EP1342539B1 - Halterung für die Innendichtung an einem fluidbetriebenen Schlagwerk - Google Patents

Halterung für die Innendichtung an einem fluidbetriebenen Schlagwerk Download PDF

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Publication number
EP1342539B1
EP1342539B1 EP03000166A EP03000166A EP1342539B1 EP 1342539 B1 EP1342539 B1 EP 1342539B1 EP 03000166 A EP03000166 A EP 03000166A EP 03000166 A EP03000166 A EP 03000166A EP 1342539 B1 EP1342539 B1 EP 1342539B1
Authority
EP
European Patent Office
Prior art keywords
tool
extension
tool guide
inner seal
guide
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.)
Expired - Lifetime
Application number
EP03000166A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1342539A1 (de
Inventor
Thomas Deimel
Hans-Jürgen Schneider
Christian Dörsch
Markus Mellwig
Torsten Ahr
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.)
Construction Tools GmbH
Construction Tools PC AB
Original Assignee
Atlas Copco Construction Tools GmbH
Atlas Copco Construction Tools AB
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 Atlas Copco Construction Tools GmbH, Atlas Copco Construction Tools AB filed Critical Atlas Copco Construction Tools GmbH
Publication of EP1342539A1 publication Critical patent/EP1342539A1/de
Application granted granted Critical
Publication of EP1342539B1 publication Critical patent/EP1342539B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • 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
    • B25D2217/0057—Details related to cleaning or cooling the tool or workpiece
    • B25D2217/0065—Use of dust covers

Definitions

  • the invention relates to a holder for the inner seal on a fluid-operated percussion with a housing part which shields the percussion at least the front side against the outside environment and in which a percussion driven impact tool protrudes, with a replaceable outer seal on the housing part at the passage opening for the percussion is arranged and - the impact tool transverse to its longitudinal axis at most with a small distance enclosing - is designed to be movable in this transverse direction, and with an outer seal against the direction of impact of the impact tool downstream inner seal, which bears against the impact tool outside of the tool guide elastic.
  • the inner seal is removably attached to an extension of the tool guide in the direction of impact, said extension enclosing the impact tool in the region of the inner seal with a distance which is greater than the greatest possible transverse offset of the striking tool.
  • a generic holder is in the context of a protection device on a fluid-operated percussion in the pre-publication DE-A1-19628815 described.
  • the known protective device is intended to contribute in particular to increase the functional reliability of the striking mechanism by reducing wear in the area of the tool guide and to reduce the repair and maintenance costs.
  • This is achieved in that the outer seal - for example in the form of a movably mounted cross slide - at the same time effective as a mechanical shield and serves as Vorabstreifer, while the outer seal downstream inner seal to prevent the penetration of finer impurities in the area of the tool guide.
  • the percussion itself can be designed to be arbitrary, as far as it has a reciprocating in a tool guide stroke tool, which is driven by the percussion.
  • the invention has for its object to improve the known protection device with respect to the holder for the associated inner seal and thereby increase the efficiency of the percussion as a whole.
  • the novel holder should be such that in the case of serious incidents - especially when breaking the impact tool - the expansion and replacement of the tool guide itself can be omitted, as far as this has not been affected by the accident also affected.
  • the basic idea of the invention is then to carry out the existing extension of an elastomer for supporting the inner seal as an independent, inherently elastic support member which forms on its side facing away from the inner seal back with the tool guide a releasable, effective manner of a snap connection compound in that the extension in the receiving section designed for its attachment engages in the tool guide.
  • the extension is so elastic that, due to its elastic deformability, it can be releasably engaged with the receiving portion designed for its attachment and maintains the connection made therewith, due to its elastic behavior, as long as the holding forces between the extension and the tool guide do not overcome, external forces occur.
  • the extension and the receiving portion of the tool guide are so - adapted to each other - taking into account the elasticity of the extension that the extension is immovably connected after insertion into the receiving portion with the required deformation for locking with the receiving portion, as long as the separation from the receiving portion triggering measures are initiated or correspondingly large forces trigger circumstances. If outside the outer end portion of the tool guide a tool breakage occurs, often only the extension along with inner seal is damaged by the fragment, so that only the two parts mentioned - without removing the tool guide itself - need to be replaced.
  • the extension due to their elastic properties in the correspondingly adapted receiving portion of the Tool guide can be used and maintains the compound thus produced, so to speak, automatically.
  • the requirements for the extension are particularly well met if a thermoplastic elastomer is used; in particular polyurethane (claim 2).
  • the extension can also be made of other materials, if they have in the context of interest here similar properties of the extension result.
  • the subject invention may be further characterized in that the connection between the tool guide and the extension is at least partially formed within the tool guide (claim 3) or that the extension is supported on the side facing away from the impact tool outside of the tool guide at this (claim 4).
  • the invention also relates to embodiments in which the extension is supported on the impact tool facing the inside of the tool guide releasably on this.
  • the tool guide as part of the compound at least one annular groove-like depression (claim 5).
  • the extension due to their elastic deformability engage with the result that a positive and / or non-positive connection with the tool guide is formed.
  • the extension may be formed in the tool guide and a plurality of spaced annular groove-like depressions, in which the extension is supported by a plurality of adapted ring-like projections.
  • the at least one annular groove-like recess on the side facing away from the impact tool outside of the tool guide is formed on this (claim 6); This has the advantage that the receiving portion of the tool guide is located in a less vulnerable area of the striking mechanism.
  • the at least one annular groove-like depression can also be arranged on the inside of the tool guide facing the impact tool.
  • the annular groove-like depression is additionally undercut at least on the side facing the inner seal or on the side facing away from this (claim 7).
  • the ringnut shame depression is partially closed by a circumferential projection, so in cross-section represents a cavity with an opening which either faces the impact tool or lies on the side facing away from the tool guide.
  • the annular groove-like depression may also be formed as an end-side depression which extends from the end face of the tool guide facing the inner seal (claim 8).
  • the extension which has a mating surface adapted to the respective depression, can be connected to the tool guide without major deformation.
  • the end-side recess in the direction of the tool guide undercut (claim 9) so that can be produced with a correspondingly adapted design of the extension on the front side recess a positive connection.
  • the reliability of the novel holder can be erfoderlich briefly also increased by the extension is additionally held by means of at least one annular securing element in the direction of the receiving portion of the tool guide in abutment (claim 10).
  • the securing element is pushed either on the outside or on the inside of the extension and supports the outgoing of the extension itself holding force.
  • the ring-like securing element can otherwise be of any desired design, that is to say in particular also like a bush or helical.
  • Fuse element realized as a spring element to ensure that the extension - despite the use of the fuse element - can dissolve inadmissible high force from the tool guide and thereby further damage is avoided.
  • the extension has at least one annular latching lug which engages in the receiving portion of the tool guide (claim 11).
  • at least one latching lug of the extension be designed such that it is frictionally supported on the receiving portion (claim 12). This can be realized in a simple manner in that the locking lug is dimensioned larger than the relevant dimension of the receiving them ringnutierin recess and consequently engages under bias in the recess.
  • the tool guide may have at least one end-side recess and additionally either on the outer side facing away from the impact tool or on the inside facing the impact tool at least one annular groove-like depression, wherein the extension is equipped with adapted to the respective wells and supported in these protrusions.
  • the holder can be further configured in that the wall thickness of the extension - with the exception of at most their connection with the forming end portion and its inner seal bearing end portion - in the direction of the end portion decreases (claim 13).
  • the wall thickness changes in the simplest case in a straight line; instead, a curved curve can also be used.
  • a striking tool in the form of a chisel 3 is supported with the longitudinal axis 3a in the longitudinal direction movable.
  • the movement of the chisel 3 in the direction of impact is indicated by an arrow 4.
  • the pendulum movements possibly carried out by the chisel 3 are - greatly enlarged - schematized in each case by dashed lines 3b and 3c.
  • a housing part 5 is attached as an extension, which front side (ie in the illustration below) removably receives an exchange component 6.
  • the housing part 5 is provided with a recess 7 which is dimensioned slightly lower than the height of the replacement component 6 and whose diameter is adapted to the diameter of the replacement component.
  • the parts 5 and 6 are releasably secured to each other via bolts 8.
  • the replacement component 6 in turn consists of a front plate 6a and a back plate 6b. The latter are such that on the one hand they define a sufficiently large passage opening 6c for the chisel 3 and on the other hand - transverse to the longitudinal axis 3a - an annular space 9; in this an outer seal in the form of a plate-shaped cross slide 10 is movably mounted.
  • the height of the annular space 9 in the direction of the longitudinal axis 3 a is dimensioned slightly larger than the thickness of the transverse slide 10, so that this under the action of the transverse movements exporting chisel 3 with respect to the housing part 5 can be reciprocated as in itself rigid unit.
  • the wall 10a of the cross slide 10 limits its passage opening for the chisel 3, designed so that even transverse movements of the chisel 3 (indicated by the lines 3b and 3c) do not lead to tilting of the parts 3 and 10; for this purpose, the wall 10 a (deviating from the illustration) in the direction of the chisel 3 is convex.
  • the parts 6a and 6b are connected together (not shown); Accordingly, the exchange component 6 with the freely movable mounted therein cross slide 10 as a unit and be removed.
  • the cross slide 10 is - against the direction of impact (arrow 4) - downstream of the housing part 5, an inner seal 11, the sealing lip 11 a outside the tool guide 2 elastically abuts the chisel 3 and serves as a scraper for in the housing part 5 about penetrated impurities.
  • the inner gasket 11 is detachably secured to an extension 12 via an attachment groove 12b attached to the end portion 12a thereof (see Fig. 2 ).
  • the extension 12 encloses the chisel 3 in the region of the inner seal with a distance s which is greater than the greatest possible transverse offset of the chisel in this region (indicated by the lines 3b and 3c).
  • the length of the sealing lip 11 a is dimensioned so that the ratio of its length and the maximum transverse offset of the chisel 3 in the region of the sealing lip has a value greater than 2.
  • an elastomer extension 12 is designed as an independent, inherently elastic support member; this can on its initial portion 12c - which lies on the side facing away from the inner seal 11 back of the extension 12 - with a correspondingly adapted receiving portion 2a in the region of the end face 2b of the tool guide 2 a releasable, snap-type connection form an effective (see. Fig. 2 ).
  • the receiving portion 2a is provided with a spaced from the end face 2b, ringnutartigen recess 13 which is aligned transversely to the longitudinal axis 3a.
  • the initial section 12c of the extension 12 has a latching lug 14 which extends around in the manner of an annular shoulder and which is likewise spaced from the support surface 12d of the extension cooperating with the end face 2b.
  • the extension 12 Due to the elastic deformability of the extension 12, this can be moved relative to the tool guide 2 such that its locking lug 14 in the region of annular groove-like depression 13 passes and engages with the formation of the aforementioned detachable connection in the recess 13.
  • the connection formed in this way between the receiving section 2a and the initial section 12c remains due to the elastic deformability of the extension 12, as long as they do not act on any external forces which are greater than the outgoing of the extension holding force. If an impact tool breakage should occur in the region of the extension 12, the extension may initially deform under the action of the transverse forces occurring or be released from the receiving section 2a of the tool guide 2 in the event of excessive stress, thereby possibly preventing damage to at least the tool guide 2. Depending on the effects of the accident in question, it may also be possible to continue to use the separated extension 12, ie to connect it again to the receiving section 2a by latching.
  • connection between the receiving section 2a and the initial section 12c (cf. Fig. 2 ) Be further ensured that the height of the circumferential locking lug 14 (seen parallel to the longitudinal axis 3a) in the expansion state is greater than the height of the ringnutartigen recess 13 in the direction mentioned. Accordingly, the locking lug 14 is compressed upon insertion into the recess 13, with the result that the locking lug is also held non-positively in the receiving portion 2a.
  • the subject of the invention may also be designed such that the annular groove formed between the latching lug 14 and the end face 12d forms a frictional connection with the receiving section 2a.
  • the ringnut shame recess 13 is formed on the chisel 3 facing inside of the tool guide 2 at this; Furthermore, the effective inner diameter of the tool guide 2 and the inner diameter of the extension 12 in the region of its initial portion 12c adapted to each other so that the tool guide 2 to form a paragraph A in the Extension 12 passes. This is otherwise carried out in such a way that its wall thickness with constant outer diameter - apart from its initial portion 12c in the region of the receiving portion 2a - decreases steadily in the direction of the end portion 12a. In this way, it is ensured that the extension 12 is in the normal state outside of the effective range detected by the striking tool 3 (cf. Fig. 1 ) and may possibly detach from the receiving portion 2a of the tool guide 2.
  • FIG. 3 shows an embodiment of the subject invention, in which in the receiving portion 2a of the tool guide 2 in the direction of the latter (ie in the drawing up) undercut annular groove-like recess 15 is formed.
  • the recess 15 is again (as already with reference to the Fig. 1 and 2 explained) on the impact tool - and thus the longitudinal axis 3a - facing the inside of the tool guide 2 arranged on this. Due to the mentioned undercut, the recess 15 in the direction of the longitudinal axis 3a on an annular peripheral shoulder 2c. Accordingly, the opening (viewed parallel to the longitudinal axis 3a) of the recess 15 is dimensioned smaller than its total height in the direction mentioned.
  • the initial portion 12c of the extension 12 is provided with a peripheral locking lug 16 spaced from the end face 12d, which - as seen in cross section - is aligned substantially parallel to the longitudinal axis 3a. Only for reasons of presentation, in particular the dimension of the detent 16 is drawn exaggerated parallel to the longitudinal axis 3a; It goes without saying that the recess 15 and the detent 16 must be sized to each other in such a way that the detent 16 - can thread into the recess 15 - forming the desired releasable connection - and then retains the detent position, as long as not inadmissible high forces acting on the extension 12 and, if necessary, solve the connection between the receiving portion 2a and the initial portion 12c.
  • the receiving portion 2a and the initial portion 12c of the extension - with respect to the design and dimensioning in particular of the recess 15 and the locking lug 16 - be adapted to each other such that the locking lug 16 is held in the installed state frictionally in the recess 15.
  • extension 12 is an independent, in itself elastic support member forming extension 12 designed such that its inner diameter - with the exception of the initial portion 12c - steadily increases in the direction of the end portion 12a, and while maintaining a constant wall thickness.
  • Fig. 4 has the receiving portion 2a for the attachment of the inherently elastic extension 12 an annular groove-like recess 17 which - aligned transversely to the longitudinal axis 3a - on the impact tool (see Fig. 1 ) facing away from the outside of the tool guide 2 is formed on this.
  • the extension 12 is adapted to the receiving portion 2a in that its initial portion 12c has an annular locking lug 18 which projects in the direction of the longitudinal axis 3a and to facilitate the Einfädelungsvorgangs in the recess 17 has an inclined end edge 18a.
  • the locking lug on the end face 2b can be moved so far towards the receiving portion 2a, that the locking lug 18 finally engages in the annular groove-like recess 17 and thereby the extension 12 via its initial section 12c detachably connects with the tool guide 2.
  • This connection can either be intentional or eliminated in the event of a fault by sufficiently high transverse forces acting on the extension 12.
  • the compound produced between the sections 2a and 12c can be additionally assisted in that the latching lug 18 is manufactured with oversize and thus is also supported non-positively in the recess 17.
  • the compound in question can be additionally ensured that a spring ring 19 is pushed in height of the recess 17 from the outside to the extension 12.
  • This spring ring additionally generates a force component which tends to keep the latching lug 18 within the recess 17.
  • the extension 12 should have a corresponding position assurance, for example, in Fig. 4 indicated, the spring ring 19 receiving annular groove 20th
  • the extension 12 is otherwise formed such that its cross-section in the direction of the inner seal 11 decreases steadily, and while remaining constant inside diameter.
  • the inner diameter of the tool guide 2 is in the region of the receiving portion 2 a with a tapered transition in the inner diameter of the extension 12 over.
  • the embodiment according to Fig. 5 differs from the embodiment described above in that the receiving portion 2a of the tool guide 2 spaced apart annular groove-like recesses 17 and 21, in which the elastically deformable extension 12 is releasably supported via annular locking lugs 18 and 22 respectively.
  • the connection formed between the sections 2a and 12c can be additionally secured if necessary by a securing element pushed onto the extension 12 at the level of the receiving section 2a and fixed parallel to the longitudinal axis 3a to avoid undesired movements.
  • bracket corresponds to that according to Fig. 3 in that the receiving portion 2a also has an annular groove-like recess 23 which is undercut in the direction of the tool guide 2 (ie in the illustration above) and in which an annular detent 24 is supported in the installed state.
  • the latter can optionally be pressed into the recess 23 while generating a corresponding bias voltage.
  • Fig. 3 Notwithstanding the embodiment according to Fig. 3 is the annular groove-like recess 23 on the impact tool 3 (see Fig. 1 ) facing away outside of the tool guide 2 is formed; Accordingly, the locking lug 24 also protrudes in the direction of the impact tool 3 or on the longitudinal axis 3a within the recess 23. Apart from the configuration and arrangement of the locking lug 24 in the region of the receiving portion 2a, the inherently elastic extension 12 with attached thereto inner seal 11 is formed as well as in Fig. 4 shown embodiment.
  • the receiving portion 2a of the tool guide 2 is equipped on the one hand with an annular groove-like recess 25 which lies transversely to the longitudinal axis 3a aligned on the outside of the tool guide 2 and in the installed state an annular circumferential latching lug 26 with an inclined end edge 26a (corresponding to those in Fig. 4 ) protrudes.
  • the receiving portion 2a further has an outgoing from the end face 2b annular groove-like end-side recess 27 which widens in the direction of the tool guide 2 (ie in the drawing upwards), that is undercut.
  • the starting portion 12c of the extension 12 is - according to the formation of the receiving portion 2a - equipped with a further annular locking lug 28 having a head portion 28a with two retaining surfaces 28b.
  • the head part is fixed over the retaining surfaces 28b within the extension of the front side recess 27.
  • the holder described above thus results from the combination of a locking lug 26 and 28 latching on one side and one on the end side in matched annular groove-like recesses.
  • the advantage achieved by the invention is, in particular, that the tool guide by training the inner seal bearing extension as an independent support element can continue to protect against damage so far.
  • the extension provides a relatively inexpensive replacement part is about which can produce and maintain a detachable connection with the tool guide due to its elastic deformability, as long as the extension no unacceptably high external forces act. In case of failure, the extension of the tool guide can be solved, thereby possibly further damage to both the tool guide and possibly even on the extension itself be avoided.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Portable Nailing Machines And Staplers (AREA)
EP03000166A 2002-01-23 2003-01-07 Halterung für die Innendichtung an einem fluidbetriebenen Schlagwerk Expired - Lifetime EP1342539B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10202648 2002-01-23
DE10202648A DE10202648A1 (de) 2002-01-23 2002-01-23 Halterung für die Innendichtung an einem fluidbetriebenen Schlagwerk

Publications (2)

Publication Number Publication Date
EP1342539A1 EP1342539A1 (de) 2003-09-10
EP1342539B1 true EP1342539B1 (de) 2009-11-18

Family

ID=7712957

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03000166A Expired - Lifetime EP1342539B1 (de) 2002-01-23 2003-01-07 Halterung für die Innendichtung an einem fluidbetriebenen Schlagwerk

Country Status (6)

Country Link
US (1) US20030136586A1 (ja)
EP (1) EP1342539B1 (ja)
JP (1) JP4541648B2 (ja)
AT (1) ATE448915T1 (ja)
DE (2) DE10202648A1 (ja)
ES (1) ES2334897T3 (ja)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1669147B1 (de) 2004-12-13 2009-03-25 Schunk GmbH & Co. KG Spann- und Greiftechnik Spanneinrichtung
US9604109B2 (en) * 2008-03-28 2017-03-28 John Travis Gaffney Golf club head cover
EP2910337A1 (de) * 2014-02-20 2015-08-26 HILTI Aktiengesellschaft Werkzeughalter
US10065301B2 (en) * 2015-02-05 2018-09-04 Caterpillar Inc. Lower buffer and bushing protector
CN106545542B (zh) * 2016-11-23 2019-01-18 佛山市达曼森密封科技有限公司 一种破碎锤的密封与导向结构
US20240247587A1 (en) * 2023-01-20 2024-07-25 Joy Global Underground Mining Llc Cutting device and support for same

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US2568056A (en) * 1947-02-11 1951-09-18 Thompson Tool Company Bearing seal
US3275183A (en) * 1964-02-10 1966-09-27 Helmerich & Payne Secondary seal
FR2255816A5 (ja) * 1973-12-19 1975-07-18 Dechavanne Jacques
US4229010A (en) * 1978-12-20 1980-10-21 Bellofram Corporation Self-aligning shaft seal
US4208060A (en) * 1979-01-15 1980-06-17 Bellofram Corporation Sealed shaft
DE3209926C2 (de) * 1982-03-18 1984-06-14 Fa. Carl Freudenberg, 6940 Weinheim Lippendichtung
DE3610680A1 (de) * 1986-03-29 1987-10-01 Bosch Gmbh Robert Dichtung
US4712370A (en) * 1986-04-24 1987-12-15 The United States Of America As Represented By The Secretary Of The Air Force Sliding duct seal
US4821627A (en) * 1987-06-05 1989-04-18 Leigh Monstevens Keith V Piston and cylinder assembly
DE29510818U1 (de) * 1995-07-04 1995-09-14 Moers Baumaschinen GmbH, 58119 Hagen Führungsbuchse zum Einsatz in eine zylindrische Meißelbuchse als Bestandteil eines Hydraulik-Hammers
DE19628815C2 (de) * 1996-07-17 1999-02-25 Krupp Berco Bautechnik Gmbh Schutzvorrichtung zum Verhindern des Eindringens von Verunreinigungen an einem fluidbetriebenen Schlagwerk
DE19801297C1 (de) * 1998-01-16 1999-04-01 Wolfgang Moers Kugellagerartig ausgestaltete Führungsbuchse für einen Hydraulikhammer
US6116613A (en) * 1998-03-11 2000-09-12 Caterpillar Inc. Shaft wiper seal
DE19915022B4 (de) * 1999-04-01 2007-01-18 Dichtungstechnik G. Bruss Gmbh & Co. Kg Elastomerdichtung zwischen einem Kolben und einem Zylinder und/oder einem Schaft eines automatischen Kraftfahrzeuggetriebes
DE10041890C1 (de) * 2000-08-25 2001-11-22 Wolfgang Moers Führungsbüchse für die Aufnahme eines Hydraulikhammers

Also Published As

Publication number Publication date
ATE448915T1 (de) 2009-12-15
DE10202648A1 (de) 2003-07-31
US20030136586A1 (en) 2003-07-24
DE50312123D1 (de) 2009-12-31
EP1342539A1 (de) 2003-09-10
JP2003220575A (ja) 2003-08-05
ES2334897T3 (es) 2010-03-17
JP4541648B2 (ja) 2010-09-08

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