Bit holder with spacer ring

Abstract

The invention relates to a bit holder (100) for holding a bit (102) for coupling the bit (102) to a drive tool (104), wherein the bit holder (100) has a receiving device (106) which is designed to receive the bit (102); a tool coupling (108) which is designed to be coupled to the drive tool (104); an impact load protection device (110) which is designed to protect against an impact load acting on the bit holder (100), in particular on a fixing sleeve (124) of the bit holder (100), when the bit holder (100) hits an obstacle (301) while a fastening element (114) to be driven by means of the bit (102), the drive tool (104) and the bit holder (100) is driven, in particular rotatingly driven, into an anchoring base (112); and a spacer ring (200) which is removably attached to the impact load protection device (110) on one side in an insertion direction (119), wherein a through-opening (202) is provided in the spacer ring (200) and is configured to guide the fastening element (114) therethrough in order to bring the fastening element into contact with the bit (102).

Description

[0001] Bit holder with spacer ring

[0002] The invention relates to a bit holder for holding a bit for coupling the bit to a drive tool, a set with a bit holder and several spacer rings, an arrangement for introducing a fastening element into an anchoring base and a method for introducing a fastening element into an anchoring base.

[0003] The advantage of using bits is that a single tool allows for a wide range of screw drives of different sizes. Bit holders between a bit and a drive tool facilitate bit changes and also serve as adapters, allowing a drill, for example, to be used for screwdriving. Furthermore, a bit holder also effectively extends the bit. This is advantageous, for example, when screws need to be driven flush or in awkward places.

[0004] Power tools such as cordless screwdrivers, cordless drill drivers, drills, impact drivers, and hammer drills often have a keyless chuck or a magnetic hexagon socket, which are compatible with many bits for different screw drives. The magnetic bit holder can also be provided by an external bit holder. Bit holders can make work even easier. Particularly with a hexagon socket, which is often found on cordless screwdrivers, it can happen that the bit falls out of the holder while working. A bit holder secures the bit against withdrawal, usually with a clamping function or an integrated magnet, and still allows quick one-handed bit changes. Bit holders enable drilling and screwdriving without changing tools, for example. A bit holder can allow a bit change without opening the keyless drill chuck of the power unit.

[0005] Installation aids for setting pin-shaped fasteners, for example at an angle of equal to or less than 90° in relation to an anchoring base are well known. The aim is the precise setting of a wood screw, for example, at a defined angle (or 90°), for example to create wood-concrete composite systems, particularly ceilings. The setting aid can simplify and accelerate the positioning of the screw head at a defined distance and angle to the screw-in base. In wood-concrete composite systems, for example, full-thread screws are driven into the wood surface at an angle of 90°, 60°, 45° or 30°. The screw is driven into the wood surface in such a way that the screw head and part of the screw thread protrude above the wood surface in order to form a bond with the concrete cover.To provide the user with guidance when positioning the screw-in depth, some screws can be colored up to the insertion position. Another alternative for screw-in orientation is the press-in of a stop ring or a screw thickener to define the required protrusion length.

[0006] It is an object of the present invention to provide a bit holder, a bit holder for variable setting depths, an arrangement for introducing a fastening element into an anchoring base and a method for introducing a fastening element into an anchoring base, by means of which a setting depth of the fastening element can be precisely adjusted by means of simple operation.

[0007] This object is achieved by the subject matter having the features according to the independent patent claims. Further embodiments are shown in the dependent claims.

[0008] According to one embodiment of the invention, a bit holder for holding a bit is provided for coupling the bit to a drive tool. The bit holder has a receiving device configured to receive the bit; a tool coupling configured to couple to the drive tool; a shock load protection device configured to protect against a shock load acting on the bit holder, in particular on a fixing sleeve of the bit holder, when the bit holder strikes an obstacle when a fastening element to be driven by the bit, the drive tool, and the bit holder is inserted, in particular rotationally inserted, into an anchoring base; and a spacer ring removably attached to the shock load protection device on one side in an insertion direction. A through-opening is provided in the spacer ring, which is configured to guide the fastening element through in order to bring it into contact with the bit.

[0009] According to one embodiment of the invention, a set for inserting a fastener into an anchoring base is provided. The set includes the bit holder for holding a bit for coupling the bit to a drive tool; the bit, which is received or receivable in the receiving device of the bit holder; and a set of several spacer rings, which have different wall thicknesses between the inner surface of the spacer ring and an opposite, outer end surface of the spacer ring.

[0010] According to one embodiment of the invention, an arrangement for inserting a fastening element into an anchoring base is provided. The arrangement has the bit holder for holding a bit for coupling the bit to a drive tool; the bit, which is received or receivable on the receiving device of the bit holder; and a spacer device configured to be placed on an anchoring base and to receive the bit holder in such a way that, when the fastening element is inserted into the anchoring base, the end face of the shock load protection device or the spacer ring strikes a stop surface of the spacer device forming the obstacle, so that the fastening element can only be inserted into the anchoring base to a predetermined depth. The spacer device is used for work without increased visibility requirements, where fine adjustment by means of spacer rings is unnecessary.

[0011] The spacer can be used as an assembly aid for screws in a wood-concrete composite application in combination with the impact-protected bit holder, enabling precise angular guidance of the screw during the screwing process. The impact-protected bit holder engages the stop surface of the spacer when the defined screw-in height is reached, and the screw can be released after removing the impact-protected bit holder, thus precisely defining the screw position and the remaining protruding screw length.

[0012] The spacing device enables differentiation from existing mounting brackets for the arrangement of inclined screws, as it is tailored to the functionality of the impact-protected bit holder. It offers all the advantages of the impact-protected bit holder and extends these to applications where the screws must be screwed into the wood surface at an angle, or where, for example, the screw head must be arranged at a defined distance above the anchoring base. The spacing device is optimized for use with the impact-protected bit holder for the realization of, for example, wood-concrete composite systems. This defined spacing of screws or pin-shaped connecting elements can also be used in other areas of application (e.g., wood connectors, fixing of notches, i.e., settlement, for example).a screw in the function of a lift-off protection in a wood-concrete composite ceiling based on a notch surface of the wood element used, main beam-secondary beam connections). The screw or the pin-shaped connecting element is guided until it reaches its setting position and can be screwed at high speed until it reaches the setting point. This leads to considerable time savings in the work process and thus to particularly economical connections. Other areas of application can be found in general timber construction, solid construction and furniture construction, for example in a curtain wall, when screwing notches (arrangement of the guide channel at 90°), ie settlement e.g.a screw in the function of lifting protection in a wood-concrete composite floor based on a core surface of the wood element used, in main beam-secondary beam connections, where long bits are used for flush arrangement of the screw head in the screw base, when setting spacer screws in combination with wood connectors, when setting transport anchor screws for transport anchor systems, in general solid construction, when setting concrete screws in masonry, and in general furniture construction.

[0013] The assembly aid can be optimized for different applications by the inclination of the guide channel and the positioning of the contact levels as well as by the use of long bits.

[0014] Existing screw-in aids, such as the screw-in angle, offer the possibility of driving long screws into a wood surface at a specified angle. In the last 10 to 15 cm, the screw-in aid must be lifted from the wood surface, and the screw must be moved freehand until it reaches its insertion position. The exact insertion depth is achieved by significantly reducing the screwing speed in the last third of the insertion process and slowly approaching the insertion position; if necessary, the position must be corrected by turning back.

[0015] The spacer device can be made of metal, plastic or fiber-reinforced plastic and can be manufactured using milling, injection molding or 3D printing processes, among others.

[0016] According to one embodiment of the invention, a method for introducing a fastening element into an anchoring base using the arrangement is provided. The method comprises the following: receiving the bit in a receiving device of a bit holder; coupling a tool coupling of the bit holder to the drive tool; placing the base plate on the anchoring base; bringing the bit into contact with the fastening element, preferably with a head of the fastening element; inserting the bit holder and the fastening element into the spacer device, preferably into a guide of the spacer device. The order of the steps can be as shown above, but is not limited thereto.

[0017] The method then comprises a step for inserting, in particular rotating, the fastening element into the anchoring base by applying an insertion force acting on the fastening element using the bit, the drive tool, and the bit holder until the end face of the shock load protection device or the spacer ring of the bit holder strikes the stop surface of the spacer device, so that the fastening element is inserted into the anchoring base to the predetermined depth; and a step for removing the spacer device, preferably by lateral displacement, wherein the fastening element passes through a lateral opening in the guide. If the bit holder is used in combination with the spacer device, additional use of the spacer ring is not absolutely necessary. The spacer ring serves only for fine adjustment.The distance device is used for work without increased visibility requirements, where fine adjustment is unnecessary.

[0018] In the context of the present application, a "bit" can be understood in particular as an interchangeable drive element (for example, a screwdriver blade) without a handle for a specific profile of a fastening element (for example, a screw head profile). Examples of bit profiles are a slotted profile, a Phillips profile, a hexagonal profile, a Torx profile, and an AW or RW profile. A hexagonal receiving end of a bit, for example, can be shaped such that the bit can be inserted into a correspondingly shaped bit holder. In the context of the present application, a "bit holder" can be understood in particular as an adapter in a drive tool-bit holder-bit string, which enables a coupling with a bit on one side and a coupling with a drive tool on an opposite side.A bit holder can be a separate part of a drive tool or can be designed or mounted as an integral part of the drive tool (for example, a handle or a cordless screwdriver).

[0019] In the context of the present application, a "drive tool" can be understood in particular as a device with which a drive force can be applied, which can be transmitted to a bit by means of a bit holder. The drive force can in particular be a rotating or rotary drive force, optionally superimposed with a translational drive force. In other words, the drive tool can be designed to drive the bit holder and the bit, and thus a fastening element, in rotation, whose drive is coupled to the bit in a rotationally fixed manner. Alternatively, the drive force can also be a purely translational drive force. A drive force of a drive tool can be a pneumatic, hydraulic, or electric drive force, generated, for example, by a pneumatic device, a hydraulic device, or an electric motor, or can be the muscular force of a user.Examples of drive tools include a cordless screwdriver, a cordless drill driver, a rotary screwdriver, an impulse screwdriver, a ratchet screwdriver, a drill, an impact wrench, and a hammer drill. A user-rotatable handle with a coupling that can be coupled to a bit holder can also be used as a drive tool. Further examples of a drive tool include a screwdriver handle, an angled handle, a ratchet, or a torque wrench. In the context of the present application, a "fastening element" can be understood in particular as a body that can be inserted, in particular in a rotating manner, into an anchoring base by means of the bit arranged in the bit holder and driven by the drive tool. The fastening element is preferably a screw, particularly preferably a wood screw for insertion into a wooden anchoring base.Alternatively, the fastening element can also be a nail or a rivet, for example. The fastening element can be designed to be inserted into the anchoring base without pre-drilling or after a pre-drilling has been done. A rotating fastening element can have a self-tapping or self-forming external thread.

[0020] In the context of the present application, the term "anchoring base" can be understood in particular as a substrate suitable for anchoring the fastening element. Such an anchoring base can be or comprise in particular a wall, more particularly a vertical wall, or a ceiling. Materials for such an anchoring base are in particular wood or wood construction materials, or also concrete and masonry construction materials, metal or plastic components. Furthermore, such an anchoring base can also be any composite material made of several different material components. The anchoring base can have cavities or can be solid (i.e., free of cavities).

[0021] In the context of the present application, a "shock load protection device" can be understood in particular as at least one body or mechanism that absorbs, shields, reduces, mitigates, dampens and / or absorbs a shock load acting on the bit holder (in particular on a fixing sleeve of the bit holder) when the fastening element is inserted into the anchoring base and when the bit holder strikes a (in particular flat) outer surface of the anchoring base. In other words, with a shock load protection device, a lower shock load acts on the remaining bit holder than without a shock load protection device. For example, the shock load protection device can be designed as a disc, cylinder or sphere, which protect at least a portion of the bit holder from an impact.However, it is also possible to design the shock load protection device as an electronic mechanism that electronically measures a shock using a sensor or the like and sends feedback to an electric drive tool, stopping a (rotary) drive of the drive tool and therefore of the bit holder in order to protect at least part of the bit holder from impact. For example, the shock load protection device can also implement a spring (e.g., designed as a spring ring) or another preloading element that dampens an impact of the bit holder on the anchoring base. Possible materials for the shock load protection device are metals (e.g., steel), plastic (especially hard plastic), rubber (especially hard rubber), and / or fiberglass or fiberglass-reinforced material.

[0022] In the context of the present application, the term "obstacle" can be understood to mean, in particular, the anchoring base or its surface. In the context of the "arrangement," the obstacle can be formed by the stop surface of the spacer device.

[0023] Additional exemplary embodiments of the bit holder, the arrangement and the method are described below.

[0024] According to one embodiment, the spacer ring is configured to strike the obstacle when the fastening element is inserted into the anchoring base, so that the impact load protection device, together with the spacer ring, defines a maximum penetration depth of the fastening element into the anchoring base. According to one embodiment, the impact load protection device has an end face perpendicular to an insertion direction, in particular designed as an annular end face, against which an inner surface, in particular an inner ring surface, of the spacer ring rests.

[0025] According to one embodiment, the bit holder has at least one of the following features: the spacer ring has an inner surface that surrounds an outer surface of the shock load protection device, preferably at least partially abutting thereon; on an edge of the inner surface opposite the inner surface of the spacer ring, a radially inwardly projecting collar is provided, through which an inner diameter of the inner surface tapers, wherein an inner diameter at the collar is preferably smaller than an inner diameter of the inner surface; the spacer ring is made of an elastic material, preferably a soft plastic or soft fiber-reinforced plastic; the shock load protection device is attached to the bit holder in an interchangeable manner, in particular by screwing it on; the shock load protection device is fixedly attached to the bit holder;The shock load protection device is formed integrally with a bit sleeve of the bit holder, in particular welded and / or riveted to the bit sleeve; the bit sleeve has an external thread onto which an internal thread of the shock load protection device can be screwed or is screwed.

[0026] According to one embodiment, the shock load protection device has an inclined surface arranged at the rear of the end face, opposite an insertion direction, and oriented perpendicular to the insertion direction, in particular designed as an annular inclined surface. According to one embodiment, the shock load protection device has an end face extending radially inward from the annular inclined surface and oriented perpendicular to the insertion direction, in particular designed as an annular end face.

[0027] According to one embodiment, the bit holder has at least one of the following features: the shock load protection device extends circumferentially closed around the bit when the bit is received in the receiving device; the shock load protection device is made of a non-magnetic material; the bit holder has a fixing sleeve for fixing the bit to the receiving device, wherein the fixing sleeve is designed to selectively fix or release a bit received in the receiving device by means of displacement of the fixing sleeve; the shock load protection device is designed to absorb an impact movement acting on the fixing sleeve of the bit holder when striking an obstacle without the shock load protection device; the bit holder has a bit sleeve, in particular having the receiving device, over which the fixing sleeve is mounted;the fixing sleeve is mounted on the drive tool side and the shock load protection device is mounted on the bit side above the bit sleeve; the fixing sleeve extends in the axial direction along a maximum of 50%, in particular along a maximum of 40%, of an axial extension of the bit sleeve; the shock load protection device extends in the axial direction along a maximum of 30%, in particular along a maximum of 20%, of an axial extension of the bit sleeve; the receiving device has a hexagon socket; the tool coupling has an external hexagon; the shock load protection device projects radially beyond the rest of the bit holder along an entire circumference of the bit holder.

[0028] According to one embodiment, the spacer ring of the bit holder has at least one of the following features: a height between the inner surface of the spacer ring and an opposite surface of the collar is between 3 mm and 10 mm, preferably between 4 mm and 6 mm; an inner diameter at the collar is between 28 mm and 22 mm, preferably between 27 mm and 25 mm; an inner diameter of the inner circumferential surface of the spacer ring is between 27 mm and 29 mm, preferably between 28 mm and 28.5 mm; an outer diameter of the spacer ring is between 29 mm and 34 mm, preferably between 30 mm and 33 mm; a wall thickness between the inner surface of the spacer ring and an opposite, outer end face of the spacer ring is between 0.5 mm and 3 mm, preferably between 1 mm and 2 mm.

[0029] According to one embodiment of the arrangement, the spacer device has a guide, preferably a guide channel, for the fastening element, which extends perpendicular to the stop surface of the spacer device, wherein the guide preferably has an inner metal profile for protection against abrasion.

[0030] According to one embodiment of the arrangement, the guide comprises a fiber-reinforced plastic profile or a sleeve made of metal or plastic, which is arranged interchangeably in the spacer device, wherein the sleeve is preferably held in the shaft of the spacer device by a screw provided in a shaft of the spacer device; further preferably, a set of sleeves with different inner diameters is provided. According to one embodiment of the arrangement, the guide preferably comprises a lateral opening configured to allow the spacer device to be removed from the anchoring base once the fastening element has been inserted. The screw can be released through the lateral opening after the intended position has been reached by laterally displacing the spacer device.

[0031] According to one embodiment of the arrangement, the guide is inclined at an angle to the anchoring base, wherein the angle of inclination is preferably adjustable and fixable. The angle can be arbitrarily less than 90° with respect to the anchoring base.

[0032] According to an embodiment of the arrangement according to the preceding claim, the guide has a funnel-shaped widening at an inlet for the fastening element.

[0033] According to one embodiment, the arrangement has at least one of the following features: an outer contour of the spacer device is shaped as a handle; the spacer device has a base plate for resting on the anchoring base, wherein preferably tips protrude from an underside of the base plate in order to be able to anchor the base plate, and / or wherein preferably markings are provided on an edge of the base plate, which indicate an exit position of the fastening element from the base plate;the spacer device has a base plate for resting on the anchoring base, wherein preferably at least one receptacle for one or more bits is provided on the base plate, and / or wherein through holes are preferably provided in the base plate through which screws can be passed for temporarily fixing the spacer device to the anchoring base, wherein more preferably the through holes are provided in raised sections on the base plate; the spacer device has a further handle, in which preferably a recess is provided, into which the bit holder can be inserted or snapped in order to store the bit holder therein; the spacer device has a magnet or a brush ring inside the guide, which is configured to hold the fastening element; the fastening element is preferably a wood screw.;

[0034] According to one embodiment of the method, after inserting the bit holder and the fastening element into the spacer device, and preferably also after bringing the bit into contact with the fastening element, the spacer device is tilted such that the fastening element is placed essentially perpendicularly on the anchoring base and pressed into the anchoring base; and then the base plate is placed flat against the anchoring base. For example, the fastening element can be pressed into the anchoring base to a depth of 1 to 2 mm. Depending on the screw type, the spacer device can also be placed flat immediately. Screws with a roof-shaped drill tip are more likely to run out during an angled screw connection than screws with a normal tip.

[0035] In the following, exemplary embodiments of the present invention are described in detail with reference to the following figures.

[0036] Figure 1 shows a front view of a bit holder according to an exemplary embodiment of the invention, with and without a spacer ring. Figure 2 shows top, front, and cross-sectional views of a spacer ring and the bit holder according to an exemplary embodiment of the invention.

[0037] Figure 3 shows a set consisting of a bit holder for variable setting depths with different spacer rings according to an exemplary embodiment of the invention.

[0038] Figure 4 shows front, top and cross-sectional views as well as a perspective view of a spacer device according to an exemplary embodiment of the invention.

[0039] Figure 5 shows cross-sectional views of an arrangement with a bit holder and a spacer device according to an exemplary embodiment of the invention.

[0040] Figure 6 shows top and cross-sectional views of an arrangement with a bit holder and a spacer device according to an exemplary embodiment of the invention.

[0041] Figure 7 shows a perspective view of a spacing device according to an exemplary embodiment of the invention.

[0042] Figure 8 shows perspective views of a spacer device with bit holder according to an exemplary embodiment of the invention.

[0043] Figures 9 and 10 show side views of a spacing device according to an exemplary embodiment of the invention.

[0044] Figure 11 shows various views of a spacing device according to an exemplary embodiment of the invention.

[0045] Figure 12 shows a three-dimensional view of a bit holder with a bit mounted on it.

[0046] Figure 13 shows a side view of a bit holder with a bit mounted on it.

[0047] Figure 14 shows a side view of the bit holder according to Figure 13 separated from the bit. Figure 15 shows a side view of the bit holder according to Figures 13 and 14 separated from a shock load protection device.

[0048] Figure 16 shows a side view of a bit holder with a bit mounted on it.

[0049] Figure 17 shows a side view of the bit holder according to Figure 16 without a bit.

[0050] Figure 18 shows a side view of a bit holder with a bit mounted on it.

[0051] Figure 19 shows a side view of the bit holder according to Figure 18 without a bit.

[0052] Figure 20 shows a three-dimensional view of a bit holder with a bit mounted on it.

[0053] Figure 21 shows another three-dimensional view of the bit holder according to Figure 20.

[0054] Figure 22 shows another three-dimensional view of the bit holder according to Figure 20 and Figure 21.

[0055] Figure 23 shows a three-dimensional view of the bit holder without a bit, approximately corresponding to Figure 22.

[0056] Figures 24 to 28 show side views of a bit holder with a bit received thereon during a method for inserting a fastener into an anchoring base.

[0057] Figures 29 to 31 show side views of bit holders with bits mounted thereon during insertion of a fastening element into an anchoring base.

[0058] Figure 32 shows a side view of a shock load protection device of a bit holder.

[0059] Identical or similar components in different figures are provided with the same reference numerals. Figure 1 shows a front view of a bit holder 100 according to an exemplary embodiment of the invention with and without a spacer ring, and Figure 2 shows top, front, and cross-sectional views of a spacer ring 200 and the bit holder 100 according to an exemplary embodiment of the invention.

[0060] The bit holder 100 serves to hold a bit 102 for coupling the bit 102 to a drive tool 104. The bit holder 100 has a receiving device 106 (see Figure 8) which is designed to receive the bit 102, a tool coupling 108 which is designed to couple to the drive tool 104 (symbolically indicated in Figure 13), and a shock load protection device 110 which is designed to protect against a shock load acting on the bit holder 100, in particular on a fixing sleeve 124 of the bit holder 100, when the bit holder 100 strikes an obstacle 301 when a fastening element 114 to be driven by means of the bit 102, the drive tool 104 and the bit holder 100 is introduced, in particular is introduced in a rotating manner, into an anchoring base 112. The fastening element 114 can, in particular, be a wood screw. The obstacle 301 can, in particular, be the anchoring base 112 or its surface.

[0061] In particular, the bit holder 100 also comprises a spacer ring 200, which is removably attached to the shock load protection device 110 on one side in an insertion direction 119, wherein a through-opening 202 is provided in the spacer ring 200, which is configured to guide the fastening element 114 through in order to bring it into contact with the bit 102. The spacer ring 200 is configured to strike the obstacle 301 when the fastening element 114 is inserted into the anchoring base 112, so that the shock load protection device 110, together with the spacer ring 200, defines a maximum penetration depth of the fastening element 114 into the anchoring base 112. The shock load protection device 110 has an end face 203 perpendicular to an insertion direction 119, which is designed in particular as an annular end face 203, and against which an inner surface 204 (see Figure 2), in particular an inner ring surface 204, of the spacer ring 200 rests.The through-opening 202 of the spacer ring 200 is aligned with a through-opening of the shock load protection device 110, via which the shock load protection device 110 is attached to the bit sleeve 126. For example, the bit sleeve 126 can have an external thread 138 onto which an internal thread 140 of the shock load protection device 110 can be screwed or is screwed. The through-opening 202 of the spacer ring 200 is aligned with both the external thread 138 of the bit sleeve 126 and the internal thread 140 of the shock load protection device 110.

[0062] The spacer ring 200 further has an inner surface 205 that surrounds an outer surface 1101 of the shock load protection device 110 and preferably at least partially abuts thereon. A radially inwardly projecting collar 206 is provided on an edge of the inner surface 205 opposite the inner surface 204 of the spacer ring 200, through which an inner diameter of the inner surface 205 tapers, so that an inner diameter d3 at the collar 206 is smaller than an inner diameter d2* of the inner surface 205. The spacer ring 200 is made of an elastic material, preferably a soft plastic or soft fiber-reinforced plastic. This allows the spacer ring 200 to be easily pulled over the shock load protection device 110 and is held in place by the collar 206.

[0063] The shock load protection device 110 is replaceably attached to the bit holder 100, in particular, it can be screwed on. Alternatively, the shock load protection device 110 can be formed integrally with a bit sleeve 126 of the bit holder 100; for example, it can be welded and / or riveted to the bit sleeve 126. However, the bit sleeve 126 preferably has an external thread 138 onto which an internal thread 140 of the shock load protection device 110 can be screwed or is screwed.

[0064] The shock load protection device 110 can have an inclined surface 116 arranged at the rear of the end face 203, opposite an insertion direction 119, oriented perpendicular to the insertion direction 119, which is particularly designed as an annular inclined surface 116. The shock load protection device 110 can have an end face 118 extending radially inward from the annular inclined surface 116 and oriented perpendicular to the insertion direction 119, which is particularly designed as an annular end face 118. The shock load protection device 110 can be unscrewed and screwed back on in reverse, as shown in Figures 9 to 28, in order to perform a pure shock load protection function in another use without the spacer ring 200.

[0065] According to Figure 2, a height h* between the inner surface 204 of the spacer ring 200 and an opposite surface of the collar 206 is between 3 and 10 mm, preferably between 4 and 6 mm. The inner diameter d3 at the collar 206 is between 28 and 32 mm, preferably between 27 and 25 mm. The inner diameter d2* of the inner circumferential surface 205 of the spacer ring 200 is between 27 and 29 mm, preferably between 28 and 28.5 mm. An outer diameter dl of the spacer ring 200 is between 29 and 34 mm, preferably between 30 and 33 mm. A wall thickness s between the inner surface 204 of the spacer ring 200 and an opposite, outer end face of the spacer ring 200 is between 0.5 and 3 mm, preferably between 1 and 2 mm.

[0066] Reference numeral 207 denotes an optional logo or marking that can be applied to the spacer ring 200.

[0067] The spacer ring 200 enables fine adjustment of the screw head, among other things, in wooden surfaces. The shock-protected bit holder 100 for working in wood can, for example, position the screw head for countersunk screws as the fastening element 114 with the drive size RW40 flush or up to approximately 1 mm deeper than the wood surface, making it ideal for driving screws in non-visible applications. Smaller countersunk screws, e.g., with a diameter of 4.5 mm, can be countersunk into the anchoring base 112 to a depth of approximately 1.5 to 2 mm using a smaller drive, such as R.W20. The resulting countersinking depth can be adjusted depending on the drive size, the head shape, the head diameter, and the penetration depth of the bit 102 into the head shape.

[0068] For applications in visible areas, such as on (wooden) facades or (wooden) terraces, where screws with small screw heads and a small drive (R.W20) are used, the achieved setting depth of the screw head could be too deep or the requirement for a perfectly flat seal between the screw heads and the wood surface could be more difficult to achieve. To achieve this, spacer rings 200 of varying thicknesses can be used. The desired spacer ring 200 can be selected depending on the desired setting depth and the selected screw type and pushed onto the shock-protected bit holder 100, whereby the desired setting depth can be adjusted in stages. The dimensions of the spacer ring 200 are selected such that its inner diameter d2* can be slipped over the outer diameter d2 of the shock load protection device 110, designed here as a stop ring, of the shock-protected bit holder 100.The inner spacer ring height h* corresponds to a height h of the impact load protection device 110 of the bit holder 100, designed as a stop ring. The collar 206 tapers the spacer ring 200 to a diameter d3. Via this reduced diameter, the spacer ring 200 hooks onto a surface of the impact load protection device 110 of the impact-protected bit holder 100, designed as a stop ring, and holds it there in position. To achieve particularly good fixation of the spacer ring 200 on the impact load protection device 110 of the impact-protected bit holder 100, the spacer ring 200 can be made of a soft plastic or soft fiber-reinforced plastic or similar. At the same time, pressure marks of the spacer ring 200 on the wood surface are prevented.

[0069] Figure 3 shows a set consisting of a bit holder 100 for variable setting depths according to an exemplary embodiment of the invention with various spacer rings 200. The set also serves for introducing a fastening element 114 into an anchoring base 112. The set includes the bit holder 100 for holding a bit 102 for coupling the bit 102 to a drive tool 104, the bit 102, which is received or receivable on the receiving device 106 of the bit holder 100; and the set of several spacer rings 200, which have different wall thicknesses s1, s2, s3 between the inner surface 204 of the spacer ring 200 and an opposite, outer end face of the spacer ring 200.

[0070] During the screwing process, the shock-protected bit holder 100 with the spacer ring 200 releases the screw head earlier, or the screw head is sunk less deeply, compared to a shock-protected bit holder 100 without a spacer ring. By using the attached spacer ring 200, the position of the tip of the bit 102 relative to the surface of the shock load protection device 110, designed as a stop ring, of the shock-protected bit holder 100 is reduced according to the thickness of the selected spacer ring 200. If a correction of the setting depth is necessary, a spacer ring 200 with a suitable wall thickness s is pushed onto the shock load protection device 110. The greater the wall thickness s (sl <s2<s3), umso geringer taucht der Schraubenkopf des Befestigungselements 114 in den Verankerungsgrund 112 ein.

[0071] Figure 4 shows front, top and cross-sectional views as well as a perspective view of a spacer device 300 according to an exemplary embodiment of the invention, and Figure 5 shows cross-sectional views of an assembly with a bit holder 100 and a spacer device 300 according to an exemplary embodiment of the invention.

[0072] The arrangement also serves to introduce a fastening element 114 into an anchoring base 112. The arrangement comprises the bit holder 100 for holding a bit 102 for coupling the bit 102 with a drive tool 104, the bit 102, which is received or can be received on the receiving device 106 of the bit holder 100, and the spacer device

[0073] 300, which is configured to be placed on an anchoring base 112 and to receive the bit holder 100 in such a way that the end face 203 of the shock load protection device 110 or the spacer ring 200, when the fastening element 114 is inserted into the anchoring base 112, is in contact with an obstacle

[0074] 301 forming a stop surface 301 of the spacer device 300, so that the fastening element 114 can only be inserted into the anchoring base 112 to a predetermined depth. In other words, a length L (see Figure 5) of the fastening element 114 remains above the anchoring base 112.

[0075] The spacer device 300 has a guide 302, preferably a guide channel 302, for the fastening element 114, which extends perpendicular to the stop surface 301 of the spacer device 300, wherein the guide

[0076] 302 preferably has an inner metal profile 309 (see Figure 5) for protection against abrasion. The guide 302 further has a lateral opening 303, which is configured so that the spacer device 300 can be removed from the anchoring base 112 when the fastening element 114 is inserted. The guide 302 is inclined at an angle α to the anchoring base 112, wherein the angle of inclination is preferably adjustable and fixable in one modification. The guide 302 has a funnel-shaped widening 304 at an inlet for the fastening element 114 so that the fastening element 114 can be inserted easily and precisely into the guide 302.

[0077] An outer contour of the spacer device 300 is shaped like a handle. Ergonomic radii 310 are provided for this purpose. In particular, the area between the base plate 305 and the handle is optimized for ergonomic operation through rounded radii, allowing for a good grip. The drawings show the spacer device 300 optimized for right-handed users. For left-handed users, the spacer device 300 can be shaped with mirror symmetry.

[0078] The spacer device 300 has a base plate 305 for resting on the anchoring base 112, wherein preferably tips 306 protrude from an underside of the base plate 305, and / or wherein preferably markings 307 are provided on an edge of the base plate 305, which indicate an exit position of the fastening element 114 from the base plate 305. Furthermore, the spacer device 300 can have a magnet or a brush ring inside the guide 302, which is configured to hold the fastening element 114. The magnet itself is not shown, but it can be arranged at the level 311 of the stop surface 301.

[0079] Figure 6 shows top and cross-sectional views of an assembly with a bit holder 100 and a spacer device 300 according to an exemplary embodiment of the invention. A method for introducing a fastening element 114 into an anchoring base 112 using the assembly may include the steps described below.

[0080] The left part of Figure 6 includes steps for receiving the bit 102 on a receiving device 106 of a bit holder 100; for coupling a tool coupling 108 of the bit holder 100 to the drive tool 104; for placing the base plate 305 on the anchoring base 112; bringing the bit 102 into contact with the fastening element 114, preferably with a head of the fastening element 114; and inserting the bit holder 100 and the fastening element 114 into the spacer device 300, preferably into a guide 302 of the spacer device 300. The order of the steps may be as described above, but is not limited thereto.

[0081] The middle part of Figure 6 includes a step for inserting, in particular rotating, the fastening element 114 into the anchoring base 112 by applying an insertion force acting on the fastening element 114 using the bit 102, the drive tool 104, and the bit holder 100, until the end face 203 of the shock load protection device 110 or the spacer ring 200 strikes the stop surface 301 of the spacing device 300, so that the fastening element 114 is inserted into the anchoring base 112 to the predetermined depth. In doing so, the fastening element 114 or the head of the fastening element 114 typically detaches from the bit 102.

[0082] The right part of Figure 6 shows a step for removing the spacer device 300 by laterally displacing the spacer device 300, wherein the fastening element 114 passes through a lateral opening 303 of the guide 302.

[0083] Optionally, after inserting the bit holder 100 and the fastening element 114 into the spacer device 300, and preferably also after bringing the bit 102 into contact with the fastening element 114, the spacer device 300 is tilted such that the fastening element 114 is placed substantially perpendicularly onto the anchoring base 112 and manually pressed into the anchoring base 112, and that the base plate 305 is then placed flat against the anchoring base 112. For example, the fastening element 114 can be pressed into the anchoring base 112 to a depth of 1 to 2 mm.

[0084] Figure 7 shows a perspective view of a spacer device 300 according to an exemplary embodiment of the invention. The spacer device 300 has an additional handle 308, which makes the spacer device 300 particularly ergonomic and greatly simplifies the insertion of the fastening element 114.

[0085] According to the present invention, bit holder 100 can be used with or without the spacer ring 200 and the spacer device 300 to screw the fastener or screw head at a defined distance from the surface of the anchoring base.

[0086] Figure 8 shows perspective views of a spacer device 300 with a bit holder 100 according to an exemplary embodiment of the invention. The spacer device 300 of Figure 8 is a modification of the spacer device 300 of Figure 7. A recess 312 is provided in the handle 308, into which the bit holder 100 can be inserted and preferably locked. The recess 312 serves as a possible storage location for the bit holder 100. Furthermore, at least one receptacle for different bits 102 can be provided on the preferably flat base plate 305. Furthermore, through-holes 313 are provided at the corners of the base plate 305, through which screws can be passed to temporarily fix the spacer device 300 to the anchoring base 112. Preferably, the through-holes 313 are located in raised sections on the base plate 305, as shown in Figure 8.

[0087] Figures 9 and 10 show side views of a spacer device 300 according to an exemplary embodiment of the invention. The inner metal profile 309 is designed here as a sleeve 309 made of metal or plastic and arranged interchangeably. The sleeve 309 is held in the shaft of the spacer device 300 by a screw 314; the tip of the screw 314 engages in a circular bore 315 on the reveal of the sleeve 309 and secures it against slipping. Different inner diameters of the sleeve 309 allow screws of different thicknesses to be processed with the spacer device 300; these are, in particular, cylinder head screws with a diameter of 8.0 mm, 10.0 mm, and 12.0 mm. The sleeve 309 is shaped in such a way that its reveal widens in a funnel shape at both ends in order to facilitate the insertion and removal of the fastening element 114 or the screw tip and the screw head.

[0088] The spacer device 300 shown in Figures 8 to 10 does not have a lateral opening 303. In contrast to the variants already shown, the spacer device 300 of Figures 8 to 10 is removed from the anchoring base 112 by not displacing it laterally, but by lifting it and retracting it in the direction of the shaft axis of the spacer device 300.

[0089] By using bits 102 of different lengths, the fastening element 114 or the screw head of the screw can either be inserted flush into the anchoring base 112 with a long bit 102, as shown in the two upper drawings of Figure 10, or the fastening element 114 can be inserted with a shorter or medium-length bit 102 at a distance L from the anchoring base 112, as shown in the two lower drawings of Figure 10.

[0090] Figure 11 shows various views of a spacer device 300 according to an exemplary embodiment of the invention. A logo and / or lettering 207 can be applied to one or both sides of the shaft of the spacer device 300. An indication 316 regarding the inclination can be provided, for example, on a front side of the spacer device 300.

[0091] The shock load protection device 110 can be unscrewed from the bit sleeve 126 and screwed back onto the bit sleeve 126 in reverse, as shown in Figures 12 to 32, in order to perform a pure shock load protection function in another application without the spacer ring 200. Conventional bit holders can exhibit inadequate wobble behavior when used in a combination of a wood screw, a mechanical bit holder, and a cordless screwdriver. In such a combination with a bit holder, the wood screw can be subject to a pronounced wobble movement. This can even lead to undesirable spinning of wood screws, for example, when screwing into robinia or beech. This can, for example, have the undesirable effect of numerous metal shavings accumulating on the bit, which can further reduce the bit / screw fit, so that spinning of subsequent screws can become even more pronounced.Furthermore, the creation of metal chips, particularly when using magnetic bit holders, can lead to undesired adhesion of the metal chips to the bit holder and thus to a further reduction in setting quality.

[0092] By inverting the shock load protection device 110, a stable mechanical bit holder 100 can be created, which can also be non-magnetic and exhibits significantly suppressed wobble behavior. The inverted, mounted inclined surface 116 of the shock load protection device 110 preferably rests flush with a fastener head. Such a preferably non-magnetic, mechanically reinforced bit holder 100 can advantageously be equipped with integrated shock protection.

[0093] Particularly in timber construction, countersunk head screws are often countersunk deeper than the wood surface. Due to the deeper countersinking of the screw head, a fixing sleeve 124 of a mechanical bit holder 100 can strike the wood surface and suffer a strong mechanical impact. Repeated impact loading of this type can lead to mechanical damage to the fixing sleeve 124 of the bit holder 100.

[0094] To overcome or at least mitigate such disadvantages, by turning the shock load protection device 110, which is preferably designed as a beveled impact ring, an impact movement is fully or partially absorbed and prevents or reduces damage to the fixing sleeve 124. The bevel increases the screw-in resistance and thus prevents the screw head from being countersunk too deeply. As the screw is turned further, the two components are further pulled together by the advance of the screw thread until the bit 102 slips out of the drive. A permissible countersinking depth can be adjusted depending on the protrusion of the bit 102 or, as a result, on the bit length. To achieve a long service life of the impact ring 110, it can be advantageous to mechanically harden the impact ring 110 and / or to design it such that the impact force acting on the impact ring 110 is dampened or reduced.

[0095] When designing such a bit holder 100, a relatively short fixing sleeve 124 can be combined with a relatively long bit sleeve 126 for the bit receptacle, so that the impact ring 110 or another impact load protection device can be pushed onto or mounted on a bit sleeve 126 together with a fixing sleeve 124. The described dimensioning of the bit sleeve 126 and the fixing sleeve 124 is therefore advantageous so that the screwed-on impact protector 110 can be attached. Such a screwed-on impact protector 110 is particularly advantageous. Shortening the locking mechanism or the fixing sleeve 124 is advantageous so that the bit holder 100 does not become too long and the locking mechanism can still be moved.

[0096] Furthermore, a metric thread (preferably an external thread 138) can advantageously be formed on the end of the bit sleeve 126 facing the bit 102 in order to enable a replaceable shock load protection device 110 to be screwed on. Since the shock load protection device 110 can be particularly exposed to force during operation of the bit holder 100, its replaceable attachment to the bit holder 100 is advantageous in order to be able to replace the shock load protection device 110 as a wearing part while continuing to use the rest of the bit holder 100. In other words, it is then possible to screw on the mechanical shock protection device 110, which can be disc-shaped, for example, as a wearing or replacement part. The diameter of such a shock protection disc 110 can advantageously be larger than a head diameter of the fastening element 114 (in particular, larger than a screw head).For example, the core diameter of a countersunk screw operated using the bit holder 100 with bit 102 can be 10 mm and the corresponding screw head can have a diameter of 18.5 mm. Then, for example, the diameter of an impact washer can be 20.5 mm and the thickness of the impact washer can be 4 mm. For a screw with a core diameter of 8 mm, the diameter of the impact washer can be 18 mm, for a core diameter of 6 mm, the diameter of the impact washer can be 14 mm, and for a core diameter of 5 mm, the diameter of the impact washer 110 can be 11.5 mm. The removability of the screwed impact washer 110 enables, on the one hand, the easy replacement of the impact washer 110, which is particularly exposed to wear, and, on the other hand, when screwing on a deeply countersunk screw, it enables deeper insertion into the screw hole and adaptation to the screw diameter.

[0097] During operation, a bit holder 100 can be combined with the bit 100 and with the fastening element 114, which is preferably designed as a screw, and the fastening element 114 can thus be screwed into the anchoring base 112. In this case, the bit projection or the bit length can be adjusted to the bit sleeve 126.

[0098] Thus, a stable, non-magnetic mechanical bit holder 100 for timber construction can be created. A preferred application for such a bit holder 100 is timber construction when using screws, particularly with a core diameter between 5 mm and 10 mm. Experiments have shown that the mechanics of conventional bit holders can be damaged if the countersunk screws are countersunk too deeply, so users prefer 50 mm bits or magnetic bit holders 100. The use of a bit holder 100 can also be carried out flexibly when countersinking a fastening element 114 inside an anchoring base 112. In such a scenario, reliable mechanical shock protection of the bit holder 100 can be ensured.

[0099] Figure 12 shows a three-dimensional view of a bit holder 100 with a bit 102 held thereon.

[0100] More specifically, Figure 12 shows an arrangement 150 for inserting a fastening element (not shown in Figure 12) (see reference numeral 114 in Figures 24 to 31) into an anchoring base (not shown in Figure 12) (see reference numeral 112 in Figures 26 to 31). The fastening element can be a wood screw, and the anchoring base can be a wooden substrate.

[0101] The assembly 150 comprises a metallic bit holder 100 for holding a metallic bit 102 on a drive tool (e.g., a cordless screwdriver) also not shown in Figure 12. Furthermore, the assembly 150 contains the bit 102, which, as shown in Figure 12, is received in a receiving device 106 of the bit holder 100. Thus, the bit holder 100 serves to hold the bit 102 on the drive tool, which in turn can rotationally drive the bit holder 100 and thereby indirectly the bit 102 and ultimately the fastening element engaged by the bit 102.

[0102] As shown in Figure 12, the bit holder 100 has at one end the aforementioned receiving device 106, which is designed for positively receiving the bit 102 in a receiving opening of the receiving device 106. A hexagon socket can be formed in the receiving opening, which can receive an external hexagon 144 of the bit 102. Furthermore, the bit holder 100 contains at its opposite end a tool coupling 108, which is designed for positive coupling with the drive tool. According to Figure 12, the tool coupling 108 has an external hexagon 130, which can be received in a chuck of the drive tool. Advantageously, the bit holder 100 also contains a

[0103] Shock load protection device 110 that circumferentially surrounds an end of the bit 102 received in the receiving device 106. The shock load protection device 110 functions to reduce a shock load acting on the bit holder 100 when it impacts the anchoring base at the end of the process of rotatingly setting the fastening element into the anchoring base. In other words, the shock load protection device 110 impacts the anchoring base in a shock-absorbing, shock-absorbing, or shock-absorbing manner when the fastening element, driven by the bit 102, the drive tool, and the bit holder 100, is inserted deeply into the anchoring base. As can be seen in Figure 12, the shock load protection device 110 has an inclined surface 116 that faces the anchoring base during operation and is designed as an annular inclined surface 116.Illustratively, therefore, the shock load protection device 110 does not impact the outer surface of the anchoring base head-on, but at an angle, resulting in a shock-absorbing and frictional force introduction and therefore in mechanical protection of the bit holder 100. Furthermore, the shock load protection device 110 can have an end face 118 oriented parallel to the anchoring base 112 between the inclined surface 116 and the anchoring base, which is preferably designed as a small-area annular end face 118. The annular end face 118 of the shock load protection device 110 can form an axial end of the bit holder 100 when the spacer ring 200 is not in place. Upon placement on the anchoring base, a small-area contact can initially occur between the annular end face 118 and the anchoring base, which inhibits tilting of the bit holder 100.Subsequently, the larger beveled surface 116 can come into contact with the anchoring base, which can, in particular, reduce or absorb an impact force that would otherwise act on a fixing sleeve 124 of the bit holder 100. The beveled surface 116 provides a user with sufficiently early haptic feedback that the outer side of the anchoring base has been reached.

[0104] According to Figure 12, the shock load protection device 110 has an approximately frustoconical annular body section 121 facing the anchoring base during operation. Adjoining this at the rear is a disk-shaped annular body section 123 with a substantially semicircular peripheral edge 125. The two annular body sections 121, 123 are formed integrally. When the bit 102 is received in the receiving device 106, the shock load protection device 110 can extend circumferentially around the bit 102 and thus also provide shock protection in the radial direction. Advantageously, the shock load protection device 110 can also be made of a non-magnetic material, which prevents unwanted adhesion of metallic particles to the bit holder 100, which could, for example, be sheared off by the fastening element during operation.Such adhesion of metallic particles may impair the precision of insertion of the fastener into the anchoring base by means of the bit holder 100 and the bit 102.

[0105] Furthermore, Figure 12 shows that the bit holder 100 has a sleeve-shaped fixing sleeve 124 for selectively fixing or releasing the bit 102 on the receiving device 106. The fixing sleeve 124 is designed such that a fixing of a bit 102 received on the receiving device 106 can be activated or deactivated by axially displacing the fixing sleeve 124 along a bit sleeve 126. If the fixing sleeve 124 is pushed forward in the direction of the bit 102 (i.e., to the left according to Figure 12), a ball clamp (not shown) fixing the bit 102 inside the fixing sleeve 124 can be released and the bit 102 can be removed from the receiving device 106 with little effort. However, if the fixing sleeve 124 is pushed backwards away from the bit 102 (ie to the right as shown in Figure 12), the ball clamp inside the fixing sleeve 124 can engage the bit 102 and fix it to the receiving device 106.This mechanism can be conveniently operated with one hand.

[0106] The above-described shock load protection device 110 advantageously functions to absorb the impact movement acting on the fixing sleeve 124 of the bit holder 100 when it strikes an anchoring base. The shock load protection device 110 thus provides particular protection against damage or even destruction of the fixing sleeve 124. As shown in Figure 12, the front-side shock load protection device 110 shields the fixing sleeve 124, which is protected behind it, from direct mechanical impact with the anchoring base.

[0107] Figure 12 further shows that the bit holder 100 additionally has the collar-shaped bit sleeve 126, which has the receiving device 106 and over which the fixing sleeve 124 is mounted or pushed. Thus, the fixing sleeve 124 is mounted or pushed over the bit sleeve 126 on the drive tool side. Furthermore, the shock load protection device 110 is mounted on the bit side above the bit sleeve 126, for example, screwed thereon.

[0108] If the tool coupling 108 is mounted on the drive tool and a drive tip 152 of the bit 102 engages an inversely shaped drive of a head of the fastening element, which is placed with its tip on an anchoring base, the bit holder 100, the bit 102, and the fastening element are also driven in rotation by rotating the drive tool. As a result, the fastening element, designed, for example, as a wood screw, penetrates the anchoring base, which is made of wood, for example, in a rotating manner. If the fastening element is inserted deeply into the anchoring base so that its bit-side end (for example, a screw head) also penetrates the anchoring base, from a certain penetration depth the front surface of the shock load protection device 110 comes into contact with a flat outer surface of the anchoring base.However, due to the inclination of the inclined surface 116 relative to the flat anchoring base, an uninhibited frontal collision between the bit holder 100 and the anchoring base is avoided. Instead, an oblique and frictional force transmission occurs, which favorably influences the impact load acting on the bit holder 100. The rotation of the fastening element together with the bit holder 100 when inserting the fastening element into the anchoring base leads to a high friction force when the impact load protection device 110 touches the anchoring base, which inhibits further penetration of the fastening element and the bit holder 100 into the anchoring base. The phenomena described advantageously reduce the impact load acting on the bit holder 100 and in particular on its fixing sleeve 124.

[0109] Since the shock load protection device 110 projects radially beyond the rest of the bit holder 100 along an entire circumference of the bit holder 100, the shock load protection device 110 protects in particular the fixing sleeve 124 from lateral mechanical influences.

[0110] Figure 13 shows a side view of a bit holder 100 with a bit 102 received thereon. Figure 14 shows a side view of the bit holder 100 according to Figure 13, but separated from the bit 102. Figure 15 shows a side view of the bit holder 100 according to Figures 13 and 14, but without the bit 102 and separated from a shock load protection device 110. Figure 32 shows a side view of a shock load protection device 110 of the bit holder 100 according to Figures 13 to 15.

[0111] In particular, Figure 15 shows that the shock load protection device 110 can be replaceably attached to the bit holder 100. More specifically, the shock load protection device 110 can be screwed or threaded onto an external thread 138 of the bit sleeve 126. An internal thread 140 of the shock load protection device 110 can be screwed onto the external thread 138 at the bit-side end of the bit sleeve 126. In this way, the shock load protection device 110, which is particularly exposed to mechanical stress during the setting process of the fastening element, can be unscrewed from the bit holder 100 after wear and replaced with a new shock load protection device 110.

[0112] Optionally, one end of the bit sleeve 126 can protrude slightly in the axial direction or along the central axis 117 relative to the annular end face 118 of the shock load protection device 110, thereby forming a hollow-cylindrical annular socket 120 (for example, with an axial length of 1-2 mm) that merges into the annular end face 118 at a step 122. Such an annular socket 120 can advantageously be used for welding the front of the shock load protection device 110 to the bit sleeve 126. Such optional welding of the shock load protection device 110 to the bit sleeve 126 can be advantageous if a particularly robust design of the bit holder 100 is desired. Under particularly harsh operating conditions, a screwed-on shock load protection device 110 can undesirably detach from the bit sleeve 126 during operation. This can be prevented by welding.A particularly high level of robustness can be achieved if the welding of the shock load protection device 110 to the bit sleeve 126 takes place on an axial front side and on an axial rear side of the shock load protection device 110.

[0113] As can be seen in Figure 15, the fixing sleeve 124 extends in the axial direction along an axial extension I of only approximately 35% of the axial extension L of the bit sleeve 126. The shock load protection device 110 extends in the axial direction along an axial extension b of only approximately 20% of the axial extension L of the bit sleeve 126. This enables the fixing sleeve 124 and the shock load protection device 110 to be attached to the fixing sleeve 126 without negatively affecting the function and handling of the fixing sleeve 124 and the shock load protection device 110.

[0114] According to Figure 32, an acute angle ß between the inclined surface 116 and a central axis 117 of the bit holder 100 deviates from a right angle by only approximately 15-20°. Such angles ß represent a good compromise between favorable impact force damping and avoiding susceptibility to tipping.

[0115] Figure 16 shows a side view of a bit holder 100 with a bit 102 accommodated thereon. Figure 17 shows a side view of the bit holder 100 according to Figure 16 without bit 102.

[0116] According to Figures 16 and 17 (unlike Figure 32), the annular end surface 118 of the shock load protection device 110 forms an axial end of the bit holder 100 when the spacer ring 200 is not in place. The bit sleeve 126 has one end inside the shock load protection device 110, or said end can be aligned with the annular end surface 118.

[0117] Figure 18 shows a side view of a bit holder 100 with a bit 102 received thereon. Figure 19 shows a side view of the bit holder 100 according to Figure 18 without a bit.

[0118] According to Figures 18 and 19, an outer surface of the fixing sleeve 124 is provided, at least in sections, with a knurling 154, which facilitates the handling of the fixing sleeve 124 for fixing or releasing the bit 102 by sliding the fixing sleeve 124 back and forth on the bit sleeve 126. In other words, the knurling 154 simplifies the gripping of the fixing sleeve 124 by a user.

[0119] Figure 20 shows a three-dimensional view of a bit holder 100 with a bit 102 received thereon. Figure 21 shows another three-dimensional view of the bit holder 100 according to Figure 20. Figure 22 shows another three-dimensional view of the bit holder 100 according to Figures 20 and 21. Figure 23 shows a three-dimensional view of the bit holder 100 without a bit, corresponding to Figure 22.

[0120] Figure 20 to Figure 23 illustrate with their various spatial

[0121] Views of various features of the bit holder 100. In particular, Figure 23 shows that the receiving device 106 has a hexagon socket 128 for receiving an external hexagon of the bit 102.

[0122] Figures 24 to 28 show side views of a bit holder 100 with a bit 102 received thereon during a method for introducing a fastening element 114 into an anchoring base 112.

[0123] Figures 24 to 28 show an arrangement 150 comprising a schematically illustrated drive tool 104, a bit holder 100, a bit 102, a fastening element 114, and an anchoring base 112. A chuck of the drive tool 104, which may be, for example, a cordless screwdriver, is coupled to the tool coupling 108 of the bit holder 100. The fastening element 114, designed as a wood screw (for example, an ASSY® screw from the applicant Würth), has a recess on the head 134 as a drive (not shown), into which a drive tip 152 of the bit 102 is inserted to enable torque transmission from the bit 102 to the fastening element 114. As shown in Figure 24 to Figure 28, the fastening element 114 attached to the bit 102 is inserted into the anchoring base 112 formed of wood by rotating the drive tool 104.

[0124] As shown in Figure 26, an outer diameter D of the shock load protection device 110 is larger than a maximum outer diameter d of the head 134 of the fastening element 114.

[0125] A method for inserting the fastening element 114 into the anchoring base 112 by means of the bit 102 and the drive tool 104 as well as by means of the bit holder 100 is described in more detail below:

[0126] Referring to Figure 24, the tool coupling 108 of the bit holder 100 is coupled to the drive tool 104. Furthermore, the bit 102 is received in the receiving device 106 of the bit holder 100. Referring to Figure 25, the drive tip 152 of the bit 102 is inserted into the drive in the head 134 of the fastening element 114, thereby forming a positive connection.

[0127] Referring to Figure 26, the fastening element 114 is then inserted into the anchoring base 112 by applying a combined axial and rotational force using the bit 102, the drive tool 104, and the bit holder 100. This can be done with or without forming a pilot hole in the anchoring base 112. During screwing, an external thread 156 on a shank of the fastening element 114 can cut a counter-thread in the anchoring base 112. This allows the fastening element 114 to be placed in the wood-containing anchoring base 112 and anchored there. In the state according to Figure 26, an end face of the head 134 of the fastening element 114 is aligned with a flat outer surface of the anchoring base 112.

[0128] Referring to Figure 27, it is shown what happens when the fastening element 114 penetrates even deeper into the anchoring base 112. First, the head 134 of the fastening element 114 penetrates further into the anchoring base 112, so that the bit 102 is also partially located inside the anchoring base 112. When the fastening element 114 is inserted into the anchoring base 112, the head 134 of the fastening element 114, driven by the bit 102, is inserted deeper into the anchoring base 112 beyond the outer surface of the anchoring base 112. The inclined surface 116 of the shock load protection device 110 then abuts the outer surface of the anchoring base 112. This inclined contact reduces the impact force acting on the bit holder 100.A strong frictional force upon further rotation of the shock load protection device 110 on the outer surface of the anchoring base 112 also inhibits further penetration of the fastening element 114 into the anchoring base 112 and therefore further limits the load acting on the bit holder 100. Thus, by equipping the bit holder 100 with the shock load protection device 110, the shock load acting on the bit holder 100 upon impact with the anchoring base 112 is reduced, and the bit holder 100 is therefore mechanically protected.

[0129] Referring to Figure 28, it is shown how the drive tool 104, including the bit holder 100 and bit 102, can be removed from the fastening element 104 inserted into the anchoring base 112. The insertion process is completed without damaging the bit holder 100.

[0130] Figures 29 to 31 show side views of bit holders 100 with bits 102 received thereon during insertion of a fastening element 114 into an anchoring base 112.

[0131] Referring to Figure 29, a scenario with an extended bit sleeve 126 and a bit 102 of a conventional length is shown.

[0132] Referring to Figure 30, a scenario with a bit sleeve 126 of a common length and a bit 102 of a common length is shown.

[0133] Referring to Figure 31, a scenario with a bit sleeve 126 of a conventional length and a shortened bit 102 is shown.

[0134] Figure 29 to Figure 31 therefore shows that it is possible to adjust the bit projection, the length of the bit 102 and the length of the bit sleeve 120.

[0135] Additionally, it should be noted that "comprising" does not exclude other elements or steps, and "a" or "an" does not exclude a plurality. Furthermore, it should be noted that features or steps described with reference to one of the above embodiments may also be used in combination with other features or steps of other embodiments described above. Reference signs in the claims are not to be considered as limitations.

Claims

P a t e n t a n s p r ü c h e 1. A bit holder (100) for holding a bit (102) for coupling the bit (102) to a drive tool (104), the bit holder (100) comprising: a receiving device (106) designed to receive the bit (102); a tool coupling (108) designed to couple to the drive tool (104); a shock load protection device (110) designed to protect against a shock load acting on the bit holder (100), in particular on a fixing sleeve (124) of the bit holder (100), when the bit holder (100) strikes an obstacle (301) when a fastening element (114) to be driven by means of the bit (102), the drive tool (104) and the bit holder (100) is introduced, in particular rotatingly introduced, into an anchoring base (112);and a spacer ring (200) detachably attached to the shock load protection device (110) on one side in an insertion direction (119), wherein a through-opening (202) is provided in the spacer ring (200) and is configured to pass the fastening element (114) therethrough to bring it into contact with the bit (102); 2. Bit holder (100) according to claim 1, wherein the spacer ring (200) is configured to strike the obstacle (301) when the fastening element (114) is introduced into the anchoring base (112), so that the shock load protection device (110) together with the spacer ring (200) defines a maximum penetration depth of the fastening element (114) into the anchoring base (112).

3. Bit holder (100) according to one of the preceding claims, wherein the shock load protection device (110) has an end face (203) perpendicular to an insertion direction (119), in particular designed as an annular end face (203), against which an inner surface (204), in particular an inner ring surface (204), of the spacer ring (200) rests.

4. Bit holder (100) according to the preceding claim, wherein the shock load protection device (110) has an inclined surface (116) arranged at the rear of the end face (203) opposite an insertion direction (119) and oriented perpendicular to the insertion direction (119), in particular designed as an annular inclined surface (116).

5. Bit holder (100) according to the preceding claim, wherein the shock load protection device (110) has an end face (118) which continues radially inward from the annular inclined surface (116) and is oriented perpendicular to the insertion direction (119), in particular designed as an annular end face (118).

6. Bit holder (100) according to one of the preceding claims, with at least one of the following features: the spacer ring (200) has an inner surface (205) which surrounds an outer surface (1101) of the shock load protection device (110), preferably at least partially abutting thereon; at an edge of the inner surface (205) opposite the inner surface (204) of the spacer ring (200) is provided with a radially inwardly projecting collar (206), through which an inner diameter of the inner surface (205) is tapered, wherein preferably an inner diameter (d3) at the collar (206) is smaller than an inner diameter (d2*) of the inner lateral surface (205); the spacer ring (200) is made of an elastic material, preferably of a soft plastic or of soft fiber-reinforced plastic.

7. Bit holder (100) according to one of the preceding claims, with at least one of the following features: the shock load protection device (110) is replaceably attached to the bit holder (100), in particular screwable; the shock load protection device is fixedly attached to the bit holder; the shock load protection device (110) is formed integrally with a bit sleeve (126) of the bit holder (100), in particular welded and / or riveted to the bit sleeve (126); the bit sleeve (126) has an external thread (138) onto which an internal thread (140) of the shock load protection device (110) can be screwed or is screwed; the shock load protection device (110) extends circumferentially closed around the bit (102) when the bit (102) is received in the receiving device (106); the shock load protection device (110) is made of a non-magnetic material;the bit holder (100) has a fixing sleeve (124) for fixing the bit (102) to the receiving device (106), wherein the fixing sleeve (124) is designed to selectively fix or release a bit (102) received in the receiving device (106) by means of displacement of the fixing sleeve (124); the shock load protection device (110) is designed to absorb an impact movement acting on the fixing sleeve (124) of the bit holder (100) when striking the obstacle (301) without the shock load protection device (110); the bit holder (100) has a bit sleeve (126), in particular having the receiving device (106), over which the fixing sleeve (124) is mounted; the fixing sleeve (124) is mounted on the drive tool side, and the shock load protection device (110) is mounted on the bit side above the bit sleeve (126); the fixing sleeve (124) extends in the axial direction along a maximum of 50%, in particular along a maximum of 40%, of an axial extension (L) of the bit sleeve (126); the shock load protection device (110) extends in the axial direction along a maximum of 30%, in particular along a maximum of 20%, of an axial extension (L) of the bit sleeve (126); the receiving device (106) has a hexagon socket (128); the tool coupling (108) has an external hexagon (130); the shock load protection device (110) projects radially beyond the rest of the bit holder (100) along an entire circumference of the bit holder (100).

8. Bit holder (100) according to one of the preceding claims, with at least one of the following features: a height (h*) between the inner surface (204) of the spacer ring (200) and an opposite surface of the collar (206) is between 3 and 10 mm, preferably between 4 and 6 mm; an inner diameter (d3) at the collar (206) is between 28 and 22 mm, preferably between 27 and 25 mm; an inner diameter (d2*) of the inner circumferential surface (205) of the spacer ring (200) is between 27 and 29 mm, preferably between 28 and 28.5 mm; an outer diameter (dl) of the spacer ring (200) is between 29 and 34 mm, preferably between 30 and 33 mm; a wall thickness (s) between the inner surface (204) of the spacer ring (200) and an opposite, outer end face of the spacer ring (200) is between 0.5 and 3 mm, preferably between 1 and 2 mm.

9. A set for introducing a fastening element (114) into an anchoring base (112), the set comprising: the bit holder (100) according to one of the preceding claims for holding the bit (102) for coupling the bit (102) to a drive tool (104); the bit (102) which is received or receivable on the receiving device (106) of the bit holder (100); and a set of several of the spacer rings (200) which have different wall thicknesses (s1, s2, s3) between the inner surface (204) of the spacer ring (200) and an opposite, outer end surface of the spacer ring (200).

10. An arrangement for introducing a fastening element (114) into an anchoring base (112), the arrangement comprising: the bit holder (100) according to one of claims 1 to 8 for holding a bit (102) for coupling the bit (102) to a drive tool (104); the bit (102) being received or receivable on the receiving device (106) of the bit holder (100); and a spacer device (300) which is configured to be placed on an anchoring base (112) and to receive the bit holder (100) in such a way that the end face (203) of the shock load protection device (110) or the spacer ring (200) strikes a stop surface (301) of the spacer device (300) forming the obstacle (301) when the fastening element (114) is introduced into the anchoring base (112), so that the fastening element (114) can only be introduced into the anchoring base (112) to a predetermined depth.

11. Arrangement according to the preceding claim, wherein the spacer device (300) has a guide (302), preferably a guide channel (302), for the fastening element (114), which extends perpendicular to the stop surface (301) of the spacer device (300), wherein the guide (302) preferably has an inner metal profile (309) for protection against abrasion.

12. Arrangement according to the preceding claim, wherein the guide (302) comprises a fiber-reinforced plastic profile or a sleeve (309) made of metal or plastic, which is exchangeably arranged in the spacer device (300), wherein the sleeve (309) is preferably held in the shaft of the spacer device (300) by a screw (314) provided in a shaft of the spacer device (300); further preferably, a set of sleeves (309) with different inner diameters is provided.

13. Arrangement according to claim 11 or 12, wherein the guide (302) has a lateral opening (303) which is configured so that the spacer device (300) can be removed from the anchoring base (112) when the fastening element (114) is inserted.

14. Arrangement according to one of claims 11 to 13, wherein the guide (302) is inclined at an angle to the anchoring base (112), wherein the angle of inclination is preferably adjustable and fixable.

15. Arrangement according to one of the preceding claims 11 to 14, wherein the guide (302) has a funnel-shaped widening (304) at an inlet for the fastening element (114).

16. Arrangement according to one of claims 10 to 15, with at least one of the following features: an outer contour of the spacer device (300) is shaped as a handle; the spacer device (300) has a base plate (305) for resting on the anchoring base (112), wherein preferably tips (306) protrude from an underside of the base plate (305), and / or wherein preferably markings (307) are provided on an edge of the base plate (305) which indicate an exit position of the fastening element (114) from the base plate (305);the spacer device (300) has a base plate (305) for resting on the anchoring base (112), wherein preferably at least one receptacle for one or more bits (102) is provided on the base plate (305), and / or wherein preferably through holes (313) are provided in the base plate (305) through which screws can be passed for temporarily fixing the spacer device (300) to the anchoring base (112), wherein more preferably the through holes (313) are provided in raised sections on the base plate (305); the spacer device (300) has a further handle (308), in which preferably a recess (312) is provided, into which the bit holder (100) can be inserted or snapped in order to store the bit holder (100) therein; the spacer device (300) comprises a magnet or a brush ring inside the guide, which is configured to hold the fastening element (114);the fastening element (114) is a wood screw.; 17. A method for introducing a fastening element (114) into an anchoring base (112) by means of the arrangement according to one of claims 10 to 16, the method comprising: Picking up the bit (102) on the receiving device (106) of the bit holder (100); Coupling a tool coupling (108) of the bit holder (100) to a drive tool (104); Placing the base plate (305) on the anchoring base (112); Bringing the bit (102) into contact with the fastening element (114), preferably with a head of the fastening element (114); Inserting the bit holder (100) and the fastening element (114) into the spacer device (300), preferably into a guide (302) of the spacer device (300); Inserting, in particular rotating, the fastening element (114) into the anchoring base (112) by applying an insertion force acting on the fastening element (114) by means of the bit (102), the drive tool (104) and the bit holder (100) until the end face (203) of the shock load protection device (110) or the spacer ring (200) of the bit holder (100) strikes the stop surface (301) of the spacer device (300), so that the fastening element (114) is inserted into the anchoring base (112) to a predetermined depth; and Removing the spacer device (300), preferably by lateral displacement, wherein the fastening element (114) passes through a lateral opening (303) of the guide (302).

18. Method according to the preceding claim, wherein after the insertion of the bit holder (100) and the fastening element (114) into the spacer device (300) and preferably also after the Bringing the bit (102) into contact with the fastening element (114), the spacer device (300) is tilted such that the fastening element (114) is placed substantially perpendicularly onto the anchoring base (112) and pressed into the anchoring base (112); and then the base plate (305) is placed flat against the anchoring base (112).

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