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EP2262619A1 - Poignée supplémentaire et machine-outil portative - Google Patents

Poignée supplémentaire et machine-outil portative

Info

Publication number
EP2262619A1
EP2262619A1 EP08873143A EP08873143A EP2262619A1 EP 2262619 A1 EP2262619 A1 EP 2262619A1 EP 08873143 A EP08873143 A EP 08873143A EP 08873143 A EP08873143 A EP 08873143A EP 2262619 A1 EP2262619 A1 EP 2262619A1
Authority
EP
European Patent Office
Prior art keywords
auxiliary handle
spring element
power tool
hand tool
recess
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.)
Withdrawn
Application number
EP08873143A
Other languages
German (de)
English (en)
Inventor
Robert Simm
Thomas Bannwart
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 EP2262619A1 publication Critical patent/EP2262619A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
    • B25F5/02—Construction of casings, bodies or handles
    • B25F5/025—Construction of casings, bodies or handles with torque reaction bars for rotary tools
    • B25F5/026—Construction of casings, bodies or handles with torque reaction bars for rotary tools in the form of an auxiliary handle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D17/00—Details of, or accessories for, portable power-driven percussive tools
    • B25D17/04—Handles; Handle mountings
    • 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
    • B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
    • B25F5/003—Stops for limiting depth in rotary hand tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2250/00—General details of portable percussive tools; Components used in portable percussive tools
    • B25D2250/371—Use of springs
    • B25D2250/381—Leaf springs

Definitions

  • the invention relates to an auxiliary handle for a hand tool according to the preamble of claim 1 and a hand tool according to claim 9.
  • additional handles are known, which can be fixed with the aid of at least one fastening means as needed on the hand tool, usually on a spindle neck of the power tool.
  • the fastening means comprise a clamping ring with which a frictional connection between the auxiliary handle and the power tool can be produced.
  • the auxiliary handle 1 comprises fastening means 2, with which a positive connection in the axial direction of a hand tool machine 3 can be produced.
  • the fastening means 2 comprise a rib-shaped element 4, which can be received in a circumferential groove 5 in a spindle neck 6 of the power tool 3.
  • a disadvantage of the auxiliary handle 1 is that the operator can not always be sure that the rip- pen-shaped element 4 is actually received in the circumferential groove 5. If the rigid, rib-shaped element 4, as shown in Fig.
  • the invention has for its object to propose a handle which can be secured against unintentional release of the power tool. Furthermore, the task consists of proposing a correspondingly optimized hand tool machine with additional handle.
  • the axial direction in which the form-locking connection acts with the working direction, ie in a drilling machine with the drilling direction or drilling axis, coincides. So that the operator can be sure that the axial positive connection between the auxiliary handle and the power tool is made, is provided in a trained according to the concept of the invention additional handle that at least one attachment means of the auxiliary handle makes the positive connection to the power tool by means of a spring element , which is receivable in a recess of the power tool.
  • the recess is preferably a groove extending in the circumferential direction, a groove arranged on the outside of the hand-held power tool, preferably on the outside of a spindle neck of the hand-held power tool.
  • a fastening means with a latchable in a recess of the power tool spring element has the advantage that the auxiliary handle can initially be arranged on the hand tool, that the spring element is not locked in the associated recess, the spring element thus arranged with axial distance to the recess is.
  • the spring element By moving the auxiliary handle in the axial direction, preferably after a previous prestressing of the spring element, the spring element automatically engages in the recess of the handheld power tool, which is preferably indicated to the operator by a clicking sound, which is preferably generated by the fact that the spring element strikes the recess base. If the operator hears a click, it knows that the spring element is received in the recess.
  • the spring element at an angle, in particular perpendicular, to the axial direction in which the positive connection acts relative to the power tool adjustable and / or deformable.
  • this can adapt to the peripheral contour of the power tool / cling.
  • An adjustment of the spring element relative to the power tool can be realized that the power tool is moved by operating the clamping device in the direction of the spring element.
  • a frictional connection between the auxiliary handle and the power tool is feasible.
  • a receptacle of the additional handle which is penetrated by the hand tool machine, in particular a spindle neck of the handheld power tool, is formed in two parts, wherein the two, part-circular sections of the receptacle with the help of a Screw connection with the power tool, especially with the spindle neck are clamped.
  • a spindle arranged in the handle is provided, which is rotatable, for example by turning a handle portion and thereby adjusts two clamping parts relative to each other.
  • a contact surface is provided which is pressed against the outer periphery of the power tool, in particular the spindle neck.
  • such contact surfaces are provided on both axial sides of the spring element.
  • the spring element In order to produce a secure frictional connection between the auxiliary handle and a hand tool even when the hand tool has no matching recess for receiving the spring element or when the auxiliary handle to be set on the hand tool, that the spring element is arranged with axial distance to the recess , it is advantageous if the spring element can spring back so far that it does not project beyond the abutment surfaces provided in the axial direction adjacent to the spring element in the direction of the hand tool, so that the abutment surfaces securely on the outer circumference of the hand tool, especially on the spindle neck. can lie and thereby the hand tool is clamped.
  • Such a trained auxiliary handle is therefore also usable with hand tool machines, in which a recess for receiving the spring element is provided.
  • An alternative possibility for producing a frictional connection is that the hand tool, in particular a spindle neck of the hand tool, in a, in particular circular, contours
  • the recessed cross section for producing a clamping connection or a frictional connection is reduced in that the upper component in the direction of a (lower) component, more precisely in an upwardly open recess in the lower component , is moved into.
  • auxiliary handle wherein the spring element is formed such that with this a multi-point support, preferably a three-point support on the power tool, preferably within the recess of the power tool can be realized as a support at a plurality of circumferentially spaced areas ,
  • an axial release of the auxiliary handle of the machine tool can be realized in that the spring element is designed as a wire bending spring.
  • the spring element is designed as a wire bending spring.
  • a sufficient assurance can already be realized with a wire diameter of about 1.2 mm.
  • Preferably designed as a wire spring spring element extends transversely to the axial direction in which the positive connection acts.
  • the spring element can be sufficiently supported in the axial direction of the auxiliary handle, it is preferred to receive the spring element in a slot of the auxiliary handle, wherein the slot is dominated by the spring element in the direction of the power tool.
  • the slot passes through a clamping device for adjusting the spring element of the direction of the power tool transverse to the axial direction in which the positive connection acts.
  • At least one further fastening means is provided with which a form-locking connection between the auxiliary handle and the power tool can be produced in a circumferential direction, ie preferably in a direction running around the axial direction.
  • a form-locking connection between the auxiliary handle and the power tool can be produced in a circumferential direction, ie preferably in a direction running around the axial direction.
  • an extension can be provided on the additional handle, which cooperates with a recess on the hand tool machine preventing rotation.
  • a plurality, preferably evenly distributed in the circumferential direction, recesses and / or extensions are provided.
  • the invention also leads to a hand tool with a previously described additional handle.
  • the hand tool machine has a recess which is designed such that it can cooperate with the spring element, receiving the spring element, so that with the help of the spring element acting in the axial direction positive connection to the hand tool machine manufactures.
  • bar is to secure the auxiliary handle against unintentional release in the axial direction of the power tool.
  • a frictional connection can be made in addition to the axial securing between the auxiliary handle and the power tool.
  • FIG. 2 shows a possible embodiment of a spindle neck of the power tool according to FIG. 1, FIG.
  • FIG. 4 is a perspective view of an auxiliary handle
  • FIG. 5 shows a longitudinal sectional view of the auxiliary handle according to FIG. 4, FIG.
  • FIG. 6 shows a possible, different embodiment of a spring element designed to the embodiment according to FIG. 3, and FIG Fig. 7: an additional handle according to the in-house state of the art
  • FIG. 8 shows a partial section of a further exemplary embodiment of an additional handle according to the invention
  • Fig. 1 designed as a drilling and / or percussion drill power tool 20 is shown.
  • the hand tool 20 includes a tool holder 21, which can be driven by a drive unit, not shown. Further, the hand tool 20 comprises a remote from the tool holder 21 side of the power tool 20 arranged main handle 22. Along a working axis 23 (here drilling axis) in the axial direction 24 in front of the tool holder 21, an additional handle 25 is arranged.
  • the additional handle 25 is located on a spindle neck 26 of the hand tool 20.
  • the auxiliary handle 25 has a lower grip plane 27 in the plane of the drawing and an attachment section 28 arranged above it.
  • the attachment section 28 has a hand-held power tool receiver 29, which is penetrated in the axial direction 24 by the hand-held power tool 20, here by the spindle neck 26.
  • the portable power tool holder 29 is frictionally connected to the spindle neck 26.
  • FIG. 2 shows a section of the handheld power tool 20 shown in FIG. 1 with its spindle neck 26 for receiving the auxiliary handle 25 in a view obliquely from the front.
  • the spindle neck 26 has a cylindrical shape and is aligned along the working axis 23 of the power tool 20.
  • a formed as in a circumferential direction 30 groove (circumferential groove) recess 31 is formed, which is designed for direct interaction with a later to be explained yet spring element.
  • the auxiliary handle 29 can be secured against unintentional release in the axial direction 24 along the working axis 23.
  • four web-shaped elevations 32 are provided at the rear end of the spindle neck 26, which are distributed in the circumferential direction 30 around the spindle neck 26.
  • the four web-shaped elevations 32 are arranged uniformly in circumferential direction 30, ie at a distance of 90 ° from one another and are formed integrally with the spindle neck 26.
  • the four web-shaped elevations 32 are arranged on an edge region 33 of the spindle neck 26 facing away from the tool holder 21, which adjoins a housing 34 of the handheld power tool 20.
  • the web-shaped elevations 32 extending in the radial direction serve for interacting with fastening means, which will be explained later, for achieving a form-locking connection in the peripheral direction 30 between the auxiliary handle 25 and the handheld power tool 20.
  • FIG. 3 shows a possible embodiment of an additional handle 25 is shown.
  • the attachment portion 28 with the portable power tool holder 29 is shown in FIG Embodiment formed in two parts. It comprises an upper component 35 with a circular inner contour 36 (actual receiving opening for the spindle neck 26).
  • the upper component 35 is received in a recess 37 of a lower component 38.
  • the grip portion 27 (see Fig. 1) for gripping the auxiliary handle 25 is formed on the lower portion of the lower component 38 (not shown).
  • the grip portion 27 is penetrated by a threaded spindle 39, which engages in a threaded nut 40, which in turn is rotationally fixed in the upper component 35.
  • the upper component 35 By rotating the threaded spindle 39, which is fixed in a rotationally fixed manner, for example, to a lower, separate section of the grip section 27, the upper component 35 can be adjusted perpendicular to the working axis 23 relative to the lower component 38 and relative to the handle section (not shown). As a result, the free cross section 41 (receiving cross section) enclosed by the portable power tool holder 29 can be changed, as a result of which a frictionally engaged connection between the auxiliary handle 25 and the handheld power tool 20 can be produced.
  • the auxiliary handle 25 comprises a fastening means 42 for producing a positive connection in the drawn in Figs. 1 and 2 axial direction 24 between the auxiliary handle 25 and the power tool 20.
  • the fastening means 42 comprises a wire bending spring with a diameter of 1.2 mm formed spring element 43, which is arranged in a plane which is vertically enforced by the working axis 23 and the axial direction 24.
  • the spring element 43 is locked with its free ends 44 behind in each case a projection 45 of the lower component 38.
  • the spring element 43 is received in a slot 46 (gap), which is transverse to the axial direction 24th or to the working axis 23 extends.
  • the slit 46 is formed jointly by the upper component 35 and the lower component 38.
  • the spindle neck 26 accommodated in the machine tool holder 29 is moved in the direction of the spring element 43, which thereby with a force F is applied.
  • the force arrows F point to three areas of the spring element 43 with which the spring element 43 realizes a three-point support on the craft machine 20. If the auxiliary handle 25 is fixed to the handheld power tool 20 such that the spring element 43 can deflect into the groove-shaped recess 31 perpendicular to the working axis 23, the auxiliary handle 25 is secured against axial displacement in the axial direction 24 on the handheld power tool 20.
  • the spring element 43 can spring into the recess 31 during axial displacement of the auxiliary handle 25 to the power tool 20, as soon as the spring element 43 is located at the axial height of the recess 31. This engagement is signaled to the operator by a click.
  • the spring element 43 has sufficient spring play in the direction of the handle portion 27 to spring back, such that it is axially adjacent to the spring element Ment 43 provided contact surface 47 for direct contact with the power tool 20 not surmounted in the direction of the power tool 20 to thereby guarantee a secure frictional grip of the auxiliary handle 25 to the power tool 20 can.
  • the frictional connection between the auxiliary handle 25 and the hand tool 20 can be ensured in other ways, for example by the hand machine tool holder 29 is slotted and facing each other free ends of the power tool holder 29, for example, by means of a laterally mounted screw, are moved towards each other. It is essential that means for changing the free cross section 41 are provided.
  • the spring element 43 is formed symmetrically with respect to a mirror plane, in which the working axis 23 is accommodated and which extends in the longitudinal direction of the handheld power tool 20. In a middle region, the spring element 43 has a W-shape and then passes on both sides in each case a transverse section, which then merges in each case via an oblique portion in each case in the curved, latched free end 44.
  • the upper component 35 can be seen, which relative to the lower component 38 by means of the in Fig. 5 GE. showed threaded spindle 39 is adjustable.
  • the slot 46 in which the spring element 43 is received.
  • the spring element 43 is formed as shown in Fig. 6. This is also a spring element 43 designed as a wire bending spring, which is formed symmetrically with respect to a plane of symmetry. With the spring element 43 shown, a two-point support can be realized on two inclined sections. In a central portion, the spring element 43 has an arc portion facing away from the power tool 20 (approximately V-shape), which merges on both sides in an S-shaped portion, on each of which a free end 44 is formed.
  • a peripheral bead 48 can be seen on the upper component 35, with which the upper component 35 is guided in a corresponding guide groove 49 on the lower component 38.
  • a further fastening means 50 for producing a positive connection with the hand tool 20 in the circumferential direction 30 is provided.
  • the fastening means 50 a plurality of evenly distributed circumferentially arranged edge-side recesses 52, which are designed to cooperate with the elevations 32 on the power tool 20. Because recesses 52 are provided on both axial end faces of the hand-held power tool receiver 29, the auxiliary handle 25 can be connected in a form-fitting manner to the hand-held power tool 20 in two assembly directions in the circumferential direction.
  • FIG. 8 shows a partial section of a further exemplary embodiment of an auxiliary handle 25 according to the invention.
  • the same reference numerals as in the embodiments described above are given the same or similar features.
  • the attachment area 28 of the additional handle 25 according to the invention with the hand tool machine housing 29 is formed in one piece in this exemplary embodiment.
  • the embodiment according to FIG. 8 differs from the already known embodiments of the auxiliary handle 25 according to the invention by a movable closing element 54.
  • the movable closing element 54 is arranged on the end region of a spring element 43 'facing the working axis 23.
  • the spring element 43 ' is preferably designed as a folded sheet or strip spring.
  • coil springs and / or other pressure elements for example made of elastomers or other elastic materials, as the spring element 43 '.
  • the closing element 54 is arranged in the present example, in particular along a direction of movement 60 axially displaceable in the auxiliary handle 25.
  • the closing element 54 is latched by the spring element 43 'in the recess 31 of the hand tool 20.
  • the spring element 43 ' causes an indirectly positive connection between the auxiliary handle 25 and the hand tool 20.
  • directly positive fit is understood in particular that for the production of the positive connection between the closing element 54 of the auxiliary handle 25 and the power tool 20, the spring element 43 must contribute the necessary force component.
  • the spring element 43 ' is arranged on a carrier element 58 on a side facing away from the closing element 54.
  • the support member 58 is provided between the spring element 43 'and the spring element 43' facing the end of the threaded spindle 39.
  • the carrier element 58 decouples the spring element 43 'from a rotational movement of the threaded spindle 39 which occurs during an adjustment of the auxiliary handle 25.
  • the carrier element may possibly 58 be waived.
  • the closing element 54 and the spring element 43 ' are received in a guide element 56.
  • the guide element 56 is also accommodated in the present example along the direction of movement 60 slidably in the lower component 38 of the auxiliary handle 35 and arranged on the support member 58.
  • At the working axis 23 facing ends of the guide member 56 is provided in the embodiment of FIG. 8, each with a locking wing. If the threaded spindle 39 is closed in the direction of the working axis 23, then these locking wings support the locking action of the closing element 54.
  • this effect can be dispensed with by omitting the locking wings and / or by not executing the guide element 56 in a displaceable manner and / or is not arranged on the carrier element 58.
  • Further advantageous embodiments of an additional handle 25 according to the invention can be achieved by combinations of the features described above.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Portable Power Tools In General (AREA)
  • Percussive Tools And Related Accessories (AREA)

Abstract

La présente invention concerne une poignée supplémentaire (25) comportant au moins un moyen de fixation (42) permettant de fixer la poignée supplémentaire (25) sur une machine-outil portative (20). Selon l’invention, il est prévu que le moyen de fixation (50) soit conçu pour permettre d’obtenir un assemblage par complémentarité de formes direct ou indirect entre la poignée supplémentaire (25) et la machine-outil portative (20), par enclenchement d’un ressort (43) du moyen de fixation (42) dans un creux (31) de la machine-outil portative (20). L’invention concerne, par ailleurs, une machine-outil portative (20).
EP08873143A 2008-03-05 2008-11-17 Poignée supplémentaire et machine-outil portative Withdrawn EP2262619A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008000516A DE102008000516A1 (de) 2008-03-05 2008-03-05 Zusatzhandgriff sowie Handwerkzeugmaschine
PCT/EP2008/065673 WO2009109247A1 (fr) 2008-03-05 2008-11-17 Poignée supplémentaire et machine-outil portative

Publications (1)

Publication Number Publication Date
EP2262619A1 true EP2262619A1 (fr) 2010-12-22

Family

ID=40196506

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08873143A Withdrawn EP2262619A1 (fr) 2008-03-05 2008-11-17 Poignée supplémentaire et machine-outil portative

Country Status (5)

Country Link
US (1) US20110011609A1 (fr)
EP (1) EP2262619A1 (fr)
CN (1) CN101959652A (fr)
DE (1) DE102008000516A1 (fr)
WO (1) WO2009109247A1 (fr)

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* Cited by examiner, † Cited by third party
Title
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US20110011609A1 (en) 2011-01-20
CN101959652A (zh) 2011-01-26
WO2009109247A1 (fr) 2009-09-11

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