EP1136190B1 - Elément de protection pour prévenir la pénétration des contaminants pour un outil à percussion actionné hydrauliquement - Google Patents

Elément de protection pour prévenir la pénétration des contaminants pour un outil à percussion actionné hydrauliquement Download PDF

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Publication number
EP1136190B1
EP1136190B1 EP01105983A EP01105983A EP1136190B1 EP 1136190 B1 EP1136190 B1 EP 1136190B1 EP 01105983 A EP01105983 A EP 01105983A EP 01105983 A EP01105983 A EP 01105983A EP 1136190 B1 EP1136190 B1 EP 1136190B1
Authority
EP
European Patent Office
Prior art keywords
seal
striking
tool
protective device
housing
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
EP01105983A
Other languages
German (de)
English (en)
Other versions
EP1136190A3 (fr
EP1136190A2 (fr
Inventor
Thomas Deimel
Markus Mellwig
Heinz-Jürgen Dr.-Ing. Prokop
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
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 EP1136190A2 publication Critical patent/EP1136190A2/fr
Publication of EP1136190A3 publication Critical patent/EP1136190A3/fr
Application granted granted Critical
Publication of EP1136190B1 publication Critical patent/EP1136190B1/fr
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
    • B25D17/26—Lubricating
    • B25D17/265—Lubricating the lubricant being entrained to the machine parts by the driving fluid
    • 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
    • B25D17/20—Devices for cleaning or cooling tool or work
    • B25D17/22—Devices for cleaning or cooling tool or work using pressure fluid
    • 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 invention relates to a protective device for preventing the Penetration of contaminants on a fluid-operated Schlagtechnik, with one movably guided in a housing Impact tool - the means of a percussion piston in the direction of impact is driven - and a seal, at least indirectly on the one hand on the housing and on the other hand on the impact tool supported and their attachment portion either with respect to Housing or the impact tool is arranged stationary.
  • the invention has the object, the generic protection device in such a way that they prevent the ingress of contaminants following the Impact tool guide in the direction of the percussion piston prevented.
  • the object is achieved by a protective device with the features of claim 1.
  • the basic idea of the invention consists in arranging the seal between the inner guide section of the striking tool guide and the theoretical impact plane of the percussion piston on the percussion tool in such a way that it moves relative to the attachment section of the seal and is in contact therewith standing counter surface is wear-free.
  • the counter surface - which is run over by the voltage applied to her seal on the occasion of the reciprocating motion of the impact tool within the housing - to protect the seal against premature damage in a region arranged, which also with the widest consideration of the expected wear as much as possible.
  • the seal is arranged so that seen in the opposite direction to the direction of impact - behind the inner Guide section is effective. In this way, the intrusion unwanted impurities from the area of the inner Guide section in the direction of the percussion piston as far as possible be prevented, as long as the function of the seal is not or not is significantly impaired.
  • the invention can be further developed in that the seal - seen in the opposite direction to the direction of impact - is arranged behind the inner guide portion and in front of a housing attached to the bouncing ring, which limits the movement of the impact tool in the opposite direction to the direction of impact as a stop (claim 2).
  • This arrangement has the consequence that the seal - seen in the axial direction of the impact tool - assumes a position between the (the percussion piston facing) inner guide portion and the bounce ring.
  • the seal may also be displaced further in the direction of the theoretical impact plane of the percussion piston.
  • the seal - seen in the longitudinal direction of the impact tool - between the theoretical impact plane of the percussion piston and a housing attached to the bouncing ring is arranged, which limits the movement of the impact tool in the opposite direction to the direction of impact and seen in this direction behind the inner guide portion as a stop (Claim 3).
  • the maintenance of the striking mechanism and the replacement of the seal can be simplified in that the latter is connected via its attachment portion with an interchangeable receiving sleeve, which in turn is attached either to the impact tool or the housing (claim 4). If the latter variant is used, the receiving sleeve may also form part of the bounce ring (claim 5), ie be combined with this to form a unit which is in communication with the housing.
  • the protective device is designed such that the Movement of the impact tool in the axial direction shorter is the length of the counterface on which the seal is supported (Claim 6). In this way, even with longer operating time be ensured that the counter surface of otherwise occurring wear is not included and thus the seal is protected against premature damage.
  • the seal basically as an inner seal (claim 7) or as an outer seal Be formed (claim 9); This has the consequence that the Attachment portion of the seal either with respect to the housing or is held stationary with respect to the impact tool.
  • the wear of the counter-surface to be crossed by this fact can be realized that the diameter of the impact tool over the length of the counter surface is smaller than its diameter in the region of the inner guide portion (claim 8);
  • the diameter difference should have an order of magnitude which takes into account the expected wear in the region of the inner guide section.
  • the present embodiment (according to claim 7 and / or 8) can be further developed in that the inner diameter of the inner seal in the installed state is greater than the diameter of the percussion piston facing impact surface of the striking tool. Accordingly, the seal is widened during installation of the striking tool, so that it bears with prestressing elastic on the relatively movable counter surface.
  • the seal has at least one obliquely extending in the direction of impact, elastically held on the mating surface in abutment sealing lip on (claim 10). It has proven to be expedient to dimension the ratio of the length of each sealing lip and the maximum possible transverse offset of the striking tool with respect to the housing at least 1, preferably with more than 1 to 3 (claim 11). In this way it is ensured that the seal develops a sufficient sealing effect even in the expected transverse movements of the impact tool within the housing.
  • the fluid-operated impact mechanism in the form of a hydraulic hammer can - apart from the protective device for preventing the penetration of impurities to be described - be formed in a conventional manner and has not shown main components in a housing upper part in the longitudinal direction movable percussion piston under Action of a control alternately performs a stroke in the direction of impact (arrow 1) and in the opposite direction to the direction of impact a return stroke.
  • the percussion piston protrudes (in the drawing from the right side) into a lower part designed as a housing 2 and transmits its impact energy via the impact surface 3a facing it to an impact tool in the form of a chisel 3.
  • the theoretical impact plane, in which the percussion piston impinges on the impact surface 3 a is indicated by a dot-dash line 4.
  • the housing 2 has two longer bore sections 2a and 2b, which merge into one another via a short, narrowed bore section 2c.
  • a striking tool guide is fastened to the movable support of the bit 3 in the housing 2, which - seen in the opposite direction to the direction of impact (arrow 1) - consists of an outer guide section 5a and an inner guide section 5b spatially separated therefrom.
  • two oval-like support elements 6 are further fixed in place, which limit the range of motion of the bit 3 in the direction of impact (arrow 1), ie in the illustration to the left.
  • the chisel 3 has in the region of the guide portions 5a, 5b on this matched guide surfaces 3b and 3c, which pass in the region of the holding elements 6 in a longitudinal section 3d with the holding elements associated flats or milled.
  • the seal 7 is further arranged such that its sealing lip 7b elastic to a wear-free counter surface 3e of the chisel 3 in Investment is held.
  • the diameter of the counter surface 3e is taking into account the maximum permissible wear in the Range of impact tool guide and consequently occurring Transverse movements of the chisel 3 - deliberately smaller than that Diameter of the longitudinal section 3c in the region of the inner Guide section 5b. In this way it is ensured that the Sealing lip 7b always with a counter surface with ongoing Surface texture interacts.
  • the seal 7 in Simplest case only with a sealing lip 7b equipped in Impact direction (arrow 1) obliquely and thereby the gap between the removable receiving ring 8 and the wear-free counter surface 3e sealingly bridged.
  • the length of the sealing lip 7b is dimensioned such that the ratio of their length and the greatest possible Transverse offset of the bit 3 with respect to the housing 2 a value greater than 1.
  • the diameter of the sealing lip 7b in the installed state is greater than the diameter of the impact surface 3a: the latter goes over to form a truncated cone portion 3f in the larger diameter counter surface 3e. Due to the formation of the mating surface 3e and the truncated cone portion 3f relative to the bouncing ring 9, the chisel 3 - seen in the opposite direction to the direction of impact (arrow 1) - take only a retracted end position in which the impact surface 3a at the level of the bounce ring 9 and before narrowed bore section 2c is located. To ensure that the sealing lip 7b is supported only on the wear-free mating surface 3e, the range of motion of the chisel 3 in the axial direction is shorter than the length of the mating surface 3e run over by the sealing lip.
  • the embodiment according to FIG. 2 differs essentially characterized by the embodiment shown in Fig. 1 that the between the inner guide portion 5b and the bounce ring 9th located seal is formed as an outer seal 10. Accordingly, the attachment portion 10a is the Outer seal relative to the chisel 3 held stationary while the Sealing lip 10b resiliently abuts a counter surface 2e. This poses a wear-free bore section, which is - in Opposite direction to the direction of impact (arrow 1) seen - on the inner Guide section 5b connects.
  • the outer seal 10 has a sealing lip 10b running obliquely in the direction of impact (arrow 1), ie the sealing lip 10b is inclined in the impact direction on the wear-free counter surface 2e, starting from its fastening section 10a on the chisel 3. Furthermore, the length of the sealing lip 10b is dimensioned such that it develops a sufficient sealing effect even in the expected transverse movements of the bit 3 within the housing 2, thus shielding the gap between the bit 3 and the counter surface 2e towards the bouncing ring 9 reliable.
  • the seal designed as an inner seal 11-seen in the opposite direction to the direction of impact (arrow 1) - is arranged behind this and before the theoretical impact plane 4, following the rebound ring 10.
  • the bit 3 has an extension which extends in the opposite direction to the direction of impact (arrow 1) beyond the truncated cone section 3f and one with the inner seal 11 cooperating mating surface 2f represents.
  • the counter surface projects through the bore section 2c into the bore section 2b, in which the theoretical impact plane 4 also lies.
  • the length of the counter surface 2f in the axial direction is dimensioned so large that the impact surface 3a in the extended end position of the bit 3 (ie, in the illustration to the left extended end position) has sufficient distance to the sealing lip 11b.
  • the axial length of the mating surface 2f is dimensioned such that the length traveled by the sealing lip is shorter than the total available, the movement of the chisel 3 adapted length of the mating surface 2f.
  • the sealing lip 11b is also supported in the (to the right) retracted end position of the chisel 3 with a sufficient distance from the rebound ring 9 on the counter surface 2f, so that occurring in the region of the truncated cone portion 3f wear phenomena not up in can affect the sealing area.
  • the embodiment in question can also be modified to the effect that the outer seal 11 is connected via its attachment portion 11a with an exchangeable receiving sleeve.
  • all embodiments can be equipped with seals which have a plurality of sealing lips connected in series.
  • this is Housing 2 with a longitudinally extending lubricant supply channel 12 equipped, the lubricant on the one hand via a Inclined portion 12a in the region of the outer guide portion 5a and on the other hand via a transverse bore 12b in the region of inner guide section 5b initiates.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Earth Drilling (AREA)
  • Sealing Devices (AREA)
  • Sealing With Elastic Sealing Lips (AREA)
  • Vehicle Body Suspensions (AREA)
  • Image-Pickup Tubes, Image-Amplification Tubes, And Storage Tubes (AREA)
  • Switches With Compound Operations (AREA)

Claims (11)

  1. Dispositif de protection destiné à prévenir la pénétration d'impuretés sur un outil à percussion actionné par fluide, avec un ciseau à percussion (3) qui est mené de manière mobile dans un carter (2) et qui est entraíné dans la direction de percussion (flèche 1) au moyen d'un piston percutant, et avec un joint d'étanchéité qui, au moins indirectement, prend appui sur ledit carter (2) d'un côté et sur le ciseau à percussion (3) de l'autre côté et dont la section de fixation est disposée à poste fixe soit par rapport au carter (2) soit par rapport au ciseau à percussion (3),
    caractérisé par le fait que ledit joint d'étanchéité (7, 10 ou bien 11) est disposé de telle façon entre la section de guidage (5b) intérieure - vue dans le sens opposé à la direction de percussion (flèche 1) - du guide (5a, 5b) du ciseau à percussion et le plan théorique (4) dans lequel le piston percutant donne contre le ciseau à percussion (3), que la contre-surface (3e, 2e ou bien 2f) qui peut être déplacée relativement à la section de fixation (7a, 10a ou bien 11a) du joint d'étanchéité (7, 10 ou bien 11) et qui est en contact avec ce dernier n'est pas soumise à l'usure.
  2. Dispositif de protection selon la revendication 1, caractérisé par le fait que le joint d'étanchéité (7 ou bien 10) est disposé - vu dans le sens opposé à la direction de percussion (flèche 1) - après la section intérieure de guidage (5b) et en amont d'une bague de butée (9) qui est fixée sur le carter (2) et qui limite, en tant que butée, la marge de mouvement du ciseau à percussion (3) dans le sens opposé à la direction de percussion (flèche 1).
  3. Dispositif de protection selon la revendication 1, caractérisé par le fait que le joint d'étanchéité (11) est disposé - vu dans le sens longitudinal du ciseau à percussion (3) - entre le plan de heurt (4) théorique du piston percutant et une bague de butée (9) fixée sur le carter (2), qui, en tant que butée, limite la marge de mouvement du ciseau à percussion (3) dans le sens opposé à la direction de percussion (flèche 1) et qui, vu dans cette direction, est située après la section intérieure de guidage (5b).
  4. Dispositif de protection selon l'une au moins des revendications précédentes, caractérisé par le fait que le joint d'étanchéité (7) est relié par l'intermédiaire de sa section de fixation (7a) à une douille de réception (8) échangeable qui, de son côté, est fixée soit sur le ciseau à percussion (3) soit sur le carter (2).
  5. Dispositif de protection selon la revendication 4, caractérisé par le fait que ladite douille de réception (8) forme une partie constituante de la bague de butée (9).
  6. Dispositif de protection selon l'une au moins des revendications précédentes, caractérisé par le fait que la marge de mouvement du ciseau à percussion (3) dans la direction axiale est plus courte que la longueur de la contre-surface (3e, 2e ou bien 2f) appuyant le joint d'étanchéité (7, 10 ou bien 11).
  7. Dispositif de protection selon l'une au moins des revendications précédentes, caractérisé par le fait que la section de fixation (7a ou bien 11a) du joint d'étanchéité réalisé comme joint intérieur (7 ou bien 11) est maintenue à poste fixe par rapport au carter (2).
  8. Dispositif de protection selon la revendication 7, caractérisé par le fait que le diamètre du ciseau à percussion (3) sur la longueur de la contre-surface (3e ou bien 2f) est plus petit que son diamètre dans la zone de la section intérieure de guidage (5b).
  9. Dispositif de protection selon l'une au moins des revendications précédentes 1 à 6, caractérisé par le fait que le joint d'étanchéité qui est réalisé comme joint extérieur (10) est maintenu, par sa section de fixation (10a), à poste fixe par rapport au ciseau à percussion (3).
  10. Dispositif de protection selon l'une au moins des revendications précédentes, caractérisé par le fait que le joint d'étanchéité (7, 10 ou bien 11) présente au moins une lèvre d'étanchéité (7b, 10b ou bien 11 b) qui s'étend en biais dans la direction de percussion (flèche 1) et qui est maintenue élastiquement en appui sur la contre-surface (3e, 2e ou bien 2f).
  11. Dispositif de protection selon la revendication 10, caractérisé par le fait que le rapport de la longueur de chaque lèvre d'étanchéité (7b, 10b ou bien 11b) au déport transversal le plus grand possible du ciseau à percussion (3) par rapport au carter (2) est d'au moins 1, de préférence supérieur à 1 - 3.
EP01105983A 2000-03-16 2001-03-10 Elément de protection pour prévenir la pénétration des contaminants pour un outil à percussion actionné hydrauliquement Expired - Lifetime EP1136190B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10012916A DE10012916A1 (de) 2000-03-16 2000-03-16 Schutzvorrichtung zum Verhindern des Eindringens von Verunreinigungen an einem fluidbetriebenen Schlagwerk
DE10012916 2000-03-16

Publications (3)

Publication Number Publication Date
EP1136190A2 EP1136190A2 (fr) 2001-09-26
EP1136190A3 EP1136190A3 (fr) 2001-10-04
EP1136190B1 true EP1136190B1 (fr) 2005-07-13

Family

ID=7635016

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01105983A Expired - Lifetime EP1136190B1 (fr) 2000-03-16 2001-03-10 Elément de protection pour prévenir la pénétration des contaminants pour un outil à percussion actionné hydrauliquement

Country Status (6)

Country Link
US (1) US6648079B2 (fr)
EP (1) EP1136190B1 (fr)
JP (1) JP2001310272A (fr)
AT (1) ATE299418T1 (fr)
DE (2) DE10012916A1 (fr)
ES (1) ES2246264T3 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100807685B1 (ko) * 2001-11-22 2008-02-28 주식회사 포스코 리볼빙 스크린의 부착광 제거장치
SE528035C2 (sv) * 2004-03-12 2006-08-15 Atlas Copco Constr Tools Ab Hydraulisk brythammare med smord verktygshylsa
JP2008012659A (ja) * 2006-07-01 2008-01-24 Black & Decker Inc ハンマードリル用ビートピース支持構造
US8146677B2 (en) * 2008-06-25 2012-04-03 Jae-Mog Kim Hydraulic breaker assembly
US8360167B2 (en) * 2010-08-11 2013-01-29 Caterpillar Inc. Composite seal for a hydraulic hammer
KR20130098068A (ko) * 2012-02-27 2013-09-04 주식회사수산중공업 브레이커의 프론트 커버
US10065301B2 (en) * 2015-02-05 2018-09-04 Caterpillar Inc. Lower buffer and bushing protector

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2867462A (en) * 1953-12-28 1959-01-06 Borg Warner Housing confined lip seal
US3371730A (en) * 1965-09-20 1968-03-05 James L. Newman Mechanical drilling jar
US3585301A (en) * 1968-03-04 1971-06-15 James L Newman Said wiper ring for downhole tool
AT334831B (de) * 1975-07-08 1976-02-10 Inst Gornogo Dela Sibirskogo O Umkehrbare pressluft-schlagvorrichtung zur bildung von bohrlochern im boden durch verdichten desselben
US5143162A (en) * 1991-09-27 1992-09-01 Ingersoll-Rand Company Device for removing debris from a drillhole
US5562170A (en) * 1995-08-30 1996-10-08 Ingersoll-Rand Company Self-lubricating, fluid-actuated, percussive down-the-hole drill
DE19628815C2 (de) * 1996-07-17 1999-02-25 Krupp Berco Bautechnik Gmbh Schutzvorrichtung zum Verhindern des Eindringens von Verunreinigungen an einem fluidbetriebenen Schlagwerk
FI108409B (fi) * 1997-12-11 2002-01-31 Tamrock Oy Sovitelma hydraulisen rikotuslaitteen yhteydessõ
DE19801297C1 (de) * 1998-01-16 1999-04-01 Wolfgang Moers Kugellagerartig ausgestaltete Führungsbuchse für einen Hydraulikhammer

Also Published As

Publication number Publication date
EP1136190A3 (fr) 2001-10-04
EP1136190A2 (fr) 2001-09-26
DE10012916A1 (de) 2001-09-20
DE50106713D1 (de) 2005-08-18
US6648079B2 (en) 2003-11-18
ES2246264T3 (es) 2006-02-16
ATE299418T1 (de) 2005-07-15
JP2001310272A (ja) 2001-11-06
US20010022227A1 (en) 2001-09-20

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