EP2260980A2 - Attachment for a hand tool - Google Patents
Attachment for a hand tool Download PDFInfo
- Publication number
- EP2260980A2 EP2260980A2 EP10174854A EP10174854A EP2260980A2 EP 2260980 A2 EP2260980 A2 EP 2260980A2 EP 10174854 A EP10174854 A EP 10174854A EP 10174854 A EP10174854 A EP 10174854A EP 2260980 A2 EP2260980 A2 EP 2260980A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- attachment
- locking
- housing
- power tool
- locking unit
- 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
Links
- 230000000694 effects Effects 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 description 2
- 230000000295 complement effect Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
Images
Classifications
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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
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- 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
- Y10T279/17128—Self-grasping
- Y10T279/17136—Yielding grasping jaws
- Y10T279/17153—Spring jaws
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- 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
- Y10T279/17761—Side detent
- Y10T279/17786—Spring
-
- 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
- Y10T279/00—Chucks or sockets
- Y10T279/34—Accessory or component
- Y10T279/3406—Adapter
Definitions
- the invention relates to an attachment for a hand tool according to the preamble of claim 1.
- the attachment may e.g. an angular attachment whose output shaft is at an angle to the drive shaft of the power tool.
- eccentric essays with a parallel to the drive shaft of the power tool offset arranged output shaft are known.
- the output shaft of the attachment thereby drives an insert tool received in a tool holder of the attachment, e.g. a screwdriver or drill bit.
- An alternative attachment for a tower is off DE 101 09 956 A1 known.
- the attachment described therein is clamped with a concentric to the drive shaft bayonet connection device in the axial direction against the housing of a power tool.
- the invention relates to an attachment for a hand tool, which is equipped with a rotatably mounted shaft and a locking unit.
- the shaft is indirectly or directly rotatably connected to a drive shaft of the power tool.
- the shaft of the attachment may e.g. with a tool holder for receiving an insert tool, e.g. a ringenburnerbits be equipped so that via the shaft, the recordable in the tool holder insert tool is driven.
- the locking unit of the attachment is releasably attachable to a housing of a hand tool and fixed. It is proposed to provide the locking unit with at least one means for a latching connection.
- the releasable positive connection of the attachment with a housing of a hand tool is thus carried out according to the invention by means of a latching connection.
- It is an elastic locking connection with at least one elastic locking means.
- a latching connection has the advantage that it is easy to handle, since no additional tool is needed as an aid for attaching or detaching the attachment.
- the simple handling of the latching connection is particularly evident in an embodiment in which the at least one latching means is activated automatically, i. without further manual operation of the locking means or other means, is executed detent.
- the locking connection between the attachment and the housing of the power tool is fully automatic, i. without any other action or influence of any other means, effective (autolock function).
- This can be done for example by a resilient latching connection such that a resilient latching means when joining the attachment and the power tool forcibly against the force of the resilient latching means with a corresponding means on the housing of the power tool, e.g. a recess, is engaged.
- Another advantage of a locking connection is that the engagement of the locking means in corresponding means on the housing of the power tool can be audible, so that the operator of the power tool is indicated by a clicking sound when snapping that the article is completely and properly locked to the power tool.
- the at least one locking means is manually operable.
- the locking means may be attached to the locking unit so that it directly from the outside or indirectly via an unlocking element, e.g. a release button in the form of a push button, a slider or the like. manually operable by the operator.
- an unlocking element e.g. a release button in the form of a push button, a slider or the like.
- the operator of the power tool against the spring force of the resilient locking means has to apply force to bring the locking means with the corresponding means on the housing of the power tool disengaged.
- the at least one latching means effects at least one axial securing of the attachment to a housing of a handheld power tool.
- the article is held by the locking means at least in the axial direction.
- the locking means may be provided on a housing of a power tool an annular groove, so that the locking means when attaching the attachment to a housing of a power tool with the annular groove is engageable.
- an axially acting latching means can be designed such that it simultaneously effects an anti-rotation lock.
- the rotation can also be effected by a separate means.
- the locking unit has engagement means for rotationally fixed engagement with a housing of a handheld power tool.
- corresponding engagement means are provided on the housing.
- the mutually associated engagement means are fixedly arranged on the locking unit of the attachment and on the housing of the power tool.
- the engagement means are in particular designed so that already during the axial attachment of the essay on the housing without any other manual operation, the engaging means of attachment and housing engage with each other. As a result, an effective in the circumferential direction positive connection can be produced when attaching the essay.
- the forces acting in the circumferential direction are transmitted by the engagement means to the housing of the power tool, while the axially acting forces are transmitted by the locking means.
- the forces acting in the circumferential direction and in the axial direction are absorbed by different means.
- the engagement means on the locking unit and the housing of the power tool are designed as a toothed ring. If the toothing of the toothed ring is of correspondingly fine design, the attachment can be mounted in virtually any desired angular position relative to the housing of the handheld power tool.
- the at least one latching means is a spring element, i. the locking means is resilient in itself.
- the resilient latching means is formed by one or more leaf springs.
- the at least one leaf spring is used in attaching the locking unit to a housing of a hand tool with suitable engaging means, e.g. an annular groove, automatically engaged.
- a resilient hook is formed, which engages audibly in the annular groove when attaching the attachment to a housing of a power tool.
- a first end of the leaf spring in the locking unit is fixed, while a second end of the leaf spring, which is designed as a hook, is arranged to be movable in the radial direction relative to the locking unit.
- the locking unit further comprises in this embodiment a locking ring, which is rotatably arranged in the locking unit.
- the locking ring can be brought by a manual rotational movement in a locking position or in an unlocked position. In the locked position prevents the locking ring unintentional release of the attachment of a housing of a power tool. In the unlocked position of the locking ring allows the removal of the attachment of a hand tool. This is achieved, for example, in that the locking ring has radially inwardly directed locking projections, which lie in the locking position in the radial direction of the at least one leaf spring and thus prevent a radial movement of the second end of the leaf spring outward against the spring force.
- the at least one leaf spring In the unlatched position, however, the at least one leaf spring is opposite in the radial direction a free space, which permits a radial movement of the second end of the leaf spring outward against the spring force.
- the locking ring To attach and detach the attachment, the locking ring must be brought into the unlocked position.
- a drive shaft of the power tool is brought into rotationally fixed connection with a rotatably mounted shaft of the attachment.
- the rotationally fixed connection can take place immediately.
- the drive shaft at its free end, for example, a polygonal recess.
- a corresponding polygonal extension is formed on the shaft of the attachment, which is received positively by the polygonal recess of the drive shaft.
- the hand tool can be used without attachment, the polygonal StirnausNeillung the drive shaft is shaped so that it can also act as a receptacle for an insert tool, such as screwdriver bit.
- the rotationally fixed connection can also indirectly via a transmission, such as an angle gear, or a clutch, such as a Kochrastkupplung done.
- the article has an input shaft and an output shaft. Input shaft and output shaft are connected via a transmission or a clutch to each other in driving connection.
- the output-side end of the drive shaft and the input-side end of the input shaft are provided with corresponding means to produce a positive rotational connection. If such an attachment attached to a hand tool, the input shaft and the drive shaft of the power tool rotatably mated.
- the shaft of the attachment may further comprise at its output end a tool holder for receiving an insert tool, e.g. a screwdriver or Bohrerbits have.
- the tool holder may be a simple recess on the front side of the shaft. If the attachment has an input and an output shaft, the tool holder is correspondingly arranged on the end face of the output shaft.
- the attachment may e.g. an angular attachment whose output shaft is at an angle to a drive shaft of the power tool, wherein the input shaft of the attachment is connected via an angular gear to the output shaft.
- the attachment may also be e.g. an eccentric with a parallel to a drive shaft of the power tool offset arranged output shaft be.
- the attachment may also be used e.g. be a torque cap, with which the operator of the power tool can set the maximum torque.
- the hand tool can be a battery-powered or network-bound screwdriver, drill, drill or the like. be.
- FIG. 1 a section of a hand tool 100 is shown, which is suitable, a top 30 according to the invention Fig. 2 ).
- Hand tool 100 shown is a screwdriver.
- the hand tool 100 includes, seen in the direction of work, the front portion of a housing 10 from which a drive shaft 20 exits.
- the drive shaft 20 has on its front side a polygonal recess 22 for receiving an insert tool, such as a screwdriver bit (not shown).
- the hand tool 100 can be operated as such, ie without essay.
- a screwdriver bit can be inserted as an insertion tool into the recess 22.
- Fig. 2 is shown as an example of an attachment 30 according to the invention a torque attachment for adjusting the torque.
- the attachment 30 comprises a shaft 32, which on its output side has a recess 34 for receiving an insert tool 36, for example a Screwdriver bits having. If the attachment 30 is attached to the hand tool 100, the shaft 32 is in driving connection with the drive shaft 20 of the power tool 100. In the present case of a torque attachment, the shaft 32 forms an output shaft, which via a Kochrastkupplung (not shown) with an input shaft (not shown). The shaft 32 is indirectly in rotationally fixed connection with the drive shaft 20 of the power tool. The input shaft, not shown, is directly in driving connection with the drive shaft 20 of the power tool as soon as the attachment 30 is attached to the power tool. This can be achieved in a simple embodiment, for example, by a positive connection by the drive shaft 20, as in Fig.
- a polygonal end recess 22 has, and the input shaft of the attachment 30 on the input side with a complementary to the end recess 22 extension is provided with Chrkantigem cross-section (not shown).
- the extension of the input shaft is simply inserted without further action into the recess 22 of the drive shaft 20.
- the attachment 30 further comprises a locking unit 40 for releasable attachment to a housing 10 of a hand tool 100.
- the attachment 30 according to the invention is characterized by a locking unit 40, which has at least one means 42 for an elastic latching connection.
- Such a locking unit 40 is in principle for all possible attachments, which are detachably attachable to a housing of a hand tool, such. Angled attachment or torque attachment, suitable.
- a locking unit 40 which also has a locking means for attaching the attachment 30 to the housing 10 of a power tool.
- a locking means serve in this embodiment, four evenly distributed over the circumference leaf springs 62nd
- the latching means in the form of leaf springs 62, it would also be possible to include not only the axial forces, but also the forces acting in the circumferential direction by the leaf springs 62, provided that the leaf springs 62 would be fixed in the locked state on the housing 10 substantially free of play in the circumferential direction (not shown).
- leaf springs 62 As locking means according to Fig. 3-6 four spring elements in the form of leaf springs 62 are provided.
- the four leaf springs 62 are distributed substantially equidistantly over the circumference of the main body 44 of the locking unit 40.
- the leaf springs 62 are formed so that they automatically engage in the attachment of the attachment 30 to the housing 10 with corresponding means, here a circumferential annular groove 12 on the housing. If the leaf springs 62 are engaged in the annular groove 12, the attachment 30 is locked in the axial direction.
- a first end 65 of the leaf springs 62 is fixedly disposed in the main body 44 of the locking unit 40, while a second end 67 of the leaf springs 62 is arranged to be movable in the radial direction relative to the main body 44 of the locking unit 40.
- the second end 67 of the leaf springs 62 is formed as a hook.
- the leaf springs 62 are in a de-energized state.
- the leaf springs 62 are tensioned without further manual operation by the leaf springs 62 are forced along the housing 10.
- the surfaces 14 of the teeth of the toothed ring 13 are chamfered in the axial direction.
- the tension of the leaf springs 62 is partially released. The engagement of the leaf springs 62 in the annular groove 12 causes a positive fit and prevents inadvertent release of the attachment 30 of the power tool 100 in the axial direction.
- the locking unit 40 further comprises a locking ring 66 which is rotatably mounted on the base body 44.
- Fig. 5 is the locking ring 66 in its unlocked position, in Fig. 6 shown in its locking position.
- the locking ring 66 can be brought by a manual rotational movement in the locked position or in the unlocked position. In the locked position, the locking ring 66 prevents unintentional release of the attachment 30 from a housing 10 of a hand tool. In the unlocked position, the locking ring 66 allows removal of the attachment 30.
- the locking ring 66 has on its inner surface a plurality of circumferentially uniformly distributed, radially inwardly facing locking projections 69.
- the locking projections 69 are radially opposed to the leaf springs 62 so as to block a radial movement of the second end 67 of the leaf springs 62 outward against the spring force. Thus, the leaf springs 62 can not get out of engagement with the annular groove 12.
- the locking ring 66 For attaching and detaching the attachment 30, the locking ring 66 must be brought into the unlocked position only by a manual rotational movement in the circumferential direction of the locking ring 66.
- the locking position and unlocking position of the locking ring 66 are each defined by a stop 49 or 50 on the main body 44 of the locking unit 40.
- a receptacle 61 for a spring-loaded Ball 63 is provided in each case. In the sectional view to Fig. 3 only one picture 61 is shown.
- the base body 44 has for this purpose a ball 63 and a coil spring 64, wherein the coil spring 64 is supported on the base body 44 and the ball 63 presses substantially radially outwardly into the receptacle 61.
- the ball 63 is pressed by means of coil spring 64 in the locking position or unlocking position into the respective receptacle 61 in the locking ring 66. This prevents unintentional release of the locking ring 66 from its locking or unlocking position.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Percussive Tools And Related Accessories (AREA)
- Snaps, Bayonet Connections, Set Pins, And Snap Rings (AREA)
- Gripping On Spindles (AREA)
- Workshop Equipment, Work Benches, Supports, Or Storage Means (AREA)
- Supply And Installment Of Electrical Components (AREA)
- Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
- Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
- Portable Power Tools In General (AREA)
- Loading And Unloading Of Fuel Tanks Or Ships (AREA)
Abstract
Description
Die Erfindung betrifft einen Aufsatz für eine Handwerkzeugmaschine nach dem Oberbegriff des Anspruchs 1.The invention relates to an attachment for a hand tool according to the preamble of claim 1.
Um die Einsatzmöglichkeiten für eine Handwerkzeugmaschine, wie z.B. einen Schrauber oder Bohrschrauber, zu erhöhen, ist aus dem Stand der Technik bekannt, einen Aufsatz an der Handwerkzeugmaschine anzubringen. Der Aufsatz kann z.B. ein Winkelaufsatz sein, dessen Ausgangswelle in einem Winkel zu der Antriebswelle der Handwerkzeugmaschine steht. Auch Exzenteraufsätze mit einer parallel zur Antriebswelle der Handwerkzeugmaschine versetzt angeordneten Ausgangswelle sind bekannt. Die Ausgangswelle des Aufsatzes treibt dabei ein in einer Werkzeugaufnahme des Aufsatzes aufgenommenes Einsatzwerkzeug, z.B. ein Schrauber- oder Bohrerbit an.In order to make the possible applications for a hand tool, such. To increase a screwdriver or drill, is known from the prior art to attach an attachment to the power tool. The attachment may e.g. an angular attachment whose output shaft is at an angle to the drive shaft of the power tool. Also eccentric essays with a parallel to the drive shaft of the power tool offset arranged output shaft are known. The output shaft of the attachment thereby drives an insert tool received in a tool holder of the attachment, e.g. a screwdriver or drill bit.
Zum lösbaren Anbringen eines Aufsatzes an einem Gehäuse einer Handwerkzeugmaschine sind unterschiedliche Befestigungsarten bekannt. Herkömmliche Aufsätze werden an einem Spannhals des Handwerkzeugmaschinengehäuses fest gespannt. Hierfür ist ein zusätzliches Werkzeug erforderlich.For releasably attaching an attachment to a housing of a power tool different types of attachment are known. Conventional essays are tightened on a clamping neck of the power tool housing. This requires an additional tool.
Eine alternative Befestigungsart für einen Aufsatz ist aus
Die Erfindung geht aus von einem Aufsatz für eine Handwerkzeugmaschine, welcher mit einer drehbar gelagerten Welle sowie einer Verriegelungseinheit ausgestattet ist. Die Welle ist mit einer Antriebswelle der Handwerkzeugmaschine mittelbar oder unmittelbar drehfest verbindbar. Die Welle des Aufsatzes kann z.B. mit einer Werkzeugaufnahme zur Aufnahme eines Einsatzwerkzeuges, z.B. eines Schraubendreherbits, ausgestattet sein, so dass über die Welle das in der Werkzeugaufnahme aufnehmbare Einsatzwerkzeug antreibbar ist. Die Verriegelungseinheit des Aufsatzes ist an einem Gehäuse einer Handwerkzeugmaschine lösbar und feststehend anbringbar. Es wird vorgeschlagen, die Verriegelungseinheit mit zumindest einem Mittel für eine Rastverbindung zu versehen. Die lösbare formschlüssige Verbindung des Aufsatzes mit einem Gehäuse einer Handwerkzeugmaschine erfolgt demnach erfindungsgemäß mittels einer Rastverbindung. Dabei handelt es sich um eine elastische Rastverbindung mit zumindest einem elastischen Rastmittel. Eine Rastverbindung hat den Vorteil, dass sie einfach handhabbar ist, da kein zusätzliches Werkzeug als Hilfsmittel zum Anbringen oder Lösen des Aufsatzes benötigt wird.The invention relates to an attachment for a hand tool, which is equipped with a rotatably mounted shaft and a locking unit. The shaft is indirectly or directly rotatably connected to a drive shaft of the power tool. The shaft of the attachment may e.g. with a tool holder for receiving an insert tool, e.g. a Schraubendreherbits be equipped so that via the shaft, the recordable in the tool holder insert tool is driven. The locking unit of the attachment is releasably attachable to a housing of a hand tool and fixed. It is proposed to provide the locking unit with at least one means for a latching connection. The releasable positive connection of the attachment with a housing of a hand tool is thus carried out according to the invention by means of a latching connection. It is an elastic locking connection with at least one elastic locking means. A latching connection has the advantage that it is easy to handle, since no additional tool is needed as an aid for attaching or detaching the attachment.
Die einfache Handhabung der Rastverbindung zeigt sich insbesondere in einer Ausführungsform, in der das zumindest eine Rastmittel selbsttätig, d.h. ohne weitere manuelle Betätigung des Rastmittels oder eines anderen Mittels, rastend ausgeführt ist. Dies bedeutet, dass bereits beim axialen Ansetzen des Aufsatzes an das Gehäuse einer Handwerkzeugmaschine das zumindest eine Rastmittel in korrespondierende Mittel an dem Gehäuse der Handwerkzeugmaschine rastend eingreift. Die Rastverbindung zwischen Aufsatz und Gehäuse der Handwerkzeugmaschine wird dabei vollautomatisch, d.h. ohne sonstigen Handgriff oder Einwirkung eines sonstigen Hilfsmittels, wirksam (Autolock-Funktion). Dies kann beispielsweise durch eine federnde Rastverbindung derart erfolgen, dass ein federndes Rastmittel beim Zusammenfügen des Aufsatzes und der Handwerkzeugmaschine zwangsgeführt entgegen der Kraft des federnden Rastmittels mit einem korrespondierenden Mittel am Gehäuse der Handwerkzeugmaschine, z.B. einer Ausnehmung, in Eingriff gebracht wird.The simple handling of the latching connection is particularly evident in an embodiment in which the at least one latching means is activated automatically, i. without further manual operation of the locking means or other means, is executed detent. This means that the axial attachment of the attachment to the housing of a handheld power tool engages the at least one locking means in corresponding means on the housing of the power tool detent. The locking connection between the attachment and the housing of the power tool is fully automatic, i. without any other action or influence of any other means, effective (autolock function). This can be done for example by a resilient latching connection such that a resilient latching means when joining the attachment and the power tool forcibly against the force of the resilient latching means with a corresponding means on the housing of the power tool, e.g. a recess, is engaged.
Ein weiterer Vorteil einer Rastverbindung liegt darin, dass das Einrasten des Rastmittels in korrespondierende Mittel am Gehäuse der Handwerkzeugmaschine hörbar erfolgen kann, so dass dem Bediener der Handwerkzeugmaschine durch ein Klick-Geräusch beim Einrasten angezeigt wird, dass der Aufsatz vollständig und ordnungsgemäß mit der Handwerkzeugmaschine verriegelt ist.Another advantage of a locking connection is that the engagement of the locking means in corresponding means on the housing of the power tool can be audible, so that the operator of the power tool is indicated by a clicking sound when snapping that the article is completely and properly locked to the power tool.
Zum Lösen der Rastverbindung, und damit zum Abnehmen des Aufsatzes von der Handwerkzeugmaschine, ist das zumindest eine Rastmittel von Hand betätigbar. Das Rastmittel kann dabei an der Verriegelungseinheit so angebracht sein, dass es direkt von außen oder indirekt über ein Entriegelungselement, z.B. eine Entriegelungstaste in Form einer Drucktaste, einen Schieber o.dgl. durch den Bediener manuell betätigbar ist. Im Falle einer federnden Rastverbindung muss der Bediener der Handwerkzeugmaschine entgegen der Federkraft des federnden Rastmittels Kraft aufbringen, um das Rastmittel mit dem korrespondierenden Mittel an dem Gehäuse der Handwerkzeugmaschine außer Eingriff zu bringen.To release the locking connection, and thus to remove the attachment of the power tool, the at least one locking means is manually operable. The locking means may be attached to the locking unit so that it directly from the outside or indirectly via an unlocking element, e.g. a release button in the form of a push button, a slider or the like. manually operable by the operator. In the case of a resilient locking connection, the operator of the power tool against the spring force of the resilient locking means has to apply force to bring the locking means with the corresponding means on the housing of the power tool disengaged.
Gemäß einer Ausführungsform des erfindungsgemäßen Aufsatzes bewirkt das zumindest eine Rastmittel zumindest eine axiale Sicherung des Aufsatzes an einem Gehäuse einer Handwerkzeugmaschine. So wird der Aufsatz durch das Rastmittel zumindest in axialer Richtung gehalten. Beispielsweise kann an einem Gehäuse einer Handwerkzeugmaschine eine Ringnut vorgesehen sein, so dass das Rastmittel beim Ansetzen des Aufsatzes an ein Gehäuse einer Handwerkzeugmaschine mit der Ringnut in Eingriff bringbar ist.According to one embodiment of the attachment according to the invention, the at least one latching means effects at least one axial securing of the attachment to a housing of a handheld power tool. Thus, the article is held by the locking means at least in the axial direction. For example, may be provided on a housing of a power tool an annular groove, so that the locking means when attaching the attachment to a housing of a power tool with the annular groove is engageable.
Um die auf den Aufsatz in Umfangsrichtung wirkenden Kräfte aufzunehmen, können unterschiedliche Mittel vorgesehen sein. Zum einen kann ein axial wirkendes Rastmittel so ausgebildet sein, dass es gleichzeitig auch eine Verdrehsicherung bewirkt.To accommodate the forces acting on the attachment in the circumferential direction, different means may be provided. On the one hand, an axially acting latching means can be designed such that it simultaneously effects an anti-rotation lock.
Zum anderen kann die Verdrehsicherung auch durch ein separates Mittel bewirkt werden. Gemäß einer Ausführungsform des erfindungsgemäßen Aufsatzes weist die Verriegelungseinheit Eingriffsmittel zum verdrehfesten Eingriff mit einem Gehäuse einer Handwerkzeugmaschine auf. Hierfür sind an dem Gehäuse korrespondierende Eingriffsmittel vorgesehen. Die einander zugeordneten Eingriffsmittel sind an der Verriegelungseinheit des Aufsatzes und an dem Gehäuse der Handwerkzeugmaschine feststehend angeordnet. Dabei sind die Eingriffsmittel insbesondere so ausgestaltet, dass bereits beim axialen Ansetzen des Aufsatzes an dem Gehäuse ohne sonstige manuelle Betätigung die Eingriffsmittel von Aufsatz und Gehäuse miteinander in Eingriff gelangen. Dadurch ist beim Ansetzen des Aufsatzes eine in Umfangsrichtung wirksame formschlüssige Verbindung herstellbar. In dieser Ausführungsform des Aufsatzes werden die in Umfangsrichtung wirkenden Kräfte durch die Eingriffsmittel auf das Gehäuse der Handwerkzeugmaschine übertragen, während die axial wirkenden Kräfte durch die Rastmittel übertragen werden. Somit werden die in Umfangsrichtung und die in axialer Richtung wirkenden Kräfte von unterschiedlichen Mitteln aufgenommen.On the other hand, the rotation can also be effected by a separate means. According to one embodiment of the attachment according to the invention, the locking unit has engagement means for rotationally fixed engagement with a housing of a handheld power tool. For this purpose, corresponding engagement means are provided on the housing. The mutually associated engagement means are fixedly arranged on the locking unit of the attachment and on the housing of the power tool. In this case, the engagement means are in particular designed so that already during the axial attachment of the essay on the housing without any other manual operation, the engaging means of attachment and housing engage with each other. As a result, an effective in the circumferential direction positive connection can be produced when attaching the essay. In this embodiment of the article, the forces acting in the circumferential direction are transmitted by the engagement means to the housing of the power tool, while the axially acting forces are transmitted by the locking means. Thus, the forces acting in the circumferential direction and in the axial direction are absorbed by different means.
Vorzugsweise sind die Eingriffsmittel an der Verriegelungseinheit und am Gehäuse der Handwerkzeugmaschine als Verzahnungskranz ausgeführt. Ist die Verzahnung des Verzahnungskranzes entsprechend fein ausgebildet, kann der Aufsatz in praktisch jeder beliebigen Winkelstellung relativ zu dem Gehäuse der Handwerkzeugmaschine angebracht werden.Preferably, the engagement means on the locking unit and the housing of the power tool are designed as a toothed ring. If the toothing of the toothed ring is of correspondingly fine design, the attachment can be mounted in virtually any desired angular position relative to the housing of the handheld power tool.
Bei dem erfindungsgemäßen Aufsatz ist das zumindest eine Rastmittel ein Federelement, d.h. das Rastmittel ist in sich federnd.In the attachment according to the invention, the at least one latching means is a spring element, i. the locking means is resilient in itself.
Das in sich federnde Rastmittel (Federelement) wird durch eine oder mehrere Blattfedern gebildet. Die mindestens eine Blattfeder wird beim Ansetzen der Verriegelungseinheit an ein Gehäuse einer Handwerkzeugmaschine mit geeigneten Eingriffsmitteln, z.B. einer Ringnut, selbsttätig in Eingriff gebracht. An der Blattfeder ist ein federnder Haken ausgebildet, der beim Ansetzen des Aufsatzes an ein Gehäuse einer Handwerkzeugmaschine hörbar in die Ringnut einrastet. Dabei ist ein erstes Ende der Blattfeder in der Verriegelungseinheit feststehend angeordnet, während ein zweites Ende der Blattfeder, welches als Haken ausgebildet ist, in radialer Richtung relativ zu der Verriegelungseinheit bewegbar angeordnet ist. So wird beim Ansetzen des Aufsatzes der Haken der Blattfeder entlang einer Auflaufschräge des Gehäuses radial nach außen geführt, wodurch die Blattfeder entgegen ihrer Federkraft gespannt wird.The resilient latching means (spring element) is formed by one or more leaf springs. The at least one leaf spring is used in attaching the locking unit to a housing of a hand tool with suitable engaging means, e.g. an annular groove, automatically engaged. On the leaf spring, a resilient hook is formed, which engages audibly in the annular groove when attaching the attachment to a housing of a power tool. In this case, a first end of the leaf spring in the locking unit is fixed, while a second end of the leaf spring, which is designed as a hook, is arranged to be movable in the radial direction relative to the locking unit. Thus, when attaching the attachment of the hook of the leaf spring along a ramp of the housing is guided radially outwards, whereby the leaf spring is tensioned against its spring force.
Die Verriegelungseinheit weist in dieser Ausführungsform ferner einen Verriegelungsring auf, welcher drehbar in der Verriegelungseinheit angeordnet ist. Der Verriegelungsring kann durch eine manuelle Drehbewegung in eine Verriegelungsstellung oder in eine Entriegelungsstellung gebracht werden. In der Verriegelungsstellung verhindert der Verriegelungsring ein unbeabsichtigtes Lösen des Aufsatzes von einem Gehäuse einer Handwerkzeugmaschine. In der Entriegelungsstellung erlaubt der Verriegelungsring das Abnehmen des Aufsatzes von einer Handwerkzeugmaschine. Dies wird beispielsweise dadurch erreicht, dass der Verriegelungsring radial nach innen weisende Verriegelungsvorsprünge aufweist, welche in der Verriegelungsstellung in radialer Richtung der mindestens einen Blattfeder gegenüber liegen und so eine radiale Bewegung des zweiten Endes der Blattfeder nach außen entgegen der Federkraft verhindern. In der Entriegelungsstellung hingegen liegt der mindestens einen Blattfeder in radialer Richtung ein Freiraum gegenüber, welcher eine radiale Bewegung des zweiten Endes der Blattfeder nach außen entgegen der Federkraft zulässt. Zum Anbringen und Abnehmen des Aufsatzes muss der Verriegelungsring jeweils in die Entriegelungsstellung gebracht werden.The locking unit further comprises in this embodiment a locking ring, which is rotatably arranged in the locking unit. The locking ring can be brought by a manual rotational movement in a locking position or in an unlocked position. In the locked position prevents the locking ring unintentional release of the attachment of a housing of a power tool. In the unlocked position of the locking ring allows the removal of the attachment of a hand tool. This is achieved, for example, in that the locking ring has radially inwardly directed locking projections, which lie in the locking position in the radial direction of the at least one leaf spring and thus prevent a radial movement of the second end of the leaf spring outward against the spring force. In the unlatched position, however, the at least one leaf spring is opposite in the radial direction a free space, which permits a radial movement of the second end of the leaf spring outward against the spring force. To attach and detach the attachment, the locking ring must be brought into the unlocked position.
Beim Anbringen des Aufsatzes auf ein Gehäuse einer Handwerkzeugmaschine wird außerdem eine Antriebswelle der Handwerkzeugmaschine mit einer drehbar gelagerten Welle des Aufsatzes in drehfeste Verbindung gebracht. Die drehfeste Verbindung kann unmittelbar erfolgen. Hierfür weist die Antriebswelle an ihrem freien Ende z.B. eine mehrkantige Ausnehmung auf. An der Welle des Aufsatzes hingegen ist ein korrespondierender mehrkantiger Fortsatz ausgebildet, der von der mehrkantigen Ausnehmung der Antriebswelle formschlüssig aufgenommen wird. Beim Ansetzen des Aufsatzes können somit die Antriebswelle und die Welle des Aufsatzes ohne zusätzliche manuelle Betätigung drehfest zusammengesteckt werden. Damit die Handwerkzeugmaschine auch ohne Aufsatz eingesetzt werden kann, ist die mehrkantige Stirnausnehmung der Antriebswelle so geformt, dass sie zugleich auch als Aufnahme für ein Einsatzwerkzeug, z.B. Schraubendreherbit, fungieren kann. Die drehfeste Verbindung kann jedoch auch mittelbar über ein Getriebe, z.B. ein Winkelgetriebe, oder eine Kupplung, z.B. eine Überrastkupplung, erfolgen. Dann weist der Aufsatz eine Eingangswelle und eine Ausgangswelle auf. Eingangswelle und Ausgangswelle stehen über ein Getriebe oder eine Kupplung zueinander in treibender Verbindung. In dieser Ausführungsform sind das ausgangsseitige Ende der Antriebswelle und das eingangsseitige Ende der Eingangswelle mit korrespondierenden Mitteln versehen, um eine formschlüssige drehfeste Verbindung zu erzeugen. Wird ein derartiger Aufsatz an einer Handwerkzeugmaschine angebracht, werden die Eingangswelle und die Antriebswelle der Handwerkzeugmaschine drehfest zusammengesteckt.When attaching the attachment to a housing of a power tool also a drive shaft of the power tool is brought into rotationally fixed connection with a rotatably mounted shaft of the attachment. The rotationally fixed connection can take place immediately. For this purpose, the drive shaft at its free end, for example, a polygonal recess. On the other hand, a corresponding polygonal extension is formed on the shaft of the attachment, which is received positively by the polygonal recess of the drive shaft. When attaching the essay thus the drive shaft and the shaft of the attachment can be assembled rotatably without additional manual operation. Thus, the hand tool can be used without attachment, the polygonal Stirnausnehmung the drive shaft is shaped so that it can also act as a receptacle for an insert tool, such as screwdriver bit. However, the rotationally fixed connection can also indirectly via a transmission, such as an angle gear, or a clutch, such as a Überrastkupplung done. Then the article has an input shaft and an output shaft. Input shaft and output shaft are connected via a transmission or a clutch to each other in driving connection. In this embodiment, the output-side end of the drive shaft and the input-side end of the input shaft are provided with corresponding means to produce a positive rotational connection. If such an attachment attached to a hand tool, the input shaft and the drive shaft of the power tool rotatably mated.
Die Welle des Aufsatzes kann ferner an ihrem ausgangsseitigen Ende eine Werkzeugaufnahme zur Aufnahme eines Einsatzwerkzeuges, z.B. eines Schrauber- oder Bohrerbits, aufweisen. Die Werkzeugaufnahme kann eine einfache Ausnehmung an der Stirnseite der Welle sein. Hat der Aufsatz eine Eingangs- und eine Ausgangswelle, ist die Werkzeugaufnahme entsprechend an der Stirnseite der Ausgangswelle angeordnet.The shaft of the attachment may further comprise at its output end a tool holder for receiving an insert tool, e.g. a screwdriver or Bohrerbits have. The tool holder may be a simple recess on the front side of the shaft. If the attachment has an input and an output shaft, the tool holder is correspondingly arranged on the end face of the output shaft.
Der Aufsatz kann z.B. ein Winkelaufsatz sein, dessen Ausgangswelle in einem Winkel zu einer Antriebswelle der Handwerkzeugmaschine steht, wobei die Eingangswelle des Aufsatzes über ein Winkelgetriebe mit der Ausgangswelle verbunden ist.The attachment may e.g. an angular attachment whose output shaft is at an angle to a drive shaft of the power tool, wherein the input shaft of the attachment is connected via an angular gear to the output shaft.
Der Aufsatz kann auch z.B. ein Exzenteraufsatz mit einer parallel zu einer Antriebswelle der Handwerkzeugmaschine versetzt angeordneten Ausgangswelle sein.The attachment may also be e.g. an eccentric with a parallel to a drive shaft of the power tool offset arranged output shaft be.
Der Aufsatz kann ferner z.B. ein Drehmomentaufsatz sein, mit dem der Bediener der Handwerkzeugmaschine das maximale Drehmoment einstellen kann.The attachment may also be used e.g. be a torque cap, with which the operator of the power tool can set the maximum torque.
Ein weiterer Gegenstand der Erfindung ist eine Handwerkzeugmaschine, welche einen erfindungsgemäßen Aufsatz enthält. Die Handwerkzeugmaschine kann ein akkubetriebener oder netzgebundener Schrauber, Bohrer, Bohrschrauber o.dgl. sein.Another object of the invention is a hand tool, which contains an article according to the invention. The hand tool can be a battery-powered or network-bound screwdriver, drill, drill or the like. be.
Nachfolgend wird die Erfindung anhand der beigefügten Zeichnungen näher erläutert. Es zeigen
- Figur 1
- einen Ausschnitt aus einer Handwerkzeugmaschine mit einer Antriebs- welle und einer Werkzeugaufnahme in perspektivischer Darstellung
- Figur 2
- eine Seitenansicht einer Ausführungsform eines erfindungsgemäßen Aufsatzes mit einer Welle sowie einer Verriegelungseinheit
- Figur 3
- ein Längsschnitt durch eine alternative Ausführungsform einer Verrie- gelungseinheit, bestehend aus Grundkörper, Blattfedern als Rastmittel und Verriegelungsring
- Figur 4
- die Verriegelungseinheit nach
Fig. 3 in perspektivischer Darstellung - Figur 5
- die Verriegelungseinheit nach
Fig. 3 in der Entriegelungsstellung in der Rückansicht - Figur 6
- die Verriegelungseinheit nach
Fig. 3 in der Verriegelungsstellung in der Rückansicht.
- FIG. 1
- a section of a hand tool with a drive shaft and a tool holder in perspective view
- FIG. 2
- a side view of an embodiment of an article according to the invention with a shaft and a locking unit
- FIG. 3
- a longitudinal section through an alternative embodiment of a Verrie- gelungseinheit consisting of base body, leaf springs as locking means and locking ring
- FIG. 4
- the locking unit after
Fig. 3 in perspective view - FIG. 5
- the locking unit after
Fig. 3 in the unlocked position in the rear view - FIG. 6
- the locking unit after
Fig. 3 in the locking position in the rear view.
In
In
Der Aufsatz 30 umfasst eine Welle 32, welche ausgangsseitig an ihrer Stirnseite eine Ausnehmung 34 zur Aufnahme eines Einsatzwerkzeuges 36, z.B. eines Schraubendreherbits, aufweist. Wird der Aufsatz 30 an der Handwerkzeugmaschine 100 angebracht, steht die Welle 32 in treibender Verbindung mit der Antriebswelle 20 der Handwerkzeugmaschine 100. Im vorliegenden Fall eines Drehmomentaufsatzes bildet die Welle 32 eine Ausgangswelle, die über eine Überrastkupplung (nicht dargestellt) mit einer Eingangswelle (nicht dargestellt) in Verbindung steht. Die Welle 32 steht dabei mittelbar in drehfester Verbindung mit der Antriebswelle 20 der Handwerkzeugmaschine. Die nicht dargestellte Eingangswelle steht unmittelbar in treibender Verbindung mit der Antriebswelle 20 der Handwerkzeugmaschine, sobald der Aufsatz 30 an der Handwerkzeugmaschine angebracht ist. Dies kann in einer einfachen Ausführungsform beispielsweise durch einen Formschluss erzielt werden, indem die Antriebswelle 20, wie in
Der Aufsatz 30 umfasst weiterhin eine Verriegelungseinheit 40 zum lösbaren Anbringen an einem Gehäuse 10 einer Handwerkzeugmaschine 100. Der erfindungsgemäße Aufsatz 30 zeichnet sich durch eine Verriegelungseinheit 40 aus, welche zumindest ein Mittel 42 für eine elastische Rastverbindung aufweist. Eine derartige Verriegelungseinheit 40 ist prinzipiell für alle möglichen Aufsätze, die lösbar an einem Gehäuse einer Handwerkzeugmaschine anbringbar sind, wie z.B. Winkelaufsatz oder Drehmomentaufsatz, geeignet.The
In
Die in Umfangsrichtung wirkenden Kräfte werden durch die Eingriffsmittel 43, 13 auf das Gehäuse 10 der Handwerkzeugmaschine 100 übertragen, während die axial wirkenden Kräfte durch die Rastmittel 62 übertragen werden. Bei der Ausführungsform der Rastmittel in Form von Blattfedern 62 wäre es jedoch ebenso möglich, nicht nur die axialen Kräfte, sondern auch die in Umfangsrichtung wirkenden Kräfte durch die Blattfedern 62 aufzunehmen, sofern die Blattfedern 62 im eingerasteten Zustand an dem Gehäuse 10 im Wesentlichen spielfrei in Umfangsrichtung festgelegt wären (nicht dargestellt).The forces acting in the circumferential direction are transmitted by the engagement means 43, 13 to the
Als Rastmittel gemäß
Ein erstes Ende 65 der Blattfedern 62 ist in dem Grundkörper 44 der Verriegelungseinheit 40 feststehend angeordnet, während ein zweites Ende 67 der Blattfedern 62 in radialer Richtung relativ zu dem Grundkörper 44 der Verriegelungseinheit 40 bewegbar angeordnet ist. Das zweite Ende 67 der Blattfedern 62 ist als Haken ausgebildet. Wird das zweite, frei bewegbare Ende 67 der Blattfedern 62 in radialer Richtung nach außen bewegt, geraten die Blattfedern 62 unter Spannung. Wird die Spannung gelöst, kehrt das freie Ende 67 wieder in seine Ausgangslage zurück. Die Elastizität der Blattfedern 62 wird genutzt, um ein selbsttätiges Einrasten zu bewirken. In der Ausgangslage, d.h. vor dem Ansetzen des Aufsatzes 30 an das Gehäuse 10, befinden sich die Blattfedern 62 in spannungsfreiem Zustand. Beim Ansetzen des Aufsatzes 30 an das Gehäuse 10 werden die Blattfedern 62 ohne weitere manuelle Betätigung gespannt, indem die Blattfedern 62 entlang des Gehäuses 10 zwangsgeführt werden. Um die Zwangsführung der Blattfedern 62 an dem Gehäuse 10 zu erleichtern, sind die Oberflächen 14 der Zähne des Verzahnungskranzes 13 in axialer Richtung abgeschrägt. Wenn die Blattfedern 62 in Eingriff mit der Ringnut 12 am Gehäuse 10 gelangt, wird die Spannung der Blattfedern 62 teilweise wieder gelöst. Der Eingriff der Blattfedern 62 in der Ringnut 12 bewirkt einen sicheren Formschluss und verhindert ein unbeabsichtigtes Lösen des Aufsatzes 30 von der Handwerkzeugmaschine 100 in axialer Richtung.A
Zum Verriegeln und Entriegeln umfasst die Verriegelungseinheit 40 weiterhin einen Verriegelungsring 66, der auf dem Grundkörper 44 drehbar angeordnet ist. In
Der Verriegelungsring 66 kann durch eine manuelle Drehbewegung in die Verriegelungsstellung oder in die Entriegelungsstellung gebracht werden. In der Verriegelungsstellung verhindert der Verriegelungsring 66 ein unbeabsichtigtes Lösen des Aufsatzes 30 von einem Gehäuse 10 einer Handwerkzeugmaschine. In der Entriegelungsstellung erlaubt der Verriegelungsring 66 das Abnehmen des Aufsatzes 30. Hierfür weist der Verriegelungsring 66 an seiner Innenfläche mehrere in Umfangsrichtung gleichmäßig verteilte, radial nach innen weisende Verriegelungsvorsprünge 69 aufweist. In der Verriegelungsstellung nach
In der Entriegelungsstellung nach
Zum Anbringen und Abnehmen des Aufsatzes 30 muss der Verriegelungsring 66 lediglich durch eine manuelle Drehbewegung in Umfangsrichtung des Verriegelungsrings 66 jeweils in die Entriegelungsstellung gebracht werden. Die Verriegelungsstellung und Entriegelungsstellung des Verriegelungsrings 66 sind jeweils durch einen Anschlag 49 bzw. 50 an dem Grundkörper 44 der Verriegelungseinheit 40 definiert. Um den Verriegelungsring 66 in der Verriegelungs- bzw. Entriegelungsposition zu halten, ist in dem Verriegelungsring 66 für die Verriegelungsposition und die Entriegelungsposition jeweils eine Aufnahme 61 für eine federbelastete Kugel 63 vorgesehen. In der Schnittdarstellung nach
Claims (10)
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EP07821375A EP2101959B1 (en) | 2006-12-08 | 2007-10-16 | Adapter for a handheld machine tool |
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RU2260148C2 (en) | 2003-12-03 | 2005-09-10 | Открытое акционерное общество "ГАЗ" | Quick-disconnect coupling |
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-
2007
- 2007-02-08 DE DE102007006329A patent/DE102007006329A1/en not_active Withdrawn
- 2007-10-16 RU RU2009125671/02A patent/RU2478035C2/en not_active IP Right Cessation
- 2007-10-16 WO PCT/EP2007/061009 patent/WO2008068100A1/en active Application Filing
- 2007-10-16 CN CN201210122713.6A patent/CN102632487B/en active Active
- 2007-10-16 EP EP10174854A patent/EP2260980B1/en active Active
- 2007-10-16 EP EP07821375A patent/EP2101959B1/en active Active
- 2007-10-16 CN CN200780045428.6A patent/CN101553344B/en active Active
- 2007-10-16 DE DE502007006139T patent/DE502007006139D1/en active Active
- 2007-10-16 US US12/513,306 patent/US8360439B2/en active Active
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10109956A1 (en) | 2000-05-17 | 2001-11-22 | Tts Tooltechnic Systems Ag | Hand tool machine with drive shaft driven to rotate and to which drill chuck can be connected together with ancillary apparatus with output shaft exchangeable with drill chuck |
Also Published As
Publication number | Publication date |
---|---|
DE502007006139D1 (en) | 2011-02-10 |
EP2260980B1 (en) | 2012-07-04 |
WO2008068100A1 (en) | 2008-06-12 |
DE102007006329A1 (en) | 2008-06-19 |
US8360439B2 (en) | 2013-01-29 |
RU2478035C2 (en) | 2013-03-27 |
CN102632487A (en) | 2012-08-15 |
CN101553344B (en) | 2012-07-04 |
EP2101959B1 (en) | 2010-12-29 |
RU2009125671A (en) | 2011-01-20 |
CN102632487B (en) | 2014-09-24 |
EP2101959A1 (en) | 2009-09-23 |
EP2260980A3 (en) | 2011-05-11 |
CN101553344A (en) | 2009-10-07 |
US20100108338A1 (en) | 2010-05-06 |
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