EP3023204A1 - Fermeture d'entraînement de machine-outil manuelle et machine-outil manuelle - Google Patents

Fermeture d'entraînement de machine-outil manuelle et machine-outil manuelle Download PDF

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Publication number
EP3023204A1
EP3023204A1 EP14194231.8A EP14194231A EP3023204A1 EP 3023204 A1 EP3023204 A1 EP 3023204A1 EP 14194231 A EP14194231 A EP 14194231A EP 3023204 A1 EP3023204 A1 EP 3023204A1
Authority
EP
European Patent Office
Prior art keywords
hand tool
closure
transmission
housing
base body
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.)
Withdrawn
Application number
EP14194231.8A
Other languages
German (de)
English (en)
Inventor
Oliver Ohlendorf
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.)
Hilti AG
Original Assignee
Hilti AG
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 Hilti AG filed Critical Hilti AG
Priority to EP14194231.8A priority Critical patent/EP3023204A1/fr
Priority to PCT/EP2015/077204 priority patent/WO2016079289A1/fr
Priority to CN201580063404.8A priority patent/CN107000195B/zh
Priority to EP15798073.1A priority patent/EP3221091B1/fr
Priority to US15/527,262 priority patent/US20170341214A1/en
Publication of EP3023204A1 publication Critical patent/EP3023204A1/fr
Withdrawn legal-status Critical Current

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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
    • B25F5/02—Construction of casings, bodies or handles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D9/00—Portable percussive tools with fluid-pressure drive, i.e. driven directly by fluids, e.g. having several percussive tool bits operated simultaneously
    • 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
    • B25D2250/185—Pressure equalising means between sealed chambers

Definitions

  • the present invention relates to a hand tool transmission closure with a base body for closing a transmission housing opening of a transmission housing of a hand tool machine, in particular a hammer drill or combi hammer.
  • the present invention also relates to a hand tool with a hand tool gear lock.
  • a percussion with a piston, connecting rod and an anvil can be arranged within the gear housing of a typical hand tool.
  • a lubricant in the transmission housing for example a transmission oil
  • the lubricant is introduced into the transmission housing via the transmission housing opening.
  • the gear housing opening is closed by a base body of a hand tool gearbox closure.
  • the main body may be formed as a plug.
  • the object is achieved in that the hand tool gearbox closure has an air duct, through which air can flow into and out of the gearbox channel and the hand tool gearbox closure has a pressure valve arranged in the air duct, via which an overpressure occurring in the gearbox housing is degradable.
  • a negative pressure occurring in the transmission housing can be compensated via the pressure valve.
  • air which is expanded due to the machine tool operation and especially by the heating of the lubricant in the transmission housing can now escape from the transmission housing.
  • the invention includes the recognition that by the closed design of a gear housing and its closure by means of a base body without air duct, the Internal pressure of a gear housing during operation of the machine tool to an undesirably high pressure level increases.
  • a high pressure level is detrimental to the life and in particular the work performance data, for example, the delivered impact energy of the power tool.
  • the hand tool closure according to the invention contributes to eliminating these disadvantages in which a transmission internal pressure can be regulated.
  • the pressure valve is disposed within the hand tool gearbox closure and may be formed as an elastic hose member.
  • a degradation of an overpressure occurring in the transmission housing is accompanied by an elastic deformation of the elastic hose element.
  • the designed as an elastic hose member pressure valve can be installed in the biased state in the hand tool gear lock.
  • the pressure valve designed as an elastic hose element is made of silicone.
  • the pressure valve may be designed so that it opens only when exceeding a predetermined pressure difference, for example 2 bar, between ambient pressure and transmission pressure. This is advantageous, for example, if the machine tool has an electropneumatic hammer mechanism for which a desired overpressure is desirable.
  • the hand tool gear lock has a cover part with ventilation openings.
  • the cover part preferably protrudes into the base body, wherein in particular the pressure valve designed as an elastic hose element is supported both against the base body and against the cover.
  • the hand tool transmission closure has an air-permeable and in particular substantially gear oil-tight sealing element.
  • the sealing element is preferably arranged in the air duct.
  • a lubricant especially oil
  • the lubricating power drops to the other pollutes the visible surface of the machine tool for the user.
  • an air-permeable and gear oil-tight sealing element can be done for a pressure equalization, on the other hand, an oil leakage is avoided from the transmission housing.
  • the sealing element consists of felt or at least felt.
  • the sealing element may consist of a dense textile fiber material. It has proved to be further advantageous if the sealing element at least is arranged in sections below the pressure valve when the hand tool gear lock is in its intended installation situation.
  • the base body and / or the cover part is rotationally symmetrical. In this way, a cost-effective production on a lathe is possible.
  • the ventilation openings are preferably arranged annularly on a surface of the cover part.
  • the base body has a trough-shaped section, which is preferably arranged opposite the cover part and further preferably projects into the transmission housing when the base body closes the gear housing opening.
  • the trough-shaped section of the main body may have an opening bore through which an amount of air can enter or exit the air duct.
  • the trough-shaped portion of the base body may be rotationally symmetrical.
  • the opening bore is formed as a through hole along a secant of the rotationally symmetrical trough-shaped portion of the base body.
  • the base body has a sealing ring, which is arranged to seal the base body circumferentially to the transmission housing opening.
  • the base body is designed as a plug.
  • a plug function of the main body can be effected, for example, by a sealing ring provided on the main body.
  • the main body can have lamellae, which are designed to hold the main body in a gear housing opening frictionally.
  • the object is achieved in that the hand tool machine has a prescribed hand tool gear lock.
  • FIG. 1 an inventive hand tool gear 10 is shown in different views. It shows Fig. 1a , Schematically, a side view of the rotationally symmetrical hand tool transmission closure 10 with a marked section line AA. Fig. 1b shows the section AA through the hand tool gear 10 according to the section line AA Fig. 1a , In Fig. 1c in turn, an exploded view of the hand tool gear 10 is shown.
  • the hand tool gear lock 10 in Fig. 1 has a base body 1 for closing a transmission housing opening 70 of a transmission housing 80.
  • the hand tool transmission closure 10 also has an air duct L through which an air mass (not shown) can flow into and out of the transmission housing for the purpose of pressure equalization.
  • a pressure valve 3 is arranged in the air channel L of the hand tool gearbox closure 10, via which an overpressure or underpressure located in the gearbox 80 is degradable.
  • the pressure valve 3 is disposed within the hand tool gear lock 10 and formed as an elastic hose member consisting of silicone.
  • the designed as an elastic hose member pressure valve 3 is arranged coaxially to the rotationally symmetrical base body 1 of the hand tool gear lock 10.
  • the hand tool transmission closure 10 has a cover part 2 which has a ventilation opening 2 'on its surface.
  • the ventilation opening 2 ' is not recognizable, it will be explained with reference to the other figures.
  • the pressure valve 3 designed as an elastic hose element is supported both against the base body 1 and against the cover part 2 and installed in the hand tool gear lock 10 in the prestressed state.
  • a sealing element 8 Coaxial with the pressure valve 3, a sealing element 8 is arranged, which in the present case consists of felt and is rotationally symmetrical.
  • the air-permeable and substantially gear oil-tight sealing element 8 is arranged on its lower side flush with the pressure valve 3.
  • a pressure equalization Through the air-permeable and gear oil-tight sealing element 8 can on the one hand a pressure equalization, on the other hand, an oil leakage, for example in the form of oil vapor, is avoided from the gear housing 80.
  • the hand tool gear lock 10 has a sealing ring 6, which is arranged to seal the base body 1 circumferentially to the gear housing opening 70 shown.
  • Fig. 2 shows the hand tool transmission closure 10 in the state that the pressure valve 3 assumes when transmission internal pressure DI and ambient pressure DU are substantially equal. This is the case, for example, if the hand tool was not in operation for a long time or during operation of the power tool when pressure equalization has already taken place.
  • the base body 1 has a trough-shaped section 1 ', in which an opening bore 1 "is arranged.
  • This opening bore 1" likewise forms an inlet for the air duct L of the hand tool transmission closure, the air duct L passing through the hand-held power transmission closure 10 as far as the ventilation opening 2'. extends in the lid part 2.
  • the prestressed in the hand tool gear 10 built-in and designed as an elastic hose member pressure valve 3 is pressed against a valve seat 3 ', which is part of the cover part 2 to the other part of the body 1.
  • FIG. 2 Due to the in Fig. 2 selected sectional view of the hand tool transmission closure 10, two of the ventilation openings 2 'of the cover part 2 can be seen.
  • Other ventilation openings 2 ', which are arranged annularly on the surface of the cover part, are for example Fig. 4 removable.
  • Fig. 3 now shows the same hand tool gear 10 as Fig. 2 , where in Fig. 3 the state is shown that the pressure valve 3 assumes when the transmission pressure DI exceeds the ambient pressure DU, ie in the transmission housing 80 there is an overpressure. This is the case, for example, when the percussion mechanism (not shown) has heated a lubricant located in the transmission housing 80.
  • the pressure valve 3 is designed such that it only opens when a predetermined pressure difference of 2 bar between ambient pressure DU and transmission pressure DI is exceeded in order to achieve a desired overpressure in the transmission housing 80, ie the pressure valve 3 opens only when the transmission pressure DI exceeds the ambient pressure DU exceeds by 2 bar.
  • the air duct L which extends through the hand tool transmission closure 10, explained in more detail.
  • the air channel L extends through the trough-shaped section 1 'of the base body 1 in the direction of the centrally arranged sealing element 8. From there, the air channel L branches into an annular channel section leading to the pressure valve 3
  • the pressure valve 3 is arranged inside the air duct L of the hand tool transmission closure 10.
  • the ventilation openings 2 'of the cover part 2 adjoin the pressure valve 3 and in turn form sections of the air channel L of the hand tool transmission closure 10. With ventilation openings 2' of the cover part 2, the air channel L ends.
  • FIG. 3 exemplified by a dashed line an air mass LM, which is due to the transmission internal pressure DI, which is greater than the ambient pressure DU moves in the direction of arrow through the air duct L hand tool gearbox closure 10 from the gear housing 80 out.
  • the air mass LM first passes through the opening bore 1 ", in order to pass through the airtight and substantially gear oil-tight sealing element 8. Lubricants or oil residues previously contained in the air mass LM are retained by the sealing element 8 and can not escape from the latter in the further course Hand tool gear lock 10 emerge.
  • the air mass LM moves in the direction of the formed as an elastic hose member pressure valve 3, this - it is installed in a prestressed state - is pressed under further elastic deformation to the outside of the body 1, so as in Fig. 3 shown lifted from the part of the valve seat 3 ', which is covered by the cover part 2.
  • the air mass LM corresponding to the arrow direction of the dashed line, can escape through the ventilation openings 2 'of the cover part 2 from the hand tool transmission closure 10.
  • the pressure valve 3 After pressure equalization, the pressure valve 3 returns to its in Fig. 2 shown starting position back.
  • Fig. 4 shows the hand tool gear 10 in a schematic and perspective view.
  • the opening hole 1 " is arranged, through which an air mass LM into the air duct L of the Hand tool transmission closure 10 (in the event of overpressure reduction) occur or (in the case of negative pressure compensation) can escape.
  • FIG Fig. 5 A hand tool 100 according to the invention with a hand tool gear lock 10 is shown in FIG Fig. 5 shown.
  • the hand tool 100 has a housing 90 which encloses a gear housing 80.
  • a striking mechanism 60 is arranged, which develops heat in the course of operation of the power tool 100.
  • a transmission housing opening 70 is arranged, which in the present case is closed by a hand tool transmission closure 10.
  • the hand tool gear lock 10 is covered by a swing plate 50.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Percussive Tools And Related Accessories (AREA)
EP14194231.8A 2014-11-21 2014-11-21 Fermeture d'entraînement de machine-outil manuelle et machine-outil manuelle Withdrawn EP3023204A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP14194231.8A EP3023204A1 (fr) 2014-11-21 2014-11-21 Fermeture d'entraînement de machine-outil manuelle et machine-outil manuelle
PCT/EP2015/077204 WO2016079289A1 (fr) 2014-11-21 2015-11-20 Moyen de fermeture de transmission d'outillage à main et machine-outil portative
CN201580063404.8A CN107000195B (zh) 2014-11-21 2015-11-20 手持工具传动器封闭装置和手持式工具机
EP15798073.1A EP3221091B1 (fr) 2014-11-21 2015-11-20 Fermeture d'entraînement de machine-outil manuelle et machine-outil manuelle
US15/527,262 US20170341214A1 (en) 2014-11-21 2015-11-20 Hand-held power tool gearbox closure and hand-held power tool

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP14194231.8A EP3023204A1 (fr) 2014-11-21 2014-11-21 Fermeture d'entraînement de machine-outil manuelle et machine-outil manuelle

Publications (1)

Publication Number Publication Date
EP3023204A1 true EP3023204A1 (fr) 2016-05-25

Family

ID=52000642

Family Applications (2)

Application Number Title Priority Date Filing Date
EP14194231.8A Withdrawn EP3023204A1 (fr) 2014-11-21 2014-11-21 Fermeture d'entraînement de machine-outil manuelle et machine-outil manuelle
EP15798073.1A Active EP3221091B1 (fr) 2014-11-21 2015-11-20 Fermeture d'entraînement de machine-outil manuelle et machine-outil manuelle

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP15798073.1A Active EP3221091B1 (fr) 2014-11-21 2015-11-20 Fermeture d'entraînement de machine-outil manuelle et machine-outil manuelle

Country Status (4)

Country Link
US (1) US20170341214A1 (fr)
EP (2) EP3023204A1 (fr)
CN (1) CN107000195B (fr)
WO (1) WO2016079289A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0133520A2 (fr) * 1983-08-11 1985-02-27 Jacob Berg GmbH & Co. KG Fermeture pour récipient avec moyens d'aération
EP0967157A1 (fr) * 1998-06-25 1999-12-29 Argo Sa Fermeture de dégazage semi-perméable
GB2380442A (en) * 2001-09-14 2003-04-09 Bosch Gmbh Robert A hand-held machine tool with pressure compensating device
US20070251913A1 (en) * 2006-04-28 2007-11-01 Silgan Plastics Corporation Container with venting closure assembly
EP2433755A1 (fr) * 2009-05-20 2012-03-28 Makita Corporation Outil motorisé

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2923306A (en) * 1957-01-07 1960-02-02 Thor Power Tool Co Pressure regulator valve mechanism for air tools
US3920088A (en) * 1973-11-23 1975-11-18 Thor Power Tool Co Power tool with continuous and pulsating torque output cycle
US4165816A (en) * 1978-04-10 1979-08-28 Dapco Industries Vent cap
EP0430958B1 (fr) * 1988-07-21 1993-10-13 ZF FRIEDRICHSHAFEN Aktiengesellschaft Dispositif d'egalisation de la pression entre le carter d'une machine et l'environnement
US4987740A (en) * 1989-04-03 1991-01-29 General Motors Corporation Assured venting master cylinder diaphragm apparatus and method
DE4224497A1 (de) * 1992-07-24 1994-01-27 Hilti Ag Mundstück für Auspressgeräte, die dem Abgeben von Zweikomponentenmassen dienen
DE4300441C1 (de) * 1993-01-09 1993-12-02 Inst Maschinenelemente Uni Stu Vorrichtung zum Ent- und Belüften von Maschinengehäusen
US5522769A (en) * 1994-11-17 1996-06-04 W. L. Gore & Associates, Inc. Gas-permeable, liquid-impermeable vent cover
JP3431497B2 (ja) * 1998-05-13 2003-07-28 株式会社マキタ 電動工具のシール機構
DE10145464C2 (de) * 2001-09-14 2003-08-28 Wacker Construction Equipment Bohr- und/oder Schlaghammer mit anpressdruckabhängiger Leerlaufsteuerung
DE102007000216B4 (de) * 2007-04-11 2022-10-27 Hilti Aktiengesellschaft Elektrische Hubsäge
US9878463B2 (en) * 2008-12-16 2018-01-30 Positec Power Tools (Suzhou) Co., Ltd Chain saw
EP3023354A1 (fr) * 2014-11-21 2016-05-25 HILTI Aktiengesellschaft Fermeture d'entraînement de machine-outil manuelle et machine-outil manuelle
US10371246B2 (en) * 2016-03-24 2019-08-06 Fca Us Llc Breather vent assembly for a vehicle transmission

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0133520A2 (fr) * 1983-08-11 1985-02-27 Jacob Berg GmbH & Co. KG Fermeture pour récipient avec moyens d'aération
EP0967157A1 (fr) * 1998-06-25 1999-12-29 Argo Sa Fermeture de dégazage semi-perméable
GB2380442A (en) * 2001-09-14 2003-04-09 Bosch Gmbh Robert A hand-held machine tool with pressure compensating device
US20070251913A1 (en) * 2006-04-28 2007-11-01 Silgan Plastics Corporation Container with venting closure assembly
EP2433755A1 (fr) * 2009-05-20 2012-03-28 Makita Corporation Outil motorisé

Also Published As

Publication number Publication date
CN107000195A (zh) 2017-08-01
EP3221091A1 (fr) 2017-09-27
EP3221091B1 (fr) 2022-07-13
US20170341214A1 (en) 2017-11-30
WO2016079289A1 (fr) 2016-05-26
CN107000195B (zh) 2020-02-21

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