WO2019206875A1

WO2019206875A1 - Hand-held power tool, in particular a string trimmer or a brush cutter

Info

Publication number: WO2019206875A1
Application number: PCT/EP2019/060320
Authority: WO
Inventors: Attila Nagy; Robert Soltesz; David Gabor Kazup
Original assignee: Robert Bosch Gmbh
Priority date: 2018-04-22
Filing date: 2019-04-23
Publication date: 2019-10-31
Also published as: DE102018206175A1; CN112004405B; CN112004405A

Abstract

The invention relates to a hand-held power tool, preferably a gardening device, in particular a string trimmer (10) or a brush cutter, having a handle unit (12) and a machining unit (38) which are connected together via a spacer unit (32), in particular a spacer unit (32) with a variable length, preferably a telescoping unit (34). According to the invention, the machining unit (38) is arranged in an angled manner, in particular by an angle of 15-75°, preferably 45°, relative to a plane that is defined by an axis (61) which intersects the longitudinal axis (100) of the main tube (22) and is parallel to the rotational axis (60) of the machining unit (38) and by the longitudinal axis (100) of the main tube (22) or the spacing unit (32) at least in a horizontal cutting configuration (58, 400) of the hand-held power tool.

Description

description

title

Hand tool, in particular grass trimmer or brush cutter

State of the art

There are already known hand tool machines according to the preamble of claim 1.

Disclosure of the invention

The invention relates to a hand tool, preferably a garden implement, in particular a grass trimmer or brushcutter, comprising a handle unit and a processing unit, which are connected to each other via a spacer unit, in particular an extendable distance unit, preferably a telescope unit.

It is proposed that the handle unit has two handles whose longitudinal axis alignment is not parallel; and / or that their free handle ends are in particular x- / V-shaped trimmed; and / or that their non-free handle ends are connected by means of a connection unit, in particular a pivot unit, v-shaped. As a result, the ergonomics of the gardening tool can be increased. An additional sometimes bulky wishbone can be omitted. Intuitive operation is possible. In contrast to the parallel Längsachsausrichtung the handles intersect the longitudinal axes of the handles in extension of the free ends of the handles.

The hand tool has a drive, in particular an electric, combustion, pneumatic, hydraulic drive or the like, which directly or indirectly indirectly a tool is driven. The hand tool becomes passed over a handle unit. Due to the ambidextrous guidance a precise processing is possible. Furthermore, the weight of the device can be shifted to both areas, in particular relatively evenly, particularly preferred by the choice of the center of gravity as explained below. Gardening tools may be, for example, grass trimmers or brushcutters, floss switches, stain shears, so-called multi-function tools in which the intent is interchangeable - for example between chainsaw, spot shear, pruning shears - or the like. The processing unit can be driven indirectly or directly. For example, the distance unit may space the drive unit (eg, a motor) from the processing unit (eg, the cutting or trimming head, chainsaws, or stubble shaving head, or the like). The connection is then completed, for example via a power transmission shaft, or alternatively via a hydraulic or pneumatic or the like. Motor and machining unit can also be arranged at a common end of the distance unit. The engine can drive an application tool directly or indirectly, for example via a transmission.

Further, a grass trimmer or brushcutter is proposed, comprising a main tube to which a handle unit is arranged, which has at least one handle, in particular a directly connected to the main tube or at least immediately outgoing handle whose longitudinal axis with the longitudinal axis of the main tube span a handle plane, further comprising a processing unit, which is connected via a distance unit, in particular an extendable distance unit, preferably a telescopic unit, with the handle unit, wherein the processing unit occupies a horizontal section configuration and a longitudinal axis of the main pipe intersecting parallel axis to the axis of rotation of the processing unit and the longitudinal axis of the main pipe or the Spacing unit span a processing unit level. It is proposed that the handle plane is inclined relative to the processing unit plane about the longitudinal axis of the main pipe or the longitudinal axis of the distance unit, in particular by 5-25 °, preferably by 15 °.

It is also proposed that the handle unit has two handles, which are connected via a particular hinged, at least V-shaped alignable connection unit and / or V-shaped pivot unit. This can the hand tool can be easily transferred from a working configuration in a storage or transport configuration and vice versa. The V-shaped pivot unit gives the connection unit or handle unit in the V-orientation high stability. It also serves to accommodate a triggering element. Within the pivot unit stop elements can be arranged. Furthermore, the trigger element can be spring-biased. As a result, a provision of the trigger element can be ensured. Furthermore, the triggering element or a form-fitting element connected thereto can have an oblique surface in order to advantageously clamp the pivoting unit at least in the unfolded position, in particular to clamp it about the pivot axis of the pivoting element or to clamp the handles in a plane of movement.

In addition, it is proposed that the handle unit, connection unit and / or pivot unit have the telescoping unit. In particular, a locking mechanism, for example a form-locking mechanism, for example with a clamping means on the connection unit and / or pivot unit is arranged and / or integrated in this. As a result, the number of components can be reduced, the rigidity can be increased and / or the intuitive use of the handheld power tool can be improved.

It is also proposed that the connecting unit or at least leg of the V-shaped aligning connection unit, at least in an unfolded state, an angle of 45-75 °, in particular of 60 ° include or include and / or that the connection unit in the folded state an angle of <25 °, in particular of 5-25 °, preferably of 15 ° and / or that the handles of the handle unit in the folded state touch only in a region of the free ends of the handles or are closest and / or towards unfree Diverge substantially V-shaped end of the handles, preferably at an opening angle of 45-75 °, in particular of 60 ° and / or that the respective legs of the connecting unit and the longitudinal axes of the handle have an acute-angled orientation, preferably with an opening angle of 45- 85 °, in particular of 60 °. This also improves the ergonomics of the power tool and makes handling more comfortable. Furthermore, it is proposed that a center of gravity of the handheld power tool comes to rest in the region of the at least V-shaped alignable connection unit of the handles, in particular in the region of the pivoting unit and / or along the longitudinal axis of the main tube (22).

In addition, it is proposed that in order to produce a torque equilibrium acting at least essentially about the longitudinal axis of the main pipe, the processing unit is displaced to one side and the second handle or the pivoting unit and / or connecting unit is displaced to the other side of the main pipe. Thus, moments due to the force acting on the processing unit and the second handle, or the pivot unit or connecting unit gravity, because they act opposite to the longitudinal axis of the main tube. This also improves the ergonomics. A user does not have to apply torque or torque to hold the power tool, for example, in a horizontal section configuration.

It is also proposed that the processing unit is arranged angled to a processing unit level, which is spanned at least in a horizontal section configuration by a longitudinal axis of the main pipe intersecting parallel axis to the axis of rotation of the processing unit and the longitudinal axis of the main pipe or the spacer unit, in particular angled at 15- 75 ° , preferably around 45 °.

It is also proposed that there is a parallel offset to the main cutting direction of the cutting head between an angle bisector of the V-shaped handle unit or pivot unit or at least one bisector of the opening angle of the pivot unit projected on the horizontal section plane. Or that at least one bisector of the opening angle projected onto the horizontal section plane defines a main cutting direction axis (main operating direction of movement), the cutting head having a parallel offset to the main cutting direction axis, in particular>VS> times the handle distance or> times a shoulder width of a user, preferably> 100 mm, in particular> 150 mm, particularly preferably> 200 mm, in particular increasing with prolonged telescoping.

drawing

Further advantages emerge from the following description of the drawing. 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:

Fig. 1 A Flandwerkzeugmaschine invention, in the form of a garden implement, here in the form of a grass trimmer or brushcutter, in a front view.

2 shows the trimmer in three views, each in a Horizontalschnittkonfigu- ration,

3 shows the trimmer in three views,

4 shows the trimmer in three arrangements, or in a horizontal section configuration, in an edge trimming configuration and a flat section configuration,

5 shows two views of a pivoting and rotating device in an exploded view,

6 shows an adjusting device for telescoping or flöhenverstellung the grass trimmer in an exploded view,

7 shows a detail from FIG. 6 in different views,

Fig. 8 shows the grass trimmer in a compact storage or transport configuration

Fig. 9 shows an alternative pan, rotary, and height adjustment.

FIG. 1 shows a hand-held power tool in the form of a plant cutting device or a garden implement, here in the form of a grass trimmer 10 or brushcutter. The grass trimmer 10 or brushcutter has a handle unit 12. The Handle unit 12 includes at least a first handle 14. Further, the handle unit 12 includes a second handle 16. The first handle 14 is connected to the second handle 16 via a connection unit 18. The second handle 16 is designed to be displaceable or fold-out to the first handle 14. The second handle 16 can be pivoted about a pivot unit 20 relative to the first handle 14 or relative to a main tube 22. The pivoting angle is an acute angle 24. As a result, the handle unit 12 assumes a V-shaped position, at least in one working position. The pivoting unit 20 constitutes a part of the connecting unit 18 or the handle unit 12. The pivoting unit 20 can be released via the triggering element 26. This can be initiated by a user's folding and / or folding. The handle unit 12 is attached to the main tube 22 or a linkage of the grass trimmer 10. The handle unit 12 may also form part of this main tube 22 or linkage. The second handle 16 is connected via a pipe 28 to the pivot unit 20. The tube 28 represents a part of the handle unit 12 or the connecting unit 18. The main tube 22 and the tube 28 are each at least partially surrounded by connecting or stiffening elements 30. These can be in the respective handles 14, 16 pass over or integrally formed with the handles 14,16. They stiffen the position of the handles 14, 16. They surround at least partially the main tube 22 and the tube 28th

Via a spacer unit 32 or telescopic unit 34, in this case a further tube 36, in particular a tube 36 which can be telescoped relative to the main tube 22, the handle unit 12 is connected to a processing unit 38. The spacer unit 32 connects the handle unit 12 and the processing unit 38 with each other and separates them from each other. The spacer unit 32 is designed to be displaceable relative to the handle unit 12 or the main tube 22. By actuating an adjustment device 40, the distance unit 32 is telescopic. For example, interlocking elements, not shown here (eg latching means), engage in corresponding interlocking elements on the spacer unit 32. These are brought out of or into engagement via the adjusting device 40. Thus, the lawn trimmer 10 or brushcutter can be adapted to different heights and / or positions or stow or transport compact. The processing unit 38 includes a cutting head 42. The cutting head 42 drives at the brushcutter Knife (not shown here), a cutting disc with, for example, movable cutting knives (hybrid brush cutter / trimmer - also not shown here), or the grass trimmer 10 a cutting thread 44 at. Due to the high rotational speed of the cutting filament 44, this is tautened by centrifugal forces and can thereby cut or cut a clippings, especially grass. Alternatively, however, the processing unit 38 may also be a hedge trimmer attachment, a chainsaw attachment, a pruner attachment, a spray attachment or the like. These can optionally be telescopically or with a fixed distance to the handle unit 12 or to the main pipe 22. In the present example, the cutting head 42 comprises a drive unit 46 and a cutting unit 48. The drive unit 46 is formed here by a motor, in particular an electric motor. The cutting unit 48 comprises a coil 50 on which the cutting thread 44 can be sorted or wound up. If the drive unit 46 rotatably drives the spool 50 or the cutting thread 44 projecting out of the spool 50, grass or turf or shrubbery can be cut or trimmed with the cutting thread 44 in a known manner. By means of the spacer unit 32, cuts can be carried out conveniently in the grass trimmer 10 or brushcutter, while the user stands or runs and, for example, pivots the grass trimmer 10 over a lawn; Similarly, work on hedges or trees, then typically with the aforementioned intentions or other appropriate intentions, made. The drive unit 46 is exemplified by a battery (not shown here) supplied with energy. The rechargeable battery is arranged at the end of the main tube 22 spaced from the cutting head 42 on a rechargeable battery receptacle 52, which here serves for the improved distribution of the balance or the improvement of the ergonomics of the grass trimmer 10. The rechargeable battery represents, as it were, a counterweight to the motor or the cutting head 42. As a result, the center of gravity of the grass trimmer can be displaced into the region 53 of the handle unit 12 or into the region of the swiveling unit 20 or the connecting unit 18. In principle, the battery can also be arranged at a different location. To activate the motor, a switch 54, in particular a gas trigger switch can be actuated by a user. Switching and / or control signals and / or the energy transport between handle unit 12 and cutting head 42 take place here by way of example via cables, not shown, which can be routed within the main tube 22 and the spacer unit 32. Of course, the gardening tool have a control or regulation, which takes over the control of the engine based on at least signals from the switch 54 and / or monitors the battery or engine condition and / or the like, controls or regulates. Likewise, in such gardening tools, the motor can also be arranged at a different location, for example at the end of the main pipe 22 spaced from the cutting head 42 (ie in the area of the battery interface 52 shown here). This can supply the cutting head 42, for example via a in the main pipe 22 and the spacer unit 32 and the other tube 36 extending power transmission shaft, with drive energy.

For better clarity and for orientation also in the other drawings, a coordinate system 56 is shown. Based on the cutting head 42 or grass trimmer 10 shown here in its horizontal section configuration 58, the cutting unit 48 or the coil 50 and / or the cutting thread 44 rotate about the axis of rotation 60 or the Y-axis. A horizontal section plane is spanned by the X and Z axes. This is also the plane in which the cutting line 44 rotates. The Z-axis which extends out of the viewing plane of the drawing also defines a main cutting direction 62 for better explanation. This main cutting direction 62 exemplarily defines the straight-out gear of a user of the grass trimmer 10.

FIG. 2 shows the grass trimmer 10 from FIG. 1 in three views a), b), c), respectively in the horizontal section configuration 58. This is for carrying out horizontal cuts, ie cuts substantially parallel to the working surface or plane or the ground intended. In the view a) of the grass trimmer 10 is at least partially shown in a side view. The view b) shows the grass trimmer 10 in a slightly forward tilted front view. The view c) shows the grass trimmer 10 in a plan view. In this view, the coordinate system 56 is also shown analogous to Figure 1, as well as the main cutting direction 62 shown in the z-axis direction. Reference signs are essentially not reassigned for identical parts from FIG. 1, which also applies to the other figures. In addition, however, certain angles, axes, distances and directions are drawn. In principle, it should be noted that in the following longitudinal axes of tubes, handles or similar, substantially elongated components, at least substantially as along the center axis or center axis of the Tubes, handles or similar, extending substantially elongate components to understand. Thus, a longitudinal axis substantially corresponds to the center axis along the main extension direction of the respective component. Along the main tube 22, or along the spacer unit 32, the telescopic unit 34 or the further tube 36, extends a longitudinal axis 100. A longitudinal axis 102 extends along the center axis of the tube 28 to which the second handle 16 is attached. A pivoting angle 80 between the longitudinal axis 100 and a machining plane 82 is approximately 15-65 °, here about 48 °. In other advantageous configurations, it can be 36 ° or 24 °. An angle 84 between the longitudinal axes 100 and 102 of the main tube 22 and the further tube 36 in the view b) is about 45-75 °, in particular about 60 °. Starting from a plane 85 spanned by the Y and Z axes (see view c)), the bisector 87 of the angle 84 comes to lie in a parallel plane 86 to the plane 85. The bisector 87 or parallel plane 86 intersects the pivot unit 20 and the trigger element 26 in the center. The handle unit 12 or pivot unit 20 is aligned in a V-shape. Right and left of the bisector 87 extend the legs (main tube 22 and tube 28) of the V, on which the handles 14, 16 are arranged. In the top view on the right, a user is also depicted with the trimmer 10 or brushcutter in a position that is customary for use. The user's gaze is oriented in Z-axis. The body center of the user is in the region of the parallel plane 86, or the bisector 87 of the handle unit 12. The arrow 88 symbolizes a preferential running direction of the user along a preferential running axis 90. The preferential running axis 90 is aligned parallel to the Z-axis and has an offset 92. The same applies to the parallel plane 86 (in which the bisecting line 87 comes to rest) to the plane 85. The offset 92 is variable depending on a Teleskopierstellung the telescope unit 34. At the telescope unit 34 and the other tube also positive locking elements 94 are used in this view, which serve the locking during telescoping visible. The offset 92 is slightly more than half the shoulder width 96 of a user. This is in other words the offset 92 between the processing unit 38 and the cutting head 42, in particular the axis of rotation 60 of the cutting unit 48 and a center of the handle unit 12 and the pivot unit 20. Thus, a user can walk comfortably along, for example, a wall while the cutting head 42 is displaced to the left. The angle 98 between the parallel plane 86 or the preferential running axis 90 and the at least projected longitudinal axis 100 of the main tube 22 is approximately 45 °. Of course he can also vary.

FIG. 3 shows the grass trimmer 10 in three views a), b), c) with additionally marked handle levels 101, 103 and a plane 104 which can be designated as a handle pivot plane. Reference numerals are essentially not allocated to identical parts from FIG. 1 analogously to FIG. The longitudinal axis 100 of the main tube 22, or the spacer unit 32, and the further tube 36, on which the first handle 14 is arranged; and the longitudinal axis 102 of the tube 28, on which the second handle 16 is arranged, tension the plane 104. Along this level 104 or in an at least parallel plane and the tube 28 is formed pivotable or hinged. It is possible to pivot or fold between a working position and a storage or transport position (see FIG. 8). The swept angle is pointed. In the unfolded state, the angle 84 is approximately 60 °, in the folded state less than 20 °, (according to Figure 8 around 10 °). In principle, additional pivoting or folding angles are conceivable in which the pivoting unit 20 is locked. Thereby, the grip distance of the handles 14, 16 could be adapted to different people, for example, depending on the shoulder width 96 of the user or a comfortable hand position or the like depending on different sensitivities.

A longitudinal axis 106 extending through the first handle 14 and a longitudinal axis 108 extending through the second handle 16 are not arranged normal to the plane 104. So you are not parallel. Rather, the handles 14, 16 with their respective longitudinal axes 106, 108 inclined to the plane 104, in particular each two orthogonal to each other extending longitudinal axes 100, 102, 116, 118 are formed inclined. The longitudinal axes 100, 102 come to rest within the plane 104. On the one hand, the handles 14, 16 about the longitudinal axes 100 and 102 are inclined to each other. The angle of inclination 110 or 112 between the plane 104 and the longitudinal axes 106, 108 of the respective handle 14, 16 is approximately 60 ° -85 °, in particular approximately 75 °. This inclination angle 110, 112 corresponds to an inclination angle about the longitudinal axes 100 and 102. Further the handles 14, 16 are inclined to a normal to the respective longitudinal axis 100, 102 of the main tube 22 and the tube 28 and within the plane 104 extending longitudinal axes 116, 118 (could also be referred to as auxiliary or orientation longitudinal axis). These angles 120, 122 are also each about 60 ° -85 °, in particular about 75 °. Salopp formulated are the handles 14, 16 based on the free handle ends 15, 17 so on the one hand inclined to each other and / (or) on the other hand in the direction of the processing unit 38 or the pivot unit 20 inclined. In other words, the free handle ends 15, 17 are in particular x-shaped / v-shaped and / or the non-free handle ends 19, 21 are connected in a v-shape by means of the connection unit 18, in particular the pivot unit 20. This achieves pleasant ergonomics for the user. As a reader of this patent application or as a game of thought lay your hands about shoulder width or a little closer in the lap or on the thighs. You find that this corresponds to a relaxed orientation of the hands - something like this trimmer lawn 10 or brushcutter gripped. This is precisely the advantage over so-called Kuhhornlenkern, which are held in principle higher and wider and whose handle longitudinal axes are normally aligned parallel to each other. In addition, the handles 14, 16 are typically further spaced at the Kuhhorn handlebar.

FIG. 4 shows the grass trimmer 10 in three arrangements a), b), c). Left (view a)) in the horizontal section configuration 400 (see also Fig. 1, 2 and 3). Center (view b)) in an edge trimming configuration 402. Right (view c)) in a flat cut configuration 404, that is, a configuration in which the space is upwardly limited, for example, to objects such as tables, a porch swing, or the like, To perform horizontal cuts. Reference signs are essentially omitted for identical parts from the previous figures. To achieve the edge trimming configuration, a user or user actuates pedal 612 in the direction of arrow 406, as described in greater detail in FIG. 5, and then typically rotates handle assembly 12 180 ° about longitudinal axis 100 of main tube 22 and spacer 32, respectively, in the direction of arrow 408 , As a result, the handle unit 12 rotates and its handles 14, 16 point to the floor, for example. When the user is now transferred the handle unit 12 in its initial position or use position the processing unit 38 or the cutting head 42 is aligned or oriented such that it can be used for edge cutting - that is, in the edge cutting configuration 402 according to view b). The cutting line 44 can now rotate in a vertically oriented plane. The support wheel 410 or the Schnittdistanzeinheit 412 spaced the coil 50 sufficiently from the ground (not shown here), so that an ideal edge trimming or cutting can be done and the cutting line 44, alternatively the cutting blade (the brush cutter), not on the Dimensions are worn. Thus, a sufficiently free length of the cutting line 44 is ensured to achieve a high cutting thread speed at the end and consequently a high quality of cut. The cutting distance unit 412 and the support wheel 410 also serve to guide and the low-friction rolling over the ground. However, the jockey wheel 410 may also serve in the horizontal cut configuration 400 or flat cut configuration 404 along an edge, wall, or other object (not shown), such as a tree, for ideal cutting distance of the cutting head 42 from the article. This results in less wear, especially the tool used (cutting line 44 or knife brush cutter) and the operation is simplified or more intuitive. The flat-section configuration 404 can also be achieved by operating the pedal 612 and pivoting the main tube 22 or the handle unit 12 relative to the processing unit 38 or the cutting head 42 in the direction of the arrow 416. The main tube 22 and the handle unit 12 thereby come closer to the ground, while the cutting line 44 can still rotate in a horizontal plane. The angle 80, not shown here, between the longitudinal axis 100 of the main tube 22 and the working plane 82 (see also Fig. 2, view a) is approximately 36 ° in the edge cutting configuration 402 and approximately 24 ° in the flat section configuration 404, but may also assume other values , The pedal 612 is pivoted about 20 ° when operating.

Figure 5 shows a pivoting and rotating device 600 in a first view a) and a rear view to b), respectively in an exploded view. The main components shown here are: the housing 602, comprising two housing shells 604 and 606; a spring 608; a coupling 610; a pedal 612 as a trigger element; a hub 614; a connector 616, which may also be referred to as a distance unit connector or end stop; and a securing means 618. The components are arranged substantially along a main axis 620 (pivot axis). In particular, orthogonal to this, another axis 622 (axis of rotation) extends. This further axis 622 in the present case also corresponds to the longitudinal axis 100 of the spacer unit 32. The main axis 620 and the further axis 622 define the rotational degrees of freedom of the pivoting and rotating device 600 and the processing unit 38 relative to the handle unit 12 and the spacer unit 32, respectively provided the processing unit 38 to pivot about the main axis 620 (height adjustment by pivoting, or adjustment of the angle 80 on the edge cutting configuration 402 see Fig. 4, view b) - here about 36 °; or the flat-section configuration 404, while angle 80 is approximately 24 °, cf. Fig. 4 c). Furthermore, at the same time or one after the other, in each case triggered by the common triggering element, namely the foot pedal 612, the processing unit 38 is rotated about the further axis 622 (to achieve edge cutting function edge cutting configuration 402 cf. FIG. 4, view b).

Starting from FIG. 5, view a) and b), a plurality of ribs 626, which run parallel to the main axis 620, are arranged on the first housing shell 604 starting from a wall 624. These ribs 626 correspond to recesses 628 in the coupling 610. They serve to rotationally inhibit the coupling 610 relative to the housing 602; but they allow an axial displacement of the coupling 610 relative to the housing 602. The coupling 610 has inclined surfaces 630, which correspond to inclined surfaces 632 of the pedal 612 or form pairs of inclined surfaces. By operating the pedal 612 in the direction of the arrow 634, the inclined surfaces 632 are rotated over the arm 636 relative to the other inclined surfaces 630 arranged on the coupling 610. As a result, the coupling displaces axially in the direction of the return force of the spring 608 Housing shell 604 or its wall 624.

Teeth 638, in particular teeth 638 of a spline, arranged on the coupling 610 are brought out of engagement with corresponding teeth 640 on the hub 614. Consequently, pivoting of the hub 614 about the major axis and relative to the housing 602 is possible as long as the pairs of teeth 638 and 640 are out of engagement. The gift can be limited, for example, by the contour of the housing opening 642. The hub 614 is rotatable relative to the pedal 612 and the housing shell 606 formed around the main axis 620 (here sliding bearing). For this, the pedal surface 644 contacts the hub surface 646 and the housing surface 648 contacts the hub surface 650 (axially relative to the main axis 620). To facilitate rotation of the processing unit 38, in particular to enable the edge trimming function of the trimmer 10 or brushcutter, the hub 614 is provided to rotatably receive the connector 616 about the axis. The axially displaceable coupling 610 has, in addition to the teeth 638, a bolt 652. The bolt 652 is axially displaceable to the hub 614 guided by the sliding surface 654. It is intended to engage in the recess 656 of the connector to prevent rotation of the connector 616 about the axis 622, optionally in a 0 ° and a 180 ° position. If the pedal 612 displaces the coupling 610 axially against the spring force in the direction of the housing shell 604, both the splines of the teeth 638, 640 of the coupling 610 and hub 614 and the connection of the bolt 652 and the recess 656 are released. As a result, the machining unit can be pivoted and rotated relative to the spacer unit by means of a triggering element (in this case the pedal 612) about two axes (620, 622), in particular two orthogonally extending axes (620, 622). Alternatively, other triggering elements are conceivable. The connector 616 is axially secured in the direction of the further axis 622 against a displacement relative to the hub 614 or relative to the main axis 620 with the securing means 618. The securing means 618 is a snap ring which comes to lie in the groove 658 of the connector 616 and is supported on the surface 660 of the hub 614.

As seen in the lower view c), where the connector 616 can be seen in two (180 ° rotated) and the hub 614 (right) in a detail view, the connector has latching means 662 (here in the form of a longitudinal groove) and recesses 664 (Which are at least partially provided for force and / or positive connection with the spacer unit 32) are on. Furthermore, the connector 616 has two further stop surfaces 666, 668, which correspond to stop surfaces 670 and 672 on the hub 614. As a result, during rotation of the processing unit 38 relative to the distance unit 32 or to the handle unit 12 about the further axis 622 and the longitudinal axis 100, a stop for the 0 ° and the 180 ° position provided, which makes the adjustment intuitive, simple and safer. A locking of the rotating and pivoting mechanism is only possible if the pairs of teeth 638, 640 and the bolt 652 and the recess 656 are in the mutually corresponding orientation. In addition to other possibilities is in principle but also conceivable to provide a further recess, for example in the 90 ° and 270 ° of the connector 616 and / or possibly a frictional connection instead of the spline or bolt to allow an even greater variety of adjustment positions when pivoting and turning the power tool , It is also conceivable that the triggering element triggers, for example via a cable, a linkage, a wedge or the like, the telescopic adjustment of the distance unit. (See Fig. 9). Thus, the height adjustment (distance from the handle unit to the processing unit), the pivoting function and the rotation function could be provided with only one trigger element. This triggering element could for example also be arranged on the handle unit, the spacer unit or the processing unit. Alternatively, it is also conceivable that with only one triggering element acting between the processing unit and the distance unit, the height adjustment along the longitudinal axis of the distance unit (ie the adjustment of the distance between the handle unit and processing unit) are combined with the pivot function and / or the rotation function. It is also conceivable that the pivoting function be combined with the height adjustment function by a common triggering element.

Thus, the processing unit 38 relative to the distance unit 32 by means of a (common) triggering element (here the foot pedal 612, but in principle any other common trigger element) about two axes (namely, the main axis 620 and the further axis 622), in particular two orthogonal to each other Axes, rotatable (to each other) is formed. To realize a height adjustment of the handle unit 12, in particular by means of a pivoting function by the angle 80 of the spacer unit 32 relative to the processing unit 38, (preferably by pivoting about a pivot axis here the further axis 622 transverse to the longitudinal axis 100 of the spacer unit 32 and to realize a Kantenschneidkonfiguration 402 by Twisting the Processing unit 38 relative to the spacer unit 32, in particular about the longitudinal axis 100 of the spacer unit 32. The trigger element (here the foot pedal 612) is provided both a Getriebezahnverrastung (or splines of the teeth 638, 340) and a Bolzenverrastung (of the bolt 652 in the Recess 656) at least to solve, in particular also again to lock.

FIG. 6 shows the grass trimmer 10 or thread cutter with the pivoting unit 20 for the V-shaped alignment of the handle unit 12 and the adjusting device 40 for telescoping or height adjustment in an exploded view. Similar parts of Figure 1 or the other figures are not described again.

FIG. 7 shows a section 500 from FIG. 6 in various views. In view a), the adjusting device 40 and the height adjustment mechanism is shown in a sectional view. The trigger member 502 is spring biased and is displaced by pressure applied thereto in the direction of the arrow 504. As a result, a latching means 506 connected at least to the triggering element 502 lifts from a corresponding positive-fit element 94 on the tube 36. The tube can now be displaced in the direction of the arrow 508 relative to the main tube 22.

View b) of Figure 7, as well as the other views c), d) and e) show components of the pivot unit 20. The main pipe 22, the clamping plates 510, 512 are fixed. On the tube 28, a clamping plate 514 is fixed. They each have a recess through which the common pivot unit rotation axis 518 extends. Furthermore, the clamping plates 510, 512 and the clamping plate 514 have corresponding stop elements 520, 522, each offset by 180 °. These serve as an end stop in the open V-shaped position of the handle unit 12. The trigger element 26 has clamping means 530 which correspond to form-fit elements 524, 526, 528 on the clamping plates 510, 512, 514. As a result, the adjusting device 40 can be locked into two positions by actuation of the spring-biased triggering element 26 (namely once the V-shaped handle, pivot or connection arrangement position according to FIG. 1, for example, or the folded handle, pivoting or connecting device). Ordnungsposition according to Figure 8. It is particularly important, however, that the clamping means - one of which is seen in the enlargement X of the section BB in view d), at its distal end has a phase 532. This causes in the v-shaped open position jamming between the clamping means 530 with corresponding form-locking elements 524, 526, 528 and the stop members 520, 522. As a result, the handle unit 12 and the connecting unit 18, or the pivot unit 20, the game in the taken V-shaped unfolded configuration. The pivotable handle unit 12 is thus mounted as possible in the working position without play, which increases the comfort and safety.

FIG. 8 shows the grass trimmer 10 in a compact storage or transport configuration. The tube 36 is completely inserted relative to the main tube 22. The handle unit 12, or connecting or pivoting unit 18, 20 is folded. The other elements should be self-explanatory in conjunction with the previous figures.

FIG. 9 shows, as already indicated in the description of FIG. 5, an alternative swiveling, turning and height adjusting device 700 in which all three or even a fourth adjustment (additionally the swivel angle of the handle unit 12) is triggered by means of the foot pedal 712. A displacement of the foot pedal 712 causes an axial displacement of the additional clutch 704 along the main axis 720 to the left. Due to the contour 705, there is an axial displacement of the rod 706, so that their form-locking elements 707 are used out of engagement 708 with the tube 736, wherein the tube 736 may be a tube 736 of the spacer unit 32 shown in FIG. The rod 706 can at the same time solve or release an alternative height adjustment mechanism 740 and / or a pivot mechanism, not shown here, of the handle unit 12, for example, from FIG. Now, a rotation of the tube 736 about its longitudinal axis 100, for example, to enable the edge cutting configuration 402 is possible. Further, the height adjustment mechanism 740 is released. In addition, a pivoting of the tube 736 about the main axis 720 is possible because the clutch 710 has been disengaged.

Claims

claims

1. Hand tool, preferably gardening equipment, in particular grass trimmer (10) or brushcutter, comprising a handle unit (12) and a processing unit (38), which via a spacer unit (32), in particular an extendable distance unit (32), preferably a telescopic unit (34) are connected to one another, characterized in that the processing unit (38) is arranged at an angle to a plane which, at least in a horizontal section configuration (58, 400) of the handheld power tool, is parallel to a longitudinal axis (100) of the main pipe (22) ) to the rotation axis (60) of the processing unit (38) and the longitudinal axis (100) of the main tube (22) and the spacer unit (32) is clamped, in particular angled at 15-75 °, preferably by 45 °.

2. Hand tool according to Claim 1, characterized in that for producing an at least substantially around the longitudinal axis (100) of a main tube (22) acting moment equilibrium, the processing unit (38) on the one hand and the handle unit (12) and / or the second handle (16) and / or the connecting unit (18) and / or the pivoting unit (20) are arranged displaced to the other side of the main pipe.

3. Hand tool according to at least one of the preceding claims, characterized in that the handle unit (12) has two handles (14, 16), wherein free handle ends (15, 17) are trimmed each other X- / V-shaped and / or non-free handle ends (114, 115) are connected by means of a connecting unit (18), in particular a pivoting unit (20), V-shaped.

4. Hand tool according to Claim 3, characterized in that the handles (14, 16) via a particular hinged, at least V-shaped alignable connection unit (18) and / or pivot unit (20) are connected.

5. Hand tool according to at least one of the preceding claims, characterized in that the handle unit (12) and / or the connecting unit (18) and / or the pivoting unit (20) have a telescoping unit (35).

6. Hand tool according to claim 3 or 4, characterized in that legs (23, 29) of the at least V-shaped alignable handle unit (12) and / or the connecting unit (18), at least in an unfolded state, an angle (24, 84) of 45-75 °, in particular of 60 °, and / or that the handle unit (12) and / or the connecting unit (18) in the folded state forms an angle (24) of <25 °, in particular 10 °, and / or that the handles (14, 16) of the handle unit (12) in the folded state only in a region of the free ends (15, 17) of the handles (14, 16) touch, and / or are to the non-free end (114, 115) of the handles (14, 16) diverge substantially V-shaped, preferably at an opening angle of 45-75 °, in particular of 60 °, and / or that the respective legs (23, 29) of Handle unit (12) and / or connecting unit (18) and the longitudinal axes (106, 108) of the Handle (14, 16) have an acute-angled alignment with each other, preferably with an opening angle (109) of 45-85 °, in particular of 60 °.

7. Hand tool according to one of the preceding claims,

characterized in that a center of gravity of the power tool in a region (53) of an at least V-shaped aligning connection unit (18) of the handles (12), in particular in the region (53) of the pivot unit (20) and / or along the longitudinal axis of the main tube ( 22) comes to rest.

8. Hand tool according to one of the preceding claims,

characterized in that an angle bisector (87) of a V-shaped handle unit (12) or the pivot unit (20) or at least one on the horizontal section plane or working plane (82) projected bisecting line (87) of the opening winkeis (84) of the pivoting unit ( 20), a parallel offset to the main cutting direction (62) of the cutting head (38), in particular>VS> times the grip distance or>VS> times a shoulder width (96) of a user, preferably> 100 mm, in particular> 150 mm, particularly preferably> 200 mm, in particular increasingly with extension of the tele scopeinheit (34).