DE102019003733A1 - Hand machine tool - Google Patents

Abstract

The invention relates to a hand machine tool (100), comprising a tool holder (108), in particular a spindle, for holding a work tool (110), a machine part (102) on which the tool holder (108) is arranged, a drive motor (112) ) for driving the tool holder (108), and a guide body (104) for guiding the hand machine tool (100) on a workpiece surface, the machine part (102) being pivotably connected to the guide body (104). In addition, the hand machine tool (100) comprises a depth stop (124, 166) for setting a stop position (154, 190) of the machine part (102) when pivoting relative to the guide body (104), and a stop guide device (106, 158) for guiding the Depth stop (124, 166), wherein the depth stop (124, 166) is arranged on the stop guide device (106, 158) and is designed to be adjustable at a distance from the guide body (104). In addition, the hand machine tool (100) comprises a switching element (126, 168) which is arranged on the depth stop (124, 166), the switching element (126, 168) between a first switching position (128) in which the depth stop ( 124, 166) is displaceable along the stop guide device (106, 158), and a second switching position (142) in which the depth stop (124, 166) is fixed to the stop guide device (106, 158) and the tool holder (108) is in the stop position (154, 190) of the machine part (102) can be locked in a rotationally fixed manner, is designed to be transferable. The invention also relates to a method for changing a work tool (110) of a hand machine tool (100) with the following steps: transferring the machine part (102) to the stop position (154, 190), transferring the switching element (126, 168) to the second switching position (142), and changing the working tool (110).

Description

Technical area

The invention relates to a hand machine tool, comprising a tool holder, in particular a spindle, for holding a working tool, a machine part on which the tool holder is arranged, a drive motor for driving the tool holder, an unlocking switch and a guide body for guiding the hand machine tool a workpiece surface.

It also relates to a method for changing a work tool of a hand machine tool.

State of the art

Such hand machine tools are known in principle in the prior art.

For example, the DE 102013020723 A1 a hand machine tool, in particular a sawing machine, with a tool holder arranged on a machine part for receiving a work tool, in particular a saw blade, and with a particularly electric drive motor for driving the tool holder, the hand machine tool having a guide body, in particular a guide plate, for guidance having a workpiece surface, the machine part with the tool holder being movably supported between a first and at least one second depth position with respect to the guide body by means of a depth adjustment bearing. The hand machine tool has a safety device for securing the movement of the tool holder for a tool change of the working tool, the safety device by means of an actuating element between a safety position in which the safety device mechanically blocks switching on the drive motor and / or the tool holder against a drive by the drive motor , and an operating position in which the drive motor and / or the tool holder are released for working operation of the hand machine tool, the hand machine tool having a holding device with a first holding element for holding, in particular locking, the housing in the first depth position .

The actuation element with the first holding element is coupled in movement in such a way that when the securing device is moved into the securing position with respect to the hold, in particular the latching, it is moved into a release position in the first depth position and thus the machine part with the tool holder from the first depth position into the as Tool change position serving at least one second depth position is adjustable, in which the tool holder is accessible for changing the working tool.

The pamphlet DE 102015015640 A1 describes a machining device having a base with a contact surface adapted to be brought into contact with a workpiece, a machining device main body supported so that it can be moved to and from the base, an electric motor and a A rotary blade adapted to be rotated by the electric motor as a drive source and adapted to be moved to cause the rotary blade to protrude from the contact surface of the base for machining the workpiece, and a stopper which is configured to limit a movable position of the machining device main body towards the base and which has a fine adjustment mechanism which is adapted to allow manual adjustment of the movable position of the machining device main body towards the base.

The known hand machine tools do a good job in their basic function, but are unfortunately relatively complicated, cumbersome and / or expensive to operate. In particular, when changing a work tool, for example a saw blade, a relatively large number of work steps must be carried out and conditions must be met before the work tool can be removed from the hand machine tool.

Presentation of the invention

The object of the invention is to create a hand machine tool which enables simple and efficient operation.

The object is achieved by the features of claim 1. The invention comprises a hand machine tool with a tool holder, in particular a spindle, for holding a work tool, a machine part on which the tool holder is arranged, a drive motor for driving the tool holder, and a guide body for guiding the hand machine tool on a workpiece surface, wherein the machine part is pivotably connected to the guide body, a depth stop for setting a stop position of the machine part when pivoting relative to the guide body, and a stop guide device for guiding the depth stop, the depth stop being arranged on the stop guide device and at a distance from the Guide body is adjustable. In addition, the hand machine tool according to the invention comprises a switching element which is arranged on the depth stop, the switching element between a first switching position in which the depth stop is displaceable along the stop guide device and a second switching position in which the depth stop is fixed to the stop guide device and the Tool holder is rotatably locked in the stop position of the machine part, is designed to be transferable.

As a result, for example, the technical advantage is achieved that the tool holder can be locked in any arbitrarily set stop position of the machine part and thus a simple and quick change of the working tool is possible. In addition, any cutting depth can be checked with a significantly reduced risk of injury, since the tool holder can also be used to lock the working tool in any adjustable position.

In the following, the setting of the stop position means both the setting of the position of the machine part and the setting of a position of the depth stop itself relative to the guide body.

A working tool is to be understood as an object that does not belong permanently to the hand machine tool, which object can be attached to the tool holder and with the aid of which an immediate target of the hand machine tool is achieved. For example, the work tool is designed as a saw blade in order to cut or saw a workpiece.

The drive motor is preferably an electric motor for driving the tool holder and thus the working tool. For example, it can also be operated with a battery.

The guide body is preferably a plate or another body with a flat surface, and at the same time forms a type of base for arranging or attaching the machine part and the stop guide device. The guide body is guided along the workpiece surface when the hand-held machine tool is actuated as intended, the flat surface resting against the workpiece.

The machine part is a component of the hand machine tool that is pivotably connected to the guide body and on which the drive motor and the tool holder are attached. The machine part is connected to the guide body by means of a pivot axis in order to guide the working tool, which is rotatably arranged on the tool holder, onto and into the workpiece.

A depth stop within the meaning of the invention is to be understood as a component that can be adjusted in its position, the set position defining a stop position of the machine part and thereby a cutting depth of the working tool in the workpiece.

The stop guide device is a component carrying the depth stop, along which the depth stop can be guided into a desired position and can be fixed there. The stop guide device is firmly connected to the guide body.

According to a preferred embodiment, the handheld power tool has an unlocking switch for mechanically blocking an on and off switch, the machine part having a locking element which mechanically blocks the unlocking switch when the switching element is transferred to the second switching position and the machine part is in the stop position. In this case, the locking element is preferably designed with a switch-off lever which blocks an unlocking function of the unlocking switch, in particular a latching means to be released for unlocking the unlocking switch. The second switching position of the switching element thus contains a further functionality and makes the operation and handling of the hand machine tool even easier and safer.

According to a particular embodiment, the depth stop has a spring-loaded locking element. The locking element can preferably be unlocked with the aid of a push button. In this way, the machine part can be easily and quickly fixed in its swivel position relative to the guide body. The locking element can also be disengaged very easily by pressing the push button and releasing the locking element against the spring force. The machine part is released.

In addition, the spring-loaded latching element is preferably arranged on the switching element. As a result, a specific, preferably the second, switching position of the switching element is assigned a fixing function for the machine part and thus a further functionality is integrated into the switching element.

According to an additional embodiment, a rotary knob for fine adjustment of the stop position is arranged on the depth stop. By turning the rotary knob, the depth stop can be displaced in a controlled manner by very small distances along the stop guide device and thus a more precise position adjustment of the depth stop can be carried out.

In addition, the rotary knob preferably has a toothed wheel or a worm wheel which is in engagement with a curved toothed rack on the stop guide device. As a result, the rotary knob and rack form a gear or worm gear, which is particularly suitable for fine adjustment. In particular, the worm gear allows a particularly precise fine adjustment of the depth stop.

According to a further embodiment, the depth stop is assigned a spring element in order to clamp the depth stop to the stop guide device with an elastic spring force. The spring element is preferably designed with a leaf spring, the depth stop and the leaf spring preferably being arranged on opposite sides of the stop guide device and connected by means of a connecting element, preferably a screw, passing through the stop guide device. By clamping by the spring element, the depth stop can be easily fixed in a set stop position.

According to the invention, the depth stop is advantageously designed with a grip element, the depth stop being displaceable along the stop guide device against the elastic spring force of the spring element by actuating the grip element. When the grip element is actuated, the depth stop is preferably at least partially spaced from the stop guide device and thereby released from the engagement of the worm wheel or some other non-sliding fixing device. After the stop position has been shifted or readjusted, the depth setting can be fixed again by simply letting go of the grip element. The worm wheel then re-engages with the bent rack. The arrangement of the spring and grip element thus represents a particularly simple and efficient way of setting the stop position for a user.

The depth stop is preferably clamped in both switching positions of the switching element by the spring force of the spring element on the stop guide device. A jamming of the depth stop is preferably ensured with the aid of the aforementioned detent or other non-sliding fixing device. The jamming of the depth stop by the spring force takes place during initial assembly or immediately after the stop position of the depth stop is set, that is to say while the switching element is in the first switching position. When the switching element is or has been transferred to the second switching position, the depth stop remains jammed in the same way on the stop guide device. The advantages of jamming or clamping with the aid of the spring element listed above also apply here.

According to a particular embodiment, the switching element can be transferred into a third switching position, which is arranged between the first switching position and the second switching position, the depth stop being fixed in the third switching position on the stop guide device. The third shift position forms a functional intermediate stage between the first and second shift positions. In a preferred exemplary embodiment for this, in the third switching position, on the one hand, the depth stop is no longer displaceable along the stop guide device - as in the first switching position - and, on the other hand, the tool holder is not yet locked in the stop position of the machine part in a rotationally fixed manner - as in the second switching position. Due to the third switching position, a clearly visible and unambiguous gradation of the functionalities of the switching element is realized. The third switching position corresponds, for example, to the operating position. Here the switching element is fixed on the stop guide device, whereby the machine part can be brought into the stop position and the entire hand machine tool can be operated.

According to a further embodiment, the machine part has at least one locking element which can be transferred into a locking position by means of the switching element and at least one adjusting element, in which the tool holder is locked in a rotationally fixed manner. The locking element is preferably arranged in the blocking position when the switching element is transferred into the second switching position and the machine part is arranged in the stop position. A tensile or compressive force acts on the locking element by means of the adjusting element, as a result of which it is transferred into the blocking position. In this way, the tool holder can be locked in place quickly and easily. It should be noted that at least one locking element is involved here. It is therefore also possible that, for example, two locking means are transferred into a combined locking position by means of the adjusting element in order to lock the tool holder.

The adjusting element is preferably designed here as a magnet or a compression spring. The magnet is preferably designed as a permanent magnet. The compression spring is preferably fastened to a bolt and designed to press a latching means onto the locking element. However, other configurations of the adjusting element are also possible.

According to a further embodiment, the machine part has a projection which can be brought into engagement with the depth stop in order to move the machine part in the To hold the stop position. The projection is preferably arranged on the machine part in such a way that when the machine part is pivoted into the stop position, it is first guided past the switching element and then strikes the depth stop. The machine part can then be fixed, for example, in that the switching element is or is transferred to the second switching position, thereby forming or bringing about a barrier which blocks the machine part from pivoting back from the stop position. Particularly preferably, however, the projection is arranged pivotably or displaceably on the machine part and is designed to be spring-loaded. As a result, the projection engages under the depth stop or in an opening in the depth stop as soon as the machine part has reached the stop position. In this way, the machine part can be easily, quickly and safely fixed in its pivoted position relative to the guide body.

With regard to a further aspect of the present invention, the object is achieved by a method for changing a work tool of a hand machine tool according to one of the preceding embodiments. Accordingly, the method comprises the steps of moving the machine part into the stop position, moving the switching element into the second switching position, and changing the work tool.

The advantages of the method according to the invention correspond in a similar form to the advantages of the hand machine tool according to the invention, whereby, for example, the tool holder can be locked in any stop position of the machine part and thus a simple and quick change of the working tool is possible.

According to a particular embodiment, when the switching element is transferred into the second switching position, the tool holder is locked in a rotationally fixed manner, a locking element being moved by means of an adjusting element into a position that locks the tool holder in a rotationally fixed manner. As already mentioned, the locking of the tool holder is particularly simple and quick in this way, with particular consideration being given to safety aspects.

Further advantageous embodiments and combinations of features of the invention emerge from the following detailed description and the entirety of the claims.

Figure list

• 1 eine erste Seitenansicht einer ersten Ausführungsform einer erfindungsgemäßen Hand-Werkzeugmaschine in einer Ausgangseinstellung,
• 2a das Detail II gemäß 1 mit einem Schaltelement in einer ersten Schaltposition,
• 2b das Detail II gemäß 1 mit dem Schaltelement in einer zweiten Schaltposition,
• 3 das Detail III gemäß 1,
• 4 die Hand-Werkzeugmaschine aus 1 in einer Arbeitswerkzeug-Wechseleinstellung,
• 5 das Detail V gemäß 4,
• 6 eine erste Seitenansicht einer zweiten Ausführungsform einer erfindungsgemäßen Hand-Werkzeugmaschine in einer Ausgangseinstellung,
• 7a das Detail VII gemäß 6 mit einem Schaltelement in einer ersten Schaltposition,
• 7b das Detail VII gemäß 6 mit dem Schaltelement in einer dritten Schaltposition,
• 7c das Detail VII gemäß 6 mit dem Schaltelement in einer zweiten Schaltposition,
• 8 das Detail VIII gemäß 6,
• 9 die Hand-Werkzeugmaschine aus 6 in einer Arbeitswerkzeug-Wechseleinstellung,
• 10 das Detail X gemäß 9 in einer Längsschnitt-Darstellung,
• 11 eine zweite Seitenansicht der erfindungsgemäßen Hand-Werkzeugmaschine gemäß 1 oder 6,
• 12 eine schematische Rückseiten-Teilansicht einer erfindungsgemäßen Anschlagführungseinrichtung aus 1, und
• 13 eine schematische Rückseiten-Teilansicht einer erfindungsgemäßen Anschlagführungseinrichtung aus 6.

The drawings used to explain the exemplary embodiment show:

• 1 a first side view of a first embodiment of a hand machine tool according to the invention in an initial setting,
• 2a the detail II according to 1 with a switching element in a first switching position,
• 2 B the detail II according to 1 with the switching element in a second switching position,
• 3 the detail III according to 1 ,
• 4th the hand machine tool off 1 in a work tool change setting,
• 5 the detail V according to 4th ,
• 6th a first side view of a second embodiment of a hand machine tool according to the invention in an initial setting,
• 7a the detail VII according to 6th with a switching element in a first switching position,
• 7b the detail VII according to 6th with the switching element in a third switching position,
• 7c the detail VII according to 6th with the switching element in a second switching position,
• 8th the detail VIII according to 6th ,
• 9 the hand machine tool off 6th in a work tool change setting,
• 10 the detail X according to 9 in a longitudinal section,
• 11 a second side view of the hand machine tool according to the invention according to 1 or 6th ,
• 12 a schematic rear partial view of a stop guide device according to the invention 1 , and
• 13 a schematic rear partial view of a stop guide device according to the invention 6th .

In principle, the same parts are provided with the same reference symbols in the figures.

Ways of Carrying Out the Invention

The 1 shows a hand machine tool 100 in a first embodiment and in an initial setting. The hand machine tool 100 includes a machine part 102 , a guide body 104 and a fence guide 106 on. This includes the machine part 102 a tool holder 108 with a recorded work tool 110 , here a spindle with a saw blade, and a drive motor - not shown here 112 for driving the tool holder 108 , and an unlock switch 114 to the mechanical blocking of the on / off switch. In addition, is on the machine part 102 between tool holder 108 and the stop guide device 106 a locking mechanism 116 arranged, which will be described in more detail later. The machine part 102 is with the guide body 104 by means of a pivot axis 118 pivotally connected. On the guide body 104 is the stop guide device 106 firmly arranged. The stop guide device 106 includes a curved rack 120 and a lead gap 122 , at which a depth stop 124 Is slidably arranged. The depth stop 124 has a switching element 126 on, which is here in a first switching position 128 and is described in more detail below.

The hand machine tool 100 the first embodiment is ready for operation in the initial setting shown, because the depth stop 124 is already fixed here. Thus the machine part 102 around the pivot axis 118 in the direction of the guide body 104 be swiveled until the machine part 102 at the depth stop 124 strikes. Then the on and off switch of the drive motor 112 by means of the unlocking switch 114 be mechanically unlocked and the hand machine tool 100 by means of the guide body 104 be guided over a workpiece surface.

The 2a shows the depth stop 124 out 1 with the switching element 126 in a first switching position 128 . For better clarity are here and in the following 2 B also the rack 120 and the lead gap 122 the stop guide device 106 shown in a partial view. Next to the switching element 126 indicates the depth stop 124 a rotary knob 130 connected to a worm wheel - not visible here 132 , a handle element 134 , here in the form of a pull lever, and a - not visible here - spring element 136, here in the form of a leaf spring. The spring element 136 is behind the stop guide device 106 arranged and with the depth stop 124 through the leadership gap 122 connected through, shown in 12 . On the switching element 126 is also a push button 138 arranged, which with a - not visible here - spring-loaded locking element 140 is coupled, which is also here on the switching element 126 is arranged.

At the first switch position 128 of the switching element 126 is the depth stop 124 by means of a spring force of the spring element 136 on the stop guide device 106 clamped and thereby fixed in its position, supported by the in the rack 120 engaging worm wheel 132 . By pressing or pulling the handle element 134 is the depth stop 124 against the spring force of the spring element 136 along the stop guide device 106 , more precisely along the guide gap 122 , movable. The worm wheel 132 is off the rack 120 released or disengaged. The depth stop is at a desired position 124 by letting go of the handle element 134 fixable. By turning the rotary knob 130 can then fine-tune the position of the depth stop 124 be made. The fine adjustment is by means of the rotary knob 130 connected worm wheel 132 possible, which together with the rack 120 a worm gear train. On the function of the push button 138 and the spring-loaded locking element 140 will be received later.

The 2 B shows the depth stop 124 out 1 with the switching element 126 in a second switching position 142 . Apart from the switch position 142 resembles the depth stop 124 here in 2 B the in 2a . At the second switch position 142 of the switching element 126 is the depth stop 124 fixed in its position and no longer displaceable or by means of the rotary knob 130 adjustable. Further effects of the second switch position 142 are in the descriptions too 4th and 5 executed.

The 3 shows the locking mechanism 116 out 1 in an initial setting in which the locking mechanism 116 an adjustment element 144 , designed here as a compression spring, and a first locking element 146 and a second locking element 148 includes. Here is the first locking element 146 as a rotary locking element and the second locking element 148 than one on the tool holder 108 attached locking disc formed. In addition, in 3 a head start 150 and a shut-off lever 152 visible to which later in the description too 10 is yet to be received.

The 4th shows the hand machine tool 100 out 1 in a work tool change setting. The components shown correspond completely to those in 1 . However, this is in here 4th illustrated work tool change setting characterized in that the switching element 126 in the second switching position 142 is, as already in 2 B shown, and that the machine part 102 in a stop position 154 is led. In the stop position 154 the machine part lies 102 at the depth stop 124 which creates a depth of cut for the working tool 110 is defined. For changing the work tool 110 must be the switching element 126 necessarily in the second switching position 142 because only then the tool holder 108 and thus also the work tool 110 is locked against rotation. The corresponding locking mechanism 116 in the work tool change setting is described in more detail below.

The 5 shows the locking mechanism 116 out 4th in the work tool change setting. A partial view of the depth stop is shown 124 with the switching element 126 in the second switching position 142 , the adjustment element 144 , as well as the two locking elements 146 and 148 . The switching element 126 is here on the adjusting element designed as a compression spring 144 on, causing this in the direction of the first locking element 146 is pressed. As a result, the first locking element is designed as a rotary locking element 146 with the second locking element designed as a locking disk 148 locked, and the tool holder 108 thus locked against rotation. In addition, in 5 the one on the switching element 126 arranged push button 138 shown, which with the - not visible - spring-loaded locking element 140 is coupled.

The 6th shows a hand machine tool 100 in a second embodiment and in an initial setting. The hand machine tool 100 resembles the hand machine tool 100 according to 1 , and also has a machine part 102 , a guide body 104 and an - albeit different - stop guide device 158. Also a tool holder 108 , a - not shown here - work tool 110 , a drive motor 112 , an unlock switch 114 , a - albeit different - locking mechanism 160 and a pivot axis 118 are included again. As already indicated, the hand machine tool differs 100 in here in 6th illustrated second embodiment in the structure of the stop guide device 158 and the locking mechanism 160 from the first embodiment.

The stop guide device 158 includes a rack 162 , which in a guide gap 164 is integrated. On the rack 162 and the lead gap 164 is a depth stop 166 slidably arranged, which is a switching element 168 has, which is here in the first switching position 128 is located. On the depth stop 166 will be discussed in more detail below. Also the locking mechanism 160 will be described in more detail later.

The hand machine tool 100 the second embodiment in the initial setting shown is not yet ready for operation because the depth stop 166 is in the first switching position 128 of the switching element 168 not fixed yet. The reference number of the first switching position 128 is retained through the entire description of the figures, since the switching position 128 represents a basic switching element starting position in all embodiments.

The 7a shows the depth stop 166 out 6th with the switching element 168 in the first switching position 128 . For better clarity are here and in the following 7b and 7c also part of the rack 162 and the leadership gap 164 the stop guide device 158 shown. Next to the switching element 168 indicates the depth stop 166 a rotary knob 170 connected to a gear wheel - not yet visible here 172 , and one in the lead gap 164 Guidably arranged - here not yet visible - guide element 174 on. The switching element 168 itself also has an adjusting element 176 on, which is designed here as a magnet and in the switching element 168 is arranged inserted.

At the first switch position 128 of the switching element 168 is the depth stop 166 along the stop guide device 158 , more precisely along the guide gap 164 , movable. An adjustment and a fine adjustment of the position of the depth stop 166 can also be done by turning the rotary knob 170 be made. The setting is made using the rotary knob 170 connected gear 172 which together with the rack 162 a gear train forms, realized.

The 7b shows the depth stop 166 out 6th with the switching element 168 in a third switching position 178 . The term “third” switching position, which can be misunderstood 178 is to be understood here as a switching element intermediate position. Apart from this switch position 178 resembles the depth stop 166 here in 7b the in 7a .

In the third switch position 176 or the switching element intermediate position of the switching element 168 is the depth stop 166 in its set position on the stop guide device 158 fixed and can no longer be moved or by means of the rotary knob 170 adjustable. A fixation of the depth stop 166 takes place by pulling the guide element 174 when switching the switching element 168 from the first switching position 128 into the third switching position 178 , whereby the guide element 174 in the leadership gap 164 is fixed. On the fixation of the depth stop 166 is again in the description too 13 received.

The 7c shows the depth stop 166 out 6th with the switching element 168 in the second switching position 142 . The reference number of the second switching position 142 is retained through the entire description of the figures, since the switching position 142 represents a basic switching element end position in all embodiments. Apart from the Switching position 142 resembles the depth stop 166 here in 7c the in the 7a and 7b .

At the second switch position 142 of the switching element 168 is the depth stop 158 continued to be fixed as for 7b already described. In addition, there is now the adjustment element 176 for use. The effect of the adjustment element 176 as well as other effects of the second switching position 142 are in the descriptions too 9 and 10 listed.

The 8th shows the locking mechanism 160 out 6th in the initial setting, which has a locking element 180 includes. The locking element 180 is related to the tool holder 108 radially displaceable and has a gate opening 182 in which the tool holder 108 is arranged passed through. The backdrop opening 182 is in a wide opening section 184 and a narrow opening portion 186 structured. In the initial setting of the locking mechanism shown here 160 is the tool holder 108 in the wide opening portion 184 arranged freely rotatable. The locking element 180 also has an effective range 188 which contains a material that is attractive to magnetism. Alternatively, however, the entire locking element can also be used 180 be made of such a magnetic material as iron, cobalt or nickel. In addition, in 8th the - already in 3 designated - shut-off lever 152 visible, which will be discussed later.

The 9 shows the hand machine tool 100 out 6th in a work tool change setting. The components shown correspond completely to those in 6th . However, this is in here 9 illustrated work tool change setting characterized in that the switching element 168 in the second switching position 142 is located, as in 7c shown, and that the machine part 102 in a stop position 190 is led.

In the stop position 190 the machine part lies 102 at the depth stop 166 which creates a depth of cut for the working tool 110 is defined. For changing the work tool 110 must be the switching element 168 necessarily in the second switching position 142 because only then the tool holder 108 and thus the work tool 110 is locked against rotation. The corresponding locking mechanism 160 in the work tool change setting is in the description to 10 explained.

Both in the second embodiment shown here and in the in 1 and 4th illustrated first embodiment, has the hand machine tool 100 a locking mechanism 192 on, of which only the associated switch-off lever here 152 is visible. On the locking mechanism 192 will be in the description too 10 received.

The 10 shows the locking mechanism 160 and the locking mechanism 192 out 9 in the work tool change setting. The locking mechanism 192 is here due to the representation of a longitudinal section of the machine part 102 visible. In addition, here is in 10 the - already in 3 designated - projection 150 visible on which following the description of the locking mechanism 160 and the locking mechanism 192 is received.

The adjustment element 176 , which in the switching element 168 is arranged and designed as a magnet, lies on the effective area 188 of the locking element 180 at. Due to a magnetic force of attraction between the adjustment element 176 and the effective range 188 become the switching element 168 and the locking element 180 held together. The locking element 180 is therefore in a position that has been shifted to the initial setting, so that the tool holder 108 now in the narrow opening section 186 the backdrop opening 182 is arranged and thus locked in a rotationally fixed manner.

The locking mechanism 192 includes the shut-off lever 152 , which is also in 3 and 8th is shown and labeled. In the work tool change setting shown here, in which the switching element 168 in the second switching position 142 located and the machine part 102 in a stop position 190 to the depth stop 166 is guided, the switch-off lever is located 152 on the switching element 168 or on the one with the switching element 168 connected adjusting element 176 at. Here is the shut-off lever 152 towards the machine part 102 arranged shifted to the initial setting, whereby a sliding element 194 and a transmission unit 196 a locking element 198 is fixed. One by means of the unlocking switch 114 safety device to be operated 200 with an unlocking function or unlocking function is due to the fixed locking element 198 blocked.

The lead 150 fixes the machine part 102 in its stop position 190 , provided the switching element 168 is like here in the second switching position 142 set. Because the lead 150 thus below the switching element 168 is arranged, forms the switching element 168 a barrier which prevents the machine part from pivoting back 102 from the stop position 190 blocked.

The 11 shows the hand machine tool 100 out 1 or 6th from an in 1 or 6th remote side. Since this is both the first embodiment and the second embodiment of the hand machine tool 100 can act, identical designations or reference symbols are only given in both embodiments. The machine part is shown again 102 , the guide body 104 , the tool holder 108 , the working tool 110 , as well as the release switch 114 . In addition, here is in 11 a protective housing 202 with a mounting opening 204 shown. The assembly opening 204 is shown here rather small, but can extend over an entire swivel radius 206 the tool holder 108 extend so the working tool 110 in every position of the machine part 102 is changeable.

As additions to the two embodiments described are in the 12 and 13 Rear partial views of the respective stop guide devices 106 , 158 shown.

The 12 shows a partial rear view of the fence guide device 106 out 1 . You can see the leadership gap 122 , the depth stop 124 and the spring element designed as a leaf spring 136 . The spring element 136 is here in 12 Visible for the first time as it is on the back of the fence guide device 106 is arranged. Here are the depth stop 124 and the spring element 136 on opposite sides of the stop guide device 106 arranged and by means of a through the guide gap 122 connecting element passing through 208 , here a screw. By means of the spring force of the spring element 136 becomes the depth stop 126 in a set position on the stop guide device 106 held. That into the rack 120 engaging worm wheel 132 additionally supports this.

The 13 shows a partial rear view of the fence guide device 158 out 6th . You can see the rack 162 , the leadership gap 164 and the depth stop 166 . In addition, are the gear 172 and the guide element 174 and here in 13 visible for the first time. Inside the stop guide device 158 and from the lead gap 164 outgoing are a first guide groove 210 and a second guide groove 212 arranged, by means of which the guide element 174 along the guide gap 164 is feasible.

The gear 172 forms, as already mentioned, with the rack 162 a gear drive for setting the position of the depth stop 166 . The guide element 174 ensures that the depth stop is guided 166 along the guide gap 164 . In addition, the guide element carries 174 to a possible fixation of the depth stop 166 on the stop guide device 158 at. When the depth stop is transferred to a setting that deviates from the initial setting, for example to the work tool change setting, the guide element becomes 174 to the depth stop 166 used. As a result, the guide element is on the inner walls of the guide grooves 210 , 212 firmly applied, and the depth stop 166 thus fixed in position.

In summary, it can be stated that the embodiments of the hand machine tool according to the invention can be combined with one another. None of the features disclosed excludes the combination with another feature and individual feature combinations interact with one another and form synergetic effects.

List of reference symbols

100

Hand machine tool

102

Machine part

104

Guide body

106

Stop guide device

108

Tool holder

110

Work tool

112

Drive motor

114

Release switch

116

Locking mechanism

118

Swivel axis

120

Rack

122

Leadership gap

124

Depth stop

126

Switching element

128

first switching position

130

Knob

132

Worm wheel

134

Handle element

136

Spring element

138

Push button

140

spring-loaded locking element

142

second switching position

144

Adjustment element

146

first locking element

148

second locking element

150

head Start

152

Shut-off lever

154

Stop position

158

Stop guide device

160

Locking mechanism

162

Rack

164

Leadership gap

166

Depth stop

168

Switching element

170

Knob

172

gear

174

Guide element

176

Adjustment element

178

third switch position

180

Locking element

182

Backdrop opening

184

wide opening section

186

narrow opening section

188

Effective range

190

Stop position

192

Locking mechanism

194

Sliding element

196

Transmission unit

198

Locking element

200

Protection scheme

202

Protective housing

204

Assembly opening

206

Swing radius

208

Connecting element

210

Guide groove

212

Guide groove

QUOTES INCLUDED IN THE DESCRIPTION

This list of the documents listed by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent literature cited

• DE 102013020723 A1 [0004]
• DE 102015015640 A1 [0006]

Claims (15)

A hand machine tool (100) comprising a tool holder (108), in particular a spindle, for holding a work tool (110), a machine part (102) on which the tool holder (108) is arranged, a drive motor (112) for driving the tool holder (108), a guide body (104) for guiding the hand machine tool (100) on a workpiece surface, wherein the machine part (102) is pivotably connected to the guide body (104), a depth stop (124, 166) for setting a stop position (154, 190) of the machine part (102) when pivoting relative to the guide body (104), a stop guide device (106, 158) for guiding the depth stop (124, 166), wherein the depth stop (124, 166) is arranged on the stop guide device (106, 158) and is adjustable at a distance from the guide body (104), a switching element (126, 168) which is arranged on the depth stop (124, 166), wherein the switching element (126, 168) between a first switching position (128) in which the depth stop (124, 166) along the stop guide device (106 , 158) is displaceable, and a second switching position (142) in which the depth stop (124, 166) is fixed to the stop guide device (106, 158) and the tool holder (108) is in the stop position (154, 190) of the machine part (102 ) is non-rotatably lockable, is designed to be transferable. Hand machine tool (100) according to Claim 1 , characterized in that the handheld power tool (100) has an unlocking switch (114) for mechanically blocking an on and off switch, the machine part (102) having a locking element (198) which mechanically blocks the unlocking switch (114) when the switching element (126, 168) transferred into the second switching position (142) and the machine part is arranged in the stop position (154, 190). Hand machine tool (100) according to one of the preceding claims, characterized in that the depth stop (124, 166) has a spring-loaded latching element (140). Hand machine tool (100) according to one of the preceding claims, characterized in that the spring-loaded latching element (140) is arranged on the switching element (126, 168). Hand machine tool (100) according to one of the preceding claims, characterized in that a rotary knob (130, 170) for fine adjustment of the stop position (154, 190) is arranged on the depth stop (124, 166). Hand machine tool (100) according to Claim 5 , characterized in that the rotary knob (130, 170) has a toothed wheel (172) or a worm wheel (132) which engages with a curved toothed rack (120, 162) on the stop guide device (106, 158). Hand machine tool (100) according to one of the preceding claims, characterized in that a spring element (136) is assigned to the depth stop (124, 166) in order to move the depth stop (124, 166) on the stop guide device (106, 158) with an elastic To clamp spring force. Hand machine tool (100) according to Claim 7 , characterized in that the depth stop (124, 166) is formed with a grip element (134), the depth stop (124, 166) by actuating the grip element (134) against the elastic spring force of the spring element (136) along the stop guide device (106) , 158) can be moved. Hand machine tool (100) according to Claim 7 or 8th , characterized in that the depth stop (124, 166) is clamped in both switching positions (128, 142) of the switching element (126, 168) by the spring force of the spring element (136) on the stop guide device (106, 158). Hand machine tool (100) according to one of the Claims 1 to 6th , characterized in that the switching element (126, 168) can be transferred to a third switching position (178) which is arranged between the first switching position (128) and the second switching position (142), the depth stop (124, 166) in the third switching position (178) is fixed on the stop guide device (106, 158). Hand machine tool (100) according to one of the preceding claims, characterized in that the machine part (102) has at least one locking element (146, 148, 180), which by means of the switching element (126, 168) and at least one adjusting element (144, 176 ) can be transferred into a blocking position in which the tool holder (108) is locked in a rotationally fixed manner. Hand machine tool (100) according to Claim 11 , characterized in that the adjusting element (144, 176) is designed as a magnet or a compression spring. Hand machine tool (100) according to one of the preceding claims, characterized in that the machine part (102) has a Has projection (150) which is designed to be engageable with the depth stop (124, 166) in order to hold the machine part (102) in the stop position (154, 190). Method for changing a work tool (110) of a hand machine tool (100) according to one of the Claims 1 to 13 , with the steps: - transferring the machine part (102) into the stop position (154, 190), - transferring the switching element (126, 168) into the second switching position (142), and - changing the working tool (110). Procedure according to Claim 14 , characterized in that when the switching element (126, 168) is transferred into the second switching position (142), the tool holder (108) is locked in a rotationally fixed manner, a locking element (146, 148, 180) being provided by means of an adjusting element (144, 176). is moved into a position that locks the tool holder (108) in a rotationally fixed manner.

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