Tool attachment and tool system with a hand tool and a tool attachment

Abstract

In a tool attachment (1200) with a tool holder (1240) for receiving an insert tool and an attachment interface (1250) for arrangement on a machine interface of a hand-held power tool, as well as with a locking unit (1220) which has at least one locking element (352) and is designed to lock the tool attachment to the machine interface of the hand-held power tool in a locked state and to enable removal of the tool attachment from the machine interface of the hand-held power tool in an unlocked state, wherein the locking unit (1220) has an actuating sleeve (1222) for actuating the locking unit (1220) and a locking sleeve (340) for locking or releasing the at least one locking element (352) on the machine interface of the hand-held power tool,at least one guide track (319) and at least one guide element (325) which can be guided in the guide track (319) are assigned to the actuating sleeve (1222), wherein a rotation of the actuating sleeve (1222) in a predetermined direction of rotation (202) about an associated axis of rotation (1202) moves the at least one guide element (325) along the guide track (319).

Description

State of the art

[0001] The present invention relates to a tool attachment with a tool holder for receiving an insert tool and an attachment interface for arrangement on a machine interface of a hand-held power tool, as well as with a locking unit which has at least one locking element and is designed to lock the tool attachment to the machine interface of the hand-held power tool in a locked state and to enable removal of the tool attachment from the machine interface of the hand-held power tool in an unlocked state, wherein the locking unit has an actuating sleeve for actuating the locking unit and a locking sleeve for locking or releasing the at least one locking element on the machine interface of the hand-held power tool.

[0002] A tool attachment with a tool holder for receiving an insert tool and an attachment interface for arrangement on a machine interface of a handheld power tool is known from the prior art. The tool attachment has a locking unit with locking elements. The locking unit is designed to lock the tool attachment to a machine interface of a handheld power tool in a locked state and to enable removal of the tool attachment from the machine interface of the handheld power tool in an unlocked state. Furthermore, the locking unit has an actuating sleeve for actuating the locking unit and a locking sleeve for locking or releasing the at least one locking element. Disclosure of the invention

[0003] The invention relates to a tool attachment with a tool holder for receiving an insert tool and an attachment interface for arrangement on a machine interface of a hand-held power tool, as well as with a locking unit which has at least one locking element and is designed to lock the tool attachment to the machine interface of the hand-held power tool in a locked state and to enable removal of the tool attachment from the machine interface of the hand-held power tool in an unlocked state, wherein the locking unit has an actuating sleeve for actuating the locking unit and a locking sleeve for locking or releasing the at least one locking element on the machine interface of the hand-held power tool.At least one guide track and at least one guide element that can be guided in the guide track are assigned to the actuating sleeve, wherein a rotation of the actuating sleeve in a predetermined direction of rotation about an associated axis of rotation moves the at least one guide element along the guide track.

[0004] The invention thus enables the provision of a tool attachment in which a simple and user-friendly operation of the actuating sleeve can be enabled by the at least one guide track and the guide element which can be guided in the guide track.

[0005] Preferably, the locking sleeve moves axially along the associated axis of rotation to enable adjustment of the locking state or the unlocking state.

[0006] This makes it easy to set the locking or unlocking state.

[0007] Preferably, the locking sleeve has on its inner circumference an unlocking portion having a first diameter and a locking portion having a second diameter, wherein the first diameter is larger than the second diameter.

[0008] This makes locking and unlocking easy and uncomplicated.

[0009] According to one embodiment, the locking sleeve has an integrated metal ring on its locking portion.

[0010] This allows a stable and robust locking sleeve to be provided.

[0011] Preferably, the actuating sleeve has at least two snap hooks on its inner circumference.

[0012] This allows the actuating sleeve to be easily and securely locked into the locking or unlocking position.

[0013] Preferably, the attachment interface has webs formed in the axial direction, each having a receptacle, wherein at least one first snap hook latches in a first associated receptacle in the unlocked state, and wherein at least one second snap hook latches in a second associated receptacle in the locked state.

[0014] This enables a stable and reliable arrangement in the locking or unlocking position.

[0015] According to one embodiment, an attachment housing is provided, wherein the at least one guide track is formed on an outer circumference of the attachment housing and at least one guide element is arranged on an inner circumference of the actuating sleeve.

[0016] This makes it possible to arrange at least one guideway in a simple manner.

[0017] Preferably, the actuating sleeve has webs distributed in the circumferential direction on its inner circumference, which form a driver receptacle for the locking sleeve.

[0018] This means that a movement of the actuating sleeve can be easily and simply transferred to the locking sleeve.

[0019] Preferably, the locking sleeve has at least one driving web on its outer circumference, wherein the driving web is driven along in the driving receptacle during a movement of the actuating sleeve.

[0020] This makes it easy and reliable to carry the locking sleeve.

[0021] Alternatively, the at least one guide track is formed on an inner circumference of the actuating sleeve and at least one guide element is arranged on an outer circumference of the locking sleeve.

[0022] This makes it easy and uncomplicated to arrange an alternative arrangement of at least one guideway.

[0023] Preferably, the actuating sleeve has a ramp-shaped recess on its inner circumference and a holding element arranged facing the ramp-shaped recess is arranged on the inner circumference of the actuating sleeve.

[0024] This makes it possible to easily design the actuating sleeve and the holding element in a suitable manner.

[0025] The holding element preferably has a ramp-shaped recess in sections on its front side, wherein the ramp-shaped recess and the ramp-shaped recess form the at least one guide track.

[0026] This means that at least one guideway can be provided safely and reliably.

[0027] Preferably, the actuating sleeve has receptacles on its inner circumference and the holding element has locking hooks for locking in the receptacles.

[0028] This provides a secure and reliable connection between the actuating sleeve and the retaining element.

[0029] Preferably, an attachment housing is provided, wherein the locking sleeve has at least one receptacle for arrangement on a housing web of the attachment housing to form an anti-twist device.

[0030] This makes it easy to provide anti-twist protection.

[0031] Furthermore, the present invention provides a tool system with a hand-held power tool having a machine interface for attaching a tool attachment, and with a tool attachment according to the invention.

[0032] The invention thus enables the provision of a tool system with a hand-held power tool and a tool attachment, in which a simple and user-friendly operation of the actuating sleeve can be enabled by the at least one guide track and the guide element which can be guided in the guide track. Short description of the drawings

[0033] The invention is explained in more detail in the following description using exemplary embodiments illustrated in the drawings. They show: Fig. 1 a perspective view of a tool system with a hand-held power tool and a tool attachment according to the invention, Fig. 2 a perspective view of the tool attachment of Fig. 1, Fig. 3 an exploded view of the tool attachment of Fig. 1 and Fig. 2, Fig. 4 a perspective view of the tool attachment of Fig. 1 to Fig. 3, without an actuating sleeve assigned to the tool attachment, Fig. 5 a perspective view of the tool attachment of Fig. 1 to Fig. 4 associated actuating sleeve, Fig. 6 a longitudinal section through the tool attachment of Fig. 1 to Fig. 4 to illustrate an associated locking unit, which in Fig. 6 is in an unlocked state, Fig. 7 a longitudinal section through the tool attachment of Fig. 1 to Fig. 4 in a locking state of the locking unit, Fig. 8 a perspective view of the actuating sleeve of the tool attachment of Fig. 1 to Fig. 7, Fig. 9 a perspective view of the actuating sleeve of the tool attachment of Fig. 1 to Fig. 7 with an associated locking sleeve, Fig. 10 a sectioned exploded view of the actuating sleeve of Fig. 8 and Fig. 9 with an alternative locking sleeve, Fig. 11 a perspective sectional view through the actuating sleeve with the locking sleeve of Fig. 10, Fig. 12 a plan view of the locking unit of the tool attachment of Fig. 1 to Fig. 3, Fig. 6 and Fig. 7 in the locked state, Fig. 13 an enlarged section of the actuating sleeve of Fig. 3 and Fig. 5 to Fig. 12, Fig. 14 a sectional view through the actuating sleeve of Fig. 3 and Fig. 5 to Fig. 13 in unlocked state, Fig. 15 a sectional view through the actuating sleeve of Fig. 3 and Fig. 5 to Fig. 14 in the locked state, Fig. 16 a longitudinal section through the tool attachment of Fig. 1 to Fig. 15 in unlocked state, Fig. 17 a perspective view of the tool attachment of Fig. 1 to Fig. 16 with an alternative locking unit, Fig. 18 is a perspective exploded view of the tool attachment of Fig. 17, Fig. 19 a perspective view of a tool attachment of Fig. 17 and Fig. 18 associated actuating sleeve with a holding element, Fig. 20 a side view of the locking unit of the tool attachment of Fig. 17 to Fig. 19, in which the actuating sleeve is shown in section, Fig. 21 a plan view of the locking unit of the tool attachment of Fig. 17 to Fig. 20, Fig. 22 a longitudinal section through the locking unit of Fig. 17 to Fig. 21 with an alternative locking sleeve, Fig. 23 a plan view of the locking unit of the tool attachment of Fig. 17 to Fig. 22 in unlocked state, Fig. 24 a perspective exploded view and sectional view through the actuating sleeve of Fig. 17 to Fig. 23 with an alternative locking sleeve, Fig. 25 a perspective sectional view through the actuating sleeve with the locking sleeve of Fig. 24, Fig. 26 an enlarged section of the actuating sleeve of Fig. 17 to Fig. 25, Fig. 27 a sectional view through the actuating sleeve of Fig. 17 to Fig. 26 in unlocked state, Fig. 28 a sectional view through the actuating sleeve of Fig. 17 to Fig. 27 in the locked state, and Fig. 29 a longitudinal section through the tool attachment of Fig. 17 to Fig. 28 in unlocked state. Description of the embodiments

[0034] In the figures, elements with the same or comparable function are provided with identical reference symbols and are described in detail only once.

[0035] Fig. 1 shows an exemplary handheld power tool 100, which has a housing 110 with a handle 126 and a tool holder 140. The handheld power tool 100 is illustratively mechanically and electrically connected to a battery pack 130 for off-grid power supply.

[0036] The handheld power tool 100 is embodied, for example, as a cordless impact drill. However, it should be noted that the present invention is not limited to cordless impact drills, but rather can be applied to various handheld power tools that have a tool holder corresponding to the tool holder 140, regardless of whether the handheld power tool 100 is electrically operated, i.e., independently of the mains using the battery pack 130 or mains-dependent, and / or non-electrically.

[0037] An electric drive motor supplied with power by the battery pack 130, a gearbox preferably provided with a separate gearbox 119, and an optional impact mechanism, e.g., a detent impact mechanism, are preferably arranged in the housing 110. The drive motor can be actuated, e.g., via a handset 117, i.e., switched on and off, and can preferably be electronically controlled or regulated in such a way that both reversing operation and specifications regarding a desired rotational speed can be implemented. Furthermore, a rotation direction switch 116 is preferably arranged in the area of ​​the handset 117, via which rotational direction of the drive motor or of an output shaft 124 assigned to the drive motor can be set. Furthermore, an optional work area illumination 118 is arranged on the housing 110, in the area of ​​the tool holder 140.

[0038] The tool holder 140 is formed on the output shaft 124, illustratively comprising a holder body 147 with an internal polygonal holder 148 and an outer circumference 149. The internal polygonal holder 148 is intended for receiving insert tools with external polygonal couplings.

[0039] The tool holder 140 is designed, for example, in the manner of a bit holder, i.e. for receiving an insert tool designed in the manner of a screwdriver bit, which is pushed into the polygonal socket 148 in the direction of the hand-held power tool 100, as indicated by an arrow 198. A screwdriver bit of this type, which is illustratively of the so-called HEX type, is sufficiently known from the prior art, so that a detailed description is omitted here for the sake of brevity. It should be noted, however, that the present invention is not limited to the use of HEX screwdriver bits, but that other insert tools can also be used depending on the respective selected configuration of the tool holder 140, e.g. HEX drills or so-called SDS quick insert tools.Furthermore, it is pointed out that the structure and functioning of a suitable bit holder are sufficiently known to the person skilled in the art, so that a detailed description of the exemplary bit holder 140 can be omitted here for the sake of brevity of the description.

[0040] According to one embodiment, the handheld power tool 100 is assigned a fastening interface 150, which is illustratively fixed axially and radially in the area of ​​the bit holder 140 on the gear housing 119 or directly on the housing 110. However, it should be noted that the fastening interface 150 is merely exemplary and is designed as a separate component and can alternatively be formed integrally with the gear housing 119 or the housing 110. Since the fastening interface 150 is assigned to the handheld power tool 100, it is also referred to below as the "machine interface 150."

[0041] The machine interface 150 serves to attach an interchangeable tool attachment, wherein a tool attachment 1200 designed in the manner of an angle attachment with an angle gear is shown merely by way of example. Illustratively, the machine interface 150 has a fastening device 158, preferably at least partially annular, which is fastened to an end face 112 of the housing 110 on the gear housing 119 or the housing 110 in a rotationally secured manner. The fastening device 158 is preferably at least partially annular and has an outer circumference 159 and an inner circumference 157. The fastening device 158, for example, encloses the bit holder 140 at least partially with a predetermined radial spacing.

[0042] On the outer circumference 159 of the fastening device 158, a plurality of groove-like receptacles 152, 154 for receiving at least one and preferably a plurality of angle adjustment elements are illustratively formed, which is why the fastening device 158 is also referred to below as "angle adjustment element 158" in the context of the present invention. The groove-like receptacles 152, 154 are aligned, for example, in the longitudinal direction of the machine interface 150, i.e., in the direction of an arrow 199. The groove-like receptacles 152, 154 are preferably formed by projections aligned axially in the direction of the arrow 199, of which only one is provided with the reference numeral 153 for the sake of clarity and comprehensibility of the drawing.

[0043] The fastening device or angle adjustment element 158 ​​is preferably arranged on the end face 112 of the housing 110 via at least one, and illustratively three, fastening elements 162, 164, 166. The fastening elements 162, 164, 166 are preferably designed in the manner of screws.

[0044] Furthermore, the angle adjustment element 158 ​​has an angular position adjustment device 160 for setting a predetermined angular position of the tool attachment 1200 during its assembly on the handheld power tool 100. In this case, an attachment interface 1250 of the tool attachment 1200 is preferably secured against rotation to the machine interface 150, as described in detail below.

[0045] The tool attachment 1200 preferably has an attachment housing 1210 with a first and second axial end 1201, 1202. By way of example, the first axial end 1201 is arranged at a predetermined angle of illustratively 90 degrees to the second axial end 1202. The attachment interface 1250 is preferably arranged at the first axial end 1201, and a tool holder 1240 for receiving an insert tool is preferably arranged at the second axial end 1202. The attachment interface 1250 is preferably designed for rotationally secured fastening to the machine interface 150 of the handheld power tool 100 and has a fastening element 1215. Furthermore, the attachment interface 1250 is assigned an angular position adjustment unit 1360 for setting a predetermined angular position of the tool attachment 1200 on the machine interface 150 of the handheld power tool 100.

[0046] The angular position adjustment unit 1360 preferably comprises the fastening element 1215, which is preferably designed in the manner of a disc-shaped angle adjustment member and is also referred to below as "angle adjustment member 1215." Analogous to the angle adjustment element 158, the angle adjustment member 1215 has a plurality of groove-like receptacles 1252, 1254, which are preferably designed in the manner of recesses, wherein the fastening element 1215 is preferably designed in the manner of a crown disk.

[0047] Furthermore, the attachment interface 1250 has a locking unit 1220 which is designed to be in a locking state (700 in Fig. 7) to lock the tool attachment 1200 on the machine interface 150 of the hand-held power tool 100 and in the unlocked state (600 in Fig. 6) to enable the tool attachment 1200 to be removed from the machine interface 150. Preferably, the locking unit 1220 is assigned an actuating member 1222 designed as an actuating sleeve, which is also referred to below as "actuating sleeve 1222." The actuating sleeve 1222 is designed to transfer the locking unit 1220 from the locked state to the unlocked state upon actuation.

[0048] Preferably, the handheld power tool 100 forms a tool system 180 with the tool attachment 1200. This tool system 180 illustratively comprises only the tool attachment 1200, but may also comprise other interchangeable tool attachments, e.g., an eccentric attachment, etc. Furthermore, the tool attachment 1200 may also be configured in any other way, e.g., as an eccentric attachment.

[0049] Fig. 2 shows the tool attachment 1200 of Fig. 1, which has at its first axial end 1201 the angle adjustment member 1215 with a plurality of groove-like receptacles 1252, 1254, which form a plurality 250 of angle adjustment elements 251, 252 or are formed by them. For example, a groove-like receptacle 1252 is formed between two adjacent angle adjustment elements 251, 252. The angle adjustment elements 251, 252 are preferably arranged distributed in the region of the outer circumference, and preferably in a direction of rotation 202, or in the circumferential direction of the angle adjustment member 1215. According to one embodiment, the angle adjustment elements 251, 252 are arranged evenly spaced from one another in the circumferential direction of the angle adjustment member 1215. Furthermore, the angle adjustment elements 251, 252 are aligned in the axial direction 201 of the tool attachment 1200, ie in the direction of a rotation axis 299 of the first axial end 1201 of the tool attachment 1200, or facing away from it.

[0050] Furthermore, the actuating sleeve 1222 has, for example, a pictogram 210 on its outer circumference to clarify an operating direction.

[0051] Fig. 3 shows the tool attachment 1200 of Fig. 1 and Fig. 2 without the tool holder 1240 of Fig. 1 and Fig. 2. This illustrates Fig. 3, the front housing 1210, which preferably has a first and second housing half-shell 311, 312. In addition, Fig. 3 shows the angle adjustment member 1215 with the angle adjustment elements 251, 252 arranged facing the first axial end 1201. On its side 301 facing away from the first axial end 1201, the angle adjustment member 1215 has at least two axial webs 322, 323 arranged distributed in the circumferential direction. The angle adjustment member 1215 preferably has recesses 315 in the region of the webs 322, 323 for receiving screws 316. The attachment housing 1210 preferably has threaded bores 317 on its end face 318 facing the angle adjustment member 1215. The angle adjustment member 1215 is preferably fastened to the end face 318 of the angle adjustment member 1215, in particular in the threaded bores 317, via the screws 316.

[0052] Furthermore, Fig. 3 the locking unit 1220, which has at least one locking element 352 and is designed to be in a locking state (700 in Fig. 7) the tool attachment 1200 on the machine interface 150 of the hand tool 100 of Fig. 1 and in an unlocked state (600 in Fig. 6) removing the tool attachment 1200 from the machine interface 150 of the hand tool 100 from Fig. 1. Preferably, the locking unit 1220 has the actuating sleeve 1222 for actuating the locking unit 1220, as well as a locking sleeve 340 for locking or releasing the at least one locking element 352 on or from the machine interface 150 of the hand-held power tool 100 of Fig. 1. The locking sleeve 340 preferably comprises plastic and / or metal.

[0053] According to the invention, the actuating sleeve 1222 is assigned at least one guide track 319 and at least one guide element 325 that can be guided in the guide track 319. Rotation of the actuating sleeve 1222 in a predetermined direction of rotation 202 about the associated axis of rotation 299, or in the circumferential direction of the actuating sleeve 1222, preferably moves the at least one guide element 325 along the guide track 319. This allows one-handed operation of the actuating sleeve 1222.

[0054] Preferably, the locking sleeve 340 moves axially along the associated rotation axis 299 to allow adjustment of the locking state (700 in Fig. 7) or the unlocking state (600 in Fig. 6). According to one embodiment, the at least one guide track 319 is formed on an outer circumference 399 of the front housing 1210. For this purpose, the at least one guide element 325 is arranged on an inner circumference 321 of the actuating sleeve 1222. The at least one guide element 325 is preferably designed as a radially inwardly directed web. Preferably, each housing half-shell 311, 312 of the front housing 1210 is assigned a guide track 319, wherein the actuating sleeve 1222 preferably has at least two guide elements 325.

[0055] The locking sleeve 340 preferably has at least one driving web 341 on its outer circumference 342. The driving web 341 is preferably carried along by the actuating sleeve 1222 during a movement of the actuating sleeve 1222. The actuating sleeve 1222 preferably has on its inner circumference 321 a locking contour 330 for secure locking in the locked state (700 in Fig. 7).

[0056] Furthermore, a receiving sleeve 350 is preferably provided, which has an internal receptacle 354 in which the tool holder 140 of the hand-held power tool 100 of Fig. 1. Furthermore, the receiving sleeve 350 has at least one recess 351 for partially receiving the at least one locking element 352. In the assembled state of the tool attachment 1200, the locking sleeve 340 is arranged on an outer circumference 355 of the receiving sleeve 350.

[0057] Fig. 4 shows the tool attachment 1200 of Fig. 1 to Fig. 3 without the actuating sleeve 1222. Fig. 4 the guideways 319 formed on the outer circumference 399 of the front housing 1210.

[0058] Fig. 5 shows the actuating sleeve 1222 of the tool attachment 1200 of Fig. 1 to Fig. 3. This illustrates Fig. 5 which on the inner circumference 321 of the actuating sleeve 1222 the guideways 319 of Fig. 3 and Fig. 4 assigned guide elements 325.

[0059] Fig. 6 shows the locking unit 1220 of the tool attachment 1200 of Fig. 1 to Fig. 3 in the unlocking state 600, in which a removal of the tool attachment 1200 from the machine interface 150 of the hand-held power tool 100 of Fig. 1 is possible. Preferably, the locking sleeve 340 has an unlocking section 632 with a first diameter 636 and a locking section 634 with a second diameter 638 on its inner circumference. The first diameter 636 is arranged facing the angle adjustment member 1215. Preferably, the first diameter 636 is larger than the second diameter 638.

[0060] In the unlocking state 600 shown, the illustrative two locking elements 352 are arranged in the unlocking section 632, whereby the locking elements 352 are arranged in the radial direction 601 outside the inner receptacle 354 of the receiving sleeve 350 and thus a removal of the tool attachment 1200 from, for example, the machine interface 150 of the hand-held power tool 100 from Fig. 1 is possible. In the unlocked state 600, the angle adjustment member 1215 is also arranged at a distance from the actuating sleeve 1222 in the axial direction 201.

[0061] In addition, Fig. 6 shows, for example, webs 610, 620, which are assigned to the locking contour 330 arranged on the inner circumference 321 of the actuating sleeve 1222. The webs 610, 620 form a driver receptacle (810 in Fig. 8) for the locking sleeve 340. Here, the web 610 is arranged on a side of the driving web 341 of the locking sleeve 340 facing away from the angle adjustment member 1215, and the web 620 is arranged on a side of the driving web 341 facing the angle adjustment member 1215. Furthermore, Fig. 6 the guide element 325 of the actuating sleeve 1222 arranged in the guide track 319.

[0062] Fig. 7 shows the locking unit 1220 of the tool attachment 1200 of Fig. 1 to Fig. 3 and Fig. 6 in the locking state 700, into which the locking unit 1220 was transferred by rotating the actuating sleeve 1222. In the locking state 700, the tool attachment 1200 is, for example, at the machine interface 150 of the hand-held power tool 100 of Fig. 1 locked.

[0063] By rotating the actuating sleeve 1222 and moving the guide element 325 in the guide track 319, the locking sleeve 340 is preferably displaced in the axial direction 201, whereby the locking elements 352 in Fig. 7 are arranged in the locking section 634. As a result, the locking elements 352 are in the radial direction 601 into the inner receptacle 354 of the receiving sleeve 350 of Fig. 3. Thus, the tool attachment 1200 is connected to the machine interface 150 of the hand-held power tool 100 by Fig. 1 locked. In the locking state 700, the angle adjustment element 1215 is compared to Fig. 6 is arranged in the axial direction 201 closer to the actuating sleeve 1222.

[0064] Fig. 8 shows the actuating sleeve 1222 of Fig. 1 to Fig. 3 and Fig. 5 to Fig. 7 and illustrates the webs 610, 620. Preferably, the webs 610, 620 form a driver receptacle 810. The driver web 341 of the locking sleeve 340 of Fig. 3 and Fig. 6 is preferably carried along during a movement of the actuating sleeve 1222 in the driver receptacle 810. The webs 610, 620 are arranged distributed on the inner circumference 321 of the actuating sleeve 1222 in a circumferential direction 899.

[0065] Fig. 9 shows the actuating sleeve 1222 of Fig. 8 with the locking sleeve 340. Here, the driving web 341 of the locking sleeve 340 is in the driving receptacle 810 of Fig. 8 of the actuating sleeve 1222. The driving web 341 is preferably designed as a radial extension.

[0066] Fig. 10 shows the actuating sleeve 1222 with the locking sleeve 340, which, according to a further embodiment, has two driving webs 341, 1041 spaced apart from one another in the axial direction 201. The driving webs 341, 1041 preferably form a receptacle 1042. Illustratively, the web 610 is hook-shaped, wherein, in the assembled state, the web 610 is arranged in sections on an outer circumference of the driving web 1041 and engages in sections in the receptacle 1042.

[0067] In addition, the actuating sleeve 1222 has at least two snap hooks 1011, 1012 on its inner circumference 321 for locking with the attachment interface 1250 or the webs 322, 323 of Fig. 3 and Fig. 4 in unlocking state 600 and locking state 700.

[0068] Fig. 11 shows the actuating sleeve 1222 of Fig. 10 with the locking sleeve 340 of Fig. 10. Here, the web 610 is arranged in sections on an outer circumference of the driving web 1041 and engages in sections with the receptacle 1042 of the locking sleeve 340. The web 620 is axially located on a side of the driving web 341 facing away from the receptacle 1042.

[0069] Fig. 12 shows the actuating sleeve 1222 of Fig. 1 to Fig. 3 and Fig. 5 to Fig. 11 and the webs 322, 323 of the attachment interface 1250 and the angle adjustment member 1215 in the unlocked state 600. Preferably, the webs 322, 323 each have a receptacle 1111, 1112. The receptacles 1111, 1112 are formed on an outer side of the webs 322, 323. Furthermore, the snap hooks 1011, 1012 are formed as webs inclined inward in the radial direction 601.

[0070] In the unlocked state 600 shown, at least a first snap hook 1011 is locked in a first associated receptacle 1112. In the locked state 700, at least a second snap hook 1012 can be locked in a second associated receptacle 1111. This enables secure and reliable fixation in the unlocked state 600 and the locked state 700. By rotating the actuating sleeve 1222 in the circumferential direction 202, the web 1011 is released from the receptacle 1112, and upon reaching the locked state 700, the web 1012 is forced into the receptacle 1111.

[0071] Two webs 322, 323 are shown for illustrative purposes, with one web 323 being arranged between each two adjacent webs 322. It should be noted that at least one web 322, 323 is present in each case.

[0072] Fig. 13 shows a section of the actuating sleeve 1222 with a snap hook 1011 of Fig. 12, wherein the snap hook 1011 is shown as representative of the snap hooks 1011, 1012. The snap hook 1011 preferably has a thickness 1301. Preferably, the thickness 1301 is between 5 mm and 6 mm.

[0073] Fig. 14 shows the locking unit 1220 of Fig. 1 to Fig. 3, Fig. 6, Fig. 7 and Fig. 12 in the unlocked state 600. This illustrates Fig. 14 the approximately S-shaped guide track 319. The guide element 325 is arranged in the unlocked state 600 shown at an illustrative lower end of the guide track 319.

[0074] Fig. 15 shows the locking unit 1220 of Fig. 14 in the locking state 700, in which the guide element 325 is arranged at an illustrative upper end of the S-shaped guide track 319.

[0075] Fig. 16 shows the locking unit 1220 of Fig. 1 to Fig. 3, Fig. 6, Fig. 7 and Fig. 12 to Fig. 15 in the unlocked state 600. A line 1601 illustrates a force curve in the locked state of the tool attachment 1200 when a tensile force acts on the tool attachment 1200. The tensile force is transmitted via the locking element 352 into the locking sleeve 340. From the locking sleeve 340, the tensile force is diverted via the locking contour 330 into the actuating sleeve 1222.

[0076] Fig. 17 shows the tool attachment 1200 of Fig. 1 with the locking unit 1220, in which the actuating sleeve 1222 is actuated by a rotational movement along the direction of rotation 202.

[0077] Fig. 18 shows the tool attachment 1200 of Fig. 17 with the attachment housing 1210, the angle adjustment member 1215 and the receiving sleeve 350 as well as the actuating sleeve 1222 and the locking sleeve 340, each of which is designed according to a further embodiment.

[0078] Here, the locking sleeve 340 is illustratively formed in two parts, comprising a locking sleeve 1810 and a retaining element 1820. Preferably, the locking sleeve 1810 has at least one receptacle 1813 for placement on the front housing 1210 to form an anti-rotation device. Furthermore, the locking sleeve 1810 has at least one guide element 325 on its outer circumference 1811 for guiding in the guide track 319.

[0079] According to a further embodiment, the at least one guide track 319 is in Fig. 19 is formed on an inner circumference 321 of the actuating sleeve 1222. For this purpose, the actuating sleeve 1222 has a ramp-shaped recess 1801 on its inner circumference 321. The holding element 1820 is preferably arranged facing the ramp-shaped recess 1801. Preferably, the holding element 1820 has a ramp-shaped recess 1822 in sections on its end face 1829. Preferably, the ramp-shaped recess 1801 and the ramp-shaped recess 1822 form the at least one guide track 319.

[0080] Preferably, the holding element 1820 is attached to the actuating sleeve 1222 via a snap-in connection. For this purpose, the holding element 1820 has at least one snap-in hook 1821, and the actuating sleeve 1222 has, on its side facing the angle adjustment member 1215, at least one receptacle 1802 formed on the inner circumference 321 for receiving the snap-in hook 1821.

[0081] Fig. 19 shows the actuating sleeve 1222 and the holding element 1820 of Fig. 18. This illustrates Fig. 19 shows the guide track 319 formed by the ramp-shaped recess 1801 of the actuating sleeve 1222 and the ramp-shaped recess 1822 of the holding element 1820. Furthermore, Fig. 19 the at least one locking hook 1821 of the holding element 1820 arranged in the receptacle 1802 of the actuating sleeve 1222.

[0082] Fig. 20 shows the locking unit 1220 with the actuating sleeve 1222 and the holding element 1820 of Fig. 18 and Fig. 19. This illustrates Fig. 20 shows the arrangement of the at least one locking hook 1821 of the holding element 1820 in the receptacle 1802 of the actuating sleeve 1222. As a result, the ramp-shaped recess 1801 of the actuating sleeve 1222 and the ramp-shaped recess 1822 of the holding element 1820 form the at least one guide track 319. The guide element 325, which is associated with the locking sleeve 1810, is arranged in the guide track 319. Furthermore, Fig. 20 the receptacle 1813 of the locking sleeve 1810 for arrangement on the front housing 1210.

[0083] Fig. 21 shows the actuating sleeve 1222 with the holding element 1820 and the locking sleeve 1810 of Fig. 19 to Fig. 20. This illustrates Fig. 21 a housing web 2110 assigned to the front housing 1210, preferably the housing half-shell 312. The housing web 2110 engages in the receptacle 1813 of the locking sleeve 1810 to prevent rotation.

[0084] Fig. 22 shows the actuating sleeve 1222 with the locking sleeve 1810 of Fig. 18 to Fig. 21, wherein the locking sleeve 1810, according to a further embodiment, has an integrated metal ring 2220 on its locking portion 634. For this purpose, the locking sleeve 1810 has a receptacle 2210 on its inner circumference 2202 for receiving the metal ring 2220. Preferably, the locking sleeve 1810 is made of plastic. Alternatively, the locking sleeve 1810 can be made of metal.

[0085] Fig. 23 shows the locking unit 1220 of Fig. 18 and Fig. 20 with the actuating sleeve 1222 of Fig. 18 to Fig. 22, the holding element 1820 of Fig. 18 to Fig. 21, the locking sleeve 1810 from Fig. 20 to Fig. 22, as well as the bridges 322, 323 of Fig. 18 and Fig. 21. The locking unit 1220 is illustratively arranged in the locking state 700, in which at least one second snap hook 1012 is locked in the second associated receptacle 1111.

[0086] Fig. 24 shows the locking unit 1220 with the actuating sleeve 1222, the holding element 1820, and the locking sleeve 1810 of Fig. 23. This illustrates Fig. 24 shows the ramp-shaped recess 1801 of the actuating sleeve 1222 and the ramp-shaped recess 1822 of the holding element 1820. Furthermore, Fig. 24 shows the receptacle 1802 of the actuating sleeve 1222 and the locking hook 1821 of the holding element 1820. In addition, Fig. 24 the unlocking section 632 and the locking section 634 arranged on the inner circumference of the locking sleeve 1810.

[0087] Fig. 25 shows the locking unit 1220 of Fig. 24 and illustrates the guide element 325 of the locking sleeve 1810 arranged in the guide track 319, wherein the guide track 319 is formed by the ramp-shaped recess 1801 of the actuating sleeve 1222 and the ramp-shaped recess 1822 of the holding element 1820.

[0088] Fig. 26 shows a section of the actuating sleeve 1222 with one of the snap hooks of Fig. 23, whereby the snap hook here represents the snap hooks 1011, 1012 of Fig. 23. The snap hook 1012 preferably has a thickness of 2601. Preferably, the thickness 2601 is between 5.4 mm and 5.8 mm.

[0089] Fig. 27 shows the locking unit 1220 of Fig. 18 to Fig. 26 in the unlocked state 600. This illustrates Fig. 27 the approximately S-shaped guide track 319. The guide element 325 is arranged in the unlocked state 600 shown at an illustrative upper end of the guide track 319.

[0090] Fig. 28 shows the locking unit 1220 of Fig. 27 in the locking state 700, in which the guide element 325 is arranged at an illustrative lower end of the S-shaped guide track 319.

[0091] Fig. 29 shows the locking unit 1220 of Fig. 18 to Fig. 28 in the unlocked state 600. A line 2901 illustrates a force curve in the locked state of the tool attachment 1200 when a tensile force acts on the tool attachment 1200. The tensile force is transmitted via the locking element 352 into the locking sleeve 1810. From the locking sleeve 1810, the tensile force is diverted through the receptacle 1813 into the housing web 2110 of the attachment housing 1210.

Claims

[1] Tool attachment (1200) with a tool holder (1240) for receiving an insert tool and an attachment interface (1250) for arrangement on a machine interface (150) of a hand-held power tool (100), and with a locking unit (1220) which has at least one locking element (352) and is designed to lock the tool attachment (1200) on the machine interface (150) of the hand-held power tool (100) in a locking state (700) and to enable removal of the tool attachment (1200) from the machine interface (150) of the hand-held power tool (100) in an unlocking state (600), wherein the locking unit (1220) has an actuating sleeve (1222) for actuating the locking unit (1220) and a locking sleeve (340; 1810) for locking or releasing the at least one locking element (352) on the machine interface (150) of the hand-held power tool (100), characterized bythat the actuating sleeve (1222) is assigned at least one guide track (319) and at least one guide element (325) which can be guided in the guide track (319), wherein a rotation of the actuating sleeve (1222) in a predetermined direction of rotation (202) about an associated axis of rotation (299) moves the at least one guide element (325) along the guide track (319). [2] Tool attachment according to claim 1, characterized by that the locking sleeve (340; 1810) moves axially along the associated axis of rotation (299) to enable adjustment of the locking state (700) or the unlocking state (600). [3] Tool attachment according to claim 1 or 2, characterized by that the locking sleeve (340; 1810) has on its inner circumference an unlocking portion (632) with a first diameter (636) and a locking portion (634) with a second diameter (638), wherein the first diameter (636) is larger than the second diameter (638). [4] Tool attachment according to claim 2 and 3, characterized by that the locking sleeve (340; 1810) has an integrated metal ring (2220) on its locking section (634). [5] Tool attachment according to one of the preceding claims, characterized by that the actuating sleeve (1222) has at least two snap hooks (1011, 1012) on its inner circumference (321). [6] Tool attachment according to claim 5, characterized by in that the attachment interface (1250) has webs (322, 323) formed in the axial direction (201), each having a receptacle (1111, 1112), wherein at least one first snap hook (1011) latches in a first associated receptacle (1112) in the unlocked state (600), and wherein at least one second snap hook (1012) latches in a second associated receptacle (1111) in the locked state (700). [7] Tool attachment according to one of the preceding claims, characterized bythat an attachment housing (1210) is provided, wherein the at least one guide track (319) is formed on an outer circumference (399) of the attachment housing (1210) and at least one guide element (325) is arranged on an inner circumference (321) of the actuating sleeve (1222). [8] Tool attachment according to claim 7, characterized by that the actuating sleeve (1222) has webs (610, 620) distributed on its inner circumference (321) in the circumferential direction (899), which form a driver receptacle (810) for the locking sleeve (340). [9] Tool attachment according to claim 8, characterized by that the locking sleeve (340) has at least one driving web (341) on its outer circumference (342), wherein the driving web (341) is driven along in the driving receptacle (810) when the actuating sleeve (1222) moves. [10] Tool attachment according to one of claims 1 to 6, characterized bythat the at least one guide track (319) is formed on an inner circumference (321) of the actuating sleeve (1222) and at least one guide element (325) is arranged on an outer circumference (1811) of the locking sleeve (1810). [11] Tool attachment according to claim 10, characterized by that the actuating sleeve (1222) has a ramp-shaped recess (1801) on its inner circumference (321) and a holding element (1820) arranged facing the ramp-shaped recess (1801) is arranged on the inner circumference (321) of the actuating sleeve (1222). [12] Tool attachment according to claim 11, characterized by that the holding element (1820) has a ramp-shaped recess (1822) in sections on its front side (1829), wherein the ramp-shaped recess (1801) and the ramp-shaped recess (1822) form the at least one guide track (319). [13] Tool attachment according to one of claims 10 to 12, characterized bythat the actuating sleeve (1222) has receptacles (1802) on its inner circumference (321) and the holding element (1820) has locking hooks (1821) for locking in the receptacles (1802). [14] Tool attachment according to one of claims 10 to 13, characterized by that an attachment housing (1210) is provided, wherein the locking sleeve (1810) has at least one receptacle (1813) for arrangement on a housing web (2110) of the attachment housing (1210) to form an anti-twist device. [15] Tool system (180) comprising a hand-held power tool (100) having a machine interface (150) for attaching a tool attachment (1200), and comprising a tool attachment (1200) according to one of the preceding claims.

Images