EP0105246B1 - Dispositif d'entraînement et de guidage avec un vérin et un élément de transmission - Google Patents

Dispositif d'entraînement et de guidage avec un vérin et un élément de transmission Download PDF

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Publication number
EP0105246B1
EP0105246B1 EP83109150A EP83109150A EP0105246B1 EP 0105246 B1 EP0105246 B1 EP 0105246B1 EP 83109150 A EP83109150 A EP 83109150A EP 83109150 A EP83109150 A EP 83109150A EP 0105246 B1 EP0105246 B1 EP 0105246B1
Authority
EP
European Patent Office
Prior art keywords
actuator
piston rod
lifting cylinder
translating element
guide track
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
Application number
EP83109150A
Other languages
German (de)
English (en)
Other versions
EP0105246A1 (fr
Inventor
Arthur Fakrikian
Jacky Capra
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.)
MOULGRAVE S.A.
Original Assignee
Moulgrave SA
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 Moulgrave SA filed Critical Moulgrave SA
Priority to AT83109150T priority Critical patent/ATE26747T1/de
Publication of EP0105246A1 publication Critical patent/EP0105246A1/fr
Application granted granted Critical
Publication of EP0105246B1 publication Critical patent/EP0105246B1/fr
Expired legal-status Critical Current

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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
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/02—Mechanical layout characterised by the means for converting the movement of the fluid-actuated element into movement of the finally-operated member
    • F15B15/06—Mechanical layout characterised by the means for converting the movement of the fluid-actuated element into movement of the finally-operated member for mechanically converting rectilinear movement into non- rectilinear movement
    • F15B15/065—Mechanical layout characterised by the means for converting the movement of the fluid-actuated element into movement of the finally-operated member for mechanically converting rectilinear movement into non- rectilinear movement the motor being of the rack-and-pinion type
    • 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
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/02—Mechanical layout characterised by the means for converting the movement of the fluid-actuated element into movement of the finally-operated member

Definitions

  • the invention relates to a pressure medium operated actuator according to the preamble of claim 1.
  • Actuators are known in which the transmission element, for example a toothed rack, is coupled in the extension of the lifting rod of the cylinder. Such an actuator is shown in FIG. 7, for example.
  • Such a device has numerous disadvantages and in particular requires a lot of space.
  • the fact that two elements, the lifting cylinder and the transmission element, are arranged one behind the other, causes a kinking of the transmission element when a certain value for the stroke path of the cylinder is exceeded. It is therefore necessary to provide guide means for the transmission element, and this guidance must necessarily take place where the guide element is moving.
  • a pressure medium operated actuator with a small footprint has a lifting cylinder, the piston of which is displaceable within a body, a piston rod and at least one transmission element which can be coupled to a mechanical unit to be driven and which is connected to the free end of the piston rod via a bracket, arranged parallel to the lifting cylinder and in an outside of the body provided guideway is displaceable.
  • the guidance itself is effected by rolling, only a single movable transmission element in the form of a plate is provided.
  • the invention is based on the object of designing a pressure medium-operated actuator of the above type in such a way that several transmission elements which can be coupled to different mechanical units or supports are obtained.
  • the outer part of the body has the cross-section of a polygon over its entire length and in that each outer surface of the body is provided with a longitudinal groove, one longitudinal groove serving as a guideway for a transmission element and the free longitudinal grooves for fastening the Actuator are provided on the mechanical unit or other support.
  • This pressure medium-operated actuator can serve both for positioning the transmission element and for fastening it to an associated mechanical unit, or the transmission element can be arranged on any other mechanical support.
  • each longitudinal groove in the form of a slideway of the body of the lifting cylinder is partially closed by retaining rails which are fastened along the edges and form two longitudinally extending retaining lips for the transmission element.
  • a transmission member may be coupled to either end of the piston rod.
  • the lift cylinder can also be a type with two pistons, the movements of which are opposite.
  • the transmission element is designed as a toothed rack which is connected to a pinion.
  • the inlet and outlet openings of the pressurized fluid, which supplies the lifting cylinder are arranged on one side of the body, the skilful selection of the longitudinal groove or the longitudinal grooves which are to serve as a guideway for the transmission element, it allows the openings to be oriented in the desired direction.
  • the device according to the invention has a hydraulic cylinder 2 and a transmission element, which in the exemplary embodiment shown consists of a toothed rack 3 which is coupled to the projecting end 5a of the piston rod 5 with the aid of a bracket 4.
  • the body 6 of the hydraulic cylinder 2 has a cross section with an essentially square outer profile and has a longitudinal groove 7 on each of the four side surfaces, which is suitable for producing a guide track for guiding the rack 3.
  • a single rack 3 is provided, and the figure shows more precisely that the longitudinal groove 7, which is shown on the left in the figure and is intended to serve as a guideway for the rack 3 , partially closed by two holding rails 8 which are fastened along the edges of the longitudinal groove 7 with the aid of screws 9 in such a way that they form holding lips along the longitudinal groove 7 which act on them Limit a slideway with a T-shaped cross section, which is suitable for holding the rack 3 with a complementary cross section.
  • the inlet openings and outlet openings 11 for the pressurized medium for supplying the hydraulic cylinder 2 are both on the same side of the body 6.
  • This arrangement combined with the presence of the four longitudinal grooves 7 allows the user to to orient the openings 11 as desired since he can select one of the four longitudinal grooves 7 in order to form the guide path for the toothed rack 3, this selection naturally being made depending on the application of the device.
  • the toothed rack 3 and the piston rod 5 of the hydraulic cylinder 2 are not aligned with one another but are arranged parallel to one another and that the guide elements for the toothed rack 3 are provided directly in the body 6 of the hydraulic cylinder 2.
  • the device is very compact compared to other devices of this type and is further characterized by significantly lower manufacturing costs, since the body 6 of the hydraulic cylinder 2 participates to a considerable extent in the guidance of the rack 3.
  • FIG. 3 and 4 differs from the embodiment shown in Figures 1 and 2 in that two racks 3 are coupled to the same end of the piston rod 5 of the hydraulic cylinder 2 by a double bracket 4a, the longitudinal grooves 7, the are selected as guideways, are located on opposite sides of the body 6 of the hydraulic cylinder 2.
  • the hydraulic cylinder 2a has a continuous piston rod 5c and each of the two racks 3, which are guided in guideways in the longitudinal grooves 7 on two opposite sides of the body 6, is through a bracket 4 with the end of the piston rod 5c connected.
  • the hydraulic cylinder 2b has two piston rods 5b with pistons which are independent of one another and which can be moved in opposite directions.
  • Each piston rod 5b is coupled by means of a bracket 4 to one of the two racks 3, the movements of which are in opposite directions.
  • FIGS 7 and 8 clearly show the reduction in space required in the device according to the invention.
  • the toothed rack 3 is arranged in alignment at the end of the piston rod 5 of the hydraulic cylinder 2, the body 6 of which is attached to the mechanical unit 12, for which the device is intended, by means of a bracket 13 and struts 14 are attached which connect the bracket 13 to the mechanical unit 12.
  • the length of the struts 14 is determined by the stroke length of the piston rod 5 of the hydraulic cylinder 2 and, accordingly, the rack 3, the cross section of the struts 14 having to be larger as the distance increases.
  • the mechanical unit 12 is an industrial form in which pinions 12a have to be set in rotation by a linear movement of the piston rod 5 of the hydraulic cylinder 2.
  • FIG. 1 shows the adaptation of the device according to the invention to the same mechanical unit 12.
  • the device according to the invention used in this example is identical to the device shown in FIGS. 1 and 2.
  • FIGS. 7 and 8 clearly shows the reduction in the space requirement which results when using the device according to the invention, and the reduction in the production price as a result of the elimination of essential mechanical elements.
  • the device according to the invention can be equipped with detector devices which determine the position of the piston rod of the hydraulic cylinder or its end position. Furthermore, devices for speed control and any other auxiliary devices of this type can also be provided.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Actuator (AREA)
  • Vehicle Body Suspensions (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
  • Burglar Alarm Systems (AREA)

Claims (5)

1. Vérin hydraulique ou pneumatique comprenant un cylindre de levage (2) dont le piston se déplace latéralement à l'intérieur d'un corps (6), une tige de piston (5) et au moins un élément de transmission (3) pouvant être accouplé à une unité mécanique (12), cet élément de transmission étant lié à l'extrémité libre (5a) de la tige du piston (5) par l'intermédiaire d'un étrier (4), disposé parallèlement au piston de levage, et pouvant être translaté dans une coulisse (7) prévue sur la surface extérieure du corps (6), caractérisé en ce que la partie extérieure du corps (6) présente sur toute sa longueuer la coupe d'un polygone et que chaque surface extérieure du corps (6) est dotée d'une rainure longitudinale (7), chacune de ces rainures longitudinales (7) pouvant respectivement servir de coulisse pour un élément de transmission (3), les rainures longitudinales libres étant prévues pour fixer le vérin sur l'unité mécanique (12) ou sur tout autre support.
2. Vérin selon la revendication 1, caractérisé en ce que au moins une rainure longitudinale (7) pratiquée dans le corps (6) du cylindre de levage (2) et formant coulisse est en partie fermée par des rails de soutien (8) fixés le long des bords de la rainure longitudinale pour former des lèvres de soutien longitudinales pour l'élément de transmission (3).
3. Vérin selon l'une des revendications 1 ou 2, caractérisé en ce que dans chacun des cylindres de levage (2a) avec une tige de piston continue (5c), un élément de transmission (3) est accouplé à chaque extrémité de la tige de piston (5c).
4. Vérin selon l'une des revendications 1 ou 2, caractérisé en ce que le cylindre de levage (2b) est doté de deux pistons se déplaçant en sens opposés comprenant chacun une tige de piston (5c) unilatérale qui sortent du cylindre de levage (2a) à ses extrémités et qui, à leurs extrémités sortantes, sont accouplées à un élément de transmission (3).
5. Vérin selon l'une des revendications précédentes, caractérisé en ce que en vue de la transformation d'un mouvement de translation latérale en mouvement rotarif, l'élément de transmission (3) est une crémaillère s'engrenant sur un pignon (12a) rotatif sur l'unité mécanique à entraîner.
EP83109150A 1982-09-30 1983-09-16 Dispositif d'entraînement et de guidage avec un vérin et un élément de transmission Expired EP0105246B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83109150T ATE26747T1 (de) 1982-09-30 1983-09-16 Antriebs- und fuehrungsvorrichtung mit einem hubzylinder und einem uebertragungselement.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8216707 1982-09-30
FR8216707A FR2533978B1 (fr) 1982-09-30 1982-09-30 Dispositif de transmission et de guidage combinant un verin et un element de transmission

Publications (2)

Publication Number Publication Date
EP0105246A1 EP0105246A1 (fr) 1984-04-11
EP0105246B1 true EP0105246B1 (fr) 1987-04-22

Family

ID=9278001

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83109150A Expired EP0105246B1 (fr) 1982-09-30 1983-09-16 Dispositif d'entraînement et de guidage avec un vérin et un élément de transmission

Country Status (4)

Country Link
EP (1) EP0105246B1 (fr)
AT (1) ATE26747T1 (fr)
DE (1) DE3371109D1 (fr)
FR (1) FR2533978B1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3410973C2 (de) * 1984-03-24 1986-06-05 Festo KG, 7300 Esslingen Druckmittelbetätigte schlittenartige Vorschubeinrichtung
DE3424515A1 (de) * 1984-07-04 1986-01-09 Gottfried 5905 Freudenberg Bitterlich Pneumatischer antrieb
DE3535704A1 (de) * 1985-10-05 1987-04-09 Festo Kg Kolben-zylinder-anordnung
DE3709154A1 (de) 1987-03-20 1988-09-29 Fraunhofer Ges Forschung Laengszylindereinheit

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB790771A (en) * 1954-10-18 1958-02-19 E P Barrus Concessionaires Ltd Improvements in and relating to hydraulic rams or jacks
FR1351795A (fr) * 1963-03-19 1964-02-07 Tschudin & Heid Ag Pupitre de commande à air comprimé
GB1394281A (en) * 1972-05-26 1975-05-14 Clarke Chapman Ltd Tool positioning and guiding equipment with hydraulic piston- and-cylinder device
US3772966A (en) * 1972-06-28 1973-11-20 C Mills Fluid torque operator

Also Published As

Publication number Publication date
FR2533978A1 (fr) 1984-04-06
ATE26747T1 (de) 1987-05-15
EP0105246A1 (fr) 1984-04-11
FR2533978B1 (fr) 1987-01-30
DE3371109D1 (en) 1987-05-27

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