EP0003596B1 - Support en forme de disque pour cames, ainsi que cames pour un tel support et utilisation du support - Google Patents

Support en forme de disque pour cames, ainsi que cames pour un tel support et utilisation du support Download PDF

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Publication number
EP0003596B1
EP0003596B1 EP19790100354 EP79100354A EP0003596B1 EP 0003596 B1 EP0003596 B1 EP 0003596B1 EP 19790100354 EP19790100354 EP 19790100354 EP 79100354 A EP79100354 A EP 79100354A EP 0003596 B1 EP0003596 B1 EP 0003596B1
Authority
EP
European Patent Office
Prior art keywords
cam
disc
support
cam elements
cam element
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
EP19790100354
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German (de)
English (en)
Other versions
EP0003596A1 (fr
Inventor
Günter Stracke
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.)
Westdeutsche Elektrogeraetebau GmbH
Original Assignee
Westdeutsche Elektrogeraetebau GmbH
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Filing date
Publication date
Application filed by Westdeutsche Elektrogeraetebau GmbH filed Critical Westdeutsche Elektrogeraetebau GmbH
Publication of EP0003596A1 publication Critical patent/EP0003596A1/fr
Application granted granted Critical
Publication of EP0003596B1 publication Critical patent/EP0003596B1/fr
Expired legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H43/00—Time or time-programme switches providing a choice of time-intervals for executing one or more switching actions and automatically terminating their operations after the programme is completed
    • H01H43/02—Details
    • H01H43/04—Means for time setting
    • H01H43/06—Means for time setting comprising separately adjustable parts for each programme step, e.g. with tappets
    • H01H43/065—Means for time setting comprising separately adjustable parts for each programme step, e.g. with tappets using cams or discs supporting a plurality of individually programmable elements (Schaltreiter)

Definitions

  • the invention relates to a disk-shaped support for cam elements for loading a movable element according to the first part of claim 1 and to cam elements therefor and to the use of the support.
  • Such devices which belong to the genus of adjustable cams, have long been used in many variants and for many purposes, such as. for mechanical control and electrical switching processes depending on a linear stroke size or an angular path or also indirectly from the time.
  • a known cam disk for the time-dependent, periodically programmed triggering of electrical switching operations (DE - A - 1615 034), switching elements are displaceably guided in radial openings or grooves between a base plate and a cover plate such that they are in the stop positions are locked in place by means of bead edges and corresponding grooves.
  • switching elements Since the switching elements must not be adjusted by the load on the switching lever acted upon by them, the force required to move the switching elements from their latched position to another must be relatively large, i.e. the switching elements have to be quite stiff. As a way out to avoid this disadvantage, it has already been proposed or implemented in practice, switching elements by adjustment in two, for example. to lock directions offset at right angles; however, as practical experience teaches, nothing is gained because only the stiffness is exchanged for another disadvantage, namely a much more complicated setting.
  • FR-A-1 522 076 describes a disk-shaped support for cam elements for acting on a lever, the cam elements being formed in recesses at least approximately in the form of a rod with a rectangular cross section and with a shoulder and being guided in the recesses in an adjustable manner.
  • the carrier contains a hub and a disk mounted thereon perpendicular to its axis, the recesses being arranged close to the circumference thereof and their number being equal to the number of division stages of the periodic program.
  • the cam elements can be preset with little effort because the adjustment is at right angles to the actuation of the lever, and consequently maintain their set position even under the action of the lever being operated; in addition, they are secured against being lost and falling out during the default setting and changes.
  • this device has the disadvantage that the actual switching or control element is actuated via an intermediate lever with deflection in the circumferential direction and therefore angularly displaced with respect to the respective cam element.
  • the invention is therefore based on the object to avoid the disadvantages described above and to design the adjustable cam disc for an electrical and / or mechanical and / or a pneumatic and / or hydraulic valve so that in particular the cam elements can also be preset with little effort and their set position also under the action of the actuated lever, slide, or the like. maintained, but without this loading is angularly displaced with respect to the cam element.
  • This task naturally also includes the fact that the parts of the adjustable cam disk, despite the good operational reliability of the entire device, can be assembled more cost-effectively and produced in a space-saving manner than the known comparable devices.
  • the cam element is preset by pivoting about an axis between two stops by means of an easily accessible rod part , and especially in that due to a particularly expedient spatial arrangement and formation of cam elements, their storage and the auxiliary element actuated by him or directly the lever, slide or the like. the on the cam element from the operated lever, slide, or the like. applied force acts at least approximately in a connection line between it and the storage location, so that no force component occurs in the direction of the force required to change the presetting.
  • the cam elements in a special design can be stretched elastically on the bearing point, so that assembly is considerably simplified, although the cam elements are reliably secured against getting lost and falling out.
  • the adjustable cam disc of the subgenus with the features described above is in itself independent for the purposes described above - in conjunction with a suitable drive via the shaft stuck in the bore of the hub or via a peripheral drive - both position and time-dependent periodic control of switching processes excellently suitable because it is easy to use and also optimally reliable, even if you need to divide the disc into a relatively large number of angle steps and still set limits in terms of space requirements.
  • the advantages described are also due to the fact that the components are designed in a manner that is expedient in terms of functionality, but still not very expensive in terms of production engineering, and are easy to see, but for these reasons defined in certain stop. Preset or have readjusted.
  • the disc 3 is attached to the hub 1 with the bore 2 - hub axis 2a - for a shaft, not shown, which either is pressed firmly into the bore or may serve as a bearing for the freely rotating hub.
  • the hub 1 contains the reinforcement 4 with a conical longitudinal section in its central longitudinal region, which is indicated by the angle 5 between the lateral surface 6 and the front surface 7 of the rod-shaped part 8 of the cam element 9.
  • the annular bead 11 is attached at the end 10 of the reinforcement 4, where it has the larger diameter.
  • this has a cross section which is more than half, namely only with the exception of the connecting piece 12 necessary for the one-piece thermoplastic molding.
  • the disk 3 has (see also FIG. 2b) the slots or openings 13, 13a, 13b, etc. arranged in a circular division with 2 by 7 steps, the width of which is at least approximately equal to the width 14 of the cam elements 9 (see. also Fig. 3) and whose length 15 limits the path of the rod-shaped parts 8 of the cam elements 9 when preset in the manner of stops.
  • the disk 3 has an axial distance 16 from the annular bead 11 which is at least approximately equal to the thickness 17 of the disk 3.
  • the cam element 9 On the cam element 9 is in the region of its rod-shaped part 8 at the height of the disc 3 or its associated passage. 13 broke the spring nose 18 in one piece. forms, whose free end 19 terminates at least approximately at the same height with the lower edge 20 of the opening, i.e. more precisely on the outer surface 31 of the opening 13, at least by a small part 32 of the thickness 17 of the disc 3 above. that of the depository. 21 facing lower edge 20 is under prestress and is thereby held in place.
  • the mentioned bearing point 21 consists of an edge of the opening that is circular at least 180 ° around the circumference and with which the bearing bush-like extension 22 on the rod-shaped part 8 of the cam element 9 is equipped.
  • the cam element 9 also has an integrally molded cross-piece 23, which in its position shown in Fig. 1 a in the axial height between the bead 11 and the perforated disc of the carrier with its lower surface 24 is mounted so that this in a plane outside , preferably in an air gap distance parallel to the movement space, the lever, slide, or the like. 26 is pronounced under the influence of its restoring force (arrow 25); in Fig. 1 the latter is pressed by this restoring force into a predetermined end position 27 by a stop, not shown.
  • the cross piece 23 is also integrally formed on the side 28 of the rod-shaped part 8 of the cam element 9 facing away from the hub 1.
  • the cross piece 23 presses the lever, slide, or the like. 26 against its restoring force (arrow 25) in a different position to the outside, in which the example. mechanical control or electrical switching process is put into one operating state while it returns to the other operating state in the other position of the cam element 9 because of the release of the lever, slide, or the like. 26.
  • a connection of the operating states mentioned with the angular position of the carrier or its disk 3 can be programmed periodically over the circumference for the purpose Realize triggering of control or switching operations, wherein the angular movement of the disc 3 is carried out either mechanically or depending on the time from a linear stroke or an angular path.
  • FIG. 1 has the essential advantage that the forces for the abutment stops mentioned (end 19, locking bead 30) can be made smaller, because the restoring force (arrow 25) of the lever, slide, or the like, at least approximately is directed towards the bearing point 21 and thus cannot exert any force on the cam element 9 which pivots it into another presetting position.
  • the cross piece 23 is provided with a contact surface 33 so beveled that the restoring force acts perpendicularly on it, i.e. there is an at least approximately right angle between the direction of force (arrow 25) and the contact surface.
  • the disk 3 has essentially the same features as have already been described in connection with FIG. 1. For example, only the annular bulge 11 and the openings 13, 13a, 13b, etc. are mentioned again.
  • the section of FIG. 2a and the plan of FIG. 2b also show shift teeth 34 formed on one side on their outer circumference, which can be used for a stepper drive arrangement in which at least one stiff is on a circular line parallel to the axis of the disk of another carrier engages in the shift teeth for cam elements and rotates this disk in each case by an angular step of 1 / n of the circumference; this takes place jerkily.
  • the disc 3 with the switching teeth 34 can be jerked further by an angular step between two successive switching teeth. If then the cam elements 9 of both the one and the other disk together or via a differential lever arrangement on the lever, slide, or the like. 26 or 42 act, then in particular the disc provided with switching teeth can be used as a periodic lock for the other disc.
  • a cam element 9 is shown alone, so that the special features can be seen even more clearly: the bearing bush-like extension 22 on the rod-shaped part 8, the opening with a circular edge of more than 180 °, which serves as the bearing point 21 for the undrawn bead edge 11 (Fig. 1), the cross piece 23, the spring lug 18.
  • the cross piece 23 has a length 35 which is equal to the nth part of the circumference of the in the outer surface of the Totality of the cross pieces lying circle 36 minus an air gap.
  • a stop piece 37 can be seen in FIG. 3a, the length of which is dimensioned the same as that of the cross piece (based on the angle).
  • FIG. 4 shows another solution of the exemplary embodiment according to FIG. 1, in which the cam element 38 has the presetting extension 39 on one side of the bearing point 21 and the cross piece 40 on the opposite side - preferably with the same dimensions as in the other exemplary embodiment - having.
  • the lever, slide, or the like. 42 is arranged with its restoring force 41 in one position of the cam element 38 in the connecting line through the axis 43 of the bearing point 21. All The other features essential to the invention are identical or at least corresponding to the exemplary embodiment in FIG. 1.

Landscapes

  • Transmission Devices (AREA)
  • Snaps, Bayonet Connections, Set Pins, And Snap Rings (AREA)

Claims (13)

1. Support en forme de disque pour cames (9, 38) équipant un élément mobile (26; 42) et comportant:
- un moyeu (1) ainsi qu'un disque (3) fixé perpendiculairement à l'axe de ceIui-ci;
- des cames (9; 38) au moins approximativement en forme de barres à section transversale rectangulaire et portant un appendice (22), ainsi que
- des évidements qui sont pratiqués dans le sens radial et répartis d'une manière régulière à proximité de la circonférence du disque (3) en fonction du nombre de pas "n" d'un programme de rotation cyclique et qui assurent le guidage de ces cames oscillantes,

caractérisé en ce que le moyeu (1) forme, dans le sens axial et à une certaines distance du disque (3) un bourrelet annulaire (11) dont la section transversale au niveau du plan de coupe, contenant également l'axe (2a) du moyeu, est circulaire sur plus de la moitié de sa surface, en ce que l'appendice (22) des cames (9; 38) présente la forme d'un palier à coussinets (21) qui est réalisé dans un évidement supérieur à 180° pratiqué dans le plan de coupe axial et dont le diamètre est au moins approximativement égal au diamètre du bourrelet annulaire (11) afin que les cames (9; 38) montées sur ce bourrelet (11) effectuent, dans le plan de coupe axial, un mouvement d'oscillation autour de ce bourrelet, en ce que la force de rappel (25; 41) de l'élément mobile (26; 42) forme un angle droit avec sa section transversale et se dirige, à l'intérieur de celle-ci, au moins approximativement en direction du palier (21) et en ce que la came (9; 38) comporte sur sa face opposée au palier (21), une barre transversale sous forme de bras (23; 40) comportant une surface de contact (33) qui, en position inclinée de la came (9; 38) forme un angle droit avec le sens de la force de rappel (25; 4-1) (figures 1 et 4).
2. Support pour cames selon la revendication 1, caractérisé en ce que la distance qui sépare, dans le sens axial (16) le disque (3) du bourrelet (11) est approximativement égale à l'épaisseur (17) de ce disque (3).
3. Support pour cames selon l'une des revendications 1 ou 2, caractérisé en ce qu'en position de repos de la came (9; 38) un bec à ressort (18) fixé sur celle-ci s'applique par son extrémité libre et se maintient sous une certaine précontrainte, contre la paroi extérieure (31) de l'évidement pratiqué dans le sens axial et ce à une faible fraction (32) de l'épaisseur (17) du disque (3) au-dessus de l'arête inférieure (20) du percement (13) du disque (3) tournée vers le palier (21) (figure 1 a).
4. Support pour cames selon rune des revendications 1 à 3, caractérisé en ce que l'arête inférieure (20) des évidements (13) ménagés sur le disque (3) et coordonnée au talon de blocage (30) se trouvant sur la face d'un bec à ressort (18) opposée au palier (21), d'une part, et l'arête supérieure (29) de ces évidements (13) ménagée sur le disque (3) et coordonnée à la face extérieure (28) de la came (9; 38), d'autre part, constituent les butées pour la came (9; 38) en position renversée (figure 1 b).
5. Support pour cames selon l'une des revendications 1 à 4, caractérisé en ce que le moyeu (1) présente sur au moins une partie de sa longueur axiale, notamment dans la zone en forme de barre (8) de la came (9; 38) une coupe longitudinale en forme de cône.
6. Support pour cames selon l'une des revendications 1 à 5, caractérisé en ce que le bourrelet annulaire (11) du moyeu (1) et/ou le palier en forme de coussinet (21 ) de la came (9; 38) et/ou son bec à ressort (18) et/ou son talon de blocage (30) et/ou la barre tranversale (23; 40) de la came (9; 38) sont réalisés en une seule pièce dans un matériau thermoplastique et fixés sur la pièce porteuse correspondante.
7. Came pour le support selon l'une des revendications 1 à 6, caractérisée en ce que la longueur (35) de la barre transversale (23) parallèle au bord extérieur du bourrelet (11) correspond à la nième partie de la circonférence du cercle couvrant l'ensemble des barres transversales (36) déduction faite d'un entrefer (figure 3b).
8. Came selon la revendication 7 pour le support selon l'une des revendications 1 à 6, caractérisée en ce que dans la position non renversée de la came (9) la barre transversale (23) est fixée dans le sens de la hauteur axiale, entre le bourrelet (11) et le disque (3) du support avec ses évidements (13) de manière que sa paroi inférieure (24) se trouve dans un plan, situé en dehors de la zone de déplacement de l'élément mobile (26) entraîné par la force de rappel (flèche 25) selon un espace correspondant de préférence à la valeur d'un entrefer.
9. Came selon l'une des revendications 7 ou 8 pour le support selon l'une des revendications 1 à 6, caractérisée en ce que le came (38) présente sur l'extrémité opposée au disque (3) du support un prolongement (39) et en ce que en position de travail ou en position bloquée de la came (38), la barre transversale (40) se trouve au-delà de ce palier (21) et sur l'extrémité opposée à ce prolongement (39), soit au moins approximativement sur la ligne de prolongement passant par le palier (21) et l'élément mobile (42).
10. Came selon l'une des revendications 7 à 9 pour le support selon l'une des revendications 1 à 6, caractérisée en ce que l'évidement constituant le palier (21) est rainuré sur la face tournée vers le bourrelet (11) et porte dans la zone de ce bourrelet une butée (37) qui est parallèle à la barre transversale (23) et dont la longueur est supérieure à la largeur de l'élément en forme de barre (8), mais inférieure à la longueur de la barre transversale (23).
11. Utilisation du support pour cames selon l'une des revendications 1 à 6, le cas échéant, en liaison avec l'une des revendications 7 à 10, caractérisée en ce que le support entraîné en même temps qu'un autre support pour cames, par l'intermédiaire d'un train d'engrenages dont le rapport de transmission est différent de 1 (un) et en ce qu'il agit avec ce deuxième support sur l'élément mobile (26).
12. Utilisation du support pour cames selon la revendication 11, caractérisée en ce que, en plus de l'engrenage intermédiaire, il existe entre les cames des deux supports et l'élément mobile, un groupe de leviers différentiels sous la forme d'un élément de blocage unidirectionnel maintenu par un ressort, lui-même monté sur l'élément auxiliaire de l'élément mobile.
13. Utilisation du support pour cames selon l'une des revendications 11 et 12, caractérisée en ce que l'engrenage intermédiaire est constitué d'un mécanisme d'entraînement pas-à-pas selon lequel le disque (3) présente sur le périmètre extérieur des dents d'entraînement (34) dirigées vers l'extérieur, alors que le disque du deuxième support comporte au moins une broche, qui est fixée parallèlement à l'axe du support et sur un cercle ayant cet axe comme centre et qui engrène dans les dents d'entraînement (34) et provoque ainsi, à chaque encliquetage de la broche, l'avancement de ce deuxième disque sur une distance circonférentielle égale à 1/n de la circonférence de ce disque.
EP19790100354 1978-02-10 1979-02-08 Support en forme de disque pour cames, ainsi que cames pour un tel support et utilisation du support Expired EP0003596B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2805603 1978-02-10
DE19782805603 DE2805603C2 (de) 1978-02-10 1978-02-10 Scheibenradförmiger Träger für Nockenelemente

Publications (2)

Publication Number Publication Date
EP0003596A1 EP0003596A1 (fr) 1979-08-22
EP0003596B1 true EP0003596B1 (fr) 1983-03-09

Family

ID=6031600

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19790100354 Expired EP0003596B1 (fr) 1978-02-10 1979-02-08 Support en forme de disque pour cames, ainsi que cames pour un tel support et utilisation du support

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EP (1) EP0003596B1 (fr)
DE (1) DE2805603C2 (fr)
ES (1) ES247539Y (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2875943A1 (fr) 2004-09-29 2006-03-31 Otio France Sa Programmateur electronique et connecteur electrique programmable comportant un tel programmateur

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1615034A1 (de) * 1951-01-28 1970-05-14 Westdeutsche Elektrogeraete Elektrische Schaltuhr
GB1066434A (en) * 1962-11-27 1967-04-26 Sangamo Weston Improvements in or relating to adjustable control elements for time switches and the like
FR1522076A (fr) * 1967-04-27 1968-08-21 Bliss E W Co Dispositif à cames réglables
DE1807442A1 (de) * 1968-11-07 1970-06-11 Graesslin Feinwerktech Schaltscheibe fuer Zeitschaltgeraete

Also Published As

Publication number Publication date
ES247539Y (es) 1981-04-01
DE2805603A1 (de) 1979-08-16
EP0003596A1 (fr) 1979-08-22
DE2805603C2 (de) 1985-01-31
ES247539U (es) 1980-11-01

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