EP0003615B1 - Programmed switching device for washing machines, dish-washing machines and the like. - Google Patents

Programmed switching device for washing machines, dish-washing machines and the like. Download PDF

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Publication number
EP0003615B1
EP0003615B1 EP19790100438 EP79100438A EP0003615B1 EP 0003615 B1 EP0003615 B1 EP 0003615B1 EP 19790100438 EP19790100438 EP 19790100438 EP 79100438 A EP79100438 A EP 79100438A EP 0003615 B1 EP0003615 B1 EP 0003615B1
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EP
European Patent Office
Prior art keywords
wheel
indexing
pawl
program
switching mechanism
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
EP19790100438
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German (de)
French (fr)
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EP0003615B2 (en
EP0003615A1 (en
Inventor
Paolo Dipl.-Ing. Dapont
Celestino Brancaleone
Heinz Flakowski
Sergio Novali
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Eaton GmbH and Co KG
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Eaton GmbH and Co KG
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Publication date
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Application filed by Eaton GmbH and Co KG filed Critical Eaton GmbH and Co KG
Publication of EP0003615A1 publication Critical patent/EP0003615A1/en
Publication of EP0003615B1 publication Critical patent/EP0003615B1/en
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Publication of EP0003615B2 publication Critical patent/EP0003615B2/en
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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
    • H01H43/10—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 with timing of actuation of contacts due to a part rotating at substantially constant speed
    • H01H43/101—Driving mechanisms
    • H01H43/102—Driving mechanisms using a pawl and ratchet wheel mechanism

Definitions

  • the invention relates to a program switching mechanism for washing machines, dishwashers and the like.
  • switching gear supporting program switching With a rotatably mounted, assigned contacts actuating program carrier and a non-rotatably connected to this, switching gear supporting program switching, which can be incrementally stepped via the switching pawl of a toothed ratchet switching mechanism driven by an electric motor with programmable dwell times is for which at least one timing lever is provided which scans existing cams on the program carrier with a probe tip and controls the indexing movement of the switching pawl.
  • Such a program switching mechanism is known from DE-AS 20 40 464, in which a second switching wheel is rotatably mounted coaxially to the switching wheel connected in a rotationally fixed manner to the program roller, in which the tooth base circle diameter is larger than the tooth tip circle diameter of the switching wheel coupled to the program roller. So that the ratchet pawl with the larger diameter can also advance the ratchet wheel of the program roller, some tooth gaps are recessed in the larger ratchet wheel, so that the ratchet pawl turns both ratchet wheels one step further when entering the recessed tooth gap.
  • a rotating timing lever is pivotally mounted on the larger switching wheel, through which the deep tooth gap assigned to the timing lever can be covered, so that the pawl only corresponds to the position of the timing lever the larger ratchet or both ratchets transported.
  • the timing control lever has a probe tip that scans bones on the program roller and accordingly covers the assigned tooth gap.
  • roller is not completely interrupted, at least one of the deep tooth gaps of the large switching wheel must not be assigned a timing control lever, which results in the restriction that the program roller must be switched at least one step further with each rotation of the large switching wheel; larger pauses between the individual steps of the program roller cannot be achieved with the known device. Otherwise, the duration of the dwell time is fixed and cannot be changed.
  • the object of the invention is therefore to provide a program switching mechanism of the type mentioned that is characterized by a variety of possible uses, enables the use of several different lengths of stay for the program carrier and is characterized by a simple, reliable construction.
  • the program switching mechanism is characterized in that the freely programmable cam track scanning timing lever is mounted in a stationary manner and a step stop disk is arranged gearingly between the pawl and the timing lever, through which the pawl can be transferred into an ineffective position depending on the timing lever , and that the time control lever can be actuated by an assigned timer after the duration of the freely programmable dwell time in the sense of the subsequent release of the switching pawl automatically engaging with the program switching wheel.
  • the arrangement can be such that the switching stop member is formed by a step stop disc which is concentrically mounted to the program switching wheel and can be rotated to a limited extent, which has a smooth circumferential area, the radius of which is larger than the radius of the program switching wheel and on which there is an up to the gear teeth of another radius extending from the gear pawl adjoins the recess, the gear pawl being coupled only in the recessed position with the gear teeth of the other wheel.
  • the step stop disc can enable or prevent the program switching wheel from being driven by the switching pawl. The timing lever therefore only needs to control the position of the step stop disc.
  • a timing wheel with a switching toothing which interacts with the switching pawl the diameter of which is larger than the diameter of the program switching wheel and in whose switching toothing at least one into the concentric to the program switching wheel as a further wheel which can be advanced by the switching pawl Switch toothing of the program switching wheel is formed recess, the pawl is only coupled in the recessed position with the switching toothing of the program switching wheel.
  • the timing wheel can also have several depressions that are in the same Distances are distributed around its circumference.
  • the timing wheel is constantly driven by the switching pawl, which executes a smooth back and forth movement, as long as it is not held in the inactive position by the stepping stop disk which is appropriately controlled by the timing control lever.
  • the pawl can only engage with the gear teeth of the program ratchet when it engages in a recess in the timing wheel.
  • a basic time period is specified by the timing wheel, the length of which is determined by the distance between the depressions of the timing wheel and after the end of which the program carrier executes a new switching step each time.
  • the timing lever then allows this basic dwell time to be extended further as required by means of the step stop disc.
  • the constructive design can expediently be such that the step stop disc carries a stop with which it can be supported in a direction of rotation against the timing lever pivoted into the movement path of the stop under rotationally fixed locking, with the pawl on the smooth circumferential area of the non-rotatably supported step stop disc Crotch stop disc rests.
  • the switching teeth of the program switching wheel can have at least one extended tooth protruding into the path of movement of the pawl in the inactive position, which causes the pawl to be independent of the position of the stepping plate appropriate position of the program switching wheel can switch this by one tooth.
  • at least one timing lever can be coupled to an optionally actuable actuator, through which it can be moved into a position releasing the crotch stop. In this way it is possible to make a selection from the outside among the available dwell times.
  • the step stop disk can also be coupled to an optionally actuable actuating member, by means of which it can be rotated into a position in which the pawl is slidably held on the smooth peripheral region of the step stop disk.
  • This actuator can for example be coupled to the so-called thermostop of a washing machine.
  • the new program switching mechanism is extremely versatile in its application; it has a simple, clear structure and is characterized by great operational reliability.
  • the program switching mechanism has two work plates 1, 2 which are aligned parallel to one another and spaced apart by spacer bolts 3 and associated screws (not shown in FIG. 1) which are screwed through screw holes 4 into the spacer bolts 3 on the end face, parallel to one another.
  • a program carrier 5 in the form of a cam roller or drum is arranged between the two work plates 1, 2 and carries a number of separate cam tracks 6 arranged at a distance from one another on its circumference.
  • the cam roller 5 is rotatably mounted on an axis 7 which is inserted into corresponding bores 8, 9 of the work plates 1, 2.
  • a coaxial program switching wheel 10 is connected in a rotationally fixed manner to the program roller 5 and is provided with a switching toothing 11 on its circumference.
  • the program roller 5 has a coaxial hub 12 in the region of the program switching wheel 10, on which - with the interposition of suitable, optionally formed-on spacer rings 13 (FIG. 4) - a step stop disc 14 and a timing wheel 15 are freely rotatably mounted.
  • the step stop disc 14 is with a integrally formed, radially projecting arm 16, which at the end merges into a hook 17 (FIG. 3), on which a tension spring 18 engages, the other end being anchored in place at 19 on a holding part of the work plate 2.
  • a smooth circumferential region 20 is present on the step stop disc 14, which is curved in a circular shape and whose radius is larger than the radius of the switching toothing 11 of the program switching wheel 10, as well as a switching toothing 21 of the timing wheel 15
  • the predetermined central angle extending smooth circumferential region 20 is delimited by a wedge-shaped recess 22, which is followed by a single tooth 23, which ends at a slightly smaller diameter radially on the outside than corresponds to the outer diameter of the toothing 21 of the timing wheel 15.
  • a small latching depression 24 then follows on the individual tooth 23 in the manner shown in FIGS. 1, 2.
  • the step stop disk 14 also carries an approximately L-shaped stop arm 25, which is offset from the arm 16 by approximately 120 ° and protrudes radially on the step stop disk 14 such that the actual stop leg 26 of the stop arm 25 is essentially parallel to the axis 7 extends.
  • a pawl 27 of a pawl switching mechanism interacts, which is accommodated in a housing 280, which in turn is held between the two work plates 1, 2.
  • the pawl 27 is rotatably supported at the end on an eccentric 28 (FIG. 3) which is rotated by a synchronous motor 30 placed on the housing 280 via a gearwheel train accommodated in the housing 280.
  • the synchronous motor 30 is provided with a drive pinion 31 which meshes with a gear of the gear train 29.
  • tension spring 33 On the pawl 27 engages an end anchored in the housing 280 tension spring 33, the task of which is to hold the pawl 27 elastically in engagement with the gear teeth 11 of the program gear wheel 10 or the gear teeth 21 of the timing wheel 15.
  • the switching toothing 11 of the program ratchet wheel 10 is assigned a latching pawl 34 which is pivotably mounted on one of the spacer bolts 3 and whose pawl arm 35 is held elastically in engagement with the Sci l old toothing 11 by a tension spring 36 anchored on the end of the work plate 1.
  • a pawl 38 pivotally mounted on a fixed axis 37 interacts, which is connected to a spring arm 39, which is supported at the end and supports it elastically in engagement with the gear teeth 21, as is the case with ratchet derailleurs is common.
  • the diameter of the timing wheel 15 is slightly larger than that of the program ratchet 10, so that the pawl 27 is normally only engaged with the gear teeth 21 of the timing wheel 15 and this can advance.
  • four wedge-shaped recesses 40 are formed, for example, which are arranged on the circumference of the timing wheel 15 at equal intervals, which means that the same number of teeth of the switching teeth 21 lies between adjacent recesses 40.
  • the depressions 40 protrude into the switching toothing 11 of the program switching wheel 10, so that when the pawl 27 engages in a recess 40, it simultaneously engages in the switching toothing 11 of the program switching wheel 10 and can advance it by one switching step during its advancing movement .
  • the synchronous motor 30 drives the eccentric 28 via the gearwheel train 29 and thus the pawl 27 executes its reciprocating transport movement, it gives the timing wheel a smooth step movement, which due to the larger diameter of the switching toothing 21 then only from a corresponding step movement of the Program switching wheel 10 is accompanied when the pawl 27 engages in a recess 40, and thus the recess 40 is synchronized with a corresponding tooth gap of the switching teeth 11.
  • the cam tracks 6 of the cam roller 5 are scanned by cam buttons 41 of individual contact systems 42, which are arranged in sets lying side by side in two contact carriers 43.
  • the contact carriers 43 are rigidly clamped in the manner shown in FIG. 1 in the areas of the top and the bottom of the program switching mechanism with the work plates 1, 2, for which purpose pins 44 formed on the contact carriers 43 engage in corresponding holes 45 in the work plates 1, 2.
  • the contact carriers 43 are otherwise covered by cover plates 46 to the outside; the electrical connections of the contact systems 42 are illustrated at 47.
  • a toothed ring 49 On a hub part 48 of the cam roller 5, a toothed ring 49, referred to as a turning ring, is freely rotatable, which meshes with a gearwheel 500 (FIG. 3) of the gearwheel train 29 and drives a turning gearwheel 50, which is non-rotatably coupled to a turning cam drum 51, which laterally next to the cam roller 5 is rotatably mounted lying in the work plates 1, 2 by means of an assigned axis 52.
  • the reversible cam roller 51 carries reversible cam tracks 54 which are scanned by two-armed cam levers 55 which are pivotably mounted between the work plates 1, 2 and which in turn actuate associated contact systems 42 in the lower contact carrier 43.
  • the turning cam roller 51 is used, for example in washing machines, to effect the change in direction of the washing drum required for the washing process.
  • the pawl 27 can be temporarily disabled by the step stop disk 14.
  • the step stop disk 14 works together with four timing levers 56, 57, which are pivotably mounted on a spacer 3 lying next to one another.
  • the timing control levers 56 are designed as two-armed levers; its first lever arm carries a probe tip 58 which scans a cam track 6a or 6b of the cam roller 5, as can be seen from FIG. All timing levers 56, 57 are essentially L-shaped, their second lever arm having a control tip 60 at the end.
  • timing control levers 56, 57 are elastically biased by the tongues of a comb spring 620 anchored on the end of a housing 61 inserted between the work plates 1, 2 in the sense that the probe tips 58 are pressed against the cam tracks 6a, 6b .
  • one timing control lever 56 is coupled to the timing control lever 57 adjacent to it by a pin 62 on the latter, which is arranged laterally above and which, in the manner shown in FIG. 3, for example, rests on the lever arm assigned to the probe tip 58 or on a lateral extension 63 of this lever arm.
  • the tongues of the comb spring 620 press on the arms 63, as can be seen from FIG. 3.
  • a timing gear 65 is rotatably mounted on an axis 650 between the two work plates 1, 2, which has a ratchet toothing 66 which cooperates with a latching pawl pivotably mounted on the associated spacer bolt 3.
  • the latching pawl 67 is held elastically in engagement with the latching toothing 66 of the timing gear 65 by a wrap spring 68 (FIG. 1); it has a second lever arm 69, which is offset by approximately 120 ° with respect to the lever arm which engages with the locking toothing 66, and is formed at the end with a probe tip 70, which can be seen in the gear teeth 11 of the program in the manner shown in FIG. 3, for example -Shifting wheels 10 engages.
  • the timing wheel 65 carries a coaxial timing cam 72 which is connected to it in a rotationally fixed manner and which is scanned by the control tips 60 of the timing control levers 56, 57.
  • the timer cam 72 has four side-by-side cam tracks, which have a common falling edge visible at 73 in FIG. 2 and whose leading edges, one of which is indicated at 74, are offset from one another such that when the timer cam 72 rotates, the timing levers 56, 57 can be pivoted at different times, as will be explained in more detail below.
  • a wrap spring 76 is placed, which acts as a return spring and is anchored on one side to a projection 77 of the timing wheel 65, while it is supported on its other side on an extension 78 of the work plate 2.
  • the gradual drive of the timing wheel 65 is done by a rotationally fixedly connected to the turning gear 50 radial cam 79, which engages in the locking teeth 66 of the timing gear 65, such that the timing gear 65 is switched by one step when the turning gear 50 is rotated.
  • each formed stop part 80 or 81 is pivoted radially outward with respect to the axis 7 of the cam roller 5 so that the stop parts 80, 81 lie outside the path of movement of the stop leg 26 of the time control lever 14.
  • the synchronous motor 30 drives in the manner already described, via the eccentric 28, the pawl 27, which lies in the recess 22 of the step stop disc 14 and engages with the switching toothing 21 of the timing wheel 15 and advances it step by step, the step stop disc 14 countering the elastic action the tension spring 18 executes a reciprocating oscillating movement about its axis of rotation.
  • the switching pawl 27 is coupled to the switching teeth 11 of the program switching wheel 10, with which the cam roller 5, which had been stationary until then, is rotated further by one switching step becomes what triggers corresponding switching processes in the contact systems 42.
  • the latching pawl 67 of the timing switching wheel 65 which engages with the probe tip 70 in the switching toothing 11 of the program switching wheel 10, is pivoted clockwise, with reference to FIG. 3, whereby it disengages from the latching toothing 66 of the timing switching wheel 65. and this can be returned by the wrap spring 76 back to its rest position given by the stop 78.
  • the probe tip 58 of the timing control lever 56 falls into a recess 82 in the cam track 6a, with which the associated timing control lever 56, compared to the position according to FIG is pivoted clockwise, as shown in Figure 5.
  • the stop part 80 of the timing control lever 56 comes into the path of movement of the stop leg 26 of the step stop disc 14, which is thus locked against rotation in the counterclockwise direction.
  • the pawl 27 can now no longer take the step stop disk 14 with it on its forward stroke; it runs because of the wedge-shaped shape of its probe tip from the recess 22 of the stepping plate 14 and reaches the smooth peripheral region 20 of the stepping plate 14, the radium of which is larger than that of the timing wheel 15, with the result that the pawl 27 thus moves out of the Gear teeth 21 of the timing wheel 15 is excavated and this can no longer advance.
  • the arrangement is such that the individual tooth 23, which is followed by a less deep recess 24, is arranged after the recess 22 in the manner shown in FIG.
  • the individual tooth 23 does not extend all the way to the outer circumference of the shift teeth of the shift toothing 21.
  • the step-stop disc 14 is taken along somewhat frictionally, so that the "deep" recess 22 is covered by a switching tooth of the switching toothing 21 and the probe tip of the pawl 27 is guided via the individual tooth 23 into the "lower" recess 24 , in which it is at a safe distance from the gear teeth 21.
  • the forward stroke of the pawl 27 it is then directed in the opposite manner back onto the smooth peripheral region 20.
  • timing lever 56 Due to the mentioned pivoting of the timing lever 56, its control tip 60, based on FIG. 5, was also moved downward, so that it comes into the area of the assigned cam track of the timing cam 72, while the control tip 60 of the timing lever 56 with this pin 62 coupled timing lever 57 is lifted out of the cam track in the manner shown in FIG. 5 because it is higher by the corresponding amount. Since the timing gear 65 is continuously rotated clockwise by the cam 79, the leading edge 74 of the corresponding cam track finally runs onto the lowered control tip 60 of the pivoted timing lever 56, with the result that the timing lever 56 is pivoted counterclockwise (FIG. 5).
  • the stop part 80 of the timing control lever 56 is moved out of the movement path of the stop lever 26 in a counterclockwise direction (FIG. 5), with the result that the step stop disc 14 is released again.
  • the switching pawl 27 falls with its probe tip into the recess 22 of the step stop disc 14, with which it is coupled to the switching toothing 21 of the current wheel 15 and this is driven.
  • the program switching wheel 10 is also rotated one step further.
  • the catch 67 of the timing wheel 65 is pivoted clockwise (FIG. 5) in the manner already described and is thereby released from the locking teeth 66 of the timing wheel 65.
  • the timing gear 65 is then rotated back into the rest position by the wrap spring 68.
  • the cam tracks 6a, 6b also have depressions 83 which extend radially further to the axis 7, i.e. are "deeper".
  • the recesses 82, 83 are of course each distributed according to the program over the circumference of the cam tracks 6a, 6b.
  • the step stop disk 14 cannot be unlocked because it is still held by the stop part 81 of the timing lever 57. Only when the control tip 60 of this timing control lever 57 is raised by the run-up edge 74 assigned to it, is the step stop disc 14 released by correspondingly pivoting the stop part 81 in the counterclockwise direction.
  • the switching toothing 11 of the program switching wheel 10 is provided with a longer tooth 90 (for example FIG. 5), which is dimensioned such that it projects radially beyond the smooth peripheral region 20 of the step stop disc 14.
  • the program switching wheel 10 is switched on independently of the timing wheel 15, the dwell time then being determined by the eccentric 28 stroke time for the pawl 27 .
  • step-by-step mechanisms that are provided with an overdrive device, the need occasionally arises from the outside. forth, i.e. independent of the programming of the actual program carrier, to be able to choose one of two dwell times In the program switching mechanism described, this can be done in a very simple manner in that, in the manner shown in FIG.
  • an actuating lever 91 is pivotably mounted on the work plate 2 about an axis 92, which lever arm 93 has a corresponding pin of one or more timing lever 56 or 57 engages, If the actuating lever is pivoted clockwise ( Figure 7), the corresponding timing lever is moved out of the path of movement of the stop leg 26 of the step stop disc 14, whereby the step stop disc 14 is unlocked and the cam roller 5 can be switched on in the manner already explained.
  • the selection of the dwell time takes place by means of the actuating lever 91 in a purely mechanical way, which means that the otherwise frequently required electromechanical transmission devices and the like. omitted.
  • a pull magnet 94 actuated by a temperature sensor, not shown, is arranged between the work plates 1, 2, the armature 95 of which can pivot, via a lever 96, a sleeve 97 rotatably mounted on the axis 7, on which the program drum 5 is freely rotatably mounted and that to one between the crotch stopper 14 and the timing Wheel 15 arranged, rotatably connected to it actuating arm 98 extends, which can cooperate with the stop leg 26 pointing radially outward.
  • the actuating arm 98 is normally in the angular range between the arm 16 and the stop arm 25.
  • step stop disk 14 can again assume its normal function in the manner already explained.
  • the timing control levers 56, 57 can be actuated by the cam tracks of the timing switching cam 72, which in turn is driven by the timing gear 65.
  • the arrangement can also be such that a timing lever immediately scans the timing wheel 15, the duration of the dwell times that can be set (in addition to the basic dwell time) Number of corresponding control wells arranged on the timing wheel 15 depends.

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Description

Die Erfindung betrifft ein Programmschaltwerk für Waschmaschinen, Geschirrspülmaschinen und dgl. mit einem drehbar gelagerten, zugeordnete Kontakte betätigenden Programmträger und einem drehfest mit diesem verbundenen, eine Schaltverzahnung tragenden Programm-Schaltwerd, das über die Schaltklinke eines von einem Elektromotor angetriebenen Zahnklinkschaltwerkes mit programmierbaren Verweilzeiten schrittweise fortschaltbar ist, wozu wenigstens ein zeitsteuerhebel vorgesehen ist, der mit einer Tastspitze auf dem Programmträger vorhandene Nocken abtastet und die Fortschaltbewegung der Schaltklinke steuert.The invention relates to a program switching mechanism for washing machines, dishwashers and the like. With a rotatably mounted, assigned contacts actuating program carrier and a non-rotatably connected to this, switching gear supporting program switching, which can be incrementally stepped via the switching pawl of a toothed ratchet switching mechanism driven by an electric motor with programmable dwell times is for which at least one timing lever is provided which scans existing cams on the program carrier with a probe tip and controls the indexing movement of the switching pawl.

Aus der DE-AS 20 40 464 ist ein derartiges Programmschaltwerk bekannt, bei dem koaxial zu dem drehfest mit der Programmwalze verbundenen Schaltrad ein zweites Schaltrad drehbar gelagert ist, bei dem der Zahngrundkreisdurchmesser größer als der Zahnkopfkreisdurchmesser des mit der Programmwalze gekuppelten Schaltrades ist. Damit die das Schaltrad mit dem größeren Durchmesser fortschaltende Schaltklinke auch das Schaltrad der Programmwalze fortschalten kann, sind in dem größeren Schaltrad einige Zahnlücken vertieft ausgeführt, so daß die Schaltklinke beim Einfall in die vertiefte Zahnlücke beide Schalträder um einen Schritt weiterdreht.Such a program switching mechanism is known from DE-AS 20 40 464, in which a second switching wheel is rotatably mounted coaxially to the switching wheel connected in a rotationally fixed manner to the program roller, in which the tooth base circle diameter is larger than the tooth tip circle diameter of the switching wheel coupled to the program roller. So that the ratchet pawl with the larger diameter can also advance the ratchet wheel of the program roller, some tooth gaps are recessed in the larger ratchet wheel, so that the ratchet pawl turns both ratchet wheels one step further when entering the recessed tooth gap.

Um nun die Schrittzeit der Programmwalze, abhängig von deren Stellung, zu verlängern, ist auf dem größeren Schaltrad ein mit diesem umlaufender Zeitsteuerhebel schwenkbar gelagert, durch den wahlweise die dem Zeitsteuerhebel zugeordnete tiefe Zahnlücke abdeckbar ist, so daß entsprechend der Lage des Zeitsteuerhebels die Schaltklinke nur das größere Schaltrad oder aber beide Schalträder weitertransportiert. Hierzu trägt der Zeitsteuerhebel eine Tastspitze, die Nochen auf der Programmwalze abtastet und dementsprechend die zugeordnete Zahnlücke abdeckt.
walze nicht vollständig unterbrochen ist, darf wenigstens einer der tiefen Zahnlücken des grossen Schaltrades kein Zeitsteuerhebel zugeordnet sein, woraus sich die Einschränkung ergibt, daß bei jeder Umdrehung des großen Schaltrades die Programmwalze wenigstens um einen Schritt weitergeschaltet werden muß; größere Pausen zwischen den einzelnen Schritten der Programmwalze sind mit der bekannten Vorrichtung nicht zu erzielen. Im übrigen ist hier die Dauer der Verweilzeit starr festgegeben und nicht veränderbar.In order to extend the step time of the program roller, depending on its position, a rotating timing lever is pivotally mounted on the larger switching wheel, through which the deep tooth gap assigned to the timing lever can be covered, so that the pawl only corresponds to the position of the timing lever the larger ratchet or both ratchets transported. For this purpose, the timing control lever has a probe tip that scans bones on the program roller and accordingly covers the assigned tooth gap.
roller is not completely interrupted, at least one of the deep tooth gaps of the large switching wheel must not be assigned a timing control lever, which results in the restriction that the program roller must be switched at least one step further with each rotation of the large switching wheel; larger pauses between the individual steps of the program roller cannot be achieved with the known device. Otherwise, the duration of the dwell time is fixed and cannot be changed.

Aufgabe der Erfindung ist es, deshalb ein Programmschaltwerk der eingangs genannten Art zu schaffen, daß sich durch vielfältige Einsatzmöglichkeiten auszeichnet, die Verwendung mehrerer unterschiedlich langer Verweilzeiten für den Programmträger ermöglicht und sich dabei durch einen einfachen, betriebssicheren Aufbau auszeichnet.The object of the invention is therefore to provide a program switching mechanism of the type mentioned that is characterized by a variety of possible uses, enables the use of several different lengths of stay for the program carrier and is characterized by a simple, reliable construction.

Zur Lösung dieser Aufgabe ist das Programmschaltwerk gemäß der Erfindung dadurch gekennzeichnet, daß der frei programmierbare Nockenbahnen abtastende Zeitsteuerhebel ortsfest gelagert ist und getrieblich zwischen der Schaltklinke sowie dem Zeitsteuerhebel eine Schrittstoppscheibe angeordnet ist, durch die abhängig von dem Zeitsteuerhebel die Schaltklinke in eine unwirksame Lage überführbar ist, und daß der Zeitsteuerhebel durch einen zugeordneten Zeitschalter nach Ablauf der in der Dauer frei programmierbaren Verweilzeit im Sinne der anschließenden Freigabe des selbsttätig mit dem Programmschaltrad in Eingriff kommenden Schaltklinke betätigbar ist.To solve this problem, the program switching mechanism according to the invention is characterized in that the freely programmable cam track scanning timing lever is mounted in a stationary manner and a step stop disk is arranged gearingly between the pawl and the timing lever, through which the pawl can be transferred into an ineffective position depending on the timing lever , and that the time control lever can be actuated by an assigned timer after the duration of the freely programmable dwell time in the sense of the subsequent release of the switching pawl automatically engaging with the program switching wheel.

Durch entsprechende Ausbildung der von dem Zeitsteuerhebel abgetasteten Nockenbahnen des Programmträgers und des Zeitschalters können damit in weiten Grenzen unterschiedliche Verweilzeiten des Programmträgers an beliebigen Stellen innerhalb des Programms entsprechend dem jeweiligen Anwendungszweck des Programmschaltwerkes vorgegeben werden.By appropriately designing the cam tracks of the program carrier and the timer, which are scanned by the time control lever, different dwell times of the program carrier can be predetermined within wide limits at any point within the program according to the respective application of the program switching mechanism.

In einer bevorzugten Ausführungsform kann die Anordnung derart getroffen sein, daß das Schaltstoppglied durch eine konzentrisch zu dem Programmschaltrad gelagerte und begrenzt drehbare Schrittstoppscheibe gebildet ist, die einen glatten Umfangsbereich aufweist, dessen Radius größer ist als der Radius des Programmschaltrades und an den sich eine bis in die Schaltverzahnung eines anderen von der Schaltklinke vorschaltbaren Radius reichende Vertiefung anschließt, wobei die Schaltklinke lediglich in der in die Vertiefung eingefallenen Lage mit der Schaltverzahnung des anderen Rades gekuppelt ist. Je nach ihrer Stellung kann damit die Schrittstoppscheibe einen Antrieb des Programmschaltrades durch die Schaltklinke ermöglichen oder verhindern. Der Zeitsteuerhebel braucht somit lediglich die Lage der Schrittstopscheibe anzusteuern.In a preferred embodiment, the arrangement can be such that the switching stop member is formed by a step stop disc which is concentrically mounted to the program switching wheel and can be rotated to a limited extent, which has a smooth circumferential area, the radius of which is larger than the radius of the program switching wheel and on which there is an up to the gear teeth of another radius extending from the gear pawl adjoins the recess, the gear pawl being coupled only in the recessed position with the gear teeth of the other wheel. Depending on their position, the step stop disc can enable or prevent the program switching wheel from being driven by the switching pawl. The timing lever therefore only needs to control the position of the step stop disc.

Dabei kann konzentrisch zu dem Programm- Schaltrad als weiteres von der Schaltklinke fortschaltbares Rad ein zeitgebendes Rad mit einer mit der Schaltklinke zusammenwirkenden Schaltverzahnung frei drehbar gelagert sein, dessen Durchmesser größer ist als der Durchmesser des Programm-Schaltrades und in dessen Schaltverzahnung wenigstens eine bis in die Schaltverzahnung des Programm-Schaltrades reichende Vertiefung ausgebildet ist, wobei die Schaltklinke lediglich in der in die Vertiefung eingefallenen Lage mit der Schaltverzahnung des Programm-Schaltrades gekuppelt ist. Das zeitgebende Rad kann auch mehrere Vertiefungen aufweisen, die in gleichen Abständen rings um seinen Umfang verteilt angeordnet sind.In this case, a timing wheel with a switching toothing which interacts with the switching pawl, the diameter of which is larger than the diameter of the program switching wheel and in whose switching toothing at least one into the concentric to the program switching wheel as a further wheel which can be advanced by the switching pawl Switch toothing of the program switching wheel is formed recess, the pawl is only coupled in the recessed position with the switching toothing of the program switching wheel. The timing wheel can also have several depressions that are in the same Distances are distributed around its circumference.

Das zeitgebende Rad wird von der eine gleichmäßige Hin- und Herbewegung ausführenden Schaltklinke ständig angetrieben, solange sie nicht durch die von dem Zeitsteuerhebel entsprechend angesteuerte Schrittstopscheibe in der unwirksamen Lage gehalten ist. Die Schaltklinke kann dabei aber lediglich dann mit der Schaltverzahnung des Programm-Schaltrades in Eingriff kommen, wenn sie in eine Vertiefung des zeitgebenden Rades einfällt. Auf diese Weise wird von dem zeitgebenden Rad eine Grundzeitdauer vorgegeben, deren Länge von dem Abstand der Vertiefungen des zeitgebenden Rades bestimmt ist und nach deren Ablauf der Programmträger jedesmal einen neuen Schaltschritt ausführt. Der Zeitsteuerhebel gestattet es sodann mittels der Schrittstopscheibe diese Grundverweilzeit weiter bedarfsgemäß zu dehnen.The timing wheel is constantly driven by the switching pawl, which executes a smooth back and forth movement, as long as it is not held in the inactive position by the stepping stop disk which is appropriately controlled by the timing control lever. However, the pawl can only engage with the gear teeth of the program ratchet when it engages in a recess in the timing wheel. In this way, a basic time period is specified by the timing wheel, the length of which is determined by the distance between the depressions of the timing wheel and after the end of which the program carrier executes a new switching step each time. The timing lever then allows this basic dwell time to be extended further as required by means of the step stop disc.

Die konstruktive Ausbildung kann zweckmäßiger weise derart getroffen sein, daß die Schrittstopscheibe einen Anschlag trägt, mit dem sie gegen den in den Bewegungsweg des Anschlages eingeschwenkten Zeitsteuerhebel unter drehfester Verriegelung in einer Drehrichtung abstützbar ist, wobei bei drehfest abgestützter Schrittstopscheibe die Schaltklinke auf dem glatten Umfangsbereich der Schrittstopscheibe aufliegt.The constructive design can expediently be such that the step stop disc carries a stop with which it can be supported in a direction of rotation against the timing lever pivoted into the movement path of the stop under rotationally fixed locking, with the pawl on the smooth circumferential area of the non-rotatably supported step stop disc Crotch stop disc rests.

Um zusätzlich Vorsorge für eine sehr kurze Verweilzeit zu treffen, kann die Schaltverzahnung des Programm-Schaltrades wenigstens einen in den Bewegungsweg der in der unwirksamen Lage stehenden Schaltklinke ragenden, verlängerten Zahn aufweisen, der bewirkt, daß die Schaltklinke unabhängig von der Stellung der Schrittstopscheibe, bei entsprechender Stellung des Programm-Schaltrades dieses um einen Zahn weiterschalten kann. Im übrigen kann wenigstens ein Zeitsteuerhebel mit einem wahlweise betätigbaren Betätigungsglied gekuppelt sein, durch das er in eine die Schrittstopscheibe freigebende Stellung überführbar ist. Auf diese Weise ist es möglich, von außen her eine Auswahl unter den zur Verfügung stehenden Verweilzeiten durchzuführen. Auch kann die Schrittstopscheibe mit einem wahlweise betätigbaren Betätigungsorgan gekuppelt sein, durch das sie in eine Stellung verdrehbar ist, in der die Schaltklinke auf dem glatten Umfangsbereich der Schrittstopscheibe gleitend gehalten ist. Dieses Betätigungsorgan kann beispielsweise mit dem sog. Thermostop einer Waschmaschine gekuppelt sein. Durch Verriegelung der Schrittstopscheibe wird damit verhindert, daß der Programmträger weitergeschaltet wird, bis der Thermostop ein weiteres Schaltsignal abgibt und die Schrittstopscheibe freigegeben wird.In order to additionally provide for a very short dwell time, the switching teeth of the program switching wheel can have at least one extended tooth protruding into the path of movement of the pawl in the inactive position, which causes the pawl to be independent of the position of the stepping plate appropriate position of the program switching wheel can switch this by one tooth. In addition, at least one timing lever can be coupled to an optionally actuable actuator, through which it can be moved into a position releasing the crotch stop. In this way it is possible to make a selection from the outside among the available dwell times. The step stop disk can also be coupled to an optionally actuable actuating member, by means of which it can be rotated into a position in which the pawl is slidably held on the smooth peripheral region of the step stop disk. This actuator can for example be coupled to the so-called thermostop of a washing machine. By locking the step stop disc, it is prevented that the program carrier is switched on until the thermostop emits another switching signal and the step stop disc is released.

Das neue Programmschaltwerk ist in seiner Anwendung außerordentlich vielseitig; es weist einen einfachen, übersichtlichen Aufbau auf und zeichnet sich durch eine große Betriebssicherheit aus.The new program switching mechanism is extremely versatile in its application; it has a simple, clear structure and is characterized by great operational reliability.

Weitere Merkmale des neuen Programmschaltwerkes sind Gegenstand von Unteransprüchen.Further features of the new program switching mechanism are the subject of subclaims.

In der Zeichnung ist ein Ausführungsbeispiel des Gegenstandes der Erfindung dargestellt. Es zeigen

  • Figur 1 ein Programmschaltwerk gemäß der Erfindung in perspektivischer Darstellung, mit auseinander gezogenen Einzelteilen, Figur 2 das Programmschaltwerk nach Figur 1 im Ausschnitt, in einem anderen Maßstab und in entsprechender Darstellung, Figur 3 das Programmschaltwerk nach Figur 1 im Querschnitt, in einer Seitenansicht unter Veranschaulichung des Zustandes bei freibeweglicher Schrittstopscheibe, Figur 4 das Programmschaltwerk nach Figur 1 in einer Draufsicht, teilweise im Schnitt, mit seitlich versetzt gezeichneter Wendenockensteuerung, Figur 5 das Programmschaltwerk nach Figur 1 in einer Darstellung entsprechend Figur 3 unter Veranschaulichung des Zustandes bei in eine Vertiefung des Programmträgers eingefallenem Zeitsteuerhebel, Figur 6 das Programmschaltwerk nach Figur 1 in einer Darstellung entsprechend Figur 3 unter Veranschaulichung des Zustandes bei in eine "tiefe" Vertiefung des Programmträgers eingefallenem Zeitsteuerhebel und Figur 7 das Programmschaltwerk nach Figur 1 in einer Ausführungsform mit zusätzlichem Betätigungshebel für den Zeitsteuerhebel in einer Darstellung entsprechend Figur 3.
In the drawing, an embodiment of the object of the invention is shown. Show it
  • 1 shows a program switch according to the invention in a perspective view, with individual parts pulled apart, FIG. 2 shows the program switch according to FIG. 1 in detail, on a different scale and in a corresponding representation, FIG. 3 shows the program switch according to FIG. 1 in cross section, in a side view with illustration 4 shows the program switching mechanism according to FIG. 1 in a top view, partly in section, with the turning cam control shown laterally offset, FIG. 5 shows the program switching mechanism according to FIG. 1 in a representation corresponding to FIG. 3, illustrating the state when the program carrier is deepened 1, the program switching mechanism according to FIG. 1 in a representation corresponding to FIG. 3, illustrating the state when the timing control lever has fallen into a “deep” depression of the program carrier, and FIG. 7, the program switching mechanism according to FIG n an embodiment with an additional actuating lever for the timing control lever in a representation corresponding to FIG. 3.

Das Programmschaltwerk weist zwei Werkplatten 1, 2 auf, die durch Abstandsbolzen 3 und zugeordnete, in Figur 1 nicht weiter dargestellte Schrauben, die durch Schraubenlöcher 4 verlaufend in die Abstandsbolzen 3 stirnseitig eingeschraubt werden, parallel zueinander ausgerichtet, im gegenseitigen Abstand miteinander verbunden sind. Zwischen den beiden Werkplatten 1, 2 ist ein Programmträger 5 in Gestalt einer Nockenwalze oder - trommel angeordnet, die an ihrem Umfang eine Anzahl getrennter, im Abstand nebeneinander angeordneter Nockenbahnen 6 trägt. Die Nockenwalze 5 ist auf einer Achse 7 drehbar gelagert, die in entsprechende Bohrungen 8, 9 der Werkplatten 1, 2 eingesetzt ist. Im Bereiche einer Stirnseite ist mit der Programmwalze 5 ein koaxiales Programm-Schaltrad 10 drehfest verbunden, welches an seinem Umfang mit einer Schaltverzahnung 11 versehen ist. Die Programmwalze 5 weist eine koaxiale Nabe 12 im Bereiche des Programm-Schaltrades 10 auf, auf welcher-unter Zwischenlage geeigneter, gegebenenfalls angeformter Abstandsringe 13 (Figur 4)-eine Schrittstopscheibe 14 und ein zeitgebendes Rad 15 frein drehbar gelagert sind. Die Schrittstopscheibe 14 ist mit einem angeformten, radial vorstehenden Arm 16 ausgebildet, der endseitig in einen Haken 17 (Figur 3) übergeht, an welchem eine Zugfeder 18 angreift, die anderenends bei 19 an einem Halterungsteil der Werkplatte 2 ortsfest verankert ist. Anschließend an den Arm 16 ist an der Schrittstopscheibe 14 ein glatter Umfangsbereich 20 vorhanden, der kreisförmig gekrümmt ist und dessen Radius größer ist als der Radius der Schaltverzahnung 11 des Programm-Schaltrades 10, sowie einer Schaltverzahnung 21 des zeitgebenden Rades 15. Der sich über einen vorbestimmten Zentriwinkel erstreckende glatte Umfangsbereich 20 ist durch eine keilförmige Vertiefung 22 begrenzt, an die sich ein einzelner Zahn 23 anschließt, welcher auf einem geringfügig kleineren Durchmesser radial außen endet, als dies dem Außendurchmesser der Verzahnung 21 des zeitgebenden Rades 15 entspricht. Auf den einzelnen Zahn 23 folgt sodann eine kleine Rastvertiefung 24 in der aus Figur 1, 2 ersichtlichen Weise.The program switching mechanism has two work plates 1, 2 which are aligned parallel to one another and spaced apart by spacer bolts 3 and associated screws (not shown in FIG. 1) which are screwed through screw holes 4 into the spacer bolts 3 on the end face, parallel to one another. A program carrier 5 in the form of a cam roller or drum is arranged between the two work plates 1, 2 and carries a number of separate cam tracks 6 arranged at a distance from one another on its circumference. The cam roller 5 is rotatably mounted on an axis 7 which is inserted into corresponding bores 8, 9 of the work plates 1, 2. In the area of one end face, a coaxial program switching wheel 10 is connected in a rotationally fixed manner to the program roller 5 and is provided with a switching toothing 11 on its circumference. The program roller 5 has a coaxial hub 12 in the region of the program switching wheel 10, on which - with the interposition of suitable, optionally formed-on spacer rings 13 (FIG. 4) - a step stop disc 14 and a timing wheel 15 are freely rotatably mounted. The step stop disc 14 is with a integrally formed, radially projecting arm 16, which at the end merges into a hook 17 (FIG. 3), on which a tension spring 18 engages, the other end being anchored in place at 19 on a holding part of the work plate 2. Subsequent to the arm 16, a smooth circumferential region 20 is present on the step stop disc 14, which is curved in a circular shape and whose radius is larger than the radius of the switching toothing 11 of the program switching wheel 10, as well as a switching toothing 21 of the timing wheel 15 The predetermined central angle extending smooth circumferential region 20 is delimited by a wedge-shaped recess 22, which is followed by a single tooth 23, which ends at a slightly smaller diameter radially on the outside than corresponds to the outer diameter of the toothing 21 of the timing wheel 15. A small latching depression 24 then follows on the individual tooth 23 in the manner shown in FIGS. 1, 2.

Die Schrittstopscheibe 14 trägt außerdem einen etwa L-förmig ausgebildeten Anschlagarm 25, welcher gegenüber dem Arm 16 um etwa 120° versetzt radial vorragend an der Schrittstopscheibe 14 derart angeordnet ist, daß der eigentliche Anschlagschenkel 26 des Anschlagarmes 25 sich im wesentlichen parallel zu der Achse 7 erstreckt.The step stop disk 14 also carries an approximately L-shaped stop arm 25, which is offset from the arm 16 by approximately 120 ° and protrudes radially on the step stop disk 14 such that the actual stop leg 26 of the stop arm 25 is essentially parallel to the axis 7 extends.

Mit der Schaltverzahnung 21 des zeitgebenden Rades 15, der Schrittstopscheibe 14 und der Schaltverzahnung 11 des Programm- Schaltrades 10 wirkt eine Schaltklinke 27 eines Klinkenschaltwerkes zusammen, das in einem Gehäuse 280 untergebracht ist, welches seinerseits zwischen den beiden Werkplatten 1, 2 gehaltert ist. Die Schaltklinke 27 ist endseitig auf einem Exzenter 28 (Figur 3) drehbar gelagert, der über einen in dem Gehäuse 280 untergebrachten Getrieberäderzug von einem auf das Gehäuse 280 aufgesetzten Synchronmotor 30 in Umdrehung versetzt wird. Zu diesem Zwecke ist der Synchronmotor 30 mit einem Antriebsritzel 31 versehen, das mit einem Zahnrad des Getrieberäderzuges 29 kämmt. An der Schaltklinke 27 greift eine endseitig in dem Gehäuse 280 verankerte Zugfeder 33 an, deren Aufgabe darin besteht, die Schaltklinke 27 elastisch in Eingriff mit der Schaltverzahnung 11 des Programm-Schaltrades 10 bzw. der Schaltverzahnung 21 des zeitgebenden Rades 15 zu halten.With the switching toothing 21 of the timing wheel 15, the step stop disc 14 and the switching toothing 11 of the program switching wheel 10, a pawl 27 of a pawl switching mechanism interacts, which is accommodated in a housing 280, which in turn is held between the two work plates 1, 2. The pawl 27 is rotatably supported at the end on an eccentric 28 (FIG. 3) which is rotated by a synchronous motor 30 placed on the housing 280 via a gearwheel train accommodated in the housing 280. For this purpose, the synchronous motor 30 is provided with a drive pinion 31 which meshes with a gear of the gear train 29. On the pawl 27 engages an end anchored in the housing 280 tension spring 33, the task of which is to hold the pawl 27 elastically in engagement with the gear teeth 11 of the program gear wheel 10 or the gear teeth 21 of the timing wheel 15.

Der Schaltverzahnung 11 des Programm- Schaltrades 10 ist eine Rastklinke 34 zugeordnet, die auf einem der Abstandsbolzen 3 schwenkbar gelagert ist und deren Klinkenarm 35 durch eine endseitig an der Werkplatte 1 verankerte Zugfeder 36 elastisch in Eingriff mit der Scilaltverzahnung 11 gehalten ist. In ähnlicher Weise wirkt mit der Schaltverzahnung 21 des zeitgebenden Rades 15 eine an einer ortsfesten Achse 37 schwenkbar gelagerte Rastklinke 38 zusammen, welche mit einem Federarm 39 verbunden ist, der endseitig ortsfest abgestützt sie elastisch in Eingriff mit der Schattverzahnung 21 hält, wie dies bei Klinkenschaltwerken üblich ist.The switching toothing 11 of the program ratchet wheel 10 is assigned a latching pawl 34 which is pivotably mounted on one of the spacer bolts 3 and whose pawl arm 35 is held elastically in engagement with the Sci l old toothing 11 by a tension spring 36 anchored on the end of the work plate 1. In a similar way, with the gear teeth 21 of the timing wheel 15, a pawl 38 pivotally mounted on a fixed axis 37 interacts, which is connected to a spring arm 39, which is supported at the end and supports it elastically in engagement with the gear teeth 21, as is the case with ratchet derailleurs is common.

Der Durchmesser des zeitgebenden Rades 15 ist etwas größer als jener des Programm- Schaltrades 10, so daß die Schaltklinke 27 normalerweise lediglich mit der Schaltverzahnung 21 des zeitgebenden Rades 15 in Eingriff steht und dieses weiterschalten kann. In der Schaltverzahnung des zeitgebenden Rades 15 sind aber beispielsweise vier keilförmige Vertiefungen 40 ausgebildet, die am Umfang des zeitgebenden Rades 15 in gleichen Abständen Angeordnet sind, was bedeutet, daß zwischen benachbarten Vertiefungen 40 jeweils die gleiche Zähnezahl der Schaltverzahnung 21 liegt. Die Vertiefungen 40 ragen bis in die Schaltverzahnung 11 des Programm-Schaltrades 10, so daß, wenna die Schaltklinke 27 in eine Vertiefung 40 einfällt, sie gleichzeitig in die Schaltverzahnung 11 des Programm-Schaltrades 10 eingreift und dieses bei ihrer Vorschubbewegung um einen Schaltschritt weiterschalten kann.The diameter of the timing wheel 15 is slightly larger than that of the program ratchet 10, so that the pawl 27 is normally only engaged with the gear teeth 21 of the timing wheel 15 and this can advance. In the switching teeth of the timing wheel 15, however, four wedge-shaped recesses 40 are formed, for example, which are arranged on the circumference of the timing wheel 15 at equal intervals, which means that the same number of teeth of the switching teeth 21 lies between adjacent recesses 40. The depressions 40 protrude into the switching toothing 11 of the program switching wheel 10, so that when the pawl 27 engages in a recess 40, it simultaneously engages in the switching toothing 11 of the program switching wheel 10 and can advance it by one switching step during its advancing movement .

Dieses Einfallen der Schaltklinke 27 in eine Vertiefung 40 wird von der Schrittstopscheibe 14 nicht behindert, weil die Schaltklinke 27 gleichzeitig in der Vertiefung 22 der Schrittstopscheibe 14 liegt und diese bei ihrer Transportbewegung um die Achse der Nabe 12 hin- und hergehend um einen dem Klinkenhub entsprechenden Winkelwert frei verdrehen kann.This engagement of the pawl 27 in a recess 40 is not hindered by the step stop disc 14 because the pawl 27 is simultaneously in the recess 22 of the step stop disc 14 and this in its transport movement around the axis of the hub 12 back and forth by a corresponding to the pawl stroke Can freely rotate the angle value.

Wenn somit der Synchronmotor 30 über den Getrieberäderzug 29 den Exzenter 28 antreibt und damit die Schaltklinke 27 ihre hin- und hergehende Transportbewegung ausführt, erteilt sie dem zeitgebenden Rad eine gleichmäßige Schrittbewegung, die wegen des größeren Durchmessers der Schaltverzahnung 21 lediglich dann von einer entsprechenden Schrittbewegung des Programm-Schaltrades 10 begleitet ist, wenn die Schaltklinke 27 in eine Vertiefung 40 einfällt, und somit die Vertiefung 40 mit einer entsprechenden Zahnlücke der Schaltverzahnung 11 synchronisiert ist.Thus, if the synchronous motor 30 drives the eccentric 28 via the gearwheel train 29 and thus the pawl 27 executes its reciprocating transport movement, it gives the timing wheel a smooth step movement, which due to the larger diameter of the switching toothing 21 then only from a corresponding step movement of the Program switching wheel 10 is accompanied when the pawl 27 engages in a recess 40, and thus the recess 40 is synchronized with a corresponding tooth gap of the switching teeth 11.

Nimmt ein Transporthub, wie er der Schaltklinke 27 von dem Synchronmotor 30 erteilt wird, beispielsweise fünf Sekunden in Anspruch, so werden das Programm- Schaltrad 10 und damit die Programmnockenwalze 5 um einem Schaltschritt immer erst in Zeitabschnitten weitergeschaltet, die gegeben sind durch das Produkt der Zeitdauer eines Schalthubes der Schaltklinke 27 mal der Zahl der zwischen zwei benachbarten Vertiefungen 40 des zeitgebenden Rades 15 liegenden Zähne der Schaltverzahnung 21. Bei beispielsweise 15 zwischen zwei Vertiefungen 40 liegenden Zähnen erfolgt das Weiterschalten der Nockenwalze 5 somit bei dem angeführten Beispiel in 5 x 15=75 Sek..If a transport stroke, as given to the pawl 27 by the synchronous motor 30, takes five seconds, for example, the program switching wheel 10 and thus the program cam roller 5 are only switched by one switching step in periods of time that are given by the product of Duration of a switching stroke of the pawl 27 times the number of teeth of the gear teeth 21 lying between two adjacent recesses 40 of the timing wheel 15. For example, with 15 teeth lying between two recesses 40, the cam roller 5 is thus advanced in the example given in 5 x 15 = 75 sec.

Die Nockenbahnen 6 der Nockenwalze 5 werden von Nockentastern 41 einzelner Kontaktsysteme 42 abgetastet, welche satzweise in zwei Kontaktträgern 43 nebeneinander liegend angeordnet sind. Die Kontaktträger 43 sind in der aus Figur 1 ersichtlichen Weise im Bereiche der Oberseite und der Unterseite des Programmschaltwerkes mit den Werkplatten 1, 2 starr verklemmt, wozu an den Kontaktträgern 43 angeformte Zapfen 44 in entsprechende Löcher 45 der Werkplatten 1, 2 eingreifen. Die Kontaktträger 43 sind im übrigen durch Deckplatten 46 nach außen zu abgedeckt; die elektrischen Anschlüsse der Kontaktsysteme 42 sind bei 47 veranschaulicht.The cam tracks 6 of the cam roller 5 are scanned by cam buttons 41 of individual contact systems 42, which are arranged in sets lying side by side in two contact carriers 43. The contact carriers 43 are rigidly clamped in the manner shown in FIG. 1 in the areas of the top and the bottom of the program switching mechanism with the work plates 1, 2, for which purpose pins 44 formed on the contact carriers 43 engage in corresponding holes 45 in the work plates 1, 2. The contact carriers 43 are otherwise covered by cover plates 46 to the outside; the electrical connections of the contact systems 42 are illustrated at 47.

Auf einem Nabenteil 48 der Nockenwalze 5 ist ein als Wendering bezeichneter Zahnring 49 frei drehbar aufgesetzt, der mit einem Zahnrad 500 (Figur 3) des Getrieberäderzuges 29 in Eingriff steht und ein Wendezahnrad 50 antreibt, welches mit einer Wendenockentrommel 51 drehfest gekuppelt ist, die seitlich neben der Nockenwalze 5 liegend mittels einer zugeordneten Achse 52 in den Werkplatten 1, 2 drehbar gelagert ist. Die Wendenokkenwalze 51 trägt Wendenockenbahnen 54, welche von zwischen den Werkplatten 1, 2 schwenkbar gelagerten, zweiarmigen Nockenhebeln 55 abgetastet werden, die ihrerseits zugeordnete Kontaktsysteme 42 in dem unteren Kontaktträger 43 betätigen. Die Wendennockenwalze 51 dient dazu, beispielsweise bei Waschmaschinen die für den Waschvorgang erforderliche Umsteurerung der Waschtrommel zu bewirken.On a hub part 48 of the cam roller 5, a toothed ring 49, referred to as a turning ring, is freely rotatable, which meshes with a gearwheel 500 (FIG. 3) of the gearwheel train 29 and drives a turning gearwheel 50, which is non-rotatably coupled to a turning cam drum 51, which laterally next to the cam roller 5 is rotatably mounted lying in the work plates 1, 2 by means of an assigned axis 52. The reversible cam roller 51 carries reversible cam tracks 54 which are scanned by two-armed cam levers 55 which are pivotably mounted between the work plates 1, 2 and which in turn actuate associated contact systems 42 in the lower contact carrier 43. The turning cam roller 51 is used, for example in washing machines, to effect the change in direction of the washing drum required for the washing process.

Grundsätzlich wäre es auch denkbar, die Wendenockenwalze 51 wegzulassen und stattdessen die Wendenockenbahnen 54 unmittelbar in Gestalt entsprechender konzentrischer Nockenbahnen auf der Nockenwalze 5 anzuordnen, wobei diese Wendenokenbahnen dann entsprechend von den Nockentastern 41 der zugeordneten Kontaktsysteme 42 abgetastet werden.In principle, it would also be conceivable to omit the turning cam roller 51 and instead to arrange the turning cam tracks 54 directly in the form of corresponding concentric cam tracks on the cam roller 5, these turning token tracks then being correspondingly scanned by the cam buttons 41 of the associated contact systems 42.

Um die durch den Abstand der Vertiefungen 40 auf der zeitgebenden Scheibe 15 vorgegebene Grund-Verweilzeit der Nockenwalze 5 in ihrer jeweiligen Stellung programmgemäß dehnen zu können, kann die Schaltklinke 27 durch die Schrittstopscheibe 14 vorübergehend unwirksam gemacht werden. Zu diesem Zwecke arbeitet die Schrittstopscheibe 14 mit vier Zeitsteuerhebeln 56, 57 zusammen, die auf einem Abstandsbolzen 3 nebeneinander liegend schwenkbar gelagert sind. Die Zeitsteuerhebel 56 sind als zweiarmige Hebel ausgebildet; ihr erster Hebelarm trägt eine Tastspitze 58, welche eine Nockenbahn 6a bzw. 6b der Nockenwalze 5 abtastet, wie dies aus Figur 4 zu ersehen ist. Alle Zeitsteuerhebel 56, 57 sind im wesentlichen L-förmig ausgebildet, wobei ihr zweiter Hebelarm endseitig eine Steuerspitze 60 aufweist. Die Anordnung ist derart getroffen, daß die Zeitsteuerhebel 56, 57 durch die Zungen einer an einem zwischen den Werkplatten 1, 2 eingefügten Gehäuse 61 endseitig verankerten Kammfeder 620 in dem Sinne elastisch vorgespannt sind, daß die Tastspitzen 58 gegen die Nockenbahnen 6a, 6b angedrückt werden. Jeweils ein Zeitsteuerhebel 56 ist mit dem ihm benachbarten Zeitsteuerhebel 57 durch einen an dem letzteren, seitlich vorstehend angeordneten Zapfen 62 gekuppelt, welcher in der beispielsweise aus Figur 3 ersichtlichen Weise an dem der Tastspitze 58 zugeordneten Hebelarm oder einer seitlichen Verlängerung 63 dieses Hebelarmes anliegt. Die Zungen der Kammfeder 620 drücken dabei auf die Arme 63, wie dies aus Figur 3 zu ersehen ist.In order to be able to extend the basic dwell time of the cam roller 5, which is predetermined by the spacing of the depressions 40 on the timing disk 15, in its respective position, the pawl 27 can be temporarily disabled by the step stop disk 14. For this purpose, the step stop disk 14 works together with four timing levers 56, 57, which are pivotably mounted on a spacer 3 lying next to one another. The timing control levers 56 are designed as two-armed levers; its first lever arm carries a probe tip 58 which scans a cam track 6a or 6b of the cam roller 5, as can be seen from FIG. All timing levers 56, 57 are essentially L-shaped, their second lever arm having a control tip 60 at the end. The arrangement is such that the timing control levers 56, 57 are elastically biased by the tongues of a comb spring 620 anchored on the end of a housing 61 inserted between the work plates 1, 2 in the sense that the probe tips 58 are pressed against the cam tracks 6a, 6b . In each case one timing control lever 56 is coupled to the timing control lever 57 adjacent to it by a pin 62 on the latter, which is arranged laterally above and which, in the manner shown in FIG. 3, for example, rests on the lever arm assigned to the probe tip 58 or on a lateral extension 63 of this lever arm. The tongues of the comb spring 620 press on the arms 63, as can be seen from FIG. 3.

Seitlich neben den Zeitsteuerhebeln 56, 57 ist auf einer Achse 650 zwischen den beiden Werkplatten 1, 2 ein Zeitschaltrad 65 drehbar gelagert, das eine Klinkenverzahnung 66 aufweist, welche mit einer auf dem zugeordneten Abstandsbolzen 3 schwenkbar gelagerten Rastklinke zusammenwirkt. Die Rastklinke 67 ist durch eine Schlingfeder 68 (Figur 1) elastisch in Eingriff mit der Rastverzahnung 66 des Zeitschaltrades 65 gehalten; sie weist einen zweiten Hebelarm 69 auf, welcher gegenüber dem mit der Rastverzahnung 66 in Eingriff stehenden Hebelarm um etwa 120° versetzt ist, und endseitig mit einer Tastspitze 70 ausgebildet ist, welche in der beispielsweise aus Figur 3 ersichtlichen Weise in die Schaltverzahnung 11 des Programm-Schaltrades 10 eingreift.To the side of the timing control levers 56, 57, a timing gear 65 is rotatably mounted on an axis 650 between the two work plates 1, 2, which has a ratchet toothing 66 which cooperates with a latching pawl pivotably mounted on the associated spacer bolt 3. The latching pawl 67 is held elastically in engagement with the latching toothing 66 of the timing gear 65 by a wrap spring 68 (FIG. 1); it has a second lever arm 69, which is offset by approximately 120 ° with respect to the lever arm which engages with the locking toothing 66, and is formed at the end with a probe tip 70, which can be seen in the gear teeth 11 of the program in the manner shown in FIG. 3, for example -Shifting wheels 10 engages.

Das Zeitschaltrad 65 trägt einen koaxialen, drehfest mit ihm verbundenen Zeitschaltnocken 72, der von den Steuerspitzen 60 der Zeitsteuerhebel 56, 57 abgetastet wird. Der Zeitschaltnocken 72 weist vier nebeneinander liegende Nockenbahnen auf, die eine in Figur 2 bei 73 sichtbare gemeinsame Abfallkante haben und deren Auflaufkanten, von denen eine bei 74 angedeutet ist, gegeneinander versetzt sind, derart, daß bei einer Drehung des Zeitschaltnockens 72 die Zeitsteuerhebel 56, 57 zu unterschiedlichen Zeitpunkten verschwenkt werden, wie dies im einzelnen noch erläutert werden wird.The timing wheel 65 carries a coaxial timing cam 72 which is connected to it in a rotationally fixed manner and which is scanned by the control tips 60 of the timing control levers 56, 57. The timer cam 72 has four side-by-side cam tracks, which have a common falling edge visible at 73 in FIG. 2 and whose leading edges, one of which is indicated at 74, are offset from one another such that when the timer cam 72 rotates, the timing levers 56, 57 can be pivoted at different times, as will be explained in more detail below.

Auf eine Nabe 75 des Zeitschaltrades 65 ist eine Schlingfeder 76 aufgesetzt, die als Rückholfeder wirkt und einseitig an einem Vorsprung 77 des Zeitschaltrades 65 verankert ist, während sie auf ihrer anderen Seite an einem Fortsatz 78 der Werkplatte 2 abgestützt ist.On a hub 75 of the timing wheel 65, a wrap spring 76 is placed, which acts as a return spring and is anchored on one side to a projection 77 of the timing wheel 65, while it is supported on its other side on an extension 78 of the work plate 2.

Der schrittweise Antrieb des Zeitschaltrades 65 geschieht durch einen drehfest mit dem Wendezahnrad 50 verbundenen Radialnocken 79, der in die Rastverzahnung 66 des Zeitschaltrades 65 eingreift, derart, daß bei einer Umdrehung des Wendezahnrades 50 das Zeitschaltrad 65 um einen Schritt weitergeschaltet wird.The gradual drive of the timing wheel 65 is done by a rotationally fixedly connected to the turning gear 50 radial cam 79, which engages in the locking teeth 66 of the timing gear 65, such that the timing gear 65 is switched by one step when the turning gear 50 is rotated.

Die Wirkungsweise des insoweit beschriebenen Programmschaltwerkes ergibt sich insbesondere aus den Figuren 3 bis 7 : Wenn die von den Tastspitzen 58 der Zeitschalthebel 56 abjetasteten Nockenbahnen 6a, 6b keine Vertiefungen aufweisen, sind die Zeitsteuerhebel 56 in der aus Figur 3 ersichtlichen Weise um das weitmöglichste Maß im Gegenuhrzeigersinn verschwenkt. Gleiches gilt auch für die sich über die Zapfen 62 gegen die Zeitsteuerhebel 56 abstützenden Zeitsteuerhebel 57. In dieser Stellung sind die Steuerspitzen 60 der Zeitsteuerhebel 56, 57 von den Nockenbahnen des Zeitschaltnockens 72 abgehoben, so daß dieser ohne Einfluß ist. Ein endseitig an den Zeitsteuerhebel 56, 57 jeweils ausgebildeter Anschlagteil 80 bzw. 81 ist bezüglich der Achse 7 der Nockenwalze 5 soweit radial nach außen verschwenkt, daß die Anschlagteile 80, 81 außerhalb des Bewegungsweges des Anschlagschenkels 26 des Zeitsteuerhebels 14 liegen. Der Synchronmotor 30 treibt in bereits beschriebener Weise über den Exzenter 28 die Schaltklinke 27 an, die in der Vertiefung 22 der Schrittstopscheibe 14 liegend mit der Schaltverzahnung 21 des zeitgebenden Rades 15 in Eingriff steht und dieses schrittweise weiterschaltet, wobei die Schrittstopscheibe 14 gegen die elastische Wirkung der Zugfeder 18 eine hin- und hergehende oszillierende Bewegung um ihre Drehachse ausführt. Sowie eine Vertiefung 40 des zeitgebenden Rades 15 zu der Schaltklinke 27 kommt und diese mit ihrer Tastspitze in die Vertiefung 40 einfällt, wird die Schaltklinke 27 mit der Schaltverzahnung 11 des Programm- Schaltrades 10 gekuppelt, womit die bis dahin stillstehende Nockenwalze 5 um einen Schaltschritt weitergedreht wird, was in den Kontaktsystemen 42 entsprechende Schaltvorgänge auslöst.The mode of operation of the program switching mechanism described so far results in particular from FIGS. 3 to 7: If the cam tracks 6a, 6b, which are scanned by the probe tips 58 of the timing switching levers 56, have no depressions, the timing control levers 56 can be seen in FIG Swiveled counter-clockwise as far as possible. The same also applies to the timing levers 57 which are supported by the pins 62 against the timing levers 56. In this position, the control tips 60 of the timing levers 56, 57 are lifted off the cam tracks of the timing cam 72, so that the timing cam 72 has no influence. One end part of the timing control lever 56, 57 each formed stop part 80 or 81 is pivoted radially outward with respect to the axis 7 of the cam roller 5 so that the stop parts 80, 81 lie outside the path of movement of the stop leg 26 of the time control lever 14. The synchronous motor 30 drives in the manner already described, via the eccentric 28, the pawl 27, which lies in the recess 22 of the step stop disc 14 and engages with the switching toothing 21 of the timing wheel 15 and advances it step by step, the step stop disc 14 countering the elastic action the tension spring 18 executes a reciprocating oscillating movement about its axis of rotation. As soon as a recess 40 of the timing wheel 15 comes to the switching pawl 27 and this engages with the probe tip in the recess 40, the switching pawl 27 is coupled to the switching teeth 11 of the program switching wheel 10, with which the cam roller 5, which had been stationary until then, is rotated further by one switching step becomes what triggers corresponding switching processes in the contact systems 42.

Bei dieser Schaltbewegung des Programm- Schaltrades 10 word die mit ihrer Tastspitze 70 in die Schaltverzahnung 11 des Programm- Schaltrades 10 eingreifende Rastklinke 67 des Zeitschaltrades 65, bezogen auf Figur 3, im Uhrzeigersinn verschwenkt, womit sie aus der Rastverzahnung 66 des Zeitschaltrades 65 ausklinkt, und dieses durch die Schlingfeder 76 wieder in seine durch den Anschlag 78 gegebene Ruhestellung zurückgeführt werden kann.During this switching movement of the program switching wheel 10, the latching pawl 67 of the timing switching wheel 65, which engages with the probe tip 70 in the switching toothing 11 of the program switching wheel 10, is pivoted clockwise, with reference to FIG. 3, whereby it disengages from the latching toothing 66 of the timing switching wheel 65. and this can be returned by the wrap spring 76 back to its rest position given by the stop 78.

Im Verlaufe der beschriebenen Schaltbewegung der Nockenwalze 5 fällt die Tastspitze 58 des in Figur 1 beispielsweise am weitesten links liegenden Zeitsteuerhebels 56 in eine Vertiefung 82 der Nockenbahn 6a ein, womit der zugeordnete Zeitsteuerhebel 56, vergleichen mit der Stellung nach Figur 3, um einen bestimmten Betrag im Uhrzeigersinn verschwenkt wird, wie dies aus Figur 5 hervorgeht. Durch diese Verschwenkung gelangt der Anschlagteil 80 des Zeitsteuerhebels 56 in den Bewegungsweg des Anschlagschenkels 26 der Schrittstopscheibe 14, die damit gegen eine Bewegung im Gegenuhrzeigersinn drehfest verriegelt wird. Die Schaltklinke 27 kann nunmehr die Schrittstopscheibe 14 bei ihrem Vorwärtshub nicht mehr mitnehmen; sie läuft wegen der keilförmigen Gestalt ihrer Tastspitze aus der Vertiefung 22 der Schrittstopscheibe 14 aus und gelangt auf den glatten Umfangsbereich 20 der Schrittstopscheibe 14, dessen Radium größer ist als jener des zeitgebenden Rades 15, was zur Folge hat, daß die Schaltklinke 27 damit aus der Schaltverzahnung 21 des zeitgebenden Rades 15 ausgehoben ist und dieses nicht mehr weiterschalten kann.In the course of the described switching movement of the cam roller 5, the probe tip 58 of the timing control lever 56, for example, the leftmost one in FIG. 1, falls into a recess 82 in the cam track 6a, with which the associated timing control lever 56, compared to the position according to FIG is pivoted clockwise, as shown in Figure 5. As a result of this pivoting, the stop part 80 of the timing control lever 56 comes into the path of movement of the stop leg 26 of the step stop disc 14, which is thus locked against rotation in the counterclockwise direction. The pawl 27 can now no longer take the step stop disk 14 with it on its forward stroke; it runs because of the wedge-shaped shape of its probe tip from the recess 22 of the stepping plate 14 and reaches the smooth peripheral region 20 of the stepping plate 14, the radium of which is larger than that of the timing wheel 15, with the result that the pawl 27 thus moves out of the Gear teeth 21 of the timing wheel 15 is excavated and this can no longer advance.

Um zu vermeiden, daß bei dem Rückwärtshub die Tastklinke 27 mit ihrer Tastspitze in die verhältnismäßig weit radial nach innen ragende Vertiefung 22 der Schrittstopscheibe 14 einfällt und damit unter Umständen auf den Spitzen der Zähne der Schaltverzahnung 21 des zeitgebenden Rades 15 entlang kratzt und diese beschädigt, ist die Anordnung derart getroffen, daß anschließend an die Vertiefung 22 in der aus Figur 1 ersichtlichen Weise der einzelne Zahn 23 angeordnet ist, an den sich eine weniger tiefreichende Vertiefung 24 anschließt. Der einzelne Zahn 23 ragt nicht ganz bis an den Außenumfang der Schaltzähne der Schaltverzahnung 21 heran. Beim Rückwärtshub der Schaltklinke wird die Schrittstopscheibe 14 etwas reibschlüssig mitgenommen, so daß die "tiefe" Vertiefung 22 durch einen Schalt-, zahn der Schaltverzahnung 21 abgedeckt und die Tastspitze der Schaltklinke 27 über den einzelnen Zahn 23 in die "niedrigere" Vertiefung 24 geleitet wird, in der sie in sicherem Abstand zu der Schaltverzahnung 21 steht. Beim Vorwärtshub der Schaltklinke 27 wird diese sodann in der umgekehrten Weise wieder auf den glatten Umfangsbereich 20 geleitet.In order to prevent the pawl 27 from falling into the relatively far radially inward recess 22 of the stepping stop disc 14 during the reverse stroke and thus possibly scratching and damaging the tips of the teeth of the switching toothing 21 of the timing wheel 15 and damaging them. the arrangement is such that the individual tooth 23, which is followed by a less deep recess 24, is arranged after the recess 22 in the manner shown in FIG. The individual tooth 23 does not extend all the way to the outer circumference of the shift teeth of the shift toothing 21. During the reverse stroke of the pawl, the step-stop disc 14 is taken along somewhat frictionally, so that the "deep" recess 22 is covered by a switching tooth of the switching toothing 21 and the probe tip of the pawl 27 is guided via the individual tooth 23 into the "lower" recess 24 , in which it is at a safe distance from the gear teeth 21. During the forward stroke of the pawl 27, it is then directed in the opposite manner back onto the smooth peripheral region 20.

Durch die erwähnte Verschwenkung des Zeitsteuerhebels 56 wurde aber auch dessen Steuerspitze 60, bezogen auf Figur 5, nach unten bewegt, so daß sie in den Bereich der zugeordneten Nockenbahn des Zeitschaltnockens 72 gelangt, während die Steuerspitze 60 des mit diesem Zeitsteuerhebel 56 über den Zapfen 62 gekuppelten Zeitsteuerhebels 57 in der aus Figur 5 ersichtlichen Weise aus der Nockenbahn ausgehoben ist, weil sie um den entsprechenden Betrag höher liegt. Da das Zeitschaltrad 65 durch den Nocken 79 fortwährend im Uhrzeigersinn weitergedreht wird, läuft schließlich die Auflaufkante 74 der entsprechenden Nockenbahn auf die abgesenkte Steuerspitze 60 des verschwenkten Zeitsteuerhebels 56 auf, mit der Folge, daß der Zeitsteuerhebel 56 im Gegenuhrzeigersinn (Figur 5) verschwenkt wird. Durch diese Verschwenkung wird der Anschlagteil 80 des Zeitsteuerhebels 56 aus dem Bewegungsweg des Anschlaghebels 26 im Gegenuhrzeigersinn (Figur 5) herausbewegt, womit die Schrittstopscheibe 14 wieder freigegeben wird. Bei dem nächsten Transporthub der Schaltklinke 27 fällt diese mit ihrer Tastspitze wieder in die Vertiefung 22 der Schrittstopscheibe 14 ein, womit sie mit der Schaltverzahnung 21 des zeitgegenden Rades 15 gekuppelt und dieses angetrieben wird. Sowie die Schaltklinke 27 dabei in eine Vertiefung 40 des zeitgebenden Rades 15 einfällt, wird auch das Programm- Schaltrad 10 um einen Schritt weitergedreht. Bei diesem Weiterdrehen wird in bereits beschriebener Weise die Rastklinke 67 des Zeitschaltrades 65 im Uhrzeigersinne (Figur 5) verschwenkt und aus der Rastverzahnung 66 des Zeitschaltrades 65 dabei ausgeklinkt. Das Zeitschaltrad 65 wird daraufhin durch die Schlingfeder 68 wieder in die Ruhestellung zurückgedreht.Due to the mentioned pivoting of the timing lever 56, its control tip 60, based on FIG. 5, was also moved downward, so that it comes into the area of the assigned cam track of the timing cam 72, while the control tip 60 of the timing lever 56 with this pin 62 coupled timing lever 57 is lifted out of the cam track in the manner shown in FIG. 5 because it is higher by the corresponding amount. Since the timing gear 65 is continuously rotated clockwise by the cam 79, the leading edge 74 of the corresponding cam track finally runs onto the lowered control tip 60 of the pivoted timing lever 56, with the result that the timing lever 56 is pivoted counterclockwise (FIG. 5). As a result of this pivoting, the stop part 80 of the timing control lever 56 is moved out of the movement path of the stop lever 26 in a counterclockwise direction (FIG. 5), with the result that the step stop disc 14 is released again. During the next transport stroke of the switching pawl 27, it falls with its probe tip into the recess 22 of the step stop disc 14, with which it is coupled to the switching toothing 21 of the current wheel 15 and this is driven. As soon as the pawl 27 engages in a recess 40 of the timing wheel 15, the program switching wheel 10 is also rotated one step further. During this further rotation, the catch 67 of the timing wheel 65 is pivoted clockwise (FIG. 5) in the manner already described and is thereby released from the locking teeth 66 of the timing wheel 65. The timing gear 65 is then rotated back into the rest position by the wrap spring 68.

Die Nockenbahnen 6a, 6b weisen außer den Vertiefungen 82 noch Vertiefungen 83 auf, welche radial weiter zu der Achse 7 hinreichen d.h. "tiefer" sind. Die Vertiefungen 82, 83 sind selbstverständlich jeweils programmgemäß über den Umfang der Nockenbahnen 6a, 6b verteilt.In addition to the depressions 82, the cam tracks 6a, 6b also have depressions 83 which extend radially further to the axis 7, i.e. are "deeper". The recesses 82, 83 are of course each distributed according to the program over the circumference of the cam tracks 6a, 6b.

Wenn die Tastspitze 58 eines Zeitsteuerhebels 56 in eine solche "tiefe" Vertiefung 83 einfällt, wird der Zeitsteuerhebel 56 in der aus Figur 6 ersichtlichen Weise um einen größeren Betrag im Gegenuhrzeigersinne verschwenkt. Dadurch wird nun auch die Steuerspitze 60 des über den Zapfen 62 an gekoppelten zugehörigen Zeitsteuerhebels 57 soweit abgesenkt, daß sie in den Bereich der ihr zugeordneten Nockenbahn des Zeitschaltnockens 72 gelangt, während nunmehr die Anschlagteile 80, 81 beider Zeitsteuerhebel 56, 57 in den Bewegungsweg des Anschlagschenkels 26 der Schrittstopscheibe 14 in der aus Figur 6 ersichtlichen Weise eingeschwenkt werden. Die dadurch bewirkte, im Gegenuhrzeigersinn drehfeste Verriegelung der Schrittstopscheibe 14 ergibt in der bereits anhand von Figur 5 erläuterten Weise wiederum die selbsttätige Überführung der Schaltklinke 27 in die unwirksame Stellung, indem diese auf den glatten Umfangsbereich 20 der Schrittstopscheibe 14 aufläuft und somit aus der Schaltverzahnung 21 des zeitgebenden Rades 15 ausgehoben ist.When the stylus tip 58 of a timing lever 56 falls into such a "deep" recess 83, the timing lever 56 is pivoted counterclockwise by a larger amount in the manner shown in FIG. As a result, the control tip 60 of the associated timing lever 57, which is coupled via the pin 62 to, is now lowered to such an extent that it reaches the region of the cam path of the timing cam 72 assigned to it, while the stop parts 80, 81 of both timing levers 56, 57 now move into the movement path of the Stop leg 26 of the step stop plate 14 are pivoted in the manner shown in Figure 6. The resultant, anti-clockwise locking of the stepping plate 14 in the manner already explained with reference to FIG. 5 again results in the automatic transfer of the pawl 27 into the inactive position by running onto the smooth circumferential area 20 of the stepping plate 14 and thus out of the gear teeth 21 of the timing wheel 15 is excavated.

Wenn im Verlaufe der Drehbewegung des Zeitschaltrades 65 der Zeitsteuerhebel 56 mit seiner Steuerspitze 60 auf die Auftaufkante 74 seiner zugeordneten Nockenbahn aufläuft und verschwenkt wird, kann dadurch die Schrittstopscheibe 14 noch nicht entriegelt werden, weil sie noch von dem Anschlagteil 81 des Zeitsteuerhebels 57 gehalten ist. Erst wenn auch die Steuerspitze 60 dieses Zeitsteuerhebels 57 durch die dieser zugeordnete Auflaufkante 74 angehoben wird, erfolgt die Freigabe der Schrittstopscheibe 14 durch entsprechende Verschwenkung des Anschlagteils 81 im Gegenuhrzeigersinne.If in the course of the rotary movement of the timing wheel 65 the timing lever 56 with its control tip 60 runs onto the rising edge 74 of its assigned cam track and is pivoted, the step stop disk 14 cannot be unlocked because it is still held by the stop part 81 of the timing lever 57. Only when the control tip 60 of this timing control lever 57 is raised by the run-up edge 74 assigned to it, is the step stop disc 14 released by correspondingly pivoting the stop part 81 in the counterclockwise direction.

Auf diese Weise können durch entsprechende Abtastung der programmgemäß verteilten unterschiedlichen "tiefen" Vertiefungen 82, 83 in den beiden Nockenbahnen 6a, 6b vier unterschiedliche Verweilzeiten des Programm-Schaltrades 10 und damit der Nockenwalze 5 eingestellt werden. Zusammen mit der ohnehin ansteuerbaren Grund-Verweilzeit, wie sie bei unwirksamer Schrittstopscheibe 14 vorhanden ist (Figur 3), ergeben sich somit fünf unterschiedlich wahlweise zur Verfügung stehende Verweilzeiten.In this way, four different dwell times of the program switching wheel 10 and thus of the cam roller 5 can be set by appropriately scanning the different "deep" depressions 82, 83 distributed according to the program in the two cam tracks 6a, 6b. Together with the basic dwell time which can be controlled anyway, as is present when the step stop disc 14 is ineffective (FIG. 3), this results in five different dwell times which are optionally available.

In bestimmten Anwendungsfällen ist es erwünscht, eine Möglichkeit für eine kurze zusätzliche impulsartige Verweilzeit vorzusehen. Um dies zu erreichen, ist die Schaltverzahnung 11 des Programm-Schaltrades 10 mit einem längeren Zahn 90 (beispielsweise Figur 5) versehen, der derart bemessen ist, daß er über den glatten Umfangsbereich 20 der Schrittstopscheibe 14 radial vorragt. Sowie die Schaltklinke 27 im Verlaufe der Weiterschaltung der Nockenwalze 5 auf diesen verlängerten Zahn 90 trifft, wird das Programm- Schaltrad 10 unabhängig von dem zeitgebenden Rad 15 weitergeschaltet, wobei die Verweilzeit dann durch die von dem Exzenter 28 vorgegebene Hubzeit für die Schaltklinke 27 bestimmt ist.In certain applications it is desirable to provide a possibility for a short additional pulse-like dwell time. In order to achieve this, the switching toothing 11 of the program switching wheel 10 is provided with a longer tooth 90 (for example FIG. 5), which is dimensioned such that it projects radially beyond the smooth peripheral region 20 of the step stop disc 14. As soon as the pawl 27 encounters this extended tooth 90 in the course of advancing the cam roller 5, the program switching wheel 10 is switched on independently of the timing wheel 15, the dwell time then being determined by the eccentric 28 stroke time for the pawl 27 .

Inbesondere bei Schrittschaltwerken, die mit einer Schnellgangeinrichtung versehen sind, tritt gelegentlich das Bedürfnis auf, von außen. her, d.h. unabhängig von der Programmierung' des eigentlichen Programmträgers, eine von zwei Verweilzeiten auswählen zu können. Dies kann bei dem beschriebenen Programmschaltwerk in sehr einfacher Weise geschehen, indem in der in Figur 7 dargestellten Weise an der Werkplatte 2 ein Betätigungshebel 91 um eine Achse 92 schwenkbar gelagert ist, der mit einem Hebelarm 93 unter einen entsprechenden Zapfen eines oder mehrerer Zeitsteuerhebel 56 oder 57 eingreift, Wird der Betätigungshebel im Uhrzeigersinn (Figur 7) verschwenkt, so wird der entsprechende Zeitsteuerhebel aus dem Bewegungsweg des Anschlagschenkels 26 der Schrittstopscheibe 14 herausbewegt, womit die Schrittstopscheibe 14 entriegelt wird und die Nockenwalze 5 in bereits erläuterter Weise weitergeschaltet werden kann. Die Auswahl der Verweilzeit erfolgt dabei mittels des Betätigungshebels 91 auf rein mechanischem Wege, was bedeutet, daß die sonst häufig erforderlichen elektromechanischen Übertragungseinrichtungen u.dgl. entfallen.In particular with step-by-step mechanisms that are provided with an overdrive device, the need occasionally arises from the outside. forth, i.e. independent of the programming of the actual program carrier, to be able to choose one of two dwell times In the program switching mechanism described, this can be done in a very simple manner in that, in the manner shown in FIG. 7, an actuating lever 91 is pivotably mounted on the work plate 2 about an axis 92, which lever arm 93 has a corresponding pin of one or more timing lever 56 or 57 engages, If the actuating lever is pivoted clockwise (Figure 7), the corresponding timing lever is moved out of the path of movement of the stop leg 26 of the step stop disc 14, whereby the step stop disc 14 is unlocked and the cam roller 5 can be switched on in the manner already explained. The selection of the dwell time takes place by means of the actuating lever 91 in a purely mechanical way, which means that the otherwise frequently required electromechanical transmission devices and the like. omitted.

Beispielsweise im Programmablauf einer Waschmaschine treten neben zeitabhängigen auch zustandsabhängige Vorgänge auf, beispielsweise muß das Waschwasser bis auf eine bestimmte Temperatur aufgeheizt werden. Bevor diese Temperatur erreicht ist, kann das zeitabhängige Programm nicht weiterlaufen. Diese zustandsabhängige Steuerung der Verweilzeit des Programmträgers, d.h. der Nockenwalze 5, kann in sehr einfacher Weise dadurch geschehen, daß die Schrittstopscheibe 14 zustandsabhängig verriegelt wird. Zu diesem Zwecke ist beispielsweise zwischen den Werkplatten 1, 2 eine von einem nicht dargestellten Temperaturfühler betätigter Zugmagnet 94 angeordnet, dessen Anker 95 über einen Hebel 96 eine auf die Achse 7 drehbar aufgesetzte Büchse 97 verschwenken kann, auf welcher die Programmtrommel 5 frei drehbar gelagert ist und die sich bis zu einem zwischen der Schrittstopscheibe 14 und dem zeitgebenden Rad 15 angeordneten, drehfest mit ihr verbundenen Betätigungsarm 98 erstreckt, der radial nach außen weisend, mit dem Anschlagschenkel 26 zusammenwirken kann. Der Betätigungsarm 98 liegt normalerweise in dem Winkelbereich zwischen dem Arm 16 und dem Anschlagarm 25. Wird der Betätigungsarm 98 durch den Zugmagneten 94 entgegen der Wirkung einer an einem Hebelarm 100 der Büchse 97 angreifenden Rückstellfeder 99 verschwenkt, so gelangt er in den Bereich der hin-und hergehenden Bewegung des Anschlagarmes 25, der damit blockiert wird, womit eine Weiterschaltung des Programmträgers 5, ausgeschlossen ist.For example, in the program sequence of a washing machine, in addition to time-dependent, also state-dependent processes occur, for example the washing water must be heated up to a certain temperature. The time-dependent program cannot continue until this temperature is reached. This state-dependent control of the dwell time of the program carrier, ie the cam roller 5, can be done in a very simple manner by locking the step stop disc 14 depending on the state. For this purpose, a pull magnet 94, actuated by a temperature sensor, not shown, is arranged between the work plates 1, 2, the armature 95 of which can pivot, via a lever 96, a sleeve 97 rotatably mounted on the axis 7, on which the program drum 5 is freely rotatably mounted and that to one between the crotch stopper 14 and the timing Wheel 15 arranged, rotatably connected to it actuating arm 98 extends, which can cooperate with the stop leg 26 pointing radially outward. The actuating arm 98 is normally in the angular range between the arm 16 and the stop arm 25. If the actuating arm 98 is pivoted by the pull magnet 94 against the action of a return spring 99 acting on a lever arm 100 of the bush 97, it reaches the region of the and going movement of the stop arm 25, which is thus blocked, whereby a further switching of the program carrier 5 is excluded.

Sowie der Zugmagnet 94 den Betätigungsarm 98 wieder freigibt, kann die Schrittstopscheibe 14 in bereits erläuterter Weise wieder ihre normale Funktion übernehmen.As soon as the pull magnet 94 releases the actuating arm 98 again, the step stop disk 14 can again assume its normal function in the manner already explained.

Bei dem beschriebenen Ausführungsbeispiel sind die Zeitsteuerhebel 56, 57 durch die Nockenbahnen des Zeitschaltnockens 72 betätigbar, der Seinerseits durch das Zeitschaltrad 65 angetrieben wird. In Fällen, in denen nicht vier unterschiedliche Verweilzeiten erforderlich sind, sondern mit zwei das Auslagen gefunden wird, kann die Anordnung auch derart getroffen sein, daß ein Zeitsteuerhebel unmittelbar das Zeitschaltrad 15 abtastet, wobei die Dauer der (neben der Grundverweilzeit) einstellbaren Verweilzeiten von der Zahl der auf dem Zeitschaltrad 15 angeordneten entsprechenden Steuervetiefungen abhängt.In the exemplary embodiment described, the timing control levers 56, 57 can be actuated by the cam tracks of the timing switching cam 72, which in turn is driven by the timing gear 65. In cases where four different dwell times are not required, but two are found, the arrangement can also be such that a timing lever immediately scans the timing wheel 15, the duration of the dwell times that can be set (in addition to the basic dwell time) Number of corresponding control wells arranged on the timing wheel 15 depends.

Claims (17)

1. Programmed switching mechanism for washing machines, dishwashers and the like, having a rotatably mounted program carrier (5) arranged to actuate switching contacts, and a program indexing wheel (10) rigidly connected to the program carrier for rotation with it and carrying indexing ratchet teeth (11), which indexing wheel can be advanced by means of the indexing pawl (27) of an electric motor- driven pawl/ratchet indexing mechanism, such advancement of the wheel (10) being in steps with programmable dwell periods; wherefor at least one time control lever (56) is provided which scans, by means of a scanning tip (58), cams (6) present on the program carrier, said time control lever controlling the indexing movement of the pawl (27); characterized in that the time control lever (56) is fixedly mounted and scans independently programmed cam tracks (6a, 6b), and an indexing-inhibiting disc (14) is arranged to be intermediate in the drive between the indexing pawl (27) and the time controlling lever (56), by which disc (14) the pawl (27) is brought into an inhibited condition in response to the time control lever (56); and in that the time control lever can be actuated by a timer switch (50, 65, 72) to release the pawl (27) from its inhibited condition for its automatic coming into engagement with the program indexing wheel (10), such actuation being arranged to occur after elapse of a dwell period of programmable duration.
2. Programmed switching mechanism according to Claim 1 characterized in that, concentrically with the program indexing wheel (10), there is mounted a time-signalling wheel (15) so as to be independently rotatable, which has its own indexing ratchet toothing (21) cooperative with the indexing pawl (27) wherein the diameter of this ratchet toothing (21) has a greater diameter than that of the indexing wheel (10) but has an indentation (40) reaching inwards as far as and into the indexing ratchet teeth (11) of the indexing wheel (10), and in that the indexing pawl (27) becomes coupled with the indexing ratchet teeth (11) of the indexing wheel (10) whenever it is in the condition of merely having dropped into said indentation (40).
3. Programmed switching mechanism according to Claim 2, characterized in that the time-signalling wheel (15) comprises several such indentations (4), which are spaced uniformly around its periphery.
4. Programmed switching mechanism according to any one of the preceding claims, characterized in that the indexing inhibiting disc (14) is mounted to be concentric with the program indexing wheel (10) and rotatable within limits, and has a smooth peripheral inhibiting portion (20) of radius greater than that of the program indexing wheel (10) which inhibiting peripheral portion (20) terminates at a (further) indentation (22), said indentation (22) extending inwards as far as said ratchet teeth (11 or 21) of one of the neighbouring wheels (10 or 15) that can be indexed by the pawl (27), and in that the pawl (27) becomes coupled to the ratchet toothing of said one neighbouring wheel merely by its falling into the last-mentioned indentation (22)..
5. Programmed switching mechanism according to Claim 2 or 4 characterized in that the radius of the smooth peripheral portion (20) of the indexing-inhibiting disc (14) is greater than the radius of the time-signalling wheel (15) and in that the recess (22) of the inhibiting disc (14) reaches as far as and into the peripheral ratchet teeth (11) of the program indexing wheel (10).
6. Programmed switching mechanism according to Claim 4 characterized in that arranged next to the indentation (22) of the indexing-inhibiting disc (14) is a single tooth (23), and arranged next thereto is a further indentation (24), of which the bottom lies outside the toothing (21) of said neighbouring wheel (15).
7. Programmed switching mechanism according to any one of Claims 4 to 6 characterized in that the index-inhibit wheel (14) carries a stop (26) by which the inhibit wheel (14) can be blocked for rotation in one of its rotational directions by pivoting of the time control level (56) into the path of movement of the stop (26) and in that, when the index-inhibit disc (14) is thus blocked for rotation, the indexing pawl (27) will rest upon the smooth peripheral portion (20) of the inhibit disc (14).
8. Programmed switching mechanism according to Claim 7 characterized in that the index-inhibit disc (14) is elastically prestressed in the rotational direction corresponding to opposing the abutment pressure of the stop (26) against the pivot time control lever (56).
9. Programmed switching mechanism according to any one of the preceding claims, characterized in that the time control lever (56) is designed as a double-armed lever pivotably mounted alongside the program carrier (5), wherein one of the arms of the lever provides the scanning tip (58) for the cam tracks (6a, 6b) and the other of the arms of the lever scans a cam track (72) around a driven time-switching wheel (65) of the time switch.
10. Programmed switching mechanism according to Claim 2 or Claim 9 characterized in that the time switching wheel is provided by said time-signalling wheel (15) which is formed with recesses constituting the last mentioned cam track.
11. Programmed switching mechanism according to Claim 9 characterized in that the timer switching wheel (65) is driven in uniform steps by an indexing mechanism (50, 79, 67).
12. Programmed switching mechanism according to Claim 11 characterized in that the timer switch wheel (65) is prestressed in one rotational direction by a return spring (76) and in that a detent pawl (67) is arranged with the timer switch wheel (65), under control of the program-indexing wheel (10), so that on an indexing movement of the indexing wheel (10) the detent pawl (67) releases the timer switch wheel (65), which when released is returned by the return spring (76) to a starting position defined by a stop (78).
13. Programmed switching mechanism according to any of Claims 9 to 12 characterized in that it comprises at least two time control levers (56, 57) controlled from one cam track (6a, 6b) of the program carrier, which levers are pivotably mounted alongside one another, are arranged with two neighbouring cam tracks of said timer switch wheel (65), and are coupled with each other for one pivotal direction, of which levers only one (56) has a scanning tip cooperating with one respective cam track (6a or 6b) of the program carrier (5), and both (56 and 57) can be brought into engagement with their cam tracks of the timer switch wheel (65) as a result of different magnitudes of pivotal motion of the levers (56, 57).
14. Programmed switching mechanism according to any one preceding claim, characterized in that the ratchet toothing (11) of the program indexing wheel (10) comprises at least one extended tooth (90) projecting into the field of motion of the indexing pawl (27) and holding it in an inoperable position.
15. Programmed switching mechanism according to any one of Claims 4 to 14 characterized in that at least one of said time control levers (56, 57) is coupled to an actuating member (91) which can be actuated at will to drive this lever into a position releasing the indexing-inhibiting disc (14).
16. Programmed switching mechanism according to any one of Claims 4 to 15 characterized in that the index-inhibiting disc (14) can be brought into engagement with an actuating means (98) actuable at will, whereby the disc (14) can be locked at a position in which the indexing pawl (27) is held sliding on the smooth peripheral region (20) of the indexing-inhibit disc (14).
17. Programmed switching mechanism according to any one of the preceding claims, characterized in that the timer switch (65, 72) is coupled with a continuously driven reversing control mechanism (49, 50, 54).
EP19790100438 1978-02-15 1979-02-14 Programmed switching device for washing machines, dish-washing machines and the like. Expired EP0003615B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19782806258 DE2806258A1 (en) 1978-02-15 1978-02-15 PROGRAM CONTROL UNIT FOR WASHING MACHINES, DISHWASHING MACHINES, ETC.
DE2806258 1978-02-15

Publications (3)

Publication Number Publication Date
EP0003615A1 EP0003615A1 (en) 1979-08-22
EP0003615B1 true EP0003615B1 (en) 1981-12-23
EP0003615B2 EP0003615B2 (en) 1987-02-25

Family

ID=6031957

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19790100438 Expired EP0003615B2 (en) 1978-02-15 1979-02-14 Programmed switching device for washing machines, dish-washing machines and the like.

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EP (1) EP0003615B2 (en)
AU (1) AU527960B2 (en)
DE (1) DE2806258A1 (en)
ES (1) ES478082A1 (en)
YU (1) YU33679A (en)

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IT1125083B (en) * 1979-12-13 1986-05-14 Meccanoplastiche Di Precisione STEP-BY-STEP ADVANCE DEVICE FOR A PROGRAMMER WITH DIFFERENTIATED PAUSE TIMES
FR2522170B1 (en) * 1982-02-19 1986-02-07 Carpano & Pons PROGRAMMER CONTROL DEVICE
DE3304007A1 (en) * 1983-02-07 1984-08-09 Eaton Gmbh & Co Kg, 7778 Markdorf PROGRAM SWITCHGEAR WITH TIME LOCKED SWITCH, ESPECIALLY FOR WASHING MACHINES, DISHWASHER, AND THE LIKE.
DE3416865A1 (en) * 1984-05-08 1985-11-14 AKO-Werke GmbH & Co KG, 7988 Wangen Program switch unit
US4500212A (en) * 1984-07-02 1985-02-19 The Singer Company Expanded interval timer drive mechanism
FR2576119B1 (en) * 1985-01-11 1987-01-16 Carpano & Pons PROGRAMMER CONTROL DEVICE
DE3607953A1 (en) * 1986-03-11 1987-09-17 Ako Werke Gmbh & Co PROGRAM SWITCHGEAR
DE3627047A1 (en) * 1986-08-09 1988-02-11 Ako Werke Gmbh & Co Program-switch unit
FR2625232B1 (en) * 1987-12-29 1991-12-06 Crouzet Sa WASHING MACHINE PROGRAMMER
FR2630557B1 (en) * 1988-04-25 1992-02-14 Crouzet Sa PROGRAMMER FOR ELECTRODOMESTIC MACHINES
IT1238998B (en) * 1990-02-22 1993-09-17 Biasi Virgilio De PROCEDURE FOR THE PARTIALIZATION OF CYCLE TIMES IN THE PROGRAMMING DEVICES AND RELATED DEVICES
ES2028635A6 (en) * 1991-02-12 1992-07-01 Fagor S Coop Ltda Step-by-step timer switch activation system for program control devices.
ES2034919A6 (en) * 1991-08-02 1993-04-01 Fagor S Coop Ltda Step-by-step timer switch activation system for program control devices.

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FR1565107A (en) * 1968-01-19 1969-04-25
DE2040464C3 (en) * 1970-08-14 1980-05-14 Ako-Werke Gmbh & Co, 7988 Wangen Program controller for washing machines
FR2116904A5 (en) * 1970-12-09 1972-07-21 Crouzet Sa MODULAR TIMER ELEMENT FOR PROGRAMMER
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US3724248A (en) * 1971-10-07 1973-04-03 Controls Co Of America Timer
FR2279152B1 (en) * 1973-12-27 1977-01-07 PROGRAMMER

Also Published As

Publication number Publication date
AU527960B2 (en) 1983-03-31
AU4426379A (en) 1979-08-23
YU33679A (en) 1983-01-21
ES478082A1 (en) 1979-07-16
DE2806258A1 (en) 1979-08-23
DE2806258C2 (en) 1987-01-22
EP0003615B2 (en) 1987-02-25
EP0003615A1 (en) 1979-08-22

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