EP0462888B1 - Programmateur avec came de temporisation - Google Patents

Programmateur avec came de temporisation Download PDF

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Publication number
EP0462888B1
EP0462888B1 EP91401638A EP91401638A EP0462888B1 EP 0462888 B1 EP0462888 B1 EP 0462888B1 EP 91401638 A EP91401638 A EP 91401638A EP 91401638 A EP91401638 A EP 91401638A EP 0462888 B1 EP0462888 B1 EP 0462888B1
Authority
EP
European Patent Office
Prior art keywords
programmer
cam
cams
block
wheel
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP91401638A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0462888A1 (fr
Inventor
Claude Thepault
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Noalia Solutions SA
Original Assignee
Crouzet Appliance Controls SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Crouzet Appliance Controls SA filed Critical Crouzet Appliance Controls SA
Publication of EP0462888A1 publication Critical patent/EP0462888A1/fr
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Anticipated expiration legal-status Critical
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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 present invention relates to a programmer for an apparatus, or system, provided with a plurality of electrical members to be fed selectively and sequentially, a programmer comprising a plurality of cams cooperating with a plurality of contacts for supplying said members, and means for driving said cams in movement.
  • Such a programmer is used in particular in the household appliance field, for devices such as washing machines for washing clothes or dishes, for example.
  • the present invention relates to programmers intended to operate in combination with a timing device, or timer.
  • a time delay before the program runs allows the start time of the program to be controlled in advance.
  • a time delay during the course of the program allows for example, in the case of a washing machine, to soak the laundry in the machine at rest, for a period of time, between the prewash and the actual washing.
  • a time delay after the program has run is useful in machines that dry laundry after washing, to control the duration of drying.
  • French patent N. 1,595,564 proposes a programmer provided with a timing cam driven, by means of a reduction gear, by the motor which already drives the moving cams.
  • This adjustable time delay makes it possible to inhibit for a certain time a mechanical device, arranged between the engine and a block of cams, to transform the continuous movement of the engine into a stepping movement of the block of cams.
  • the timing cam thus makes it possible to delay a certain number of steps during the course of the program.
  • this known device is quite complex and bulky, and requires the use of a reduction gear comprising numerous pulleys, if one wishes to be able to set the timing to a high value, for example several hours. In this case, the setting accuracy of the short delay times is poor.
  • the present invention aims to overcome the above drawbacks.
  • a programmer for an apparatus, or system provided with a plurality of electrical members to be fed selectively and sequentially, a programmer comprising, on the one hand, a plurality of cams cooperating with a plurality of contacts d of said organs, and of the means for driving said moving cams and, on the other hand, at least one timing cam driven, by means of a reduction gear, by said drive means, programmer characterized in that said reduction gear comprises a first wheel driven in continuous rotation and provided with a pawl, a second wheel comprising said timing cam and provided with toothing, the pawl being able to assume a rest position in which it does not cooperate with the toothing and a working position in which it cooperates with the teeth, and a fixed cam whose profile controls the passage of said pawl from the rest position to the working position and vice versa.
  • means are provided for inhibiting the passage of said pawl in the working position, controlled by a cam of said plurality of cams.
  • the programmer which will now be described is more particularly intended for a washing machine and dryer.
  • an electric motor 1 here a synchronous motor, drives, by means of a reduction gear 2, here a gear train, a block 5 of fast cams, rotating around an axis 16.
  • the block 5 comprises on the one hand reversing cams, of which only one 51 is shown in the figure for the sake of simplicity, and on the other hand a wheel 52.
  • the wheel 52 is provided with a pawl 3 movable around an axis parallel to axis 16.
  • the reversing cams cooperate with contacts not shown to control the periodic change of the direction of rotation of the machine drum.
  • the pawl 3 is returned by a spring so that its active part, in this case its pointed end 31, moves away from the axis 16. It is however limited in this movement by a lever 4, movable around an axis integral with the wheel 52 and parallel to the axis 16.
  • the lever 4 comes to cooperate with the internal profile 61 of a fixed cam 6.
  • the internal profile 61 of the cam 6 is circular, except in a small area where it has an accident 15 which here consists of a recess 15 whose radius is greater than that of the circular part of the inner profile 61.
  • the lever 4 when the lever 4 cooperates with the circular part of the profile 61, it maintains the pawl 3 in a first position where its active part is relatively close to the axis 16, while when it cooperates with the accident 15, it allows the active part of the pawl 3 to pass into a second position, more away from axis 16.
  • a block 7 of slow cams is provided with an inwardly facing toothing, not visible in the figure, of a diameter such that the pawl 3 does not cooperate with this toothing when it is in the first position, or rest position, while it cooperates with it when it is in the second position, or working position.
  • Each of the cams of block 7 controls, in principle, one of the components of the machine, such as the pump, the heating resistor, and so on, by cooperating with contacts not shown.
  • a toothed pinion 9 cooperates with an external toothing of the wheel 52.
  • the pinion 9 is integral in rotation with a shaft 10, parallel to the axis 16.
  • the shaft 10 is itself integral with another toothed pinion 9 ′, Here identical to the pinion 9.
  • the pinion 9 ′ drives a wheel 52 ′ provided with an external toothing.
  • the wheel 52 ′ is here identical to the wheel 52.
  • it comprises a pawl 3 ′ and a lever 4 ′ identical to the pawl 3 and to the lever 4, respectively.
  • a fixed cam 6 ′ identical to the fixed cam 6, that is to say having an internal profile 61 ′ and an accident 15 ′, cooperates with the lever 4 ′.
  • a block of cams 11 has a toothing turned inwards identical to that of block 7, toothing also not visible in the figure, in order to cooperate with the lever 4 ′.
  • the wheel 52 ′ and the block 11 are movable in rotation around a shaft 12 integral with the cam block 7.
  • the shaft 12 is provided with a control button 17 which allows, as will be better understood below, select a specific washing program by adjusting the initial position of block 7.
  • the block 11 here comprises a cam 111 whose profile acts on an electrical contact, not shown, which controls the drying system of the machine.
  • the cam 111 is here integral with a toothed wheel 112 whose initial position is adjusted manually by means of return wheels 13 and a control button 14.
  • a finger 62 which can occupy two positions, one in which it closes the recess, or accident 15 ′, the other in which it releases it.
  • the finger 62 is integral with a shaft 63 parallel to the axis 16, and provided with a lever 64 which reads the profile of a cam 71 of the block 7.
  • the motor 1 drives in continuous rotation on the one hand the block 5 and therefore the wheel 52, and on the other hand, via the toothed wheels 9 and 9 ′ and the shaft 10, the wheel 52 ′.
  • the pawl 3 As long as the lever 4 cooperates with the circular part of the profile 61 of the fixed cam 6, the pawl 3 is in the rest position, it does not cooperate with the teeth inside of the cam block 7, and the latter remains stationary. As soon as the lever 4 encounters the accident 15, it lets the pawl 3 pass into the working position where it cooperates with the teeth of the block 7, which causes the drive of this block over an angle substantially equal to that under which is given the accident 15 from axis 16, corresponding to a step in the program. Thus, thanks to the pawl 3, to the lever 4 and to the accident 15, the wheel 52, driven in continuous rotation by the motor 1, drives the cam block 7 to make it run through a program step each time the lever 4 passes in front of the accident 15.
  • the cam block 7 advances by one program step at each revolution of the wheel 52.
  • the device comprising the wheel 52, the pawl 3, the lever 4, the cam 6 and the toothing 7, known as a "pulse device” or “step by step drive device”, is described in particular in French patent N 1,533,219 and its first addition, as well as in the French patent already cited N . 1,595,564.
  • the progress of the program is controlled by the stepwise movements of the cam block 7, while the reversing cams such as the cam 51 permanently control the invention of the direction of rotation of the motor which drives the drum.
  • the cam 71 has here a profile such that during the progress of the program by moving step by step of the block 7, the finger 62 closes the accident 15 ′.
  • the block 111 remains stationary. Indeed, and in a known manner, everything happens as if the accident 15 ′ did not exist, and the pawl 3 ′ never cooperates with the teeth of block 11.
  • a cam of block 7 controls the opening, during program sequence, of a switch arranged in series in the circuit of the drying system, which then remains at rest.
  • block 7 comes to a standstill, for example because a tooth from its internal toothing is omitted, or by any other known means.
  • the cam of the block 7 which controls the drying system controls the closing of the switch so that drying begins, and the cam 71 controls the release of the accident 15 ′, which amounts to causing the starting of the timer.
  • the stepping drive device comprising the wheel 52 ′, the pawl 3 ′, the lever 4 ′, the fixed cam 15 ′ and the teeth of the block 11 act in the manner of a reduction gear since, at each turn of the wheel 52 ′, the block 11 turns only by a reduced angle, here and for example the same as that which corresponds to a program step, corresponding for example to an angle of 6 degrees.
  • the reduction ratio introduced by the stepping drive device is therefore 60. It would take at least three pulleys to obtain such a reduction ratio with a gear reducer of the reducer type 2.
  • Drying continues for a period of time set with the button 14, until the cam 111 opens a switch arranged in series in the supply circuit of the drying system.
  • the washing + drying cycle is then finished.
  • the programmer of the invention provided with its integrated timer, practically only implements parts already used in the known programmer. This is a factor that reduces manufacturing and maintenance costs.
  • the timer itself occupies a small volume, due to the unusual use which is made of the known device for stepping.
  • Block of cams 11 could be used to introduce a delay of one or more functions of the program controlled by the block 7, by means of a device of the type of that of the finger 62, which would seal the accident 15 by response to the reading of the profile of a cam of block 11 by a lever similar to lever 64.
  • Block 11 could also be used like that of a second independent programmer of block 7.
  • the levers 4 and 4 ′ allow amplification, for the pawls 3 and 3 ′, respectively, of the displacement which would be caused by the accident 15. They are not however compulsory, in which case each accident acts directly on the corresponding pawl.
  • the adjuster 14 for the duration of the delay introduced by the timer could be integral with a shaft concentric with the shaft 12 instead of being off-center as in the drawings.
  • the programmer of the invention is particularly suitable for washing machines or dishes, it can also be used for any system comprising a plurality of members to be fed selectively and sequentially.

Landscapes

  • Main Body Construction Of Washing Machines And Laundry Dryers (AREA)
  • Transmission Devices (AREA)
  • Control Of Washing Machine And Dryer (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
  • Washing And Drying Of Tableware (AREA)
EP91401638A 1990-06-19 1991-06-18 Programmateur avec came de temporisation Expired - Lifetime EP0462888B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9007632A FR2663459B1 (fr) 1990-06-19 1990-06-19 Programmateur avec came de temporisation.
FR9007632 1990-06-19

Publications (2)

Publication Number Publication Date
EP0462888A1 EP0462888A1 (fr) 1991-12-27
EP0462888B1 true EP0462888B1 (fr) 1994-12-07

Family

ID=9397765

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91401638A Expired - Lifetime EP0462888B1 (fr) 1990-06-19 1991-06-18 Programmateur avec came de temporisation

Country Status (5)

Country Link
EP (1) EP0462888B1 (es)
DE (1) DE69105637T2 (es)
ES (1) ES2049128B1 (es)
FR (1) FR2663459B1 (es)
IT (1) IT1249920B (es)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1533219A (fr) * 1966-12-23 1968-07-19 Crouzet Sa Nouveau dispositif d'avance pas à pas applicable aux programmateurs notamment pour machines à laver
FR2116904A5 (fr) * 1970-12-09 1972-07-21 Crouzet Sa Element temporisateur modulaire pour programmateur

Also Published As

Publication number Publication date
ITTO910466A0 (it) 1991-06-19
ES2049128B1 (es) 1994-10-16
FR2663459B1 (fr) 1992-10-02
EP0462888A1 (fr) 1991-12-27
ITTO910466A1 (it) 1992-12-19
IT1249920B (it) 1995-03-30
FR2663459A1 (fr) 1991-12-20
DE69105637D1 (de) 1995-01-19
ES2049128A1 (es) 1994-04-01
DE69105637T2 (de) 1995-07-13

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