EP3221230B1 - 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
EP3221230B1
EP3221230B1 EP15798069.9A EP15798069A EP3221230B1 EP 3221230 B1 EP3221230 B1 EP 3221230B1 EP 15798069 A EP15798069 A EP 15798069A EP 3221230 B1 EP3221230 B1 EP 3221230B1
Authority
EP
European Patent Office
Prior art keywords
hand tool
gear
base body
closure
tube
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.)
Active
Application number
EP15798069.9A
Other languages
German (de)
English (en)
Other versions
EP3221230A1 (fr
Inventor
Oliver Ohlendorf
Matthias Keith
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
Publication of EP3221230A1 publication Critical patent/EP3221230A1/fr
Application granted granted Critical
Publication of EP3221230B1 publication Critical patent/EP3221230B1/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
    • B25F5/02—Construction of casings, bodies or handles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D11/00—Portable percussive tools with electromotor or other motor drive
    • B25D11/06—Means for driving the impulse member
    • B25D11/12—Means for driving the impulse member comprising a crank mechanism
    • 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
    • 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
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D51/00—Closures not otherwise provided for
    • B65D51/16—Closures not otherwise provided for with means for venting air or gas
    • B65D51/1605—Closures not otherwise provided for with means for venting air or gas whereby the interior of the container is maintained in permanent gaseous communication with the exterior
    • B65D51/1611—Closures not otherwise provided for with means for venting air or gas whereby the interior of the container is maintained in permanent gaseous communication with the exterior by means of an orifice, capillary or labyrinth passage
    • 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
    • B25D2250/121—Housing details

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 a tube protruding from the base body, which runs in the gearbox housing when the base body closes the gearbox housing opening.
  • the hand tool gearbox closure has an air channel which runs in a first air duct section through the base body and in a second air duct section through the tube, so that an air mass can flow through the air duct into and out of the gearbox housing.
  • an air mass which is expanded due to the machine tool operation and especially by heating the lubricant located in the transmission housing, now escape from the transmission housing.
  • an undesired escape of the lubricant from the transmission housing is avoided.
  • the invention includes the recognition that a lubricant, in particular oil, must not escape from a transmission housing, since otherwise the lubricating capacity drops, on the one hand, and, on the other hand, contaminates the surface of the machine tool that is visible to the user.
  • the invention also includes the recognition that increases by the closed design of a gear housing and its closure by means of a body without air duct, the internal pressure of a transmission housing during operation of the machine tool to an undesirably high pressure level.
  • 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.
  • the tube has an inner diameter between 0.2 and 0.8 mm.
  • the inside diameter can be between 0.4 and 0.6 mm. It has proved to be particularly advantageous if the inner diameter of the tube is 0.5 mm.
  • the tube is made of metal.
  • the tube may be made of a temperature resistant plastic or the like.
  • the tube protrudes from the body in such a way that it ends in the vicinity of a percussion mechanism arranged in the gear housing when the body closes the gear housing opening.
  • the tube ends near a connecting rod of the striking mechanism.
  • the tube may protrude from the body so that it reaches up to the axis of movement of the connecting rod, without interfering with the range of movement of the connecting rod, i. especially without coming into contact with the connecting rod.
  • the tube is dimensioned in such a way, in particular with regard to length, inner diameter and / or Abragwinkel of the body that a capillary increase of lubricant is avoided within the tube.
  • a typical gear oil having a viscosity of 5-20 mm 2 / s at 100 ° C, a density between 850 kg / m 3 to 900 kg / m 3 at 20 ° C and a surface tension of 20 - 30 N / m at 100 ° C, so is the preferred Inner diameter of the tube of 0.5 mm already sufficiently large to prevent adverse capillary increase of the gear oil in the tube.
  • the hand tool gear lock has a pressure valve arranged in the first air duct section.
  • About the pressure valve occurring in the transmission housing pressure can be degraded.
  • a negative pressure occurring in the transmission housing can be compensated via the pressure valve.
  • the pressure valve may be formed as a plate-shaped membrane with a central opening, which is preferably arranged on a pin, in particular on a centrally arranged pin of the base body.
  • the plate-shaped membrane may be made of an elastomeric material, a rubber, or other elastically deformable material, or at least have such.
  • 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 base body has an annular pressure distribution chamber which is closed by the pressure valve designed as a plate-shaped diaphragm, in particular when the transmission internal pressure and the ambient pressure (air pressure outside the transmission housing) are substantially equal.
  • 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.
  • a hand tool gear lock 10 in Fig. 1 has a base body 1, which is provided for closing a transmission housing opening, not shown.
  • the hand tool gear lock 10 has a protruding from the base body 1 tube 2, which is provided in the present case as a metal tube.
  • the hand tool transmission closure 10 has an air channel, which is formed by a first air duct section L1, which runs through the base body 1, and by a second air duct section L2, which extends through the tube 2. Through this air channel formed by the air duct sections L1, L2, an air mass LM can flow into and out of the transmission housing, not shown.
  • the tube 2 has an inner diameter D of 0.5 mm. Since the tube 2 protrudes from the underside of the main body 1, the tube 2 extends within a transmission housing when the main body 1 closes a transmission housing opening.
  • a sealing ring 6 is arranged, which in the present case consists of an elastically deformable rubber.
  • the hand tool transmission closure 10 has a pressure valve 3 which is arranged in the first air duct section L1 and which in the present case is designed as a plate-shaped membrane with a central opening 3 '.
  • the designed as a plate-shaped diaphragm pressure valve 3 is arranged on a central pin 4 of the base body 1.
  • the main body 1 has an annular pressure distribution chamber 5, which is closed by the pressure valve 3 designed as a plate-shaped membrane.
  • an air mass LM can escape from the transmission housing, which is illustrated by the dashed line pointing away from the main body 1 with arrow. Furthermore, an air mass LM can pass from the transmission environment into the transmission housing, not shown, via the pressure valve 3, which is indicated by the dashed line pointing in the direction of the tube 2 with an arrow.
  • the pressure regulating function of the pressure valve 3 will be described with reference to FIGS 4 to 6 explained in more detail below.
  • Fig. 2 shows the hand tool gear 10, which closes a gear housing opening 70 of a gear housing 80.
  • the base body 1 of the hand tool transmission closure 10 is held by a circumferentially extending sealing ring 6 in the gear housing opening 70 and held by a arranged below a swing plate 50 leaf spring 40 in its position.
  • the tube 2 protrudes from the base body 1 in such a way that the tube 2 ends in the vicinity of a connecting rod 30 of the striking mechanism 60. More specifically, stands out the tube 2 in such a way from the base body 1 that it reaches up to the axis of movement A of the connecting rod 30, without interfering with the range of movement of the connecting rod 30, that is, in particular without coming into contact with the connecting rod 30 - regardless of a respective Pleuellage.
  • an air exchange of the gear housing 80 is achieved without a lubricant can escape from selbigem.
  • Fig. 3 shows the hand tool gear 10 with the base body 2 and the bottom projecting tube 2, wherein in Fig. 3 a rear view of the hand tool transmission closure 10 is shown (viewing direction from the right with respect to Fig. 2 Marked in Fig. 3 is a section AA, whose section AA below with reference to Fig. 4 is explained in more detail.
  • the in Fig. 4 Section AA shows the hand tool transmission closure 10 in its state when transmission internal pressure DI within the transmission housing 80 and ambient pressure DU outside the transmission housing 80 are substantially equal. Trained as a plate-shaped diaphragm pressure valve 3 rests on the pin 4 of the body 1 in undeflected state. There is no exchange of air via the first and second air duct section L1, L2 and the pressure valve 3 instead. 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.
  • Fig. 5 shows the state of the hand tool transmission closure 10 when the transmission internal pressure DI exceeds the ambient pressure DU, ie there is an overpressure in the transmission housing. This is the case, for example, when the percussion mechanism has heated a lubricant in the transmission housing.
  • An air mass LM flows according to the dashed arrow into the protruding from the base body 1 tube 2 and moves along the air duct section L2 defined by the tube 2 in the direction of the body 1. From there, the air mass LM passes according to the dashed arrow direction in the pressure distribution 5, wherein the pressure distribution chamber 5 is arranged in the first air passage portion L1 of the base body 1.
  • the pressure valve 3 By means of an elastic deflection of the pressure valve 3 provided as a plate-shaped membrane, the air mass LM on the upper side of the main body 1 can escape therefrom.
  • the pressure valve 3 designed as a plate-shaped diaphragm is lifted off by a first valve seat 1 'situated on the outer circumference of the main body 1. After pressure equalization, the pressure valve 3 returns to its in Fig. 4 shown starting position back.
  • Fig. 6 now shows the state of the hand tool transmission closure 10 when the transmission internal pressure DI falls below the ambient pressure DU, ie, there is a negative pressure in the transmission housing 80. This is for example the case when the percussion cools down after a tool operation.
  • An air mass LM indicated by the dashed arrow can flow into the annular pressure distribution chamber 5 on the upper side of the main body 1 via the pressure valve 3 designed as a plate-shaped membrane.
  • the pressure valve 3 designed as a plate-shaped diaphragm is lifted off a second valve seat 1 "located on the central pin 4 of the main body 1.
  • the air mass LM flows along the first air duct section L1 continues through the main body 1 until it reaches the air duct section L2 of the tube 2 protruding from the main body 1, to emerge from the tube 2 at the end thereof, as illustrated by the dashed arrow 2.
  • the pressure valve 3 After pressure equalization has taken place, the pressure valve 3 returns to its in Fig. 4 shown starting position back.
  • FIG Fig. 7 A hand tool 100 according to the invention is shown in FIG Fig. 7 shown.
  • This has a tool housing 90 which encloses a transmission housing 80.
  • a percussion 60 is arranged with a connecting rod 30.
  • the hand tool gear lock 10 is arranged in a gear housing opening 70 and is covered on the upper side by a swing plate 50 of the power tool 100.
  • the tube 2 protruding from the base body 1 of the hand tool transmission closure 10 terminates in the vicinity of the connecting rod 30 of the percussion mechanism 60. Tubes 2 protruding from the base body 1 prevent undesired escape of the lubricant from the transmission housing 80.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Percussive Tools And Related Accessories (AREA)

Claims (10)

  1. Obturateur de transmission d'outil manuel (10) comportant un corps principal (1) pour obturer une ouverture de carter de transmission (70) d'un carter de transmission (80) d'une machine-outil manuelle (100), en particulier d'un marteau perforateur ou d'un perforateur-burineur,
    caractérisé en ce que l'obturateur de transmission d'outil manuel (10) comporte un petit tube (2) faisant saillie à partir du corps principal (1), lequel petit tube s'étend dans le carter de transmission (80) lorsque le corps principal (1) obture l'ouverture de carter de transmission (70), dans lequel l'obturateur de transmission d'outil manuel (10) comporte un canal d'air (L1, L2) qui s'étend dans une première partie de canal d'air (L1) à travers le corps principal (1) et dans une seconde partie de canal d'air (L2) à travers le petit tube (2), de telle sorte qu'une masse d'air (LM) peut s'écouler à travers le canal d'air (L1, L2) dans le carter de transmission (80) et à partir de celui-ci.
  2. Obturateur de transmission d'outil manuel (10) selon la revendication 1,
    caractérisé en ce que le petit tube (2) a un diamètre intérieur (D) compris entre 0,2 et 0,8 mm, de préférence égal à 0,5 mm.
  3. Obturateur de transmission d'outil manuel (10) selon la revendication 1 ou 2,
    caractérisé en ce que le petit tube (2) fait saillie à partir du corps principal (1) de telle sorte qu'il se termine à proximité d'un mécanisme de percussion (60) agencé dans le carter de transmission (80), en particulier à proximité d'une bielle (30) du mécanisme de percussion (60), lorsque le corps principal (1) obture l'ouverture de carter de transmission (70).
  4. Obturateur de transmission d'outil manuel (10) selon l'une des revendications précédentes,
    caractérisé en ce que l'obturateur de transmission d'outil manuel (10) comporte une soupape de pression (3) agencée dans la première partie de canal d'air (L1), par l'intermédiaire de laquelle une surpression apparaissant dans le carter de transmission (80) peut être réduite.
  5. Obturateur de transmission d'outil manuel (10) selon la revendication 4,
    caractérisé en ce qu'une surpression apparaissant dans le carter de transmission (80) peut être compensée par l'intermédiaire de la soupape de pression (3).
  6. Obturateur de transmission d'outil manuel (10) selon la revendication 4 ou 5,
    caractérisé en ce que la soupape de pression (3) est formée comme une membrane en forme d'assiette avec une ouverture centrale (3') qui est agencée sur un tourillon (4) du corps principal (1).
  7. Obturateur de transmission d'outil manuel (10) selon la revendication 6,
    caractérisé en ce que le corps principal (1) comporte une chambre de répartition de pression annulaire (5) qui est obturée par la soupape de pression (3) formée comme une membrane en forme d'assiette, lorsque la pression interne de la transmission (DI) et la pression ambiante (DU) sont sensiblement identiques.
  8. Obturateur de transmission d'outil manuel (10) selon l'une des revendications précédentes,
    caractérisé en ce que le corps principal (1) comporte une bague d'étanchéité (6) qui est agencée de manière à étanchéifier le corps principal (1) sur la périphérie de l'ouverture de carter de transmission (70).
  9. Obturateur de transmission d'outil manuel (10) selon l'une des revendications précédentes,
    caractérisé en ce que le corps principal (1) est formé comme un bouchon.
  10. Machine-outil manuelle (100), en particulier un marteau perforateur ou un perforateur-burineur, comportant un carter de transmission (80) entouré d'un boîtier d'outil (90), lequel carter de transmission est accessible par une ouverture de carter de transmission (70) ,
    caractérisée en ce que la machine-outil manuelle (100) comporte un obturateur de transmission d'outil manuel (10) selon l'une des revendications précédentes.
EP15798069.9A 2014-11-21 2015-11-20 Fermeture d'entraînement de machine-outil manuelle et machine-outil manuelle Active EP3221230B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP14194224.3A EP3023354A1 (fr) 2014-11-21 2014-11-21 Fermeture d'entraînement de machine-outil manuelle et machine-outil manuelle
PCT/EP2015/077192 WO2016079284A1 (fr) 2014-11-21 2015-11-20 Moyen de fermeture de transmission d'outillage à main et machine-outil portative

Publications (2)

Publication Number Publication Date
EP3221230A1 EP3221230A1 (fr) 2017-09-27
EP3221230B1 true EP3221230B1 (fr) 2018-10-24

Family

ID=52000641

Family Applications (2)

Application Number Title Priority Date Filing Date
EP14194224.3A Withdrawn EP3023354A1 (fr) 2014-11-21 2014-11-21 Fermeture d'entraînement de machine-outil manuelle et machine-outil manuelle
EP15798069.9A Active EP3221230B1 (fr) 2014-11-21 2015-11-20 Fermeture d'entraînement de machine-outil manuelle et machine-outil manuelle

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP14194224.3A Withdrawn EP3023354A1 (fr) 2014-11-21 2014-11-21 Fermeture d'entraînement de machine-outil manuelle et machine-outil manuelle

Country Status (4)

Country Link
US (1) US10562171B2 (fr)
EP (2) EP3023354A1 (fr)
CN (1) CN107000196B (fr)
WO (1) WO2016079284A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3023204A1 (fr) * 2014-11-21 2016-05-25 HILTI Aktiengesellschaft Fermeture d'entraînement de machine-outil manuelle et machine-outil manuelle
EP4039414A1 (fr) * 2021-02-09 2022-08-10 Hilti Aktiengesellschaft Mécanisme à percussion électropneumatique

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DE3328953A1 (de) 1983-08-11 1985-02-21 Jacob Berg Kg, 6501 Budenheim Behaelterverschluss zum be- oder entlueften eines behaelters
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JP5536813B2 (ja) 2012-02-22 2014-07-02 富士重工業株式会社 ブリーザ装置
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Also Published As

Publication number Publication date
US20170334057A1 (en) 2017-11-23
EP3023354A1 (fr) 2016-05-25
CN107000196B (zh) 2021-05-11
US10562171B2 (en) 2020-02-18
CN107000196A (zh) 2017-08-01
EP3221230A1 (fr) 2017-09-27
WO2016079284A1 (fr) 2016-05-26

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