EP3778131A1 - Boitier pour un appareil outil portatif électrique - Google Patents

Boitier pour un appareil outil portatif électrique Download PDF

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Publication number
EP3778131A1
EP3778131A1 EP20190270.7A EP20190270A EP3778131A1 EP 3778131 A1 EP3778131 A1 EP 3778131A1 EP 20190270 A EP20190270 A EP 20190270A EP 3778131 A1 EP3778131 A1 EP 3778131A1
Authority
EP
European Patent Office
Prior art keywords
handle
housing part
main housing
area
damping 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.)
Granted
Application number
EP20190270.7A
Other languages
German (de)
English (en)
Other versions
EP3778131B1 (fr
Inventor
Michael Kukla
Stefan Schwarz
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.)
Metabowerke GmbH and Co
Original Assignee
Metabowerke GmbH and Co
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 Metabowerke GmbH and Co filed Critical Metabowerke GmbH and Co
Publication of EP3778131A1 publication Critical patent/EP3778131A1/fr
Application granted granted Critical
Publication of EP3778131B1 publication Critical patent/EP3778131B1/fr
Active 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
    • B25D—PERCUSSIVE TOOLS
    • B25D2216/00—Details of portable percussive machines with superimposed rotation, the rotational movement of the output shaft of a motor being modified to generate axial impacts on the tool bit
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2222/00—Materials of the tool or the workpiece
    • B25D2222/54—Plastics
    • B25D2222/57—Elastomers, e.g. rubber

Definitions

  • the invention relates to a housing for an electric hand tool device with a main housing part and with a handle firmly connected to the main housing part in a connection area according to the type defined in more detail in the preamble of claim 1.
  • the invention also relates to an electric hand tool device with such a housing.
  • a generic housing for an electric hand tool device is from DE 10 2006 059 348 A1 known.
  • the handle is molded onto the housing in one area by means of a material bridge, whereas in an area spaced apart therefrom there is an intermediate space between the housing and the handle.
  • damping of the vibrations emanating from the tool or an impact mechanism integrated into the device is intended to be dampened or isolated from the handle.
  • such a vibration damping can be achieved with the described device, but the design of the material bridge forming the connection between the handle and the housing are very narrow, since the desired vibration damping is not achieved if the cross-section is too large in this area.
  • the housing according to the invention has a recess in an area between the connection area and the movement area in which the handle is spaced from the main housing part, whereby the housing can deform and the vibrations introduced into the handle via the connection area in a relative movement between the Handle and the main housing part can be converted. In this way, the handle is decoupled from a tool connected to the electric hand tool device.
  • a damping element which has a greater elasticity than the material of the main housing part, is inserted into the recess according to the invention.
  • This damping element can be deformed when the handle moves relative to the main housing part, so that it does not hinder the desired movements which serve to reduce or dampen vibrations.
  • Another advantage of the solution according to the invention is that no additional installation space is required since the damping element in principle forms part of the main housing part and thus of the entire housing.
  • the recess is arranged on the diametrically opposite side of the movement area. In this way, the best possible freedom of movement for the movement of the handle with respect to the main housing part in the movement area is achieved.
  • the damping element consists of an elastomer, in particular a thermoplastic elastomer, this results in particularly good elasticity, which means that the handle is very mobile in the area in which the damping element is located.
  • the recess of the handle is designed as a slot protruding into the handle in an outer wall of the handle.
  • the handle can deform particularly well in order to improve its movement with respect to the main housing part.
  • a very simple way of producing the housing according to the invention arises when the damping element is connected to the main housing part by means of multi-component injection molding. It is particularly advantageous that there are no additional costs for producing the damping element, since in most cases further areas or components of the housing are manufactured using multi-component technology anyway.
  • the main housing part is movably supported in relation to the handle in the range of motion by means of a connecting web connected to the main housing part. This results in a certain connection between the handle and the main housing part, while still ensuring mobility between these two components.
  • the connecting web is movably supported in a guide of the handle and is guided in the lateral direction, and that the handle has at least one stop element to limit the movement of the connecting web relative to the Has handle. In this way, a limitation of the relative movement between the handle and the main housing part is also achieved.
  • An electric hand tool device with a housing according to the invention is specified in claim 9.
  • Such an electric hand tool device uses the advantages described in connection with the housing, so that the vibrations generated by the electric hand tool device are passed on to the handle in a greatly reduced manner.
  • the solution according to the invention can be used advantageously in particular when the electric hand tool device is designed as a drill, in particular as a hammer drill.
  • FIG 1 shows a side view of an electric hand tool device 1, in the present case a drill or a hammer drill.
  • the electric hand tool device 1 has a housing 2 in which the essential components of the electric hand tool device 1 are accommodated.
  • a drive device 3 a gear 4 and control electronics 5 are arranged within the housing 2, each shown by means of dashed lines.
  • the drive device 3, which can be designed as an electric motor, for example, is used to drive a tool 6, which is accommodated in a chuck 7 of the electric hand tool device 1.
  • a battery 8, which can be connected to the housing 2 in a manner known per se, is used to supply power to the drive device 3 and the control electronics 5.
  • a so-called hammer mechanism can be integrated into the transmission 4, as is customary in hammer drills or rotary hammers. Be through the striking mechanism Vibrations introduced into the housing 2 of the electric hand tool device 1, which can be unpleasant for a user of the same. In order to reduce or dampen these vibrations as much as possible, the housing 2 is designed as described below.
  • the housing 2 has a main housing part 2a in which, among other things, the drive device 3, the transmission 4 and the control electronics 5 are accommodated.
  • the chuck 7 is attached to the transmission 4.
  • the housing 2 has a handle 9, which is firmly connected to the main housing part 2a in a connection area 10.
  • the main housing part 2a merges directly into the handle 9 in the connection area 10.
  • the handle 9 and the main housing part 2a are therefore connected components.
  • the handle 9 and the housing main part 2a are manufactured in one operation, for example by injection molding.
  • an intermediate space 12 is provided between the handle 9 and the main housing part 2a.
  • the handle 9 can move in this movement range 11 relative to the main housing part 2a.
  • Such movements of the handle 9 with respect to the main housing part 2a can result from the vibrations which are introduced into the handle 9 via the connecting area 10 from the main housing part 2a.
  • the arrangement of the handle 9 with respect to the main housing part 2a in the movement area 11 is a floating bearing.
  • the shape of the handle 9 corresponds to the general shape of a so-called D-handle, whereby, in contrast to known solutions, the space 12 is present between the handle 9 and the main housing part 2a.
  • the handle 9 is, as described above, connected in one piece to the main housing part 2a.
  • the handle 9 has a recess 13 into which a damping element 14 is inserted, which has a greater elasticity than the material of the main housing part 2a.
  • the recess 13 which in the present case is designed as a slot protruding into the handle 9 in an outer wall of the handle 9, the cross section of the handle 9 is greatly reduced in this area, so that the handle 9 can deform in this area, which enables the above-described movements of the handle 9 relative to the main housing part 2a.
  • These deformations are almost not inhibited by the damping element 14. Rather, the damping element 14 can also deform due to its high elasticity and only forms a closed outer contour of the handle 9.
  • the depth of the recess 12 is approximately half the width of the handle 9 in this area and extends in a direction perpendicular to the drawing plane through the entire handle 9.
  • the damping element 14 can for example consist of an elastomer, in particular a thermoplastic elastomer.
  • the main housing part 2a consists of a suitable, hard plastic such as polyamide.
  • the handle 9 can consist of the same material as the housing main part 2a. Of course, other materials are conceivable both for the main housing part 2a and the handle 9 and for the damping element 14.
  • the damping element 14 can be connected to the main housing part 2a by means of the known method of multi-component injection molding.
  • the recess 13 in the present case has two lateral extensions into which the material of the damping element 14 can flow during the multi-component injection molding process, so that the damping element 14 is clamped to the handle 9.
  • the recess 13 with the damping element 14 arranged therein acts like a joint around which the deformation of the handle 9 can take place. It will the resilient effect that results from the choice of the material of the handle 9 is used.
  • the recess 13 is arranged in the present case on the diametrically opposite side of the movement area 11. In principle, however, other locations for accommodating the recess 13 with the damping element 14 arranged therein would also be conceivable.
  • the damping element 14 has at least one, in the present case a plurality of internal recesses 15.
  • the recesses 15 are preferably not filled, ie there is air in the recesses 15.
  • the flexibility or elasticity of the damping element 14 can be adjusted through the inner recesses 15 and the webs that remain between the inner recesses 15.
  • the elasticity of the damping element 14 is reduced by an enlargement of the inner recesses 15 and / or a reduction in the size of the webs or increased by a reduction in the size of the internal recesses 15 and / or an enlargement of the webs.
  • a softer material can also be used for the same.
  • the damping element 14 is designed in the form of a honeycomb structure in the illustrated embodiment. If necessary, however, a significantly smaller number of inner recess 15 or only one inner recess 15 could be provided.
  • FIG. 3 the embodiment of the movement area 11 between the main housing part 2a and the handle 9 is shown more clearly.
  • the main housing part 2a is movably supported in relation to the handle 9 in the movement area 11 by means of a connecting web 16 connected to the main housing part 2a.
  • the connecting web 16 is, as in particular in FIG Figure 4 can be seen, mounted movably in a guide 17 of the handle 9 and guided in the lateral direction. This is achieved in that the connecting web 16 is widened on its side facing away from the main housing part 2a 16a, and that the width of the guide 17 in this area is slightly greater than the width of the widening 16a.
  • the handle 9 has a stop element 18 which limits the movement of the connecting web 16 with respect to the handle 9.
  • the stop element 18 is formed by the guide 17 and generates a stop for the movements of the handle 9 in both possible directions of movement of the connecting web 16 designated by "x". This results in a path limitation for the movement of the handle 9 relative to the main housing part 2a in both directions. Furthermore, lateral movements of the handle 9 are avoided by the design of the guide 17.
  • the connecting web 16 can consist, for example, of aluminum and be connected to a part of the transmission 4 which is arranged in the main housing part 2a. As in Figure 5 As can be seen, the intermediate space 12, which is provided in the movement area 11, is covered by means of a bellows 19.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)
EP20190270.7A 2019-08-12 2020-08-10 Boitier pour un appareil outil portatif électrique Active EP3778131B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102019121700.8A DE102019121700A1 (de) 2019-08-12 2019-08-12 Gehäuse für ein Elektrohandwerkzeuggerät

Publications (2)

Publication Number Publication Date
EP3778131A1 true EP3778131A1 (fr) 2021-02-17
EP3778131B1 EP3778131B1 (fr) 2024-04-03

Family

ID=72039415

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20190270.7A Active EP3778131B1 (fr) 2019-08-12 2020-08-10 Boitier pour un appareil outil portatif électrique

Country Status (2)

Country Link
EP (1) EP3778131B1 (fr)
DE (1) DE102019121700A1 (fr)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0928669A2 (fr) * 1998-01-13 1999-07-14 Lord Corporation Outil motorisé et isolateur de vibrations pour un tel outil
EP1867442A2 (fr) * 2006-06-16 2007-12-19 Hitachi Koki Co., Ltd. Outil électrique
DE102006059348A1 (de) 2006-12-15 2008-07-03 Robert Bosch Gmbh Handwerkzeugmaschine mit schwingungsentkoppeltem Handgriff
EP2119537A1 (fr) * 2008-05-17 2009-11-18 Metabowerke GmbH Machine-outil électrique manuelle
EP2181810A1 (fr) * 2008-10-30 2010-05-05 AEG Electric Tools GmbH Outil électrique à vibrations amorties
EP2202034A1 (fr) * 2007-09-18 2010-06-30 Makita Corporation Machine-outil portative
WO2011001979A1 (fr) * 2009-07-02 2011-01-06 株式会社マキタ Outil de travail

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5834271B2 (ja) * 1980-07-18 1983-07-26 日立工機株式会社 振動工具のハンドル防振装置
JPH08126975A (ja) * 1994-10-28 1996-05-21 Hitachi Koki Co Ltd 電気ハンマの防振ハンドル
US9849577B2 (en) * 2012-02-03 2017-12-26 Milwaukee Electric Tool Corporation Rotary hammer
JP6095460B2 (ja) * 2013-04-17 2017-03-15 株式会社マキタ ハンドルおよび動力工具

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0928669A2 (fr) * 1998-01-13 1999-07-14 Lord Corporation Outil motorisé et isolateur de vibrations pour un tel outil
EP1867442A2 (fr) * 2006-06-16 2007-12-19 Hitachi Koki Co., Ltd. Outil électrique
DE102006059348A1 (de) 2006-12-15 2008-07-03 Robert Bosch Gmbh Handwerkzeugmaschine mit schwingungsentkoppeltem Handgriff
EP2202034A1 (fr) * 2007-09-18 2010-06-30 Makita Corporation Machine-outil portative
EP2119537A1 (fr) * 2008-05-17 2009-11-18 Metabowerke GmbH Machine-outil électrique manuelle
EP2181810A1 (fr) * 2008-10-30 2010-05-05 AEG Electric Tools GmbH Outil électrique à vibrations amorties
WO2011001979A1 (fr) * 2009-07-02 2011-01-06 株式会社マキタ Outil de travail

Also Published As

Publication number Publication date
DE102019121700A1 (de) 2021-02-18
EP3778131B1 (fr) 2024-04-03

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