EP1930125B1 - Attachment for a hand tool - Google Patents
Attachment for a hand tool Download PDFInfo
- Publication number
- EP1930125B1 EP1930125B1 EP07118573.0A EP07118573A EP1930125B1 EP 1930125 B1 EP1930125 B1 EP 1930125B1 EP 07118573 A EP07118573 A EP 07118573A EP 1930125 B1 EP1930125 B1 EP 1930125B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- power tool
- portable power
- attachment
- housing
- tool according
- 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.)
- Active
Links
- 230000008878 coupling Effects 0.000 description 16
- 238000010168 coupling process Methods 0.000 description 16
- 238000005859 coupling reaction Methods 0.000 description 16
- 230000000694 effects Effects 0.000 description 5
- 210000000078 claw Anatomy 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 230000000295 complement effect Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B23/00—Details of, or accessories for, spanners, wrenches, screwdrivers
- B25B23/14—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers
- B25B23/141—Mechanical overload release couplings
-
- 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
-
- 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
- Y10T279/17957—Friction grip
- Y10T279/17965—Drill type
Definitions
- the invention relates to a hand tool according to the preamble of claim 1.
- a hand tool according to the preamble of claim 1.
- Such a device is made EP 1724068 A known.
- the invention according to claim 1 is based on a hand tool and an attachment, which is releasably attachable by means of a locking unit to a housing of the power tool.
- the attachment comprises an output shaft, which is rotatably connected to a drive shaft of the power tool, and a tool holder for receiving an insert tool, e.g. a screwdriver bit.
- the Wheelmomenteinstell device is manually operated without additional tools or tools.
- the Drehmomenteinstell device allows the operator to set the suitable maximum torque for each operation on the attachment. Upon reaching the preset torque, the output shaft of the attachment is disconnected from the drive shaft.
- the Drehmomenteinstell device has a Kochrastkupplung with two coupling halves, wherein an input shaft of the attachment are equipped with a first coupling half and an output shaft with a second coupling half.
- At least one of the two coupling halves is acted upon by a spring force, wherein the spring force is adjustable.
- the spring force determines the torque that is transferable from the input shaft to the output shaft. If the torque is too high, the coupling halves, and thus the tool holder of the attachment and the drive shaft of the power tool, are separated from each other.
- the device is provided with an actuator.
- the actuator is manually operable without further aids.
- the adjusting element is preferably a rotatably mounted adjusting ring.
- the setting can be stepless or in steps.
- the Matterrastkupplung is a frictional clutch, in particular a slip clutch.
- the coupling halves are designed in the form of raster discs.
- the drive shaft of the power tool When attaching the attachment to a housing of a power tool, the drive shaft of the power tool is brought into rotationally fixed connection with the input shaft of the attachment.
- the drive shaft at its free end a polygonal recess.
- a corresponding polygonal extension is formed on the input shaft of the attachment, which is received in a form-fitting manner by the polygonal recess of the drive shaft.
- the attachment For attaching the attachment to the power tool different types of attachment are possible. From the prior art, e.g. the releasable attachment by means of a bayonet connection or a screw connection known.
- the fastening takes place by means of a latching connection.
- the locking unit of the attachment, with which the attachment is releasably attachable to a housing of a hand tool comprises at least one means for a, in particular elastic, latching connection.
- 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 ease of use of the locking connection is particularly evident in an embodiment in which the at least one locking means automatically, ie without further manual actuation of the locking means or other means, is executed detent.
- the locking connection between the attachment and housing of the power tool is fully automatic, ie without any other action or action of any other means, effective (autolock function).
- a resilient latching connection such that a resilient latching means during assembly of 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, such as a recess, is engaged.
- the locking means may be a separate component which is attached to the locking unit of the attachment. However, it may also be designed in one piece with the locking unit, by being integrally formed on the locking unit. If the locking unit is made of plastic, for example, it is possible to use one or more locking means, e.g. in the form of latching hooks to the locking unit.
- the at least one latching means is a spring element, i. the locking means is resilient in itself.
- the spring element is an annular spring, which is accommodated as a separate component in the locking unit.
- the annular spring is designed so that it can be brought into engagement with the attachment of the attachment to a housing of a hand tool with an annular groove which is provided on the housing of the power tool, automatically engaged. If the annular spring is brought into engagement with the annular groove, the attachment is locked in the axial direction.
- a first end of the annular spring is fixedly arranged in the locking unit, while a second end of the annular spring is arranged to be movable in the circumferential direction relative to the locking unit. Is the second, freely movable end of the annular spring in the circumferential direction of moved away from the first, fixed end, the ring spring expands and gets under tension. When the tension is released, the free end returns to its original position. This effect of the ring spring is used to effect an automatic latching. In the initial position, ie before attaching the attachment to the housing of a power tool, the annular spring is in a de-energized state.
- the annular spring When attaching the attachment to the housing of the power tool, the annular spring is tensioned without further manual operation by the annular spring expands positively, for example by means of a projection on the housing of the power tool.
- the tension of the annular spring is partially released again when the annular spring comes into engagement with the annular groove on the housing.
- the engagement of the annular spring in the annular groove causes a positive fit and prevents inadvertent release of the attachment of the power tool in the axial direction.
- the second, freely movable end of the annular spring is arranged in a rotatably mounted unlocking ring of the locking unit.
- the locking unit comprises a base body, which is provided with fixed engagement means for rotationally fixed engagement with the housing of the power tool.
- On the main body of the annular spring is mounted with its first, fixed end. The second, free end is mounted relative to the base body in the circumferential direction movable and received freely movable in the unlocking ring.
- a freewheel in the form of a parallel to the circumferential direction bent elongated hole is formed in the unlocking ring.
- the unlocking ring is rotatably mounted on the main body in the circumferential direction, wherein the rotation between an initial position and an end position is limited by a respective stop.
- the annular spring In the starting position of the unlocking ring, the annular spring is in tension-free state before attaching the attachment to the housing of the power tool.
- attaching the ring spring is automatically tensioned by expanding, with the free end of the annular spring in the freewheel of the Unlocking ring is movable.
- 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.
- different means may be provided.
- 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 such that the engagement means of attachment and housing engage with each other already during the axial attachment of the attachment to the housing without any other manual operation.
- 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 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 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.
- the attachment 30 comprises an output shaft 32, which on its output side has a recess 34 for receiving an insert tool 36, eg a screwdriver bit.
- the article 30 according to 3 or 4 is composed of a housing 35, a locking unit 40 and a device 70 for adjusting the torque.
- the Drehmomenteinstell device 70 includes a Matterrastkupplung 71, which in the after 3 and 4 illustrated embodiments is a slip clutch.
- the input shaft 31 is provided with a first coupling half 72, the output shaft 32 with a second coupling half 73.
- the Coupling halves 72, 73 are formed in the form of grids.
- the input shaft 31 is received with play in the output shaft 32.
- the output shaft could be received with play in the input shaft (not shown).
- a spring element 74 here in the form of disc springs, acted upon by a spring force.
- a coil spring instead of disc springs and another spring element can be used, for example, a coil spring.
- the spring force of the spring element 74 is transmitted via a pressure plate 75 and a bearing 76 on the second coupling half 73.
- a pressure plate 75 and a bearing 76 on the coupling half 72 is transmitted via a pressure plate 75 and a bearing 76 on the coupling half 72.
- the spring force is adjustable.
- the torque adjusting device 70 has an adjusting element 77 in the form of an outer adjusting ring.
- the actuator 77 is rotatably mounted on the housing 35 and manually operable from the outside by the operator.
- An inner adjusting ring 78 is also rotatable and additionally mounted axially displaceably on the attachment housing 35.
- the inner collar 78 is provided with a thread which engages in a thread on the housing 35.
- the spring force can be infinitely adjustable, or adjusted in stages.
- the inner collar may e.g. be provided with locking grooves, in which a detent spring engages detent (not shown). When turning the adjusting element 77, the detent spring audibly engages in the locking grooves.
- the input shaft 31 is in driving connection with the drive shaft 20 of the power tool 100.
- the driving connection can be achieved in a simple embodiment, for example by a form fit by the drive shaft 20, as in Fig. 1 shown, a polygonal Stirnaus principleung 22, and the input shaft 31 of the attachment 30 on the input side is provided with a complementary to the end recess 22 extension 33 with polygonal cross-section.
- the extension 33 of the input shaft 31 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.
- a locking unit 40 is indicated, which produces a bayonet connection between attachment and hand tool.
- the engagement means 61 cooperate with corresponding engagement means (not shown) on a housing of a hand-held power tool in such a way that a form-locking rotationally secure connection is produced.
- engagement means 62 are provided on the locking unit 40 which, by a simple rotational movement into engagement with corresponding engagement means (not shown) on a housing of a hand tool and thus form a bayonet connection for axial securing of the attachment 30.
- a locking unit 40 is indicated, which is connectable via a thread 63 in cone shape with a housing of a power tool.
- a preferred embodiment of the attachment 30 is characterized by a locking unit 40, which has at least one means 42 for an elastic latching connection.
- the locking unit 40 in the in Fig. 5-8 illustrated embodiment is constructed from a base body 44 which has a central opening 41 for receiving the drive shaft 20 of the power tool 100.
- the main body 44 is provided with engagement means 43 which allow a rotationally secure engagement when attaching the attachment 30 to the housing 10 with corresponding engagement means 13 on the housing 10.
- the mutually associated engagement means 43, 13 are fixedly arranged on the locking unit 40 of the attachment 30 and on the housing 10 of the power tool 100.
- the engagement means 43, 13 are configured so that even during the axial attachment of the attachment 30 to the housing 10 without any other manual operation, the engagement means 43, 13 of attachment 30 and housing 10 engage with each other, whereby a positive connection is made.
- the intervention means 43, 13 transmit the force acting on the top 30 in the circumferential direction forces on the housing 10.
- the engagement means 43, 13 are designed in the illustrated embodiment as toothed rings. Therefore, the attachment 30 can be mounted in virtually any arbitrary angular position relative to the housing 10 of the power tool 100.
- the locking means 42 here is a spring element in the form of a ring spring.
- the annular spring 42 is formed so that it automatically engages when attaching the attachment 30 to the housing 10 with a circumferential annular groove 12 on the housing. If the annular spring 42 is engaged in the annular groove 12, the attachment 30 is locked in the axial direction.
- a first end 45 of the annular spring 42 is fixedly arranged in the main body 44 of the locking unit 40, while a second end 47 of the annular spring 42 is arranged to be movable in the circumferential direction relative to the main body 44 of the locking unit 40. If the second, freely movable end 47 of the annular spring 42 is moved away in the circumferential direction of the first, fixed end 45, the annular spring 42 expands and gets under tension. When the voltage is released, the free end 47 returns to its original position. The elasticity of the annular spring 42 is used to effect an automatic latching. In the starting position, ie before attaching the attachment 30 to the housing 10, the annular spring 42 is in a de-energized state.
- the annular spring 42 When attaching the attachment 30 to the housing 10, the annular spring 42 is tensioned without further manual operation by the annular spring 42 is forcibly guided along the housing 10. In order to facilitate the positive guidance of the annular spring 42 on the housing 10, the surfaces 14 of the teeth of the toothed ring 13 are chamfered in the axial direction. When the annular spring 42 comes into engagement with the annular groove 12 on the housing 10, the tension of the annular spring 42 is partially released again. The engagement of the annular spring 42 in the annular groove 12th causes a positive fit and prevents inadvertent release of the attachment 30 of the power tool 100 in the axial direction.
- the operator For attaching the attachment 30 on the housing 10 of the power tool 100, the operator must thus only the attachment 30 and the power tool 100 in the axial direction together so that the engagement means 43, 13 interlock.
- the locking means 42 engages by itself in the corresponding means, the annular groove 12, on the housing 10 a.
- the annular spring 42 can expand when attaching the attachment 30 to the housing 10, the second end 47 of the annular spring 42 is freely movable in the locking unit 40 is arranged.
- the locking unit 40 further comprises an unlocking ring 46 which is arranged on the base body 44. It is understood as a rear view, the view of the housing in the locked state of the hand tool facing side of the essay and a front view of the view in the locked state of the housing of the power tool opposite side of the essay.
- the second end 47 of the annular spring 42 is arranged to be freely movable in the unlocking ring 46.
- the unlocking ring 46 is provided with an axially continuous freewheel 48 in the form of a parallel to the circumferential direction bent slot.
- the second end 47 of the annular spring 42 is mounted freely movable.
- the annular spring 42 can rise up by the second end 47 can move freely in the freewheel 48. Because of the freewheel 48 for the free end 47 of the annular spring 42 of the unlocking ring 46 does not have to be moved when attaching the essay 30, either automatically or by the operator.
- the annular spring 42 To remove the attachment 30 from the power tool 100, the annular spring 42 must be widened so that it comes out of engagement with the annular groove 12. The expansion of the annular spring 42 is again manually without further Tools or tools.
- the unlocking ring 46 is rotatably mounted on the base body 44 in the circumferential direction, wherein the rotation, as in Fig. 6 shown, between an initial position and an end position by a respective stop 49, 50 is limited to the base body 44.
- the annular spring 42 In the starting position of the unlocking ring 46, the annular spring 42 is in a tension-free state before attaching the attachment 30 to the housing 10 of the power tool 100. If the annular spring 42 engages when fitting to the housing 10 in the annular groove 12, the unlocking ring 46 is still in starting position.
- the unlocking 46 is maximally moved to its final position, which is defined by the formed on the base 44 stop 50 can.
- the free end 47 of the annular spring 42 is received in the unlocking ring 46 so that the unlocking ring 46 by the rotational movement, the free end 47 of the annular spring 42 entrains.
- the annular spring 42 is widened against its spring force until the annular spring 42 with the annular groove 12 is disengaged and can be deducted from the housing 10 of the power tool 100.
- Fig. 8 To illustrate the movement of the free end 47 of the annular spring 42, only the main body 44 and the annular spring 42 is shown and a double arrow 52, which marks the travel of the end 47 of the annular spring 42.
- the annular spring 42 pushes the unlocking ring 46 back into its starting position, defined by the stop 49, by the spring force.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
- Percussive Tools And Related Accessories (AREA)
Description
Die Erfindung betrifft eine Handwerkzeugmaschine nach dem Oberbegriff des Anspruchs 1. So eine Vorrichtung ist aus
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 lösbar anzubringen. Zum lösbaren Anbringen eines Aufsatzes am Gehäuse einer Handwerkzeugmaschine sind unterschiedliche Befestigungsarten bekannt. Herkömmliche Aufsätze werden beispielsweise an einem Spannhals des Handwerkzeugmaschinengehäuses fest gespannt oder mittels einer Bajonettverbindungseinrichtung in axialer Richtung gegen das Gehäuse einer Handwerkzeugmaschine gespannt.In order to make the possible applications for a hand tool, such. To increase a screwdriver or drill, is known from the prior art, releasably attach an attachment to the power tool. For releasably attaching an attachment to the housing of a power tool different attachment types are known. Conventional essays, for example, tightly clamped to a clamping neck of the power tool housing or stretched by means of a bayonet connection device in the axial direction against the housing of a power tool.
Aus dem Stand der Technik sind z.B. Winkelaufsätze bekannt, deren Ausgangswelle in einem Winkel zu der Antriebswelle der Handwerkzeugmaschine steht. Außerdem sind Exzenteraufsätze bekannt, bei denen die Ausgangswelle parallel zu der Antriebswelle der Handwerkzeugmaschine versetzt angeordnet ist. Ist der Aufsatz an der Handwerkzeugmaschine angebracht, stehen Ausgangswelle des Aufsatzes und Antriebswelle der Handwerkzeugmaschine in treibender Verbindung, so dass die Antriebswelle über die Ausgangswelle ein in einer Werkzeugaufnahme des Aufsatzes aufgenommenes Einsatzwerkzeug, z.B. ein Schrauber- oder Bohrerbit, antreibt.From the prior art, e.g. Angle attachments known whose output shaft is at an angle to the drive shaft of the power tool. In addition, eccentric attachments are known in which the output shaft is arranged offset parallel to the drive shaft of the power tool. When the attachment is attached to the hand tool, the output shaft of the attachment and the drive shaft of the hand tool are in driving connection, so that the drive shaft has, via the output shaft, an insertion tool received in a tool holder of the attachment, e.g. a screwdriver or drill bit, drives.
Die Erfindung gemäß Anspruch 1 geht aus von einer Handwerkzeugmaschine und einem Aufsatz, welcher mittels einer Verriegelungseinheit lösbar an einem Gehäuse der Handwerkzeugmaschine anbringbar ist. Der Aufsatz umfasst eine Ausgangswelle, welche mit einer Antriebswelle der Handwerkzeugmaschine drehfest verbindbar ist, sowie eine Werkzeugaufnahme zur Aufnahme eines Einsatzwerkzeuges, z.B. eines Schraubendreherbits.The invention according to claim 1 is based on a hand tool and an attachment, which is releasably attachable by means of a locking unit to a housing of the power tool. The attachment comprises an output shaft, which is rotatably connected to a drive shaft of the power tool, and a tool holder for receiving an insert tool, e.g. a screwdriver bit.
Es wird vorgeschlagen, den Aufsatz mit einer Einrichtung zur Einstellung des Drehmoments auszustatten. Insbesondere ist die Drehmomenteinstell-Einrichtung manuell ohne zusätzliche Hilfsmittel oder Werkzeuge bedienbar. Die Drehmomenteinstell-Einrichtung erlaubt es dem Bediener, an dem Aufsatz das für den jeweiligen Arbeitsvorgang geeignete maximale Drehmoment einzustellen. Bei Erreichen des voreingestellten Drehmoments wird die Ausgangswelle des Aufsatzes von der Antriebswelle getrennt.It is proposed to equip the attachment with a means for adjusting the torque. In particular, the Drehmomenteinstell device is manually operated without additional tools or tools. The Drehmomenteinstell device allows the operator to set the suitable maximum torque for each operation on the attachment. Upon reaching the preset torque, the output shaft of the attachment is disconnected from the drive shaft.
Hierfür weist die Drehmomenteinstell-Einrichtung eine Überrastkupplung mit zwei Kupplungshälften auf, wobei eine Eingangswelle des Aufsatzes mit einer ersten Kupplungshälfte und eine Ausgangswelle mit einer zweiten Kupplungshälfte ausgestattet sind.For this purpose, the Drehmomenteinstell device has a Überrastkupplung with two coupling halves, wherein an input shaft of the attachment are equipped with a first coupling half and an output shaft with a second coupling half.
Zumindest eine der beiden Kupplungshälften ist mit einer Federkraft beaufschlagt, wobei die Federkraft einstellbar ist. Die Federkraft bestimmt das Drehmoment, das von der Eingangswelle auf die Ausgangswelle übertragbar ist. Ist das Drehmoment zu hoch, werden die Kupplungshälften, und damit die Werkzeugaufnahme des Aufsatzes und die Antriebswelle der Handwerkzeugmaschine, voneinander getrennt.At least one of the two coupling halves is acted upon by a spring force, wherein the spring force is adjustable. The spring force determines the torque that is transferable from the input shaft to the output shaft. If the torque is too high, the coupling halves, and thus the tool holder of the attachment and the drive shaft of the power tool, are separated from each other.
Zur Einstellung der Federkraft ist die Drehmomenteinstell-Einrichtung mit einem Stellelement versehen. Das Stellelement ist dabei manuell ohne weitere Hilfsmittel betätigbar. Das Stellelement ist vorzugsweise ein drehbar gelagerter Stellring. Die Einstellung kann stufenlos oder in Stufen erfolgen.To adjust the spring force Drehmomenteinstell the device is provided with an actuator. The actuator is manually operable without further aids. The adjusting element is preferably a rotatably mounted adjusting ring. The setting can be stepless or in steps.
Für die Überrastkupplung sind unterschiedliche Ausführungsformen möglich. Bekannte Überrastkupplungen sind z.B. Klauenkupplung oder Sperrkörperkupplung mit Rollen oder Kugeln als Sperrkörper. Bei diesen Überrastkupplungen werden bei Erreichen des über die Kupplungsfeder voreingestellten Drehmoments die Kupplungshälften über schräge Klauen, Rollen bzw. Kugeln auseinander gedrückt.For the Überrastkupplung different embodiments are possible. Known Überrastkupplungen are eg claw coupling or locking body coupling with rollers or balls as a locking body. In these Überrastkupplungen be upon reaching the pre-set via the clutch spring torque the coupling halves pressed over oblique claws, rollers or balls.
In einer bevorzugten Ausführungsform des erfindungsgemäßen Aufsatzes ist die Überrastkupplung eine reibschlüssige Kupplung, insbesondere eine Rutschkupplung. Die Kupplungshälften sind dabei in Form von Rasterscheiben ausgebildet.In a preferred embodiment of the article according to the invention the Überrastkupplung is a frictional clutch, in particular a slip clutch. The coupling halves are designed in the form of raster discs.
Beim Anbringen des Aufsatzes auf ein Gehäuse einer Handwerkzeugmaschine wird die Antriebswelle der Handwerkzeugmaschine mit der Eingangswelle des Aufsatzes in drehfeste Verbindung gebracht. Hierfür weist die Antriebswelle an ihrem freien Ende eine mehrkantige Ausnehmung auf. An der Eingangswelle 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 Eingangswelle 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.When attaching the attachment to a housing of a power tool, the drive shaft of the power tool is brought into rotationally fixed connection with the input shaft of the attachment. For this purpose, the drive shaft at its free end a polygonal recess. On the other hand, a corresponding polygonal extension is formed on the input shaft of the attachment, which is received in a form-fitting manner by the polygonal recess of the drive shaft. When attaching the essay thus the drive shaft and the input shaft can be assembled without rotation additional manual operation. So that the power tool can also be used without an attachment, the polygonal front recess of the drive shaft is shaped so that it also serves as a receptacle for an insert tool, e.g. Screwdriver bit, can act.
Für das Anbringen des Aufsatzes an der Handwerkzeugmaschine sind unterschiedliche Arten der Befestigung möglich. Aus dem Stand der Technik ist z.B. die lösbare Befestigung mittels einer Bajonettverbindung oder einer Schraubverbindung bekannt. In einer bevorzugten Ausführungsform des erfindungsgemäßen Aufsatzes erfolgt die Befestigung mittels einer Rastverbindung. Dazu umfasst die Verriegelungseinheit des Aufsatzes, mit der der Aufsatz lösbar an einem Gehäuse einer Handwerkzeugmaschine anbringbar ist, zumindest ein Mittel für eine, insbesondere elastische, Rastverbindung. Eine Rastverbindung hat den Vorteil, dass sie einfach handhabbar ist, da kein zusätzliches Werkzeug als Hilfsmittel zum Anbringen oder Lösen des Aufsatzes benötigt wird.For attaching the attachment to the power tool different types of attachment are possible. From the prior art, e.g. the releasable attachment by means of a bayonet connection or a screw connection known. In a preferred embodiment of the attachment according to the invention, the fastening takes place by means of a latching connection. For this purpose, the locking unit of the attachment, with which the attachment is releasably attachable to a housing of a hand tool, comprises at least one means for a, in particular elastic, latching connection. 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, z.B. einer Ausnehmung, 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 ease of use of the locking connection is particularly evident in an embodiment in which the at least one locking means automatically, ie without further manual actuation of the locking means or other means, is executed detent. This means that already at the axial attachment of the attachment to the housing of a power tool engages the at least one latching means in corresponding means, such as a recess on the housing of the power tool detent. The locking connection between the attachment and housing of the power tool is fully automatic, ie without any other action or action of any other means, effective (autolock function). This can be done for example by a resilient latching connection such that a resilient latching means during assembly of 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, such as a recess, is engaged.
Das Rastmittel kann ein separates Bauteil sein, welches an der Verriegelungseinheit des Aufsatzes angebracht ist. Es kann jedoch auch einstückig mit der Verriegelungseinheit ausgeführt sein, indem es an der Verriegelungseinheit angeformt ist. Ist die Verriegelungseinheit beispielsweise aus Kunststoff gefertigt, ist es möglich, eines oder mehrere Rastmittel z.B. in Form von Rasthaken an die Verriegelungseinheit anzuformen.The locking means may be a separate component which is attached to the locking unit of the attachment. However, it may also be designed in one piece with the locking unit, by being integrally formed on the locking unit. If the locking unit is made of plastic, for example, it is possible to use one or more locking means, e.g. in the form of latching hooks to the locking unit.
In einer Ausführungsform des erfindungsgemäßen Aufsatzes ist das zumindest eine Rastmittel ein Federelement, d.h. das Rastmittel ist in sich federnd. Bevorzugt ist das Federelement eine Ringfeder, die als separate Komponente in der Verriegelungseinheit aufgenommen ist.In one embodiment of the attachment according to the invention, the at least one latching means is a spring element, i. the locking means is resilient in itself. Preferably, the spring element is an annular spring, which is accommodated as a separate component in the locking unit.
Dabei ist die Ringfeder so ausgebildet, dass sie beim Ansetzen des Aufsatzes an ein Gehäuse einer Handwerkzeugmaschine mit einer Ringnut, welche an dem Gehäuse der Handwerkzeugmaschine vorgesehen ist, selbsttätig in Eingriff bringbar ist. Ist die Ringfeder mit der Ringnut in Eingriff gebracht, ist der Aufsatz in axialer Richtung gesperrt.In this case, the annular spring is designed so that it can be brought into engagement with the attachment of the attachment to a housing of a hand tool with an annular groove which is provided on the housing of the power tool, automatically engaged. If the annular spring is brought into engagement with the annular groove, the attachment is locked in the axial direction.
Gemäß einer Ausführungsform ist ein erstes Ende der Ringfeder in der Verriegelungseinheit feststehend angeordnet, während ein zweites Ende der Ringfeder in Umfangsrichtung relativ zu der Verriegelungseinheit bewegbar angeordnet ist. Wird das zweite, frei bewegbare Ende der Ringfeder in Umfangsrichtung von dem ersten, feststehenden Ende wegbewegt, weitet sich die Ringfeder auf und gerät unter Spannung. Wird die Spannung gelöst, kehrt das freie Ende wieder in seine Ausgangslage zurück. Dieser Effekt der Ringfeder wird genutzt, um ein selbsttätiges Einrasten zu bewirken. In der Ausgangslage, d.h. vor dem Ansetzen des Aufsatzes an das Gehäuse einer Handwerkzeugmaschine, befindet sich die Ringfeder in spannungsfreiem Zustand. Beim Ansetzen des Aufsatzes an das Gehäuse der Handwerkzeugmaschine wird die Ringfeder ohne weitere manuelle Betätigung gespannt, indem sich die Ringfeder z.B. mittels eines Vorsprungs an dem Gehäuse der Handwerkzeugmaschine zwangsgeführt aufweitet. Die Spannung der Ringfeder wird teilweise wieder gelöst, wenn die Ringfeder in Eingriff mit der Ringnut am Gehäuse gelangt. Der Eingriff der Ringfeder in der Ringnut bewirkt einen sicheren Formschluss und verhindert ein unbeabsichtigtes Lösen des Aufsatzes von der Handwerkzeugmaschine in axialer Richtung.According to one embodiment, a first end of the annular spring is fixedly arranged in the locking unit, while a second end of the annular spring is arranged to be movable in the circumferential direction relative to the locking unit. Is the second, freely movable end of the annular spring in the circumferential direction of moved away from the first, fixed end, the ring spring expands and gets under tension. When the tension is released, the free end returns to its original position. This effect of the ring spring is used to effect an automatic latching. In the initial position, ie before attaching the attachment to the housing of a power tool, the annular spring is in a de-energized state. When attaching the attachment to the housing of the power tool, the annular spring is tensioned without further manual operation by the annular spring expands positively, for example by means of a projection on the housing of the power tool. The tension of the annular spring is partially released again when the annular spring comes into engagement with the annular groove on the housing. The engagement of the annular spring in the annular groove causes a positive fit and prevents inadvertent release of the attachment of the power tool in the axial direction.
Zum Abnehmen des Aufsatzes von der Handwerkzeugmaschine muss der Bediener die Ringfeder aufweiten, damit sie mit der Ringnut außer Eingriff gelangt. Das Aufweiten der Ringfeder kann vorteilhafterweise manuell ohne weitere Hilfsmittel oder Werkzeuge vorgenommen werden. In einer bevorzugten Ausführungsform ist dazu das zweite, frei bewegbare Ende der Ringfeder in einem drehbar gelagerten Entriegelungsring der Verriegelungseinheit angeordnet. Die Verriegelungseinheit umfasst dabei einen Grundkörper, welcher mit feststehenden Eingriffsmitteln zum verdrehfesten Eingriff mit dem Gehäuse der Handwerkzeugmaschine versehen ist. An dem Grundkörper ist die Ringfeder mit ihrem ersten, feststehenden Ende angebracht. Das zweite, freie Ende ist relativ zu dem Grundkörper in Umfangsrichtung bewegbar gelagert und frei bewegbar in dem Entriegelungsring aufgenommen. Um das freie Ende der Ringfeder in dem Entriegelungsring frei bewegbar aufzunehmen, ist in dem Entriegelungsring ein Freilauf in Form eines parallel zur Umfangsrichtung gebogenen Langlochs ausgebildet. Der Entriegelungsring ist auf dem Grundkörper in Umfangsrichtung drehbar gelagert, wobei die Drehbarkeit zwischen einer Ausgangsposition und einer Endposition durch jeweils einen Anschlag begrenzt ist. In der Ausgangsposition des Entriegelungsrings befindet sich die Ringfeder in spannungsfreiem Zustand vor dem Ansetzen des Aufsatzes an das Gehäuse der Handwerkzeugmaschine. Beim Ansetzen wird die Ringfeder selbsttätig gespannt, indem sie sich aufweitet, wobei das freie Ende der Ringfeder in dem Freilauf des Entriegelungsrings bewegbar ist. Wegen des Freilaufs für das freie Ende der Ringfeder muss der Entriegelungsring dabei nicht bewegt werden, weder selbsttätig noch durch den Bediener. Rastet die Ringfeder in die Ringnut ein, befindet sich der Entriegelungsring weiterhin in Ausgangsposition. Zum Abnehmen des Aufsatzes ist nur eine einfache Drehbewegung des Entriegelungsrings relativ zum Grundkörper erforderlich, wobei der Entriegelungsring maximal bis zu seiner Endposition, welche durch einen an dem Grundkörper ausgebildeten Anschlag definiert ist, bewegt werden kann. Das freie Ende der Ringfeder ist in dem Entriegelungsring so aufgenommen, dass der Entriegelungsring durch die Drehbewegung das freie Ende der Ringfeder mitnimmt. Dabei wird die Ringfeder entgegen ihrer Federkraft aufgeweitet, bis die Ringfeder mit der Ringnut außer Eingriff gelangt und von dem Gehäuse der Handwerkzeugmaschine abgezogen werden kann.To remove the attachment from the power tool, the operator must widen the ring spring to disengage it from the ring groove. The expansion of the annular spring can advantageously be carried out manually without further aids or tools. In a preferred embodiment, for this purpose, the second, freely movable end of the annular spring is arranged in a rotatably mounted unlocking ring of the locking unit. The locking unit comprises a base body, which is provided with fixed engagement means for rotationally fixed engagement with the housing of the power tool. On the main body of the annular spring is mounted with its first, fixed end. The second, free end is mounted relative to the base body in the circumferential direction movable and received freely movable in the unlocking ring. In order to receive the free end of the annular spring in the unlocking ring freely movable, a freewheel in the form of a parallel to the circumferential direction bent elongated hole is formed in the unlocking ring. The unlocking ring is rotatably mounted on the main body in the circumferential direction, wherein the rotation between an initial position and an end position is limited by a respective stop. In the starting position of the unlocking ring, the annular spring is in tension-free state before attaching the attachment to the housing of the power tool. When attaching the ring spring is automatically tensioned by expanding, with the free end of the annular spring in the freewheel of the Unlocking ring is movable. Because of the freewheel for the free end of the annular spring unlocking ring does not have to be moved, either automatically or by the operator. If the annular spring engages in the annular groove, the unlocking ring is still in the starting position. To remove the essay, only a simple rotational movement of the unlocking ring relative to the base body is required, wherein the unlocking ring can be moved maximally up to its end position, which is defined by a stop formed on the base body. The free end of the annular spring is received in the unlocking ring so that the unlocking ring entrains the free end of the annular spring by the rotational movement. In this case, the annular spring is widened against its spring force until the annular spring with the annular groove is disengaged and can be deducted from the housing of the power tool.
Das zumindest eine Rastmittel bewirkt zumindest eine axiale Sicherung des Aufsatzes an einem Gehäuse einer Handwerkzeugmaschine. So wird der Aufsatz durch das Rastmittel zumindest in axialer Richtung gehalten. 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. 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.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. 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. 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 such that the engagement means of attachment and housing engage with each other already during the axial attachment of the attachment to the housing without any other manual operation. 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 circumferentially and the received in the axial direction of forces from 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.
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 Antriebswelle und einer Werkzeugaufnahme in perspektivischer Darstellung
- Figur 2
- eine Seitenansicht einer Ausführungsform eines erfindungsgemäßen Aufsatzes mit einer Ausgangswelle und einer Werkzeugaufnahme sowie einer Verriegelungseinheit
- Figur 3
- eine erste Ausführungsform eines erfindungsgemäßen Drehmomentaufsatzes
- Figur 4
- eine zweite Ausführungsform eines erfindungsgemäßen Drehmomentaufsatzes
- Figur 5
- eine Ausführungsform einer Verriegelungseinheit, bestehend aus Grundkörper, Rastmittel und Entriegelungsring, in der Rückansicht
- Figur 6
- die Verriegelungseinheit nach
Fig. 5 in der Vorderansicht - Figur 7
- die Verriegelungseinheit nach
Fig. 5 ohne Entriegelungsring in der Rückansicht - Figur 8
- die Verriegelungseinheit nach
Fig. 5 ohne Entriegelungsring in der Vorderansicht.
- FIG. 1
- a detail 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 an output shaft and a tool holder and a locking unit
- FIG. 3
- a first embodiment of a torque attachment according to the invention
- FIG. 4
- a second embodiment of a torque attachment according to the invention
- FIG. 5
- an embodiment of a locking unit, consisting of the base body, locking means and unlocking, in the rear view
- FIG. 6
- the locking unit after
Fig. 5 in the front view - FIG. 7
- the locking unit after
Fig. 5 without unlocking ring in the rear view - FIG. 8
- the locking unit after
Fig. 5 without unlocking ring in front view.
In
In der Seitenansicht von
In
Die Drehmomenteinstell-Einrichtung 70 umfasst eine Überrastkupplung 71, die in den nach
Zur Einstellung des maximalen Drehmoments ist die Federkraft einstellbar ausgeführt. Dazu weist die Drehmomenteinstell-Einrichtung 70 ein Stellelement 77 in Form eines äußeren Stellringes auf. Das Stellelement 77 ist auf dem Gehäuse 35 drehbar gelagert und von außen von dem Bediener manuell betätigbar. Ein innerer Stellring 78 ist ebenfalls drehbar und zusätzlich axial verschiebbar auf dem Aufsatz-Gehäuse 35 gelagert. Dazu ist der innere Stellring 78 mit einem Gewinde versehen, das in ein Gewinde an dem Gehäuse 35 eingreift. Durch einfaches Drehen des Stellelements 77 wird der innere Stellring 78 axial verschoben und damit die Federkraft variiert. Die Federkraft kann stufenlos einstellbar sein, oder aber in Stufen eingestellt werden. Für eine Einstellbarkeit in Stufen kann der innere Stellring z.B. mit Rastnuten versehen sein, in die eine Rastfeder rastend eingreift (nicht dargestellt). Beim Drehen des Stellelements 77 rastet die Rastfeder hörbar in die Rastnuten ein.To adjust the maximum torque, the spring force is adjustable. For this purpose, the
Wird der Aufsatz 30 an der Handwerkzeugmaschine 100 angebracht, steht die Eingangswelle 31 eingangsseitig in treibender Verbindung mit der Antriebswelle 20 der Handwerkzeugmaschine 100. Die treibende Verbindung 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. In
Eine bevorzugte Ausführungsform des Aufsatzes 30 zeichnet sich durch eine Verriegelungseinheit 40 aus, welche zumindest ein Mittel 42 für eine elastische Rastverbindung aufweist. Die Verriegelungseinheit 40 in der in
In der in
Das Rastmittel 42 ist hierbei ein Federelement in Form einer Ringfeder. Die Ringfeder 42 ist so ausgebildet, dass sie beim Ansetzen des Aufsatzes 30 an das Gehäuse 10 mit einer umlaufenden Ringnut 12 an dem Gehäuse selbsttätig in Eingriff gelangt. Ist die Ringfeder 42 in die Ringnut 12 eingerastet, ist der Aufsatz 30 in axialer Richtung gesperrt.The locking means 42 here is a spring element in the form of a ring spring. The
Ein erstes Ende 45 der Ringfeder 42 ist in dem Grundkörper 44 der Verriegelungseinheit 40 feststehend angeordnet, während ein zweites Ende 47 der Ringfeder 42 in Umfangsrichtung relativ zu dem Grundkörper 44 der Verriegelungseinheit 40 bewegbar angeordnet ist. Wird das zweite, frei bewegbare Ende 47 der Ringfeder 42 in Umfangsrichtung von dem ersten, feststehenden Ende 45 wegbewegt, weitet sich die Ringfeder 42 auf und gerät unter Spannung. Wird die Spannung gelöst, kehrt das freie Ende 47 wieder in seine Ausgangslage zurück. Die Elastizität der Ringfeder 42 wird genutzt, um ein selbsttätiges Einrasten zu bewirken. In der Ausgangslage, d.h. vor dem Ansetzen des Aufsatzes 30 an das Gehäuse 10, befindet sich die Ringfeder 42 in spannungsfreiem Zustand. Beim Ansetzen des Aufsatzes 30 an das Gehäuse 10 wird die Ringfeder 42 ohne weitere manuelle Betätigung gespannt, indem die Ringfeder 42 entlang des Gehäuses 10 zwangsgeführt wird. Um die Zwangsführung der Ringfeder 42 an dem Gehäuse 10 zu erleichtern, sind die Oberflächen 14 der Zähne des Verzahnungskranzes 13 in axialer Richtung abgeschrägt. Wenn die Ringfeder 42 in Eingriff mit der Ringnut 12 am Gehäuse 10 gelangt, wird die Spannung der Ringfeder 42 teilweise wieder gelöst. Der Eingriff der Ringfeder 42 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 Befestigen des Aufsatzes 30 auf dem Gehäuse 10 der Handwerkzeugmaschine 100 muss der Bediener somit lediglich den Aufsatz 30 und die Handwerkzeugmaschine 100 in axialer Richtung so aneinander setzen, dass die Eingriffsmittel 43, 13 ineinander greifen. Das Rastmittel 42 rastet dabei von selbst in das korrespondierende Mittel, die Ringnut 12, an dem Gehäuse 10 ein.For attaching the
Damit sich die Ringfeder 42 beim Ansetzen des Aufsatzes 30 an das Gehäuse 10 aufweiten kann, ist das zweite Ende 47 der Ringfeder 42 frei bewegbar in der Verriegelungseinheit 40 angeordnet. In
Das zweite Ende 47 der Ringfeder 42 ist frei bewegbar in dem Entriegelungsring 46 angeordnet. Dazu ist, wie in
Zum Abnehmen des Aufsatzes 30 von der Handwerkzeugmaschine 100 muss die Ringfeder 42 aufgeweitet werden, damit sie mit der Ringnut 12 außer Eingriff gelangt. Das Aufweiten der Ringfeder 42 erfolgt wiederum manuell ohne weitere Hilfsmittel oder Werkzeuge. Hierfür ist der Entriegelungsring 46 auf dem Grundkörper 44 in Umfangsrichtung drehbar gelagert, wobei die Drehbarkeit, wie in
Zum Abnehmen des Aufsatzes 30 von der Handwerkzeugmaschine 100 ist nur eine einfache manuelle Drehbewegung des Entriegelungsrings 46 relativ zum feststehenden Grundkörper 44 erforderlich, wobei der Entriegelungsring 46 maximal bis zu seiner Endposition, welche durch den an dem Grundkörper 44 ausgebildeten Anschlag 50 definiert ist, bewegt werden kann. Das freie Ende 47 der Ringfeder 42 ist in dem Entriegelungsring 46 so aufgenommen, dass der Entriegelungsring 46 durch die Drehbewegung das freie Ende 47 der Ringfeder 42 mitnimmt. Dabei wird die Ringfeder 42 entgegen ihrer Federkraft aufgeweitet, bis die Ringfeder 42 mit der Ringnut 12 außer Eingriff gelangt und von dem Gehäuse 10 der Handwerkzeugmaschine 100 abgezogen werden kann. In
Nach dem Abnehmen des Aufsatzes 30 drückt die Ringfeder 42 durch die Federkraft den Entriegelungsring 46 wieder in seine Ausgangsposition, definiert durch den Anschlag 49, zurück.After removing the
Claims (15)
- Portable power tool having a housing (10) and a drive shaft (20) and also an attachment (30) comprising a tool receptacle (34) for receiving an application tool (36); a locking unit (40) which is releasably attachable to the housing (10) of the portable power tool (100); and an output shaft (32) which is connectable to a driveshaft (20) of the portable power tool so as to rotate therewith, wherein the attachment (30) has a device (70) for setting the torque and an over-latching clutch (71), characterized in that the drive shaft (20) has at its free end a polygonal recess (22) for receiving an application tool (36), and an input shaft (31) of the attachment (30) has a polygonal extension (33), corresponding to the recess (22), in order to be received in the recess (22) in a formfitting manner.
- Portable power tool according to Claim 1, characterized in that the over-latching clutch (71) is a slip clutch.
- Portable power tool according to either of Claims 1 and 2, characterized in that at least one of the two clutch parts (72; 73) is spring-loaded.
- Portable power tool according to one of the preceding claims, characterized in that the torquesetting device (70) has an adjusting element (77) by way of which the spring force is settable.
- Portable power tool according to Claim 4, characterized in that the adjusting element (77) is a rotatably mounted adjusting ring.
- Portable power tool according to one of the preceding claims, characterized in that the locking unit (40) has at least one means (42) for an, in particular elastic, latching connection.
- Portable power tool according to Claim 6, characterized in that the at least one latching means (42) is configured to latch in place automatically.
- Portable power tool according to either of Claims 6 and 7, characterized in that the at least one latching means (42) is a spring element which, when the attachment (30) is positioned on a housing (10) of a portable power tool, can be brought into engagement with corresponding means (12) on the housing (10).
- Portable power tool according to Claim 8, characterized in that a first end (45) of the spring element (42) is arranged in a stationary manner in the locking unit (40), and a second end (47) of the spring element (42) is arranged so as to be movable in the circumferential direction relative to the locking unit (40).
- Portable power tool according to Claim 9, characterized in that the second end (47) of the spring element (42) is arranged in a rotatably mounted unlocking ring (46) of the locking unit (40).
- Portable power tool according to one of the preceding claims, characterized in that the locking unit (40) has engagement means (43) for rotationally fixed engagement with a housing (10) of a portable power tool.
- Portable power tool according to Claim 11, characterized in that the engagement means (43) are configured as a toothed ring.
- Portable power tool according to one of Claims 6 to 12, characterized in that the latching means (42) can be brought into engagement with an annular groove (12) on the housing (10) when the attachment (30) is positioned on the housing (10).
- Portable power tool according to one of Claims 9 to 13, characterized in that the locking unit (40) has a main body (44) having a recess (51) for receiving the second end (47) of the spring element (42).
- Portable power tool according to one of Claims 10 to 14, characterized in that the unlocking ring (46) has an axially continuous freewheel (48) for receiving the second end (47) of the spring element (42).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102006057928A DE102006057928A1 (en) | 2006-12-08 | 2006-12-08 | Attachment for a hand tool |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1930125A1 EP1930125A1 (en) | 2008-06-11 |
EP1930125B1 true EP1930125B1 (en) | 2013-12-25 |
Family
ID=39185972
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP07118573.0A Active EP1930125B1 (en) | 2006-12-08 | 2007-10-16 | Attachment for a hand tool |
Country Status (4)
Country | Link |
---|---|
US (1) | US7793572B2 (en) |
EP (1) | EP1930125B1 (en) |
CN (1) | CN101195216B (en) |
DE (1) | DE102006057928A1 (en) |
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DE202016104002U1 (en) | 2016-07-22 | 2016-08-03 | Kompernaß Handelsgesellschaft mbH | Combination of a hand tool and an attachment |
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2006
- 2006-12-08 DE DE102006057928A patent/DE102006057928A1/en not_active Withdrawn
-
2007
- 2007-10-16 EP EP07118573.0A patent/EP1930125B1/en active Active
- 2007-11-27 US US11/945,796 patent/US7793572B2/en active Active
- 2007-12-07 CN CN200710198824.4A patent/CN101195216B/en active Active
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE202016104002U1 (en) | 2016-07-22 | 2016-08-03 | Kompernaß Handelsgesellschaft mbH | Combination of a hand tool and an attachment |
Also Published As
Publication number | Publication date |
---|---|
US20080136125A1 (en) | 2008-06-12 |
EP1930125A1 (en) | 2008-06-11 |
CN101195216B (en) | 2015-07-29 |
DE102006057928A1 (en) | 2008-06-12 |
CN101195216A (en) | 2008-06-11 |
US7793572B2 (en) | 2010-09-14 |
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