EP3727762A1 - Vibrationsgedämpfte handwerkzeugmaschine - Google Patents
Vibrationsgedämpfte handwerkzeugmaschineInfo
- Publication number
- EP3727762A1 EP3727762A1 EP18801003.7A EP18801003A EP3727762A1 EP 3727762 A1 EP3727762 A1 EP 3727762A1 EP 18801003 A EP18801003 A EP 18801003A EP 3727762 A1 EP3727762 A1 EP 3727762A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- stiffness
- vibration
- compression spring
- hand tool
- rigidity
- 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
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
- B25D—PERCUSSIVE TOOLS
- B25D17/00—Details of, or accessories for, portable power-driven percussive tools
- B25D17/24—Damping the reaction force
-
- 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
Definitions
- the present invention relates to an electric hand tool machine comprising a percussion mechanism assembly vibrating along a vibration axis and a handle assembly that is vibration-decoupled via an anti-vibration unit, the anti-vibration unit having a multi-turn spring wire helix oriented along the vibration axis.
- a hand tool machine is known for example from DE 10 2007 000 270 A1.
- the spring wire coil is formed as a cylindrically progressive compression spring with two stiffness ranges of different stiffness.
- a nonlinear spring characteristic of the spring wire coil can be achieved in a structurally simple and cost-effective manner.
- the anti-vibration unit is free of a threaded dome, on which the spring wire coil is at least partially screwed.
- the spring wire coil is formed as a cylindrically progressive compression spring with two stiffness ranges of different stiffness, a comparatively simple adaptation of the stiffness curve is possible, namely only by replacing the spring wire coil itself.
- the spring wire coil provided as a cylindrically progressive compression spring is designed to be progressive on one side.
- the higher stiffness range of stiffness sequentially joins the low stiffness range of stiffness.
- the spring wire coil provided as a cylindrically progressive compression spring is progressively formed on both sides and preferably has a third stiffness range.
- the third stiffness region has the same rigidity as the stiffness region having the lower stiffness.
- the Stiffness range with the higher rigidity, along the vibration axis, between the stiffness ranges with the lower stiffness is provided.
- the stiffness regions with the respectively low rigidity along the vibration axis have the same length.
- the stiffness regions with the respective lower stiffness along the vibration axis can be shorter than a length of the stiffness region with the higher rigidity.
- the compression spring has a constant outer diameter.
- the compression spring in the unloaded state has a length between 65 and 75 mm.
- the compression spring 66 has an outer diameter of between 19 and 23 mm.
- Fig. 1 is a schematic representation of a first preferred embodiment of an electric Flandwerkmaschine
- Fig. 2 is a schematic representation of the progressive compression spring of
- Fig. 3 shows an alternative embodiment of a cylindrically progressive compression spring
- Fig. 4 shows the progressive compression spring of Figure 3 in different load conditions.
- FIG. 1 A preferred embodiment of a power hand tool 100 is shown in FIG.
- the electric hand tool 100 is provided as a hammer drill.
- the hand tool 100 has a percussion mechanism assembly 10 vibrating longitudinally along the vibration axis A.
- the striking mechanism assembly 10 includes an electric motor and a transmission, which are not shown here.
- the electric hand tool 100 further has a handle assembly 20, which is vibration-decoupled via an anti-vibration unit 30.
- the anti-vibration unit 30 in turn has a spring wire coil 35 oriented along the vibration axis A and having a plurality of turns.
- the impact mechanism assembly 10 is slidably mounted via a sliding guide 60 in a housing unit 90 of the portable power tool 100.
- the housing 90 can in turn be handled via a rear handle 25 and a front handle 55.
- the striking mechanism assembly 10 is connected to the housing unit 90 via an articulated arm 37 such that the striking mechanism assembly 10 can move along the vibration axis A.
- the movement of the percussion mechanism assembly 10 is limited by a front stop buffer 70 and a rear stop buffer 73 relative to its movement along the vibration axis A.
- the spring wire coil 35 is designed as a cylindrically progressive compression spring 36 with two stiffness ranges S1, S2 of different degrees of rigidity.
- the spring wire coil 35 provided as a cylindrically progressive compression spring 36 is formed progressively on one side, wherein the stiffness region S2 with the higher rigidity connects sequentially to the stiffness region S1 with the lower rigidity.
- the cylindrically progressive compression spring 36 of FIG. 1 is shown in detail. Good to see that the cylindrically progressive compression spring 36 has two stiffness ranges S1, S2, which - in relation to the vibration axis - sequentially connect to each other. In this case, the two stiffness regions S1, S2 have different stiffnesses.
- the first rigidity region S1 has a lower rigidity than the second rigidity region S2.
- FIG. 3 A cylindrically progressive compression spring 36, which is progressively formed on both sides, is shown in FIG.
- the compression spring 36 of FIG. 3 has three stiffness regions S1, S2, S3.
- first stiffness region S1 has a lower rigidity than the second rigidity region S2 having a high rigidity.
- the third rigidity region S3 has the same rigidity as the first rigidity region S1, so both the first rigidity region S1 and the second rigidity region S3 each have a lower rigidity than the middle, second rigidity region S2.
- stiffness region S2 with the higher rigidity, along the vibration axis A is located between the stiffness regions S1, S2 with the respectively low rigidity.
- the stiffness regions S1, S3 with the respective lower rigidity have, along the vibration axis A, the same length LS1, LS3. This has the advantage that a risk of kinking the double-sided progressively formed cylindrical compression spring 36 is reduced.
- the stiffness regions S1, S3 with the respectively low rigidity along the vibration axis A are shorter than a length LS2 of the stiffness region S2 with the higher rigidity.
- the compression spring 36 has a constant outer diameter.
- Fig. 4A the compression spring 36 in the unloaded state.
- a nominal length of the compression spring 36 is about 69.55 mm.
- Fig. 4B shows the state of the compression spring 36 in the installed and unactuated state.
- the nominal length L1 of the unloaded compression spring 36 is about 56.50 mm, the associated spring force F1 for the unactuated state is about 132.5 N.
- Fig. 4C finally shows the compression spring 36 in the installed and actuated state.
- the nominal length L2 is here about 42.5 mm with an associated spring force F2 of about 310.1 N.
- FIG. 5 shows further technical characteristics of the particularly preferred double-sided progressive compression spring 36 of FIG. 4.
- the nominal lengths L0, L1, L2 the spring force F1 associated with the nominal length L1 and the spring force F2 associated with the nominal length L2 have already been described with reference to FIG.
- Flavoring is in the structurally preferred compression spring 36, a wire diameter d of 2.8 mm and a mean turn diameter of the compression spring 36 Dm of about 18.2 mm.
- the number of resilient turns n is calculated about 9.9 turns.
- the total number of turns nt is calculated about 13.1 turns.
- Fig. 6 finally shows a characteristic spring diagram for the preferred cylindrically progressive compression spring 36 which is progressively formed on both sides and has three stiffness ranges.
- the relationship between the respective nominal lengths L0, L1, L2 and the associated Flubditionen F1, F2, etc. can be seen here.
- Fig. 7 finally, the spring characteristic of the preferred compression spring 36 of FIG. 3 to 6 is shown.
- a Flubhard F is plotted in N against the spring travel s in mm. It can be clearly seen that the spring characteristic curve increases linearly up to a fluff tension Fx of approximately 213.42 N in order to bend off from this point (bending point of the spring characteristic curve) towards a steeper spring characteristic curve section.
- the spring characteristic of the compression spring 36 thus has a total of a progressive behavior.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Percussive Tools And Related Accessories (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP17208325.5A EP3501750A1 (de) | 2017-12-19 | 2017-12-19 | Vibrationsgedämpfte handwerkzeugmaschine |
| PCT/EP2018/082028 WO2019120837A1 (de) | 2017-12-19 | 2018-11-21 | Vibrationsgedämpfte handwerkzeugmaschine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP3727762A1 true EP3727762A1 (de) | 2020-10-28 |
| EP3727762B1 EP3727762B1 (de) | 2023-10-18 |
Family
ID=60673931
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP17208325.5A Withdrawn EP3501750A1 (de) | 2017-12-19 | 2017-12-19 | Vibrationsgedämpfte handwerkzeugmaschine |
| EP18801003.7A Active EP3727762B1 (de) | 2017-12-19 | 2018-11-21 | Vibrationsgedämpfte handwerkzeugmaschine |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP17208325.5A Withdrawn EP3501750A1 (de) | 2017-12-19 | 2017-12-19 | Vibrationsgedämpfte handwerkzeugmaschine |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US11518017B2 (de) |
| EP (2) | EP3501750A1 (de) |
| WO (1) | WO2019120837A1 (de) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI807998B (zh) * | 2022-09-19 | 2023-07-01 | 施瑞源 | 限力減震裝置 |
| EP4684920A1 (de) * | 2024-07-23 | 2026-01-28 | Hilti Aktiengesellschaft | Werkzeugmaschine mit versetzter linearführung |
Family Cites Families (49)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2454818A (en) * | 1946-03-07 | 1948-11-30 | Victor F Lucht | Gun recoil spring surge dampener |
| US2559903A (en) * | 1947-01-31 | 1951-07-10 | Cleveland Wire Spring Company | Spring dampener |
| US2533703A (en) * | 1947-06-21 | 1950-12-12 | Black & Decker Mfg Co | Impact nut runner |
| US2613656A (en) * | 1950-02-23 | 1952-10-14 | Gen Motors Corp | Belleville rotator and spring surge damper |
| US2789550A (en) * | 1955-01-31 | 1957-04-23 | Gen Motors Corp | Anti-surge spring means |
| US3141660A (en) * | 1961-03-08 | 1964-07-21 | Woodhead Monroe Ltd | Coil springs |
| US3411591A (en) * | 1966-03-03 | 1968-11-19 | Hughes Tool Co | Coil power spring impact mechanism |
| CS149009B1 (de) * | 1971-02-01 | 1973-05-24 | ||
| JPS6044530B2 (ja) * | 1980-03-13 | 1985-10-04 | 正治 窪川 | 振動機器の防振緩衝把手 |
| US4420141A (en) * | 1981-08-26 | 1983-12-13 | Caterpillar Tractor Co. | Variable rate valve spring |
| DE8522888U1 (de) * | 1985-08-08 | 1985-10-10 | Fichtel & Sachs Ag, 8720 Schweinfurt | Progressive Druckfeder in Kupplungsscheiben |
| JPH08126975A (ja) * | 1994-10-28 | 1996-05-21 | Hitachi Koki Co Ltd | 電気ハンマの防振ハンドル |
| US5697456A (en) * | 1995-04-10 | 1997-12-16 | Milwaukee Electric Tool Corp. | Power tool with vibration isolated handle |
| DE19943629B4 (de) * | 1999-09-11 | 2015-04-09 | Andreas Stihl Ag & Co. | Handgeführtes Arbeitsgerät |
| DE10136015A1 (de) * | 2001-07-24 | 2003-02-13 | Bosch Gmbh Robert | Handwerkzeugmaschine mit vibrationsgedämpftem Handgriff |
| DE10334906B4 (de) | 2002-07-30 | 2018-11-15 | Andreas Stihl Ag & Co. Kg | Antivibrationselement |
| DE10255162A1 (de) * | 2002-11-22 | 2004-06-03 | Hilti Ag | Vibrationsentkoppelte Schlagwerksbaugruppe |
| US7527107B2 (en) * | 2003-07-15 | 2009-05-05 | Wacker Construction Equipment Ag | Working tool with damped handle |
| GB2407791A (en) * | 2003-11-04 | 2005-05-11 | Black & Decker Inc | Vibration reduction apparatus for a power tool |
| DE102004006359A1 (de) * | 2004-02-09 | 2005-08-25 | Röhm GmbH & Co. KG | Federunterstützte Aufhängung für Lärmschutzelemente |
| DE102004031866B4 (de) * | 2004-07-01 | 2015-09-10 | Andreas Stihl Ag & Co. Kg | Handgeführtes Arbeitsgerät |
| DE202004013670U1 (de) * | 2004-09-01 | 2004-11-04 | Wacker Construction Equipment Ag | Hammer mit abgefederter Schutzhaube |
| EP1674211A1 (de) * | 2004-12-23 | 2006-06-28 | BLACK & DECKER INC. | Gehäuse für ein kraftgetriebenes Werkzeug |
| ATE396838T1 (de) * | 2004-12-23 | 2008-06-15 | Black & Decker Inc | Kraftwerkzeuggehäuse |
| DE102006003202B4 (de) * | 2005-02-17 | 2018-11-08 | Andreas Stihl Ag & Co. Kg | Arbeitsgerät |
| DE102006000253A1 (de) * | 2006-05-30 | 2007-12-06 | Hilti Ag | Schlagende Handwerkzeugmaschine mit axial beweglich gelagertem Schlagwerk |
| DE102006000374A1 (de) * | 2006-07-27 | 2008-01-31 | Hilti Ag | Handwerkzeuggerät mit Entkopplungsanordnung |
| DE102006000375A1 (de) * | 2006-07-27 | 2008-01-31 | Hilti Ag | Handwerkzeuggerät mit Entkoppelungsanordnung |
| US7344172B1 (en) * | 2006-08-23 | 2008-03-18 | Jerome Bauman | Spring-loaded case hook |
| DE102007000093A1 (de) * | 2007-02-15 | 2008-08-21 | Hilti Ag | Handwerkzeuggerät |
| US7775890B2 (en) * | 2007-04-23 | 2010-08-17 | Caterpillar Inc | Flexible drivetrain having axial and radial motion limiter |
| DE102007000270A1 (de) | 2007-05-11 | 2008-11-20 | Hilti Aktiengesellschaft | Vibrierende Handwerkzeugmaschine mit Antivibrationselement |
| DE102007048887B4 (de) * | 2007-10-11 | 2017-10-26 | Andreas Stihl Ag & Co. Kg | Handgeführtes Arbeitsgerät |
| GB0801302D0 (en) * | 2008-01-24 | 2008-03-05 | Black & Decker Inc | Handle assembly for power tool |
| EP2119537A1 (de) * | 2008-05-17 | 2009-11-18 | Metabowerke GmbH | Elektrohandwerkzeuggerät |
| DE102009000363A1 (de) * | 2009-01-21 | 2010-07-22 | Hilti Aktiengesellschaft | Schlagwerk und Handwerkzeugmaschine |
| JP5361504B2 (ja) * | 2009-04-10 | 2013-12-04 | 株式会社マキタ | 打撃工具 |
| US8225913B2 (en) * | 2009-04-16 | 2012-07-24 | S & T Daewoo Co. Ltd. | Damper for continuously variably adjusting damping force |
| DE102009047106A1 (de) * | 2009-11-25 | 2011-05-26 | Robert Bosch Gmbh | Variation der Eigenfrequenz von Schwingungsmitteln in Elektrowerkzeugen |
| DE102011007433A1 (de) * | 2010-04-20 | 2011-12-08 | Robert Bosch Gmbh | Handwerkzeugmaschinenvorrichtung |
| DE102010055673A1 (de) * | 2010-12-22 | 2012-06-28 | Andreas Stihl Ag & Co. Kg | Handgeführtes Arbeitsgerät |
| DE102011017671A1 (de) * | 2011-04-28 | 2012-10-31 | Hilti Aktiengesellschaft | Handwerkzeugmaschine |
| ITFI20110143A1 (it) * | 2011-07-19 | 2013-01-20 | Nuovo Pignone Spa | A differential pressure valve with reduced spring-surge and method for reducing spring surge |
| ITFI20110145A1 (it) * | 2011-07-19 | 2013-01-20 | Nuovo Pignone Spa | A differential pressure valve with parallel biasing springs and method for reducing spring surge |
| US10232500B2 (en) * | 2012-12-17 | 2019-03-19 | Swerea Ivf Ab | Impact machine |
| EP2848370A1 (de) | 2013-09-12 | 2015-03-18 | HILTI Aktiengesellschaft | Handwerkzeugmaschine |
| EP2898994A1 (de) * | 2014-01-23 | 2015-07-29 | Black & Decker Inc. | Elektrowerkzeug mit hinterem Griff |
| WO2016138110A1 (en) * | 2015-02-24 | 2016-09-01 | Vibracoustic North America, L.P. | Jounce bumper |
| DE102017002094A1 (de) * | 2017-03-04 | 2018-09-06 | Andreas Stihl Ag & Co. Kg | Elektrisches Arbeitsgerät mit Vibrationsentkopplung |
-
2017
- 2017-12-19 EP EP17208325.5A patent/EP3501750A1/de not_active Withdrawn
-
2018
- 2018-11-21 WO PCT/EP2018/082028 patent/WO2019120837A1/de not_active Ceased
- 2018-11-21 US US16/757,737 patent/US11518017B2/en active Active
- 2018-11-21 EP EP18801003.7A patent/EP3727762B1/de active Active
Also Published As
| Publication number | Publication date |
|---|---|
| WO2019120837A1 (de) | 2019-06-27 |
| EP3727762B1 (de) | 2023-10-18 |
| US20210187721A1 (en) | 2021-06-24 |
| US11518017B2 (en) | 2022-12-06 |
| EP3501750A1 (de) | 2019-06-26 |
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