EP1332023A1 - Machine-outil a main comportant au moins une poignee - Google Patents

Machine-outil a main comportant au moins une poignee

Info

Publication number
EP1332023A1
EP1332023A1 EP01943157A EP01943157A EP1332023A1 EP 1332023 A1 EP1332023 A1 EP 1332023A1 EP 01943157 A EP01943157 A EP 01943157A EP 01943157 A EP01943157 A EP 01943157A EP 1332023 A1 EP1332023 A1 EP 1332023A1
Authority
EP
European Patent Office
Prior art keywords
securing element
handle
tool according
elastic
hand tool
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
EP01943157A
Other languages
German (de)
English (en)
Other versions
EP1332023B1 (fr
Inventor
Ernst Kraenzler
Manfred Ruff
Harald Krondorfer
Ralph Dammertz
Joerg Goehner
Mario Frank
Franz Scheschark
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=7645854&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP1332023(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Priority to EP08009361A priority Critical patent/EP1955826B1/fr
Publication of EP1332023A1 publication Critical patent/EP1332023A1/fr
Application granted granted Critical
Publication of EP1332023B1 publication Critical patent/EP1332023B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B25F5/006—Vibration damping means
    • 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

  • Hand tool with at least one handle
  • the invention is based on a handheld power tool with at least one handle according to the preamble of claim 1.
  • the handle has a grip part with a metal core, which is covered with a vibration-damping plastic.
  • a first metal sheet is connected at one end to the metal core by means of a screw and is connected to a second metal sheet in the axial direction facing away from the handle part via an elastic buffer.
  • the second metal sheet is in turn connected to a guide drawbar of the device by means of a screw.
  • the invention is based on a hand-held power tool with at least one handle, which has at least one handle part which is fixedly connected to a fastening part via at least one elastic, vibration-damping element, via which the handle part can be fixed to a housing.
  • a connection between the handle part and the fastening part with the elastic element is secured via at least one movable securing element.
  • loosening of the handle part from the housing can be avoided and control of the hand-held power tool via the handle part can always be ensured.
  • Due to the movable design of the securing element vibration transmission via the securing element can be avoided in an intended operation.
  • the fastening part is advantageously designed as a component separate from the housing, but can also be at least partially made in one piece with the housing of the handheld power tool.
  • the securing element is formed by a flexible component, for example by a chain or advantageously by a plastic or a wire rope, etc.
  • a flexible securing element vibration transmission can be avoided in a structurally simple and cost-effective manner and the securing element can be inexpensive be integrated into the elastic element.
  • the elastic element advantageously encloses the securing element.
  • the securing element in the elastic element is arranged centrally along a central axis, as a result of which undesired tensile stresses in the securing element and an associated vibration transmission can be avoided during a tilting movement.
  • the elastic element can be subjected to a higher load-bearing capacity than without pretensioning and breaking, detachment from the handle part and from the fastening part and / or tearing of the elastic element can be avoided , Furthermore, the securing element can advantageously be used to fasten the elastic element on the handle part and on the fastening part, for example by applying a necessary contact pressure by the securing element for an adhesive connection.
  • the compressive stress can advantageously be achieved in the elastic element by tensioning the securing element, for example by tensioning a flexible securing element which is advantageously arranged centrally in the elastic element along a central axis with a tensioning screw.
  • the securing element is formed by a band which encloses the elastic element.
  • the band-shaped The closed surface of the securing element can protect the elastic element, which is made of a generally soft material, from external influences and damage during operation, for example from heat, UV influences, dust, moisture and hard objects, etc.
  • the tape can be made from various materials that appear to be useful to the person skilled in the art, for example from a fabric tape, etc.
  • the securing element can also be inexpensively formed from at least one flexible component which is arranged radially outside the elastic element, for example from one or more ropes.
  • a sleeve made of solid material, which can be fastened to the handle part or to the fastening part and is at a distance from either the grip part or the fastening part, in order to avoid vibration transmission.
  • the securing element can also be formed by a rigid component which is movably mounted relative to the fastening part and / or to the handle part.
  • the securing element can be easily assembled and dismantled so that it can be replaced after a damage.
  • a maximum deflection of the elastic element from a basic position at least in a tilting direction and / or a pushing direction can be determined simply by the securing element, in particular by means of a rigid securing element. An overextension of the elastic element can be avoided by the securing element and a long service life can be achieved.
  • the securing element is advantageously fixed in the fastening part and movably mounted to the handle part, as a result of which an installation space in the handle part is advantageously used for freedom of movement of the securing element and simple assembly can be achieved from the handle part. Furthermore, a fastening screw arranged in the fastening part can be used for a firm connection of the securing element. Additional fastening parts for the securing element can be saved. In principle, however, the securing element could also be designed to be fixed in the grip part and movable to the fastening part.
  • the securing element is formed by a screw, which can be screwed particularly advantageously in the fastening screw in the fastening part.
  • a screw is particularly inexpensive and can be assembled and disassembled quickly and easily.
  • a bolt could also be used, which can be fastened positively, forcefully and / or cohesively either in the handle part or in the fastening part, for example this can be pressed into the fastening screw in the fastening part.
  • a spring can also be used as a securing element, in particular a spiral spring.
  • a securing element formed by a spiral spring With a securing element formed by a spiral spring, a particularly easy assembly can be achieved, especially in automated series production.
  • the elastic element has at least shortly before an advantageously round contact surface with the fastening element and / or Handle part a non-circular cross-sectional area that is smaller than the contact surface, and that the cross-sectional area is particularly advantageously composed of a round core surface and radially adjacent to the core surface outward extensions.
  • a round contour an advantageously large contact area can be achieved between the elastic element and the fastening element and the handle part.
  • the adjoining smaller cross-sectional area allows the contact area to be cooled advantageously.
  • an advantageous structure can be contributed in that heat is removed from an inner region of the elastic element during the manufacture of the elastic element via at least one component.
  • the component can be formed by a securing element already inserted into the elastic element during manufacture or advantageously by a core which is removed from the elastic element after manufacture and advantageously forms a recess for the securing element.
  • the core can advantageously be cooled by a cooling channel with a coolant compared to the inserted securing element.
  • the solution according to the invention can be used in various hand-held power tools that appear to be useful to a person skilled in the art, such as, for example, rotary hammers, chisel hammers, drilling machines, screwdrivers, saws, milling machines, planes, etc.
  • the solution according to the invention can be used particularly advantageously with angle grinders, namely with one additional handle extending transversely to the longitudinal direction, which primarily serves to guide the angle grinder.
  • Fig. 1 shows a schematically illustrated angle grinder from above, 2 a handle according to the invention with a flexible securing element enclosed by an elastic element,
  • FIG. 3 shows a handle with a rod-shaped securing element
  • FIG. 4 shows a detail of an alternative to FIG. 3,
  • FIG. 5 shows a section along the line V-V in Fig. 4 during assembly
  • FIG. 6 shows a handle with an elastic element enclosed by a band-shaped securing element
  • FIG. 7 shows a variant of FIG. 3,
  • Fig. 11 is a section along the line XI-XI in Fig. 7 and
  • Fig. 12 shows a handle according to Fig. 7 in its manufacture.
  • FIG. 1 shows an angle grinder with an electric motor, not shown in detail, which is mounted in a housing 56 and by means of which a cutting disc 54 clamped in a tool holder can be driven.
  • the angle grinder is integrated in the housing 56 on the side facing away from the cutting disc 54 and extends in the longitudinal direction 58 and can be guided via a second handle 10, which extends transversely to the longitudinal direction and is attached to a gear housing 60 in the area of the cutting disc 54 or the tool holder.
  • the handle 10 has a handle part 12, which is firmly connected via an elastic, vibration-damping plastic element 14 to a fastening part 16, by means of which the grip part 12 is fastened to the gear housing 60 of the angle grinder via a threaded pin 18 formed on the fastening part 16.
  • the elastic plastic element 14 is molded onto the handle part 12 and onto the fastening part 16 and is thereby firmly connected to them.
  • the grip part 12 is connected to the fastening part 16 in addition to the elastic plastic element 14 via a movable securing element 20 (FIG. 2).
  • the securing element 20 is formed by a flexible component in the form of a wire rope and is arranged in the elastic plastic element 14 along a central axis. At the ends of the securing element 20, threaded sleeves (not shown in more detail) are fastened, via which the securing element 20 is screwed to the handle part 12 and the fastening part 16.
  • the elastic plastic element 14 encloses the securing element 20. In the assembled state, the securing element 20 is subjected to tension and the elastic plastic element 14 is subjected to pressure.
  • FIG. 3 shows a further embodiment of a handle 26 according to the invention, in which a securing element 22 is formed by a movably mounted, rigid rod, which is molded around by an elastic plastic element 24, to the ends of which disks 30, 32 are each attached.
  • a securing element 22 is formed by a movably mounted, rigid rod, which is molded around by an elastic plastic element 24, to the ends of which disks 30, 32 are each attached.
  • Essentially constant components are generally numbered with the same reference numerals in the exemplary embodiments shown. With regard to the same functions and features, reference can be made to the description of FIG. 1.
  • a sleeve 34, 36 is fastened, each having a disk 38, 40 with coaxial openings 42, 44 in the direction of the elastic plastic element 24.
  • the sleeves 34, 36 and the disks 38, 40 each delimit a space 46, 48 sprayed with elastic material, into which the securing element 22 with its disks 30, 32 is inserted.
  • the disks 30, 32 of the securing element 22 have a larger diameter than the openings 42, 44 and are held captively in the spaces 46, 48.
  • the washer 30 can be unscrewed from the rod-shaped part of the securing element 22.
  • the securing element 22 can then be inserted into the handle part 12 or the fastening part 16 before the sleeves 34, 36 are assembled, and the washer 30 can be screwed back onto the rod-shaped part.
  • the sleeves 34, 36 are connected to the handle part 12 and the fastening part 16 via threaded connections, not shown. After the sleeves 34, 36 are connected to the handle part 12 and the fastening part 16, the securing element 22 is extrusion-coated with elastic plastic.
  • the sleeves 34, 36 with their discs 38, 40 advantageously form a positive connection between the handle part 12 and the elastic plastic element 24 and between the elastic plastic element 24 and the fastening part 16 ago.
  • the elastic plastic element with the securing element, the sleeves and the disks could be designed as a preassembled assembly which is then screwed and glued to the handle part and the fastening part.
  • a maximum deflection of the elastic plastic element 24 is determined by the freedom of movement of the disks 30, 32 of the securing element 22 in the spaces 46, 48, in all directions.
  • the securing element 22 is at a distance filled with elastic material from the sleeves 34, 36 and the disks 38, 40 during normal operation.
  • FIG. 4 and 5 show a further exemplary embodiment of a handle 62, in which a securing element 64 is formed by a movably mounted, rigid rod which is overmolded by an elastic plastic element 24, the ends 66, 68 of which are disc-shaped.
  • a securing element 64 is formed by a movably mounted, rigid rod which is overmolded by an elastic plastic element 24, the ends 66, 68 of which are disc-shaped.
  • a molded part 74, 76 is formed on a fastening part 70 and on a handle part 72, which are each disc-shaped in the direction of the elastic plastic element 24 and have coaxial openings 78, 80.
  • the molded parts 74, 76 each delimit a space 82, 84 sprayed with elastic material, into which the one piece executed securing element 64 is inserted with its disk-shaped ends 66, 68 during assembly.
  • the securing element 64 is guided with its rod-shaped part transversely to the longitudinal direction of the handle 62 through lateral openings 86, 88 of the molded parts 74, 76 (FIG. 5).
  • the securing element 64 is secured in the molded parts 74, 76 against its insertion direction 90 through the openings 86, 88 by L-shaped molded parts 92, 94 in the longitudinal section perpendicular to the insertion direction 90 and transversely to the longitudinal direction, each with an opening 96, 98 the rod-shaped part of the securing element 64 are pushed.
  • the disk-shaped ends 66, 68 of the securing element 64 have a larger diameter than the openings 78, 80 and are held captively in the spaces 82, 84.
  • the securing element 64 is then extrusion-coated with plastic.
  • a width 100 of the openings 86, 88 transverse to the longitudinal direction of the handle 62 and perpendicular to the insertion direction 90 of the securing element 64 is advantageously made smaller than a diameter 102 of the rod-shaped part of the securing element 64, so that the securing element 64 against resistance through the openings 86, 88 must be pushed and then snapped into the openings 78, 80 of the molded parts 74, 76.
  • the securing element 64 is secured in the openings 78, 80 of the molded parts 74, 76, and the molded parts 92, 94 can advantageously be saved.
  • FIG. 6 shows a further exemplary embodiment of a handle 50, in which, according to the invention, a securing element 28 is formed by a flexible fabric band which encloses an elastic plastic element 52.
  • the band-shaped Si Securing element 28 is designed to be essentially inextensible in the longitudinal direction of the handle 50 and has a plastic collar (not shown in more detail) with the handle part 12 and the fastening part 16, with which the band-shaped securing element 28 is firmly connected via snap connections to the handle part 12 or with the fastening part 16.
  • the elastic plastic element 52 is through the securing element 28 Protected from external influences and damage when using the angle grinder. Furthermore, the securing element 28 determines a maximum deflection of the elastic plastic element 52 from a basic position, specifically in the pushing, tilting and pulling direction. In the maximum deflection positions, the securing element 28 is tensioned and avoids further deflection of the elastic plastic element 52.
  • FIG. 3 an alternative handle 104 is shown for the exemplary embodiment in FIG. 3.
  • the handle 104 has a fastening part 110 which is firmly connected to a handle part 106 via an elastic plastic element 108.
  • the connection between the fastening part 110 and the handle part 106 is secured via a securing element 112 formed by a screw (FIG. 8).
  • the fastening part 110 and the grip part 106 are first injection molded from plastic, with a fastening screw 114 is inserted and overmolded in the axial direction and in the direction of rotation, which has an internal thread 120 in addition to an external thread 118 for attachment to a machine housing in the direction of the handle part 106.
  • the fastening screw 114 could also be subsequently pressed into a fastening part.
  • the fixing part 110 with the fixing screw 114 and the handle part 106 are inserted into a mold 140 in order to be integrally connected in a spraying process to the elastic plastic element 108 (FIG. 12).
  • the mold 140 is designed in such a way that the elastic plastic element 108 has a non-circular cross-sectional area 116 shortly in front of a round contact surface 146 for the fastening part 110 and a round contact surface 134 ' for the grip part 106, each of which is smaller than the contact surfaces 134, 146 the cross-sectional area 116 each has a round core surface 122, to which four arcuate extensions 124, 126, 128, 130 adjoin radially outward (FIGS. 9 and 11). More or less than four arcuate extensions 124, 126, 128, 130 would also be possible.
  • the elastic plastic element 108 has a round cross-sectional area 136 (FIG. 10).
  • a core 142 which is cooled via a liquid channel 148, is introduced into the mold 140 and forms a recess 144 for the securing element 112, via which heat is dissipated from the inner region of the elastic plastic element 108 during manufacture.
  • the handle part 106 is hollow on the inside and has a recess 138 in the direction of the fastening part 110, through which the core 142 protrudes and which is partially covered with the elastic plastic element 108. is injected, so dal. an edge region of the recess 138 is engaged behind by a collar 150 of the elastic plastic element 108.
  • the securing element 112 is guided from the handle part 106 through the recess 144 made by the core 142 in the direction of the fastening part 110 through the elastic plastic element 108 and screwed into the internal thread 120 in the fastening screw 114.
  • the securing element 112 has a screw head 132 which, in the assembled state of the securing element 112, is at a distance from the handle part 106, so that the securing element 112 is movably mounted relative to the handle part 106.
  • the screw head 132 is larger than the recesses 138 and 144, so that if the elastic plastic element 108 is damaged, the grip part 106 is captively connected to the fastening part 110.
  • the distance between the screw head 132 and the handle part 106 determines a maximum permissible deflection of the elastic plastic element 108. With a maximum deflection, the collar 150 prevents direct contact between the screw head 132 and the handle part 106 and largely prevents vibration transmission.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Harvester Elements (AREA)
  • Steering Devices For Bicycles And Motorcycles (AREA)
  • Portable Power Tools In General (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)

Abstract

L'invention concerne une machine-outil à main comportant au moins une poignée (10, 26, 50, 62, 104) qui présente au moins une partie de préhension (12, 72, 106) raccordée solidement par l'intermédiaire d'au moins un élément élastique (14, 24, 52, 108), amortissant les vibrations, à une partie de fixation (16, 70, 110) permettant de fixer la partie de préhension (12, 72, 106) sur un boîtier (60). Selon l'invention, la liaison entre la partie de préhension (12, 72, 106) et la partie de fixation (16, 70, 110) est bloquée par l'élément élastique (14, 24, 52, 108) par l'intermédiaire d'au moins un élément de blocage mobile (20, 22, 28, 64, 112).
EP01943157A 2000-06-15 2001-05-25 Machine-outil a main comportant au moins une poignee Expired - Lifetime EP1332023B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP08009361A EP1955826B1 (fr) 2000-06-15 2001-05-25 Machine-outil dotée d'au moins une poignée

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10029536 2000-06-15
DE10029536A DE10029536A1 (de) 2000-06-15 2000-06-15 Handwerkzeugmaschine mit zumindest einem Handgriff
PCT/DE2001/002024 WO2003043785A1 (fr) 2000-06-15 2001-05-25 Machine-outil a main comportant au moins une poignee

Related Child Applications (1)

Application Number Title Priority Date Filing Date
EP08009361A Division EP1955826B1 (fr) 2000-06-15 2001-05-25 Machine-outil dotée d'au moins une poignée

Publications (2)

Publication Number Publication Date
EP1332023A1 true EP1332023A1 (fr) 2003-08-06
EP1332023B1 EP1332023B1 (fr) 2008-08-20

Family

ID=7645854

Family Applications (2)

Application Number Title Priority Date Filing Date
EP01943157A Expired - Lifetime EP1332023B1 (fr) 2000-06-15 2001-05-25 Machine-outil a main comportant au moins une poignee
EP08009361A Expired - Lifetime EP1955826B1 (fr) 2000-06-15 2001-05-25 Machine-outil dotée d'au moins une poignée

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP08009361A Expired - Lifetime EP1955826B1 (fr) 2000-06-15 2001-05-25 Machine-outil dotée d'au moins une poignée

Country Status (6)

Country Link
US (1) US8522894B2 (fr)
EP (2) EP1332023B1 (fr)
JP (1) JP4860904B2 (fr)
CN (1) CN1289267C (fr)
DE (3) DE10029536A1 (fr)
WO (1) WO2003043785A1 (fr)

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US20050224244A1 (en) 2005-10-13
CN1460048A (zh) 2003-12-03
DE50115631D1 (de) 2010-10-28
EP1332023B1 (fr) 2008-08-20
DE50114254D1 (de) 2008-10-02
WO2003043785A1 (fr) 2003-05-30
JP4860904B2 (ja) 2012-01-25
JP2005509534A (ja) 2005-04-14
DE10029536A1 (de) 2001-12-20
EP1955826A1 (fr) 2008-08-13
US8522894B2 (en) 2013-09-03
CN1289267C (zh) 2006-12-13
EP1955826B1 (fr) 2010-09-15

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