US20160008893A9 - Tool attachment for a hand-held machine tool - Google Patents
Tool attachment for a hand-held machine tool Download PDFInfo
- Publication number
- US20160008893A9 US20160008893A9 US14/084,338 US201314084338A US2016008893A9 US 20160008893 A9 US20160008893 A9 US 20160008893A9 US 201314084338 A US201314084338 A US 201314084338A US 2016008893 A9 US2016008893 A9 US 2016008893A9
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- US
- United States
- Prior art keywords
- locking
- tool
- hand
- held machine
- machine tool
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
- B23B31/02—Chucks
- B23B31/10—Chucks characterised by the retaining or gripping devices or their immediate operating means
- B23B31/12—Chucks with simultaneously-acting jaws, whether or not also individually adjustable
- B23B31/1207—Chucks with simultaneously-acting jaws, whether or not also individually adjustable moving obliquely to the axis of the chuck in a plane containing this axis
- B23B31/123—Chucks with simultaneously-acting jaws, whether or not also individually adjustable moving obliquely to the axis of the chuck in a plane containing this axis with locking arrangements
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
- B25F3/00—Associations of tools for different working operations with one portable power-drive means; Adapters therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2240/00—Details of connections of tools or workpieces
- B23B2240/04—Bayonet connections
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
- B23B31/02—Chucks
- B23B31/10—Chucks characterised by the retaining or gripping devices or their immediate operating means
- B23B31/12—Chucks with simultaneously-acting jaws, whether or not also individually adjustable
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T279/00—Chucks or sockets
- Y10T279/17—Socket type
- Y10T279/17615—Obliquely guided reciprocating jaws
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T279/00—Chucks or sockets
- Y10T279/32—Means to prevent jaw loosening
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T408/00—Cutting by use of rotating axially moving tool
- Y10T408/94—Tool-support
- Y10T408/95—Tool-support with tool-retaining means
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gripping On Spindles (AREA)
- Percussive Tools And Related Accessories (AREA)
- Automatic Tool Replacement In Machine Tools (AREA)
Abstract
In a tool attachment for fastening to a fastening interface of a hand-held machine tool, having a locking unit which in an unlocked state makes it possible for the tool attachment to be placed on the fastening interface of the hand-held machine tool and in a locked state makes it possible for the tool attachment to be locked to the fastening interface of the hand-held machine tool for operation, the locking unit having a rotatable locking body, and a first rotational position of the locking body being associated with the unlocked state and a second rotational position of the locking body being associated with the locked state, the locking unit has a locking member which is configured to prevent rotation of the locking body from the second rotational position into the first rotational position in the locked state.
Description
- The present application claims priority to Application No. DE 10 2012 221 320.1, filed in the Federal Republic of Germany on Nov. 22, 2012, and Application No. DE 10 2013 213 804.0, filed in the Federal Republic of Germany on Jul. 15, 2013, the contents of each of which are expressly incorporated herein by reference thereto.
- The present invention relates to a tool attachment for fastening to a fastening interface of a hand-held machine tool, having a locking unit which in an unlocked state makes it possible for the tool attachment to be placed on the fastening interface of the hand-held machine tool and in a locked state makes it possible for the tool attachment to be locked to the fastening interface of the hand-held machine tool for operation, the locking unit having a rotatable locking body which in the unlocked state is disposed in a first rotational position and in the locked state is disposed in a second rotational position on the fastening interface of the hand-held machine tool.
- A tool attachment which has a locking unit for fastening to a fastening interface of a hand-held machine tool is known from the related art. That locking unit serves to lock the tool attachment to the hand-held machine tool in an associated locked state in order to render possible operation of the tool attachment on the hand-held machine tool by transfer of a driving torque from the hand-held machine tool to the tool attachment. For that purpose, the locking unit has a rotatable locking body on which locking elements configured in the manner of bayonets are provided to form a bayonet connection with the fastening interface of the hand-held machine tool.
- A disadvantage with the related art is that such a bayonet connection may come undone automatically as a result of vibrations which occur in operation of the hand-held machine tool. That may result in damage to the tool attachment and/or to the hand-held machine tool and also in injuries to the user of the hand-held machine tool.
- It is therefore an object of the present invention to provide a novel tool attachment for fastening to a fastening interface of a hand-held machine tool, with which, after locking to the fastening interface of the hand-held machine tool, automatic detachment therefrom may be prevented.
- That object is attained by a tool attachment for fastening to a fastening interface of a hand-held machine tool, having a locking unit which in an unlocked state makes it possible for the tool attachment to be placed on the fastening interface of the hand-held machine tool and in a locked state makes it possible for the tool attachment to be locked to the fastening interface of the hand-held machine tool for operation. The locking unit has a rotatable locking body, a first rotational position of the locking body being associated with the unlocked state and a second rotational position of the locking body being associated with the locked state. The locking unit has a locking member which is configured to prevent rotation of the locking body from the second rotational position into the first rotational position in the locked stated.
- The present invention accordingly makes it possible to provide a tool attachment with which, in operation of an associated hand-held machine tool to which the tool attachment is locked in the locked state, an automatic detachment of the locking body of the tool attachment from the fastening interface of the hand-held machine tool may be safely and reliably prevented by the locking member.
- According to one exemplary embodiment, the locking member is configured to cooperate in the locked state with a locking element associated with the fastening interface of the hand-held machine tool.
- It is thus possible to provide in a simple manner a stable and robust locking arrangement.
- The locking element has preferably at least one set of locking teeth.
- It is thus possible to provide a locking element that may be produced quickly and in an uncomplicated manner.
- According to one exemplary embodiment, the locking member is of a resilient configuration at least in regions and has at least one locking portion which in the locked state is urged toward the fastening interface of the hand-held machine tool by an elastic deformation of the locking member.
- The present invention thus makes it possible to provide a locking member that is safe in operation and inexpensive.
- Preferably, the locking portion is configured to engage the set of locking teeth in the locked state in order to prevent the rotation of the locking body from the second rotational position into the first rotational position.
- Thus, a safe and robust blocking of an automatic rotation of the locking body in the locked state of the locking unit may be made possible.
- According to one exemplary embodiment, the locking unit has an actuating element which is configured to make possible a rotation of the locking body from the first into the second rotational position.
- The present invention thus makes it possible to provide a tool attachment whose locking unit is configured for simple and user-friendly handling.
- The locking body is preferably at least partly tubular and the actuating element is rotatably supported on the outer periphery of the locking body.
- Thus, stable and uncomplicated supporting of the actuating element on the locking body may be made possible.
- According to one exemplary embodiment, at least one driver element is provided on the actuating element and at least one driven member is provided on the locking body, the driver element and the driven member being configured to cooperate for rotary entrainment of the locking body upon actuation of the actuating element to rotate the locking body from the first into the second rotational position.
- The present invention thus makes it possible to provide a tool attachment in which safe and reliable rotary entrainment of the locking body by the actuating element may be ensured.
- Preferably, the driven member is configured to make possible a rotational movement of the actuating element relative to the locking body at least by a predetermined rotation angle.
- Thus, a relative movement between actuating element and locking body may be made possible, which relative movement may be used according to the present invention to activate or deactivate the locking member.
- The actuating element is preferably configured to urge the locking member in the locked state at least in portions toward the fastening interface of the hand-held machine tool.
- Thus, the locking function of the locking member in the locked state of the locking unit may be effectively maintained by the actuating element.
- Preferably, the actuating element has a control curve which is configured to enable the locking member to be urged at least in portions toward the fastening interface of the hand-held machine tool in the locked state.
- Thus, a stable urging of the locking member in the locked state of the locking unit may be made possible in a simple manner.
- According to one exemplary embodiment, there is associated with the actuating element a blocking member which is configured to block the actuating element in a blocking position at the locking body in the locked state, in which blocking position the actuating element urges the locking member at least in portions toward the fastening interface of the hand-held machine tool.
- The present invention thus makes it possible to provide a tool attachment in which the actuating element may be safely and reliably blocked at the locking body upon urging of the locking member.
- The blocking member is preferably of a resilient configuration at least in regions and has a blocking portion which in the blocking position may be releasably fixed in a fixing member provided on the locking body.
- Thus, a robust and inexpensive blocking member may be provided.
- Preferably, the fixing member is configured in the manner of a recess and the blocking portion is configured to snap into the fixing member in the blocking position in order to prevent automatic rotation of the actuating element relative to the locking body in the locked state.
- Thus, an operationally safe and reliable engagement of the actuating element at the locking body may be made possible.
- The locking member and the blocking member are preferably constructed in one piece.
- Thus, a simple and inexpensive single component may be used to implement the locking member and the blocking member.
- According to one exemplary embodiment, the locking body has locking elements which are configured in the manner of bayonets to form a bayonet connection with the fastening interface of the hand-held machine tool.
- The present invention thus makes it possible to provide a tool attachment that is safely and reliably connectable to the fastening interface of the hand-held machine tool by a robust and stable bayonet connection.
- The object mentioned in the introduction is also attained by a hand-held machine tool having a fastening interface for fastening of a tool attachment which has a locking body which is lockable to the fastening interface. There is associated with the fastening interface a locking element which is configured to lock a rotationally secured locking of the locking body of the tool attachment to the fastening interface.
- Furthermore, the object mentioned in the introduction is also attained by a tool system having a hand-held machine tool which has a fastening interface, and having a tool attachment for fastening to the fastening interface of the hand-held machine tool. The tool attachment has a locking unit which in an unlocked state makes it possible for the tool attachment to be placed on the fastening interface of the hand-held machine tool and in a locked state makes it possible for the tool attachment to be locked to the fastening interface of the hand-held machine tool for operation. The locking unit has a rotatable locking body which in the unlocked state is disposed in a first rotational position and in the locked state is disposed in a second rotational position on the fastening interface of the hand-held machine tool. The locking unit has a locking member which is configured to prevent rotation of the locking body from the second rotational position into the first rotational position in the locked state.
- In addition, the object mentioned in the introduction is also attained by a hand-held machine tool having a fastening interface for rotationally secured fastening of a tool attachment, wherein the fastening interface is fastened to a gear unit housing of the hand-held machine tool.
- The present invention thus makes it possible to provide a hand-held machine tool of a compact and robust construction.
- Preferably, the hand-held machine tool has a tool holder for receiving an inserted tool, which tool holder has a spring-loaded locking sleeve for locking the inserted tool, wherein the locking sleeve may be pushed at least partly into the fastening interface.
- Thus, it is possible to provide a hand-held machine tool of a shorter overall length.
- Preferably, the fastening interface is configured to enable a fastening of the tool attachment to the gear unit housing, which fastening is oriented in a predetermined angular position.
- Thus, an application-specific orientation of the tool attachment on the hand-held machine tool may be made possible in a simple manner.
- Preferably, an at least partly conical centering aid is provided at the fastening interface for axial centering of the tool attachment.
- Thus, a stable and reliable axial centering of the tool attachment on the hand-held machine tool may be made possible.
- Preferably, there is associated with the fastening interface a locking element which is configured to lock a rotationally secured locking, to the fastening interface, of a locking body of the tool attachment, which locking body is lockable to the fastening interface.
- It is thus possible for automatic detachment of the locking body of the tool attachment from the fastening interface of the hand-held machine tool in operation thereof to be safely and reliably prevented by the locking member.
- Exemplary embodiments of the present invention are described in detail in the following with reference to the accompanying drawings.
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FIG. 1 shows a schematic view of a hand-held machine tool with a tool holder and a fastening interface according to one exemplary embodiment. -
FIG. 2 shows a sectional view of a tool attachment that may be fastened to the fastening interface of the hand-held machine tool ofFIG. 1 , having a locking body and an actuating element according to one exemplary embodiment. -
FIG. 3 shows a perspective view of the locking body ofFIG. 2 . -
FIG. 4 shows a perspective view of the locking body ofFIG. 3 with a locking member according to one exemplary embodiment. -
FIG. 5 shows a perspective view of the locking body ofFIG. 4 with a blocking member according to one exemplary embodiment. -
FIG. 6 shows a perspective view of the actuating element ofFIG. 2 according to one exemplary embodiment, with the locking member ofFIG. 4 and the blocking member ofFIG. 5 . -
FIG. 7 shows a perspective view of the actuating element ofFIG. 6 . -
FIG. 8 shows a perspective view of the actuating element ofFIG. 6 , without the locking member ofFIG. 4 . -
FIG. 9 shows a sectional view of the actuating element ofFIG. 2 supported on the locking body ofFIG. 2 . -
FIG. 10 shows a sectional view of a tool system according to one exemplary embodiment, with the tool attachment ofFIG. 2 placed on the hand-held machine tool ofFIG. 1 . -
FIG. 11 shows a sectional view of the tool system ofFIG. 10 upon locking of the tool attachment to the hand-held machine tool. -
FIG. 12 shows a sectional view of a tool system according to one exemplary embodiment, with the tool attachment ofFIG. 2 having a locking unit configured according to an alternative exemplary embodiment, placed on the hand-held machine tool ofFIG. 1 . -
FIG. 13 shows a sectional view of a tool attachment according to an alternative exemplary embodiment, with a fastening interface for fastening to the hand-held machine tool ofFIG. 1 . -
FIG. 14 shows a sectional view of a tool system according to an alternative exemplary embodiment, with the tool attachment ofFIG. 13 fastened to the hand-held machine tool ofFIG. 1 . -
FIG. 1 shows a hand-heldmachine tool 100 provided with atool holder 140 and having ahousing 110 with ahand grip 126, and also shows an enlarged detail of hand-heldmachine tool 100. According to one exemplary embodiment, hand-heldmachine tool 100 is mechanically and electrically connectable to abattery pack 130 for mains-independent power supply. - Hand-held
machine tool 100 is configured by way of example as a battery-powered rotary impact screwdriver. It is pointed out, however, that the present invention is not limited to battery-powered rotary impact screwdrivers but rather may be used in different hand-held machine tools having a tool holder corresponding totool holder 140, irrespective of whether the hand-held machine tool is operable electrically, that is, mains-independently usingbattery pack 130 or mains-dependently, and/or non-electrically. - Disposed in
housing 110 are anelectric drive motor 114 supplied with power bybattery pack 130, and agear unit 118 and anoptional impact mechanism 122.Drive motor 114 is operable, that is, may be switched on or off, by amanual switch 128, for example, and is preferably electronically controllable by closed or open loop control such that both reversing operation and settings in respect of a desired speed of rotation may be implemented. - According to one exemplary embodiment, drive
motor 114 is an electronically commutated drive motor, preferably a DC motor having by way of illustration stator androtor components stator components 111 form by way of example an outer stator androtor components 117 form by way of example an inner rotor. It is pointed out, however, that the description of a drive motor constructed in the manner of an electronically commutated drive motor with outer stator and inner rotor is purely of an illustrative nature and is not to be construed as a limitation of the present invention which may also be used in the case of a drive motor having an inner stator and an outer rotor or, for example, in the case of a commutator motor having brushes. -
Drive motor 114 is connected via an associatedmotor shaft 116 togear unit 118 which converts rotation ofmotor shaft 116 into rotation of adrive member 120, for example a drive shaft, provided betweengear unit 118 andimpact mechanism 122. That conversion preferably takes place such thatdrive member 120 rotates relative tomotor shaft 116 with an increased torque but at a reduced speed of rotation. By way of illustration, drivemotor 114 is disposed in amotor housing 115 andgear unit 118 is disposed in agear unit housing 119,gear unit housing 119 andmotor housing 115 being disposed by way of example inhousing 110. -
Optional impact mechanism 122 which is connected to drivemember 120 is by way of example a rotary impact mechanism which produces high-intensity impact-like rotary pulses and transmits them to adrive shaft 124, for example a drive spindle. An example of an impact mechanism with whichimpact mechanism 122 may be implemented is described in German Utility Model DE 20 2006 014 850 U1 to which reference is explicitly made here and the teachings of which are incorporated herein by reference and are to be understood as forming part of the present description, so that a detailed description ofimpact mechanism 122 may be dispensed with here for conciseness. - Constructed at
drive shaft 124 istool holder 140 which by way of illustration has a receivingbody 147 with internalpolygonal receptacle 148 which is provided to receive inserted tools with external polygonal couplings. On the outer periphery of receivingbody 147, which is rotationally rigidly connected and/or integrally connected, for example, to driveshaft 124, there is disposed by way of example a lockingsleeve 149 for locking suitable inserted tools in internalpolygonal receptacle 148, which lockingsleeve 149 is spring-loaded by a spring element in anaxial direction 199 pointing away from hand-heldmachine tool 100. -
Tool holder 140 is constructed by way of example in the manner of a bit holder, that is, for receiving an inserted tool 170 which is constructed in the manner of a screwdriver bit and which is pushed into internalpolygonal receptacle 148 in the direction of hand-heldmachine tool 100 as indicated by anarrow 198. A screwdriver bit of that kind, which, for example, is of the so-called HEX type, is sufficiently known from the related art and therefore a detailed description will be dispensed with here for conciseness. It is pointed out, however, that the present invention is not limited to use of a HEX screwdriver bit, but rather other inserted tools may also be used depending on a respectively selected configuration oftool holder 140, for example HEX drills or so-called SDS Quick insert tools. It is furthermore pointed out that the structure and mode of operation of a suitable bit holder will also be sufficiently known to a person skilled in the art and therefore a detailed description ofbit holder 140 may be dispensed with here for conciseness. - According to one exemplary embodiment, there is associated with hand-held machine tool 100 a
fastening interface 150 which by way of illustration is fastened tohousing 110 in an axially and radially immovable manner in the region ofbit holder 140 and which is referred to hereinafter for clarity of the description as “machine interface 150”. It is pointed out, however, thatmachine interface 150 is constructed as a separate component merely by way of example and may alternatively be constructed in one piece withhousing 110. -
Machine interface 150 serves to fasten an associated tool attachment (200 inFIG. 2 ) in a rotationally secured manner, which tool attachment may, for example, be constructed in the manner of a drill chuck, an angle attachment or an eccentric attachment. By way of illustration,machine interface 150 has afastening element 151 which is fastened to afront face 112 ofhousing 110 in a rotationally secured manner.Fastening element 151 is by way of example at least partly sleeve-shaped or ring-shaped, and is fastened in the region of a terminating orprotective sleeve 158 disposed annularly onhousing 110 atfront face 112 by suitable fastening members, for example screws or rivets, but may alternatively be constructed in one piece withhousing 110.Fastening element 151 preferably at least partly surroundsbit holder 140 at a predetermined radial spacing in order to allow axial displacement of lockingsleeve 149 ofbit holder 140 in the interior offastening element 151. - According to one exemplary embodiment,
fastening element 151 has at its outer periphery at least onelocking element 155 and at least two retainingmembers element 155 preferably has at least one set of lockingteeth 156 and the at least two retainingmembers machine interface 150, in which a corresponding tool attachment (200 inFIG. 2 ) may be fastened tomachine interface 150 by a rotational movement, for example a so-called wire bail latch, etc. - By way of illustration, there is provided at
machine interface 150 an at least partly conical centeringaid 153 for axial centering of a locking unit (202 inFIG. 2 ) of an associated tool attachment (200 inFIG. 2 ),fastening element 151 being configured to enable the associated tool attachment (200 inFIG. 2 ) to be axially centered athousing 110. For that purpose, there is provided on the inner periphery of fastening element 151 a centeringsurface 159, which by way of example is annular and at least partly funnel-shaped, to form centeringaid 153. - It is pointed out, however, that centering
surface 159 is funnel-shaped only by way of example and not as a limitation of the present invention. Rather, it is also possible to implement a cone-shaped configuration at an additional centering ring. Accordingly, any reference to the term “conical” in the context of the present invention represents a reference both to a cone-shaped and to a funnel-shaped configuration of a corresponding component. Furthermore, instead of having a single annular and funnel-shaped centeringsurface 159, centeringaid 153 may also have a plurality of conical arc portions, etc. - In addition,
fastening element 151 has at least one and by way of example three optionalangle setting members 157. These are used, for example in the case of a tool attachment constructed in the manner of an angle attachment or eccentric attachment being fastened tomachine interface 150, to specify a predetermined angular position. -
FIG. 2 shows an example of atool attachment 200 which may be fastened tomachine interface 150 of hand-heldmachine tool 100 ofFIG. 1 in a rotationally secured manner.Tool attachment 200 is constructed, according to one exemplary embodiment, in the manner of a drill chuck attachment and has by way of example alocking unit 202 and a clampingchuck unit 204. It is pointed out, however, thattool attachment 200 is constructed as a drill chuck attachment only by way of example and not as a limitation of the present invention. Rather,tool attachment 200 may be of any desired configuration, for example in the manner of an angle attachment, an eccentric attachment etc. - Clamping
chuck unit 204 has by way of example a supportingbody 294 on which there is supported a plurality of clampingjaws 290 which are operable by a clampingbody 292 provided with a clampingsleeve 280 to clamp therein an associated inserted tool, for example a round drill. Supportingbody 294 is fastened in a rotationally secured manner, for example by a screwedconnection 275, to a firstaxial end 274 of an actuatingmember 270 associated with lockingunit 202, so that, upon rotational movement of actuatingmember 270, supportingbody 294 rotates therewith. Alternatively, supportingbody 294 may, for example, also be connected to actuatingmember 270 by way of a press-fit connection or may also be constructed in one piece therewith. By way of illustration, in at least partly sleeve-shapedactuating member 270, adrive shaft 268 is received in a rotationally secured manner, for example by a press-fit connection 266, so that, upon rotation ofdrive shaft 268, actuatingmember 270 rotates therewith. Alternatively, driveshaft 268 and actuatingmember 270 may also be constructed in one piece. - At a free axial end of
drive shaft 268, which by way of example is received in a second axial end region of actuatingmember 270, apolygonal driving contour 265 is provided. An outer periphery of the second axial end region of actuatingmember 270 is rotatably supported in, and preferably press-fitted in, abearing element 212 associated with lockingunit 202, for example a rolling bearing constructed in the manner of a radial bearing, so that clampingchuck unit 204 is rotatably supported at lockingunit 202.Bearing element 212 is in this case axially fixed in position in the axial direction of actuatingmember 270 between anannular shoulder 226 formed thereon and a securingring 227 fastened thereto. It is pointed out, however, that a suitable practical realization of clampingchuck unit 204 is sufficiently known from the related art and therefore a detailed description of clampingchuck unit 204 may be dispensed with here for conciseness. - According to one exemplary embodiment, locking
unit 202 is configured at least for rotationally secured fastening tomachine interface 150 of hand-heldmachine tool 100 ofFIG. 1 and, in an unlocked state, makes it possible fortool attachment 200 to be placed onmachine interface 150 and, in a locked state, makes it possible fortool attachment 200 to be locked tomachine interface 150 for operation. For that purpose, lockingunit 202 preferably has arotatable locking body 300 which in the unlocked state is disposed in a first rotational position and in the locked state is disposed in a second rotational position onmachine interface 150 of hand-heldmachine tool 100 ofFIG. 1 , as described hereinafter in the case ofFIGS. 10 and 11 . That lockingbody 300 preferably has at its inner periphery at least two retainingmembers bayonets machine interface 150 ofFIG. 1 . - According to one exemplary embodiment, locking
body 300 is at least partly tubular and forms aninterior space 216 and also anouter periphery 245 on which anexternal collar 215 is provided.External collar 215 is provided at an axial end (399 inFIG. 3 ) of lockingbody 300, which axial end is remote from clampingjaw unit 204, lockingbody 300 having at its opposite axial end (398 inFIG. 3 ) an internalannular groove 297 with aninternal securing ring 228 being fastened inannular groove 297. In addition, by way of illustration, lockingbody 300 has an internalannular shoulder 223, a centeringmember 260 being by way of example axially fixed in position in the region betweenannular shoulder 223 and securingring 228. Between that centeringmember 260 andannular shoulder 223, an elastic element 240 is preferably disposed, for example an O-ring of rubber material, a cup spring, a corrugated washer, a cylindrical compression spring etc. By way of example, bearingelement 212 is disposed atinner periphery 273 of centeringmember 260 and is preferably press-fitted therein. - Preferably, a preferably sleeve-shaped
actuating element 600 provided with anexternal grip surface 249 and having aninternal projection 241, which by way of illustration is annular, is disposed and rotatably supported onouter periphery 245 of lockingmember 300. Actuatingelement 600 is configured to make it possible for lockingbody 300 to be rotated from the first into the second rotational position. - In the region between locking
body 300 andactuating element 600, according to one exemplary embodiment a lockingmember 400 that is resilient at least in regions and a blockingmember 500 are disposed. Lockingmember 400 is fixed in position on lockingbody 300 at least by a portion, and blockingmember 500 on actuatingelement 600. According to one exemplary embodiment, lockingmember 400 is configured to prevent rotation of lockingbody 300 from its second rotational position into its first rotational position in the locked state of lockingunit 202, lockingmember 400 preferably cooperating with lockingelement 155 ofFIG. 1 associated withmachine interface 150 of hand-heldmachine tool 100 ofFIG. 1 . In this case, actuatingelement 600 is preferably configured to urge lockingmember 400 in the locked state of lockingunit 202 at least in portions towardmachine interface 150 of hand-heldmachine tool 100, as described below in the case ofFIG. 11 . Blockingmember 500 is configured according to one exemplary embodiment to blockactuating element 600, in the locked state of lockingunit 202, in a blocking position at lockingbody 300, in whichposition actuating element 600urges locking member 400 at least in portions towardmachine interface 150 of hand-heldmachine tool 100 ofFIG. 1 to prevent automatic rotation of actuatingelement 600 relative to lockingbody 300. - It is pointed out, however, that locking
member 400 described above and blockingmember 500, which is separate therefrom, are merely of an illustrative nature and do not serve to limit the present invention. Rather, locking member and blocking member may also be constructed in one piece and, for example, may together be held on the locking body, as will be described by way of example below in the case ofFIG. 12 . Furthermore, it is also pointed out that the described tubular or sleeve-shaped configurations of lockingbody 300 and ofactuating element 600 are likewise merely of an illustrative nature and are not to be construed as a limitation of the present invention. Rather, lockingbody 300 and the actuating element may, for example, each be formed from two or more arcuate elements, etc. - Centering
member 260 andmachine interface 150 of hand-heldmachine tool 100 ofFIG. 1 preferably form complementary geometric shapes which make possible an axial centering of lockingunit 202 atmachine interface 150 ofFIG. 1 and for that purpose they preferably engage with each other. Those complementary geometric shapes are configured to form a positive connection in the axial direction of lockingunit 202. For that reason, complementary geometric shapes are to be understood within the context of the present invention as being quite generally geometric shapes that are capable of being joined together to form a positive connection. - By way of illustration, centering
member 260 of lockingunit 202 has at least one at least partly conical centeringaid 220. Centeringaid 220 is provided for engagement in at least partly funnel-shaped centeringaid 153 provided atmachine interface 150 of hand-heldmachine tool 100 ofFIG. 1 , and is preferably configured at least partly in the manner of aring 221 having anouter periphery 225 that is chamfered at least in regions, at anaxial end region 262 of lockingunit 202. Alternatively, instead of havingring 221, centeringaid 220 may have, for example, a plurality of conical arc portions, etc. - For mounting of
tool attachment 200 onmachine interface 150 of hand-heldmachine tool 100 ofFIG. 1 ,tool attachment 200 is brought indirection 198 ofFIG. 1 towardmachine interface 150 and is positioned thereon such thatactuating member 270 is brought into contact with lockingsleeve 149 oftool holder 140 of hand-heldmachine tool 100, so that the free end ofdrive shaft 268 at least partly engages the empty internalpolygonal receptacle 148 oftool holder 140. Then,tool attachment 200 is moved towardmachine interface 150 indirection 198, in whichoperation actuating member 270 also moves lockingsleeve 149 indirection 198 and thus unlockstool holder 140 so that the free end ofdrive shaft 268 is pushed into internalpolygonal receptacle 148. In that operation,tool attachment 200 is pushed ontomachine interface 150 such that lockingbody 300 rests against, or rather engages around,fastening element 151 ofmachine interface 150 ofFIG. 1 so that, by actuation ofactuating element 600, lockingunit 202 may be locked tomachine interface 150 ofFIG. 1 . In that operation, at least partly conical centeringaid 220 of lockingunit 202 is brought into contact with at least partly funnel-shaped centeringaid 153 ofmachine interface 150 ofFIG. 1 . To taketool attachment 200 off hand-heldmachine tool 100 ofFIG. 1 , it is removed frommachine interface 150 ofFIG. 1 indirection 199 ofFIG. 1 after lockingunit 202 has been unlocked. - It is, however, once again pointed out that centering
aids FIG. 1 are of a conical configuration merely by way of example and not as a limitation of the present invention. Rather, as described above, they merely have to have complementary geometric shapes suitable for forming a positive connection. Accordingly, centeringaid 153 ofmachine interface 150 may, for example, as shown inFIG. 1 , be funnel-shaped while centeringaid 220 oftool attachment 200 is, for example, cylindrical or annular. Alternatively, it is possible, for example, for centeringaid 220 oftool attachment 200 to be of a conical, that is, cone-shaped or funnel-shaped, configuration as described above, while centeringaid 153 ofmachine interface 150 ofFIG. 1 is cylindrical or annular, and so on. -
FIG. 3 shows tubular lockingbody 300 ofFIG. 2 which at anaxial end 399 has on itsouter periphery 245external collar 215 and on its innerperiphery retaining member 298 constructed in the manner of a bayonet. At its oppositeaxial end 398, internalannular groove 297 and internalannular shoulder 223 are provided. In addition, ataxial end 398, by way of example threeopenings 340 for receiving associated retaining members of centeringmember 260 ofFIG. 2 are provided which, for example, are oriented radially outwardly from centeringmember 260 in the manner of projections. - According to one exemplary embodiment, at least one driven
member 330 is provided on lockingbody 300, by way of illustration atouter periphery 245 thereof. Drivenmember 330 is by way of example of a ridge-like configuration and, beginning atexternal collar 215, is oriented, for example, parallel to the axis of rotation of lockingbody 300 in the direction ofaxial end 398, as indicated byarrow 199 ofFIG. 2 . In addition, by way of illustration a fixingmember 320 is provided onexternal collar 215. Furthermore, anengagement aperture 310 is provided in the region ofexternal collar 215. -
FIG. 4 shows locking body 300 ofFIG. 3 rotated about its axis of rotation by about 180°. In contrast toFIG. 3 , as a result of the rotation, retainingmember 299 configured in the manner of a bayonet ataxial end 399 is visible here. - According to one exemplary embodiment, locking
member 400 ofFIG. 2 is fastened toouter periphery 245 of lockingbody 300. For that purpose, lockingmember 400 has afastening portion 410 which by way of example is fastened in a groove-like opening 415 ofexternal collar 215 of lockingbody 300. Beginning at thatfastening portion 410, lockingmember 400 is by way of illustration U-shaped with a lockingspring arm 417 extending, at least in regions, parallel toexternal collar 215 and with a supportingarm 419 extending, for example, parallel toarm 417. Lockingspring arm 417 engages by its free end throughengagement aperture 310 of lockingbody 300. Supportingarm 419 preferably rests completely againstouter periphery 245 of lockingbody 300. -
FIG. 5 shows locking body 300 ofFIG. 4 mirrored in the direction ofarrow 199 ofFIGS. 3 and 4 to illustrate the free end, engaging throughengagement aperture 310 thereof, of lockingspring arm 417 of lockingmember 400 ofFIG. 4 , which lockingmember 400 according to one exemplary embodiment forms a lockingportion 420. In addition,FIG. 5 shows blocking member 500 ofFIG. 2 which is disposed by way of illustration onouter periphery 245 of lockingbody 300 and which, as described in the case ofFIG. 2 and as shown inFIG. 6 , is fastened to actuatingelement 600 ofFIG. 2 and has by way of example the shape of a curly brace. - Blocking
member 500 is preferably configured to be resilient at least in regions and has a blockingportion 520 which may be releasably fixed to fixingmember 320 provided onexternal collar 215 of lockingbody 300. In this case, fixingmember 320 has at least one snap-in groove configured in the manner of a recess into which blockingportion 520, which by way of illustration is configured in the manner of a resilient snap-in projection, may be snapped. -
FIG. 6 shows sleeve-shapedactuating element 600 ofFIG. 2 with lockingmember 400 ofFIGS. 4 and 5 disposed on its inner periphery to illustratefastening portion 410 ofFIG. 4 and lockingportion 420 ofFIG. 5 . Actuatingelement 600 may have at its outer periphery 249 a grip surface that is rubberized at least in regions and which enablesactuating element 600 to be actuated comfortably and safely. - According to one exemplary embodiment, at least one
driver element 630 is provided on the inner periphery of actuatingelement 600.Driver element 630 is by way of example of a ridge-like configuration and, beginning atinternal projection 241, is oriented, for example, parallel to the axis of rotation of actuatingelement 600 in the direction of the axial end of actuatingelement 600 remote fromprojection 241, that is to say, inFIG. 2 in the direction ofarrow 198. In addition, in the region ofinternal projection 241, afastening member 620 is disposed for fastening of blockingmember 500 ofFIGS. 2 and 5 . By way of illustration,fastening member 620 has two openings in which the free ends of blockingmember 500, which is configured in the manner of a curly brace, are disposed. The free ends may be permanently fastened in the two openings in any desired manner. -
FIG. 7 shows actuating element 600 ofFIG. 6 tilted about its axis of rotation, with lockingmember 400 ofFIG. 4 disposed on its inner periphery and with acontrol curve 650, constructed on the inner periphery according to one exemplary embodiment, for actuating lockingmember 400 or rather lockingspring arm 417 thereof.Control curve 650 is preferably configured to make it possible for lockingmember 400 to be urged at least in portions towardmachine interface 150 of hand-heldmachine tool 100 ofFIG. 1 in the locked state of lockingunit 202 ofFIG. 2 . -
FIG. 8 shows actuating element 600 ofFIG. 6 rotated about its axis of rotation by about 160°, without lockingmember 400 ofFIGS. 4 and 5 , to illustratecontrol curve 650 ofFIG. 7 . According to one exemplary embodiment,control curve 650 has arelease portion 652, in whichlocking spring arm 417 of lockingmember 400 is able to spring radially outward in a release position, and an urgingportion 656, configured by way of illustration in the manner of a radially inwardly oriented projection, with which lockingspring arm 417 may be urged radially inward in a locking position. Betweenrelease portion 652 and urgingportion 656, asloped transfer portion 654 is preferably provided over which it is possible for lockingspring arm 417 to be transferred from its release position to its locking position and vice versa. -
FIG. 9 shows anassembly 900 having lockingbody 300 ofFIGS. 3 through 5 andactuating element 600 ofFIGS. 6 through 8 rotatably supported on itsouter periphery 245, and locking and blockingmembers FIGS. 4 through 6 disposed therebetween. Lockingbody 300 andactuating element 600 are shown by way of example in the unlocked state of lockingunit 202 ofFIG. 2 , in which blockingportion 520 of blockingmember 500 is engaged in an unlocking position in afirst recess 922 of fixingmember 320 and lockingspring arm 417 of lockingmember 400 springs radially outward in its release position towardrelease portion 652 ofcontrol curve 650. - According to one exemplary embodiment, locking
body 300 may be rotated by rotation of actuatingelement 600 in the direction of anarrow 999—clockwise in FIG. 9—in order to transfer lockingunit 202 ofFIG. 2 from the unlocked to the locked state. In this case, drivenmembers 330 of lockingbody 300 are preferably configured to make possible a rotational movement ofactuating element 600 relative to lockingbody 300 at least by apredetermined rotation angle 910 to enable blockingmember 500 to be transferred from the unlocked position to the blocking position, in which itsblocking portion 520 snaps into asecond recess 924 of fixingmember 320, and to enable lockingmember 400 to be transferred from its release position to its locking position. - After such a relative rotation by
rotation angle 910, viewed in the direction ofarrow 999driver elements 630 rest against drivenmembers 330. For example, after the relative rotation byrotation angle 910, adriver element 932 rests against a drivenmember 934. Upon rotation in the direction ofarrow 999 beyondrotation angle 910,driver elements 630 ofactuating element 600 and drivenmembers 330 of lockingbody 300, which viewed in the direction ofarrow 999 now rest against each other, are preferably configured to cooperate for rotary entrainment of lockingbody 300 in order to rotate lockingbody 300 from its first rotational position to its second rotational position. -
FIG. 10 shows atool system 1000 with hand-heldmachine tool 100 ofFIG. 1 andtool attachment 200 ofFIG. 2 , of which onlymachine interface 150 ofFIG. 1 andassembly 900 ofFIG. 9 are shown in order to simplify the drawing. For releasable fastening or locking oftool attachment 200,assembly 900 is disposed onmachine interface 150 such thatbayonets body 300 andmachine interface 150 may be locked to each other by rotation of actuatingelement 600 indirection 999 ofFIG. 9 , and hence of lockingbody 300 from its illustrated, first rotational position to its second rotational position illustrated inFIG. 11 . - When such a rotation is performed by a user of
tool system 1000,bayonets FIG. 2 , a resilient force is built up betweenbayonets portion 520 of blockingmember 500, which blockingportion 520 is to be transferred betweenrecesses spring arm 417 of lockingmember 400, which arm 417 is to be guided along slopedtransfer portion 654 ofcontrol curve 650. Accordingly, upon further rotation of actuatingelement 600 indirection 999, first the relative rotation described in the case ofFIG. 9 betweenactuating element 600 and lockingbody 300 byrotation angle 910 takes place, in which rotation a rotation of lockingbody 300 is prevented by the resilient force that has built up. After completion of the relative rotation byrotation angle 910, lockingportion 420 of lockingmember 400 engages set of lockingteeth 156 of lockingelement 155 and the resilient force which has built up may be overcome by a rotational force applied by the user in order to close the bayonet connection completely. - Since, therefore, locking
portion 420 of lockingmember 400 already engages set of lockingteeth 156 of lockingelement 155 upon tightening and at least upon complete closing of the bayonet connection, a chattering or clattering noise is produced which provides the user with auditory feedback. That noise preferably does not occur upon undoing the bayonet connection since in that case, owing to the resilient force which has built up, the connection forces are preferably greater than the above-described spring forces, with the result that the engagement of lockingportion 420 by set of lockingteeth 156 is released before bayonet connection is undone. -
FIG. 11 showstool system 1000 ofFIG. 10 in the locked state of lockingunit 202 ofFIG. 2 after rotation of actuatingelement 600 in the direction ofarrow 999 and hence of lockingbody 300 into its second rotational position.FIG. 11 makes clear the arrangement of blockingportion 520 of blockingmember 500, which blockingportion 520 is disposed in the blocking position inrecess 924 of fixingmember 320, and also illustrates lockingmember 400 urged by elastic deformation towardmachine interface 150 of hand-heldmachine tool 100 and whose lockingportion 420 engages set of lockingteeth 156 in order to prevent lockingbody 300 from automatically turning from its second rotational position into the first rotational position ofFIGS. 9 and 10 . In addition,FIG. 11 illustrates lockingspring arm 417 which is urged radially inward by urgingportion 656 ofcontrol curve 650. -
FIG. 12 shows atool system 1200 with hand-heldmachine tool 100 ofFIG. 1 , of which onlymachine interface 150 is shown to simplify the drawing, andtool attachment 200 ofFIG. 2 which has a lockingbody 300′, anactuating element 600′ and a locking and blockingmember 400′ that are configured in accordance with an alternative exemplary embodiment. Elements in the two exemplary embodiments that are functionally identical but which structurally may have been slightly modified have identical reference numerals. - In contrast to locking
member 400 ofFIG. 4 and blockingmember 500 ofFIG. 5 , locking and blockingmember 400′ is in one piece with a lockingportion 420′ and is disposed on the inner periphery of lockingbody 300′. Such a one-piece configuration of locking and blockingmember 400′ requires a few structural alterations to lockingbody 300′ andactuating element 600′ in contrast to lockingbody 300 ofFIGS. 3 through 5 andactuating element 600 ofFIGS. 5 through 8 . For example, illustrative locking and blockingmember 400′ merely has a lockingmember portion 417′ and a blockingmember portion 520′ which assume the functionality of lockingspring arm 417 and blockingportion 520, respectively, ofFIGS. 4 and 5 . Thoseportions 417′, 520′ engage throughrespective engagement apertures 310′ and 310″ provided at lockingbody 300′ and are spring-loaded toward an inner periphery of actuatingelement 600′ on which by way of illustration acontrol curve 650′ and a fixingmember 320′ are provided. -
FIG. 13 shows an example of atool attachment 700 according to an alternative exemplary embodiment which is preferably likewise configured for fastening tomachine interface 150 of hand-heldmachine tool 100 ofFIG. 1 .Tool attachment 700 is configured in the manner of an angle attachment and by way of example has afastening interface 702, hereinafter referred to as an “attachment interface” for clarity of the description, and adrive unit 704 which is also referred to hereinafter as an “angle drive portion”. It is pointed out, however, thattool attachment 700 is constructed as an angle attachment merely by way of example and not as a limitation of the present invention. Rather,tool attachment 700 may have any desired configuration, for example in the manner of an eccentric attachment, a drill chuck attachment, etc. For simplicity of the description,tool attachment 700 is also referred to hereinafter as “angle attachment 700”. -
Angle drive portion 704 has by way of example anattachment housing 710 in which adrive shaft 798 which is drivable in rotation is rotatably supported in two bearingelements shaft 798 serves to drive adrive shaft 705 which is disposed at a predetermined angle thereto, by way of illustration 90°, and which is likewise rotatably supported inattachment housing 710, for example in two bearingelements FIG. 1 . In this case, driveshaft 798 drives driveshaft 705, for example, via asuitable conversion 720. It is pointed out, however, that a suitable practical realization ofangle drive portion 704 is sufficiently known from the related art and therefore a detailed description ofangle drive portion 704 may be dispensed with here for conciseness. - Disposed in the region of a
free end 769, remote fromangle drive portion 704, ofdrive shaft 798, on which end apolygonal driving contour 765 is provided by way of example, there is anangle setting element 772 which is of a sleeve-shaped or tubular configuration at least in regions, through which driveshaft 798 extends. Thatangle setting element 772 is preferably rigidly connected toattachment housing 710, that is, so as to be axially and radially immovable, and/or is constructed in one piece withattachment housing 710. By way of illustration,angle setting element 772 has at the axial end thereof towardangle drive portion 704 anexternal ring collar 752 which is disposed in an axially and radially immovable manner between two, for example annular,projections attachment housing 710, for example by being press-fitted or clamped. At its otheraxial end 771, a front-face set ofangle setting teeth 774 is provided. - In addition,
drive shaft 798 is assigned anactuating member 797 which is provided with afree end 788 and the functionality of which corresponds to the functionality of actuatingmember 270 ofFIG. 2 , and therefore a detailed description thereof will be dispensed with here for conciseness description. Alternatively, driveshaft 798 and actuatingmember 797 may also be constructed in one piece. Actuatingmember 797 is by way of example disposed in the interior ofangle setting element 772 and is preferably radially spaced therefrom. - According to one exemplary embodiment,
drive shaft 798 is rotatable relative to actuatingmember 797. In this case, driveshaft 798 may, for example, be rotatably supported in a plain bearing, for example a sintered bearing, press-fitted in actuatingmember 797. -
Fastening interface 702 serves to fastentool attachment 700 to an associated hand-held machine tool, for example hand-heldmachine tool 100 ofFIG. 1 , and has by way of illustration an angularposition setting unit 770, which may likewise be used in the case oftool attachment 200 ofFIG. 2 and with whichangle setting element 772 is associated, and alocking unit 760. Lockingunit 760 is configured to locktool attachment 700 for operation to the hand-held machine tool in a predetermined angular position thereon in the locked state and to enabletool attachment 700 to be pulled off the hand-held machine tool in an unlocked state. Angularposition setting unit 770 is configured to enable the predetermined angular position oftool attachment 700 to be set for operation on the hand-held machine tool. According to one exemplary embodiment, angularposition setting unit 770 is operable in the locked state of lockingunit 760 to make it possible for the predetermined angular position to be altered. Such operation to alter the predetermined angular position is preferably effected by a combined longitudinal and rotational movement ofattachment housing 710. - According to one exemplary embodiment, locking
unit 760 has a lockingbody 762, especially a locking body of an at least partly tubular configuration or a locking body provided with atubular receiving portion 761. Intubular receiving portion 761 and hence in lockingunit 760, angle setting element is supported to be movable longitudinally and in rotation. At an axial end of lockingbody 762 remote fromangle drive portion 704, lockingbody 762 continues via anannular shoulder 781 from tubular receivingportion 761 on the one hand into awidened region 783 and on the other hand into a centeringmember 731 which has, for example, at least two arcuate centeringregions tool attachment 700, that is, indirection 198 ofFIG. 1 . It is pointed out, however, that centeringmember 731 has the at least two arcuate, sloped centeringregions member 731 may also have a single centering region configured in the manner of a conical frustum. - In
widened region 783, at least two locking elements 766 (and 768 inFIG. 14 ) are preferably provided which by way of example are configured in the manner of bayonets to form a bayonet connection. Furthermore, there is disposed on the outer periphery of that widenedregion 783 by way of example anactuating ring 764 which is operable to lock lockingbody 762 to the hand-held machine tool, it being possible for lockingbody 762 andactuating ring 764 to be constructed in one piece. On outer periphery of tubular receivingportion 761, by way of illustration areturn sleeve 750 is supported to be movable axially and radially. The latter is supported onannular shoulder 781 by anannular collar 714 provided at an axial end ofreturn sleeve 750 towardannular shoulder 781 of tubular receivingportion 761, and at its other axial end is engaged by anannular groove 717 provided inattachment housing 710. Alternatively, returnsleeve 750 may be integrally formed onattachment housing 710 and/or may be constructed in one piece therewith. - In addition, provided between
annular collar 714 and a securingring 719 disposed in an outerannular groove 718 of tubular receivingportion 761 is aspring element 780, for example a compression spring, which biases returnsleeve 750 with a predetermined spring force in the direction ofannular shoulder 781, that is, indirection 198 ofFIG. 1 .Annular groove 718 is constructed by way of example in the region of anaxial end 732 of tubular receivingportion 761 towardangle drive portion 704. -
FIG. 14 shows an example of atool system 800 which by way of illustration has hand-heldmachine tool 100 ofFIG. 1 andangle attachment 700 ofFIG. 13 to illustrate an example of the mounting ofangle attachment 700 on hand-heldmachine tool 100. Only a portion of the latter is shown, by a detail ofhousing 110 ofFIG. 1 at whosefront face 112machine interface 150 ofFIG. 1 is disposed and in which driveshaft 124 is rotatably supported in anillustrative rolling bearing 824,tool holder 140 ofFIG. 1 being disposed ondrive shaft 124. As described in the case ofFIG. 1 , according to one exemplaryembodiment machine interface 150 is disposed ongear unit housing 119. By way of illustration,fastening element 151 is in this case fastened to gearunit housing 119 by suitable fastening members, for example screws or rivets. - To mount
angle attachment 700 onmachine interface 150 of hand-heldmachine tool 100,angle attachment 700 is brought towardmachine interface 150 ofFIG. 1 indirection 198 ofFIG. 1 and is positioned thereon in a predetermined angular position such that widenedportion 783 of tubular receivingportion 761 is disposed in the region offastening element 151 ofmachine interface 150. In that operation, actuatingmember 797 ofangle attachment 700 is brought by itsfree end 788 into contact with lockingsleeve 149 oftool holder 140 of hand-heldmachine tool 100, so thatfree end 769 ofdrive shaft 798 engages partly in empty internalpolygonal receptacle 148 oftool holder 140 and is prevented from engaging completely by lockingballs 729 associated by way of example withtool holder 140. Those lockingballs 729, or other suitable locking elements, are urged radially inward in a manner known to one skilled in the art, for example, by lockingsleeve 149 oftool holder 140 in order in that manner to prevent unimpeded insertion ofdrive shaft 768 into internalpolygonal receptacle 148, lockingsleeve 149 being spring-loaded by aspring element 897 inaxial direction 199 ofFIG. 1 pointing away from hand-heldmachine tool 100. - In a further step,
angle attachment 700 is pushed ontomachine interface 150 in the direction of hand-heldmachine tool 100, that is, indirection 198, for example until widenedregion 783 of tubular receivingportion 761 rests againstfastening element 151 ofmachine interface 150 so that, by rotation of actuatingring 764 of lockingunit 760 oftool attachment 700,bayonets bayonets fastening element 151 and thus may be locked thereto, so that lockingunit 760 is transferred from its unlocked state to the locked state. In that locked state,attachment housing 710 ofangle attachment 700 is urged indirection 198 of hand-heldmachine tool 100 by a predetermined spring force exerted byspring element 780 of lockingunit 760 oftool attachment 700. - In addition, as a result of
tool attachment 700 being pushed ontomachine interface 150, lockingsleeve 149 oftool holder 140 is pushed by actuatingmember 797 ofangle attachment 700 indirection 198 against a spring force exerted byspring element 897, so thatfree end 769 ofdrive shaft 798 may be pushed into internalpolygonal receptacle 148. That makes one-handed mounting oftool attachment 700 on hand-heldmachine tool 100 possible, driveshaft 798 having clearance tangentially and axially and preferably being received in internalpolygonal receptacle 148 of receivingbody 147 oftool holder 140 exclusively for transmitting torque. - In addition, sloped centering
regions portion 761 oftool attachment 700 are brought into contact with centeringaid 153 offastening element 151, which centeringaid 153 is configured in the manner of anannular cone surface 159. A secure and reliable axial centering oftool attachment 700 attool holder 140 or rather relative to drivespindle 124 of hand-heldmachine tool 100 may thus be made possible. In addition, set ofangle setting teeth 774 ofangle setting element 772 oftool attachment 700 is brought into engagement withangle setting members 157 offastening element 151. In that manner, the predetermined angular position for operation oftool attachment 700 on hand-heldmachine tool 100 is established. - Actuating
ring 764 ofangle attachment 700 and henceentire angle attachment 700 is then released, whereupon actuatingmember 797 is urged, owing to the spring force ofspring element 897, by lockingsleeve 149 oftool holder 140 indirection 199, so thatentire angle attachment 700 is forced to move axially indirection 199. In that manner, the bayonet connection betweenbayonets tool attachment 700 andbayonets fastening element 151 is additionally secured.
Claims (23)
1. A tool attachment for fastening to a fastening interface of a hand-held machine tool, comprising:
a locking unit which in an unlocked state makes it possible for the tool attachment to be placed on the fastening interface of the hand-held machine tool and in a locked state makes it possible for the tool attachment to be locked to the fastening interface of the hand-held machine tool for operation, the locking unit having a rotatable locking body, and a first rotational position of the locking body being associated with the unlocked state and a second rotational position of the locking body being associated with the locked state,
wherein the locking unit has a locking member which is configured to prevent rotation of the locking body from the second rotational position into the first rotational position in the locked state.
2. The tool attachment according to claim 1 , wherein the locking member is configured to cooperate in the locked state with a locking element associated with the fastening interface of the hand-held machine tool.
3. The tool attachment according to claim 2 , wherein the locking element has at least one set of locking teeth.
4. The tool attachment according to claim 3 , wherein the locking member is of a resilient configuration at least in regions and has at least one locking portion which in the locked state is urged toward the fastening interface of the hand-held machine tool by an elastic deformation of the locking member.
5. The tool attachment according to claim 4 , wherein the locking portion is configured to engage the set of locking teeth in order to prevent the rotation of the locking body from the second rotational position into the first rotational position.
6. The tool attachment according to claim 1 , wherein the locking unit has an actuating element which is configured to make possible a rotation of the locking body from the first into the second rotational position.
7. The tool attachment according to claim 6 , wherein the locking body is at least partly tubular and the actuating element is rotatably supported on an outer periphery of the locking body.
8. The tool attachment according to claim 6 , wherein at least one driver element is provided on the actuating element and at least one driven member is provided on the locking body, the driver element and the driven member being configured to cooperate for rotary entrainment of the locking body upon actuation of the actuating element to rotate the locking body from the first into the second rotational position.
9. The tool attachment according to claim 8 , wherein the driven member is configured to make possible a rotational movement of the actuating element relative to the locking body at least by a predetermined rotation angle.
10. The tool attachment according to claim 6 , wherein the actuating element is configured to urge the locking member in the locked state at least in portions toward the fastening interface of the hand-held machine tool.
11. The tool attachment according to claim 10 , wherein the actuating element has a control curve which is configured to enable the locking member to be urged at least in portions toward the fastening interface of the hand-held machine tool in the locked state.
12. The tool attachment according to claim 6 , wherein there is associated with the actuating element a blocking member which is configured to block the actuating element in a blocking position at the locking body in the locked state, in which blocking position the actuating element urges the locking member at least in portions toward the fastening interface of the hand-held machine tool.
13. The tool attachment according to claim 12 , wherein the blocking member is of a resilient configuration at least in regions and has a blocking portion which in the blocking position may be releasably fixed in a fixing member provided on the locking body.
14. The tool attachment according to claim 13 , wherein the fixing member is configured in the manner of a recess and the blocking portion is configured to snap into the fixing member in the blocking position in order to prevent automatic rotation of the actuating element relative to the locking body in the locked state.
15. The tool attachment according to claim 12 , wherein the locking member and the blocking member are constructed in one piece.
16. The tool attachment according to claim 1 , wherein the locking body has locking elements which are configured in the manner of bayonets to form a bayonet connection with the fastening interface of the hand-held machine tool.
17. A hand-held machine tool, comprising:
a fastening interface for fastening of a tool attachment which has a locking body which is lockable to the fastening interface,
wherein there is associated with the fastening interface a locking element which is configured to lock a rotationally secured locking of the locking body of the tool attachment to the fastening interface.
18. A tool system, comprising:
a hand-held machine tool which has a fastening interface, and
a tool attachment for fastening to the fastening interface of the hand-held machine tool, the tool attachment having a locking unit which in an unlocked state makes it possible for the tool attachment to be placed on the fastening interface of the hand-held machine tool and in a locked state makes it possible for the tool attachment to be locked to the fastening interface of the hand-held machine tool for operation, the locking unit having a rotatable locking body which in the unlocked state is disposed in a first rotational position and in the locked state is disposed in a second rotational position on the fastening interface of the hand-held machine tool,
wherein the locking unit has a locking member which is configured to prevent rotation of the locking body from the second rotational position into the first rotational position in the locked state.
19. A hand-held machine tool, comprising:
a fastening interface for rotationally secured fastening of a tool attachment,
wherein the fastening interface is fastened to a gear unit housing of the hand-held machine tool.
20. The hand-held machine tool according to claim 19 , further comprising:
a tool holder for receiving an inserted tool, which tool holder has a spring-loaded locking sleeve for locking the inserted tool,
wherein the locking sleeve may be pushed at least partly into the fastening interface.
21. The hand-held machine tool according to claim 19 , wherein the fastening interface is configured to enable a fastening of the tool attachment to the gear unit housing, which fastening is oriented in a predetermined angular position.
22. The hand-held machine tool according to claim 19 , wherein an at least partly conical centering aid is provided at the fastening interface for axial centering of the tool attachment.
23. The hand-held machine tool according to claim 19 , wherein there is associated with the fastening interface a locking element which is configured to lock a rotationally secured locking, to the fastening interface, of a locking body of the tool attachment, which locking body is lockable to the fastening interface.
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DE201310213804 DE102013213804A1 (en) | 2012-11-22 | 2013-07-15 | Tool attachment for a hand tool |
DE102013213804 | 2013-07-15 |
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US10131042B2 (en) | 2013-10-21 | 2018-11-20 | Milwaukee Electric Tool Corporation | Adapter for power tool devices |
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US9751176B2 (en) * | 2014-05-30 | 2017-09-05 | Black & Decker Inc. | Power tool accessory attachment system |
DE102016202831A1 (en) | 2015-02-25 | 2016-08-25 | Robert Bosch Gmbh | Hand tool |
DE102015206634A1 (en) * | 2015-04-14 | 2016-10-20 | Robert Bosch Gmbh | Tool attachment for a hand tool |
DE102015206622A1 (en) | 2015-04-14 | 2016-10-20 | Robert Bosch Gmbh | Tool attachment for a hand tool |
DE102015209017A1 (en) | 2015-05-18 | 2016-11-24 | Robert Bosch Gmbh | Intermediate attachment for a hand tool |
DE102016224186A1 (en) * | 2016-12-06 | 2018-06-07 | Robert Bosch Gmbh | Adapter attachment for clamping a circular shaft insert tool |
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US10131042B2 (en) | 2013-10-21 | 2018-11-20 | Milwaukee Electric Tool Corporation | Adapter for power tool devices |
US10131043B2 (en) | 2013-10-21 | 2018-11-20 | Milwaukee Electric Tool Corporation | Adapter for power tool devices |
US10213908B2 (en) | 2013-10-21 | 2019-02-26 | Milwaukee Electric Tool Corporation | Adapter for power tool devices |
US10569398B2 (en) | 2013-10-21 | 2020-02-25 | Milwaukee Electric Tool Corporation | Adaptor for power tool devices |
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US11541521B2 (en) | 2013-10-21 | 2023-01-03 | Milwaukee Electric Tool Corporation | Power tool communication system |
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Also Published As
Publication number | Publication date |
---|---|
US9694428B2 (en) | 2017-07-04 |
CN103831799B (en) | 2017-10-03 |
EP2745992B1 (en) | 2020-08-05 |
EP2745992A3 (en) | 2018-05-30 |
CN103831799A (en) | 2014-06-04 |
EP2745992A2 (en) | 2014-06-25 |
US20150115554A1 (en) | 2015-04-30 |
DE102013213804A1 (en) | 2014-05-22 |
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