EP2521634A1 - Système de machine-outil à main - Google Patents

Système de machine-outil à main

Info

Publication number
EP2521634A1
EP2521634A1 EP10787345A EP10787345A EP2521634A1 EP 2521634 A1 EP2521634 A1 EP 2521634A1 EP 10787345 A EP10787345 A EP 10787345A EP 10787345 A EP10787345 A EP 10787345A EP 2521634 A1 EP2521634 A1 EP 2521634A1
Authority
EP
European Patent Office
Prior art keywords
sealing
bearing unit
drive shaft
hand
power 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
EP10787345A
Other languages
German (de)
English (en)
Other versions
EP2521634B1 (fr
Inventor
Joachim Schadow
Sinisa Andrasic
Marcus Schuller
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
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP2521634A1 publication Critical patent/EP2521634A1/fr
Application granted granted Critical
Publication of EP2521634B1 publication Critical patent/EP2521634B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B21/00—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B23/00—Details of, or accessories for, spanners, wrenches, screwdrivers
    • B25B23/14—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers

Definitions

  • the invention is based on a handheld power tool device according to the preamble of claim 1.
  • the invention is based on a handheld power tool device having at least one drive shaft, a drive motor, an insert tool attachment and at least one bearing unit, which is provided for supporting the drive shaft on a side of the drive motor facing away from the attachment tool attachment, with a sealing device provided for this purpose to seal at least one axially adjacent to the bearing unit area, which is arranged on a side facing away from the werkschwfest Trent the bearing unit.
  • the sealing device has at least one sealing element which is formed separately from the bearing unit.
  • Drive shaft is to be understood in particular as meaning a shaft which directly or indirectly transmits an energy applied by the drive motor to the tool attachment during operation and is preferably connected directly to a rotor of the drive motor. which provides movement during operation that directly or indirectly moves the insert tool attachment.
  • a “tool attachment” is to be understood in particular as meaning a device which is intended to fasten an insert tool, in particular detachable without tools, directly below a “bearing unit” is a ball bearing, a sliding bearing, a roller bearing and / or another, the Professional understood to be reasonable bearing.
  • sealing device is to be understood in particular as a device which prevents dust, dirt and / or moisture from penetrating into a sealed area.
  • a “sealing element” is to be understood in particular an element which achieves a sealing effect preferably in a space between relatively moving objects by a spatial arrangement and / or a spatial extent, and in particular an element which seals between the drive shaft and another component
  • the sealing device seals the area according to DIN EN 60529 (VDE 0470-1) at least according to protection class IP 5X, advantageously at least IP 54, particularly advantageously at least IP 67
  • the sealing device is designed as a contact seal
  • the sealing device could be designed as a contactless seal
  • the sealing device is designed as a shaft seal and in particular seals axially along the drive shaft
  • the bearing unit and the sealing element are each on one of two different planes, which are aligned perpendicular to a rotational axis of the drive shaft.
  • the bearing unit and the sealing element in the axial direction of the drive shaft are arranged at least 0.2 mm everywhere, advantageously at least 1 mm apart from each other.
  • Embodiment of the hand tool device can be a particularly good room sealed with fine dusts and moisture for sensitive electronics, such as a speed, vibration, incline, acceleration, and / or temperature sensor, and / or other electronics.
  • sensitive electronics such as a speed, vibration, incline, acceleration, and / or temperature sensor, and / or other electronics.
  • the sealing device has at least two sealing elements.
  • the sealing element has an elastically deformable material, such as, in particular, plastic, felt with or without impregnation, elastomer, a gaseous element, a liquid element and / or another element that appears appropriate to a person skilled in the art.
  • the sealing element and / or the other region of the sealing device could at least partially consist of metal.
  • the two sealing elements are arranged on different sides of the bearing unit.
  • the sealing elements are arranged in the axial direction in front of and behind the bearing unit and in particular are arranged coaxially to the bearing unit, whereby a particularly effective seal can be achieved.
  • the bearing unit has at least one sealing element, that is, the bearing unit and the sealing element form an independent assembly in a separate from the rotational axis mounting state.
  • the sealing element of the bearing unit is arranged at least partially within an outer bearing ring in an axial region spanned by the bearing unit.
  • the sealing device has a sealing lip.
  • a “sealing lip” is to be understood in particular to mean an element that, in at least one operating state, is supported by a force that is advantageously antiparallel to a main extension of the sealing lip is aligned, is preferably pressed at one end against a sealing surface and / or a sealing edge, and in particular is elastically deflected.
  • the sealing lip preferably has an extension ratio between the main extension and an extension transverse to the main extension of at least 2/1, advantageously at least 4/1.
  • the sealing lip structurally simple, a particularly efficient and particularly low-friction seal can be achieved.
  • the sealing lip structurally simple, a particularly efficient and particularly low-friction seal can be achieved.
  • Sealing lip is biased in at least one operating condition, whereby a particularly reliable seal can be achieved.
  • Prestressed is to be understood in particular that the sealing lip presses in a mounted operating state with a force on the sealing surface and / or the sealing edge, so that the sealing lip by a counterforce against an unloaded state at least one location by at least 200 ⁇ , preferably is deformed by at least 500 ⁇ .
  • the sealing device has a sealing ring.
  • a “sealing ring” is to be understood in particular as meaning an element which is intended to be deformed without swiveling and is in particular o-ring-shaped
  • a “labyrinth seal” is to be understood in particular as meaning a seal which extends through a geometrically long path between two sealing surfaces and / or sealing edges and in particular parallel to the Sealing surfaces achieved a sealing effect, in particular due to a high flow resistance between the sealing surfaces.
  • the path is in particular longer than 3 mm, advantageously longer than 10 mm, particularly advantageously longer than 30 mm.
  • the labyrinth seal seals non-contact in at least one operating state, that is, the two sealing surfaces and / or sealing edges, or generally the sealing surface and / or
  • the sealing device preferably has, in addition to the labyrinth seal, another sealant that appears appropriate to the person skilled in the art.
  • the sealing device comprises at least one centrifugal seal.
  • a centrifugal force seal is to be understood in particular as a seal which is intended to be deformed by a centrifugal force
  • a sealing element of the centrifugal force seal is connected to the drive shaft in a rotationally fixed manner
  • a particularly advantageous and efficient sealing effect can be achieved in various operating states, in particular during operation and storage.
  • the centrifugal force seal preferably has a further sealing means which appears expedient to the person skilled in the art.
  • the sealing device has at least one spring element which is provided to effect at least one sealing means a force, whereby a particularly advantageous sealing effect can be achieved.
  • a "spring element” is to be understood in particular to mean an element which is designed as a metallic spring element, as an elastomeric spring element, as a pressurized medium, as a folding collar spring, as a spring element which appears expedient to the person skilled in the art and / or advantageously as a helical spring
  • the spring element is formed by a component formed separately from the sealant.
  • the sealing device has an elastic sealing disc, whereby a particularly reliable and robust seal is possible.
  • the term "elastic” is to be understood in particular that the sealing disc is made of a material that is intended to be deformed during operation and / or during assembly, such as felt, elastomer, brushes, and / or another,
  • the elastic sealing disc is preferably deformable by at least 0.5 mm, advantageously 1 mm, in order to compensate play in the drive shaft.
  • the handheld power tool has at least one electronics and at least one sensor which can be located in the sealed container. are arranged rich, whereby existing space can be advantageously used functionally and in particular can be dispensed with a further sealed electronics space.
  • electronics is meant, in particular, a device in which an electric current is conducted through a gas, a semiconductor and / or through a vacuum.
  • the invention proceeds from a hand-held power tool having a hand-held power tool device, wherein all hand-held power tools which appear to the skilled person to be meaningful, in particular chisel hammers,
  • Fig. 1 shows a hand tool with an inventive
  • Hand power tool device having a sealing device with a sealing lip
  • FIG. 2 shows a partial section of the hand-held power tool device from FIG. 1,
  • 3 to 10 each show a partial section of a further embodiment of a handheld power tool device with differently arranged sealing lips
  • 1 to 16 each show a partial section of a further embodiment of a hand-held power tool device with differently arranged sealing rings
  • 20 and 21 are each a partial section of another embodiment of a hand tool device with different centrifugal seals and
  • Fig. 22 is a partial section of the hand tool device with an elastic sealing washer.
  • FIG. 1 shows a handheld power tool 43a with a partial section, in which a handheld power tool device 10a according to the invention of the handheld power tool 43a is shown.
  • the hand tool 43a is designed as an angle grinder.
  • the handheld power tool device 10a comprises a drive shaft 12a, a drive motor 14a, an insert tool attachment 16a, and a bearing unit 18a.
  • the drive shaft 12a connects the drive motor 14a operatively connected to a gear arrangement, not shown, the hand tool 43a, which is designed as an angle gear.
  • the drive motor 14a drives the insert tool attachment 16a via the gear arrangement.
  • the drive motor 14a is arranged on a side 20a of the handheld power tool 43a facing away from the tool attachment 16a within a main handle 44a of the handheld power tool 43a. Seen from the insert tool attachment 16a behind the drive motor 14a, the bearing unit 18a is arranged. The bearing unit 18a supports the drive shaft 12a on the side facing away from the insert tool attachment 16a side 20a and has a sealing element not shown in detail. On a side of the insert tool attachment 16a facing side 46a, another, not shown bearing unit supports the drive shaft 12a. As FIG. 2 shows, the handheld power tool device 10a has a sealing device 22a. The sealing device 22a seals off an area 24a lying axially next to the bearing unit 18a.
  • the region 24a is arranged on a side 20a of the bearing unit 18a facing away from the insert tool attachment 16a and has a substantially cylindrical shape.
  • the hand-held power tool device has an electronics 41 a and a sensor 42 a, which are arranged in the sealed area 24 a.
  • the sensor 42a detects a rotational speed of the drive shaft 12a.
  • the electronics 41 a has a non-illustrated, designed as a microcontroller computing unit and controls or regulates the drive motor 14 a during operation.
  • the sealing device 22a is arranged between the drive motor 14a and the bearing unit 18a.
  • the sealing device 22a has a sealing element 26a, which is separated from the bearing unit 18a and formed as a sealing lip 30a, a sealing disc 48a and a sealing surface 50a.
  • the sealing disc 48a is rotatably and tightly connected to the drive shaft 12a.
  • the sealing disc 48a has a tubular fastening region 52a.
  • a sealing washer could be at least partially formed integrally with a drive shaft.
  • the washer 48a is connected to the seal member 26a in an annular connection portion 54a, and spaces the seal member 26a from the drive shaft 12a in the radial direction.
  • the sealing member 26a has, from the annular connecting portion 54a, a major extension in a direction facing the insert tool attachment 16a and radially outward.
  • the direction of the main extension is at an angle to an axial direction of about 15 degrees.
  • the sealing element 26a slides sealingly along the sealing surface 50a during operation.
  • the sealing surface 50a is integrally formed with a housing 56a of the power tool 43a and aligned substantially axially.
  • a sealing surface could be connected to the housing from a material that appears appropriate to a person skilled in the art.
  • a housing of the hand tool 43a could be formed in several pieces.
  • FIGS. 3 to 22 show 20 further exemplary embodiments of the invention. To distinguish the embodiments, the letter a in the reference numerals of the embodiment in Figures 1 and 2 by the
  • the sealing devices shown are arranged in front of and behind the storage unit, simple or staggered and arranged in various combinations that appear expedient to those skilled in the art, and can be mirrored at least about one plane that is perpendicular to an axial direction of the drive shaft.
  • the sealing disks and / or the sealing elements can be non-rotatably connected to the housing of the power tool or to the drive shaft.
  • FIG. 3 shows, like FIG. 2, a handheld power tool device 10b with a drive shaft 12b and a bearing unit 18b which supports the drive shaft 12b on a side 20b facing away from a tool attachment 16b.
  • the hand-held power tool device 10b has a sealing device 22b, which seals a region 24b lying axially next to the bearing unit 18b, which is arranged on a side 20b of the bearing unit 18b facing away from the tool attachment 16b.
  • the sealing device 22b has a sealing element 26b which is separate from the bearing unit 18b and designed as a sealing lip 30b, a sealing disk 48b and a sealing surface 50b.
  • the sealing member 26b has, from an annular connecting portion 54b, a main extension in a direction facing away from and radially outward toward the insert tool mounting 16b.
  • FIG. 4 shows, like FIG. 2, a handheld power tool device 10c with a drive shaft 12c and a bearing unit 18c which supports the drive shaft 12c on a side 20c which faces away from an insert tool attachment 16c.
  • the hand-held power tool device 10c has a sealing device 22c, which seals a region 24c lying axially next to the bearing unit 18c and which is arranged on a side 20c of the bearing unit 18c facing away from the insertion tool attachment 16c.
  • the sealing device 22c has a sealing element 26c, which is separate from the bearing unit 18c and designed as a sealing lip 30c, a sealing disk 48c and a sealing surface 50c.
  • the sealing disc 48c is rotatably connected to a housing 56c of a hand tool 43c.
  • FIG. 5 shows, like FIG. 3, a handheld power tool device 10d with a
  • the hand-held power tool device 10d has a sealing device 22d, which seals a region 24d located axially next to the bearing unit 18d, which is arranged on a side 20d of the bearing unit 18d facing away from the tool attachment 16d.
  • the sealing device 22d has a sealing element 26d, which is separate from the bearing unit 18d and designed as a sealing lip 30d, a sealing disk 48d and a sealing surface 50d.
  • the sealing member 26d has, from an annular connecting portion 54d, a major extension in a direction facing the insert tool attachment 16d and radially inward.
  • FIG. 6 shows, like FIG. 2, a handheld power tool device 10e with a drive shaft 12e and a bearing unit 18e, which drives the drive shaft 12e on a
  • the hand-held power tool device 10e has a sealing device 22e which seals a region 24e lying axially next to the bearing unit 18e, which is arranged on a side 20e of the bearing unit 18e facing away from the insertion tool attachment 16e.
  • the sealing device 22e has a sealing element 26e which is separate from the bearing unit 18e and designed as a sealing lip 30e, a sealing disk 48e and a sealing surface 50e.
  • the sealing device 22e is arranged on a side facing away from the drive motor 14e side 20e of the bearing unit 18e.
  • FIG. 7 shows, like FIG. 4, a handheld power tool device 10f with a drive shaft 12f and a bearing unit 18f which supports the drive shaft 12f on a side 20f facing away from an insert tool attachment 16f.
  • the hand-held power tool device 10f has a sealing device 22f, which seals a region 24f lying axially next to the bearing unit 18f, which is arranged on a side 20f of the bearing unit 18f facing away from the tool attachment 16f.
  • the sealing device 22f has a sealing element 26f, a sealing disk 48f and a sealing element 26f, which is separated from the bearing unit 18f and designed as a sealing lip 30f
  • FIG. 8 like FIG. 5, shows a handheld power tool device 10g with a
  • the hand-held power tool device 10g has a sealing device 22g, which seals a region 24g lying axially next to the bearing unit 18g, which is arranged on a side 20g of the bearing unit 18g facing away from the tool attachment 16g.
  • the sealing device 22g has two sealing elements 26g, 28g, which are separate from the bearing unit 18g and designed as sealing lips 30g, two sealing disks 48g and two sealing surfaces 50g.
  • the two sealing elements 26g, 28g are in axial
  • Both sealing discs 48g are non-rotatably connected to a housing 56g of a hand tool 43g.
  • the sealing lips 30g point in different directions.
  • FIG. 9 shows, like FIG. 2, a handheld power tool device 10h with a drive shaft 12h and a bearing unit 18h which supports the drive shaft 12h on a side 20h facing away from a tool attachment 16h.
  • the hand-held power tool device 10h has a sealing device 22h, which seals a region 24h located axially next to the bearing unit 18h, which is arranged on a side facing away from the insert tool attachment 16h 20h of the storage unit 18h.
  • the sealing device 22h has a separate from the bearing unit 18h and formed as a sealing lip 30h sealing element 26h, a sealing disc 48h and a sealing surface 50h.
  • the sealing element 26h is rotatably connected to a housing 56h of a hand tool 43h.
  • the sealing disc 48h is rotatably connected to the drive shaft 12h.
  • the sealing surface 50h is integrally formed with the sealing disc 48h and disposed coaxially with the output shaft 12h.
  • the sealing element 26 h is prestressed in an operational state of operation and pushes radially from the outside against the sealing surface 50 h.
  • sealing element 26h from a connecting portion 54h to the housing 56h, has a major extension in a direction pointing in the direction of the insert tool fixture 16h and radially inward.
  • the sealing lip 30h could be made with the housing in a two-component injection molding process.
  • FIG. 10 shows, like FIG. 9, a handheld power tool device 10i with a drive shaft 12i and a bearing unit 18i which supports the drive shaft 12i on a side 20i facing away from a tool attachment 16i.
  • the hand-held power tool device 10i has a sealing device 22i, which seals a region 24i lying axially next to the bearing unit 18i and which is arranged on a side 20i of the bearing unit 18i facing away from the insert tool attachment 16i.
  • the sealing device 22i has a sealing element 26i, which is separate from the bearing unit 18i and designed as a sealing lip 30i, a sealing disk 48i and a sealing surface 50i.
  • the sealing surface 50i is integrally formed with the sealing washer 48i and arranged perpendicular to an axial direction.
  • the sealing element 26i is biased in an operational condition and presses axially in the direction of the insert tool attachment 16i against the sealing surface 50i.
  • the sealing device 22i could have a plurality of similarly formed sealing lips.
  • FIG. 11 shows, like FIG. 2, a handheld power tool device 10j with a drive shaft 12j and a bearing unit 18j which supports the drive shaft 12j on a side 20j facing away from a tool attachment 16j.
  • the Hand machine tool device 10j has a sealing device 22j which seals a region 24j lying axially next to the bearing unit 18j and which is arranged on a side 20j of the bearing unit 18j facing away from the insert tool attachment 16j.
  • the sealing device 22j has a sealing element 26j separated from the bearing unit 18j and designed as a sealing ring 32j, a sealing surface 50j and a sealing disk 48j, which is designed as a sealing ring mount.
  • the sealing disc 48j is non-rotatably connected to a housing 56j of a hand tool 43j.
  • the sealing surface 50j is formed integrally with the drive shaft 12j and arranged in parallel to an axial direction.
  • the sealing element 26j slides between the sealing surface 50j and a groove of the sealing disc 48j.
  • the sealing member 26j pushes axially inwardly on the sealing surface 50j and is formed as an O-ring.
  • FIG. 12 shows, like FIG. 11, a handheld power tool device 10k having a drive shaft 12k and a bearing unit 18k which supports the drive shaft 12k on a side 20k facing away from an insert tool attachment 16k.
  • the hand-held power tool device 10k has a sealing device 22k, which seals a region 24k lying axially next to the bearing unit 18k, which is arranged on a side 20k of the bearing unit 18k facing away from the tool attachment 16k.
  • the sealing device 22k has a sealing element 26k formed separately from the bearing unit 18k, a sealing surface 50k and a sealing disk 48k.
  • Sealing disc 48k is partially formed integrally with the drive shaft 12k.
  • the sealing surface 50k is integrally formed with a housing 56k of a portable power tool 43k and arranged parallel to an axial direction.
  • the sealing element 26k pushes axially outwardly onto the sealing surface 50k.
  • a sealing element could press axially inwards onto a sealing surface.
  • the sealing element 26k is designed as a permanently greased sealing ring 32k, but could alternatively also be made of polytetrafluoroethylene, of foam or of another material that appears appropriate to a person skilled in the art.
  • FIG. 13 shows, like FIG. 12, a handheld power tool device 101 with a drive shaft 121 and a bearing unit 181, which drives the drive shaft 121 on a drive shaft 121.
  • ner side 201 stores, which faces away from an insert tool attachment 161.
  • the hand-held power tool device 101 has a sealing device 221 which seals off a region 241 lying axially next to the bearing unit 181, which is arranged on a side 201 of the bearing unit 181 facing away from the insert tool attachment 161.
  • the sealing device 221 has a sealing element 261, which is separate from the bearing unit 181 and designed as a sealing ring 321, a sealing surface 501 and a sealing disk 481.
  • the sealing disc 481 is rotatably connected to the drive shaft 121 and protrudes, partially tubular, into a recess 581 of a housing 561 of a hand tool 431 inside.
  • the sealing element 261 is arranged radially inside the sealing disc 481.
  • the sealing surface 501 is integrally formed with the housing 561 and arranged in parallel to an axial direction.
  • the sealing element 261 pushes axially inwardly on the sealing surface 501.
  • a sealing element could press axially outwardly onto a sealing surface.
  • FIG. 14 shows, like FIG. 13, a handheld power tool device 10m with a drive shaft 12m and a bearing unit 18m which supports the drive shaft 12m on a side 20m facing away from a tool attachment 16m.
  • the hand-held power tool device 10m has a sealing device 22m, which seals a region 24m lying axially next to the bearing unit 18m, which is arranged on a side 20m of the bearing unit 18m facing away from the insertion tool attachment 16m.
  • the sealing device 22m has a sealing element 26m, a spring element 38m and a sealing washer 48m separated from the bearing unit 18m and designed as a sealing ring 32m.
  • the sealing disk 48m partially tubular in shape, projects into a recess 58m of a housing 56m of a hand-held power tool 43m.
  • the spring element 38m causes a force on the sealing element 26m in an operative state and, in a direction facing the insert tool attachment 16m, pushes the sealing element 26m against a sealing surface 50m of the sealing disc 48m.
  • the sealing element 26m causes a sealing force on two axially aligned surfaces of the recess 58m.
  • FIG. 15 shows, like FIG.
  • a hand-held power tool device 10n with a drive shaft 12n and a bearing unit 18n which supports the drive shaft 12n on a side 20n facing away from a tool attachment 16n.
  • the hand-held power tool device 10n has a sealing device 22n which seals a region 24n lying axially next to the bearing unit 18n, which is arranged on a side 20n of the bearing unit 18n facing away from the insert tool attachment 16n.
  • the sealing device 22n has a sealing element 26n, which is separate from the bearing unit 18n and designed as a sealing ring 32n, a sealing surface 50n and a sealing element
  • FIG. 16 shows, like FIG. 15, a handheld power tool device 10o with a drive shaft 12o and a bearing unit 18o which supports the drive shaft 12o on a side 20o facing away from an insert tool attachment 16o.
  • the hand-held power tool device 10o has a sealing device 22o, which seals a region 24o lying axially next to the bearing unit 18o, the side 20o facing away from the insert tool fastening 16o
  • Bearing unit 18o is arranged.
  • the sealing device 22o has a separate from the bearing unit 18o and formed as a sealing ring 32o sealing element 26o, a sealing surface 50o and an elastic sealing washer 40o.
  • the sealing element 26o is slidably loaded from one side in the axial direction of the sealing disc 40o and held by another side in the axial direction of a housing 56o of a hand tool 43o.
  • the sealing washer 40o could aerodynamic elements not shown in detail, such as helical grooves, a wave profile or wing line elements have.
  • FIG. 17 shows, like FIG. 2, a hand-held power tool device 10p with a drive shaft 12p and a bearing unit 18p which supports the drive shaft 12p on a side 20p facing away from a tool attachment 16p.
  • the hand-held power tool device 10p has a sealing device 22p, which seals a region 24p lying axially next to the bearing unit 18p, which is arranged on a side 20p of the bearing unit 18p facing away from the insert tool attachment 16p.
  • the sealing device 22p includes a labyrinth seal 34p.
  • the labyrinth seal 34p has a sealing member 26p formed separately from the bearing unit 18p and formed as a labyrinth seal member.
  • the sealing element 26p projects into a recess 58p of a housing 56p of a hand-held power tool 43p in the axial direction and runs without contact.
  • a sealing element of the sealing device 22p could also be partially formed integrally with the drive shaft 12p and / or the housing 56p and / or be formed in a hollow cone shape.
  • FIG. 18 shows, like FIG. 17, a handheld power tool device 10q with a labyrinth seal 34q, which has two parallel hollow cylindrical sealing elements 26q, which are designed as labyrinth seal elements.
  • the sealing element 26q are arranged radially one behind the other, but could alternatively also be arranged axially next to each other. At least one of the sealing elements 26q could be elastic and act as part of a centrifugal seal.
  • FIG. 19 shows, like FIG. 17, a handheld power tool device 10r with a labyrinth seal 34r, which has three parallel tubular sealing elements 26r, which are designed as labyrinth sealing elements.
  • FIG. 20 shows, like FIG. 2, a handheld power tool device 10s with a drive shaft 12s and a bearing unit 18s which supports the drive shaft 12s on a side 20s facing away from a tool attachment 16s.
  • the handheld power tool device 10s has a sealing device 22s, which seals a region 24s lying axially next to the bearing unit 18s and which is arranged on a side 20s of the bearing unit 18s facing away from the insertion tool attachment 16s.
  • the sealing device 22s comprises a centrifugal force seal 36s which has a sealing element 26s formed separately from the bearing unit 18s and a sealing surface 50s.
  • the sealing element 26s is non-rotatably connected to the drive shaft 12s and is formed as an elastic sealing sleeve.
  • the sealing element 26s has a main extension direction, that of a connecting region
  • the sealing element 26s is formed substantially in the form of a hollow cone.
  • the sealing surface 50s is oriented essentially parallel to the sealing element 26s in a stationary operating state and is formed integrally with a housing 56s of a hand-held power tool 43s.
  • centrifugal forces deflect the sealing element 26s away from the sealing surface 50s so that the sealing element 26s and the sealing surface 50s are then spaced everywhere. A sealing effect is maintained during operation by centrifugal forces acting on chips.
  • FIG. 21 shows, like FIG. 20, a handheld power tool device 10t with a drive shaft 12t and a bearing unit 18t supporting the drive shaft 12t on a side 20t facing away from an insert mounting 16t.
  • the hand-held power tool device 10t has a sealing device 22t, which seals a region 24t lying axially next to the bearing unit 18t, which is arranged on a side 20t of the bearing unit 18t facing away from the insertion tool attachment 16t.
  • the sealing device 22t is formed as a centrifugal seal 36t and has a sealing element 26t and a sealing surface 50t.
  • the seal member 26t is separated from the bearing unit 18t and formed as a seal lip 30t and aligned substantially parallel to an axial direction of the drive shaft 12t.
  • the sealing surface 50t is likewise oriented substantially parallel to an axial direction and has a hollow cylindrical shape.
  • FIG. 22 shows, like FIG. 2, a hand-held power tool device 10u with a drive shaft 12u and a bearing unit 18u which supports the drive shaft 12u on a side 20u facing away from a tool attachment 16u.
  • the handheld power tool device 10u has a sealing device 22u which seals a region 24u lying axially next to the bearing unit 18u, the side 20u of the bearing unit 18u facing away from the insert tool attachment 16u is arranged.
  • the sealing device 22u has a sealing element 26u formed from the bearing unit 18u and designed as an elastic sealing washer 40u and a sealing edge
  • the sealing washer 40u is arranged substantially perpendicular to an axial direction of the drive shaft 12u and non-rotatably connected to the drive shaft 12u.
  • the sealing disk 40u slides sealingly over the sealing edge 60u and is thereby stabilized by centrifugal forces.
  • the sealing edge 60u is formed on a housing 56u of a handheld power tool 43u.
  • a sealing edge could alternatively or additionally be molded onto the sealing disk 40u. If the sealing device has a plurality of sealing edges, these are of different heights. Further, the skilled person appear appropriate sense sealing elements are also possible.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sealing Of Bearings (AREA)
  • Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
  • Sealing Devices (AREA)

Abstract

L'invention concerne un système de machine-outil à main présentant au moins un arbre d'entraînement (12a-u), un moteur d'entraînement (14a-u), une fixation d'outil d'insertion (16a-u) et au moins un ensemble palier (18a-u), destiné à loger l'arbre d'entraînement (12a-u) sur un côté (20a-u) opposé à la fixation d'outil d'insertion (16a-u) du moteur d'entraînement (14a-u), un dispositif d'étanchéité étant réalisé pour assurer l'étanchéité d'au moins une zone (24a-u) qui est située axialement à proximité de l'ensemble palier (18a-u), et est agencée sur un côté (20a-u) opposé à la fixation d'outil d'insertion (16a-u) de l'ensemble palier (18a-u). Selon l'invention, le dispositif d'étanchéité présente au moins un élément d'étanchéité (26a-u, 28g), l'ensemble palier (18a-u) et l'élément d'étanchéité étant réalisés de manière séparée.
EP10787345.7A 2010-01-07 2010-11-23 Système de machine-outil à main Not-in-force EP2521634B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010000722A DE102010000722A1 (de) 2010-01-07 2010-01-07 Handwerkzeugmaschinenvorrichtung
PCT/EP2010/068003 WO2011082880A1 (fr) 2010-01-07 2010-11-23 Système de machine-outil à main

Publications (2)

Publication Number Publication Date
EP2521634A1 true EP2521634A1 (fr) 2012-11-14
EP2521634B1 EP2521634B1 (fr) 2016-11-02

Family

ID=43608888

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10787345.7A Not-in-force EP2521634B1 (fr) 2010-01-07 2010-11-23 Système de machine-outil à main

Country Status (6)

Country Link
US (1) US20120305279A1 (fr)
EP (1) EP2521634B1 (fr)
CN (1) CN102712084A (fr)
DE (1) DE102010000722A1 (fr)
RU (1) RU2012133521A (fr)
WO (1) WO2011082880A1 (fr)

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DE102014207434A1 (de) * 2014-04-17 2015-10-22 Robert Bosch Gmbh Verfahren zum Betreiben einer Handwerkzeugmaschine, Handwerkzeugmaschine
US20150343616A1 (en) * 2014-06-03 2015-12-03 Soartec Industrial Corp. Hammering set for an impact tool
EP3825067A1 (fr) * 2019-11-21 2021-05-26 Hilti Aktiengesellschaft Procédé de fonctionnement d'une machine-outil et machine-outil
EP3991918A1 (fr) * 2020-10-28 2022-05-04 Hilti Aktiengesellschaft Géométrie d'étanchéité pour une machine-outil mobile

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Also Published As

Publication number Publication date
US20120305279A1 (en) 2012-12-06
RU2012133521A (ru) 2014-02-20
CN102712084A (zh) 2012-10-03
DE102010000722A1 (de) 2011-07-14
WO2011082880A1 (fr) 2011-07-14
EP2521634B1 (fr) 2016-11-02

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