EP0849005B1 - Dispositif batteur pneumatique - Google Patents

Dispositif batteur pneumatique Download PDF

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Publication number
EP0849005B1
EP0849005B1 EP97121638A EP97121638A EP0849005B1 EP 0849005 B1 EP0849005 B1 EP 0849005B1 EP 97121638 A EP97121638 A EP 97121638A EP 97121638 A EP97121638 A EP 97121638A EP 0849005 B1 EP0849005 B1 EP 0849005B1
Authority
EP
European Patent Office
Prior art keywords
housing
piston
pipe
space
knocker
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
EP97121638A
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German (de)
English (en)
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EP0849005A1 (fr
Inventor
Dietrich Kröger
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.)
Netter GmbH
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Netter GmbH
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Filing date
Publication date
Application filed by Netter GmbH filed Critical Netter GmbH
Publication of EP0849005A1 publication Critical patent/EP0849005A1/fr
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Publication of EP0849005B1 publication Critical patent/EP0849005B1/fr
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
    • B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
    • B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
    • B06B1/18—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency wherein the vibrator is actuated by pressure fluid
    • B06B1/183—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency wherein the vibrator is actuated by pressure fluid operating with reciprocating masses

Definitions

  • the invention relates to a pneumatic knocker, also as an impact cylinder referred to, according to the preamble of claim 1.
  • a pneumatic knocker of this type is, for example, in DE-A-25 49 551 described. Basically, it would be possible with knockers of this type To vent the pressurization chamber suddenly into the environment. This However, the approach has several disadvantages. Because of the fast The piston moves back when it strikes in the spring chamber of the Cylinder a negative pressure, the stroke movement of the piston strong would affect. In principle, this disadvantage could be explained by this reduce that the spring chamber in turn through flow openings with the Environment is connected. However, this would mean that with everyone Stroke ambient air is sucked into the spring chamber, depending on Environmental conditions would lead to contamination of the cylinder. In addition, constant flow noise would be noticeable do.
  • a pneumatic linear vibrator is known from EP-A 330 687, in which the compressed air is fed through a pipe which passes through the interior of a drilled piston.
  • this pipe is only on his Air inlet ends open and closed at the opposite end, and the Air control takes place via narrow grooves and channels in the wall of this pipe and the inner wall of the bore of the piston.
  • An acceleration of the Flow of the working air is due to the specified version previously known linear vibrator not reached.
  • the invention has for its object a pneumatic knocker, such as it is known in its nature from DE-A 38 19 111, in its Mode of action still to be improved and production technology too simplify, in particular for use in pharmaceutical companies, in the food industry etc. a smooth, easy-to-clean surface is desired.
  • the one adjoining the channel in the piston is expedient Line routing at least partially as a pipe or pipe section educated. Because this tube also makes a transition from the piston movement the axial channel in the piston in the subsequent cable routing must ensure there are basically two ways of attachment this pipe.
  • the tube extends entirely through the spring chamber and is with one side on the End wall of the housing on the spring chamber side, where it is expedient communicates with the supply port for the printing medium.
  • the the other end of the tube protrudes into an axial bore of the piston, in which it is sliding and sealed.
  • the piston thus moves not only on the inner wall of the cylinder jacket but also on the Along the outside wall of this pipe.
  • one is in the spring chamber protruding pipe section directly on the spring side end face attached to the piston.
  • This pipe section thus moves with the Percussion piston back and forth.
  • the connection path for the to be fed Compressed air can also be made in different ways.
  • a first embodiment is the free end of the pipe section with a pressure-resistant metal bellows, the other end in turn with the Spring chamber-side housing end wall is connected and there with the Supply port for the print medium is in communication.
  • This Bellows take the play of movement carried by the percussion piston Pipe section on.
  • the metal bellows can with certain design even have a supportive spring effect.
  • the compressed air supply consists of the pipe section by another rigid or flexible pipe, for example a pressure-resistant hose extend and in a guide through the spring chamber end wall of the Pass through the housing.
  • the supply port for the print medium is expediently provided at the end of this pipe which is led out.
  • a disadvantage of this embodiment is that there may be - insofar no additional protective cap is provided - a moving part outside of the knocker housing, which is in the event of improper contact Injury.
  • the valve device is for Quick exhaust, however, within the pipe or pipe section arranged, which is part of the cable routing within the spring chamber forms.
  • This has the particular advantage that those forming the branch channel Passage openings in the pipe forming the conduit directly can be arranged near the spring chamber side of the piston, which means a shortest connection path for the overflow process between the pressurization chamber and the spring chamber. Since the Valve device expediently directly with the passage openings interacts, it can also be within the tube in immediate Provide near the piston.
  • the pipe arranged in the part of the conduit Valve device expediently has an axial inside the tube Directional control part, which in the rest position by a elastic member, for example a compression spring, against a stop is held and in this position the passage openings in the Spring chamber closes. If there is overpressure from the side of the Percussion piston is the control part against the restoring force of the elastic Link movable back to the passage openings in the spring chamber to release.
  • the control part is preferably part of a Control piston arrangement through which the described control functions be carried out automatically.
  • To the pressure medium for the operation of the knocker by the To be able to supply connecting channel to the pressurization chamber contains the spool assembly flow channels, which is a check valve included, which is present when the supply line is vented and as a result Overpressure from the side of the percussion piston and through the control part released flow openings in the spring chamber due to the excess pressure closes from the piston side, with overpressure from the supply port for the But the print medium opens.
  • the beating cycle of knockers of the type described here is common in many Cases by a 3/2-way valve arranged in the supply line for the pressure medium controlled.
  • the frequency is determined by the Valve control specified.
  • the arrangement of such an external valve is shown schematically in DE-A 38 19 111 and described.
  • Pneumatic knockers can also be operated automatically Control internally installed means, as described in DE-A 38 19 112 is.
  • the control of the supply of the pressure medium is in the generally made by the piston itself, which by Movement play releases or closes certain control openings.
  • the Means of self-control, as described in DE-A 38 19 112 can be used in an analogous manner on the pneumatic described here Knockers transferred, because narrower for the supply of the print medium Flow channels can be accepted.
  • vent opening also expediently provided with a check valve, which at higher ambient pressure closes and thus the inflow of ambient air into the spring chamber prevented.
  • This check valve can, for example, as Ball check valve formed and in an additional plate, e.g. out an elastomer, may be arranged on the inside of the spring chamber side Housing end wall is arranged. This design avoids the valve is to be built into the end wall of the housing. In this only a small hole needs to be provided, either aligns directly with the ball check valve or one elsewhere Opposite ring groove in the additional plate, in which the check valve opens.
  • Pneumatic knockers are usually on the side of the Pressurization chamber open and with one Provide mounting flange in which a ring seal is inserted.
  • the required counter surface for sealing the pressurization space is formed by a wall of the object with which the knocker is screwed tight.
  • Between this object and the flange can be also provide a spacer plate, the middle area of which by a Elastomer insert is formed.
  • Such an elastomer insert can also be used without Spacer plate inserted in the piston end of the knocker or in the Front of the piston itself.
  • the elastomer insert forms a softer stop surface for the piston.
  • a pneumatic knocker is partially schematic in longitudinal section shown.
  • the knocker has a housing 2, which consists of a cylindrical housing shell 4, an end wall 6 at one end of the Housing shell and a flange 8 at the other, open end of the Housing shell 2 is made.
  • the flange 8 is with an annular seal 10 its outside and provided with screw holes 12 on its circumference.
  • the knocker is thus sealing against the wall of a Screw-on object that is to be exposed to knocking.
  • Such an elastomer insert dampens the piston knocks to some extent and contributes to the extension the lifespan of the knocker and the stop surface as well as significantly Noise reduction at.
  • the knocker also has a percussion piston 18, which means Ring seals 20, which are inserted in grooves of the percussion piston, slidable in, Housing jacket 4 is guided.
  • the (based on the graphic representation) upper end face 22 of the percussion piston 18 is provided with a recess 24, in which a coil spring 26 is supported at one end while you the other end abuts against the end wall 6 of the housing 2 located above.
  • the through the housing shell 4, the upper end face 22 of the percussion piston and the housing end wall 6 limited space is referred to as spring space 28 which Upper housing end wall 6 also as a housing end wall on the spring chamber side.
  • the percussion piston 28 has a continuous, central axial bore 30 Mistake.
  • a pipe 34 passed through this against one Screwed locking ring, which with its free lower end in the central bore 30 of the piston protrudes and in this also by in the wall of the piston bore 30 embedded sealing rings 36 sliding and is performed sealing.
  • the tube 34 extends so far into the lower part of the Knockers in that the sealing rings 36 in the entire movement of the Remain effective.
  • the percussion piston 18 has a lower end face 38 on.
  • the housing shell 4 or the inside of the Flange 8 and a counter surface, not shown, of the object with which the knocker is screwed delimits a pressurization space 40 for the percussion piston.
  • the interior of the tube 34 forms one Connection channel 42 between a (not shown in detail) Supply connection for the compressed air at the upper end of the tube 34 at the arrow 44 into the pressurization chamber 40.
  • a (not shown in detail) Supply connection for the compressed air at the upper end of the tube 34 at the arrow 44 into the pressurization chamber 40 In an area of the pipe 34, which at no time during piston play is covered by the percussion piston there are openings 46 in the spring chamber 28 in the wall of the tube 34 provided that form a branch channel of the connecting channel 42.
  • Valve device 48 In the area of these openings 46 there is an automatic inside the tube 34 Valve device 48 is provided.
  • This valve device consists of a Control piston 50 which is arranged axially slidable in the upper part of the tube 34 and against which one is supported in the area of the end wall 6 of the housing Spring 52 is present.
  • the movement play of the control piston 50 is down limited by a stop 54 on the inner wall of the tube 34.
  • the piston 50 is at rest by the spring 52 against this stop 54 pressed and closes the outer surface of the Breakthroughs 46 in the tube 34.
  • the control piston 50 is stepped axial through bore 56 provided, in the training known per se a ball check valve 58 is arranged. This ball check valve 58 is aligned in such a way that it comes from the connection with incoming compressed air 44 forth opens, with a positive pressure difference from the Pressurizing chamber 40, however, closes.
  • the spring chamber 28 is essentially hermetically sealed, but it is an air outlet opening 60 is provided in the housing jacket 4, which the degradation an overpressure in the spring chamber 28 allowed when the piston against the Coil spring 26 is moved back. As from the enlargement of Fig. 1a can be seen, is also in the air outlet opening 60 Check valve 62 is arranged, which allows the outflow of pressurized air allows outside air to enter the spring chamber prevented.
  • the compressed air supplied passes through the valve device 48, which in the In the idle state, the openings 46 in the tube 34 are closed when the opening is open Ball check valve 58 in the control piston 50 directly into the Pressurization chamber 40 and presses the percussion piston 18 against the Return force of the coil spring 26 upwards.
  • the percussion piston 18 is in brought an equilibrium position by the pressure of the supply compressed air and depends on the spring.
  • Fig. 3 shows a modified embodiment of a pneumatic knocker
  • a pipe or rather a pipe section 64 provided, which is fixed to the percussion piston 18, with its upper Front side (based on the graphic representation) is connected.
  • This Pipe section 64 is only a piece in the for the purpose of its attachment Percussion piston 18 inserted.
  • the channel formed by the pipe settles within the piston as an axial channel through a bore 66th is formed, the diameter of which is approximately that Corresponds to the diameter of the tube 64.
  • a transition piece 68 attached to the upper end of the tube 64 a metal bellows 70, the other end on the inside of the upper end wall 6 of the housing is appropriate.
  • the metal bellows 70 is for the prints used designed to be pressure-resistant.
  • the spring constant of the metal bellows can be so be chosen so that they store the energy of the compression spring 26th can support.
  • the valve device 48 in the embodiment of FIG. 3 corresponds to that in the embodiment according to FIG. 1 educated. Since in the embodiment according to FIG. 3 the pipe section 64 is firmly connected to the percussion piston 18, this embodiment has the Advantage that the openings designated 46 there in the wall of the Pipe section immediately above the top of the percussion piston 18th can be arranged so that even when the percussion piston 18 is moving the shortest flow path between the pressurizing space 40 and the spring chamber 28 can be maintained.
  • the pipe section 64 is instead of the Metal bellows of the embodiment of FIG. 3 in turn with a connected further pipeline 74 which is slidable through an opening in the end face 6 of the housing is passed through.
  • This pipe 74 can be rigid, but also have a certain flexibility.
  • the embodiment is the movement of the percussion piston 18 over the Pipeline 74 in an area outside the knocker housing transfer. If this pipeline outside the housing is still a knee has for fastening a compressed air connection, as shown in FIG. 4 is shown, there is a possibility that a person at the Impact execution between pipe 74 and the end wall 6 of the housing can jam.
  • the embodiment according to FIG. 4 is therefore not considered to be particularly preferred.
  • FIG. 2 shows the cut area of the percussion piston 18, that the piston in its lower portion in the area of the sealing rings 20 and 36 is divided in a horizontal plane 76.
  • the piston parts are screwed together by screws 78.
  • PTFE sealing rings the preferably used with oil-free compressed air and / or higher temperatures are very difficult, especially in internal grooves in bores bring in, which is why the split version of the piston here Assembly aid offers.
  • the grooves for the inner and outer seal are included expediently placed so that they are in the same area Division level fall. If the compressed air is oiled, the one-piece piston can be Fig. 1 can be used.
  • Fig. 5 shows a modified cylinder head, in one Elastomer plate 78 is inserted.
  • the check valve for venting the Spring chamber is here as a check valve 80 in the elastomer plate housed.
  • the ventilation itself does not take place directly at the point of the Check valves through the housing end wall 6 instead takes place over a Annular groove 82 to a vent 84 elsewhere in the Housing end wall 6.
  • the check valve 80 designed as a ball valve leaves so easy to train and assemble.
  • the valve ball can be loose in one corresponding recess in the elastomer plate 78 are inserted.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Check Valves (AREA)

Claims (14)

  1. Dispositif batteur pneumatique comportant:
    un logement (2) avec une chemise de logement (4) et au moins une paroi d'about (6);
    un piston de frappe (18) agencé de manière à pouvoir glisser dans le logement en direction axiale de la chemise de logement (4);
    un espace de ressort (28), essentiellement limité par une première face d'about du piston, la chemise du logement et la au moins une paroi d'about de logement (6);
    un dispositif de ressort à pression (26) agencé
    dans l'espace de ressort (28), appuyé d'une part sur cette première face d'about de piston et de l'autre sur le logement;
    un espace d'admission de pression (40), essentiellement limité par la deuxième face d'about du piston (38), la chemise de logement (4) et une contre-surface fixée au logement;
    un raccordement d'amenée pour l'agent de pressurisation, traversant le logement;
    un canal de raccordement (42) pour l'agent de pressurisation du raccord d'amenée à l'espace d'admission de pression (40), et
    un dispositif de soupape (48) automatique adjoint au canal de raccordement (42), avec un embranchement dans l'espace de ressort (28), pour la fermeture du canal de raccordement (46) qui provient du raccordement d'amenée et pour l'établissement d'un raccordement de transfert entre l'espace d'admission de pression (40) et l'espace de ressort (28),
    caractérisé en ce que le canal de raccordement (42) pour l'agent de pressurisation présente une section principale (66) essentiellement en ligne droite (tubes 34, 64), qui, à partir de l'espace d'admission de pression (40), est constitué d'un canal axial (66) au travers du piston de frappe (18) et d'une conduite (tubes 34, 64) se raccordant à celui-ci dans ou au travers de l'espace de ressort (28), et en ce que l'embranchement est formé d'ouvertures de passage (46) dans la paroi de cette conduite.
  2. Dispositif batteur pneumatique suivant la revendication 1, caractérisé en ce que la conduite est constituée d'un tube (34), qui d'une part fixé au logement est rélié à la paroi d'about de logement du côté de l'espace de ressort (6) et d'autre part se poursuit dans un forage axial (30) du piston de frappe (18) et dans lequel il glisse de façon étanche (36).
  3. Dispositif batteur pneumatique suivant la revendication 1, caractérisé en ce que la conduite présente un tube (64), lequel est solidement fixé au piston de frappe (18).
  4. Dispositif batteur pneumatique suivant la revendication 3, caractérisé en ce que le tube (64) est relié à son autre extrémité à un soufflet (70) résistant à la pression, dont l'autre extrémité est reliée à la paroi d'about de logement côté espace de ressort (6).
  5. Dispositif batteur pneumatique suivant la revendication 3, caractérisé en ce que le tube (64, 74) glisse de façon étanche au travers de la paroi d'about de logement (6) côté espace de ressort et est muni à son extrémité se trouvant à l'extérieur du logement d'un raccord d'amenée pour l'agent de pressurisation.
  6. Dispositif batteur pneumatique suivant au moins l'une des revendications 2 à 5, caractérisé en ce que les ouvertures de passage (46) formant l'embranchement sont développées dans la paroi du tube (34, 64) de la conduite et débouchent directement dans l'espace de ressort (28).
  7. Dispositif batteur pneumatique suivant la revendication 6, caractérisé en ce que le dispositif de soupape automatique (48) est agencé à l'intérieur du tube (34, 64) de la conduite.
  8. Dispositif batteur pneumatique suivant les revendications 6 et 7, caractérisé en ce que le dispositif de soupape présente une pièce pilote (50), laquelle, à l'intérieur du tube (34,64) de la conduite, est conduite coulissant axialement de manière limitée pour rendre étanche, et développée pour libérer ou fermer les ouvertures de passage (46) de l'embranchement.
  9. Dispositif batteur pneumatique suivant la revendication 8, caractérisé en ce que la pièce pilote fait partie d'un agencement de piston distributeur (50), qui se trouve sous la prétension d'un élément élastique (52), au moyen duquel la pièce pilote (50) est maintenue au repos contre une butée (54) dans une position qui ferme l'embranchement (46), mobile cependant lors d'une pression différentielle positive qui provient de l'espace d'admission de pression (40) contre la force de rappel de l'élément élastique (52) dans la direction du raccord d'amenée (44, 72) pour l'agent de pressurisation dans une position de libération pour l'embranchement (46).
  10. Dispositif batteur pneumatique suivant les revendications 8 ou 9, caractérisé en ce que l'agencement de piston distributeur (50) contient des canaux d'écoulement axiaux (56) avec un clapet antiretour (58), lequel passe en position fermée en cas de pression différentielle positive qui provient du côté de l'espace d'admission de pression (40).
  11. Dispositif batteur pneumatique suivant au moins l'une des revendications 1 à 10, dans lequel l'espace de ressort (28) est fermé de façon étanche à la pression jusque sur un dispositif d'échappement (60, 62), qui est relié au milieu ambiant.
  12. Dispositif batteur pneumatique suivant la revendication 11, caractérisé en ce que le dispositif d'échappement est développé sous la forme d'un clapet antiretour (62).
  13. Dispositif batteur pneumatique suivant au moins l'une des revendications 1 à 12, caractérisé en ce que la contre-surface fixée au logement de l'espace d'admission de pression (40) est formée par un objet externe, avec lequel le logement (2) du dispositif batteur pneumatique est relié de façon étanche.
  14. Dispositif batteur pneumatique suivant au moins l'une des revendications 1 à 13, caractérisé en ce que le piston de frappe (18) est développé de manière divisée dans la zone de rainures annulaires d'étanchéité extérieures et/ou, le cas échéant, intérieures (20, 36), et en ce les pièces peuvent être raccordées entre elles, par exemple par boulonnage (78).
EP97121638A 1996-12-18 1997-12-09 Dispositif batteur pneumatique Expired - Lifetime EP0849005B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19652707A DE19652707C2 (de) 1996-12-18 1996-12-18 Pneumatischer Klopfer
DE19652707 1996-12-18

Publications (2)

Publication Number Publication Date
EP0849005A1 EP0849005A1 (fr) 1998-06-24
EP0849005B1 true EP0849005B1 (fr) 1999-10-06

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Application Number Title Priority Date Filing Date
EP97121638A Expired - Lifetime EP0849005B1 (fr) 1996-12-18 1997-12-09 Dispositif batteur pneumatique

Country Status (5)

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US (1) US5893317A (fr)
EP (1) EP0849005B1 (fr)
JP (1) JP3331315B2 (fr)
DE (2) DE19652707C2 (fr)
ES (1) ES2138429T3 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4644507B2 (ja) * 2005-03-29 2011-03-02 カネキタ株式会社 エアノッカ
US7717856B2 (en) * 2005-05-02 2010-05-18 Qdevice Medical Inc. Non-toxic liquid column sphygmomanometer
EP2336276B1 (fr) * 2009-12-12 2015-03-11 KOPF SynGas GmbH & Co. KG Refroidisseur de gaz doté d'un dispositif de martelage
DE102012005804A1 (de) 2012-03-21 2013-09-26 Thyssenkrupp Uhde Gmbh Klopfer für staubbehaftete Rohrwände
JP5849271B2 (ja) 2014-05-02 2016-01-27 アピュアン株式会社 単発式のエアーハンマー工具、及び該単発式のエアーハンマー工具の打撃力調整方法
CN104670748A (zh) * 2015-02-28 2015-06-03 深圳市中意能源设备有限公司 喷吹器和喷吹清堵装置
KR101808216B1 (ko) 2015-04-27 2017-12-12 아퓨안 가부시키가이샤 단발식의 에어 해머 공구, 및 상기 단발식의 에어 해머 공구의 타격력 조정 방법
CN105032751B (zh) * 2015-07-13 2017-12-12 王洪波 一种气动振动装置
CN107366661B (zh) * 2017-08-17 2019-01-04 太原理工大学 一种采用弹簧系统的脉动气流发生装置

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH518158A (de) * 1971-04-06 1972-01-31 Schlatter Ag Pneumatisches Halteaggregat
US3917233A (en) * 1973-08-24 1975-11-04 Sherwin Williams Co Vibrator
DE2549551C3 (de) * 1975-11-05 1979-05-03 Fa. Jean Netter, 6200 Wiesbaden Pneumatisch arbeitender Klopfer
DE3866865D1 (de) * 1987-09-09 1992-01-23 Max Fehr Pneumatischer linearvibrator.
DE3819111A1 (de) * 1988-06-04 1989-12-14 Netter Gmbh Pneumatischer klopfer
DE3819112A1 (de) * 1988-06-04 1989-12-14 Netter Gmbh Klopfer mit selbststeuerung
SK279150B6 (sk) * 1990-11-09 1998-07-08 Permon Pneumatické ponorné vŕtacie náradie

Also Published As

Publication number Publication date
DE19652707C2 (de) 2000-07-20
DE59700523D1 (de) 1999-11-11
JPH10230474A (ja) 1998-09-02
US5893317A (en) 1999-04-13
ES2138429T3 (es) 2000-01-01
DE19652707A1 (de) 1998-06-25
EP0849005A1 (fr) 1998-06-24
JP3331315B2 (ja) 2002-10-07

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