Device for limiting a drilling depth for a drilling machine

Abstract

Device (1) for limiting a drilling depth (BT) for a drilling machine (BM), with - a support device (2) which can be placed in a fixed relative position (R) to a drilling machine (BM) and which defines a longitudinal axis (3), - a limiting body (4) guided on the support device (2) so as to be displaceable relative thereto along the longitudinal axis (3), - a spacer element (5) which is held on the limiting body (4) so ​​as to be displaceable and lockable along the longitudinal axis (3), - a stop body (7) which is held lockably on the support device (2) in at least one position along the longitudinal axis (3), wherein the device (1) is designed to limit a predefined drilling depth (BT) by contact of the limiting body (4) with the stop body (7).

Description

The invention relates to a device for limiting a drilling depth for a drilling machine.Corresponding devices for limiting a drilling depth for a drilling machine are fundamentally known from the prior art. It is thus known, for example, to provide a rod-shaped depth limiter on a handle which can be fastened to a drilling machine as a separate component. This rod-shaped depth limiter is set at a defined distance from a tip of a drill inserted into the drilling machine before a drilling process is carried out with the drilling machine and serves as a stop during the carrying out of the drilling.In the prior art, there are a large number of further devices which can be mounted on a drilling machine and which enable a limitation of the drilling depth of a borehole which is to be created by means of the drilling machine equipped with the device. For example, DE 10 2012 106 909 A1 discloses a device which is configured to display a drilling depth for a drilling machine, wherein the device comprises a holder which can be placed in a fixed position relative to the drilling machine and a measuring body which is guided on the holder such that it can be displaced relative to the latter along an axial direction is provided, and a spacer element which is held on the measuring body such that it can be displaced and locked in the axial direction is used. It is disadvantageous here that the device does not have a compact structure and, in particular, that the device is arranged in the final assembly position on the drilling machine laterally with respect to the drilling machine at the height of the drill chuck, so that use of short drills is not made possible.JP S59-227 306 A describes a drilling aid which allows a drilling depth to be drilled to be set or limited.The invention is based on the object of specifying a device for limiting the drilling depth for a drilling machine, which device has a compact structure and enables the use of short or small drills in the drilling machine. Furthermore, the device should have a structure that is not susceptible to faults and should be able to be produced cost-effectively.The object is achieved by a device for limiting a drilling depth for a drilling machine according to claim 1. The claims dependent on this relate to possible embodiments of the device. The object is furthermore achieved by a method according to claim 17.The invention relates to a device for limiting a drilling depth (BT) for a drilling machine, in particular for a hand-held drilling machine, having a support device which can be placed in a fixed relative position (R) with respect to a drilling machine and defines a longitudinal axis. The support device is fastened or can be fastened indirectly or directly to the drilling machine and carries further elements of the device. On the support device, a delimiting body is arranged or mounted which is guided displaceably relative to the support device along the longitudinal axis of the support device. The delimiting body can be arranged movably on the carrying device, in particular within predetermined limits. Furthermore, the device comprises a spacer element held at least, preferably exclusively, on the delimiting body and held displaceably and lockable along the longitudinal axis. The support of the spacer element can be effected via a support, in particular a direct support, of the spacer element on the delimiting body and / or via a support, in particular a direct support, of the delimiting body on the supporting device. For example, the spacer element is in direct contact with the delimiting body and the delimiting body is in direct contact with the carrying device.A stop body of the device is held or holdable in a lockable manner on the support device, in particular alternately, in at least one first and at least one second position along the longitudinal axis. This means, for example, that the stop body can be fastened to the support device in the first and the at least one second position and the two positions are spaced apart from one another in the longitudinal direction. By contacting the delimiting body with the stop body, a predefined drilling depth can be limited. This means that a penetration depth of a drill of a drilling machine equipped with the device is limited during or during, in particular, direct, contact of the limiting body and the stop body, since the end of the spacer element facing the borehole is brought into contact with the body to be provided with the borehole and a continuing feeding or a further advancing movement of the drilling machine in the direction of the body to be provided with the borehole is prevented. It is possible for the delimiting body to have a locking device 19, e.g. a screw element (e.g. a screw), which is accommodated in a screw element receptacle (e.g. a threaded hole) on the delimiting base body side, wherein the mutual contact for limiting the drilling depth takes place by a contact of the locking device, in particular of the screw element, and the stop body. The screw element can thus perform a dual function, since it serves for fixing the spacer element to the delimiting body and as a contact region or delimiting region for the contact with the stop body.The stop body can be fastened, for example, such that it cannot be lost or can be released on the support device and can be locked. For example, the stop body can be locked on the support device via a locking movement having at least one rotational portion, in particular on a component of the support device embodied as a sleeve body. Preferably, the stop body can be locked on the support device via a movement that carries out only a rotating locking movement relative to the support device. Alternatively or additionally, the stop body can be locked on the support device via a locking connection.In a preferred embodiment, the support device can comprise a sleeve body having a receiving space, wherein the delimiting body and / or the spacer element is or are arranged at least in sections in the receiving space of the sleeve body. The sleeve body can enclose the receiving space at least in sections, preferably predominantly, by means of its circumferential surface. This makes it possible to prevent dirt or dust from entering the receiving space, so that any parts of the device that are located inside the receiving space, in particular movable parts, have increased protection against mechanical environmental influences. The sleeve body can have, for example, the basic shape of a cylinder, in particular of a circular cylinder. It is possible that a base body of the limiting body-limiting base body-is arranged completely within the receiving space of the sleeve body, wherein a locking element (e.g. screw element) of the locking device of the limiting body is connected or connectable to the limiting base body and this locking element reaches through the hole structure or extends at least in sections into a region outside the receiving space.The spacer element can be supported, for example, via the delimiting body and via a (first and / or further) support means which is arranged or formed on a holder and / or on an adapter body. In other words, the spacer element can be supported or movably supported indirectly via the delimiting body and its movable bearing on the sleeve body and via a bearing structure, for example via a sliding bearing contact with a contact surface of the holder and / or of the adapter body, on the further components of the device. For example, the support of the spacer element on the holder and / or on the adapter body is designed as a channel or aperture, in particular a straight channel. In particular, when in the initial position or zero point position of the delimiting body there is a distance between the delimiting body and the holder or the adapter body, a sufficient mounting of the spacer element can be realized by the delimiting body and the holder or the adapter body. The holder can form an integral, i.e. one-piece, component of the drilling machine at least in sections, in particular completely, or can be detachably fastened to the drilling machine at least in sections, preferably completely. For example, a grip element is fastened to the drilling machine by means of the holder. Preferably, the holder or a grip element fastened via the latter to the drilling machine is arranged between a drill chuck and a trigger button for activating the drilling machine.The sleeve body can have a hole structure, for example, wherein the delimiting body reaches through the hole structure at least in sections. In other words, a first section of the delimiting body extends into the receiving space and a further section of the same delimiting body extends into a section lying outside the sleeve body, wherein for this purpose the delimiting body reaches through the hole structure. In other words, the hole structure connects the receiving space of the sleeve body to an outer region of the sleeve body.Optionally, the hole structure can be formed as an elongated hole and have a longitudinal axis which runs parallel to the longitudinal axis of the support device or to the longitudinal axis of the sleeve body. The hole structure can also have a curved extension shape, e.g. be formed spirally or screw-like on the support device.In the receiving space of the sleeve body, for example, a support body can be arranged or formed, which is configured to support the spacer element at least in sections relative to the sleeve body. Due to the fact that the support of the spacer element is effected at least partially, preferably predominantly, particularly preferably exclusively, by the support body arranged in the receiving space, the bearing point can be protected from external influences (e.g. dirt).In a further exemplary embodiment, at least on an end region of the sleeve body, preferably on an end region of the sleeve body facing away from the borehole to be drilled, a further support means can be arranged or formed, which is configured to support the spacer element at least in sections with respect to the sleeve body. Because the further support means is arranged on at least one end region of the sleeve body, the degree of mechanical play can be kept low. The further support means can be arranged, for example, as a separate component, in particular directly, on the sleeve body. For example, the further support means is fastened to the sleeve body by means of a force-fit and / or form-fit and / or material-fit connection. In a preferred embodiment, the further support means can be screwed to the sleeve body via a screw connection comprising a screw thread. For this purpose, for example, the sleeve body can have an external thread and the further support means can have an internal thread corresponding to the external thread. Of course, alternatively, the sleeve body can have an internal thread and the further support means can have an external thread corresponding to the internal thread. Optionally, it is possible for the further support means to be formed as a one-piece component of the sleeve body. For example, the sleeve body is formed from plastic and / or from metal, e.g. from a sheet metal body, wherein the further support means is formed as a materially uniform or one-piece component of the plastic and / or metal forming the sleeve body. For example, the sleeve body has a taper on an end section, similar to a ballpoint pen, wherein a through opening is provided on the end section, through which the spacer element is passed at least in sections. For example, the sleeve body and / or the further support means of the sleeve body at the end is designed as an injection-molded component.It is possible that a first support means is arranged or formed on at least one first end region of the sleeve body and a further support means is arranged or formed on a second end region opposite the first end region, wherein the at least two support means are configured to support the spacer element relative to the sleeve body at least in sections. Because the spacer element is supported at both ends of the sleeve body via a support means, the play in the mounting of the spacer element is reduced to a minimum.In a preferred embodiment, the support device has an adapter which is configured to fasten the device to a depth stop interface of a drilling machine and / or to a depth stop interface of a handle device of a drilling machine. A depth stop of a drilling machine typically consists of a rod-shaped body which has a cross-sectional shape which corresponds to a cross-sectional shape of a depth stop recess of the drilling machine or of a handle device of the drilling machine. In the depth stop recess, the rod-shaped body is mounted movably or displaceably and lockable. Optionally, the handle device can comprise a locking means, by means of which the depth stop, i.e. the rod-shaped body, can be fastened, in particular locked, relative to the handle device. By releasing or removing the depth stop, i.e. the rod-shaped body, from its receiving opening or by exposing the receiving opening of the depth stop, this receiving opening can be used to accommodate an adapter protrusion of the adapter. This adapter protrusion can, for example, penetrate at least in sections into the receiving opening and, in the state penetrated at least in sections, be fixed there by the locking means of the handle device or the drilling machine or by another fixing means. In other words, the receiving opening of the rod-shaped depth stop can be used to move the device described herein, in particular the support device, into a fixed relative position relative to the drilling machine.Optionally, it can be provided that the adapter on the device side has a receiving region which can be fastened with a protrusion of the drilling machine and / or with a protrusion of a handle device which can be fastened to the drilling machine. This means, for example, that a fixing of the support device to the drilling machine and / or to a handle device can be carried out via an, in particular corresponding, contact or a fastening of an adapter-side receiving region to a drill-machine-side and / or handle-device-side protrusion. It is thus possible, for example, for a pin body to be inserted in a receiving recess on the drilling machine side and / or handle device side, which recess is provided for receiving a depth limiter, in particular a commercially available depth limiter, instead of the depth limiter, and for a device-side adapter to be fastenable via this pin body. Alternatively, instead of the depth limiter, a pin body can be inserted into its receiving recess, which is a component of the adapter. In general, the interfaces for a depth limiter, e.g. rod bodies having the shape of a hexagon, which interfaces are held in commercially available gripping devices and / or drilling machines, can thus be used for fastening the device, in particular for fastening an adapter on the device side. This allows retrofitting a commercially available drilling machine with the device described herein in a simple and comfortable manner.It is possible that a biasing means which biases the limiting body into a predefined position relative to the support device. Because the delimiting body is in a predefined position in the externally unaffected state, the setting of a defined relative position between delimiting body, spacer element and drilling machine can be set in a comfortable and simple manner. Furthermore, by prestressing the delimiting body, it is also present in a predefined position relative to the supporting device. Preferably, the pretensioning means pretensions the delimiting body in an end position-i.e. in a defined position predefined at one end of a possible movement path. In other words, an end position means that the delimiting body is positioned at one end of its movement path predefined by adjacent components (e.g. by the support device, in particular by the sleeve body). The biasing means can be designed as an elastic element which biases the delimiting body into a defined position. For example, the prestressing means can be designed as elastomer and / or as spring, e.g. steel spring. The biasing means can be designed, for example, as a compression spring. alternatively or additionally, the biasing means can be designed as a helical spring, i.e. consisting, for example, of a spring wire wound in helical form. Preferably, the biasing means can be designed as a helical tension spring or as a helical compression spring. The support body and / or at least one support means can serve, for example, as an abutment or as an engagement surface for the prestressing means. One end of the pretensioning means can thus abut the further supporting means or the supporting body and the opposite end of the pretensioning means can be in contact with the delimiting body, preferably directly.In an optional embodiment, the biasing means biases the restriction body into a position of the restriction body that faces a wellbore to be drilled during proper operation of a drilling machine equipped with the device. In other words, the delimiting body, in its position pretensioned by the pretensioning means, is in a position facing and / or closest to the borehole to be drilled.Optionally, the prestressing means can be arranged at least in sections, preferably predominantly, particularly preferably completely, in the receiving space. This achieves the effect that the prestressing means is surrounded at least in sections, preferably predominantly, particularly preferably completely, by the sleeve body or has protection against mechanical influences. The pretensioning means can preferably have an elongate shape, wherein a longitudinal axis of the pretensioning means is oriented parallel, in particular coaxial, to a longitudinal axis of the supporting device and / or to a longitudinal axis of the sleeve body and / or to a longitudinal axis of the spacer element.The prestressing means can also define or surround, for example, a cavity in which the spacer element is received or receivable at least in sections. In other words, the prestressing means surrounds the spacer element at least in sections or the spacer element is accommodated in the cavity of the prestressing means so as to be movable at least temporarily. The spacer element can comprise a function stabilizing the biasing means, since the fact that the spacer element is arranged in the cavity of the biasing means reduces the risk of the biasing means buckling, since the biasing means experiences support by the section of the spacer element accommodated in the cavity of the biasing means radially inward in the event of a deformation or buckling of the biasing means. This increases the reliability of the device.Even when the, in particular rod-shaped, spacer element is threaded into the receiving space of the sleeve body, it can be advantageous if at the same time the spacer element inserted into the receiving space is inserted into a cavity of the prestressing means. Since the prestressing means is arranged radially between the spacer element and the sleeve body, the prestressing means can serve as a cross-sectional constriction or as a centring and / or guide element for a spacer element inserted into the receiving space of the sleeve body, in particular until the spacer element experiences support via a support means and / or a support body.The support device, in particular a sleeve body of the support device, can have, for example, a scale which displays drilling depth information with the delimiting body during the intended operation of the device. For this purpose, the delimiting body can comprise a marking, e.g. a pointer, which can output, together with the scale, optically detectable information relating to the penetration depth of the drill and / or the progress of the drilling process during the execution of a drilling process. The scale is preferably arranged at the height or next to the drilling machine, so that reading is facilitated due to the proximity to the eyes of the user of the drilling machine. The scale is preferably arranged on the support device, in particular on the sleeve body. This results in an immovable arrangement of the scale relative to the drilling machine, i.e. no relative movement is carried out between the scale and the drilling machine during the drilling process. This facilitates the ability to read the scale for a person handling the drilling machine, since no relative movement occurs between the scale and the handle of the drilling machine.The support device, in particular the sleeve body, and / or the delimiting body and / or the stop body can be fastened to the drilling machine via an interface of a drilling machine or are fastened accordingly in such a way that the support device, in particular the sleeve body, and / or the delimiting body and / or the stop body are fastened or can be fastened predominantly, preferably exclusively, on a side of the interface facing away from the borehole to be drilled. This can be achieved, for example, by connecting the device to the drilling machine between a motor body of the drilling machine and a chuck of the drilling machine, wherein the support device and / or the sleeve body is or are arranged at least in sections, preferably predominantly, particularly preferably exclusively, on the side of the connecting section facing the motor body and / or on the side of the connecting section facing away from the chuck. The support device, in particular the sleeve body, can be fastened or can be fastened to the drilling machine, for example, in such a way that no overlap or lateral overlap with a drill chuck of the drilling machine occurs. This is connected with the advantage that relatively short and / or thin drills can also be used in a drilling machine equipped with the device, since there is no protrusion of the components of the device which are rigidly to be attached to the drilling machine. This allows a disturbance geometry of the device to be used when small or short drills are used in the drilling machine equipped with the device.For example, the delimiting body can be locked on the spacer element by means of a locking device, wherein the locking device enables a frictional and / or positive locking of the delimiting body, in particular directly, on, e.g. on, the spacer element. The locking device can comprise, for example, at least one spring element which prestresses a locking means of the locking device into a locking position which locks a relative movement between the spacer element and the delimiting body. In other words, in the case of a non-external, e.g. manual, action, the arresting device would prevent or block movability of the spacer element relative to the delimiting body. The locking device can have a screw, for example, so that by screwing or loosening the screw, it is possible to switch between a release position and a locking position for a relative movement of spacer element and delimiting body. The screw can also have a handle (e.g. a wing screw or the like), so that the screw can be moved between the release and the locking position without tools. It is also possible for the locking device to comprise a mechanical switch or a mechanical button which, in the course of manual actuation, enables a mechanical changeover between the release and blocking positions.Optionally, the device can comprise a mounting body which is arranged or arrangeable on the spacer element, wherein the mounting body can be placed flat on a drill material. alternatively or additionally, the device can comprise a dust collector having (a) a machine coupling which can be mounted close to the drilling machine and the distance of which from the mounting body can be varied, and (b) an outer casing which is connected or connectable in a sealing manner to the machine coupling and the mounting body, and (c) a drill chuck casing which is arranged within the outer casing and is mounted in a sealing manner on the machine coupling and has a drill opening. Such a structure prevents the dust formed during the drilling process from being dispersed to and from the borehole.The delimiting body can be mounted, for example, such that it slides on, in particular in, the carrying device, in particular in a receiving space of a carrying device comprising a sleeve body. This allows the spacer element to be mounted at least partially and / or at least temporarily via the contact of the spacer element with the delimiting body and contact of the delimiting body with the support device, in particular with the sleeve body.The delimiting body and / or the stop body can be movably mounted on the carrying device in a captive manner, for example. Alternatively or additionally, the spacer element can be arranged captive on the support device, preferably on a support device designed as a sleeve body. The captive securing of the spacer element is preferably designed such that the spacer element is secured captive in the state in which it is movable relative to the support device, in particular relative to the sleeve body. Thus, the spacer element can have, for example, a protrusion running perpendicular to its longitudinal axis, which prevents the spacer element from threading through at least one opening for passing through the spacer element on at least one support means and / or a support body. In other words, the protrusion forms a movement limiter for the movability of the spacer element relative to the support device. The protrusion can be provided as an integral section of the spacer element and / or as an element fastened to the spacer element. Preferably, the movement limiter or the protrusion can prevent the spacer element from being pulled out in at least one longitudinal direction of the spacer element, and particularly preferably, a movement out in both longitudinal directions of the spacer element is prevented or prevented by at least one movement limiter or by corresponding protrusions.The spacer element can be arranged, in particular supported, for example in a rotationally fixed manner on the support device and / or in a rotationally fixed manner on the delimiting body. The anti-rotation means can be achieved, for example, in that a receiving opening of the support device and / or of the delimiting body has a cross-sectional shape which corresponds to a cross-sectional shape of the spacer element in such a way that a relative rotation, in particular about the longitudinal axis of the spacer element, of the spacer element to the support device and / or to the delimiting body cannot be carried out. alternatively or additionally, the stop body can (a) be fastened or mounted on the support device, in particular on the sleeve body, such that it cannot be lost and / or (b) in a movable state such that it cannot rotate.In addition to the apparatus, the invention relates to a method for limiting a drilling depth for a drilling machine using an apparatus described herein. The method can provide, for example, that in a first method step a drill is inserted or fixed in a drill chuck of a drilling machine. The tip of the drill is then placed on a drill material, for example on a flat surface of a drill material. In the attached state of the drill on the drill material, the spacer element, in the state not fixed to the delimiting body, is attached with its free end to the drill material or brought into contact with the drill material and then the spacer element is fixed to the delimiting body, for example by means of the locking device. In other words, a point of zero or a point of 0 is set by the tip of the drill and the free end of the spacer element being brought into a common plane and the delimiting body being fixed with the spacer element in this state. The execution of an entry of the drill into the drill material consequently leads, by the contact of the free end of the spacer element, to a pushing back of the delimiting body and the spacer element or to a movement of the delimiting body and the spacer element in the direction opposite the drill material. Before or after or simultaneously with the insertion of a drill into the drilling machine and / or before or after or simultaneously with a zeroing of the spacer element and delimiting body (zero point position), the stop body can be fixed in a desired position, i.e. for example in or on, the sleeve body 9. This desired position is spaced from the initial state of the limiting body, this spacing corresponding to the set limited or predetermined maximum penetration depth of the drill through the device. When the maximum penetration depth is reached, contact of the delimiting body and the stop body occurs, wherein further retraction of the spacer element is prevented by the contact and thus further penetration of the drill into the drill material is also prevented. In order to simplify the setting of the drilling depth or the maximum penetration depth of the drill into the drill material by means of the device, the device can be equipped with a scale, by means of which it can be seen, on the basis of the position of the stop body relative to the scale, to which value the drilling depth or the maximum penetration depth the device is set.This ensures that the device can be set to a desired maximum penetration depth by means of few handles and at the same time the device can be realized with few components and can operate with high reliability. For example, with the device described herein, no further measurement means are required for setting the maximum penetration depth or the drilling depth.All advantages, details, embodiments and / or features of the device according to the invention can be transferred to or applied to the method according to the invention.The invention is explained in more detail on the basis of exemplary embodiments in the drawings. The following shows: FIG. 1 shows a schematic illustration of a device according to an exemplary embodiment in a starting position; FIG. 2 shows a schematic illustration of a device according to FIG. 2 in a position in which a borehole is introduced into an object; FIG. 3 shows a schematic illustration of a device according to a further embodiment; FIG. 4 shows a perspective basic illustration of a drilling machine equipped with a device, wherein the device in this embodiment is equipped with a mounting body and a dust collector; FIG. 5 shows a perspective basic illustration of a device according to FIG. 4 from a perspective view of a person holding the drilling machine; FIG. 6 shows a perspective illustration of a sleeve body of a carrying device detached from a holder according to a further embodiment; FIG. 7 is a perspective view showing the feeding of a biasing means into the inner space of the sleeve body of FIG. 6 ; FIG. 8 shows a perspective illustration of the feeding of a terminating body to the sleeve body according to FIG. 6 ; FIG. 9 shows a schematic illustration of the apparatus according to a further embodiment.The figures show a device 1 for limiting a drilling depth BT for a drilling machine BM, wherein a support device 2 which can be placed in a fixed relative position R with respect to a drilling machine BM and defines a longitudinal axis 3 is fastened to the drilling machine BM. The support device 2 can be detachably or non-detachably fastened to the drilling machine BM. Non-detachable fastening means that the support device 2 cannot be detached from the drilling machine BM in a non-destructive manner. The apparatus 1 further comprises a delimiting body 4 which is guided on the carrying device 2 such that it can be displaced relative to the latter along the longitudinal axis 3, preferably the delimiting body is mounted on the carrying device 2 such that it can slide and cannot be lost, in particular on, i.e. in or on, a sleeve body 9 of the carrying device 2. Furthermore, a spacer element 5 is held on the delimiting body 4 so as to be displaceable and lockable along the longitudinal axis 3. For example, the contact between the spacer element 5 and the delimiting body 4 forms an at least temporary longitudinally movable mounting of the spacer element 5 on the support device 2. Furthermore, the device 1 comprises a stop body 7 held on the support device 2 in at least one position along the longitudinal axis such that it can be locked, wherein the device 1 is configured to limit a predefined drilling depth BT by contact of the limit body 4 with the stop body 7. In other words, the stop body 7, in particular alternately, is held or temporarily held lockable in at least one first and at least one second position along the longitudinal axis 3. Consequently, the stop body 7 can be locked in at least a first and in at least a second position relative to the spacer element 5. When the stop body 7 locked on the support device 2 comes into contact with the delimiting body 4 locked on the spacer element 5, a movement of the spacer element 5 relative to the drilling machine BM, in particular relative to a drill arranged in the BM, is inhibited in at least one direction, so that the spacer element 5 comes into contact with the drill BG with its free end facing the drill BG and inhibits a further feed movement of the drilling machine BM and drill BG. By means of the distance, see double arrow 39, between the stop body 7 and the delimiting body 4, a drilling depth BT or a maximum penetration depth of the drill into the drill material BG can be predefined. By the contact of the mutually facing contact surfaces 40, 41 of the stop body 7 and of the delimiting body 4, a further penetration of the drill into the drill material BG is prevented and thus limited, cf. FIG. 2.The support device 2 can comprise, for example, a sleeve body 9 having a receiving space 8, wherein the delimiting body 4 and / or the spacer element 5 is or are arranged at least in sections in the receiving space 8 of the sleeve body 9. The sleeve body 9 can have a hole structure 10, wherein the delimiting body 4 reaches through the hole structure 10 at least in sections. The hole structure 10 can have, as illustrated in the figures, for example, an in particular rectilinear, elongated hole shape. As can be seen in particular in FIGS. 7 and 8, the hole structure can be formed by a sleeve body 9 which is slit at least in sections, preferably predominantly, particularly preferably completely. The delimiting of the hole structure 10 can be effected, for example, by means of a further support means 13. In the state of the device 1 mounted on the drilling machine BM, the hole structure 10 is preferably formed on an upper side and / or on a side of the sleeve body 9 facing away from the drilling machine BM. The hole structure 10 can preferably be open towards at least one end of the sleeve body 9, i.e. the hole formed by the hole structure 10 is free towards the outside, so that a linear insertion of the limiting body 4 into the sleeve body 9 is made possible despite the partial engagement of the limiting body 4 in the hole structure 10. This free end of the hole structure 10 can be closed by a screw body 38, cf. FIGS. 4 and 8, The screw body 38 can be, for example, a body provided with an internal thread, which is screwed onto a corresponding external thread section of the sleeve body 9 (or vice versa). Alternatively, the free end of the hole structure 10 can face the holder 25 or the adapter body 35 and be closed by the holder 25 or by the adapter body 35. The hole structure 10 preferably extends over the entire length of the sleeve body 9, i.e. is open on both sides towards the ends. This ensures that a scale 17 possibly arranged on the sleeve body 9 and / or a delimiting body 4 moving in the hole structure 10 can be viewed comfortably by a person handling the drilling machine BM.The sleeve body 9 can be fastened, for example, to a holder 25 of the drilling machine BM in a force-fit and / or form-fit and / or firmly bonded manner. For example, the sleeve body 9 has a threaded section, e.g. an external thread, which corresponds to a holder-side mating thread, e.g. an internal thread. Thus, the sleeve body 9 can be screwed, for example, to the holder 25. Alternatively or additionally, the sleeve body 9 can be fixed to the holder 25 or to the adapter body 35 by means of a clamping and / or latching connection (not shown), for example by the provision of a latching nose which latches into a mating latching structure.In the receiving space 8 of the sleeve body 9, for example, a supporting body can be arranged or formed, which is configured to support the spacer element 5 at least in sections relative to the sleeve body 9. The support body can be mounted fixed relative to the sleeve body 9 or movable, in particular longitudinally movable, relative to the sleeve body 9. It is thus possible, for example, for the supporting body to be designed as a sleeve which is mounted in the receiving space 8 of the sleeve body 9 in a longitudinally movable manner, in particular in a sliding manner. Regardless of any movability of the support body relative to the sleeve body 9, the spacer element 5 is supported at least in sections by the support body from the sleeve body 9.On at least one end region 12 of the sleeve body 9, preferably on an end region 12 of the sleeve body 9 facing away from the borehole BL to be drilled, a further support means 13 can be arranged or formed, for example, which is configured to support the spacer element 5 at least in sections relative to the sleeve body 9. The further support means 13 can be designed, for example, as an end cap and can be fastened to the sleeve body 9 in a force-fit and / or form-fit and / or firmly bonded manner on an end region 12 of the sleeve body 9 facing away from the borehole BL. For example, as can be seen in FIGS. 6 to 8, the sleeve body 9 has an external thread on its end region 12 facing away from the borehole BL, to which the further support means 13 (e.g. 38 screw bodies) can be screwed via a corresponding internal thread. Of course, the thread configuration between the further support means 13 and the end region 12 of the sleeve body 9 can also be designed in the opposite direction.In a preferred embodiment, the spacer element 5 is supported via the delimiting body 4 and via a support means 14, which is arranged or formed on a holder 25 and / or on an adapter body 35. This enables simple support of the spacer element 5 using fewer components. Alternatively or additionally, the support of the spacer element on the holder 25 and / or on the adapter body 35 and / or on the delimiting body 4 can be designed as a channel, in particular a straight channel, cf. FIGS. 1 to 3.A further support means 13 can be arranged or formed, for example, on at least one first end region 12 of the sleeve body 9 and a first support means 14 can be arranged or formed on a second end region 34 opposite the first end region 12, wherein the at least two support means 13, 14 are configured, for example, to support the spacer element 5 at least in sections relative to the sleeve body 9. The further support means 13 can be arranged or formed, for example, on an end of the sleeve body 9 facing away from the borehole BL and the first support means 14 on the end of the sleeve body 9 facing the borehole BL. The first support means 14 can be connectable to the sleeve body 9 in a force-fit and / or form-fit and / or firmly bonded manner. The first support means 14 can be formed, for example, by a passage opening of the holder 25, cf. FIGS. 1 and 2 or by a passage opening of the adapter body 35.In the embodiment shown in FIGS. 6 to 8, the sleeve body 9 is first inserted through an opening of a holder 25, wherein a threaded section 26 is positioned in the final assembled state on the side of the opening 37 of the holder 25 opposite the feed side and a screw means 33, e.g. a union nut, is screwed onto the threaded section 36 for fixing the sleeve body 9. The sleeve body 9 is thus fixed, in particular clamped, in a force-fit and / or form-fit manner on both sides of the opening 37 of the holder 25 by its thickening 32 on one end and by the screw means 33. Alternatively, the sleeve body 9 can be fixed to the holder 25 or to the adapter body 35 by means of a clamping and / or latching connection, for example by the provision of a latching nose which latches into a counter latching structure. The opening 37 of the holder 25 or of the adapter body 35 can enter into a connection secured against rotation with the assembled sleeve body 9. Thus, the opening 37 of the holder 25 or of the adapter body 35 can have, for example, a groove 29 or a counter element, in which an engagement element 26 on the sleeve body side engages in such a way that a rotational movement between the sleeve body 9 and the holder 25 or the adapter body 35 is prevented (anti-rotation prevention). The holder 25 can form a component of the device 1 and serve as an interface for fastening the device 1 to a fastening interface BS on the drilling machine BM. For example, the fastening interface BS is designed as a circular cylindrical region, to which the holder 25 can be fixed in a force-fit and / or form-fit manner; in particular, the holder 25 can be fastened in a clamping manner to the fastening interface BS. The holder 25 can have, for example, a grip element, cf. FIG. 4 or FIG. 5. The screw connection of the handle element on the holder 25 can optionally serve for fastening the handle element on the holder 25 and for clamping the holder 25 on the fastening interface BS of the drilling machine BM, cf. FIGS. 4 and 5.The support device 2 can comprise, for example, an adapter 23, which is configured to fasten the device 1 to a depth stop interface TS of a drilling machine BM and / or to a depth stop interface TS of a handle device and / or to a holder 25 of a drilling machine BM. As shown in FIG. 3, the adapter 23 can be inserted by means of an engagement protrusion 30 into a recess 27 of the drilling machine BM, in particular into a holder 25 of a drilling machine BM, in which a depth stop rod, for example a commercially available one having a hexagonal shape, was originally received. The depth stop rod is typically locked via a locking mechanism 31 of the depth stop interface TS. This locking mechanism 31 can likewise be used for fixing the adapter 23 to the depth stop interface TS, so that, for example, the engagement protrusion 30 can be fixed or is fixed in the recess 27 by the locking mechanism 31. In the embodiment shown in FIG. 3, the adapter 23 can have an adapter body 35 to which the sleeve body 9 is fixed. Furthermore, the adapter body 35 has an engagement protrusion 30, which can be introduced into an opening of the bottom stop interface TS. The engagement protrusion 30 may be formed integrally with the adapter body 35, for example. Alternatively, the engagement protrusion 30 can be connected to the adapter body 35 in a force-fit and / or materially bonded and / or positive-fit manner. For example, the engagement protrusion 30 can be designed as a screw which penetrates the opening of the depth stop interface TS at least in sections and is fastened to the depth stop interface TS, in particular by means of a nut. In the embodiment shown in FIG. 3, the engagement protrusion 30 is supplied from a side of the holder 25 facing away from the borehole BL to be drilled. Alternatively, as shown in FIG. 9, for example, the engagement protrusion 30 can be supplied from the side of the holder 25 facing the borehole BL to the recess 27 of the depth stop interface TS.It is possible that a biasing means 15 biases the limiting body 4 into a predefined position 6 relative to the support device 2. The pretensioning means 15 preferably pretensions the delimiting body 4 into an end position. The prestressing means 15 can particularly preferably prestress the delimiting body 4 into a position 6 of the delimiting body 4 which, during the intended operation of a drilling machine BM equipped with the device 1, faces a borehole BL to be drilled, cf. FIG. 3. The prestressing means 15 can be designed, for example, as a compression spring, cf. FIG. 7.Furthermore, it is possible for the prestressing means 15 to be arranged at least in sections, preferably predominantly, particularly preferably completely, in the receiving space 8 of the supporting device 2, in particular in a receiving space 8 of the sleeve body 9. The biasing means 15 preferably has a longitudinal axis which extends parallel, in particular coaxial, to the longitudinal axis 3 of the sleeve body 9. In a preferred embodiment, the biasing means 15 has a cavity 16 or defines such a cavity, wherein the spacer element 5 is received or receivable at least in sections in the cavity 16. The cavity 16 in which the spacer element 5 can be accommodated can run, for example, along the longitudinal axis of the prestressing means 15 and / or be present centrally in the prestressing means 15. In the case of a prestressing means 15 designed as a helical spring, the spacer element 5 can be accommodated, for example, in the central central region surrounded by the helical shape of the helical spring.The support device 2, in particular a sleeve body 9 of the support device 2, can have, for example, a scale 17 which displays drilling depth information 18 with the delimiting body 4 during the intended operation of the device 1. The scale 17 can be arranged in such a way that it makes visible a relative position of the support device 2 and the delimiting body 4 and / or makes visible distance values which the spacer element 5 has covered relative to the sleeve body 9 since the beginning of a drilling operation.The support device 2, in particular the sleeve body 9, and / or the delimiting body 4 and / or the stop body 7, can be fastened or are fastened to the drilling machine BM, for example, via an interface BS of a drilling machine BM in such a way that the support device 2, in particular the sleeve body 9, and / or the delimiting body 4 and / or the stop body 7, are fastened or can be fastened predominantly, preferably exclusively, to a side 28 of the interface BS facing or facing the borehole BL to be drilled. The interface BS can be arranged or formed, for example, between a drill chuck BF and a drive unit BA. The drive unit BA is connected via a shaft BW, optionally with the interposition of a transmission (not shown), to the drill chuck BF or to a drill accommodated in the drill chuck BF in a torque-transmitting manner. In this case, the support device 2, in particular the sleeve body 9, can be arranged or designed in such a way that there is no lateral overlapping of the drill chuck BF and the support device 2 and / or of the sleeve body 9. A construction can also be achieved thereby which does not project beyond or project beyond the support device 2 and / or the sleeve body 9 via the drill chuck BF in the direction of the drill material BG. The drilling machine BM equipped with the device 1 can thus be brought close to the drill stock BG, so that the use of smaller or short drills is made possible with a drilling machine BM equipped with the device 1.The delimiting body 4 can be or can be locked on the spacer element 5 for example by means of a locking device 19, wherein the locking device 19 enables a frictional and / or positive locking of the delimiting body 4 on the spacer element 5. For example, the locking device 19 is fastened to the limiting body 4 as a locking screw or as a clamping screw, wherein a relative movability of the spacer element 5 and the limiting body 4 is inhibited by a tightening of the locking screw or clamping screw.As illustrated, for example, in FIGS. 4 and 5, the device 1 can comprise a placement body 20 which is arranged on the spacer element 5 and can be placed flat on a drill material BG. This mounting body 20 can support a perpendicular approach of a drilling machine BM to a planar drill material. It is thus possible, for example, for a contact section of the mounting body 20 to be oriented perpendicularly to the longitudinal axis of the drill inserted in the drilling machine. The device 1 can also have a dust collector 21 with a machine coupling which can be mounted close to the drilling machine BM and the distance of which from the mounting body 20 can be varied, and an outer casing 22 which sealingly connects the machine coupling and the mounting body 20, and a drill chuck casing 22 which is arranged within the outer casing 22 and is mounted sealingly on the machine coupling and has a drill opening. This dust collector 21 can prevent a dust produced during drilling from being distributed in an uncontrolled manner in the environment of the drilling machine BM. Thus, for example, a suction device, for example a vacuum cleaner, can be connected to the dust collector 21 via a suction line, so that any drilling dust can reach the suction device via the dust collector 21.LIST OF REFERENCE CHARACTERS1 Device 2 Support device 3 Longitudinal axis of 2 4 Delimiting body 5 Spacer element 6 Position of 4 7 Stop body 8 Receiving space of 9 9 Sleeve body of 2 10 Hole structure of 9 12 First end region of 9 13 Further support means 14 First support means 15 Prestressing means 16 Cavity of 15 17 Scale of 9 18 Drilling depth information 19 Locking device 20 Mounting body 21 Drilling dust collector 22 Drill chuck casing 23 Adapter 24 Free end of 5 25 Holder 26 Engagement element 27 Recess of TS 28 side of BS 29 Groove 30 Engagement protrusion of 23 31 Locking mechanism of TS 32 Thickening 33 Screw means 34 Second end region 35 Adapter body 36 Threaded section of 9 37 Opening of 25 or 35 38 Screw body 39 Double arrow 40 Contact surface of 4 41 Contact surface of 7 BM BT Drilling depth TS Depth stop interface BG Drill stock BS Interface between BM and 2 BF Drill chuck BA Drive unit BW Shaft

Claims

Device (1) for limiting a drilling depth (BT) for a drilling machine (BM), having - a support device (2) which can be placed in a fixed relative position (R) with respect to a drilling machine (BM) and defines a longitudinal axis (3), - a limiting body (4) which is guided on the support device (2) such that it can be displaced relative thereto along the longitudinal axis (3), - a spacer element (5) which is held on the limiting body (4) such that it can be displaced along the longitudinal axis (3) and locked, - a stop body (7) which is held on the support device (2) such that it can be locked in at least one position along the longitudinal axis (3), wherein the device (1) is configured to limit a predefined drilling depth (BT) by contact of the limiting body (4) with the stop body (7).Device (1) according to claim 1, characterised in that the support device (2) comprises a sleeve body (9) having a receiving space (8), wherein the delimiting body (4) and / or the spacer element (5) is or are arranged at least in sections in the receiving space (8) of the sleeve body (9).Device (1) according to claim 2, characterised in that the sleeve body (9) has a hole structure (10), wherein the delimiting body (4) extends through the hole structure (10) at least in sections.Device (1) according to one of the preceding claims, characterized in that the spacer element (5) is supported via the delimiting body (4) and via a support means (14) which is arranged or formed on a holder (25) and / or on an adapter body (35).Device (1) according to claim 4, characterised in that the support of the spacer element (5) on the holder (25) and / or on the adapter body (35) is designed as a channel, in particular a rectilinear channel.Device (1) according to one of Claims 2 to 5, characterized in that a further support means (13) is arranged or formed on at least one first end region (12) of the sleeve body (9) and a first support means (14) is arranged or formed on an end region (34) opposite the first end region (12), wherein the at least two support means (13, 14) are configured to support the spacer element (5) at least in sections with respect to the sleeve body (9).Device (1) according to one of Claims 2 to 6, characterized in that the carrying device (2) comprises an adapter (23) which is configured to fasten the device (1) to a depth stop interface (TS) of a drilling machine (BM) and / or to a depth stop interface (TS) of a handle device of a drilling machine (BM) and / or to a depth stop interface (TS) of a holder (25) of a drilling machine (BM).Device (1) according to one of the preceding claims, characterized bya pretensioning means (15) which pretensions the delimiting body (4) in a predefined position (6) relative to the supporting device (2), preferably the pretensioning means (15) pretensions the delimiting body (4) in an end position position.Device (1) according to claim 8, characterised in that the biasing means (15) biases the limiting body (4) into a position (6) of the limiting body (4) which, during the intended operation of a drilling machine (BM) equipped with the device (1), faces a borehole (BL) to be drilled.Device (1) according to claim 8 or 9, characterised in that the prestressing means (15) is arranged at least in sections, preferably predominantly, particularly preferably completely, in the receiving space (8).Device (1) according to one of Claims 8 to 10, characterized in that the prestressing means (15) defines a cavity (16) in which the spacer element (5) is received or can be received at least in sections.Device (1) according to one of the preceding claims, characterized in that the support device (2), in particular a sleeve body (9) of the support device (2), has a scale (17) which, during the intended operation of the device (1) with the delimiting body (4), displays drilling depth information (18).Device (1) according to one of the preceding claims, characterized in that the support device (2), in particular the sleeve body (9), and / or the delimiting body (4) and / or the stop body (7) can be fastened or can be fastened to the drilling machine (BM) via an interface (BS) of a drilling machine (BM) in such a way that the support device (2), in particular the sleeve body (9), and / or the delimiting body (4) and / or the stop body (7) are fastened or can be fastened predominantly, preferably exclusively, on a side of the interface (BS) facing or facing away from the borehole (BL) to be drilled.Device (1) according to one of the preceding claims, characterized in that the delimiting body (4) can be locked on the spacer element (5) by means of a locking device (19), wherein the locking device (19) enables a frictional and / or positive locking of the delimiting body (4) on the spacer element (5).Device (1) according to one of the preceding claims, characterized bya mounting body (20) which is arranged on the spacer element (5) and can be placed flat on a drill material (BG).Device (1) according to claim 15, characterised bya drilling dust collector (21) with - a machine coupling which can be mounted close to the drilling machine (BM) and the distance of which from the mounting body (20) can be varied, - an outer casing (22) which connects the machine coupling and the mounting body (20) in a sealing manner, - a drill chuck casing (22) which is arranged within the outer casing (22) and is mounted in a sealing manner on the machine coupling and has a drill opening.Method for limiting a drilling depth BT for a drilling machine BM, characterized in that a device (1) according to one of the preceding claims is used.

Images