Handheld machine tools in the form of lawn mowers or brush cutters

Abstract

The present invention is based on a brush cutter (10) having a gripping unit (12) and a processing unit (38) connected to and spaced apart from each other by a distance unit (32), wherein the distance unit (32) has a central axis or longitudinal axis (100), and wherein the processing unit (38) has a rotation axis (60) about which an application tool, particularly a cutting line (44) or cutting blade, can rotate. It is proposed that, at least in the horizontal cutting configuration (58, 400) of the brush cutter (10) or brush cutter, the central axis or longitudinal axis (100) and the rotation axis (60) are axially offset (93) and / or do not intersect each other. The central axis or longitudinal axis (100) extends at least substantially along the centerline or central axis of the distance unit (32).

Description

[0001] This application is a divisional application of application No. 201980027435.6 (International Application No. PCT / EP2019 / 060325), filed on April 23, 2019, entitled "Handheld Machine Tool in the Form of a Grass Trimmer or Brush Cutter". Technical Field Background Technology

[0002] Handheld machine tools in the form of a lawnmower or brush cutter according to the preamble of claim 1 are already known. Summary of the Invention

[0003] The present invention is a handheld tool in the form of a lawnmower or brush cutter, having a gripping unit and a processing unit connected to and spaced apart from each other by a distance unit, wherein the distance unit has or is pre-defined a central axis or longitudinal axis, and wherein the processing unit has or is pre-defined a rotation axis about which the application tool, especially a cutting line or cutting blade, can rotate.

[0004] It is proposed that, at least in the horizontal cutting configuration of a lawnmower or brush cutter, the central axis or longitudinal axis and the axis of rotation are offset from each other and / or do not intersect. The central axis or longitudinal axis extends at least substantially along the centerline or central axis of the distance unit or main pipe of the lawnmower. Consequently, the cutting head is oriented offset relative to the spacer tube. This achieves that, in the horizontal cutting configuration, the main pipe and / or distance unit are no longer primarily spaced from the cutting head in front of the user, but are also arranged laterally offset relative to the user. The main pipe or distance unit is held approximately transversely to the main cutting or main travel direction. This facilitates cutting along fences, etc. The main travel direction is arranged approximately offset relative to the main movement direction of the cutting head.

[0005] Furthermore, it is proposed that the angle bisector and rotation axis of the V-shaped gripping unit also have axial offset, and / or, the plane unfolded by the vertical line and angle bisector along the Y-axis here has an offset relative to the rotation axis of the cutting tool.

[0006] A brush cutter or lawn mower is proposed, comprising a rotatable cutting tool, particularly a cutting line, cutting disc, or cutting blade. The axis of rotation of the cutting tool defines the Y-axis of a coordinate system, and a horizontal cutting plane perpendicular to the axis of rotation defines the X and Z axes of the coordinate system. The Z-axis defines the main cutting direction of the cutting head or cutting head, or the brush cutter or lawn mower. The brush cutter or lawn mower also has a main pipe on which a gripping unit is arranged. This gripping unit is connected to the cutting head or cutting head via a distance unit, particularly an extendable distance unit, preferably a telescopic unit, which is also integrally constructed with the main pipe. It is proposed that, at least in the horizontal cutting configuration of the brush cutter or lawn mower, the longitudinal axis of the main pipe forms an angle with the plane formed by the Y-axis and Z-axis, particularly 10° to 80°, preferably 30° to 60°, especially preferably 40° to 50°, and most preferably 45°. This achieves the advantages previously described. In principle, the center of gravity is also shifted centrally in front of the body through this configuration and can be conveniently and evenly transferred to the hands, especially with the center of gravity as the starting point, through the two handles, particularly those arranged in a V-shape.

[0007] Furthermore, a lawnmower or brush cutter is proposed, comprising a main pipe on which a gripping unit is arranged, the gripping unit being connected to a mowing head or cutting head via a distance unit, particularly an extendable distance unit, preferably a telescopic unit. It is proposed that, in a horizontal cutting configuration of the lawnmower or brush cutter, the longitudinal axis of the main pipe and / or distance unit projected onto the horizontal cutting plane forms an angle with the main cutting direction of the mowing head or cutting head, or in other words, the main cutting direction of the lawnmower or brush cutter projected onto the horizontal cutting plane, particularly an angle of 10° to 80°, preferably 30° to 60°, and especially preferably 45°. This angle, on the one hand, maintains a good field of vision for the cutting head, and on the other hand, provides sufficient offset of the cutting head relative to the user's walking direction, or the angle bisector of the gripping unit. Thus, the cutting head can extend beyond half the user's shoulder width, thereby enabling convenient cutting along high fences or hedges.

[0008] Furthermore, it is proposed that the gripping unit has a V-shaped arrangement with an opening angle, wherein the angle bisector projected onto the horizontal cutting plane is parallel to the main cutting direction orientation of the cutting head, or at least one angle bisector projected onto the horizontal cutting plane predetermines the main cutting direction axis or the operator's main movement direction. It is proposed that the cutting head has a parallel offset relative to the main cutting direction axis, particularly ≥1 / 2 of the user's grip distance or 1 / 2 of the user's shoulder width, preferably ≥100 mm, particularly ≥150 mm, especially preferably ≥200 mm, with the parallel offset increasing particularly as the telescopic unit's extension length increases. As already shown, this allows for convenient cutting along fences or bushes. The center of gravity can be positioned in the area of ​​the gripping unit's swing unit, which distributes weight evenly across the two handles, or rather, the hands, despite the lawnmower's asymmetrical orientation. This ensures reduced fatigue during operation.

[0009] Furthermore, it is proposed that the cutting head has an angular offset or angular arrangement relative to the plane of the processing unit, particularly an angular offset of 15° to 75°, preferably 45°, or an angle of 15° to 75°, preferably 45°, which, at least in the horizontal cutting configuration of the lawn mower, is expanded by a parallel axis intersecting the longitudinal axis of the main pipe and parallel to the rotation axis (60) of the processing unit and the longitudinal axis of the main pipe or distance unit.

[0010] Furthermore, the present invention is based on a handheld machine tool, preferably a gardening implement, especially a lawnmower or brush cutter, having a gripping unit and a processing unit connected to each other via a distance unit, especially an extendable distance unit, preferably a telescopic unit. It is proposed that the gripping unit has two handles, wherein the free handle ends are X / V shaped toward each other and / or the non-free handle ends are V-shaped connected by means of a connecting unit, especially a swing unit. This improves ergonomics when gripping and using the handheld machine tool.

[0011] It is proposed that the center of gravity of a handheld machine tool is located in the region of the connecting unit, which is at least V-shaped oriented, particularly in the region of the swing unit, and / or along the longitudinal axis of the main body. This makes it possible to achieve an even load distribution on both user arms.

[0012] It is proposed that, in order to establish a torque balance that operates at least substantially around the longitudinal axis of the main body, the machining unit is arranged to be shifted toward one side of the main body, and the gripping unit and / or the second handle and / or the connecting unit and / or the swing unit (20) is arranged to be shifted toward the other side of the main body. This creates a torque balance around the longitudinal axis of the main body. The operator therefore does not need to use force to stabilize the handheld machine tool around the longitudinal axis. Attached Figure Description

[0013] Other advantages arise from the following description of the accompanying drawings. The drawings, description, and claims contain numerous combinations of features. Those skilled in the art can also observe the stated features individually and synthesize them into other meaningful combinations.

[0014] The attached diagram shows:

[0015] Figure 1 A front view shows a handheld machine tool according to the invention in the form of a gardening implement, here in the form of a lawnmower or brush cutter.

[0016] Figure 2 The lawn mower is shown in three views in the horizontal cutting configuration.

[0017] Figure 3 The lawn mower is shown in three views.

[0018] Figure 4 The image shows lawn mowers in three arrangements, specifically in the horizontal cutting configuration, the edge cutting configuration, and the low-profile cutting configuration.

[0019] Figure 5 Two views of the oscillating and rotating mechanisms are shown in their respective exploded diagrams.

[0020] Figure 6 An exploded view shows the adjustment device for the telescopic or height adjustment of a lawnmower.

[0021] Figure 7 Shown in different views Figure 6 a part,

[0022] Figure 8 The image shows a lawn mower in a compact storage or transport configuration.

[0023] Figure 9 Alternative swing, rotation, and height adjustment devices are shown. Detailed Implementation

[0024] Figure 1A handheld tool, in the form of a plant cutter or gardening implement, here in the form of a lawnmower 10 or a brush cutter, is shown. The lawnmower 10 or brush cutter has a gripping unit 12. The gripping unit 12 includes at least one first handle 14. Furthermore, the gripping unit 12 includes a second handle 16. The first handle 14 is connected to the second handle 16 via a connecting unit 18. The second handle 16 is displaceable relative to the first handle 14, or is foldable. The second handle 16 is swung relative to the first handle 14, or relative to the main guide 22, via a swing unit 20. The swing angle is an acute angle 24. Thus, the gripping unit 12 occupies a V-shaped position in at least one working position. The swing unit 20 forms part of the connecting unit 18, or the gripping unit 12. The swing unit 20 is releaseable via a release element 26. The user can thus fold and / or flip it. The gripping unit 12 is fastened to the main guide 22, or linkage, of the lawnmower 10. The gripping unit 12 can also form part of the main tube 22 or the connecting rod. The second handle 16 is connected to the swing unit 20 via a tube 28. The tube 28 forms part of the gripping unit 12 or the connecting unit 18 to some extent. The main tube 22 and the tube 28 are each at least partially surrounded by connecting or reinforcing elements 30. These connecting or reinforcing elements can transition into the corresponding handles 14, 16 or can be integrally constructed with the handles 14, 16. They reinforce the position of the handles 14, 16. They at least partially surround the main tube 22 and the tube 28.

[0025] The gripping unit 12 is connected to the processing unit 38 via a distance unit 32 or a telescopic unit 34, here via another tube 36, particularly a tube 36 that can extend and retract relative to the main tube 22. The distance unit 32 connects the gripping unit 12 and the processing unit 38 to each other and spaces them apart. The distance unit 32 is configured to be displaceable relative to the gripping unit 12, or the main tube 22. The distance unit 32 can extend and retract by manipulating the adjustment device 40. For example, shape-locking elements (e.g., locking devices, not shown here) are engaged in corresponding shape-locking elements on the distance unit 32. They are disengaged or engaged by the adjustment device 40. In this way, the brush cutter 10 or the brush trimmer can be adapted to different operating heights and / or operating postures or be compactly stored or transported. The processing unit 38 includes a cutting head 42. The cutting head 42 drives the blades (not shown here) in the case of a brush cutter, a cutting disc with movable cutting blades (hybrid brush cutter / lawn trimmer – also not shown here), or the cutting wire 44 in the case of a lawn trimmer 10. Due to the high rotational speed of the cutting wire 44, the cutting wire is taut by centrifugal force and thus can cut or break the material, especially grass. Alternatively, the processing unit 38 can also be a hedge trimmer attachment, chainsaw attachment, pruning shears attachment, spray attachment, etc. The processing unit can optionally be configured to be telescopic or configured to have a fixed distance to the gripping unit 12 or the main pipe 22. The cutting head 42 in the present example includes a drive unit 46 and a cutting unit 48. The drive unit 46 here is formed by a motor, especially an electric motor. The cutting unit 48 includes a spool 50 on which the cutting wire 44 can be arranged or wound. If the drive unit 46 rotatably drives the spool 50, or the cutting wire 44 extending from the spool 50, then grass or lawn can be cut or trimmed in a known manner using the cutting wire 44, or shrubs can also be cut or trimmed. Cutting can be conveniently performed in the case of a lawnmower 10 or brush cutter using the distance unit 32, while the user stands or walks and, for example, swings the lawnmower 10 across the lawn surface; similarly, it can typically be performed on hedges or trees using the aforementioned attachments or other corresponding attachments. The drive unit 46 is exemplarily powered by a battery (not shown here). The battery is arranged in a battery housing 52 at the end of the main pipe 22 spaced apart from the cutting head 42, which here serves to improve the balance distribution of the lawnmower 10 or to improve the ergonomic design of the lawnmower 10. The battery can be said to constitute a counterweight for the motor or the cutting head 42. Thus, the center of gravity of the lawnmower can be shifted to the area 53 of the gripping unit 12 or the area of ​​the swing unit 20 or the connecting unit 18. However, in principle, the battery can also be placed in other locations. To activate the motor, the user can operate switch 54, especially the throttle switch.The transmission of switching signals and / or control signals and / or energy between the gripping unit 12 and the cutting head 42 can, exemplarily, be accomplished here via a cable (not shown) laid within the main pipe 22 and the distance unit 32. Of course, the gardening appliance can have a controller or regulator that, at least based on the signal from the switch 54, controls or regulates the motor, and / or monitors, controls, or regulates the battery state or motor state and / or similarly. In the case of such a gardening appliance, the motor can also be located in other locations, such as at the end of the main pipe 22 spaced apart from the cutting head 42 (i.e., in the area of ​​the battery interface 52 shown here). The motor can, for example, supply driving energy to the cutting head 42 via a force transmission shaft extending in the main pipe 22, the distance unit 32, and another pipe 36.

[0026] For better clarity and also for orientation in other figures, a coordinate system 56 is depicted. Referring here to the cutting head 42, or lawnmower 10, in the horizontal cutting configuration 58, the cutting unit 48, or spool 50, and / or cutting line 44 rotate about the axis of rotation 60, or the Y-axis. The horizontal cutting plane is unfolded by the X-axis and Z-axis. Here, this is also the plane in which the cutting line 44 rotates. For better illustration, the Z-axis, extending from the viewing plane of the figures, also defines the main cutting direction 62. This main cutting direction 62 schematically defines the forward gait (Gerade-Aus-Gang) of the user of the lawnmower 10.

[0027] Figure 2 The images from the horizontal cut configuration 58 are shown in three views a), b), and c), respectively. Figure 1 The lawn mower 10. A horizontal cutting configuration is set for performing horizontal cuts, i.e., cuts substantially parallel to the work surface, or work plane, or ground. The lawn mower 10 is shown at least partially in a side view in view a). View b) shows the lawn mower 10 in a slightly forward-tilted front view. View c) shows the lawn mower 10 in a top view. A similar configuration is also presented in view c). Figure 1 The coordinate system is 56, and the main cutting direction 62 in the z-axis direction is presented. For... Figure 1Most of the same parts are not re-labeled with reference numerals, and the same is true for other figures. However, certain angles, axes, spacings, and directions are also drawn supplementarily. It should be noted in principle that, in the following text, the longitudinal axis of a substantially slender member such as a tube or handle should be understood as extending along the central axis or midline of the substantially slender member. Thus, the longitudinal axis substantially corresponds to the central axis along the main extension direction of the respective member. The longitudinal axis 100 extends along the main tube 22, or along the distance unit 32, the telescopic unit 34, or another tube 36. The longitudinal axis 102 extends along the central axis of tube 28, to which the second handle 16 is secured. The swing angle 80 between the longitudinal axis 100 and the machining plane 82 is approximately 15° to 65°, here approximately 48°. In other advantageous configurations, it can be 36° or 24°. In view b), the angle 84 between the longitudinal axes 100 and 102 of the main tube 22 and the other tube 36 is approximately 45° to 75°, especially approximately 60°. Starting from plane 85, which is formed by the Y-axis and Z-axis (see view c), the angle bisector 87 of angle 84 lies in a parallel plane 86 parallel to plane 85. The angle bisector 87, or parallel plane 86, intersects the swing unit 20 and release element 26 centrally. The gripping unit 12, or swing unit 20, is oriented in a V-shape. The two legs of the V (main tube 22 and tube 28) extend to the right and left of the angle bisector 87, with handles 14, 16 arranged on said legs. In the top view on the right, a user of the brush cutter 10, or brush trimmer, is also depicted in its usual position. The user's line of sight is directed along the Z-axis. The user's midsection lies within the region of the parallel plane 86, or the angle bisector 87 of the gripping unit 12. Arrow 88 symbolizes the user's preferred forward direction along the preferred forward axis 90. The preferred forward axis 90 is oriented parallel to the Z-axis and has an offset of 92. The same applies to parallel plane 86, which is parallel to plane 85, and angle bisector 87 also lies within parallel plane 86. Offset 92 is variable depending on the telescopic position of telescopic unit 34. In this view, the shape-locking element 94, which acts as a locking part during telescopic movement, can also be seen on telescopic unit 34, or another tube. Offset 92 is slightly greater than half the user's shoulder width 96. In other words, this is the offset between the rotation axis 60 of processing unit 38, or cutting head 42, especially cutting unit 48, and the center of gripping unit 12, or swinging unit 20. In this way, the user can, for example, conveniently travel straight along a wall while the cutting head 42 is shifted to the left. The angle 98 between parallel plane 86, or the primary forward axis 90, and the longitudinal axis 100 projected from the main tube 22 is approximately 45°. It can, of course, also vary.

[0028] Figure 3The lawn mower 10 is shown in three views a), b), and c), with additionally drawn handle planes 101 and 103 and a plane 104 that can also be referred to as the handle swing plane. Similar to... Figure 2 Regarding Figure 1 The same components are generally not labeled with reference numerals. The longitudinal axis 100 of the main tube 22, or distance unit 32, or another tube 36, where the first handle 14 is arranged, and the longitudinal axis 102 of the tube 28, where the second handle 16 is arranged, unfolds onto a plane 104. The tube 28 is also configured to swing or flip along the plane 104 or in a plane at least parallel to it. The tube 28 is capable of swinging or flipping between a working position and a storage or transport position (see [reference needed]). Figure 8 The angle swept here is an acute angle. Angle 84 is approximately 60° in the flipped-up state and less than 20° in the closed state (according to...). Figure 8 (Approximately 10°). In principle, an additional swing angle or flip angle can also be envisioned, and the swing unit 20 is locked at the additional swing angle or flip angle. This allows the grip spacing of the handles 14 and 16 to be adapted to different people, such as according to the user's shoulder width 96 or according to different hand positions that are convenient for different mindsets.

[0029] The longitudinal axis 106 extending through the first handle 14 and the longitudinal axis 108 extending through the second handle 16 are arranged not to be normals to the plane 104. Therefore, they are not parallel. The handles 14 and 16 are constructed at an angle relative to the plane 104 with their respective longitudinal axes 106 and 108, particularly about two mutually orthogonal longitudinal axes 100, 102, 116, and 118. The longitudinal axes 100 and 102 lie within the plane 104. On the one hand, the handles 14 and 16 are inclined towards each other about the longitudinal axes 100 and 102. The angles of inclination 110 and 112 between the plane 104 and the respective longitudinal axes 106 and 108 of the handles 14 and 16 are approximately 60° to 85°, particularly approximately 75°. These angles of inclination 110 and 112 correspond to the angles of inclination about the longitudinal axes 100 and 102. Furthermore, handles 14 and 16 are tilted about longitudinal axes 116 and 118—which may also be referred to as auxiliary or directional longitudinal axes—that are normal to the respective longitudinal axes 100 and 102 of the main pipes 22 and 28 and extend within the plane 104. Angles 120 and 122 are also approximately 60° to 85°, particularly approximately 75°. Loosely speaking, handles 14 and 16 are tilted towards each other and / or towards the processing unit 38 or the swing unit 20, respectively, with respect to their free handle ends 15 and 17. In other words, the free handle ends 15 and 17 are particularly X / V shaped towards each other, and / or the non-free handle ends 19 and 21 are V-shaped connected by means of the connecting unit 18, particularly the swing unit 20. This achieves an ergonomic design that is convenient for the user. Imagine, as a reader of this patent application, placing your hands, for example, shoulder-width apart, or more closely in your lap or on your thighs. You'll find that this corresponds to a relaxed hand orientation—that's how a lawnmower 10 or brush cutter is held. This is precisely the advantage over so-called horn-handled grips, which are in principle held higher and wider, and whose handle axes are typically oriented parallel to each other. Furthermore, in the case of horn-handled grips, handles 14 and 16 are typically spaced further apart.

[0030] Figure 4 The mower 10 is shown in three arrangements a), b), and c). The left side (view a) is in the horizontal cutting configuration 400 (see also view a). Figure 1 , Figure 2 and Figure 3 The middle view (b) shows the edge-cutting configuration 402. The right view (c) shows the low-profile cutting configuration 404, a configuration where space is limited upwards or height, allowing horizontal cutting to be performed, for example, under objects such as tables or Hollywood swings. Parts identical to those in the previous figures are generally not labeled. To achieve the edge-cutting configuration, the user manipulates the device in the direction of arrow 406. Figure 5 The pedal 612 is described in detail below, and then typically the gripping unit 12 is rotated 180° about the longitudinal axis 100 of the main tube 22, or distance unit 32, in the direction of arrow 408. The gripping unit 12 rotates thus, and its handles 14, 16 point, for example, towards the ground. If the user now returns the gripping unit 12 to its initial or usage position, the processing unit 38, or cutting head 42, is oriented or directed such that it can be used for edge cutting—in other words, in the edge cutting configuration 402 according to view b). The cutting line 44 is now able to rotate in a vertically oriented plane. The support wheel 410, or cutting distance unit 412, spaces the spool 50 sufficiently far from the ground (not shown here) to achieve ideal edge trimming or cutting and to prevent excessive wear of the cutting line 44, or, in the case of a brush cutter. This also ensures sufficient free length of the cutting line 44 to achieve high cutting line speeds at its ends and thus ensures high cutting quality. The cutting distance unit 412, or support wheel 410, is also used for guiding and low-friction rolling on the ground. However, the support wheel 410 can also be used in the horizontal cutting configuration 400 or the low-profile cutting configuration 404 along edges, walls, or other objects such as trees (not shown here) to maintain an ideal cutting distance between the cutting head 42 and the object. As a result, wear on the tools used (cutting line 44 or, in the case of a brush cutter) is reduced, and operation is simplified or becomes more intuitive. The low-profile cutting configuration 404 can also be achieved by operating the pedal 612 and swinging the main pipe 22, or gripping unit 12, relative to the processing unit 38, or cutting head 42, in the direction of arrow 416. The main pipe 22 and gripping unit 12 are thus brought closer to the ground, and the cutting line 44 can rotate in the horizontal plane as before. The angle 80 between the longitudinal axis 100 of the main pipe 22 and the processing plane 82 (not shown here) Figure 2 View a) shows an angle of approximately 36° in the edge-cut configuration 402 and approximately 24° in the low-profile-cut configuration 404, however other values ​​are also possible. The pedal 612 swings approximately 20° during operation.

[0031] Figure 5The oscillating and rotating device 600 is shown in exploded views in the first view (a) and the rear view (b) for the same purpose. The main components shown here are: a housing 602 with two outer shells 604 and 606; a spring 608; a clutch 610; a pedal 612 as a release element; a hub 614; a connector 616, which can also be referred to as a distance unit connector or end stop; and a locking device 618. These components are arranged substantially along the main axis 620 (oscillation axis). Another axis 622 (rotation axis) extends particularly orthogonally to the main axis 620. This other axis 622 also corresponds to the longitudinal axis of the distance unit 32 in the present case. The main axis 620 and the other axis 622 define the rotational degrees of freedom of the oscillating and rotating device 600, or processing unit 38, relative to the gripping unit 12, or distance unit 32. The processing unit 38 is configured to oscillate about the main axis 620 (height adaptation is achieved through oscillation, or the angle 80 is adjusted to see [reference]). Figure 4 View b) shows the edge-cut configuration 402—here approximately 36°; or the low-profile cut configuration 404, where the angle 80 is approximately 24°, see [reference needed]. Figure 4 c)). Furthermore, simultaneously or sequentially, in any case, a common release element, namely the foot pedal 612, is used to release the machining unit 38 about another axis 622 (for achieving the edge cutting function, see...). Figure 4 View b) Edge cutting configuration 402).

[0032] from Figure 5 Starting from views a) and b), a plurality of ribs 626 are arranged on the first housing 604, parallel to the main axis 620, originating from wall 624. These ribs 626 correspond to slots 628 in the clutch 610. They prevent rotation of the clutch 610 relative to the housing 602; however, they allow axial movement of the clutch 610 relative to the housing 602. The clutch 610 has a ramp 630 corresponding to or forming a ramp with respect to the ramp 632 of the pedal 612. By actuating the pedal 612 in the direction of arrow 634, the ramp 632 is twisted relative to another ramp 630 arranged on the clutch 610 via arm 636. As a result, the clutch is axially displaced toward the housing 604, or its wall 624, against the restoring force or pretension force of the spring 608.

[0033] The teeth 638 arranged on the clutch 610, especially the teeth 638 of the interlocking portion, disengage from the corresponding teeth 640 on the hub 614. Thus, as long as the teeth 638 and 640 are disengaged, the hub 614 can swing about the main axis and relative to the housing 602. This swing can be limited, for example, by the contour of the housing opening 642. The hub 614 is configured to be able to rotate (here: a sliding bearing) about the main axis 620 relative to the pedal 612 and the housing 606. For this purpose, the pedal surface 644 contacts the hub surface 646, and the housing surface 648 contacts the hub surface 650 (axially about the main axis 620). To enable the rotation of the processing unit 38, especially to enable the edge-cutting function in the case of the lawnmower 10 or brush cutter, the hub 614 is provided to accommodate the connector 616 in a manner that allows it to rotate about the axis. In addition to the teeth 638, the axially displaceable clutch 610 also has a pin 652. The pin 652 is guided axially relative to the hub 614 via its sliding surface 654. The pin 652 is positioned in a slot 656 for engagement with the connector to prevent the connector 616 from twisting about axis 622, selectively in 0° and 180° positions. If the pedal 612 displaces the clutch 610 axially against the spring force toward the housing 604, the engagement of the teeth 638, 640 of the clutch 610 and hub 614, as well as the connection between the pin 652 and the slot 656, is cancelled. Thus, the processing unit can swing and twist relative to the distance unit about two axes (620, 622), particularly two orthogonal axes (620, 622), by means of a release element (here: pedal 612). Alternatively, other release elements are conceivable. The connector 616 is locked axially along the other axis 622 by means of a locking device 618 to prevent displacement relative to the hub 614, or relative to the main axis 620. The locking device 618 is a retaining ring, which is located in the channel 658 of the connector 616 and supported on the surface 660 of the hub 614.

[0034] As can be seen in view c) below—in which connector 616 is visible in two (rotated 180°) detailed views and hub 614 (right side) is visible in one detailed view—the connector has locking devices 662 (in the form of a longitudinal channel) and slots 664, which are at least partially configured for force-locking and / or form-locking connection with distance unit 32. Furthermore, connector 616 has two additional stop surfaces 666, 668 corresponding to stop surfaces 670 and 672 on hub 614. Thus, stops are provided for 0° and 180° positions when machining unit 38 is twisted relative to distance unit 32, or gripping unit 12, about another axis 622, or longitudinal axis 100, making adjustment intuitive, simple, and more reliable. Locking of the rotation and oscillation mechanism is only possible when the teeth 638, 640 and pins 652 and slots 656 are in their respective orientations. However, among other possibilities, it is also conceivable in principle to provide a friction-locking connection, for example, by setting additional notches and / or alternative mating engagements or pins in the 90° and 270° of connector 616, in order to achieve a greater number of adjustment positions when swinging and rotating the handheld machine tool. It is also conceivable that release elements could be used, for example, via cable feeders, linkages, wedges, etc., or via the telescopic adjustment of the distance unit (see [reference needed] for this). Figure 9 This allows for the provision of height adjustment (distance from the gripping unit to the machining unit), oscillation, and rotation functions using only a single release element. This release element could, for example, be located on the gripping unit, the distance unit, or the machining unit. Alternatively, it is conceivable, however, to combine height adjustment along the longitudinal axis of the distance unit (i.e., adjustment of the distance between the gripping unit and the machining unit) with oscillation and / or rotation functions using only a single release element that operates between the machining unit and the distance unit. Similarly, it is conceivable to combine oscillation and height adjustment functions using a common release element.

[0035] Therefore, the processing unit 38 can be twisted relative to the distance unit 32 by means of a (common) release element (here, the foot pedal 612; but in principle, any other common release element could also be used) about two axes (i.e., the main axis 620 and the other axis 622), especially two axes that are orthogonal to each other (relative to each other). In order to achieve the height adjustment of the gripping unit 12 by means of the swinging function of the distance unit 32 relative to the processing unit 38 at an angle of 80 degrees—preferably by swinging about a swing axis 100 transverse to the distance unit 32, here the main axis 620—and in order to achieve the edge cutting configuration 402 by means of the twisting of the processing unit 38 relative to the distance unit 32, especially about the longitudinal axis 100 of the distance unit 32, the release element (here, the foot pedal 612) is provided for at least releasing the drive gear lock (or the insertion engagement of the teeth 638, 340) and the pin lock (the pin 652 in the slot 656), and also for relocking them.

[0036] Figure 6 The image shows an exploded view of a lawnmower 10 or wire cutter having a V-shaped oscillating unit 20 for gripping unit 12 and an adjustment device 40 for telescopic or height adjustment. No further description is provided. Figure 1 Or other parts that are the same as those in the attached drawings.

[0037] Figure 7 Shown in different views Figure 6 Part 500. In view a), the adjusting device 40, or height adjusting mechanism, is presented in sectional view. The release element 502 is pre-tensioned by a spring and displaced in the direction of arrow 504 due to the pressure applied thereto. As a result, at least the locking device 506 connected to the release element 502 is lifted from the corresponding shape-locking element 94 on the tube 36. The tube is now able to move relative to the main tube 22 in the direction of arrow 508.

[0038] Figure 7 Views b) and c), d), and e) show the components of the swing unit 20. Clamping plates 510 and 512 are fixed to the main tube 22. Clamping plate 514 is fixed to the tube 28. They each have slots through which the common swing unit rotation axis 518 passes. Furthermore, clamping plates 510, 512, and 514 have corresponding stop elements 520 and 522, respectively staggered by 180°. These stop elements function as end stops in the open V-shaped position of the gripping unit 12. The release element 26 has a clamping device 530 corresponding to shape-locking elements 524, 526, and 528 on the clamping plates 510, 512, and 514. Thus, the adjusting device 40 can be locked in two positions by manipulating the spring-pretensioned release element 26, i.e., according to, for example… Figure 1 The V-shaped handle, swing or connection arrangement position or according to Figure 8 The handle, swing, or connection arrangement is arranged in a flip-up position. However, a special feature is that the clamping device—one of which can be seen in the enlarged portion X of section BB in view d)—has a stage 532 at its distal end. This results in clamping between the clamping device 530 and the stop elements 520, 522, which have corresponding shaped locking elements 524, 526, 528, in the V-shaped open position. Thus, the gripping unit 12, or connecting unit 18, or swinging unit 20, occupies a gap in the V-shaped flip-up configuration. The swingable gripping unit 12 is therefore supported as close to gapless as possible in the working position, which improves convenience and safety.

[0039] Figure 8 The image shows a lawnmower 10 in a compact storage or transport configuration. The tube 36 is fully pushed in relative to the main tube 22. The gripping unit 12, connecting unit 18, and swing unit 20 are folded in. Other components are self-evident in conjunction with the preceding figures.

[0040] As in Figure 5 As indicated in the description, Figure 9 An alternative oscillation, rotation, and height adjustment device 700 is shown, wherein all three or even a fourth adjustment (additionally, the oscillation angle of the gripping unit 12) is triggered by means of a foot pedal 712. Displacement of the foot pedal 712 causes an additional clutch 704 to axially shift to the left along the main axis 720. Axial displacement of the lever 706 is caused by the profile 705, causing its shape-locking element 707 to disengage from the tube 736 at engagement 708, wherein the tube 736 can simultaneously be adjusted according to… Figure 1 The distance unit 32's tube 736. The lever 706 can also be released or disengaged from the alternative height adjustment mechanism 740 and / or, for example, from (not shown here) a mechanism from (e.g., from) Figure 1 The gripping unit 12 has a swing mechanism. It is now possible that the tube 736 rotates about its longitudinal axis 100, for example, to achieve the edge-cutting configuration 402. Furthermore, the height adjustment mechanism 740 is released. It is also possible that the tube 736 swings about the main axis 720 because the clutch 710 has disengaged.

Claims

1. A handheld tool in the form of a handheld lawn mower (10) or a handheld brush cutter, comprising a gripping unit (12) and a processing unit (38), the gripping unit and the processing unit being connected to and spaced apart from each other by a distance unit (32), wherein, The gripping unit (12) includes at least one first handle (14) and a second handle (16), the first handle (14) and the second handle (16) being movable relative to each other via a swinging unit (20), wherein the distance unit (32) has a central axis or longitudinal axis (100), and wherein the processing unit (38) has a rotation axis (60) about which the application tool is rotatable, characterized in that the first handle (14) of the gripping unit (12) is arranged on the main pipe (22) of the lawn mower (10) or brush cutter and the longitudinal axis (106) of the first handle (14) intersects the longitudinal axis (100) of the main pipe (22), the second handle being arranged on the main pipe (22) of the brush cutter (10) or brush cutter. Placed on the tube (28), in at least one working position, the tube (28) and the main tube (22) occupy a V-shaped position, the longitudinal axis (100) of the main tube (22) and the longitudinal axis (102) of the tube (28) unfold into a plane (104), wherein the intersection angle (120) of the longitudinal axis (100) of the main tube (22) and the longitudinal axis (106) of the first handle (14) facing the processing unit (38) is 60° to 85°, the longitudinal axis (108) of the second handle (16) is inclined relative to the plane (104), and the first handle (14) and the second handle (16) are inclined towards each other in an X-shape about their free handle ends and towards the processing unit (38) on the other hand.

2. The handheld machine tool according to claim 1, characterized in that, At least in the horizontal cutting configuration (58, 400) of the lawn mower (10) or brush cutter, the central axis or longitudinal axis (100) and the rotation axis (60) are offset (93) from each other and / or do not intersect each other.

3. The handheld machine tool according to claim 2, characterized in that, In order to establish a torque balance acting around the longitudinal axis (100) of the main body (22), the processing unit (38) is arranged to be shifted toward one side of the main body, and the second handle (16) of the gripping unit (12) is arranged to be shifted toward the other side of the main body.

4. The handheld machine tool according to any one of claims 1 to 3, characterized in that, The processing unit (38) is arranged at an angle to the processing unit plane (85), which is at least in the horizontal cutting configuration (58) of the brush cutter (10) or the main pipe (22) or the distance unit (32) and a parallel axis that intersects the longitudinal axis (100) of the main pipe (22) and is parallel to the rotation axis (60) of the processing unit (38). The second handle (16) is arranged opposite to the processing unit (38) with respect to the processing unit plane.

5. The handheld machine tool according to claim 4, characterized in that, The processing unit (38) forms an angle (98) of 15° to 75° with the processing unit plane (85).

6. The handheld machine tool according to any one of claims 1 to 3, characterized in that, The application tool is a cutting line (44) or a cutting tool; The angle (120) between the longitudinal axis (100) of the main tube (22) and the longitudinal axis (106) of the first handle (14) facing the processing unit (38) is 75°.

7. The handheld machine tool according to any one of claims 1 to 3, characterized in that, The second handle (16) can swing via the swing unit (20).

8. The handheld machine tool according to claim 4, characterized in that, The processing unit (38) forms a 45° angle (98) with the processing unit plane (85).

9. The handheld machine tool according to any one of claims 1 to 3, characterized in that, The center of gravity of the handheld machine tool is located in the region (53) of the swing unit (20) of the first handle (14) and the second handle (16) and / or along the longitudinal axis of the main tube (22).

10. The handheld machine tool according to claim 1 or 2, characterized in that, In order to establish a torque balance acting around the longitudinal axis (100) of the main pipe (22), the processing unit (38) is arranged to be shifted toward one side of the processing unit plane (85), which is at least in the horizontal cutting configuration (58) of the lawn mower (10) or the distance unit (32) by the longitudinal axis (100) of the main pipe (22) or the parallel axis intersecting the longitudinal axis (100) of the main pipe (22) and parallel to the rotation axis (60) of the processing unit (38), and the gripping unit (12) and / or the second handle (16) and / or the connecting unit (18) and / or the swing unit (20) are arranged to be shifted toward the other side of the processing unit plane (85).

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