EP3260239A1 - Machine-outil portative - Google Patents

Machine-outil portative Download PDF

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Publication number
EP3260239A1
EP3260239A1 EP16176080.6A EP16176080A EP3260239A1 EP 3260239 A1 EP3260239 A1 EP 3260239A1 EP 16176080 A EP16176080 A EP 16176080A EP 3260239 A1 EP3260239 A1 EP 3260239A1
Authority
EP
European Patent Office
Prior art keywords
side wall
hand tool
collar
working axis
sealing ring
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Withdrawn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
EP16176080.6A
Other languages
German (de)
English (en)
Inventor
Pierre Pallmer
Steffen Geiger
Ferdinand Kristen
Franz Popp
Erich Daigeler
Henrik Lüßmann
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 EP16176080.6A priority Critical patent/EP3260239A1/fr
Priority to CN201780039242.3A priority patent/CN109311145B/zh
Priority to EP20171057.1A priority patent/EP3722048B1/fr
Priority to EP17733771.4A priority patent/EP3475031B1/fr
Priority to US16/311,570 priority patent/US11117250B2/en
Priority to PCT/EP2017/065060 priority patent/WO2017220561A1/fr
Publication of EP3260239A1 publication Critical patent/EP3260239A1/fr
Withdrawn legal-status Critical Current

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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 tool with a pneumatic percussion.
  • EP 2 857 149 A1 describes a hand tool with a pneumatic percussion and an exciter piston for the pneumatic percussion.
  • the excitation piston has a circumferential groove in its lateral surface, in which a sealing ring is inserted.
  • the elastic sealing ring is so far expanded during assembly that it can be advanced over the lateral surface up 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 tool of the invention has a tool holder for receiving and locking a tool, a pneumatic percussion and a motor.
  • the pneumatic impact mechanism has on a working axis an exciter piston, a racket and a closed between the exciter piston and the racket pneumatic chamber.
  • the motor drives the exciter piston.
  • the excitation piston has a cup-shaped body, a sealing ring and a tubular shell body.
  • the cup-shaped main body has a working axis enclosing the side wall and a radially opposite the side wall projecting collar.
  • the hollow cylindrical jacket body is arranged on the base body surrounding the side wall and spaced by a groove along the working axis of the collar.
  • the sealing ring is arranged in the groove.
  • the groove is open laterally before assembly of the jacket body.
  • the sealing ring can be slid over the side wall, without requiring an expansion is necessary.
  • the jacket 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 through the side wall of the base body and along the working axis of the collar opposite by an end face of the sheath body.
  • the groove is formed by two separate bodies, namely the main body and the jacket body.
  • the sealing ring can rest directly on the collar and on the end face, can be spaced apart from the collar only by an air gap or can be spaced from the end face only by an air gap.
  • the sealing ring is formed in a preferred embodiment of a plastic having a hardness of at least 85 Shore.
  • a sealing ring with a hardness of 85 Shore, in particular in the range between 85 Shore and 90 Shore, has lower coefficients of friction in the metallic guide tube of the hammer mechanism.
  • the sealing ring may consist of a brass alloy.
  • the base body and the jacket body are made of different materials.
  • the two bodies may be formed of different plastics, in particular thermoplastics.
  • the main body can be selected with regard to temperature resistance and the jacket body with regard to a favorable coefficient of friction with the guide tube.
  • the main body is formed in particular from a plastic which has a high rigidity at elevated temperatures in the range between 100 ° C (Celsius) and 150 ° C.
  • the base body has a bottom plate, which is arranged on the racket side of the side wall, and the bottom plate and the collar lie in a plane.
  • the sealing ring can thus be arranged close to the pneumatic chamber possible to avoid dead volumes.
  • An embodiment provides that an inner surface of the jacket body bears flush against an outer surface of the side wall.
  • a sealing element may 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 formed airtight to the working axis.
  • An embodiment provides that the jacket body is locked by means of a mechanical closure on the side wall.
  • the lock can be solvable or removable only be solved by destroying the lock.
  • the locking can be done by threads, locking elements or the like.
  • An embodiment provides that the jacket body is glued or welded to the side wall.
  • An embodiment provides that the side wall encloses a cylindrical cavity in which a bearing is arranged for a connecting rod.
  • Fig. 1 shows as an example of a hand-held chiseling machine tool schematically an electric hammer 1.
  • the electric hammer 1 has a tool holder 2, in which a chisel 3 or other tool along a working axis 4 can be used and locked.
  • the electric hammer 1 has a handle 5, which is typically attached to a tool holder 2 remote from the end of a machine housing 6 of the electric hammer 1 .
  • An additional handle can be fastened, for example, near the tool holder 2 .
  • the user can lead and hold the electric hammer 1 with the handles 5 during the chiseling.
  • a power supply can be done via a battery or a power line 7 .
  • the electric hammer 1 has a pneumatic percussion 8 with a racket 9, which exerts periodic blows in the direction of impact 10 on the chisel 3 during operation.
  • the racket 9 is movably guided on the working axis 4 .
  • the racket 9 can strike directly on the chisel 3 in one embodiment.
  • the racket 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 direction of impact 10 of the racket 9 between the racket 9 and the tool holder 2 .
  • the pneumatic impact mechanism 8 is driven by an electric motor 12 .
  • the electric motor 12 moves a field piston 13 periodically on the working axis 4 back and forth.
  • the racket 9 is coupled via an air spring to the exciter piston 13 .
  • the impact 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 is parallel to the working axis 4 .
  • the exciter piston 13 is flush with the inner surface 15 at.
  • the cross-sectional profile of the excitation piston 13 corresponds to the hollow profile of the guide tube 14.
  • the excitation piston 13 closes the guide tube 14 airtight against the direction of impact 10th
  • the excitation piston 13 is composed at least of the following three separate elements: a cup-shaped base body 16, a tubular shell body 17 and a sealing ring 18.
  • the cup-shaped base body 16 is inserted into the tubular shell body 17 .
  • the main 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 pot-shaped base body 16 has a one-sided open cavity, which lies on the working axis 4 .
  • the cavity is closed along the working axis 4, in the direction of impact 10 by a bottom plate 20 and in the radial direction about the working axis 4 by a side wall 21 .
  • the cavity is open against the impact direction 10 .
  • the bottom plate 20 forms the end face 22 of the exciter piston 13, which closes a pneumatic chamber 23 of the impact mechanism 8 .
  • the bottom plate 20 and its end face 22 substantially correspond to the hollow cross section of the guide tube 14.
  • the bottom plate 20 is circular.
  • the diameter 24 of the bottom 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 facing away from the racket 9 of the bottom plate 20 .
  • the side wall 21 is preferably closed circumferentially about the working axis. 4
  • the side wall 21 extends along or parallel to the working axis 4.
  • the exemplary side wall 21 is formed substantially cylindrical.
  • the radial outer dimension, for example, the outer diameter 25 of the side wall 21 is less than the radial outer dimension, for example, the outer diameter 24, the bottom plate 20.
  • the bottom plate 20 is characterized over the side wall 21 radially over.
  • the radially projecting ring is referred to here as a collar 19 .
  • the collar 19 is preferably along the working axis 4 at the same height as the bottom plate 20, ie in the radial direction in the immediate extension of the bottom plate 20.
  • the bottom plate 20 may have the same or different axial dimensions in the region of the collar 19 or at the height of the working axis. 4 to have.
  • the pot-shaped basic body 16 is preferably a monolithic body.
  • the bottom plate 20 and the side wall 21 are connected to each other without joining zones, in particular not welded together, glued, screwed, locked.
  • the base body 16 is preferably made of plastic, for example of a thermoplastic.
  • the plastic is preferably stiff even at temperatures between 100 ° C and 150 ° C, so that the bottom plate 20 does not yield during the compression of the pneumatic chamber 23 .
  • Polyphthalamides (PPA) or radiation-crosslinked polyamides are particularly suitable examples.
  • the thermoplastic may be reinforced by additives. Thermosets seem less suitable.
  • the main body 16 may be made as an injection molded body.
  • the sheath body 17 is essentially a tube, eg a hollow cylinder.
  • the sheath body 17 is placed on the side wall 21 of the base body 16 .
  • the side wall 21 centers the jacket body 17.
  • the jacket body 17 is preferably in the radial direction positively against the side wall 21 .
  • a wall thickness of the sheath body 17 corresponds substantially to the radial dimension of the collar 19.
  • the shell body 17 is substantially in the form of an extrusion body of the collar 19 along the working axis 4.
  • the radial inner dimension of the jacket body 17 is accordingly equal to the outer radial dimension 25 of the side wall 21 .
  • the dimensions are identical, for example, taking into consideration the typical manufacturing tolerances.
  • the outer surface 26 of the sheath body 17 forms the guide surface of the exciter piston 13.
  • the outer surface 26 abuts against the inner surface 15 of the guide tube 14 .
  • the outer diameter 24 of the sheath body 17 is correspondingly equal to the inner diameter of the guide tube 14.
  • the sheath body 17 is along the working axis 4 of the bottom plate 20, that is, the collar 19, spaced.
  • the collar 19 and the jacket body 17 close between them an annular circumferential groove 27 .
  • 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 shell body 17 .
  • the groove 27 is closed along its entire circumference along the working axis 4 and in the radial direction to the working axis 4 out. Air can only enter or exit the groove 27 from radially outside.
  • a distance of the sheath body 17 from the bottom plate 20, ie the width of the groove corresponds approximately to the axial dimension, eg 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 sheath body 17 , or is only separated by an air gap of the collar 19 or the end face 28 .
  • the sheath body 17 can lock with the base body 16 in order to secure the sheath body 17 axially on the base body 16 .
  • the exemplary sheath body 17 has a pawl 29 which is deflectable in the radial direction away from the working axis 4 .
  • the sheath body 17 is slotted, for example, adjacent to the pawl 29 .
  • the slots form an arm 30 , at the end of 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 , in 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 along the working axis.
  • the recess 31 may 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 during the deflection.
  • the outer diameter of the sheath body 17 is at deflected pawl 29 is greater than the inner diameter of the guide tube 14. Accordingly, the pawl 29 is secured against deflection and release when the excitation piston 13 is arranged in the guide tube 14 .
  • the sheath body 17 may be bolted to the base 16 in alternative embodiments.
  • the inner surface of the sheath 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 sheath body 17 and the base body 16 can be glued or welded.
  • the sheath body 17 is preferably a monolithic body.
  • the sheath body 17 is not composed of elements connected via joining zones, in particular not welded together, glued, screwed or otherwise mechanically interconnected elements.
  • the sheath body 17 is preferably made of a plastic, for example, a single thermoplastic.
  • the plastic of the sheath body 17 may be different from the plastic of the base body 16 .
  • For the sheath body 17 are suitable polyamides because of their high abrasion resistance and relative ease of processing.
  • the polyamide may be treated with Teflon (polytetrafluoroethylene, PTFE), graphite or molybdenum disulphide (MoS2) to further improve the coefficient of friction.
  • the jacket body 17 can be produced as an injection molded body.
  • the sealing ring 18 is seated on the side wall 21 of the main body 16.
  • the sealing ring 18 is circumferentially closed.
  • the sealing ring 18 is pushed during assembly on the side wall 21 to adjacent to the bottom plate 20 .
  • the jacket body 17 is pushed onto the side wall 21 in the direction of impact 10 .
  • the inner diameter of the sealing ring 18 is preferably equal to or slightly larger than the outer diameter of the side wall 21, but less than the diameter of the bottom plate 20 and smaller than the outer diameter of the shell body 17.
  • the sealing ring 18 is along the working axis 4 between the bottom plate 20 and the shell body 17 caught.
  • the sealing ring 18 is preferably slightly radially beyond the bottom plate 20 and the shell body 17 .
  • the sealing ring 18 is airtight under a radial bias on the inner surface 15 of the guide tube 14 at.
  • the sealing ring 18 may have an inner diameter which is slightly larger than the outer diameter 25 of the side wall 21 . Between the sealing ring 18 and the base body 16 results in a gap in the radial direction, in which the sealing ring 18 can deflect.
  • An additional sealing element 32 may 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 with respect to the radial outer surface of the side wall 21 .
  • the sealing element 32 prevents an exchange of air from the groove 27 in the inner cavity of the excitation piston 13.
  • the sealing element 32 may be an O-ring as shown, or inter alia alternatively by a press fit, by lamellae on the Radial inner surface of the sheath body 17, be formed by fins 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 allows a permanent seal on the guide tube 14 .
  • a sealing ring 18 of this hardness is sufficiently elastically deformable to compensate for unevenness of the guide tube 14 .
  • the sealing ring 18 is already significantly deformed during the expansion of the inner diameter of the sealing ring 18 to the outer diameter of the sheath body 17 .
  • the residual plastic strain after stretching is greater than 0.2%.
  • the sealing ring 18 can therefore not be pushed over the pre-assembled jacket body 17 during assembly, without being damaged. For such a mounting a softer sealing ring 18 with a hardness between 70 Shore and
  • sealing ring 18 is polyphthalamide.
  • sealing ring 18 may also be made of a brass alloy.
  • a bearing for a connecting rod 33 is formed.
  • the exemplary bearing is formed by a first bearing shell 34 and a second bearing shell 35 , which store along the working axis 4 between them a bolt 36 .
  • 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 on the bolt 36 .
  • the bolt 36 is monolithically formed with the connecting rod 33 .
  • the two bearing shells 34, 35 are within the cup-shaped base body 16.
  • the side wall 21 includes the bearing shells 35.
  • the sheath body 17 secures by means of a cover plate 37, the two bearing shells 34, 35.
  • the second bearing shell 35 may be formed as part of the sheath body 17 .
  • the racket 9 is arranged in the guide tube 14 .
  • the racket 9 is guided by the guide tube 14 along the working axis 4 .
  • the racket 9 is located in the direction of impact 10 after the exciter piston 13.
  • the racket 9 is flush with the inner surface 15 of the guide tube 14 at.
  • the cross-sectional profile of the racket 9 corresponds to the hollow profile of the guide tube 14.
  • the racket 9 closes the guide tube 14 in the direction of impact 10th
  • the excitation piston 13 and the racket 9 close along the working axis 4 from a pneumatic chamber 23 .
  • the pneumatic chamber 23 is located between the excitation piston 13 and the racket 9.
  • the pneumatic chamber 23 forms the air spring, which couples the movement of the racket 9 to the movement of the exciter piston 13 .
  • the guide tube 14 closes off the pneumatic chamber 23 in the radial direction.
  • the excitation piston 13 is connected via a drive train 38 to the electric motor 12 .
  • the powertrain 38 includes a converter 39 which converts the rotational motion of the electric motor 12 into a translational motion.
  • the exemplified converter 39 is based on an eccentric wheel driven by the electric motor 12 and the connecting rod 33 anchored in the excitation piston 13.
  • An alternative embodiment uses a swash plate instead of an eccentric wheel, to which the connecting rod 33 acts.
  • the powertrain 38 may further include a reduction gear 40 and protective mechanisms, such as a slip clutch 41 .
  • the mechanical and rigid connection of the hammer piston 13 to the electric motor 12 ensures a synchronous movement of the electric motor 12 and hammer piston. 13
  • the electric motor 12 is powered by the power supply.
  • the electric motor 12 may 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 operated by the hand holding the handle 5 .
  • Fig. 4 shows a further hammer piston 13.
  • the hammer piston 13 has the base member 16, the shell body 17 and the sealing ring 18.
  • the sheath body 17 has radially inwardly projecting lugs 43, 16 which can engage in a corresponding opening of the base body.
  • the side wall 21 is so far elastic in the area that the jacket body 17 can be pushed by bending the side wall 21 . Once the lugs 43 are at the height of the opening, the side wall 21 returns to its original shape and locks the lugs 43rd
  • the shell body 17 is airtightly connected in radial direction with the side wall 21 of the base body sixteenth
  • the exemplary embodiment uses for this purpose fins 44, which are formed on the inside of the sheath body 17 .
  • the fins 44 may 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)
EP16176080.6A 2016-06-24 2016-06-24 Machine-outil portative Withdrawn EP3260239A1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
EP16176080.6A EP3260239A1 (fr) 2016-06-24 2016-06-24 Machine-outil portative
CN201780039242.3A CN109311145B (zh) 2016-06-24 2017-06-20 手持式工具机
EP20171057.1A EP3722048B1 (fr) 2016-06-24 2017-06-20 Machine-outil portative
EP17733771.4A EP3475031B1 (fr) 2016-06-24 2017-06-20 Machine-outil portative
US16/311,570 US11117250B2 (en) 2016-06-24 2017-06-20 Hand-held machine tool
PCT/EP2017/065060 WO2017220561A1 (fr) 2016-06-24 2017-06-20 Machine-outil portative

Applications Claiming Priority (1)

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

Publications (1)

Publication Number Publication Date
EP3260239A1 true EP3260239A1 (fr) 2017-12-27

Family

ID=56292481

Family Applications (3)

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

Family Applications After (2)

Application Number Title Priority Date Filing Date
EP17733771.4A Active EP3475031B1 (fr) 2016-06-24 2017-06-20 Machine-outil portative
EP20171057.1A Active EP3722048B1 (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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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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DE102007062246A1 (de) 2007-12-21 2009-06-25 Robert Bosch Gmbh Handwerkzeugmaschine
DE102008022454B4 (de) 2008-05-08 2014-06-26 Aeg Electric Tools Gmbh Bohrhammer
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DE102009026542A1 (de) * 2009-05-28 2010-12-09 Hilti Aktiengesellschaft Werkzeugmaschine
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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

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US20190184538A1 (en) 2019-06-20
CN109311145B (zh) 2022-02-25
WO2017220561A1 (fr) 2017-12-28
EP3722048A1 (fr) 2020-10-14
EP3722048B1 (fr) 2022-01-12
EP3475031B1 (fr) 2020-05-13
US11117250B2 (en) 2021-09-14
EP3475031A1 (fr) 2019-05-01
CN109311145A (zh) 2019-02-05

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