EP2468461A2 - Poignée supplémentaire, machine-outil manuelle, système - Google Patents

Poignée supplémentaire, machine-outil manuelle, système Download PDF

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Publication number
EP2468461A2
EP2468461A2 EP11190211A EP11190211A EP2468461A2 EP 2468461 A2 EP2468461 A2 EP 2468461A2 EP 11190211 A EP11190211 A EP 11190211A EP 11190211 A EP11190211 A EP 11190211A EP 2468461 A2 EP2468461 A2 EP 2468461A2
Authority
EP
European Patent Office
Prior art keywords
handle
guide
coupling part
coupling
fastening element
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Withdrawn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
EP11190211A
Other languages
German (de)
English (en)
Other versions
EP2468461A3 (fr
Inventor
Constantin Von Saucken
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.)
Hilti AG
Original Assignee
Hilti AG
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 Hilti AG filed Critical Hilti AG
Publication of EP2468461A2 publication Critical patent/EP2468461A2/fr
Publication of EP2468461A3 publication Critical patent/EP2468461A3/fr
Withdrawn legal-status Critical Current

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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

Definitions

  • the invention also relates to a hand tool according to the preamble of claim 15.
  • the invention further relates to a system of hand tool and auxiliary handle, as it is arranged for example in a tool box or the like.
  • Almost all hand-held machine tools for example in the form of a power tool or the like, have at least one connection option for an additional handle of the type mentioned.
  • An additional handle should facilitate the guidance of a hand tool and / or intercept any torques occurring.
  • An additional handle is thus an approval-relevant component.
  • An additional handle of the applicant is, for example, in DE 37 31 059 or EP 2 191 941 A2 discloses according to the aforementioned type.
  • an attachment of the auxiliary handle by means of a screw connection between the fastener and the handle.
  • the fastener is designed in the aforementioned applications as a strap or a clamp and engages upon tightening the screw frictionally engages the neck of the machine tool.
  • auxiliary handle is still in need of improvement. It has been found that the operation of the screw over the handle can be comparatively time-consuming, since the handle must be relatively frequently rotated, as for releasing or exciting operation on the one hand On the other hand, however, an increased force-enhancing effect of the screw connection is actually required only for relatively few final rotations. This has the consequence that most rotations of a handle for actuating the screw connection take place practically without counter force and the user receives no feedback about a torque necessary for frictionally locking. In particular, a user receives no feedback about an actually sufficient and the safety regulations sufficient torque when exciting setting the auxiliary handle.
  • the invention begins, the object of which is to provide an auxiliary handle, a hand tool and a system, wherein a comparison with the prior art improved attachment of the auxiliary handle to a hand tool is made possible.
  • the attachment of the auxiliary handle should be designed comparatively simple.
  • an additional handle should be relatively securely attachable to the power tool.
  • the attachment of the auxiliary handle to a hand tool should be predetermined so that it meets the safety requirements and in particular, this circumstance should be recognizable to the user.
  • auxiliary handle of the type mentioned, in which according to the invention the features of the characterizing part of claim 1 are provided.
  • the invention is based on the consideration that a screw connection allows a basically secure attachment of an additional handle to a hand tool, but with regard to the handling, the possibilities of a screw connection are limited.
  • the invention has recognized that, in departure from the concept of a screw connection, it is possible to realize a locking coupling connecting the handle and the fastening element, which meets the different requirements when handling the auxiliary handle.
  • the invention has recognized that a first and second coupling part of the closure coupling should be designed so that in any case there is the possibility of the closure coupling (a) time-effective, (b) safe and (c) for the user recognizable to solve or to close is.
  • the invention has recognized that this is best realized by means of a first and second coupling part, which are arranged axially interlocking with each other along the coupling shaft.
  • the first and second coupling part are arranged to form a bayonet closure for the realization of the closure coupling to each other.
  • the bayonet closure between the first and second coupling part according to the invention comprises a movable engagement element engaging in a guide.
  • the guide can be arranged on the first coupling part, in which case the engagement element is arranged on the second coupling part.
  • the guide may alternatively be arranged on the second coupling element, in which case the engagement element is arranged on the first coupling part.
  • An engagement element may be formed, for example in the form of a pin, a web, a pin, a knob or the like elevation.
  • the guide may be formed in particular in the form of a guide slot, a guide groove or a guide flank or the like.
  • a bayonet closure is to be understood as meaning any type of closable slide guide, in which an aforementioned survey engages in the guide or rests against a guide flank to allow a positively driven movement of the survey and the guide relative to each other.
  • the invention has recognized that the positively driven movement predefined over a course of the slotted guide can be used to advantage in order to achieve the movement of the engagement element between a first point of the guide and a second point of the guide as above (a), (b) (c) specify the advantages of a coupling device.
  • the fastening element is adjusted between the attaching position and the releasing position.
  • a bayonet closure is advantageously suitable for effectively, safely and recognizably releasing the user from loosening or attaching the fastening element to the connection region of the hand-held power tool while rotating the handle about the closure coupling axis.
  • a bayonet lock can be locked by the user turning the handle only within a fraction of a full, e.g. half a turn completely closed or fully opened.
  • the fastening element can be completely fastened or loosened at the connection region of the handheld power tool.
  • the user receives due to the positively guided movement of the first and second coupling part relative to each other a recognizable feedback on the resistance of the positively driven movement, in particular on the fact that the bayonet is fully open or fully closed.
  • the handle is a handle extending substantially along a single handle axis.
  • the concept of the invention proves to be particularly advantageous in the context of training in accordance with the handle axis and coupling shaft.
  • the rotation of the handle can be transferred so particularly advantageous to the coupling.
  • the first coupling part is attached directly to the handle and / or the second coupling part is fastened directly to the fastening element.
  • This allows an advantageous direct power transmission from a coupling part to a handle or fastener.
  • a power transmission between the coupling part and handle or fastener has proven when the first coupling part is integrally formed with the handle and / or the second coupling part is formed integrally with the fastening element.
  • connecting force-transmitting parts may also be provided fixedly or movably between the coupling part and the handle or fastening element.
  • the first coupling part in the form of a shaft and the second coupling part may be formed in the form of a sleeve, wherein the shaft in the sleeve engages axially.
  • the second coupling part is in the form of a shaft and the first coupling part is in the form of a sleeve, with the shaft in turn engaging axially in the sleeve.
  • the point of guidance provided is an end point of the guidance.
  • the fastener when moving the engagement member between a first end of the guide and a second end of the guide, the fastener is adjusted between the attaching position and the releasing position.
  • the attaching position of the fastening element and the releasing position of the fastening element are assigned in this development advantageously exactly a first or second end of the guide in the bayonet lock. The user can thus, in the context of a single rotation -. without grasping - move the engagement element completely between the end points of the guide and strike there each.
  • the stop is recognizable to the user due to a stop resistance, so that the user receives feedback as to when the bayonet lock is securely closed or securely released.
  • the user knows at a first stop, for example, that the fastener is sufficiently solved to actually subtract the auxiliary handle of the power tool can.
  • the user also knows at a second stop that the fastener is sufficiently fixed or fixed to the connection area of the power tool to allow safe operation of the power tool.
  • the guide has a profile with a first region having a first gradient and with a second region having a second gradient.
  • the first slope is steeper than the second slope.
  • the guide has an additional third area with a third pitch.
  • an extremal reversal point of the course is provided between the second and third regions.
  • the third slope has a different sign than the first or second slope.
  • the third area advantageously serves to guide the engagement element beyond the extremal reversal point during the exciting attachment of the attachment element in order to secure it in an end region of the guide. An unintentional loosening of a fastener from the connection area of the power tool is thus avoided especially safe.
  • a particularly smooth operation of the bayonet closure is made possible by the fact that the guide in a further development has a substantially concave curved course.
  • a concavely curved course is understood in particular to mean a course with a positive curvature.
  • the lengths of the aforementioned first, second and third regions can also be tuned to the path lengths for fixing a fastener on the connection area.
  • the third region is shorter than the first region and shorter than the second region.
  • the second area is shorter than or equal to the length of the first area.
  • the concept of the invention is advantageous, in particular with regard to a handle which is largely aligned axially along a single handle axis, this allows, in particular, a design of the handle which is not exactly rectilinear or sectionally bent, for example.
  • the concept of the invention may be applicable to a handle formed, for example, in the form of a fully closed bracket or a substantially fully bent but open bracket.
  • a hand tool of the type mentioned in which the features of the characterizing part of claim 15 are provided.
  • the concept of the invention has proved to be advantageous for a hand tool in the form of a combined device such as a hammer drill, a drill bit or the like, such as a chisel hammer.
  • a hand tool machine designed only as chisels or drills or the like.
  • an additional handle has to fulfill two functions which are advantageously supported by means of the concept of the invention. For example, especially when chiselling the leadership of the power tool should be facilitated. Especially when drilling the additional handle is used to catch the torque when a tool blocks.
  • connection area is a device neck, wherein the auxiliary handle is formed as a side handle, which is aligned transversely to a main handle of the power tool
  • the concept of the invention also leads to a system comprising a hand-held power tool and an auxiliary handle, as for example arranged in a hand tool box or the like.
  • Fig. 1 shows a hand tool 100, in the present case in the form of a hammer drill, with a housing 101 and a guide member for supporting a unspecified drive shaft for a tool holder 103.
  • the guide member forms present the connection portion 102 in the form of a device neck.
  • An auxiliary handle 10 on the hand-held power tool 100 can be attached to the connection area 102 - in addition to a main handle 110 formed by the housing 101.
  • the auxiliary handle 10 is aligned as a side handle transversely to the main handle 110 and has an inward grip Fig. 2 fastener 11 shown closer attached in the form of a tension band on the connection portion 102.
  • the housing 101 of the portable power tool 100 also includes a motor housing 104 with a symbolically illustrated electric motor 105 for driving the drive shaft.
  • auxiliary handle 10 In Fig. 2 the auxiliary handle 10 is shown in detail.
  • the additional handle 10 has a feel adapted to the touch of a hand of the user handle 12 at the proximal end of the auxiliary handle 10 and at the opposite distal end is the connecting portion 102 in the form of the device neck comprehensive fastener 11 is formed in the form of the clamping band, in which approximately centrally the axis A of the drive shaft of the power tool 100 runs.
  • the handle 12 and the fastening element 11 are connected to one another via a closure coupling 20.
  • the closure coupling 20 is housed in a protective housing 13 of the auxiliary handle 10, which attaches in the distal direction above the handle 12 and the closure coupling 20 surrounds conformed.
  • the protective housing 13 also surrounds in the attachment of the fastening element 11 a pressure piece 30, which is fixed with the base 31 on the distal side of a fastening portion 11.1 of the fastening element 11, ie within the tension band.
  • the pressure piece 30 When closing the locking coupling 20, the pressure piece 30 is so frictionally pressed against the connection portion 102 in the clamping band that the auxiliary handle 10 securely on the neck of the hand tool 100, for example in the in Fig. 1 is fixed position shown.
  • the base 31 on the side of the connection region 102 allows a particularly good frictional engagement.
  • the closure coupling 20 has a first coupling part 21 in the form of a clamping shaft, which is connected directly to the handle 12, in this embodiment integrally connected. When turning the handle 12, the clamping shaft is rotated directly. Furthermore, the closure coupling 20 has a second coupling part 22 fastened directly on the proximal side of the fastening section 11.1. The second coupling part 22 is fastened to the pressure piece 30 on the proximal side of the fastening portion 11.
  • the trained as a guide sleeve second coupling part 22 takes in the axial direction of a distal end of the matingly engaging first coupling part 21 in the form of the clamping shaft.
  • the tension shaft and the guide sleeve overlap in an engagement region 23 to form an in Fig. 3
  • the bayonet closure 3 is presently formed by means of a movable engaging in a guide 2 engagement member 1.
  • the engagement element 1 is formed in the form of a pin.
  • the guide 2 is formed in the form of a guide groove.
  • the pin is disposed at a distal end portion of the tensioning shaft.
  • the guide groove is arranged in a proximal end region of the guide sleeve.
  • the end regions overlap in a suitable manner with the engagement region 23 and are designated together with 24.1 or 24.2 for the sake of simplicity.
  • the pin has a height sufficient to be forcibly guided in the guide groove against resistance. How out Fig.
  • the leadership of the hammer drill are facilitated as well as a catching a torque during drilling and optionally blocking a tool in the tool holder 102.
  • the in Fig. 3A shown open position of the bayonet lock 3 exactly with a dissolved position of the tension band and the in Fig. 3B shown closed position of the bayonet lock 3 is exactly in accordance with an exciting fixed position of the tension band on the device neck.
  • the user thus noticeably under stop at the end points 3.1 and 3.2 can be seen that the auxiliary handle 10 can be safely solved or fixed.
  • the rotational movement D o , D s is possible without gripping.
  • the course is 4 of the leadership 2 as in Fig. 4 shown in detail is adapted in this embodiment exactly to the requirements of the exciting attaching or releasing movement of the fastener11.
  • a revolution - z. B. in exciting attachment of the fastener 11 on the neck of the device - is accompanied by different resistances due to the applied clamping force.
  • a rotational path of the handle 12 a comparatively large stroke of the course 4 of the guide 3 are assigned.
  • a lesser stroke of the course 4 can be assigned to a same rotational travel of the handle 12.
  • the stroke corresponds to a voltage path of the fastener 11. Accordingly, the course of the guide 3 in Fig.
  • the course 4 showed three areas A, B and C, in which the course has 4 different gradients, designated A s , B s and C s .
  • the slope A s in the first region A is chosen to be comparatively steep and exceeds in dimension a comparatively flat slope B s in the second region B.
  • the curve 4 has a slope C s which has a different sign than the slopes A s , B s - negative here - has.
  • the course 4 of the guide 3 with a total of positive curvature is designed substantially concave.
  • the engagement element 1 Upon rotation of the handle 12, the engagement element 1 follows in the course of its positively guided movement thus substantially the course 4 initially with a steep slope A s finally with a flat slope B s and overcoming an upper extremal reversal point - also referred to as dead center T - engages the engagement member 11th in the third area C beyond the dead center T under stop at the end 3.2 of the guide 3 practically a.
  • Such a geometrical configuration of the course 4 ensures that a comparatively large tensioning distance can be covered in the first area A with a comparatively low resistance between the fastening element 11 and the connection area 102, while in the second area B s a sufficient tension force for the final tightening of the fastening element 11 at the connection area 102 can be applied.
  • the engaging element 1 With only insignificant reduction of the final clamping force of the fastener 11 at the connection portion 102 is finally beyond the dead center T, the engaging element 1 securely locked in the third region C against unintentional release of the coupling coupling 20.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Automatic Tool Replacement In Machine Tools (AREA)
EP11190211.0A 2010-12-22 2011-11-23 Poignée supplémentaire, machine-outil manuelle, système Withdrawn EP2468461A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102010063885A DE102010063885A1 (de) 2010-12-22 2010-12-22 Zusatzhandgriff, Handwerkzeugmaschine, System

Publications (2)

Publication Number Publication Date
EP2468461A2 true EP2468461A2 (fr) 2012-06-27
EP2468461A3 EP2468461A3 (fr) 2015-12-23

Family

ID=45002788

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11190211.0A Withdrawn EP2468461A3 (fr) 2010-12-22 2011-11-23 Poignée supplémentaire, machine-outil manuelle, système

Country Status (3)

Country Link
US (1) US20120160534A1 (fr)
EP (1) EP2468461A3 (fr)
DE (1) DE102010063885A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11084006B2 (en) 2017-03-23 2021-08-10 Milwaukee Electric Tool Corporation Mud mixer
EP4327984A1 (fr) * 2022-08-26 2024-02-28 C. & E. Fein GmbH Dispositif de réglage de poignée

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013201620A1 (de) * 2013-01-31 2014-08-14 Hilti Aktiengesellschaft Abknickbare Haltevorrichtung
JP5997660B2 (ja) * 2013-05-29 2016-09-28 株式会社マキタ 補助ハンドルおよび補助ハンドルを備えた往復動式作業工具
WO2022204118A1 (fr) 2021-03-25 2022-09-29 Milwaukee Electric Tool Corporation Poignée latérale pour outil électrique

Citations (2)

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Publication number Priority date Publication date Assignee Title
DE3731059A1 (de) 1987-09-16 1989-04-06 Hilti Ag Zusatzhandgriff fuer bohrgeraete
EP2191941A2 (fr) 2008-11-28 2010-06-02 HILTI Aktiengesellschaft Poignée supplémentaire pour une machine-outil manuelle

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US3724237A (en) * 1971-06-07 1973-04-03 Black & Decker Mfg Co Attachment coupling for power tool
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EP1514648B1 (fr) * 2003-09-10 2013-11-20 Makita Corporation Manche sans vibration
EP1733851B1 (fr) * 2005-06-15 2013-01-02 Caterpillar Inc. Appareil et procédé de retenue d'outil
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DE102010063912A1 (de) * 2010-12-22 2012-06-28 Hilti Aktiengesellschaft Zusatzgriff, Handwerkzeugmaschine, System

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3731059A1 (de) 1987-09-16 1989-04-06 Hilti Ag Zusatzhandgriff fuer bohrgeraete
EP2191941A2 (fr) 2008-11-28 2010-06-02 HILTI Aktiengesellschaft Poignée supplémentaire pour une machine-outil manuelle

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11084006B2 (en) 2017-03-23 2021-08-10 Milwaukee Electric Tool Corporation Mud mixer
EP4327984A1 (fr) * 2022-08-26 2024-02-28 C. & E. Fein GmbH Dispositif de réglage de poignée

Also Published As

Publication number Publication date
US20120160534A1 (en) 2012-06-28
EP2468461A3 (fr) 2015-12-23
DE102010063885A1 (de) 2012-06-28

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