comprises two spaced-apart part bearings 50, the housing bearing 36a has two spaced-apart part bearings 51. The partial bearings 50, 51 are arranged in the region of transverse edges of the housing 12a. The partial bearings 50, 51 each include a bearing arm 52 which is fixedly connected to the housing 12a or is integral with the housing 12a. The bearing arms 52 are inclined from the housing 12a, as a kind of extensions of the side edges between the transverse sides 26, 27 and the front side 24 and the back 25, which also form transverse sides of the housing 12a. Front, free bearing sides 53 of the bearing arms 52 serve for the pivotable and rotatable mounting of the handle parts 31a, 32a. The bearing arms 52 are configured, for example, as housing protrusions. The bearing sides 53 are presently equipped as flat surfaces, which is optional. The bearing sides 53 expediently run essentially parallel to transverse sides of the housing 12 a, in this case the front side 24 and the rear side 25.

The partial bearings 50, 51 of the housing bearings 35a, 36a form pivot bearings for the handle parts 31a, 32a. Free ends of their pivot arms 48 are penetrated by bearing shafts 54, which are held by the bearing arms 52. The bearing shafts 54 are screwed for example in the bearing arms 52. For example, bearing bores (not visible) are provided at the free ends.

Thus, the handle portions 31a, 31b are pivotally supported not only on one, but on two housing bearings with respect to the housing 12a, wherein the respective part bearings 50, 51 are provided at spaced longitudinal edges of the housing 12a, so that the bearing points are widely spaced and the Handle parts 31a, 32a have an optimal grip on the housing 12a.

The bearing shafts 54 further penetrate arcuate slots 55 of bearing plates 56 provided on the handle portions 31a, 32a. The bearing plates 56 are integral parts of the handle portions 31a, 32a and between the free end of the pivot arms 48 and the base leg 45, expediently arranged approximately in the longitudinal center of the pivot arm 48. The bearing shafts 54 are formed, for example, by screws 57, the head of which is supported by a washer 58 on the respective bearing plate 56. In this way, a support bearing is formed. A respective rotary housing bearing 35a, 36a for a handle part 31a, 32a expediently forms a support bearing or pivoting sliding bearing for the other handle part 32a, 31a. It is understood that to improve the bearing properties between the bearing side 53 and each of the adjacent thereto pivot arm 48, a further washer 59 may be provided.

The coupling bearings 40a, 41a are provided between the housing bearings 35a, 36a on the pivot arms 48, that is approximately in the region of a longitudinal center between the respective free ends of the pivot arms 48 and the bearing plates 56th There are the Swivel arms 48 and side legs 46 plate-like or flat.

In the region of the coupling bearings 40a, 41a, the handle parts 31a, 32a have elongated holes 60, which are penetrated by a bearing pin 61. The bearing pin 61 is supported with its head 62 on the outside of the handle parts 32a, 32b. The bearing pins 61 are secured by lock washers 63, which are the head 62 opposite to the housing 12 a facing inside of the handle parts 31 a, 32 a supported. The head 62 and the lock washer 63 accordingly have a diameter larger than a transverse width of the elongated holes 60.

If a handle portion 31a or 32a is pivoted to change the longitudinal distance 28, the bearing pin 61 can be moved in the longitudinal direction of the slots 60, but not transverse thereto, so that the bearing pin 61 so to speak, the other hand grip portion 32a or 31a forcibly in the sense of enlargement or Reduction of the longitudinal distance 28 entrains.

If the respective desired longitudinal distance 28 is set, the handle parts 31a, 32a can be fixed in this longitudinal position by means of the fixing device 39a, in the present case clamped. On the coupling bearing 40a associated bearing pin 61 a clamping knob 64 is arranged for this purpose, which is firmly connected, for example, with the head 62. When the clamping knob 64 is rotated in the sense of clamping, for example in a clockwise direction, it is supported on the outside of the handle portion 31a and pulls the bearing pin 61 to this outside, with the bearing pin 61 via the lock washer 63 on the inside of the handle portion 32a supported. Thus, the two handle portions 31a, 32a against each other curious; excited. In particular in the area of the fixing device 39a, the pivot arms 48 or handle parts 31a, 32a are flat, so that they lie flat against one another in the fixing position of the fixing device 39a, which is advantageously designed as a clamping device. Thereby, the clamping force or fixing force of the fixing device 39a is very high, although only the coupling bearing 40a is transferred to a fixing position, while the arranged on the opposite side of the housing 25 coupling bearing 41a remains free to move.

It is understood that in a modification, not shown, of the embodiment of the hand-held power tool 10a in the region of the coupling bearing 41a clamping or other pivotal fixing of the handle parts 31a, 32a with each other and / or with respect to the housing 12a would be possible in principle. However, then one-handed operation as in the fixing device 39a is not possible.

The coupling bearing 40a forms a fixing bearing 65a of the fixing device 39a. In the hand machine tool 10c, the coupling bearing 40c forms a fixing bearing 65c. In the hand machine tool 10b, a support bearing 66 supporting the handle parts 31b, 32b with respect to the housing 12b forms a fixing bearing 65b. The support bearing 66 is designed as a sliding bearing, more precisely as a pivoting sliding bearing.

The fixing devices 39a-39c each act on the fixing bearings 65a-65c and allow in their release position in each case a mobility of the fixing 65a-65c, while the fixing bearings 65a, 65c in the fixing position of the fixing device 39a-39c rotatably or pivotally fixed, thus the handle parts 31a-32c are fixed in place with respect to the housings 12a-12c.

In the hand-held power tool 10b, the handle portions 31b, 32b are individually pivotally supported on the housing 12b. Each handle portion 31b, 32b may occupy a different longitudinal distance 28 from the other handle portion 32b, 31b. As a result, the handle assembly 30b is ergonomically optimally adjustable. Nevertheless, the operation is simple, since with the single operating handle 44b by means of a single fixing movement or release movement both handle parts 31b, 32b can be solved or fixed.

The support bearing 66 comprises in front of the front side 24 and the rear side 25 protruding bearing projections, which expediently of a the in FIG. 6 in the interior schematically illustrated housing 12b penetrating bearing shaft 67 are formed. The bearing shaft 67 extends approximately in a transverse center 43 of the housing 12b.

The bearing shaft 67 also penetrates arcuate slots 68 of bearing plates 69 which protrude from the side legs 46b or pivot arms 48 of the handle parts 31b, 32b. The bearing plates 69 extend substantially parallel to transverse sides of the housing 12b, for example, the front side 24 and the back 25. The bearing plates 69 have expediently corresponding to the arcuate slots 68 also has an arcuate outer contour. The bearing plates 69 are arranged on the otherwise circular cylindrical pivot arms 48 and side legs 46b and stand up from these. Thus, the support bearings 66 pivot bearings or pivot guide bearing for the handle parts 31b, 32b.

The bearing shaft 67 forms a tie rod of the fixing bearing 65b. A head 71 of the bearing shaft 67 is supported on the outside of one of the bearing plates 69. On a head 71 opposite longitudinal end of the bearing shaft 67 is the operating handle 44b arranged. The operating handle 44b can be actuated by a rotary actuator. The operating handle 44b is formed by a rotary knob or other rotary control handle, which is screwed onto the bearing shaft 67. The bearing plates 69 are arranged between the housing 12b on the one hand and the head 71 or the fixing device 39b on the other hand. By turning the operating handle 44b, the bearing plates 69 are clamped between the head 71 and the housing 12b and the housing 12b and the operating handle 44b, so that the handle portions 31b, 32b are fixed with respect to the housing 12b. By loosening the operating handle 44b, the fixing device 39b moves into the release position, so that the handle parts 31b, 32b are pivotable with respect to the housing 12b to adjust the longitudinal spacing 28.

It is quite conceivable that the two handle parts 31b, 32b are individually fixable by a respective fixing device. For example, the operating handle 44a could be provided in the aforementioned manner for fixing the handle portion 32b, while the handle portion 31b, a second, in FIG. 7 dashed shown operating handle 44b 'is assigned. The bearing shaft 67 would of course not have to enforce the housing 12b in this embodiment, not shown in detail, so that the interior of the housing 12b for components arranged therein, such as drives, transmissions and the like, is freely available.

It is understood that, instead of the control handles 44b and / or 44b 'designed as clamping screws or clamping screws, for example, a toggle clamp or the like would be possible for clamping the support bearings 66, in particular the bearing plates 69.

A the base legs 45 opposite, preferably parallel to this transverse section 72 of the handle parts 31b, 32b forms a bearing shaft 73 of the housing bearings 35b, 36c. The bearing shaft 73 is pivotally mounted on bearing blocks 74. The bearing shaft 73 penetrates the Lagerbökke 74. The handle parts 31b, 32b are suitably made of a tube material. In any case, the handle parts 31b, 32b, at least where they form the bearing shaft 73, a circular cylindrical shape.

Between a respective pair of bearing blocks 74, a securing piece, for example a securing ring 75, is arranged, whose end faces or longitudinal end sides are supported on the mutually facing inner side of the bearing blocks 74. The securing pieces, in the present case the retaining rings 75, are penetrated by the bearing shafts 73 and fixed at least in the longitudinal direction of the bearing shafts 73 and parallel to the pivot axes 37, 38 fixed to the bearing shafts 73, for example by an adhesive connection or as in the embodiment by a safety pin 76th

In the handle part 32c of the hand machine tool 10c, a similar bearing concept is realized in the case-side mounting as in the hand machine tool 10b. A the base leg 45 opposite transverse portion 80 of the handle portion 32c forms a bearing shaft 81 which is pivotally mounted on two mutually spaced bearing blocks 82. At a distance between the bearing blocks 82, a locking ring or locking member 83 is arranged that is supported with its end faces on the inner sides of the bearing blocks 82 and also slidingly connected to the transverse portion 80 and the bearing shaft 81 is connected.

The handle portion 32c is substantially annular, e.g. O-shaped, that is, in any case, completely closed. The handle portion 32b may be formed by a continuous piece of pipe or from a plurality of composite pipe parts.

The handle part 31c is also formed in the region of the base leg 45 by a tube part whose free ends form part sections 84 of the side legs 46c. The sections 84 are followed by plate sections 85 of the side legs 46c. Between the base leg 45 remote longitudinal ends of the plate portions 85, a bearing shaft 86 is arranged. In the present case, the bearing shaft 86 runs parallel to the base leg 45 of the handle part 31c, wherein, of course, an oblique course is also conceivable. In any case, the bearing shaft 86 is pivotally mounted on one or more bearing blocks 87 of the housing bearing 35c. If a plurality of bearing blocks 87 are provided, a configuration as in the housing bearing 36c, that is arranged with a between the Lagerbökken 87, a longitudinal displacement preventing securing element is appropriate.

It is understood that instead of the retaining rings 83, 75, other longitudinal displacement preventing elements could be provided, e.g. in front of the bearing shaft portions of the handle part 31b, 31c projecting projections or the like.

Longitudinal holes 88 are arranged on the plate sections 85 and are penetrated by bearing shafts 89 of the coupling bearings 40c, 41c. The bearing shafts 89 also penetrate the elongated holes 88, opposite to a longitudinal displacement not to be left bearing recesses, such as holes on the pivot arms 48 of the handle portion 32c. When panning a the handle parts 31c or 32c slide the bearing shafts 89 in the slots 88 along.

In the coupling bearing 41c, the bearing shaft 89 is secured at the end by projections, such as heads, retaining rings or the like, between which the pivot arms 48 of the handle parts 31c, 32c are arranged. When coupling bearing 40c is on the housing 12c facing the longitudinal end of the bearing shaft 89, a locking ring or head projection arranged. The operating handle 44c, for example, a thumbscrew, is screwed onto the other longitudinal end, so that the bearing shaft 89 acts when tightening the operating handle 44c as a tie rod and the handle parts 31c, 32c clamped between the operating handle 44c and arranged at the other end of the bearing shaft 89 head piece become. Then the handle parts 31c, 32c are fixed.

In the manual power tool 10a, in a modification of the invention which is not shown, it is also possible that, for example, at one or both part bearings 50, 51 a fixing device, e.g. includes a clamping screw is provided.

Claims (15)

Hand machine tool, in particular agitator (11) for stirring building material (21), with a by a drive motor (18) drivable, at a Längsendbereich (13) of a housing (12a, 12b, 12c) of the hand-held machine tool (10) Tool holder (15) for receiving and holding a tool (16), in particular a stirring rod (17), with a handle assembly (30a-30c) with a first, a first handle portion (33a-33c) having handle portion (31a-31c) and a second handle portion (32a-32c) having a second handle portion (34a-34c) for gripping by an operator, characterized in that the first handle portion (31a-31c) and the second handle portion (32a-32c) are adapted to adjust a longitudinal distance (Fig. 28) of their respective handle portion (33a-33c, 34a-34c) to the longitudinal end portion (13) of the housing (12a-12c) by means of at least one housing bearing (35a-35c, 36a-36c) movably mounted on the housing (12a-12c) are. Hand machine tool according to claim 1, characterized in that the first handle portion (31a-31c) and / or the second handle portion (32a-32c) are rotatably and / or pivotally and / or slidingly mounted on the housing (12a-12c). Hand machine tool according to claim 1 or 2, characterized in that the first handle part (31a-31c) with a first housing bearing (35a-35c) and the second handle part (32a-32c) with a second housing bearing (36a-36c) is mounted on the housing (12a-12c) and / or that the at least one housing bearing (35a-35c, 36a 36c) is arranged on a transverse side (26, 27) of the housing (12a-12c) or on a bearing arm (52) projecting in front of the transverse side (26, 27). Hand machine tool according to one of the preceding claims, characterized in that at least one handle part (31a-31c, 32a-32c) with a housing bearing (35a-35c, 36a-36c) pivotally mounted on the housing (12a-12c) and by means of a second Bearing movable or Schwenkschiebebeweglich on the housing (12a-12c) or the other handle portion (31a-31c, 32a-32c) is mounted, wherein the second bearing expediently a housing bearing (35a-35c, 36a-36c), in particular a pivot bearing, for the other handle portion (31a-31c, 32a-32c) or advantageously on the housing bearing (35a-35c, 36a-36c) for the other handle portion (31a-31c, 32a-32c) is arranged. Hand machine tool according to one of the preceding claims, characterized in that the first handle part (31a-31c) and the second handle part (32a-32c) are coupled in a coupled manner via a coupling device (42a; 42c), wherein the first handle part (31a-31c) with an adjustment of its longitudinal distance (28) to the longitudinal end region (13) of the housing (12a-12c) the second handle portion (32a-32c) to change the longitudinal distance (28) entrains and / or the second handle portion (32a-32c) at an adjustment of its longitudinal distance (28) to the longitudinal end region (13) of the housing (12a-12c), the first handle portion (31a-31c) to change the longitudinal distance (28) entrains. Hand machine tool according to claim 5, characterized in that the one hand grip part (31a-31c, 32a-32c) the other handle part (31a-31c, 32a-32c) to a same direction and / or synchronous adjustment of the longitudinal distance (28) of the handle parts (33a-33c, 34a-34c) and / or that one handle part (31a-31c, 32a-32c) entrains the other handle part (31a-31c, 32a-32c) so that the longitudinal distance (28) of both handle parts (33a-33c, 34a-34c) proportionally, in particular to the same extent, changes and / or that the coupling device (42a; 42c) at least one coupling bearing (40a.) Coupling the first and second handle parts (31a-31c, 32a-32c) , 41a, 40c, 41c). Hand machine tool according to claim 6, characterized in that the at least one coupling bearing (40a, 41a; 40c, 41c) between a first handle portion (31a-31c) on the housing (12a-12c) superimposed first housing bearing (35a-35c) and a second housing bearing (36a-36c) bearing the second handle part (32a-32c) on the housing (12a-12c), in particular in the region of a transverse center (43) of the housing (12a-12c) is arranged and / or that at least a coupling bearing (40a, 41a, 40c, 41c) with respect to the housing (12a-12c) is freely movable. Hand-held power tool according to one of the preceding claims, characterized in that it has at least one fixing device (39a-39c) for fixedly fixing the first handle part (31a-31c) and / or the second handle part (32a-32c) to the housing (12a). 12c) and / or on the respective other handle part (31a-31c, 32a-32c), wherein the at least one fixing device (39a-39c) of a respective handle part (31a-31c, 32a-32c) fixing fixing position by means of an operating handle ( 44a-44c) is adjustable in a release position, in which the at least one fixing device (39a-39c) the respective handle portion (31a-31c, 32a-32c) for adjusting the longitudinal distance (28) of its handle portion (33a-33c, 34a-34c) to the tool holder (15) releases. Hand machine tool according to claim 8, characterized in that the at least one fixing device (39a-39c) for clamping the respective handle portion (31a-31c, 32a-32c) is configured and / or that the at least one fixing device (39a-39c) for simultaneously fixing and releasing both handle parts (31a-31c, 32a-32c) by means of the operating handle (44a-44c) and / or that the at least one fixing device (39a-39c) comprises a fixing bearing (65a-65c) a respective handle portion (31a-31c, 32a-32c) on the other handle portion (31a-31c, 32a-32c) or the housing (12a-12c) is mounted. Hand machine tool according to claim 9, characterized in that the fixing bearing (65a-65c) and a second, the handle portion (31a-31c, 32a-32c) on the other handle portion (31a-31c, 32a-32c) or the housing (12a 12c-12c) and / or that the fixing bearing (65a-65c) comprises a sliding bearing, with which the respective handle part (31a-31c, 32a-32c) is mounted on opposite sides (24, 25) of the housing (12a-12c). 32c) is in particular slideably mounted along a curved path of movement, and / or that the respective handle part (31a-31c, 32a-32c) is arranged by means of a housing bearing (35a-35c, 36a-36c) spaced from the fixing bearing (65a-65c). is pivotally mounted on the housing (12a-12c). Hand machine tool according to one of claims 8 to 10, characterized in that the at least one fixing device (39a-39c) a the housing (12a-12c) passing through Tie rod (70), wherein the tie rod (70) is preferably a bearing part (54; 67) of a handle portion (31a-31c, 32a-32c) on the other handle portion (31a-31c, 32a-32c) or on the housing (12a -12c) bearing stock (65a-65c) forms. Hand machine tool according to one of the preceding claims, characterized in that on at least one handle part (31a-31c, 32a-32c), in particular its handle portion (33a-33c, 34a-34c), a switch (49) for switching the drive motor ( 18) is arranged and / or that at least one handle part (31a-31c, 32a-32c) at least one pivot arm (48), in particular a pivot bracket comprises. Hand machine tool according to one of the preceding claims, characterized in that the handle portion (33a-33c, 34a-34c) at a portion spaced from the housing, in particular substantially parallel to a transverse side (26, 27) of the housing (12a-12c ) extending transverse portion, the handle portion (31a-31c, 32a-32c) is arranged. Hand machine tool according to one of the preceding claims, characterized in that a pivot axis (37, 38) of the at least one housing bearing (35a-35c, 36a-36c) and the handle portion (33a-33c, 34a-34c) and / or a main - or center portion of the handle portion (33a-33c, 34a-34c) extend at least substantially parallel. Hand machine tool according to one of the preceding claims, characterized in that it is a stirring machine (11) for stirring building material.

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