EP0742373B1 - Appareil moteur pneumatique - Google Patents

Appareil moteur pneumatique Download PDF

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Publication number
EP0742373B1
EP0742373B1 EP96107419A EP96107419A EP0742373B1 EP 0742373 B1 EP0742373 B1 EP 0742373B1 EP 96107419 A EP96107419 A EP 96107419A EP 96107419 A EP96107419 A EP 96107419A EP 0742373 B1 EP0742373 B1 EP 0742373B1
Authority
EP
European Patent Office
Prior art keywords
piston
pneumatic drive
drive device
chamber
switch over
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
EP96107419A
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German (de)
English (en)
Other versions
EP0742373A1 (fr
Inventor
Zsolt Szabo
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.)
Individual
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0742373A1 publication Critical patent/EP0742373A1/fr
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Anticipated expiration legal-status Critical
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
    • F15B13/0401—Valve members; Fluid interconnections therefor
    • F15B13/0402—Valve members; Fluid interconnections therefor for linearly sliding valves, e.g. spool valves

Definitions

  • the present invention relates to a pneumatic drive device.
  • the object of the present invention is to provide a pneumatic drive device, which is mechanically simple and even with less Press works satisfactorily.
  • the pistons alternating outward blows or execute pulses at a certain frequency.
  • the strength of the punches can be determined by the dimensioning of the pressure supplied and the dimensions of the components.
  • the change in the direction of movement pistons coupled to one another are produced by a piston which is positively controlled by the piston element Switching element that mutually assigned the piston Chamber opens in terms of printing technology, with the returned pistons the switching element switch.
  • the simple mechanical design creates one pneumatic drive device of simple construction, the Parts are pneumatically guided so that no lubrication is required.
  • the pneumatic drive device can air-bearing twin pistons use that are positively controlled by the switching element.
  • the through the Pressure applied energy is effectively and continuously implemented without loss. Due to the air bearing, low friction losses occur, so that a much higher efficiency than with conventional drive devices can be achieved.
  • the pneumatic drive device according to the invention can be used universally for all pulse-controlled or impact-controlled Drive problems. It can be used particularly advantageously for implantation and explanting prostheses and intramedullary nails or for medical purposes Rasps and saws, in particular for prosthetic purposes.
  • the switching element has two radial sealing lips, which serve to mutually close the inlet openings.
  • the radial Sealing lips serve on the one hand to form the front and rear chambers exist between the respective radial sealing lip and the piston inner surface.
  • the radial sealing lips serve as a second function for closing of the inlet openings. This double function is space-saving and reduces the total required components.
  • the distance between the two radial sealing lips is smaller is the distance between the inlet openings. That way is one Favorable mutual or alternative closure of the inlet openings possible.
  • the connecting pipe has at least one front exhaust opening for ventilation the front chamber and at least one rear exhaust opening for Vent the rear chamber. This facilitates the return movement of the corresponding piston, whereby the contained in the corresponding chamber Volume is discharged.
  • the connecting tube is preferably passed through the switching element, so that both elements guide each other axially. This is the number of components and the space requirement is also reduced.
  • the pistons have end faces Through openings for residual ventilation. Alternatively or additionally you can through openings formed in the housing can also be provided in order to To support residual ventilation. It is also possible to switch between pistons and Provide an adequately dimensioned annular gap for the cylinder, which provides the residual ventilation the corresponding cylinder chamber guaranteed. To do that in the residual volume contained in the respective chamber must be appropriately discharged Through openings formed on the end face in the piston are provided. Complement these the effect of the exhaust openings in the connecting pipe.
  • the connecting pipe is preferably passed through the pistons and at the end open.
  • Figure 1 shows a perspective view of a half-broken embodiment a pneumatic drive device according to the invention.
  • Figure 2 shows a cross section through the embodiment of Figure 1.
  • the pneumatic drive device shown in the figures has a housing 2, which has two sections of different inner diameters. Of the The outer diameter of the housing is the same over the entire length.
  • the different Dimensioning of the section cross sections or piston cross sections allows you to set the pulse amplitude in the respective direction so that different pulse amplitudes or force amplitudes can be set.
  • the two sections can have the same diameter.
  • a switching element 10 is inserted approximately in the center of the housing 2, which is used for mutual pressurization of the two pistons 4 and 6 is used.
  • the Switching element 10 has two axially spaced apart Sealing lips 12, 12 ', both of which are in the housing section of smaller diameter are located. Between the front sealing lip 12 'and the opposite arranged front piston 4 is a front chamber 14, which as Pressurizing chamber for the piston 4 is used. Between the rear Sealing lip 12 and the rear piston 6 arranged opposite is located a rear chamber 16 which acts as a pressurizing chamber for the piston serves.
  • the housing 2 namely the section of the smaller diameter, there are two inlet openings arranged at an axial distance from one another 18, 20, which serve to pressurize the two chambers 14 and 16.
  • the two inlet openings 18, 20 open in the region of the axially displaceable stored switching element 10.
  • the switching element 10 is designed and installed so that it is between a first left position shown in Figure 2 and a second (not shown) position is displaceable.
  • first position shown in Figure 2 is the inlet opening 18 to the front chamber 14 through the sealing lip 12 ' blocked so that the chamber 14 can not be pressurized.
  • the inlet opening 20 is in this first position the inlet opening 20 with the rear chamber 16 in connection.
  • the two inlet openings 18, 20 are with a pressure source connected so that the pressure medium flowing into the chamber 16 Piston 6 moves outward while the volume of chamber 16 increases becomes. Since the two pistons 4 and 6 are coupled, the piston 4 carries one movement in the same direction.
  • the axially extreme end of the Switching element 10 is formed by a sleeve 26 against which the Piston 4 bumps during its return movement.
  • the piston 4 leads through contact the cuff 26 the switching element from a first (left in Figure 2 position) to the second position (not shown) in which the inlet opening 18 to the front chamber 14 is open while the inlet opening 20th to the rear chamber 16 is now closed.
  • the at the inlet opening 18th connected pressure line leads pressure medium into the expanding one Front chamber 14, whereby the piston 4 is driven outwards.
  • the piston 6 performs an inward movement, the last Third of the movement to abut against one end of the changeover element 10 formed cuff 26 'leads.
  • the recoil piston 6 pushes through System on the cuff 26 'the switching element 10 from its second Position back to its first position (shown in Figure 2).
  • the connecting pipe 8 there are two discharge openings for opening in the chamber 14 22, 22 'formed for the removal of that received in the chamber 14 serve pneumatic volume.
  • the connecting pipe 8 passed through the piston 4 and opens at the outer Face.
  • two are opposite to the opening in the rear chamber 16 rear discharge openings 24, 24 'formed for fluid emptying serve the rear chamber 16 in their contraction.
  • the connecting pipe 8 is also passed through the piston 6 and opens at the outer Face.
  • For residual ventilation are formed in the front of the two pistons 4, 6 Through openings or a gap formed between the cylinder and piston provided that are used for residual ventilation.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Actuator (AREA)

Claims (8)

  1. Dispositif moteur pneumatique comprenant
    un boítier cylindrique (2) dans lequel un élément de piston (4, 6, 8) est guidé coulissant, l'élément de piston présentant à ses extrémités un piston avant (4) et un piston arrière (6) qui sont reliés entre eux par un conduit de liaison (8),
    un élément d'inversion (10) monté entre les pistons (4, 6), qui définit avec le piston avant (4) une chambre variable avant (14) et avec le piston arrière (6) une chambre variable arrière (16), et
    deux ouvertures d'admission (18, 20) alimentées en pression formées dans le boítier (2), qui peuvent être mises en communication avec la chambre avant (14) respectivement arrière, l'élément d'inversion (10) libérant dans une première position l'ouverture d'admission (20) de la chambre arrière de telle façon que le piston arrière (6) se déplace axialement vers l'extérieur par rapport à l'élément de d'inversion (10) et que le piston avant (4) se déplace axialement vers l'intérieur, et libérant dans une deuxième position l'ouverture d'admission (18) de la chambre avant (14) de telle façon que le piston avant (4) se déplace axialement vers l'extérieur par rapport à l'élément d'inversion (10) et que le piston arrière (6) se déplace axialement vers l'intérieur, le piston (4, 6) se déplaçant respectivement vers l'intérieur manoeuvrant l'élément d'inversion (10) entre les deux positions.
  2. Dispositif moteur pneumatique selon la revendication 1, caractérisé en ce que l'élément d'inversion (10) présente deux lèvres d'étanchéité radiales (12, 12') qui ouvrent respectivement ferment alternativement les ouvertures d'admission.
  3. Dispositif moteur pneumatique selon la revendication 2, caractérisé en ce que l'écartement des lèvres d'étanchéité (12, 12') est plus faible que l'écartement des ouvertures d'admission (18, 20).
  4. Dispositif moteur pneumatique selon l'une quelconque des revendications précédentes, caractérisé en ce que le conduit de liaison (8) présente au moins une ouverture d'évacuation avant (22, 22') pour évacuer l'air de la chambre avant (14) et au moins une ouverture d'évacuation arrière (24, 24') pour évacuer l'air de la chambre arrière (16).
  5. Dispositif moteur pneumatique selon l'une quelconque des revendications précédentes, caractérisé en ce que le conduit de liaison (8) est guidé à travers l'élément de communication (10).
  6. Dispositif moteur pneumatique selon l'une quelconque des revendications précédentes, caractérisé en ce que les pistons présentent sur leurs faces frontales des ouvertures de passage pour évacuer l'air résiduel.
  7. Dispositif moteur pneumatique selon l'une quelconque des revendications précédentes, caractérisé en ce que le conduit de liaison (8) est guidé axialement à travers les pistons (4, 6) et est ouvert à ses extrémités.
  8. Dispositif moteur pneumatique selon l'une quelconque des revendications précédentes, caractérisé en ce que le boítier (2) présente des ouvertures de passage pour évacuer l'air résiduel.
EP96107419A 1995-05-09 1996-05-09 Appareil moteur pneumatique Expired - Lifetime EP0742373B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19516977 1995-05-09
DE19516977A DE19516977C2 (de) 1995-05-09 1995-05-09 Pneumatische Antriebsvorrichtung

Publications (2)

Publication Number Publication Date
EP0742373A1 EP0742373A1 (fr) 1996-11-13
EP0742373B1 true EP0742373B1 (fr) 1999-08-18

Family

ID=7761455

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96107419A Expired - Lifetime EP0742373B1 (fr) 1995-05-09 1996-05-09 Appareil moteur pneumatique

Country Status (4)

Country Link
US (1) US5676033A (fr)
EP (1) EP0742373B1 (fr)
AT (1) ATE183573T1 (fr)
DE (1) DE19516977C2 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2769919C (fr) * 2009-08-04 2017-10-24 Depiak Industrial Technology Corporation Moteur lineaire alternatif entraine par fluide
JP6665985B2 (ja) * 2017-04-07 2020-03-13 Smc株式会社 増圧装置

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2818022A (en) * 1956-03-14 1957-12-31 Phillips Petroleum Co Bottom hole hydraulic pump
DE1703726C3 (de) * 1968-07-03 1974-03-07 Rilco Maschinenfabrik Gmbh & Co Kg, 7407 Dusslingen Druckflüssigkeitsbetriebene Vorrichtung zur Erzeugung einer hin- und hergehenden Bewegung
US4033134A (en) * 1976-06-11 1977-07-05 Bentley Arthur P Heat engine
ZA764220B (en) * 1976-07-15 1978-02-22 Compair Sa Ltd Improvements in or relating to hydraulically powered percussive apparatus
US4174928A (en) * 1978-03-13 1979-11-20 Austin Richard D Double acting concrete pump
US4759260A (en) * 1978-05-17 1988-07-26 Lew Yon S Super reliable air-spring return air cylinder
US4364303A (en) * 1980-09-08 1982-12-21 Sumida Kunio A Air operated reciprocating tool
FR2547871B1 (fr) * 1983-06-24 1987-10-16 Mecagrav Sa Verin multiplicateur de pression
HU195290B (en) * 1985-03-15 1988-04-28 Finoszerelvenygyar Control valve for double-acting pneumatic working cylinders
US5470209A (en) * 1993-10-13 1995-11-28 Shurflo Pump Manufacturing Co. Offset reciprocable device

Also Published As

Publication number Publication date
DE19516977C2 (de) 1997-03-27
US5676033A (en) 1997-10-14
EP0742373A1 (fr) 1996-11-13
ATE183573T1 (de) 1999-09-15
DE19516977A1 (de) 1996-11-21

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