EP3615269B1 - Machine tool with adjustable handle assembly - Google Patents
Machine tool with adjustable handle assembly Download PDFInfo
- Publication number
- EP3615269B1 EP3615269B1 EP18723713.6A EP18723713A EP3615269B1 EP 3615269 B1 EP3615269 B1 EP 3615269B1 EP 18723713 A EP18723713 A EP 18723713A EP 3615269 B1 EP3615269 B1 EP 3615269B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- handle
- eccentric lever
- machine
- machine tool
- tool housing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 238000010168 coupling process Methods 0.000 claims description 42
- 238000005859 coupling reaction Methods 0.000 claims description 42
- 230000008878 coupling Effects 0.000 claims description 24
- 230000013011 mating Effects 0.000 claims 4
- 210000002414 leg Anatomy 0.000 description 19
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000004873 anchoring Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 210000000689 upper leg Anatomy 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
- B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
- B25F5/02—Construction of casings, bodies or handles
- B25F5/025—Construction of casings, bodies or handles with torque reaction bars for rotary tools
- B25F5/026—Construction of casings, bodies or handles with torque reaction bars for rotary tools in the form of an auxiliary handle
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B23/00—Portable grinding machines, e.g. hand-guided; Accessories therefor
- B24B23/005—Auxiliary devices used in connection with portable grinding machines, e.g. holders
Definitions
- the invention relates to a machine tool, in particular a hand-held machine tool, with a machine tool housing and a handle arrangement whose angular position can be adjusted relative to the machine tool housing.
- the handle arrangement contains at least one handle with at least one coupling means, which can be adjusted in its angular position relative to at least one counter-coupling means of the machine tool housing and can be moved linearly along a movement axis.
- the handle assembly holds a locking mechanism, which is designed to fix the handle in a coupled state, in which the coupling means of the handle is engaged with the counter-coupling means of the machine tool housing, so that the handle and the machine tool housing are firmly connected to each other, and in a release decoupled state, in which the coupling means of the handle is disengaged from the counter-coupling means of the machine tool housing, so that the handle is adjustable relative to the machine tool housing in its angular position.
- a generic machine tool is out DE 299 12 406 U1 known.
- Machine tools of the type mentioned are known from the prior art.
- Machine tools particularly hand-held machine tools such as a hand grinder, are typically provided with a rigid, rear guide handle near the on/off switch and an often moveable, partially detachable front handle.
- the front handle is usually in the form of a rod or a bow.
- the front handle can usually be swiveled around the connection point to the machine tool housing in order to be able to adapt the ergonomics of the machine tool to different working conditions, such as grinding or cutting on a surface, in corners or niches, etc.
- the front handle is adjusted using a clamping screw that presses the front handle into a face gear.
- the clamping screw can be tightened with a toggle (similar to a "wing nut") or with a tool.
- the user must note that if the tensioning screw is not sufficiently pre-tensioned, the connection between the front handle and the machine tool housing can loosen.
- the clamping screw has been tightened sufficiently.
- a further complication is that the clamping forces that can be achieved without tools are limited.
- many turns of the clamping screw are annoying for the user, especially when the front handle has to be adjusted frequently.
- the object of the present invention to provide a machine tool of the type mentioned at the outset which does not have or at least reduces the above-mentioned disadvantages of the hand-held machine tools known from the prior art.
- the present invention proposes a machine tool according to claim 1.
- the locking position of the eccentric lever is therefore assigned to the coupled state of the handle and the release position of the eccentric lever is assigned to the decoupled state of the handle.
- the functional states of the handle ie its coupled or uncoupled state, are defined without a doubt by the two end positions of the eccentric lever, ie the locking and release position.
- the locking mechanism of the machine tool according to the invention can be adjusted within a few seconds without tools.
- the eccentric lever In order to move the eccentric lever from its locking position to its release position (or vice versa), the eccentric lever is pivoted about its pivot axis, which is eccentric to the center point of the cam contour of the eccentric lever.
- the association between the states of the eccentric lever and the handle is therefore via the at least one cam contour of the eccentric lever. If the eccentric lever is in its locking position, the coupling means of the handle and the counter-coupling means engage of the machine tool housing into one another, with the cam contour preventing the handle from shifting along the axis of movement.
- the handle and the machine tool housing are firmly connected. However, when the eccentric lever is in its release position, the cam contour allows the handle to slide along the axis of movement. The handle can then, for example, be moved manually along the axis of movement in order to detach the coupling means of the handle from the counter-coupling means of the machine tool housing.
- the coupling means of the handle and the counter-coupling means of the machine tool housing form face gearing.
- the position of the stop is adjustable along the movement axis.
- the power tool housing has a dome, which extends along the movement axis, for attaching the handle arrangement.
- the dome can include a core hole, ie it can be in the form of a hollow cylinder and have an internal thread.
- the stop for the eccentric lever can be provided on an adjusting screw with an external thread, which is screwed into the internal thread of the hollow-cylindrical dome.
- the adjusting screw can alternatively be extended to the opposite side of the machine tool housing and fixed at a second attachment point of the handle.
- the dome in the machine tool housing can also be designed as an independent axle or sleeve that is connected to the opposite side of the handle.
- the adjusting screw is also in the form of a hollow cylinder and has an internal thread in addition to the external thread.
- a lock screw with an external thread can be screwed into the adjusting screw.
- the lock screw is preferably supported on the base of the core hole in the dome, in order to clamp the adjusting screw firmly in the core hole of the dome. This prevents the adjusting screw from loosening.
- the eccentric lever has two legs which each provide a cam contour at the second end of the eccentric lever and have a pivot pin.
- the pivots or their centers define the pivot axis of the eccentric lever. In this way, the eccentric lever can grip the dome with the two legs, which favors a compact design.
- the at least one bearing element is a bearing block which is arranged between the legs of the eccentric lever.
- the bearing block can have two support elements, each with a recess, the recesses accommodating the pivot pins of the eccentric lever.
- the recesses can be essentially semicircular or U-shaped and can be slid onto the pivot pins.
- the handle assembly may further include a cap that secures the eccentric lever and bearing block from rotating about the axis of movement relative to the handle.
- the eccentric lever and the bearing block can thus be arranged in a fixed position relative to the handle, but rotating with the handle.
- the handle is shaped in such a way that the eccentric lever dips into the handle in its locking position, thereby preventing the eccentric lever from being accidentally pivoted out of the locking position into the release position.
- the cap can also prevent incorrect manipulation of the adjustment screw secured with the counter screw.
- the handle can be provided with a thrust washer in this contact area.
- FIG 1A shows a hand-held machine tool known from the prior art in the form of a hand-held grinder SG.
- the well-known hand grinder SG comprises a housing G, at the rear end of which and in the vicinity of an on/off switch EAS a rear guide handle HG is arranged.
- the rear guide handle HG is rigid with the hand grinder SG.
- the hand grinder SG also includes a front handle VG, which has a bow-shaped shape.
- the front handle VG is arranged on the side of the hand grinder SG in such a way that it can be pivoted about a pivot axis and can be detached from the hand grinder SG if necessary ( Figure 1B ).
- the housing G includes a counter-coupling means GKM, which interacts with a coupling means KM on the handle VG.
- a clamping screw SP is loosened, then the front handle VG is pivoted into the desired position and finally the clamping screw SP is tightened again in order to press the coupling means KM on the handle VG back into the counter-coupling means GKM on the housing G. Due to the swiveling connection of the front handle VG to the hand grinder SG, the position of the front handle VG can be adjusted to different environmental conditions, for example grinding or cutting on the surface, in corners, niches, etc.
- a machine tool 2 according to the invention is in 2 only implied.
- the machine tool 2 comprises a machine tool housing 4 and a handle arrangement 6 whose angular position can be adjusted relative to the machine tool housing 4.
- the machine tool housing 4 can be a gear housing, for example, and have a cylindrical shape at least in the area of the handle arrangement 6.
- the handle assembly 6 includes a locking mechanism 8 and a handle 10.
- the handle 10 of the handle assembly 6 has a hollow frustoconical base 12 and an elongated, L-shaped grip portion 14 which is molded onto the hollow frustoconical base 12.
- the machine tool housing 4 includes a hollow-cylindrical dome 16 with a core hole 18, which has an internal thread ( 4 ).
- the dome 16 protrudes from the machine tool housing 4 and extends along a movement axis X.
- Out of 3 also shows that the base 12 of the handle 10 in the form of a truncated cone is formed by a casing wall 20 and a top wall 22 .
- the back of the top wall 22 of the handle 10 is the Machine tool housing 4 facing.
- the top wall 22 has an opening 24 for the dome 16 ( 4 ).
- the back of the top wall 22 facing the power tool housing 4 in the assembled state has a handle-side coupling means 26 .
- the handle-side coupling means 26 is designed as a concentric ring to the opening 24 circumferential face gearing around the opening 24.
- a planar ring area 28 on the handle side is provided radially between the opening 24 and the coupling means 26 on the top wall 22 .
- a counter-coupling means 30 on the housing side is provided concentrically to the dome 16 or to the movement axis X, which is designed as a counter-face toothing running annularly around the dome 16 ( 3 ).
- a planar annular area 32 on the housing side Arranged radially between the dome 16 and the counter-coupling means 30 is a planar annular area 32 on the housing side, which is recessed relative to the counter-coupling means 30 .
- the locking mechanism 8 makes it possible to move the handle 10 between a state coupled to the machine tool housing 4 and a state decoupled from the machine tool housing 4 .
- the counter-coupling means 30 of the machine tool housing 4 and the coupling means 26 of the handle 10 are engaged.
- the handle 10 is then firmly connected to the machine tool housing 4 and cannot move relative to the machine tool housing 4 .
- the counter-coupling means 30 of the machine tool housing 4 and the coupling means 26 of the handle 10 are disengaged.
- a relative movement between the handle 10 and the machine tool housing 4 is possible.
- the angular position of the handle 10 can be adjusted relative to the machine tool housing 4 by rotating the handle 10 about the axis of movement X.
- the coupled state between the handle arrangement 6 and the machine tool housing 4 is restored by means of the locking mechanism 8 .
- the locking mechanism 8 is described in more detail below.
- the locking mechanism 8 has a spring element 34, an eccentric lever 36, a bearing block 38 for the eccentric lever 36, a hollow-cylindrical adjusting screw 40 with an external thread (for example with Thread size M16) and an internal thread (for example with thread size M8), a lock screw 42 with an external thread and a cap 43 on.
- the spring element 34 is arranged between the machine tool housing 4 and the handle 10 . More precisely, the annular depressions 28, 32 of the top wall 22 and the machine tool housing 4 form an annular channel when the handle arrangement 6 is in the assembled state ( 4 ), in which the spring element 34 is arranged in the form of a rectangular spring. The spring element 34 thus runs concentrically to the dome 16 and to the opening 24.
- the eccentric lever 36 has a first end 44 and a second end 46. At its first end 44, the eccentric lever 36 has an elongate eccentric grip 48, from which two fork-shaped, parallel legs 50 extend in the direction of the second end 46 of the eccentric lever 36 extend. In the mounted state of the handle arrangement 6, the legs 50 rest with their outsides on the inside of the lateral surface 12 of the handle 10 in order to prevent the eccentric lever 36 from rotating about the movement axis X relative to the handle 10 ( 2 ).
- the eccentric lever 36 is between an in 2 locking position shown and a release position pivotable. As in 2 and 3 As can be seen, the handle 10 in the exemplary embodiment shown is shaped in such a way that the eccentric lever 36 dips into the L-shaped handle section 14 in its locking position.
- the legs 50 each have an outwardly curved contour 52 at the second end 46, which is essentially semicircular in the exemplary embodiment shown.
- the center point 54 of the semicircular contour 52 is in 6 shown.
- a circular pivot pin 56 is arranged on the opposite inner surfaces of the legs 50 in each case.
- the center 58 of the pivots 56 is also in 6 implied.
- the center of circle 58 of each circular pivot 56 is at a distance D from the center of circle 54 of the corresponding curved contour 52 that is greater than zero.
- each semi-circular contour 52 forms a cam contour with respect to the circle center 58 of the corresponding pivot pin 56 .
- the axis defined by the centers 54 is eccentric to the axis defined by the centers 58 which forms the pivot axis S for the eccentric lever 36 .
- the legs 50 rest with their curved contours 52 in the assembled state on the front side of the top wall 22 of the handle 10 .
- This also defines the pivot axis S of the eccentric lever 36, which extends through the Midpoints 58 of the pivot pins 56 of the two legs 50 extends.
- the handle 10 and the eccentric lever 36 are shown in their locked position.
- the bearing block 38 of the locking mechanism 8 has an annular base 60 with an opening 62 for the adjustment screw 40 and two opposing support elements 64 which extend substantially perpendicularly from the rear of the base 60 away.
- a semicircular or U-shaped recess 66 is provided at the end of the support elements 64 which is further away from the base 60 .
- the pivot pins 56 of the legs 50 are accommodated in the recesses 66 of the support elements 64 .
- the support elements 64 point towards the top wall 22 and lie against the insides of the legs 50 .
- bores for the pivot pins 56 can alternatively also be provided in the support elements 64.
- the hollow cylindrical adjustment screw 40 of the locking mechanism 8 has an elongated body portion 68 and a head portion 70 through which a bore 72 extends. Between the body section 68 and the head section 70 there is an annular circumferential shoulder 74 on which the base 60 of the bearing block 38 rests when the handle arrangement 6 is in the assembled state.
- the body portion 68 of the adjustment screw 40 has external threads and internal threads. When the handle arrangement 6 is in the assembled state, the adjusting screw 40 is screwed with its external thread into the internal thread of the dome 16 .
- the adjusting screw 40 extends through the opening 62 in the base 60 of the bearing block 38, the opening 24 in the top wall 22 of the handle 10, the spring element 34 and finally through the dome 16 of the machine tool housing 4.
- the spring element 34, the handle 10, the eccentric lever 36 and the bearing block 38 are threaded onto the dome 16 of the machine tool housing 4 and screwed to the hollow-cylindrical adjusting screw 40.
- the lock screw 42 is screwed into the bore 72 of the adjusting screw 40.
- the lock screw 42 can be a hexagon socket screw, for example.
- the end of the lock screw 42 plunging into the bore 72 is supported against a shoulder 78 formed by the core hole 18 of the dome 16 in order to clamp the adjusting screw 40 firmly in the dome 16 .
- the handle assembly 6 also includes the cap 43.
- the cap 43 has an essentially rectangular base wall 82 , from the rear of which four walls extend essentially perpendicularly to the base wall 82 in the direction of the machine tool housing 4 . More specifically, two substantially parallel side walls 84 extend from the base wall 82, a bottom wall 86 substantially perpendicular to the side walls 84 and an arm 88 substantially parallel to the bottom wall 86.
- the side walls 84 are each provided with a recess at their end closer to the bottom wall 86 90 provided.
- the arm 88 On its side facing the bottom wall 86, the arm 88 has a latching device 92 in the form of a wedge-shaped projection.
- the cap 43 In the mounted state of the handle arrangement 6, the cap 43 is accommodated between the legs 50 of the eccentric lever 36, the legs 50 of the eccentric lever 36 resting with their inner surfaces on the side walls 84 of the cap 43. As a result, the outer sides of the side walls 84 of the cap 43 serve to guide the legs 50 of the eccentric lever 36 during its pivoting movement from the locking position to the release position and vice versa. In addition, the cap 43 is supported with the base wall 86 on the lateral surface 12 of the handle 10 . This arrangement ensures that the cap 43 cannot rotate about the movement axis X relative to the handle 10 .
- the cap 43 is secured against axial displacement along the movement axis X away from the machine tool housing 4 in the assembled state of the handle arrangement 6 in that the eccentric handle 48 overlaps with the upper end of the base wall 82 of the cap 43 in the radial direction and in front of the upper end in the axial direction of the base wall 82 ( 2 ).
- the bearing block 38 is arranged between the arm 88 and the bottom wall 86 .
- the locking device 92 of the arm 88 engages behind the base 60 of the bearing block 38 and the two support elements 64 of the bearing block 38 are accommodated in the recesses 90 of the cap 43 . this is in 7 shown. In this way, the bearing block 38 is secured relative to the cap 43 and thus also to the handle 10 both against rotation about the X axis of movement and against axial displacement along the X axis of movement.
- the operation of the handle assembly 6 is as follows: In the coupled state, the counter-coupling means 30 of the machine tool housing 4 engages with the coupling means 26 of the handle 10 against the action of the spring element 34 . The opposing force to the spring force is applied by the other components of the locking mechanism 8 .
- the distance between the adjusting screw 40 and the machine tool housing 4 or its counter-coupling means 30 is set in such a way that in 2 illustrated locking position of the eccentric lever 36, the cam contours 52 of the legs 50 press with a predefined compressive force against the top wall 22.
- the pivot pins 56 of the legs 50 are pressed against the bearing block 38 and this against the shoulder 74 of the adjusting screw 40.
- the adjusting screw 40 can exert the corresponding counterforce on the bearing block 38 . Since the handle arrangement 6 is in equilibrium in the coupled state, ie it does not move, the pressure force caused by the eccentric lever 36 must be kept in balance by the spring force caused by the spring element 34 . Both the compressive force caused by the eccentric lever 36 and the spring force caused by the spring element 34 act on the top wall 22 of the handle 10, but in opposite directions and can therefore balance each other out.
- the eccentric lever 36 is brought from the locking position to the release position by pivoting the eccentric lever 36 in the direction away from the handle 10 about the pivot axis S, the curved contours 52 of the two legs 50 slide on the top wall 22.
- the distance between the Pivot axis S of the eccentric lever 36 and the points of contact of the curved contours 52 on the top wall 22 is reduced, so that the spring element 34 can relax.
- the relaxation of the spring element 34 pushes the handle 10 away from the machine tool housing 4 , as a result of which the counter-coupling means 30 of the machine tool housing 4 disengages from the coupling means 26 of the handle 10 .
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- Mechanical Engineering (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Description
Die Erfindung betrifft eine Werkzeugmaschine, insbesondere eine handgeführte Werkzeugmaschine, mit einem Werkzeugmaschinengehäuse und einer gegenüber dem Werkzeugmaschinengehäuse in ihrer Winkellage verstellbaren Griffanordnung. Die Griffanordnung enthält wenigstens einen Griff mit wenigstens einem Kopplungsmittel, welcher relativ zu wenigstens einem Gegenkopplungsmittel des Werkzeugmaschinengehäuses in seiner Winkellage verstellbar sowie entlang einer Bewegungsachse linear beweglich ist. Ferner anhält die Griffanordnung einen Verriegelungsmechanismus, welcher dazu ausgebildet ist, den Griff in einem gekoppelten Zustand festzulegen, bei welchem das Kopplungsmittel des Griffs in Eingriff mit dem Gegenkopplungsmittel des Werkzeugmaschinengehäuses ist, so dass der Griff und das Werkzeugmaschinengehäuse fest miteinander verbunden sind, und in einem entkoppelten Zustand freizugeben, bei welchem das Kopplungsmittel des Griffs außer Eingriff mit dem Gegenkopplungsmittel des Werkzeugmaschinengehäuses ist, so dass der Griff relativ zum Werkzeugmaschinengehäuse in seiner Winkellage verstellbar ist. Eine gattungsgemässe Werkzeugmaschine ist aus
Werkzeugmaschinen der eingangs genannten Art sind aus dem Stand der Technik bekannt. Werkzeugmaschinen, insbesondere handgeführte Werkzeugmaschine, wie beispielsweise Handschleifgerät, sind typischerweise mit einem starren, hinteren Führungsgriff in der Nähe des Ein-/Ausschalters und einem häufig beweglichen, teilweise abnehmbaren vorderen Handgriff versehen. Der vordere Handgriff ist in der Regel stab- oder bügelförmig ausgeführt. In der bügelförmigen Ausführungsform ist der vordere Handgriff meist um den Anbindungspunkt an das Werkzeugmaschinengehäuse schwenkbar, um die Ergonomie der Werkzeugmaschine an unterschiedliche Arbeitsgegebenheiten anpassen zu können, etwa an das Schleifen oder Trennen auf einer Fläche, in Ecken oder Nischen etc.Machine tools of the type mentioned are known from the prior art. Machine tools, particularly hand-held machine tools such as a hand grinder, are typically provided with a rigid, rear guide handle near the on/off switch and an often moveable, partially detachable front handle. The front handle is usually in the form of a rod or a bow. In the bow-shaped embodiment, the front handle can usually be swiveled around the connection point to the machine tool housing in order to be able to adapt the ergonomics of the machine tool to different working conditions, such as grinding or cutting on a surface, in corners or niches, etc.
Das Verstellen des vorderen Handgriffs erfolgt in den meisten Fällen über eine Spannschraube, die den vorderen Handgriff in eine Planverzahnung drückt. Die Spannschraube kann über einen Knebel (ähnlich einer "Flügelmutter") oder mit einem Werkzeug angezogen werden. Dabei muss der Anwender beachten, dass sich bei unzureichender Vorspannung der Spannschraube die Verbindung zwischen dem vorderen Handgriff und dem Werkzeugmaschinengehäuse lockern kann. Allerdings ist dem Anwender oft nicht klar, wann die Spannschraube fest genug angezogen ist. Erschwerend kommt hinzu, dass die ohne Werkzeug erreichbaren Klemmkräfte begrenzt sind. Darüber hinaus sind vor allem dann, wenn der vordere Handgriff häufig verstellt werden muss, vielen Umdrehungen an der Spannschraube für den Anwender lästig.In most cases, the front handle is adjusted using a clamping screw that presses the front handle into a face gear. The clamping screw can be tightened with a toggle (similar to a "wing nut") or with a tool. The user must note that if the tensioning screw is not sufficiently pre-tensioned, the connection between the front handle and the machine tool housing can loosen. However, it is often not clear to the user when the clamping screw has been tightened sufficiently. A further complication is that the clamping forces that can be achieved without tools are limited. In addition, many turns of the clamping screw are annoying for the user, especially when the front handle has to be adjusted frequently.
Es ist die Aufgabe der vorliegenden Erfindung, eine Werkzeugmaschine der eingangs genannten Art bereitzustellen, welche die oben genannten Nachteile der aus dem Stand der Technik bekannten handgeführten Werkzeugmaschinen nicht aufweist oder zumindest mindert. Zur Lösung der Aufgabe schlägt die vorliegende Erfindung eine Werkzeugmaschine gemäss Anspruch 1 vor.It is the object of the present invention to provide a machine tool of the type mentioned at the outset which does not have or at least reduces the above-mentioned disadvantages of the hand-held machine tools known from the prior art. To solve the problem, the present invention proposes a machine tool according to claim 1.
Bei der erfindungsgemäßen Werkzeugmaschine ist also die Verriegelungsposition des Exzenterhebels dem gekoppelten Zustand des Griffs und die Freigabeposition des Exzenterhebels dem entkoppelten Zustand des Griffs zugeordnet. Mit anderen Worten sind durch die beiden Endlagen des Exzenterhebels, also die Verriegelungs- und Freigabeposition, die funktionalen Zustände des Griffs, also sein gekoppelter bzw. entkoppelter Zustand, zweifelsfrei definiert. Der Verriegelungsmechanismus der erfindungsgemäßen Werkzeugmaschine lässt sich werkzeuglos innerhalb weniger Sekunden verstellen.In the machine tool according to the invention, the locking position of the eccentric lever is therefore assigned to the coupled state of the handle and the release position of the eccentric lever is assigned to the decoupled state of the handle. In other words, the functional states of the handle, ie its coupled or uncoupled state, are defined without a doubt by the two end positions of the eccentric lever, ie the locking and release position. The locking mechanism of the machine tool according to the invention can be adjusted within a few seconds without tools.
Um den Exzenterhebel von seiner Verriegelungsposition in seine Freigabeposition (oder umgekehrt) zu überführen, wird der Exzenterhebel um seine Schwenkachse geschwenkt, welche exzentrisch zum Mittelpunkt der Nockenkontur des Exzenterhebels ist. Die Zuordnung zwischen den Zuständen des Exzenterhebels und des Griffs erfolgt also über die wenigstens eine Nockenkontur des Exzenterhebels. Befindet sich der Exzenterhebels in seiner Verriegelungsposition, greifen das Kopplungsmittel des Griffs und das Gegenkopplungsmittel des Werkzeugmaschinengehäuses ineinander, wobei die Nockenkontur ein Verschieben des Griffs entlang der Bewegungsachse verhindert. Der Griff und das Werkzeugmaschinengehäuse sind fest miteinander verbunden. Befindet sich der Exzenterhebel hingegen in seiner Freigabeposition, lässt die Nockenkontur ein Verschieben des Griffs entlang der Bewegungsachse zu. Dann kann der Griff beispielsweise manuell entlang der Bewegungsachs verschoben werden, um das Kopplungsmittel des Griffs vom Gegenkopplungsmittel des Werkzeugmaschinengehäuses zu lösen.In order to move the eccentric lever from its locking position to its release position (or vice versa), the eccentric lever is pivoted about its pivot axis, which is eccentric to the center point of the cam contour of the eccentric lever. The association between the states of the eccentric lever and the handle is therefore via the at least one cam contour of the eccentric lever. If the eccentric lever is in its locking position, the coupling means of the handle and the counter-coupling means engage of the machine tool housing into one another, with the cam contour preventing the handle from shifting along the axis of movement. The handle and the machine tool housing are firmly connected. However, when the eccentric lever is in its release position, the cam contour allows the handle to slide along the axis of movement. The handle can then, for example, be moved manually along the axis of movement in order to detach the coupling means of the handle from the counter-coupling means of the machine tool housing.
Bevorzugt bilden das Kopplungsmittel des Griffs und das Gegenkopplungsmittel des Werkzeugmaschinengehäuses eine Planverzahnung.Preferably, the coupling means of the handle and the counter-coupling means of the machine tool housing form face gearing.
Um die auf den Griff wirkende Klemmkraft und die vom Anwender beim Schwenken des Exzenterhebels aufzubringende Kraft einstellen zu können, ist es weiter bevorzugt, dass die Position des Anschlags entlang der Bewegungsachse einstellbar ist.In order to be able to adjust the clamping force acting on the handle and the force to be applied by the user when pivoting the eccentric lever, it is further preferred for the position of the stop to be adjustable along the movement axis.
Gemäß einer weiteren bevorzugten Ausführungsform weist das Werkzeugmaschinengehäuse einen sich entlang der Bewegungsachse erstreckenden Dom zum Anbringen der Griffanordnung auf. Der Dom kann ein Kernloch umfassen, also hohlzylinderförmig sein und ein Innengewinde aufweisen. In diesem Fall kann der Anschlag für den Exzenterhebel an einer Justierschraube mit einem Außengewinde vorgesehen sein, welche in das Innengewinde des hohlzylinderförmigen Doms eingeschraubt ist.According to a further preferred embodiment, the power tool housing has a dome, which extends along the movement axis, for attaching the handle arrangement. The dome can include a core hole, ie it can be in the form of a hollow cylinder and have an internal thread. In this case, the stop for the eccentric lever can be provided on an adjusting screw with an external thread, which is screwed into the internal thread of the hollow-cylindrical dome.
Im Falle einer beidseitigen Griffanbindung kann die Justierschraube alternativ bis auf die gegenüberliegende Seite des Werkzeugmaschinengehäuses verlängert und an einem zweiten Befestigungspunkt des Griffs fixiert werden. Weiter alternativ kann auch der Dom im Werkzeugmaschinengehäuse als eigenständige Achse oder Hülse ausgeführt sein, die mit der Gegenseite des Griffs verbunden ist.In the case of a handle connection on both sides, the adjusting screw can alternatively be extended to the opposite side of the machine tool housing and fixed at a second attachment point of the handle. As a further alternative, the dome in the machine tool housing can also be designed as an independent axle or sleeve that is connected to the opposite side of the handle.
Gemäß einer bevorzugten Ausführungsform ist auch die Justierschraube hohlzylinderförmig und weist zusätzlich zum Außengewinde ein Innengewinde auf. Um die Justierschraube in ihrer axialen Position innerhalb des Doms zu sichern, kann eine Konterschraube mit einem Außengewinde in die Justierschraube eingeschraubt sein. Die Konterschraube stützt sich dabei bevorzugt auf dem Boden des Kernlochs im Dom ab, um die Justierschraube fest im Kernloch des Doms einzuspannen. Ein Lockern der Justierschraube wird damit verhindert.According to a preferred embodiment, the adjusting screw is also in the form of a hollow cylinder and has an internal thread in addition to the external thread. In order to secure the adjusting screw in its axial position within the dome, a lock screw with an external thread can be screwed into the adjusting screw. The lock screw is preferably supported on the base of the core hole in the dome, in order to clamp the adjusting screw firmly in the core hole of the dome. This prevents the adjusting screw from loosening.
Gemäß einer weiteren bevorzugten Ausführungsform weist der Exzenterhebel zwei Schenkel auf, welche am zweiten Ende des Exzenterhebels jeweils eine Nockenkontur bereitstellen und einen Drehzapfen aufweisen. Die Drehzapfen bzw. ihre Mittelpunkte definieren in diesem Fall die Schwenkachse des Exzenterhebels. Auf diese Weise kann der Exzenterhebel den Dom mit den zwei Schenkeln umgreifen, was eine kompakte Bauweise begünstigt.According to a further preferred embodiment, the eccentric lever has two legs which each provide a cam contour at the second end of the eccentric lever and have a pivot pin. In this case, the pivots or their centers define the pivot axis of the eccentric lever. In this way, the eccentric lever can grip the dome with the two legs, which favors a compact design.
Um eine möglichst kompakte Bauweise der Griffanordnung zu gewährleisten, kann weiter vorgesehen sein, dass das wenigstens eine Lagerelement ein Lagerbock ist, welcher zwischen den Schenkeln des Exzenterhebels angeordnet ist. Ferner kann der Lagerbock zwei Stützelemente mit jeweils einer Ausnehmung aufweisen, wobei die Ausnehmungen die Drehzapfen des Exzenterhebels aufnehmen. Die Ausnehmungen können aus Gründen einer einfachen Montage der Griffanordnung im Wesentlichen halbkreisförmig oder U-förmig sein und auf die Drehzapfen aufgeschoben werden.In order to ensure the most compact possible construction of the handle arrangement, it can further be provided that the at least one bearing element is a bearing block which is arranged between the legs of the eccentric lever. Furthermore, the bearing block can have two support elements, each with a recess, the recesses accommodating the pivot pins of the eccentric lever. For reasons of simple assembly of the handle arrangement, the recesses can be essentially semicircular or U-shaped and can be slid onto the pivot pins.
Die Griffanordnung kann ferner eine Kappe enthalten, welche den Exzenterhebel und den Lagerbock gegen ein Verdrehen um die Bewegungsachse relativ zum Griff sichert. Der Exzenterhebel und der Lagerbock können also ortsfest zum Griff, aber mit dem Griff mitdrehend angeordnet sein. In diesem Fall ist es vorteilhaft, wenn der Griff derart geformt ist, dass der Exzenterhebel in seiner Verriegelungsposition in den Griff eintaucht, wodurch ein versehentliches Verschwenken des Exzenterhebels aus der Verriegelungsposition in die Freigabeposition verhindert wird. Alternativ ist es möglich, den Exzenterhebel ortsfest zum Werkzeugmaschinengehäuse oder undefiniert am Werkzeugmaschinengehäuse auszuführen.The handle assembly may further include a cap that secures the eccentric lever and bearing block from rotating about the axis of movement relative to the handle. The eccentric lever and the bearing block can thus be arranged in a fixed position relative to the handle, but rotating with the handle. In this case, it is advantageous if the handle is shaped in such a way that the eccentric lever dips into the handle in its locking position, thereby preventing the eccentric lever from being accidentally pivoted out of the locking position into the release position. Alternatively, it is possible to design the eccentric lever to be stationary with respect to the machine tool housing or undefined on the machine tool housing.
Die Kappe kann zusätzlich eine Fehlmanipulation an der mit der Konterschraube gesicherten Justierschraube verhindern.The cap can also prevent incorrect manipulation of the adjustment screw secured with the counter screw.
Beim Schwenken des Exzenterhebels gleitet die wenigstens eine Nockenkontur entlang einer Bewegungsbahn. Um den Verschleiß im Bereich der Kontaktfläche zwischen der wenigstens einen Nockenkontur und dem Griff zu verringern, kann der Griff in diesem Kontaktbereich mit einer Anlaufscheibe versehen sein.When the eccentric lever pivots, the at least one cam contour slides along a movement path. In order to reduce wear in the area of the contact surface between the at least one cam contour and the handle, the handle can be provided with a thrust washer in this contact area.
Weitere Vorteile ergeben sich aus der folgenden Figurenbeschreibung. In den Figuren sind verschiedene Ausführungsbeispiele der vorliegenden Erfindung dargestellt. Die Figuren, die Beschreibung und die Ansprüche enthalten zahlreiche Merkmale in Kombination. Der Fachmann wird die Merkmale zweckmäßigerweise auch einzeln betrachten und zu sinnvollen weiteren Kombinationen zusammenfassen.Further advantages result from the following description of the figures. Various exemplary embodiments of the present invention are shown in the figures. The figures, 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 further meaningful combinations.
In den Figuren sind gleiche und gleichartige Komponenten mit gleichen Bezugszeichen beziffert.In the figures, the same and similar components are denoted by the same reference symbols.
Es zeigen:
- Fig. 1A/B
- eine bekannte handgeführte Werkzeugmaschine mit verstellbarem Handgriff;
- Fig. 2
- eine Griffanordnung an einer erfindungsgemäßen Werkzeugmaschine;
- Fig. 3
- die Griffanordnung der
Fig. 2 in einer Explosionsdarstellung; - Fig. 4
- die Griffanordnung der
Fig. 2 in einer Schnittdarstellung; - Fig. 5
- einen Handgriff in einer perspektivischen Ansicht;
- Fig. 6
- eine Nockenkontur in einer Draufsicht;
- Fig. 7
- einen Exzenterhebel, einen Lagerbock und eine Kappe im zusammengesetzten Zustand in einer perspektivischen Ansicht; und
- Fig. 8
- den Handgriff der
Fig. 5 mit eingesetztem Exzenterhebel.
- Figure 1A/B
- a known hand-held machine tool with an adjustable handle;
- 2
- a handle assembly on a machine tool according to the invention;
- 3
- the
handle arrangement 2 in an exploded view; - 4
- the
handle arrangement 2 in a sectional view; - figure 5
- a handle in a perspective view;
- 6
- a cam contour in a plan view;
- 7
- an eccentric lever, a bearing block and a cap in the assembled state in a perspective view; and
- 8
- the handle of
figure 5 with inserted eccentric lever.
Eine erfindungsgemäße Werkzeugmaschine 2 ist in
Wie in der Explosionsdarstellung der
Aus
Die dem Werkzeugmaschinengehäuse 4 im montierten Zustand zugewandte Rückseite der Deckenwandung 22 weist ein griffseitiges Kopplungsmittel 26 auf. Wie in
Konzentrisch zum Dom 16 bzw. zur Bewegungsachse X ist ein gehäuseseitiges Gegenkopplungsmittel 30 vorgesehen, welches als ringförmig um den Dom 16 umlaufende Gegenplanverzahnung ausgestaltet ist (
Der Verriegelungsmechanismus 8 ermöglicht es, den Handgriff 10 zwischen einem mit dem Werkzeugmaschinengehäuse 4 gekoppelten Zustand und einem mit dem Werkzeugmaschinengehäuse 4 entkoppelten Zustand zu bewegen.The locking mechanism 8 makes it possible to move the
Befinden sich der Handgriff 10 und das Werkzeugmaschinengehäuse 4 im gekoppelten Zustand, sind das Gegenkopplungsmittel 30 des Werkzeugmaschinengehäuses 4 und das Kopplungsmittel 26 des Handgriffs 10 in Eingriff. Der Handgriff 10 ist dann fest mit dem Werkzeugmaschinengehäuse 4 verbunden und kann sich nicht relativ zum Werkzeugmaschinengehäuse 4 bewegen.If the
Befinden sich der Handgriff 10 und das Werkzeugmaschinengehäuse 4 im entkoppelten Zustand, sind das Gegenkopplungsmittel 30 des Werkzeugmaschinengehäuses 4 und das Kopplungsmittel 26 des Handgriffs 10 außer Eingriff. Dadurch ist eine Relativbewegung zwischen dem Handgriff 10 und dem Werkzeugmaschinengehäuse 4 möglich. Insbesondere kann die Winkellage des Handgriffs 10 relativ zum Werkzeugmaschinengehäuse 4 verstellt werden, indem der Handgriff 10 um die Bewegungsachse X gedreht wird. Um die eingestellte Winkellage festzulegen, wird mittels des Verriegelungsmechanismus 8 wieder der gekoppelte Zustand zwischen der Griffanordnung 6 und dem Werkzeugmaschinengehäuse 4 hergestellt.If the
Der Verriegelungsmechanismus 8 wird im Folgenden näher beschrieben.The locking mechanism 8 is described in more detail below.
Der Verriegelungsmechanismus 8 weist im dargestellten Ausführungsbeispiel ein Federelement 34, einen Exzenterhebel 36, einen Lagerbock 38 für den Exzenterhebel 36, eine hohlzylinderförmige Justierschraube 40 mit einem Außengewinde (beispielsweise mit Gewindemaß M16) und einem Innengewinde (beispielsweise mit Gewindemaß M8), eine Konterschraube 42 mit einem Außengewinde auf und eine Kappe 43 auf.In the exemplary embodiment shown, the locking mechanism 8 has a
In
Wie in
Der Exzenterhebel 36 ist zwischen einer in
Die Schenkel 50 haben am zweiten Ende 46 jeweils eine nach außen gekrümmte Kontur 52, welche im dargestellten Ausführungsbeispiel im Wesentlichen halbkreisförmig ist. Der Mittelpunkt 54 der halbkreisförmigen Kontur 52 ist in
Wie in
Der Lagerbock 38 des Verriegelungsmechanismus 8 weist eine ringförmige Basis 60 mit einer Öffnung 62 für die Justierschraube 40 und zwei sich gegenüberliegende Stützelemente 64 auf, welche sich im Wesentlichen senkrecht von der Rückseite der Basis 60 weg erstrecken. An dem der Basis 60 ferneren Ende der Stützelemente 64 ist jeweils eine halbkreisförmige oder U-förmige Ausnehmung 66 vorgesehen. Im montierten Zustand sind die Drehzapfen 56 der Schenkel 50 in den Ausnehmungen 66 der Stützelemente 64 aufgenommen. Dabei weisen die Stützelemente 64 zur Deckenwandung 22 hin und liegen an den Innenseiten der Schenkel 50 an.The bearing
Anstelle von Ausnehmungen 66 können in den Stützelemente 64 alternativ auch Bohrungen für die Drehzapfen 56 vorgesehen sein.Instead of
Die hohlzylinderförmige Justierschraube 40 des Verriegelungsmechanismus 8 weist einen länglichen Körperabschnitt 68 und einen Kopfabschnitt 70 auf, durch welche sich eine Bohrung 72 erstreckt. Zwischen dem Körperabschnitt 68 und dem Kopfabschnitt 70 ist eine ringförmig umlaufende Schulter 74 ausgebildet, an welcher die Basis 60 des Lagerbocks 38 im montierten Zustand der Griffanordnung 6 anliegt. Der Köperabschnitt 68 der Justierschraube 40 weist ein Außengewinde und ein Innengewinde auf. Im montierten Zustand der Griffanordnung 6 ist die Justierschraube 40 mit ihrem Außengewinde in das Innengewinde des Doms 16 geschraubt. Genauer erstreckt sich die Justierschraube 40 im montierten Zustand der Griffanordnung 6 durch die Öffnung 62 in der Basis 60 des Lagerbocks 38, die Öffnung 24 in der Deckenwandung 22 des Handgriffs 10, das Federelement 34 und schließlich durch den Dom 16 des Werkzeugmaschinengehäuses 4.The hollow
Bei der Montage der Griffanordnung 6 an das Werkzeugmaschinengehäuse 4 wird der Reihe nach das Federelement 34, der Handgriff 10, der Exzenterhebel 36 und der Lagerbock 38 auf den Dom 16 des Werkzeugmaschinengehäuses 4 aufgefädelt und mit der hohlzylinderförmigen Justierschraube 40 verschraubt. Zum Sichern der axialen Position der Justierschraube 40 gegenüber dem Werkzeugmaschinengehäuse 4 wird die Konterschraube 42 in die Bohrung 72 der Justierschraube 40 geschraubt. Die Konterschraube 42 kann beispielsweise eine Innensechskantschraube sein. Wie in
Auf diese Weise kann zwischen der Schulter 74 der Justierschraube 40, welche als Anschlag für den Lagerbock 38 dient, und dem Gegenkopplungsmittel 30 des Werkzeugmaschinengehäuses 4 ein definierter Abstand eingestellt werden. Dies wiederum definiert auch einen vorbestimmten Abstand zwischen der Schwenkachse S des Exzenterhebels 48 und dem Gegenkopplungsmittel 30 des Werkzeugmaschinengehäuses 4.In this way, a defined distance can be set between the
Im dargestellten Ausführungsbeispiel umfasst die Griffanordnung 6 außerdem die Kappe 43. Aus
Im montierten Zustand der Griffanordnung 6 ist die Kappe 43 zwischen den Schenkeln 50 des Exzenterhebels 36 aufgenommen, wobei die Schenkel 50 des Exzenterhebels 36 mit ihren Innenflächen an den Seitenwänden 84 der Kappe 43 anliegen. Dadurch dienen die Außenseiten der Seitenwände 84 der Kappe 43 dem Führen der Schenkel 50 des Exzenterhebels 36 bei seiner Schwenkbewegung von der Verriegelungsposition in die Freigabeposition und umgekehrt. Darüber hinaus stützt sich die Kappe 43 mit der Bodenwand 86 an der Mantelfläche 12 des Handgriffs 10 ab. Durch diese Anordnung ist sichergestellt, dass sich die Kappe 43 relativ zum Handgriff 10 nicht um die Bewegungsachse X drehen kann. Gegen eine axiale Verschiebung entlang der Bewegungsachse X vom Werkzeugmaschinengehäuse 4 weg ist die Kappe 43 im montierten Zustand der Griffanordnung 6 dadurch gesichert, dass der Exzentergriff 48 in radialer Richtung mit dem oberen Ende der Basiswand 82 der Kappe 43 überlappt und in axialer Richtung vordem oberen Ende der Basiswand 82 angeordnet ist (
Der Lagerbock 38 ist zwischen dem Arm 88 und der Bodenwand 86 angeordnet. Die Rastvorrichtung 92 des Arms 88 hintergreift dabei die Basis 60 des Lagerbocks 38 und die beiden Stützelemente 64 des Lagerbocks 38 sind in den Ausnehmungen 90 der Kappe 43 aufgenommen. Dies ist in
Die Funktionsweise der Griffanordnung 6 ist wie folgt:
Im gekoppelten Zustand ist das Gegenkopplungsmittel 30 des Werkzeugmaschinengehäuses 4 mit dem Kopplungsmittel 26 des Handgriffs 10 gegen die Wirkung des Federelements 34 in Eingriff. Die Gegenkraft zur Federkraft wird durch die anderen Komponenten des Verriegelungsmechanismus 8 aufgebracht. Dazu ist der Abstand zwischen Justierschraube 40 und dem Werkzeugmaschinengehäuse 4 bzw. dessen Gegenkopplungsmittel 30 derart eingestellt, dass in der in
In the coupled state, the counter-coupling means 30 of the
Wird der Exzenterhebel 36 aus der Verriegelungsposition in die Freigabeposition gebracht, indem der Exzenterhebel 36 in Richtung vom Handgriff 10 weg um die Schwenkachse S verschwenkt wird, gleiten die gekrümmten Konturen 52 der beiden Schenkel 50 auf der Deckenwandung 22. Insbesondere verringert sich der Abstand zwischen der Schwenkachse S des Exzenterhebels 36 und den Berührungspunkten der gekrümmten Konturen 52 auf der Deckenwandung 22. Auf diese Weise verringert sich die vom Exzenterhebel 36 auf die Deckenwandung 22 des Handgriffs 10 bewirkte Druckkraft, so dass sich das Federelement 34 entspannen kann. Durch das Entspannen des Federelements 34 wird der Handgriff 10 vom Werkzeugmaschinengehäuse 4 weggedrückt, wodurch das Gegenkopplungsmittel 30 des Werkzeugmaschinengehäuses 4 außer Eingriff mit dem Kopplungsmittel 26 des Handgriffs 10 kommt.If the
- 22
- Werkzeugmaschinenmachine tools
- 44
- Werkzeugmaschinengehäusemachine tool housing
- 66
- Griffanordnunghandle arrangement
- 88th
- Verriegelungsmechanismuslocking mechanism
- 1010
- Handgriffhandle
- 1212
- Hohlkegelstumpfförmige BasisHollow truncated base
- 1414
- L-förmiger GriffabschnittL-shaped handle section
- 1616
- DomDom
- XX
- Bewegungsachsemotion axis
- 1818
- Kernlochcore hole
- 2020
- Mantelwandungshell wall
- 2222
- Deckenwandungceiling wall
- 2424
- Öffnungopening
- 2626
- Griffseitiges KopplungsmittelHandle side coupling means
- 2828
- Griffseitiger RingbereichRing area on handle side
- 3030
- Gehäuseseitiges GegenkopplungsmittelEnclosure-side negative feedback means
- 3232
- Gehäuseseitiger RingbereichHousing-side ring area
- 3434
- Federelementspring element
- 3636
- Exzenterhebeleccentric lever
- SS
- Schwenkachsepivot axis
- 3838
- Lagerbockbearing block
- 4040
- Hohlzylinderförmige JustierschraubeCylindrical adjusting screw
- 4242
- Konterschraubelock screw
- 4343
- Kappecap
- 4444
- Erstes Ende des ExzenterhebelsFirst end of eccentric lever
- 4646
- Zweites Ende des ExzenterhebelsSecond end of eccentric lever
- 4848
- Exzentergriffeccentric grip
- 5050
- Schenkel des ExzenterhebelsLeg of the eccentric lever
- 5252
- Gekrümmte Kontur eines SchenkelsCurved contour of a thigh
- 5454
- Mittelpunkt der gekrümmte Kontur eines SchenkelsCenter point of the curved contour of a leg
- 5656
- Drehzapfenpivot
- 5858
- Mittelpunkt eines Drehzapfenscenter of a pivot
- DD
-
Abstand zwischen den Mittelpunkten 54 und 58Distance between
54 and 58centers - 6060
- Ringförmige Basis des LagerbocksRing-shaped base of the bearing block
- 6262
- Öffnung in der Basis des LagerbocksOpening in the base of the pillow block
- 6464
- Stützelemente des LagerbocksSupporting elements of the bearing block
- 6666
- Halbkreisförmige Ausnehmung in den Stützelementen des LagerbocksSemi-circular recess in the support elements of the bearing block
- 6868
- Länglichen Körperabschnitt der JustierschraubeElongated body portion of the adjustment screw
- 7070
- Kopfabschnitt der JustierschraubeAdjusting Screw Head Section
- 7272
- Bohrung der JustierschraubeAdjusting screw hole
- 7474
- Schulter der Justierschraubeshoulder of the adjusting screw
- 7878
- Absatz im Kernloch des DomsHeel in the core hole of the dome
- 8282
- Basiswand der Kappebase wall of the cap
- 8484
- Seitenwände der Kappeside walls of the cap
- 8686
- Bodenwand der Kappebottom wall of the cap
- 8888
- Arm der Kappearm of the cap
- 9090
- Ausnehmungrecess
- 9292
- Rastvorrichtunglocking device
Claims (9)
- Machine tool (2), in particular hand-held machine tool, having a machine-tool housing (4) and a handle assembly (6) that can be adjusted in terms of its angular position with respect to the machine-tool housing (4), wherein the handle assembly (6) includes:at least one handle (10) with at least one coupling means (26), which can be adjusted in terms of its angular position relative to at least one mating coupling means (30) of the machine-tool housing (4) and can be moved linearly along a movement axis (X), anda locking mechanism (8), which is designed to fix the handle (10) in a coupled state, in which the coupling means (26) of the handle (10) is in engagement with the mating coupling means (30) of the machine-tool housing (4), so that the handle (10) and the machine-tool housing (4) are firmly connected to each other, and to release the same in an uncoupled state, in which the coupling means (26) of the handle (10) is out of engagement with the mating coupling means (30) of the machine-tool housing (4), so that the handle (10) can be adjusted in terms of its angular position relative to the machine-tool housing (4),wherein the locking mechanism (8) includes:an eccentric lever (36) having a first end (44) and a second end (46), which can be pivoted reversibly between a locked position and a release position about a pivot axis (S) extending at right angles to the movement axis (X) and provided in the area of the second end (46),at least one bearing element (38) for pivotably supporting and holding the eccentric lever (36), anda stop (74) for the eccentric lever (36) for defining a predetermined distance between the pivot axis (S) and the mating coupling means (30) of the machine-tool housing (4),wherein at least one cam contour (52), the centre (54) of which is located outside the pivot axis (S), is provided at the second end (46) of the eccentric lever (36), so that the handle (10) is transferred into the coupled state by pivoting the eccentric lever (36) into the locked position and is released into the uncoupled state by pivoting the eccentric lever (36) into the release position,characterized in that the locking mechanism (8) further includes a spring element (34) which is arranged between the machine-tool housing (4) and the handle (10) and which transfers the handle (10) from the coupled state into the uncoupled state.
- Machine tool (2) according to Claim 1,
characterized in that the position of the stop (74) for the eccentric lever (36) is adjustable along the movement axis (X). - Machine tool (2) according to Claim 1 or 2,
characterized in that the machine-tool housing (4) has a dome (16) extending along the movement axis (X) for the attachment of the handle assembly (6). - Machine-tool (2) according to Claim 3,
characterized in that the dome (16) is hollow-cylindrical and has an internal thread, and in that the stop (74) for the eccentric lever (36) is provided on an adjusting screw (40) having an external thread, which is screwed into the internal thread of the hollow-cylindrical dome (16). - Machine tool (2) according to Claim 4,
characterized in that the adjusting screw (40) is hollow-cylindrical and has an internal thread, wherein a locking screw (42) having an external thread is screwed into the adjusting screw (40) in order to secure the adjusting screw (40) axially. - Machine tool (2) according to one of the preceding claims,
characterized in that the eccentric lever (36) has two limbs (50), which each provide a cam contour (52) at the second end (46) of the eccentric lever (36) and have a pivot pin (56), wherein the pivot pins (56) define the pivot axis (S) of the eccentric lever (36). - Machine tool (2) according to one of the preceding claims,
characterized in that the at least one bearing element is a bearing block (38), which is arranged between the limbs (50) of the eccentric lever (36). - Machine tool (2) according to Claim 7,
characterized in that the bearing block (38) has two supporting elements (64) each having a recess (66), wherein the recesses (66) receive the pivot pins (56) of the eccentric lever (36). - Machine tool (2) according to Claim 7 or 8,
characterized in that the handle assembly (6) additionally includes a cap (43), which secures the eccentric lever (36) and the bearing block (38) against rotation about the movement axis (X) relative to the handle (10).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP17168107.5A EP3395500A1 (en) | 2017-04-26 | 2017-04-26 | Machine tool with adjustable handle assembly |
PCT/EP2018/059823 WO2018197280A1 (en) | 2017-04-26 | 2018-04-18 | Machine tool having adjustable handle assembly |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3615269A1 EP3615269A1 (en) | 2020-03-04 |
EP3615269B1 true EP3615269B1 (en) | 2022-11-30 |
Family
ID=58640701
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP17168107.5A Withdrawn EP3395500A1 (en) | 2017-04-26 | 2017-04-26 | Machine tool with adjustable handle assembly |
EP18723713.6A Active EP3615269B1 (en) | 2017-04-26 | 2018-04-18 | Machine tool with adjustable handle assembly |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP17168107.5A Withdrawn EP3395500A1 (en) | 2017-04-26 | 2017-04-26 | Machine tool with adjustable handle assembly |
Country Status (2)
Country | Link |
---|---|
EP (2) | EP3395500A1 (en) |
WO (1) | WO2018197280A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2023032270A (en) * | 2021-08-26 | 2023-03-09 | 株式会社マキタ | Side handle for power tool and power tool |
JP2023032268A (en) * | 2021-08-26 | 2023-03-09 | 株式会社マキタ | Power tool |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3921752A1 (en) * | 1989-07-01 | 1991-01-17 | Hilti Ag | Angle grinder machine - has detachable handle with spring-loaded ends to clip on to machine |
US6317930B1 (en) * | 1999-06-24 | 2001-11-20 | Mvp (H.K.) Industries Limited | Pivotal device of a handle |
US6499172B1 (en) * | 1999-09-15 | 2002-12-31 | Wmh Tool Group, Inc. | Power tool adjustable handle assembly |
GB2391501B (en) * | 2000-03-10 | 2004-06-02 | Bayly Design Ass Pty Ltd | Power tool |
DE102006055014A1 (en) * | 2006-11-22 | 2008-05-29 | Robert Bosch Gmbh | Additional handle with eccentric clamping lever for a hand tool |
-
2017
- 2017-04-26 EP EP17168107.5A patent/EP3395500A1/en not_active Withdrawn
-
2018
- 2018-04-18 WO PCT/EP2018/059823 patent/WO2018197280A1/en unknown
- 2018-04-18 EP EP18723713.6A patent/EP3615269B1/en active Active
Also Published As
Publication number | Publication date |
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WO2018197280A1 (en) | 2018-11-01 |
EP3395500A1 (en) | 2018-10-31 |
EP3615269A1 (en) | 2020-03-04 |
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