EP3722048A1 - Machine-outil portative - Google Patents

Machine-outil portative Download PDF

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Publication number
EP3722048A1
EP3722048A1 EP20171057.1A EP20171057A EP3722048A1 EP 3722048 A1 EP3722048 A1 EP 3722048A1 EP 20171057 A EP20171057 A EP 20171057A EP 3722048 A1 EP3722048 A1 EP 3722048A1
Authority
EP
European Patent Office
Prior art keywords
side wall
machine tool
collar
hand machine
working axis
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
EP20171057.1A
Other languages
German (de)
English (en)
Other versions
EP3722048B1 (fr
Inventor
Henrik Lüßmann
Pierre Pallmer
Steffen Geiger
Ferdinand Kristen
Franz Popp
Erich Daigeler
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 EP3722048A1 publication Critical patent/EP3722048A1/fr
Application granted granted Critical
Publication of EP3722048B1 publication Critical patent/EP3722048B1/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
    • 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
    • B25D11/125—Means for driving the impulse member comprising a crank mechanism with a fluid cushion between the crank drive and the striking body
    • 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
    • B25D17/06—Hammer pistons; Anvils ; Guide-sleeves for pistons
    • 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
    • B25D2217/0011—Details of anvils, guide-sleeves or pistons
    • B25D2217/0023—Pistons
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2222/00—Materials of the tool or the workpiece
    • B25D2222/21—Metals
    • B25D2222/27—Brass
    • 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
    • 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
    • B25D2250/345—Use of o-rings
    • 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
    • B25D2250/365—Use of seals

Definitions

  • the present invention relates to a hand machine tool with a pneumatic hammer mechanism, as shown in FIG DE 11 33 680 B known and described in the preamble of claim 1.
  • EP 2 857 149 A1 describes a hand machine tool with a pneumatic hammer mechanism and an exciter piston for the pneumatic hammer mechanism.
  • the exciter piston has a circumferential groove in its outer surface, into which a sealing ring is inserted.
  • the elastic sealing ring is expanded to such an extent that it can be pushed over the outer surface to the groove.
  • the elastic sealing ring contracts again in the groove.
  • the elastic sealing ring must be selected with regard to the assembly.
  • the hand machine tool has a tool holder for receiving and locking a tool, a pneumatic hammer mechanism and a motor.
  • the pneumatic hammer mechanism has an exciter piston, a hammer and a pneumatic chamber closed between the exciter piston and the hammer on a working axis.
  • the motor drives the exciter piston.
  • the exciter piston has a pot-shaped base body, a sealing ring and a tubular casing body.
  • the cup-shaped base body has a side wall surrounding the working axis and a collar protruding in the radial direction with respect to the side wall.
  • the hollow cylindrical casing body is arranged on the base body, surrounding the side wall and spaced apart from the collar by a groove along the working axis.
  • the sealing ring is arranged in the groove.
  • the groove is open on the side before the casing body is assembled.
  • the sealing ring can be pushed over the side wall without the need for expansion.
  • the casing body is pushed onto the side wall after the sealing ring and closes the groove for the sealing ring.
  • the groove is preferably annular around the side wall.
  • the groove is closed along the working axis in the direction of the racket by the collar of the base body, in the radial direction to the working axis by the side wall of the base body and along the working axis opposite the collar by an end face of the casing body.
  • the groove is formed by two separate bodies, namely the base body and the casing body.
  • the sealing ring can bear directly on the collar and on the end face, only be spaced apart from the collar by an air gap, or only be spaced apart from the end face by an air gap.
  • the sealing ring is formed from a plastic with a hardness of at least 85 Shore.
  • the sealing ring can consist of a brass alloy.
  • the base body and the casing body consist of different materials.
  • the two bodies can be formed from different plastics, in particular thermoplastics.
  • the base body can be selected with regard to temperature resistance and the casing body with regard to a favorable coefficient of friction with the guide tube.
  • the base body is formed in particular from a plastic which has a high degree of rigidity at elevated temperatures in the range between 100 ° C (Celsius) and 150 ° C.
  • the base body has a base plate which is arranged on the club side of the side wall, and the base plate and the collar lie in one plane.
  • the sealing ring can thus be arranged as close as possible to the pneumatic chamber in order to avoid dead volumes.
  • One embodiment provides that an inner surface of the casing body rests flush against an outer surface of the side wall.
  • a sealing element can be arranged in the radial direction between the inner surface of the jacket body and the outer surface of the side wall. The groove is made airtight towards the working axis.
  • the casing body is locked on the side wall by means of a mechanical lock.
  • the lock can be repeatedly releasable or can only be released by destroying the lock.
  • the locking can be done by thread, locking elements or the like.
  • One embodiment provides that the casing body is glued or welded to the side wall.
  • the side wall encloses a cylindrical cavity in which a bearing for a connecting rod is arranged.
  • Fig. 1 shows, as an example of a hand-held chiseling machine tool, an electric hammer 1 schematically.
  • the electric hammer 1 has a tool holder 2 in which a chisel 3 or other tool can be inserted and locked along a working axis 4 .
  • the electric hammer 1 has a handle 5 which is typically attached to an end of a machine housing 6 of the electric hammer 1 facing away from the tool holder 2 .
  • An additional handle can be attached near the tool holder 2 , for example.
  • the user can guide and hold the electric hammer 1 with the handles 5 while chiseling.
  • Energy can be supplied via a battery or a power line 7 .
  • the electric hammer 1 has a pneumatic hammer mechanism 8 with a hammer 9 which, during operation, periodically exerts blows in the direction of impact 10 on the chisel 3 .
  • the racket 9 is guided movably on the working axis 4 .
  • the club 9 can strike the chisel 3 directly.
  • the hammer 9 strikes a striker 11 , which transfers the impact to the chisel 3 mounted in the tool holder 2 .
  • the striker 11 is arranged in the striking direction 10 of the striker 9 between the striker 9 and the tool holder 2 .
  • the pneumatic hammer mechanism 8 is driven by an electric motor 12 .
  • the electric motor 12 moves an exciter piston 13 back and forth on the working axis 4 periodically.
  • the striker 9 is coupled to the exciter piston 13 via an air spring.
  • the striking mechanism 8 has a guide tube 14 in which the exciter piston 13 is guided along the working axis 4 .
  • the guide tube 14 has a, preferably cylindrical, inner surface which runs parallel to the working axis 4 .
  • the exciter piston 13 lies flush against the inner surface 15 .
  • the cross-sectional profile of the exciter piston 13 corresponds to the hollow profile of the guide tube 14 .
  • the exciter piston 13 closes the guide tube 14 airtight against the direction of impact 10 .
  • the exciter piston 13 is composed of at least the following three separate elements: a pot-shaped base body 16 , a tubular casing body 17 and a sealing ring 18 .
  • the pot-shaped base body 16 is inserted into the tubular casing body 17 .
  • the base body 16 has a radially protruding collar 19 .
  • the sealing ring 18 spans the base body 16 and is arranged along the working axis 4 between the collar 19 and the jacket body 17 .
  • the cup-shaped base body 16 has a cavity which is open on one side and which lies on the working axis 4 .
  • the cavity is closed along the working axis 4 , in the impact direction 10 by a base plate 20 and in the radial direction around the working axis 4 by a side wall 21 .
  • the cavity is open against the direction of impact 10 .
  • the base plate 20 forms the end face 22 of the exciter piston 13 , which closes a pneumatic chamber 23 of the hammer mechanism 8 .
  • the base plate 20 and its end face 22 essentially correspond to the hollow cross section of the guide tube 14 .
  • the bottom plate 20 is circular.
  • the diameter 24 of the base plate 20 corresponds to the inner diameter of the guide tube 14 .
  • the end face 22 is preferably flat.
  • the side wall 21 is arranged on the side of the base plate 20 facing away from the racket 9 .
  • the side wall 21 is preferably closed circumferentially around the working axis 4 .
  • the side wall 21 runs along or parallel to the working axis 4 .
  • the exemplary side wall 21 is essentially cylindrical.
  • the radial outer dimension, for example the outer diameter 25 , of the side wall 21 is smaller than the radial outer dimension, for example the outer diameter 24 , of the base plate 20 .
  • the base plate 20 thus projects radially from the side wall 21 .
  • the radially protruding ring is referred to here as a collar 19 .
  • the collar 19 is preferably at the same height along the working axis 4 as the base plate 20 , that is to say in the radial direction as a direct extension of the base plate 20 .
  • the base plate 20 can have the same or different axial dimensions in the region of the collar 19 or at the level of the working axis 4 .
  • the pot-shaped base body 16 is preferably a monolithic body.
  • the base plate 20 and the side wall 21 are connected to one another without joining zones, in particular not welded, glued, screwed or latched to one another.
  • the base body 16 is preferably made of plastic, for example a thermoplastic.
  • the plastic is preferably rigid even at temperatures between 100 ° C. and 150 ° C. so that the base plate 20 does not yield when the pneumatic chamber 23 is compressed.
  • Polyphthalamides (PPA) or radiation-crosslinked polyamides are particularly suitable examples.
  • the thermoplastic can be reinforced by additives. Thermosets seem less suitable.
  • the base body 16 can be produced as an injection molded body.
  • the jacket body 17 is essentially a tube, for example a hollow cylinder.
  • the jacket body 17 is placed on the side wall 21 of the base body 16 .
  • the side wall 21 centers the casing body 17.
  • the casing body 17 rests against the side wall 21 in a form-fitting manner in the radial direction.
  • a wall thickness of the jacket body 17 essentially corresponds to the radial dimension of the collar 19.
  • the jacket body 17 essentially has the shape of an extrusion body of the collar 19 along the working axis 4.
  • the radial inner dimension of the jacket body 17 is correspondingly equal to the radial outer dimension 25 of the side wall 21 .
  • the dimensions are identical, for example, taking into account the typical manufacturing tolerances.
  • the outer surface 26 of the jacket body 17 forms the guide surface of the exciter piston 13 .
  • the outer surface 26 rests against the inner surface 15 of the guide tube 14 .
  • the outer diameter 24 of the jacket body 17 is correspondingly equal to the inner diameter of the guide tube 14
  • the jacket body 17 is spaced apart from the base plate 20 , ie the collar 19 , along the working axis 4 .
  • the collar 19 and the jacket body 17 close an annular circumferential groove 27 between them.
  • the surfaces of the groove 27 are formed in the direction of impact 10 by the collar 19 , in the radial direction by the side wall 21 and against the direction of impact 10 by an end face of the casing body 17 .
  • the groove 27 is closed over its entire circumference along the working axis 4 and in the radial direction towards the working axis 4 . Air can only enter or exit the groove 27 from radially outside.
  • a distance between the jacket body 17 and the base plate 20 ie the width of the groove, corresponds approximately to the axial dimension, for example the cord diameter, of the sealing ring 18 .
  • the sealing ring 18 can rest on the collar 19 and the end face 28 of the jacket body 17 , or is only separated from the collar 19 or the end face 28 by an air gap.
  • the jacket body 17 can latch with the base body 16 in order to secure the jacket body 17 axially on the base body 16 .
  • the exemplary casing body 17 has a pawl 29 which can be deflected away from the working axis 4 in the radial direction.
  • the casing body 17 is slotted adjacent to the pawl 29 , for example.
  • the slots form an arm 30 , at the end of which the pawl 29 is.
  • the arm forms an elastically deflectable solid body joint.
  • the side wall 21 of the base body 16 is provided with a recess 31 into which the pawl 29 engages.
  • the latch 29 preferably has a slight axial play in the recess and secures the sheath body 17 on the base body 16.
  • a dimension of the recess 31 along the working axis 4 can therefor equal to the dimension of the pawl 29 may be of the machining axis 4 along.
  • the recess 31 can be formed by a circumferential slot, a circumferential groove, a hole or a dome-shaped recess.
  • the pawl 29 can be brought out of engagement with the recess 31 by radial deflection.
  • the pawl 29 protrudes beyond the outer surface 26 when it is deflected.
  • the outer diameter of the jacket body 17 is greater than the inner diameter of the guide tube 14. Accordingly, the pawl 29 is secured against deflection and loosening when the exciter piston 13 is arranged in the guide tube 14 .
  • the jacket body 17 can be screwed to the base body 16 .
  • the inner surface of the jacket body 17 and the outer surface of the side wall 21 are provided with corresponding threads.
  • the thread can also be used in addition to the pawl 29 .
  • the jacket body 17 and the base body 16 can be glued or welded.
  • the jacket body 17 is preferably a monolithic body.
  • the jacket body 17 is not composed of elements connected via joining zones, in particular not of elements welded, glued, screwed or otherwise mechanically connected to one another.
  • the casing body 17 is preferably made of a plastic, for example a single thermoplastic.
  • the plastic of the jacket body 17 can be different from the plastic of the base body 16 .
  • Polyamides are suitable for the sheath body 17 because of their high abrasion resistance and relatively simple processability.
  • the polyamide can be mixed with Teflon (polytetrafluoroethylene, PTFE), graphite or molybdenum disulphide (MoS2) in order to further improve the coefficient of friction.
  • the jacket body 17 can be manufactured as an injection molded body.
  • the sealing ring 18 is seated on the side wall 21 of the base body 16 .
  • the sealing ring 18 is closed around the circumference.
  • the sealing ring 18 is pushed over the side wall 21 to adjacent the base plate 20 .
  • the jacket body 17 is pushed onto the side wall 21 in the impact direction 10 .
  • the inside diameter of the sealing ring 18 is preferably the same as or slightly larger than the outside diameter of the side wall 21 , but smaller than the diameter of the base plate 20 and smaller than the outside diameter of the jacket body 17 .
  • the sealing ring 18 is caught along the working axis 4 between the base plate 20 and the casing body 17 .
  • the sealing ring 18 preferably projects radially somewhat beyond the base plate 20 and the casing body 17 .
  • the sealing ring 18 rests against the inner surface 15 of the guide tube 14 in an airtight manner under radial prestress.
  • the sealing ring 18 can have an inner diameter that is slightly larger than the outer diameter 25 of the side wall 21 . Between the sealing ring 18 and the base body 16 there is a gap in the radial direction into which the sealing ring 18 can deflect.
  • An additional sealing element 32 can be arranged in the radial direction between the jacket body 17 and the side wall 21 . The sealing element 32 seals the radial inner surface of the jacket body 17 from the radial outer surface of the side wall 21 . The sealing element 32 prevents an exchange of air from the groove 27 into the inner cavity of the exciter piston 13.
  • the sealing element 32 can be an O-ring, as shown, or alternatively, inter alia, by a press fit, by lamellae on the radial inner surface of the casing body 17 , be formed by lamellae on the radial outer surface of the side wall 21 .
  • the sealing ring 18 is preferably a monolithic body.
  • the sealing ring 18 consists for example of nitrile rubber, for example continuously from a single plastic.
  • the sealing ring 18 can be produced as an injection molded body.
  • the sealing ring 18 preferably has a hardness of more than 85 Shore, for example more than 90 Shore, at most 95 Shore.
  • the sealing ring 18 has a relatively high rigidity, which enables a permanent seal on the guide tube 14 .
  • a sealing ring 18 of this hardness is sufficiently elastically deformable to compensate for unevenness in the guide tube 14 .
  • the sealing ring 18 is already significantly deformed when the inner diameter of the sealing ring 18 is stretched to the outer diameter of the casing body 17 .
  • the remaining plastic elongation after stretching is greater than 0.2%.
  • the sealing ring 18 cannot therefore be pushed over the preassembled jacket body 17 during assembly without being damaged in the process.
  • a softer sealing ring 18 with a hardness between 70 Shore and 80 Shore is
  • sealing ring 18 Another preferred material for the sealing ring 18 is polyphthalamide.
  • the sealing ring 18 can also be made from a brass alloy.
  • a bearing for a connecting rod 33 is formed within the exciter piston 13 .
  • the exemplary bearing is formed by a first bearing shell 34 and a second bearing shell 35 , which support a bolt 36 between them along the working axis 4 .
  • the bolt 36 is pivotable in the bearing shells 34, 35 about a pivot axis perpendicular to the working axis 4 .
  • the connecting rod 33 is suspended from the bolt 36 .
  • the bolt 36 is monolithic with the connecting rod 33 .
  • the two bearing shells 34, 35 lie within the pot-shaped base body 16.
  • the side wall 21 includes the bearing shells 35.
  • the casing body 17 secures the two bearing shells 34, 35 by means of a cover plate 37.
  • the second bearing shell 35 can be designed as part of the casing body 17 .
  • the racket 9 is arranged in the guide tube 14 .
  • the racket 9 is guided along the working axis 4 through the guide tube 14 .
  • the striker 9 lies in the striking direction 10 after the exciter piston 13.
  • the striker 9 rests flush against the inner surface 15 of the guide tube 14 .
  • the cross-sectional profile of the club 9 corresponds to the hollow profile of the guide tube 14.
  • the club 9 closes the guide tube 14 in the direction of impact 10.
  • the exciter piston 13 and the hammer 9 close a pneumatic chamber 23 along the working axis 4 .
  • the pneumatic chamber 23 lies between the exciter piston 13 and the hammer 9.
  • the pneumatic chamber 23 forms the air spring which couples the movement of the hammer 9 to the movement of the exciter piston 13 .
  • the guide tube 14 closes off the pneumatic chamber 23 in the radial direction.
  • the exciter piston 13 is connected to the electric motor 12 via a drive train 38 .
  • the drive train 38 includes a converter 39 which converts the rotational movement of the electric motor 12 into a translational movement.
  • the converter 39 shown by way of example is based on an eccentric wheel driven by the electric motor 12 and the connecting rod 33 anchored in the exciter piston 13 .
  • An alternative embodiment uses a swash plate, which the connecting rod 33 engages on, instead of an eccentric wheel.
  • the drive train 38 can furthermore contain a reduction gear 40 and protective mechanisms, for example a slip clutch 41 .
  • the mechanical and rigid connection of the exciter piston 13 to the electric motor 12 ensures a synchronous movement of the electric motor 12 and the exciter piston 13 .
  • the electric motor 12 is fed by the energy supply.
  • the electric motor 12 can be a universal motor, a mechanically commutating electric motor 12 or an electrically commutating electric motor 12 .
  • the user can switch the electric motor 12 on and off with an operating button 42 .
  • the operating button 42 is arranged on or near the handle 5 and can preferably be actuated by the hand holding the handle 5 .
  • Fig. 4 shows a further exciter piston 13 .
  • the exciter piston 13 has the base body 16 , the jacket body 17 and the sealing ring 18 .
  • the jacket body 17 has noses 43 which project radially inward and which can engage in a corresponding opening in the base body 16 .
  • the side wall 21 is elastic in the area to such an extent that the casing body 17 can be pushed on by bending the side wall 21 . As soon as the lugs 43 are at the level of the opening, the side wall 21 returns to its original shape and the lugs 43 latch.
  • the jacket body 17 is connected to the side wall 21 of the base body 16 in an airtight manner in the radial direction.
  • the exemplary embodiment uses lamellae 44 for this purpose, which are formed on the inside of the casing body 17 .
  • the lamellae 44 can alternatively or additionally be provided on the side wall 21 .

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)
EP20171057.1A 2016-06-24 2017-06-20 Machine-outil portative Active EP3722048B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP16176080.6A EP3260239A1 (fr) 2016-06-24 2016-06-24 Machine-outil portative
EP17733771.4A EP3475031B1 (fr) 2016-06-24 2017-06-20 Machine-outil portative
PCT/EP2017/065060 WO2017220561A1 (fr) 2016-06-24 2017-06-20 Machine-outil portative

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
EP17733771.4A Division EP3475031B1 (fr) 2016-06-24 2017-06-20 Machine-outil portative

Publications (2)

Publication Number Publication Date
EP3722048A1 true EP3722048A1 (fr) 2020-10-14
EP3722048B1 EP3722048B1 (fr) 2022-01-12

Family

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Family Applications (3)

Application Number Title Priority Date Filing Date
EP16176080.6A Withdrawn EP3260239A1 (fr) 2016-06-24 2016-06-24 Machine-outil portative
EP20171057.1A Active EP3722048B1 (fr) 2016-06-24 2017-06-20 Machine-outil portative
EP17733771.4A Active EP3475031B1 (fr) 2016-06-24 2017-06-20 Machine-outil portative

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP16176080.6A Withdrawn EP3260239A1 (fr) 2016-06-24 2016-06-24 Machine-outil portative

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP17733771.4A Active EP3475031B1 (fr) 2016-06-24 2017-06-20 Machine-outil portative

Country Status (4)

Country Link
US (1) US11117250B2 (fr)
EP (3) EP3260239A1 (fr)
CN (1) CN109311145B (fr)
WO (1) WO2017220561A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4371709A1 (fr) 2022-11-15 2024-05-22 Hilti Aktiengesellschaft Mécanisme de percussion pour une machine-outil électrique à main

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DE1133680B (de) 1959-10-14 1962-07-19 Bosch Gmbh Robert Motorisch angetriebener Schlaghammer mit Luftfederung
EP1584422A1 (fr) * 2004-04-07 2005-10-12 HILTI Aktiengesellschaft Procédé et appareil pour réduire les pointes de pression dans une machine-outil munie d'un système de percussion électromagnétique
DE102008054976A1 (de) * 2008-12-19 2010-06-24 Robert Bosch Gmbh Kolben für eine Schlageinheit, insbesondere eines Bohr- und/oder Schlaghammers, Elektrohandwerkzeug mit einer Schlageinheit sowie Verfahren zum Betreiben eines Elektrohandwerkzeugs
DE102011088955A1 (de) * 2011-12-19 2013-06-20 Robert Bosch Gmbh Schlagwerkvorrichtung
EP2857149A1 (fr) 2013-10-03 2015-04-08 HILTI Aktiengesellschaft Machine-outil manuelle

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EP3034242A1 (fr) * 2014-12-18 2016-06-22 HILTI Aktiengesellschaft Machine-outil manuelle
EP3117962A1 (fr) * 2015-07-17 2017-01-18 HILTI Aktiengesellschaft Machine-outil portative

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1133680B (de) 1959-10-14 1962-07-19 Bosch Gmbh Robert Motorisch angetriebener Schlaghammer mit Luftfederung
EP1584422A1 (fr) * 2004-04-07 2005-10-12 HILTI Aktiengesellschaft Procédé et appareil pour réduire les pointes de pression dans une machine-outil munie d'un système de percussion électromagnétique
DE102008054976A1 (de) * 2008-12-19 2010-06-24 Robert Bosch Gmbh Kolben für eine Schlageinheit, insbesondere eines Bohr- und/oder Schlaghammers, Elektrohandwerkzeug mit einer Schlageinheit sowie Verfahren zum Betreiben eines Elektrohandwerkzeugs
DE102011088955A1 (de) * 2011-12-19 2013-06-20 Robert Bosch Gmbh Schlagwerkvorrichtung
EP2857149A1 (fr) 2013-10-03 2015-04-08 HILTI Aktiengesellschaft Machine-outil manuelle

Also Published As

Publication number Publication date
EP3260239A1 (fr) 2017-12-27
CN109311145B (zh) 2022-02-25
EP3475031B1 (fr) 2020-05-13
WO2017220561A1 (fr) 2017-12-28
EP3475031A1 (fr) 2019-05-01
US20190184538A1 (en) 2019-06-20
EP3722048B1 (fr) 2022-01-12
US11117250B2 (en) 2021-09-14
CN109311145A (zh) 2019-02-05

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