EP3771536B1 - Hand milling machine - Google Patents

Description

The invention relates to a hand milling machine for machining a surface of a floor or a wall, according to the preamble of claim 1.

Cutting machines within the meaning of this application include machines for milling and are made up of, among other things EP 2 607 036 B1 as well as from EP 1 044 774 B1 known. Such machines are used, for example, to remove adhesive residues or similar residues from concrete or screed.

Also disclosed DE 10 2005 009 284 B3 a hand-held power tool for making incisions, which is characterized in that the drive motor of the hand-held power tool is pivotably arranged with respect to a positioning device, for example a mounting plate, specifically in such a way that at least one pulling position for pulling a cut and at least one sliding position for pushing a cut can be adjusted.

A circular saw, the handle attached to a motor housing is rotatably mounted, describes JP H06 114 804 A .

The EP 1 044 774 B1 discloses a handheld milling machine according to the preamble of claim 1.

The invention is based on the object of proposing a hand-held milling machine that enables better processing of a surface, in particular in corner areas.

The object is achieved by a hand milling machine according to claim 1. Advantageous configurations of such a hand-operated cutting machine are the subject matter of claims 2 to 10.

According to the invention, a hand-held milling machine for machining a surface of a floor or a wall comprises a machine body which has a housing for receiving a tool that can be rotated about a tool axis and a handle attached to the housing for holding the machine body and which defines a working plane to which the tool axis is parallel extends, a guide handle for guiding the cutting machine, which extends inclined at an angle to the working plane and is pivotably mounted on the housing about a pivot axis in order to adjust the angle, and a lock for locking the guide handle relative to the working plane.

The tool is suitable for the respective process and can, for example, be a milling drum that is particularly equipped with monocrystalline or polycrystalline diamond (MKD / PCD).

The tool is attached to the machine body in such a way that it can be driven and rotated. The machine body usually has a housing or a cover in order to avoid reaching into the rotating tool. The housing or the cover are open on at least one side in order to be able to establish contact between the tool located therein and the surface to be processed.

The working plane extends parallel to the tool axis and represents the plane along which the machine is moved during the work process. The working plane can be defined by the geometry of the housing or the cover. In particular, the housing or the cover can have surfaces or edges along which the machine is moved over the surface to be processed.

The handle is used to hold the machine body with one hand, for example the left hand. The guide handle is used to guide the machine along or parallel to the working plane and can be operated with the other hand, especially the right hand. The handle and the guide handle can preferably be ergonomically shaped, that is, they are adapted to the shape of a hand, so that they are comfortable to grip and handle even during prolonged use. This ensures that the machine can be guided precisely along the surface to be processed and at the same time the machine body, which experiences vibrations and shocks due to the work process, can be kept stable.

Because the guide handle can be pivoted relative to the working plane, it is possible to change the angle of the guide handle relative to the working plane. The guide handle is preferably pivotable by approximately 180 °, that is, the angle can be changed by 180 °. The guide handle is particularly preferably completely pivotable, that is to say through 360 °. This is particularly advantageous in corner areas when the machine approaches the floor when machining a wall surface, or when the machine approaches a wall when machining a floor surface. The operator of the machine can then adjust the angle of the guide handle relative to the working plane and pivot the guide handle in a direction facing away from the edge, so that the guide handle does not block the path to the edge. This allows the wall surface or the floor surface to be worked right up to the edge. Edge areas that cannot be processed are minimized compared to known cutting machines.

Due to the pivotability of the guide handle, a change from a pulling operation to a pushing operation of the cutting machine can be achieved by maintaining the regularly unchangeable running direction of the tool, but by pivoting the guide handle about the pivot axis of the angle between the guide handle and the working plane is changed by, for example, about 180 °. A suction device attached to the guide handle can pivot around the working plane with the guide handle so that the suction device is always advantageously placed next to the rotating tool in both pulling and pushing operation in order to reliably suction off the respective material removed.

According to the invention, the lock has a locking body which comprises at least two recesses, and a locking element for interlocking engagement in one of the recesses. Each recess represents a position in which the lock can determine the guide handle relative to the working plane. The higher the number of recess, the higher the number of positions in which the guide handle can be found. The form-fitting connection enables the guide handle to be locked securely and stably so that it does not move automatically during processing.

The hand-operated cutting machine preferably comprises a handle for releasing the locking element from the recess in order to unlock the lock. As a result, the lock can be released by means of an easy-to-use mechanism.

In a preferred embodiment, the handle is arranged in the area of the handle, so that the locking can be released in particular during operation of the machine by means of the hand located on the handle. This makes it possible that the guide handle can be pivoted relative to the working plane without stopping the machine or interrupting the work process.

The lock can preferably have a spring which counteracts an actuation of the handle in order to release the locking element from the recess. By the spring, the lock, after it has been released and released again by the operator, is automatically in the locked position returned to enable safe and stable locking of the guide handle and prevent automatic adjustment.

The recesses are designed as spherical segments, the locking device having a ball for engaging in the recesses. This configuration represents an embodiment according to the invention which is suitable for producing a form-fitting connection, in which the ball can engage in one of the spherical segment-shaped recesses in order to lock the guide handle. The shape of a ball has the particular advantage that it does not tilt when it releases the recess or engages in it.

According to the invention, the lock has a pull rod which comprises a holding element for holding the ball in the recess. The retaining element can in particular be attached coaxially to the tension rod, namely attached to its end or pushed onto it, so that the tension rod extends through the retaining element. The holding element can preferably have a larger circumference or diameter than the tension rod. The holding element is preferably arranged and dimensioned in such a way that it holds the ball in the recess due to its circumference or diameter.

According to the invention, the holding element has a constriction. The constriction is arranged and designed in such a way that it can at least partially accommodate the ball so that it can escape from the recess into the constriction and clear the recess. Furthermore, the holding element is movably mounted by means of the pull rod in such a way that when the pull rod is not actuated, the ball is held in the recess by the holding element and, when the pull rod is actuated, the ball escapes from the recess into the constriction and releases the recess.

According to the invention, the recesses are arranged along a circular path. An arrangement along a circular path corresponds to the pivoting movement of the guide handle and thus enables several options for locking along this circular path. The recesses are preferably distributed at an angle of 160 °, particularly preferably 180 °, along the circular path, so that the guide handle can be fixed over this area by means of the lock. Particularly preferably, the recesses are spaced equally from one another.

In a preferred embodiment, the machine body has a suction opening for suctioning off material and for attaching a suction hose, and the guide handle preferably has a mounting for the articulated mounting of the suction hose. The suction opening can be attached to the housing in that the suction opening for the suction hose, which is connected to a suitable vacuum cleaner, has in the housing wall. The suction hose is attached to the suction opening so that material and dust can be suctioned off immediately during processing. This ensures that the operator is not bothered by abrasion and dust during processing. The suction opening is preferably arranged in such a way that the material removed by the tool is conveyed or flung directly to the suction opening during machining.

In a preferred embodiment, the guide handle can have a drive area in which a drive for the rotatable tool is arranged, and a gripping area which is separate from the drive area and on which a switch button for actuating the drive is preferably arranged. The separate arrangement enables a mass distribution which is conducive to the operability and the pivotability of the guide handle, in that the drive can be arranged close to the pivot axis. In addition, the arrangement of the drive close to the pivot axis ensures a small distance between the drive and the tool. The gripping area can continue from the pivot axis are arranged remotely, so that only small forces are required for pivoting due to the larger lever arm.

The guide handle preferably has ventilation openings, in particular ventilation slots, for the drive, which are arranged in the drive area. The fact that these are arranged in the drive area which is separate from the gripping area prevents the operator from unintentionally covering the ventilation openings during operation, as is often the case with available machines.

The machine body can have an adjusting screw for adjusting a milling depth. The setting can in particular take place continuously. The machine body preferably has markings for reading off the set milling depth. This means that the milling depth of the machine can be read and adjusted at any time.

Fig. 1

eine perspektivische Ansicht einer erfindungsgemäßen, als Handfräsmaschine ausgebildeten Schneidemaschine;

Fig. 2

eine perspektivische Ansicht der Schneidemaschine aus Fig. 1 in Explosionsansicht;

Fig. 3

eine perspektivische Ansicht der Schneidemaschine aus Fig. 1 in Explosionsansicht;

Fig. 4

eine perspektivische Ansicht des Maschinenkörpers und der Arretierung von der Schneidemaschine aus Fig. 1 in Explosionsansicht;

Fig. 5

eine perspektivische Ansicht der Arretierung von der Schneidemaschine aus Fig. 1 in Explosionsansicht;

Fig. 6

eine Explosionsansicht eines Werkzeugträgers, einer Fräswalze und einer Spannmutter;

Fig. 7

eine perspektivische Ansicht eines Werkzeugträgers, einer Fräswalze und einer Spannmutter in teilmontiertem und in montiertem Zustand;

Fig. 8

eine perspektivische Ansicht eines Werkzeugträgers und einer Fräswalze;

Fig. 9

eine perspektivische Ansicht einer nicht erfindungsgemäßen, als Handkreissäge ausgebildeten Schneidemaschine;

Fig. 10

eine weitere perspektivische Ansicht der Schneidemaschine aus Fig. 9; und

Fig. 11

eine perspektivische Ansicht einer weiteren Ausgestaltung der erfindungsgemäßen, als Handfräsmaschine ausgebildeten Schneidemaschine.

The invention is described below using exemplary embodiments. In the drawings shows:

Fig. 1

a perspective view of a cutting machine according to the invention, designed as a hand milling machine;

Fig. 2

a perspective view of the cutting machine Fig. 1 in exploded view;

Fig. 3

a perspective view of the cutting machine Fig. 1 in exploded view;

Fig. 4

a perspective view of the machine body and the lock from the cutting machine Fig. 1 in exploded view;

Fig. 5

a perspective view of the lock from the cutting machine Fig. 1 in exploded view;

Fig. 6

an exploded view of a tool carrier, a milling drum and a clamping nut;

Fig. 7

a perspective view of a tool carrier, a milling drum and a clamping nut in partially assembled and in the assembled state;

Fig. 8

a perspective view of a tool carrier and a milling drum;

Fig. 9

a perspective view of a not according to the invention, designed as a circular saw cutting machine;

Fig. 10

another perspective view of the cutting machine Fig. 9 ; and

Fig. 11

a perspective view of a further embodiment of the cutting machine according to the invention, designed as a hand milling machine.

Figs. 1 to 3 and Fig. 11 show perspective views of a cutting machine, which is designed as a hand-held milling machine 100 for processing a surface of a floor or a wall, and Figures 9 and 10 show perspective views of a cutting machine not according to the invention, which is designed as a hand-held circular saw 200. The machines 100, 200 each have a machine body 10, 110.

The hand milling machine 100 according to Figs. 1 to 3 and Fig. 11 comprises a housing 11 in which a tool 60, in particular in Fig. 3 and 6 to 8 clearly shown and rotatable about a tool axis Aw milling drum is added. A handle 12 for holding the machine body 10 is attached to the housing 11. The housing 11 defines a working plane E _A , to which the tool axis Aw extends parallel. The hand-held milling machine 100 also has a guide handle 20 with which the hand-held milling machine 100 is guided, which extends inclined at a variable angle α to the working plane E _A and is mounted on the housing 11 so as to be pivotable about a pivot axis As. By means of the pivotable mounting, the guide handle 20 can be pivoted relative to the housing, and thus to the working _{plane E A} , in order to set the angle α. Furthermore, the hand-held milling machine 100 comprises a locking device 30 for fixing the guide handle 20 relative to the working plane E _A.

The hand-held milling machine 100 also includes an in particular in Fig. 3 and 6 to 8 shown tool carrier 40, on which the tool 60 designed as a milling drum is received. The tool carrier 40 extends along the tool axis Aw.

Also on the machine body 110 of the circular saw 200 according to FIG Figures 9 and 10 a tool 160, a cutting disk, rotatable about a tool axis Aw is received. A handle 112 for holding the machine body 110 is attached to the machine body 110. The tool axis Aw extends parallel to a working plane E _A. The circular saw 200 also has a guide handle 120 for guiding the circular saw 200. The guide handle 120 extends at an angle α inclined to the working plane E _A and is mounted on the machine body 110 so as to be pivotable about a pivot axis A _{S in order to set the angle α.} Furthermore, the circular saw 200 comprises a locking device 130 for fixing the guide handle 120 relative to the working plane E _A.

The tools 60, 160 are each attached to the machine bodies 10, 110 in such a way that a drive can drive them and they can rotate about the tool axis Aw. The hand milling machine 100 according to Fig. 1 shows also an adjusting screw 14 to adjust a milling depth steplessly. For this purpose, the adjusting screw 14 is connected to a threaded rod 19 which can be moved along an internal thread provided on the housing 11 perpendicular to the tool axis Aw in order to adjust the milling depth. Markings 15, which are used to read off the set milling depth, are attached to the housing 11. In order to accommodate the drive, the guide handles 20, 120 each have a drive area 22, 122. In addition, the guide handles 20, 120 each have a gripping area 23, 123 separated from the drive area 22, 122. The drive is arranged in the drive area 22, 122. A switch button 24, by means of which the drive can be actuated, is arranged on the gripping area 23, 123. The drive area 22, 122 is arranged closer to the pivot axis As than the gripping area 23, 123, so that the mass of the guide handle 20, 120 and the drive is distributed in such a way that the guide handle 20, 120 can be easily operated and pivoted. In addition, this causes the drive to be arranged close to the pivot axis As, which results in a small distance between the drive and the tool 60, 160. The guide handle 20, 120 also has ventilation openings 25 for the drive, which are designed as ventilation slots. These are arranged in the drive area 22, 122 in order to avoid that operators unintentionally cover the ventilation openings 25 during operation.

The housing 11 comprises a suction opening 13 to which a suction hose can be attached in order to suction off any material and dust that arise during operation. The guide handle 20 has in the embodiment according to Fig. 11 a bearing 21 on which the suction hose can be articulated. The storage 21 is an optional design that can be provided depending on the routing of the hose. The suction opening 13 is arranged at a point on the housing 11 to which any material removed by the tool 60 during machining is conveyed or flung. This enables a quick suction, with which there is no great burden from abrasion or dust.

The handle 12, 112 is used to hold the machine body 10, 110 with one hand, in particular the left hand. The guide handle 20, 120 is used to guide the machine 100, 200 along or parallel to the working plane E _A and can be operated with the other hand, in particular the right hand. Both the handle 12 and the guide handle 20 of the hand-held milling machine 100 according to FIG Figs. 1 to 3 are ergonomically shaped so that they fit the shape of a hand.

As described above, the guide handles 20, 120 are each pivotable _{about the pivot axis A S} relative to the working plane E _A. This makes it possible to change the angle α of the guide handles 20, 120 relative to the working plane E _A. The guide handles 20, 120 can be pivoted through 360 °, that is, the angle α can be changed through 360 °. The pivotability makes it possible that in corner areas, when the machine 100, 200 approaches the floor when working on a wall surface, or when the machine 100, 200 approaches a wall when working on a floor surface, almost the entire corner area with the machine 100 , 200 can be edited. In the embodiment as a hand-held circular saw 200, a suction hose attached to the guide handle 120 pivots (not shown in FIG Figs. 1 to 3 shown) with the guide handle 120 around the working _{plane E A} , so that the suction hose can reliably suck off the respective material removed in both a pulling and a pushing operation.

The locks 30, 130 of the machines 100, 200 each have a locking body 31, 131, in each of which a plurality of recesses 32, 132 are made, such as in particular Fig. 4, 5 and 10 clearly show. In addition, the detents 30, 130 each include a locking element 33, 133 which can engage in the recesses 32, 132. Each recess 32, 132 represents a position in which the locking device 30, 130 can determine the guide handle 20, 120 relative to the working plane E _A.

In the case of the hand-held milling machine 100 according to Figs. 1 to 5 the recesses 32 are formed in the shape of a spherical segment. Accordingly, a ball 36 is for the recesses 32 are provided as a locking element 33. The circular saw 200 has recesses 132 which are designed as blind holes into which a locking element 133 designed as a pull rod 137 can engage. The recesses 32, 132 are each arranged along a circular path at equal distances from one another, so that the pivoting movement of the respective guide handle 20, 120 is mapped. The recesses 32, 132 allow several locking options along this circular path.

The respective locking elements 33, 133 can be released from the recess 32, 132 by means of a handle 34, 134, so that the locking device 30, 130 is unlocked. The handle 34, 134 is arranged in the area of the handle 12, 112 so that the lock 30, 130 can also be released during operation of the machines 100, 200 by means of the hand located on the handle 12, 112. In the case of the circular saw 200, this is done in that the pull rod 137 is connected directly to the handle 134 and is released from the recesses 132 when the handle 134 is actuated.

In the case of the hand-held milling machine 100, this is done by means of a mechanism which is particularly clear Fig. 2 , 4 and 5 It can be seen: The pull rod 37 comprises a holding element 38 which is arranged coaxially to the pull rod 37 and which can hold the ball 36 in one of the recesses 32. The holding element 38 has a larger diameter than the tension rod 37 and a constriction 39. The holding element 38 is arranged such that the ball 36 is held in the recess 32 due to the diameter of the holding element 38. When the pull rod 37 is actuated by means of the handle 34, the holding element 38 is moved such that the ball 36 can escape from the recess 32 into the constriction 39 of the holding element 38. The lock 30 is then released and the guide handle 20, 120 is pivotable _{about the pivot axis A S.} If the tension rod 37 is returned again, the ball 36 becomes the constriction due to the geometry 39 conveyed into a recess 32 so that the catch 30 is locked. Due to the design as a ball 36, it is also ensured that no tilting can occur during locking or unlocking.

In order to return the lock 30, 130 to the locked state when the handle 34, 134 is released and to keep it reliably in this, the locks 30, 130 each have a spring 35, 135. The springs 35, 135 each counteract an actuation of the handle 34, 134.

The in Fig. 3 and 6 to 8 The tool carrier 40 shown has a first end 41 facing the drive, i.e. the guide handle 20, a second end 42 facing away from the drive, a circumferential surface 43 and several connecting elements 44 arranged on the first end 41, by means of which a tool 60 is positively locked in the circumferential direction U can be included. The connecting elements 44 are designed as projections 46 which are arranged along the circumferential direction U and which have the same spacings from one another or are arranged at the same angles to one another. When the hand-held milling machine 100 is in operation, the drive transmits a torque to the tool carrier 40 in order to produce a rotation of the tool carrier 40 in the circumferential direction U.

The tool 60, a milling drum, is fastened to the tool carrier 40 in such a way that it can be driven and rotated in the circumferential direction U by means of the drive and the tool carrier 40. The tool carrier 40 and the tool 60 are arranged coaxially. Here, an inner circumferential surface 63 of the tool 60 rests against the outer circumferential surface 43 of the tool carrier 40. For this purpose and for guiding the tool 60, the outer circumferential surface 43 has at least one first section 51, preferably two or more first sections 51, a second section 52 which has a smaller outer diameter than the first sections 51 and which extends in the circumferential direction U Paragraphs 50 that separate the first sections 51 from the second section 52. The first sections 51 are provided with flat surfaces 53 which extend transversely to the U extend circumferential direction. The flat surfaces 53 are distributed along the circumference of the tool carrier 40 and are attached, for example, by removing material, in particular by milling. The tool 60 is made from a tube and has a first end 61, a second end 62, an outer circumferential surface 64 covered with cutting elements 67 and several connecting elements 65 arranged on the first end 61, which are used to produce a form-fitting connection with the tool carrier 40 serve in the circumferential direction U. The connecting elements 65 are designed as indentations 66 which are arranged along the circumferential direction U and extend in the axial direction of the tool 60 as far as the first end 61. The indentations 66 and the projections 46 correspond to one another, so that in the assembled state the projections 46 engage in the indentations 66 and thus form a positive connection between the tool carrier 40 and the tool 60 in the circumferential direction U. This also ensures that the tool 60 cannot be installed the wrong way round. The cutting elements 67 are usually made of monocrystalline or polycrystalline diamond.

In order to fix the tool 60 in the axial direction, a clamping device 45 is provided with which the tool carrier 40 and the tool 60 can be clamped against the hand milling machine 100 in the direction of the tool axis Aw, i.e. in the axial direction of the tool carrier 40 and the tool 60. The tensioning device 45 has a tensioning screw 47 and a tensioning nut 48 for tightening and loosening the tensioning screw 47. The clamping screw 47 is tightened coaxially to the tool 60 and the tool carrier 40. A clamping plate 68, which is not detachably connected to the tool 60, preferably pressed in, is used for this purpose. In other configurations, the clamping plate 68 can be connected to the tool 60 by means of a thread attached to the clamping plate 68, a fit or by means of grub screws. The clamping plate 68 serves as a platform for the clamping nut 48 by forming a bracing surface 70 for the clamping nut 48, and has a through opening 69 for the Clamping screw 47 open. The clamping screw 47 is guided through the through opening 69 of the clamping plate 68 arranged on the second end 42 of the tool carrier 40 and the tool 60 and is clamped against the clamping plate 68 by means of the clamping nut 48. As a result of this configuration, the tool 60 is securely fixed in the axial direction on the machine 100 and on the tool carrier 40. The pressed-in clamping plate 68 rests against the inner circumference of the tool 60 and seals against the outside, in particular against dust. The clamping plate 68 can also be colored or labeled, for example it can be identified by the manufacturer's name.

The clamping nut 48 has in the embodiment according to Fig. 11 a foldable handle 49 for tightening and loosening the clamping screw 47 without an additional tool, such as a wrench. By means of the handle 49, the clamping nut 48 with the clamping screw 47 can be detached from the tool carrier 40 without tools. The clamping nut 48 has a recess in order to lower the foldable handle 49 therein.

The tool carrier 40 and the tool 60 are received in the housing 11, in particular Fig. 3 clearly shows. The housing 11 has a releasable cover 16 facing the second end 42 of the tool carrier 40, which makes it easier to change the tool 60. The detachable cover 16 of the housing 11 is arranged at the second end 42 of the tool carrier 40 in order to facilitate easy access to the tool 60 and the tool carrier 40 and to enable a quick tool change.

For quick and easy removal of the cover 16, the housing 11 has a guide 17, along which the cover 16 can be pushed into the housing 11 in order to attach the cover 16 to the housing 11. The guide 17 is formed by two guide rails arranged on opposite sides of the housing 11, along which the cover 16 can be pushed. The tour 17 extends at right angles to the working plane E _A, so that the cover 16 is inserted in a right angle to the working plane E _A toward and located away at a right angle from the working plane E _A.

Furthermore, a lock 18 is attached to the housing 11, which is used to hold the cover 16 on the housing 11 and in the guide 17. The lock 18 is rotatably mounted and can be moved manually without tools from a position in which it holds the cover 16 on the housing 11 to a position in which it releases the cover 16, so that the cover 16 from the housing 11 and out the guide 17 can be removed. <b> List of reference symbols </b> 10 Machine body 40 Tool carrier 11 casing 41 first end 12th Grab handle 42 second end 13th Suction opening 43 Circumferential surface 14th Adjusting screw 44 Connecting element 15th mark 45 Bracing device 16 cover 46 head Start 17th guide 47 Clamping screw 18th Locking 48 Clamping nut 19th Threaded rod 49 Handle 50 paragraph 20th Guide handle 51 first section 21 storage 52 second part 22nd Drive range 53 flat surface 23 Gripping area 24 Switch button 60 Tool 25th Ventilation opening 61 first end 62 second end 30th Locking 63 inner peripheral surface 31 Locking body 64 outer peripheral surface 32 Recess 65 Connecting element 33 Locking element 66 indentation 34 Handle 67 Cutting element 35 feather 68 Clamping plate 36 Bullet 69 Through opening 37 Tension rod 70 Bracing surface 38 Retaining element 39 Constriction 100 Hand milling machine 110 Machine body 112 Grab handle 120 Guide handle 122 Drive range 123 Gripping area 130 Locking 131 Locking body 132 Recess 133 Locking element 134 Handle 135 feather 137 Tension rod 160 Tool 200 Circular saw As Swivel axis Aw Tool axis E _A Working level U Circumferential direction α angle

Claims (10)

1. Hand milling machine (100) for machining the surface of a floor or wall, comprising:

   a machine body (10) having a housing (11) for receiving a tool (60) rotatable about a tool axis (A_W), and a holding handle (12) fixed to the housing (11) for holding the machine body (10) and defining a working plane (E_A) to which the tool axis (A_W) extends in parallel;

   a guide handle (20) for guiding the hand milling machine (100), characterized in that the guide handle (20) extends at an angle (α) inclined to the working plane (E_A) and is pivotally mounted on the housing (11) about a pivot axis (A_S) to adjust the angle (α);

   and in that the hand milling machine comprises a locking device (30) for locking the guide handle (20) relative to the working plane (E_A);

   the locking device (30) having a locking body (31) which comprises at least two recesses (32) of spherical segmental shape which are arranged along a circular path and represent positions in which the locking device (30) locks the guide handle (20) relative to the working plane (E_A);

   wherein the detent (30) has a locking element (33) configured for positive engagement in one of the recesses (32) and having the shape of a ball;

   wherein the detent (30) has a pull rod (37) comprising a retaining element (38) configured for retaining the locking element (36) in the recess (32);

   wherein the retaining element (38) has a constriction (39) at least partially receiving the locking element (36);

   and wherein the retaining element (38) is movably mounted by means of the tension rod (37) in such a way that in an unactuated state of the tension rod (37) the locking element (36) is retained in the recess (32) by the retaining element (38) and in an actuated state of the tension rod (37) the locking element (36) escapes from the recess (32) into the constriction (39) and releases the recess (32).
2. Hand milling machine (100) according to claim 1, characterized by a handle (34) actuating the pull rod (37) for releasing the locking element (33) from the recess (32) to unlock the detent (30).
3. Hand milling machine (100) according to claim 2, characterized in that the handle (34) is arranged in the region of the holding handle (12).
4. Hand milling machine (100) according to claim 2 or 3, characterized in that the detent (30) comprises a spring (35) that opposes actuation of the handle (34) to release the locking member (33) from the recess (32).
5. Hand milling machine (100) according to any one of claims 1 to 4, characterized in that the recesses (32) are equidistant from one another.
6. Hand milling machine (100) according to any one of claims 1 to 5, characterized in that the machine body (10) has a suction opening (13) for sucking off material removal and for attaching a suction hose, and in that the guide handle (20) has a bearing (21) for pivotally supporting the suction hose.
7. Hand milling machine (100) according to any one of claims 1 to 6, characterized in that the guide handle (20) comprises a drive portion (22) in which a drive for the rotatable tool (60) is arranged, and a gripping portion (23) which is separate from the drive portion (22) and on which a switching button (24) for actuating the drive is arranged.
8. Hand milling machine (100) according to claim 7, characterized in that the guide handle (20) has ventilation openings (25) for the drive arranged in the drive area (22).
9. Hand milling machine (100) according to one of claims 1 to 8, characterized in that the machine body (10) has an adjusting screw (14) for, in particular, continuously adjustment of a milling depth.
10. Hand milling machine (100) according to claim 9, characterized in that the machine body (10) has markings (15) for reading off the set milling depth.

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