EP2047953A1 - Poignée et machine-outil manuelle - Google Patents

Poignée et machine-outil manuelle Download PDF

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Publication number
EP2047953A1
EP2047953A1 EP08166209A EP08166209A EP2047953A1 EP 2047953 A1 EP2047953 A1 EP 2047953A1 EP 08166209 A EP08166209 A EP 08166209A EP 08166209 A EP08166209 A EP 08166209A EP 2047953 A1 EP2047953 A1 EP 2047953A1
Authority
EP
European Patent Office
Prior art keywords
handle
securing
handle according
end wall
section
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP08166209A
Other languages
German (de)
English (en)
Other versions
EP2047953B1 (fr
Inventor
Marcus Schuller
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 EP2047953A1 publication Critical patent/EP2047953A1/fr
Application granted granted Critical
Publication of EP2047953B1 publication Critical patent/EP2047953B1/fr
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B25F5/006—Vibration damping means
    • 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
    • B25D17/043—Handles resiliently mounted relative to the hammer housing
    • 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 relates to a handle, in particular an auxiliary handle, for a hand tool according to the preamble of claim 1 and a hand tool according to claim 12.
  • the handles comprise a lower handle portion, on the front side, an elastic, vibration damping element is fixed, on which in turn a fastening portion, comprising an externally threaded portion for fixing the handle to a hand tool, is provided.
  • the invention is based on the idea of proposing a handle which can be produced as simply as possible, in which the risk of injury to the operator is minimized even when the elastic element is detached from the grip section.
  • the invention is based on the idea to secure the attachment portion by means of securing means passing through the elastic element on the handle portion.
  • securing means prevents the handle portion, in the event that the elastic, vibration-damping element should be detached from the handle portion and / or the attachment portion does not tear off completely from the handle, but that the handle as a unit remains, whereby the risk of injury to the operator is minimized when in-use hand tool.
  • the partial embedding of the securing means in the elastic element is particularly advantageous because the securing means are not visible from the outside by the operator and do not hinder the operation of the power tool.
  • the securing means should be designed such that are not or only minimally transmitted to the handle portion by these vibrations of the power tool and thus the attachment portion.
  • the axial extent of the securing means should be chosen so that this maximum allowable relative movement allow the handle portion to the mounting portion without hindrance.
  • the means are designed as a screw connection.
  • the means may comprise a clamping ring, by means of which the handle on the machine tool can be clamped.
  • the elastic, vibration-damping element there are also different implementation possibilities. Particularly preferred is an embodiment in which the rigid securing element is guided with radial clearance through the frontal wall of the handle portion, so as to avoid a vibration transmission on the handle portion largely.
  • the element consists of a foamed plastic.
  • the elastic, vibration-damping element made of a thermoplastic elastomer (TPE) is formed.
  • TPE thermoplastic elastomer
  • the securing means comprise a rigid securing element.
  • This is fixed to the attachment portion and extends at least substantially in the axial direction through the elastic element into the grip portion.
  • the securing element preferably passes through an end wall of the grip section facing the elastic element, at least in sections, and engages behind it, so that complete tearing off of the grip section from the fastening section is avoided.
  • this is the end wall of the handle portion engaging behind portion of the fuse element not directly on the back of the end wall, but is arranged in normal operation with axial distance to the end wall. In this way it is ensured that a relative movement between the handle portion and the mounting portion due to the provision of the elastic, shrinkage-damping element is possible.
  • An air gap does not necessarily have to be provided between the section of the securing element engaging behind the end wall and the end wall.
  • the gap can also be filled, for example, with an elastic, vibration-damping material.
  • the securing element is formed rivet-like.
  • the securing element comprises a rivet shank and an end-side rivet head projecting into the grip section, wherein the rivet head engages behind the end wall, preferably with axial play.
  • the rivet shank is preferably guided with a radial clearance through the front-side handle portion outer wall.
  • the rivet shank is formed thread-free and fixed, for example, by welding to the attachment portion, preferably on the means for, in particular releasably, fixing the attachment portion to the power tool.
  • these means are designed as a screw, wherein it is advantageous if the screw protrudes with its screw head into the elastic, vibration-damping element.
  • a rigid securing element instead of the formation of the rigid securing element as a rivet, it is possible to form a rigid securing element as a screw with an at least partially having an external thread screw shank, wherein the end of the screw shaft projecting into the handle portion screw head is provided, which preferably the frontal wall of the handle portion interspersed with axial play.
  • the fixing of the screw on the fastening portion preferably on the means for fixing the handle to the hand tool, is preferably carried out by screwing, wherein an embodiment is preferred in which suitable means, such as adhesive, are provided for preventing unintentional release of the screw. It is particularly preferred if the screw shaft passes through the end wall of the handle portion with radial clearance.
  • the rigid securing element is designed as a radially expandable grooved pin, wherein the head of the grooved pin prevents detachment of the grip portion of the attachment portion.
  • the head of a locking element designed as a screw is conically shaped, in particular because the widest point of the rigid securing element in this embodiment has the maximum distance to the mounting portion.
  • the securing element is not designed as a classic, one-piece screw, but consists of at least two parts, namely a shaft member and a fixed thereto, the end wall of the handle portion engaging behind the head part.
  • This is preferably formed trough or rock-shaped and open towards the attachment portion.
  • this head part is formed of plastic and preferably pressed onto the shaft. The head part prevents the securing element from slipping through the front opening in the grip section, which is penetrated by the shaft component.
  • securing means are designed to be flexible in order to allow a relative movement between the fastening portion and the handle portion in a simple manner.
  • securing means comprise an annular cross-sectionally preferably cylindrical cage.
  • This cage is preferably formed from wires or suitable plastic cords.
  • the cage is fixed by encapsulation on the attachment portion, in particular a retaining plate of the attachment portion.
  • the cage is additionally or alternatively encapsulated by the elastic member and passes through an end opening of the handle portion, wherein the axial end is preferably arranged at a distance from the end wall of the handle portion, so that a relative movement between the handle portion and securing means is possible.
  • the cage is preferably thickened or connected to a rear wall of the handle portion engaging behind component.
  • the securing means comprise at least one safety rope and / or a securing band, which is fixed at one end to the attachment portion and passes through the elastic element.
  • the safety rope or the securing band is encapsulated by the elastic element.
  • the length of the safety rope or the securing band is to be chosen so that a relative movement between the handle portion and the attachment portion is possible.
  • the safety rope or the securing band is preferably thickened formed at its end received in the handle portion or connected to a rear handle forming member.
  • At least two safety ropes and / or safety bands which are arranged at a distance from the longitudinal central axis of the handle.
  • an embodiment with only a safety rope or securing band can be realized, which is preferably arranged centrally with respect to the longitudinal center axis of the handle.
  • the fixing of the at least one securing band or securing cable can be done by gluing, welding, etc. with the attachment portion, in particular with the means for fixing the attachment portion to the power tool.
  • the invention leads to a hand tool with a previously described handle.
  • the handle may be a main handle of the hand tool machine, which is permanently arranged on the hand tool machine.
  • the handle is designed as an additional handle, which is releasably fixed by means of the means for fixing to the power tool when needed on the power tool.
  • the means for fixing the handle on the hand tool are designed as a screw.
  • the means may comprise a known clamping ring with clamping screw.
  • Fig. 1 is a detail of a handle 1 for a hand tool, not shown, in particular designed as an electric hand tool machine, such as a drill or an angle grinder shown.
  • the Handle 1 comprises a handle portion 2, which is only partially shown and which serves to hold the handle 1.
  • the grip section 2 has a peripheral wall 3 and an end wall 4 formed integrally therewith and facing the handheld power tool. With the end wall is an elastic, vibration damping element 5, for example, connected by gluing or molding.
  • the elastic element 5 in turn is connected to a fastening section 6, which comprises a retaining plate 7 and means 8 for fixing the handle 1 to the machine tool, not shown.
  • the means 8 are defined by encapsulation on the support plate 7 and project back into the element 5 into it.
  • securing means 9 are provided. These exist in Fig. 1 from a rigid securing element 10, which is in Fig. 1 is designed as a rivet.
  • the fuse element 10 includes in the embodiment according to Fig. 1 a rivet shank 11 which is welded to a front side 12 of the means 8 facing the grip portion 2.
  • the rivet shank 11 interspersed with radial play an opening 13 in the element 5 and with radial play an aligned with this opening 14 in the end wall 4 of the handle portion 2.
  • the end wall 4 engages behind with axial distance, that is, has a larger diameter than the opening 14.
  • the diameter of the rivet head 16 is less than that of a head portion of the means 8 Fig. 1 can be seen further, the diameter of the rivet shank 11 is substantially smaller than the diameter of an externally threaded portion 17 of the means eighth
  • the securing means 9 are designed as a grooved pin 18 with a conical head 19, wherein the head 19 is designed in such a way that slippage of the grooved pin 18 through the opening 14 in the end wall 4 is avoided.
  • the notched pin 18 passes through both the opening 13 in the element 5 and the opening 14 with radial clearance.
  • the notched pin 18 is fixed to the means 8 by gluing or welding.
  • an embodiment of the grooved pin 18 with an external thread is conceivable, in which case the grooved pin 18 is preferably screwed to an internal thread of the means 8 or of the attachment section 6.
  • Fig. 3 another embodiment of a handle 1 is shown.
  • the securing means 9 are formed in two parts.
  • the securing means 9 comprise a shaft component 20 made of metal, which is fixed, for example, by gluing or welding to the means 8 of the fastening portion 6.
  • an embodiment of the shaft component 20 with external thread can be realized.
  • the shaft member 20 passes through an opening 13 in the element 5 and an aligned with this opening 14 in the end wall 4 of the handle portion each with radial play.
  • a rock or trough-shaped head part 21 is fixed. This is held in a form-fitting manner in a circumferential groove 22 of the shaft component 20.
  • the head part 20 has the function of a barb and prevents slippage of the securing means 9 through the opening 14th
  • the securing means 9 comprise a wire-formed cylindrical cage 3 which is over-molded by the material forming the element 5.
  • the cage 23 is fixed, for example by encapsulation in the retaining plate 7 of the attachment portion 6. It can be seen that the flexible cage 23 passes through the end wall 4 of the handle portion 2, wherein on the cage 23 with axial distance to the back 15 of the end wall 4, an annular member 24 is fixed, which prevents slipping out of the cage 23 from the handle portion 2.
  • the securing means 9 comprise two safety ropes 25, which are arranged at radial distance to a longitudinal central axis L of the handle 1.
  • the safety ropes 25 are formed thickened at the fixed in the attachment portion 6 end.
  • the fixing in the attachment section 6 takes place by molding the securing cables 25 with the plastic forming the retaining plate 7.
  • the length of the safety cables 25 is dimensioned so that a relative movement between the handle portion 2 and the attachment portion 6 is possible.
  • the safety ropes 25 pass through openings 14 in the end wall 4 of the handle portion 2 and protrude into the handle portion 2 and into a cavity 26 provided therein.
  • the located in the cavity 26 ends 27th are thickened to prevent slipping out of the openings 14.
  • the securing means 9 comprise a securing cable 25, which is arranged essentially centrally with respect to the longitudinal central axis L of the handle 1 and is braided from steel wires.
  • the safety rope 25 is welded to the front end 8 formed with screws as a screw.
  • the safety cable 25 passes through an opening 13 in the element 5 and an opening 14 aligned therewith in the end wall 4 of the handle section 2.
  • a metal pin 28 is provided which prevents the safety cable 25 of the opening 14 from slipping out.
  • the length of the safety rope 25 is dimensioned so that a relative movement between the handle portion 2 and the attachment portion 6 is possible. A complete tearing of the handle portion 2 from the mounting portion 6 is securely prevented by the safety wire 25 with metal pin 28.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Workshop Equipment, Work Benches, Supports, Or Storage Means (AREA)
EP20080166209 2007-10-12 2008-10-09 Poignée et machine-outil manuelle Expired - Fee Related EP2047953B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200710049125 DE102007049125A1 (de) 2007-10-12 2007-10-12 Handgriff sowie Handwerkzeugmaschine

Publications (2)

Publication Number Publication Date
EP2047953A1 true EP2047953A1 (fr) 2009-04-15
EP2047953B1 EP2047953B1 (fr) 2011-09-21

Family

ID=40091407

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20080166209 Expired - Fee Related EP2047953B1 (fr) 2007-10-12 2008-10-09 Poignée et machine-outil manuelle

Country Status (3)

Country Link
EP (1) EP2047953B1 (fr)
CN (1) CN101412215B (fr)
DE (1) DE102007049125A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105710440A (zh) * 2016-04-28 2016-06-29 江苏东成机电工具有限公司 往复式电动工具
US20200198112A1 (en) * 2018-12-20 2020-06-25 Storm Pneumatic Tool Co., Ltd. Auxiliary grip of hand-held power tool

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010040136A1 (de) * 2010-09-02 2012-03-08 Robert Bosch Gmbh Kupplungsvorrichtung für eine Elektrohandwerkzeugmaschine, Zubehörteil sowie Elektrohandwerkzeugmaschine
US12021437B2 (en) 2019-06-12 2024-06-25 Milwaukee Electric Tool Corporation Rotary power tool

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1868712A (en) * 1928-02-04 1932-07-26 Chicago Pneumatic Tool Co Handle for portable tools
GB2080920A (en) * 1980-06-21 1982-02-10 Minamidate Makoto Vibration damping handle
DE10005080C1 (de) 2000-02-04 2001-08-02 Bosch Gmbh Robert Handwerkzeugmaschine mit zumindest einem Handgriff und wenigstens einem elastischen, schwingungsdämpfenden Element
DE10029536A1 (de) 2000-06-15 2001-12-20 Bosch Gmbh Robert Handwerkzeugmaschine mit zumindest einem Handgriff
DE202004012400U1 (de) * 2004-08-07 2005-12-22 Metabowerke Gmbh Elektrohandwerkzeuggerät

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1868712A (en) * 1928-02-04 1932-07-26 Chicago Pneumatic Tool Co Handle for portable tools
GB2080920A (en) * 1980-06-21 1982-02-10 Minamidate Makoto Vibration damping handle
DE10005080C1 (de) 2000-02-04 2001-08-02 Bosch Gmbh Robert Handwerkzeugmaschine mit zumindest einem Handgriff und wenigstens einem elastischen, schwingungsdämpfenden Element
DE10029536A1 (de) 2000-06-15 2001-12-20 Bosch Gmbh Robert Handwerkzeugmaschine mit zumindest einem Handgriff
DE202004012400U1 (de) * 2004-08-07 2005-12-22 Metabowerke Gmbh Elektrohandwerkzeuggerät

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105710440A (zh) * 2016-04-28 2016-06-29 江苏东成机电工具有限公司 往复式电动工具
US20200198112A1 (en) * 2018-12-20 2020-06-25 Storm Pneumatic Tool Co., Ltd. Auxiliary grip of hand-held power tool

Also Published As

Publication number Publication date
DE102007049125A1 (de) 2009-04-16
CN101412215A (zh) 2009-04-22
CN101412215B (zh) 2010-12-08
EP2047953B1 (fr) 2011-09-21

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