EP1637288A1 - Outil à main électrique amortissant les vibrations - Google Patents
Outil à main électrique amortissant les vibrations Download PDFInfo
- Publication number
- EP1637288A1 EP1637288A1 EP05108553A EP05108553A EP1637288A1 EP 1637288 A1 EP1637288 A1 EP 1637288A1 EP 05108553 A EP05108553 A EP 05108553A EP 05108553 A EP05108553 A EP 05108553A EP 1637288 A1 EP1637288 A1 EP 1637288A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- hand tool
- electric hand
- outer housing
- rigid
- elastic portion
- 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
- 238000013016 damping Methods 0.000 title description 2
- 229920001971 elastomer Polymers 0.000 claims abstract description 5
- 239000000806 elastomer Substances 0.000 claims abstract description 4
- 238000001816 cooling Methods 0.000 claims description 26
- 238000009527 percussion Methods 0.000 claims description 15
- 238000009423 ventilation Methods 0.000 claims description 2
- 210000003027 ear inner Anatomy 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Images
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
- B25F5/008—Cooling 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
- B25D17/20—Devices for cleaning or cooling tool or work
-
- 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
- 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
- B25D2217/00—Details of, or accessories for, portable power-driven percussive tools
- B25D2217/0057—Details related to cleaning or cooling the tool or workpiece
- B25D2217/0061—Details related to cleaning or cooling the tool or workpiece related to cooling
-
- 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
-
- 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
- B25D2250/065—Details regarding assembling of the tool
-
- 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
- B25D2250/085—Elastic behaviour of tool components
-
- 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
- B25D2250/091—Electrically-powered tool components
- B25D2250/095—Electric motors
-
- 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 invention relates to an electric hand tool with an at least partially striking percussion in a percussion unit, which is vibration-damped in an outer housing, referred to in the preamble of claim 1.
- a cooling fan for. B. sucked by the engine fan, cooling air via suction air openings in the outer housing of the electric hand tool, passed over the engine and the striking mechanism and then blown through outlet air openings in the outer housing. Labyrinths within the outer housing separate the intake area and the blow-out area.
- a vibration-damped electric hand tool in which the percussion unit is movably mounted with the at least partially striking percussion mechanism within the outer housing, a complete sealing of the suction area of the discharge area with labyrinths is almost impossible. Due to the resulting air short circuit within the electric hand tool, the cooling performance deteriorates due to the preheated circulating air and the efficiency of the electric hand tool is reduced.
- an electric hand tool with an at least partially impacting electro-pneumatic percussion mechanism in a striking mechanism assembly is known, which is capable of vibration-damping movement in an outer housing.
- the outer housing has suction ventilation openings for a cooling fan and at least one cooling air line to the cooling fan is arranged on the striking mechanism assembly.
- This electric hand tool has a good efficiency, since an air short circuit between the intake and the blow-out is largely prevented.
- a disadvantage of the known solution is that a small proportion of the sucked cooling air circulate within the outer housing and moisture, z. B. when using the electric hand tool in the rain, can penetrate into the outer housing, which is not removed by the air flow again from the electrical appliance. The penetrating moisture can cause damage to the electrical system or electronics, for example.
- the object of the invention is to provide an electric hand tool with a vibration-damped percussion unit, which has an optimal cooling air flow, so that an air short circuit between the intake and the blow-out avoided and the penetration of moisture in the outer casing is largely prevented.
- the cooling air duct has at least one rigid section and one elastic section.
- the at least one rigid section of the cooling air duct is arranged, for example, on the striking mechanism group, wherein the elastic section connects the suction air openings in the outer housing with the rigid section.
- the suction area in which there is a negative pressure, from the blow-out area, in which pressure prevails, completely sealed.
- no air short circuit can occur, with which the device has a much better efficiency and the cooling performance is improved, and on the other hand, penetrating moisture is completely removed from the air flow from the outer housing.
- the dimensions, in particular the maximum longitudinal extension, and the formation of the elastic portion are chosen such that upon movement of the movable percussion group within the outer housing of up to 15 mm no tensile forces act on the elastic portion.
- the exhaust air is advantageously blown by the fan from the engine in an optimally designed space without bottlenecks before it passes through the outlet air openings to the outside. Due to the targeted air flow in the blow-out area, sufficient heat is still dissipated from the percussion mechanism and the gearbox despite the cooling air preheated by the engine.
- the rigid section of the cooling air duct is arranged in the region of the intake air openings on the outer housing, wherein the elastic section connects the rigid section with the striking mechanism group.
- the cooling air line preferably has a first rigid section arranged on the outer housing and a second, rigid section arranged on the striking mechanism subassembly.
- the elastic portion is disposed between the first and second rigid portions. This allows the arrangement of the elastic portion within a portion of the outer case in which there is a sufficiently large space for the elastic portion.
- the elastic portion is formed as a bellows, whereby the elastic portion can optimally perform its function of balancing the movements of the percussion group and is designed to save space.
- the elastic portion is formed, for example, as a sleeve.
- the elastic portion is made of an elastomer.
- the elastic portion is made of a suitable rubber.
- FIGURE shows the inventive electric hand tool in a partial section.
- the illustrated electric hand tool 1 has an at least partially striking, electro-pneumatic impact mechanism 2, which is integrated in a percussion group 3.
- the percussion group 3 further comprises a motor 4 and a gear 5 and is mounted vibration-damped in the outer housing 6 movable.
- a cooling air line 11 is arranged, which, starting from the intake air openings 7 in the outer housing 6 cooling air to the cooling fan 8, in the form of a fan, leads.
- the cooling air duct 11 has a first, rigid section 12, which is arranged on the outer housing 6 in the region of the intake air openings 7, and a second, rigid section 13, which is arranged on the striking mechanism group 3.
- the first rigid portion 12 is connected to the second rigid portion 13 via an elastic portion 14 in the form of a bellows made of an elastomer.
- the air flow 21 of the cooling air generated by the cooling fan 8 is sucked through the suction air openings 7 in the outer housing 6 through the cooling air line 11, passed through the motor 4 and then past the gear 5 and the percussion mechanism 2 through the outlet air openings 9 in the outer housing 6 is blown out.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Percussive Tools And Related Accessories (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102004044822 | 2004-09-16 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1637288A1 true EP1637288A1 (fr) | 2006-03-22 |
EP1637288B1 EP1637288B1 (fr) | 2014-08-13 |
Family
ID=35448091
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20050108553 Active EP1637288B1 (fr) | 2004-09-16 | 2005-09-16 | Outil à main électrique amortissant les vibrations |
Country Status (1)
Country | Link |
---|---|
EP (1) | EP1637288B1 (fr) |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102006038756A1 (de) * | 2006-08-17 | 2008-02-21 | Marquardt Gmbh | Elektrogerät, insbesondere in der Art eines Elektrohandwerkzeugs |
EP1958735A1 (fr) * | 2007-02-15 | 2008-08-20 | HILTI Aktiengesellschaft | Machine-outil |
DE102007043916A1 (de) * | 2007-09-14 | 2009-04-02 | Robert Bosch Gmbh | Elektrohandwerkzeugmaschine |
EP2105261A1 (fr) * | 2008-03-27 | 2009-09-30 | AEG Electric Tools GmbH | Outil électrique, en particulier marteau perforateur et/ou burineur |
EP2251152A1 (fr) * | 2009-05-11 | 2010-11-17 | Robert Bosch GmbH | Machine-outil, notamment machine-outil électrique |
EP2404708A3 (fr) * | 2010-06-15 | 2013-01-16 | HILTI Aktiengesellschaft | Dispositif d'enfoncement manuel |
EP2653024A1 (fr) * | 2012-04-16 | 2013-10-23 | Andreas Stihl AG & Co. KG | Appareil de travail |
EP2149432A3 (fr) * | 2008-07-30 | 2014-07-02 | Hitachi Koki CO., LTD. | Outil électrique |
EP2923801A1 (fr) * | 2014-03-24 | 2015-09-30 | Makita Corporation | Outil d'impact |
EP4037161A1 (fr) * | 2021-02-02 | 2022-08-03 | Andreas Stihl AG & Co. KG | Appareil de travail à tige portable |
EP4282595A1 (fr) | 2022-05-23 | 2023-11-29 | Black & Decker, Inc. | Outil électrique |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2019079560A1 (fr) | 2017-10-20 | 2019-04-25 | Milwaukee Electric Tool Corporation | Outil à percussion |
WO2019147919A1 (fr) | 2018-01-26 | 2019-08-01 | Milwaukee Electric Tool Corporation | Outil à percussion |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5322131A (en) * | 1993-05-20 | 1994-06-21 | Chicago Pneumatic Tool Company | Vibration-reduced pneumatic tool |
DE19626254A1 (de) * | 1996-06-29 | 1998-01-08 | Bosch Gmbh Robert | Elektrohandwerkzeugmaschine |
DE19833126A1 (de) * | 1998-07-23 | 2000-01-27 | Stihl Maschf Andreas | Handgeführtes Arbeitsgerät |
US6043575A (en) * | 1999-03-05 | 2000-03-28 | Snap-On Tools Company | Power tool with air deflector for venting motor exhaust air |
US6314922B1 (en) * | 1998-07-23 | 2001-11-13 | Andreas Stihl Ag & Co. | Hand-held working tool |
EP1302281A1 (fr) | 2001-10-15 | 2003-04-16 | HILTI Aktiengesellschaft | Conduit d'air de refroidissement d'un outil de percussion |
WO2004026534A1 (fr) * | 2002-09-20 | 2004-04-01 | Snap-On Incorporated | Outil electrique a cloisonnement de l'air et amortissement des vibrations |
-
2005
- 2005-09-16 EP EP20050108553 patent/EP1637288B1/fr active Active
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5322131A (en) * | 1993-05-20 | 1994-06-21 | Chicago Pneumatic Tool Company | Vibration-reduced pneumatic tool |
DE19626254A1 (de) * | 1996-06-29 | 1998-01-08 | Bosch Gmbh Robert | Elektrohandwerkzeugmaschine |
DE19833126A1 (de) * | 1998-07-23 | 2000-01-27 | Stihl Maschf Andreas | Handgeführtes Arbeitsgerät |
US6314922B1 (en) * | 1998-07-23 | 2001-11-13 | Andreas Stihl Ag & Co. | Hand-held working tool |
US6043575A (en) * | 1999-03-05 | 2000-03-28 | Snap-On Tools Company | Power tool with air deflector for venting motor exhaust air |
EP1302281A1 (fr) | 2001-10-15 | 2003-04-16 | HILTI Aktiengesellschaft | Conduit d'air de refroidissement d'un outil de percussion |
WO2004026534A1 (fr) * | 2002-09-20 | 2004-04-01 | Snap-On Incorporated | Outil electrique a cloisonnement de l'air et amortissement des vibrations |
Cited By (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102006038756A1 (de) * | 2006-08-17 | 2008-02-21 | Marquardt Gmbh | Elektrogerät, insbesondere in der Art eines Elektrohandwerkzeugs |
EP1958735A1 (fr) * | 2007-02-15 | 2008-08-20 | HILTI Aktiengesellschaft | Machine-outil |
US8443912B2 (en) | 2007-02-15 | 2013-05-21 | Hilti Aktiengesellschaft | Hand-held power tool |
DE102007043916A1 (de) * | 2007-09-14 | 2009-04-02 | Robert Bosch Gmbh | Elektrohandwerkzeugmaschine |
EP2105261A1 (fr) * | 2008-03-27 | 2009-09-30 | AEG Electric Tools GmbH | Outil électrique, en particulier marteau perforateur et/ou burineur |
EP2149432A3 (fr) * | 2008-07-30 | 2014-07-02 | Hitachi Koki CO., LTD. | Outil électrique |
EP2251152A1 (fr) * | 2009-05-11 | 2010-11-17 | Robert Bosch GmbH | Machine-outil, notamment machine-outil électrique |
EP2404708A3 (fr) * | 2010-06-15 | 2013-01-16 | HILTI Aktiengesellschaft | Dispositif d'enfoncement manuel |
CN103372854A (zh) * | 2012-04-16 | 2013-10-30 | 安德烈亚斯.斯蒂尔两合公司 | 工作器械 |
EP2653024A1 (fr) * | 2012-04-16 | 2013-10-23 | Andreas Stihl AG & Co. KG | Appareil de travail |
US9379596B2 (en) | 2012-04-16 | 2016-06-28 | Andreas Stihl Ag & Co. Kg | Work apparatus |
EP2923801A1 (fr) * | 2014-03-24 | 2015-09-30 | Makita Corporation | Outil d'impact |
JP2015182167A (ja) * | 2014-03-24 | 2015-10-22 | 株式会社マキタ | 打撃工具 |
US9950415B2 (en) | 2014-03-24 | 2018-04-24 | Makita Corporation | Impact tool |
CN104942763B (zh) * | 2014-03-24 | 2019-06-21 | 株式会社牧田 | 冲击工具 |
EP4037161A1 (fr) * | 2021-02-02 | 2022-08-03 | Andreas Stihl AG & Co. KG | Appareil de travail à tige portable |
EP4282595A1 (fr) | 2022-05-23 | 2023-11-29 | Black & Decker, Inc. | Outil électrique |
Also Published As
Publication number | Publication date |
---|---|
EP1637288B1 (fr) | 2014-08-13 |
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