EP1930125B1 - Chapiteau pour une machine-outil manuelle - Google Patents

Chapiteau pour une machine-outil manuelle Download PDF

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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
Application number
EP07118573.0A
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German (de)
English (en)
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EP1930125A1 (fr
Inventor
Daniel Hirt
Juergen Gairing
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1930125A1 publication Critical patent/EP1930125A1/fr
Application granted granted Critical
Publication of EP1930125B1 publication Critical patent/EP1930125B1/fr
Active legal-status Critical Current
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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)

Claims (15)

  1. Machine-outil manuelle comprenant un boîtier (10) et un arbre d'entraînement (20) ainsi qu'un élément rapporté (30), comportant un logement d'outil (34) pour la réception d'un outil d'insertion (36) ; une unité de verrouillage (40) qui peut être fixée de manière amovible sur le boîtier (10) de la machine-outil manuelle (100) ; et un arbre de sortie (32) qui peut être relié de manière solidaire en rotation à un arbre d'entraînement (20) de la machine-outil manuelle, l'élément rapporté (30) comprenant un dispositif (70) de réglage du couple et un embrayage de surblocage (71), caractérisée en ce que l'arbre d'entraînement (20) comprend à son extrémité libre un évidement polygonal (22) pour la réception d'un outil d'insertion (36), et un arbre d'entrée (31) de l'élément rapporté (30) comprend un prolongement polygonal (33) correspondant à l'évidement (22) en vue d'une réception par engagement par complémentarité de formes dans l'évidement (22).
  2. Machine-outil manuelle selon la revendication 1, caractérisée en ce que l'embrayage de surblocage (71) est un embrayage à glissement.
  3. Machine-outil manuelle selon la revendication 1 ou 2, caractérisée en ce qu'au moins l'une des deux moitiés d'embrayage (72 ; 73) est sollicitée par une force de ressort.
  4. Machine-outil manuelle selon l'une quelconque des revendications précédentes, caractérisée en ce que le dispositif de réglage de couple (70) comprend un élément de réglage (77) à l'aide duquel la force de ressort peut être réglée.
  5. Machine-outil manuelle selon la revendication 4, caractérisée en ce que l'élément de réglage (77) est une bague de réglage montée à rotation.
  6. Machine-outil manuelle selon l'une quelconque des revendications précédentes, caractérisée en ce que l'unité de verrouillage (40) comprend au moins un moyen (42) pour une liaison par encliquetage en particulier élastique.
  7. Machine-outil manuelle selon la revendication 6, caractérisée en ce que l'au moins un moyen d'encliquetage (42) est réalisé de manière à pouvoir s'encliqueter automatiquement.
  8. Machine-outil manuelle selon la revendication 6 ou 7, caractérisée en ce que l'au moins un moyen d'encliquetage (42) est un élément ressort qui peut être amené en prise avec des moyens correspondants (12) sur le boîtier (10) lors de la mise en place de l'élément rapporté (30) sur un boîtier (10) d'une machine-outil manuelle.
  9. Machine-outil manuelle selon la revendication 8, caractérisée en ce qu'une première extrémité (45) de l'élément ressort (42) est disposée de manière fixe dans l'unité de verrouillage (40), et une deuxième extrémité (47) de l'élément ressort (42) est disposée de manière mobile par rapport à l'unité de verrouillage (40) dans la direction périphérique.
  10. Machine-outil manuelle selon la revendication 9, caractérisée en ce que la deuxième extrémité (47) de l'élément ressort (42) est disposée dans une bague de déverrouillage (46) montée à rotation de l'unité de verrouillage (40).
  11. Machine-outil manuelle selon l'une quelconque des revendications précédentes, caractérisée en ce que l'unité de verrouillage (40) comprend des moyens d'engagement (43) pour l'engagement solidaire en rotation avec un boîtier (10) d'une machine-outil manuelle.
  12. Machine-outil manuelle selon la revendication 11, caractérisée en ce que les moyens d'engagement (43) sont réalisés sous forme de couronne dentée.
  13. Machine-outil manuelle selon l'une quelconque des revendications 6 à 12, caractérisée en ce que le moyen d'encliquetage (42) peut être amené en prise avec une rainure annulaire (12) sur le boîtier (10) lors de la mise en place de l'élément rapporté (30) sur le boîtier (10).
  14. Machine-outil manuelle selon l'une quelconque des revendications 9 à 13, caractérisée en ce que l'unité de verrouillage (40) comprend un corps de base (44) pourvu d'un évidement (51) pour la réception de la deuxième extrémité (47) de l'élément ressort (42).
  15. Machine-outil manuelle selon l'une quelconque des revendications 10 à 14, caractérisée en ce que la bague de déverrouillage (46) comprend une roue libre axialement traversante (48) pour la réception de la deuxième extrémité (47) de l'élément ressort (42).
EP07118573.0A 2006-12-08 2007-10-16 Chapiteau pour une machine-outil manuelle Active EP1930125B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102006057928A DE102006057928A1 (de) 2006-12-08 2006-12-08 Aufsatz für eine Handwerkzeugmaschine

Publications (2)

Publication Number Publication Date
EP1930125A1 EP1930125A1 (fr) 2008-06-11
EP1930125B1 true EP1930125B1 (fr) 2013-12-25

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EP07118573.0A Active EP1930125B1 (fr) 2006-12-08 2007-10-16 Chapiteau pour une machine-outil manuelle

Country Status (4)

Country Link
US (1) US7793572B2 (fr)
EP (1) EP1930125B1 (fr)
CN (1) CN101195216B (fr)
DE (1) DE102006057928A1 (fr)

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DE202016104002U1 (de) 2016-07-22 2016-08-03 Kompernaß Handelsgesellschaft mbH Kombination aus einer Handwerkzeugmaschine und einem Aufsatz

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US20080136125A1 (en) 2008-06-12
EP1930125A1 (fr) 2008-06-11
CN101195216B (zh) 2015-07-29
DE102006057928A1 (de) 2008-06-12
CN101195216A (zh) 2008-06-11
US7793572B2 (en) 2010-09-14

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