DE3119665A1 - Programming switch unit - Google Patents

Abstract

The invention relates to a programming switch unit having a cam drum which can be driven at different rotational speeds via a control switch and a driving device which can be influenced by this. At the same time, there is a preselection disc, of which the rotary-angle position relative to the cam drum can be adjusted by hand via a ratchet mechanism dependent on the direction of rotation, whilst the control switch can be actuated by a setting device of the ratchet mechanism. The setting device has a plurality of lifting pieces (13) in the form of an arc of a circle, which are held radially adjustably on the preselection disc and which are arranged in an approximately closed circle concentrically relative to a slotted ring (11) in the form of an arc of a circle and connected in one piece to the cam drum. Located on the lifting pieces (13) are radially directed lifting-out cams, each with a sloping edge, which drop into matching recesses (26) of the slotted ring (11) and which are deflected radially outwards via the sloping edges as a result of a relative displacement between the preselection disc and the cam drum (3). The control switch is thereby changed over. <IMAGE>

Description

A 42 05/12/1981

Bt / gf

AKO-Werke GrabH & Co. Pfannerstraße 75/79

7988 Wangen / Allgäu

Program switchgear

The invention relates to a program switch according to the Generic term of the first claim »

In a known program circuit of this type (DE-OS 25 12 900), a mock drum coupled to a drive device is freely rotatably mounted on a shaft. To de-drum the no-de-drum from a momentary position if necessary to be able to bring the desired starting position quickly without having to turn the cam drum by hand, a manually operable adjustment button is rigidly connected to the shaft, with the one via a direction of rotation dependent Lock a control switch can be operated, which switches the drive device to a high gear. That The locking mechanism has a preselection disk that is rigidly connected to the shaft and which is connected to one side via lifting cams beveled planks in corresponding recesses of an adjusting disc mounted axially displaceably on the shaft

Α-42 12.05el9Sl

Bt / gf

engages, = there are control recesses on the circumference of the adjusting disk, which are scanned by a switching lever of the control switch _o The cam flank following an increased cam track section in the direction of rotation drops abruptly, while the second cam flank rises at an angle »By any adjustment of the pre-selection disc to a desired starting position ■ the adjusting disc is adjusted against the force of a spring via the lifting cams axially on the shaft away from the pre-selection disc towards the cam drum until the free ends of the lifting cams stand up on the flat running surfaces of the adjusting disc«. In this position, the switching lever for the control switch is unassisted and actuates the control switch ο This switches the drive device for the mock drum to an increased speed _{Is the} adjusting disc in the axial direction towards the preselection disc? whereby the switching lever comes into engagement with the adjusting disk again and is lifted against the force of a spring by the inclined edge of the subsequent control recess i-jirdo This means that the control switch reaches its initial position again and switches the drive device back to its normal drive speed The switching lever of the switch causes a sudden acceleration via the abruptly sloping cam flank of the cam plate, which causes the contact in the control switch to close quickly when switching to the increased rotation speed. On the other hand, the lever is only lifted out via the inclined Mockenflsnke of the cam disc.

β «β«

⁰ O β

_3_ -. ... ..Μ. 3113665

Α-42 May 12, 1981

Bt / gf

gradually, so that the contact of the control switch is opened even slowly. «This has the consequence that not switching back from fast to normal drive speed with the required speed Safety occurs at precisely defined positions of the cam drum different angular positions to the normal drive speed switched back so that the program does not at. precisely defined program steps continued is »In addition, it proves to be difficult to tilt the control disc over the lifting cam in to move in the axial direction, in addition, the length of the program switching mechanism to the axial displacement the adjusting disc must be extended *

The invention is based on the object of a program switching mechanism according to the preamble of the first claim to take measures through which the aforementioned disadvantages can be avoided and with a simple structure a switch back to the normal drive speed in exactly defined Itfinkellagen the cam drum takes place.

This object is achieved according to the invention by the characterizing features of the first claim.

Due to the configuration according to the invention, the steep drive speed is used for switching off the increased drive speed Decline of the cam flank on the cam disc exploited, so that due to the action on the shift lever Reset force an instantaneous reset of the control switch takes place. Since the abrupt drop in the cam

GO _oo η λ - _Λ

O O Λ Λ ^ -

ο ο ρ γ * b ο Ό D

Α-42 12ο05 ο 1981

Bt / gf

flank can be clearly assigned to a certain position and there a sudden switching stroke occurs, which requires the immediate actuation of the control switch There is therefore no additional switching or control means _{or the like}

Advantageous embodiments of the invention are specified in the further claims «

The invention is explained in more detail below with reference to drawings of exemplary embodiments _β

Show it

a partially shown, in the area of a locking mechanism for operating a control panel ters sliced Prograsaiaschsltwerk at m operated control switch?

Figure 2 _s l is a longitudinal section through the arrangement of Figure

FIG. 3 shows the arrangement according to FIG. 1 with parts of the locking mechanism which are adjusted relative to one another and which are actuated Control switch 5

FIG. 4 shows the arrangement according to FIG. 1 with the locking mechanism returned to the rest position and the control switch actuated 9

,/O

311366 5

- 10 -

Α-42 12ο05 _β ΐ98ΐ

Bt / gf

Figure 5 and 6 show a device for snap actuation of the

Control switch in two different operating positions,

FIG. 7 a locking device for a preselection disk at the program switch,

FIG. 8 shows a longitudinal section through a program switching mechanism with a preselection disk, the control cam tracks assigned,

FIG. 9 shows a longitudinal section through a program switching mechanism with an additional, manually operated switching device,

FIG. 10 shows a principle cushion of a program control mechanism,

in which the control switch is designed as a snap-action switch contact,

Figure II the arrangement according to Figure 10 after an adjustment of the locking mechanism in the circumferential direction,

FIG. 12 shows the arrangement according to FIG. 10 with parts of the locking mechanism and parts adjusted relative to one another excavated lifting pieces and

FIG. 13 shows the arrangement according to FIG. 12 when the locking mechanism has reached its starting position again Has.

OO
O

ο ο ο

11 -

Ä-42 12o05ol98l

Bt / Qf

In a housing 1 of a progressive switching mechanism partially shown is on a shaft 2, a stock drum 3 freely rotatably mounted the cam tracks 4 of the HiocksatroiKifiel control * Program contacts 5, which siad arranged in a set on the housing 1 switch plate 6 is _o to represent shaft 2 by hand zn actuable rotary knob 8 fixed with a likewise rotationally fixed on the shaft 2 fixed code plate 9 rotate is "the code plate 9 is located between the knob 8 and connected to the! drying drum 3, ggfo subsequently plugged · and fixed cam · 1Ο. On the squat drum 3 there is also a link ring 11, the diameter of which is smaller than that of the cam disk 10 or the preselection disk 9 and which reached from the cam disk 10 to the adjacent face of the preselection disk 9 Bearing axles 12 directed towards the cam disk 10, are mounted pivotably at one end on i-jelchen circular-arc-shaped lifting pieces 13

four / can put on the sliding ring 11 ", The ^ lifting pieces 13 close to each other in the longitudinal direction, so that an approximately closed circle is formed _o The radial thickness of the lifting pieces is less than the distance from the sliding ring 11 to the outer surface of the cam disk 10" .

A shift lever that can be adjusted in the radial direction and axially 14 rests on the back 5 of the lifting pieces 13 and is connected to the adjustable contact part 16 of a control switch connected, the fixed contact part 17 is provided in the switch plate 6 «. At the control panel = -

Α-42 May 12, 1981

Bt / gf

ter 16, 17 according to Figures 1 to 4, the adjustable contact part is designed as a simple contact spring. The contact lever 14 rests with an arched surface 18 on the back, the arched surface 18 extending over more than 10 degrees in the circumferential direction 14 is also provided with a scanning cam 19 which, in the position shown in FIGS. The leaf spring is integrally connected to the contact spring 16 and to plug contacts 21 fixed to the housing. The control recesses 22 are assigned to the beginning of individual sections of an overall program, i.e. in a washing program SoB _e the beginning of the cooking program section and the beginning of the spin program section as well as the starting position of the overall program by the arrow 24 indicated UmIaufrichtung the cam drum 3 front side edge are beveled. In addition, a further identification cam is provided on each lifting piece 13 offset in the circumferential direction, the spatial allocation of the lifting cams and identification cams being different on each lifting piece 13. As a result, the lifting cams and cam cams can only fall into the associated recesses 26 and 27 in the sliding ring 11 in a single position. the

α οο

OQ ο

* λ -ι .ί «■■" ^ .-% r *

31 Ί you υ

Α-42 12.05 = 1981

Bt / gf

Identifying cams 25 are also located in the direction of rotation g? Orn lying side edge beveled = on the other hand, the side flanks that are opposite to the direction of rotation 24 are the excavation cusps 23 and cam 25 directed radially, whereby swisehen the sliding ring 11 and the lifting pieces 13 a direction of rotation dependent Barrier is formed »

If, in this embodiment, starting from the operating position according to FIG. 1, a quick adjustment of the Mockentromrael 3 is desired, then the rotary knob 8 is turned by hand to a program point which can be selected on a scale 28, not shown. The selector disk 3 is rotated over the shaft 2, from which the lifting pieces 13 are adjusted in the circumferential direction via the bearing aehs-an 12 _o By this adjustment, the lifting pieces 13 are deflected radially outward due to the bevel of the side edges of their lifting elements 23 _{or identification cams 25} , whereby the lifting pieces 13 which are currently in contact with the switching lever 14 also press the switching lever 14 radially outwards into the position shown in FIG , the leaf spring 20 pushes the shift lever in the axial direction so that the free The end of the scanning knuckle 19 glides over the circumferential surface of the mock-up disk 10. As a result of the radial adjustment, the contact spring 16 is at the height of the fixed contact 1? has been made, while when the scanning cam 19 snaps onto the cam disk 10 and the associated axial adjustment, the contact spring 16 abruptly against the fixed

A-42 05/12/1981

Bt / gf

standing contact 17 is applied »This is the circuit for the changeover of the drive device of the cam drum 3 is switched to overdrive and the cam drum 3 is advanced at increased speed. The control switch 16, 17 remains closed as long as until the scanning cam 19 falls into the next following control recess 22. However, this downshift is only possible possible if the sliding ring 11 with the cam drum 3 was adjusted by the angle of rotation before Before the preselection disk 9 had been introduced »Only then can the lifting cams 23 or the identification cams 25 in the respective associated recesses 26 and 27 collapse, whereby the radial deflection of the lifting pieces 13 is canceled again will. When the scanning cam 19 falls into one of the control recesses 22, the contact spring also snaps 16 with the shift lever 14 from the fixed contact down 3 so that the overdrive of the drive device for the cam drum is switched back to normal gear. Wake up to the collapse of the excavation cams 23 and the cam In the corresponding recesses 26, 27, the preselection disk 9 is due to the steep design of the counter to the direction of rotation the cam drum directed side flank 28 of the lifting cam 23 over the sliding ring 11 with the speed the cam drum 3 rotated. After the cams 23, 25 have collapsed, the preselection disk 9 is also used during rapid run-through adjusted by partial program sections at the same speed as the cam drum 3.

According to FIGS. 5 and 6, the lifting cam 19 has a lifting bevel on its side edge lying at the front in the direction of rotation aur ^ / in the recess 22 a corresponding

DO QOO O OfIO O O ** 5 'Ί Ί Ο / "*

ο ο ο ot. c οο ο ■ < f I \ ~ 'ι ν

Ci O O Ο O O O O O OO ο O O WiIv-ZW

15 -

A-42 I2o05ol98l

Bt / gf

inclined inclined flank. = In the case of a relative adjustment of the cam drum 3 with the cam disk 10, the switching lever 14 is thus axially adjusted via the inclined side edge and thus a preload is created, vjelche the switching lever by the simultaneous radial deflection via the lifting pieces 13 lets jump back to the cam disc 10 when the scanning cam is positioned beyond the outer edge of the curling disc = Xm rest, a tension spring 29 ensures that at least one lifting piece 13 with its lifting cam 23 and looking for the identification cam 25 falls into the associated recesses 26, 27, when the cam drum 3 is readjusted by the angle of rotation that the dial was previously introduced _o This ensures an exact mutual locking in the only predetermined position between the Moclcentrommel 3 and the dial 9 = the lifting pieces 13 are also at their in Urals direction lying in front End mounted on the bearing axles 12 so that they can run without hindrance under the shift lever 14 or «whose curved surface 18 = the lifting cams 23 and the cam cams 25, however, are arranged at the opposite end«,

Finally, locking notches 30 are also provided in the circumference of the preselection disk 9 , which, in cooperation with a latching pawl 31 under the force of a spring, cause the preselection disk to be locked easily over it.

According to an advantageous embodiment, a cylinder jacket approach may be formed 32 to the code disc 9 at its the adjustment knob 8 facing side, which carries at its outer circumferential cam tracks 33 _o About this Steuernocken-

J / (Q

..;. ρ_ · υ ::: · - · ο j. 311

Α-42 "l2cO5.l98l

Bt / gf

lanes 33 are switching contacts 34, 35 operated, which when setting the dial / regardless of the Let the cam drum 3 operate in the normal program sequence however, run synchronously with the cam drum 3. This arrangement is for a main switch, for example suitable, the one at the end of the program by appropriate design the control cam tracks 33 is switched off automatically and at the start of the program by turning the adjusting knob can be switched on again.

Another possibility for attaching a main switch is shown in FIG. Here is between one Preselection disk 9 and the setting knob 8 a switching disk is arranged, which sits non-rotatably on the setting shaft 2. The dial 9, however, is adjustable on the Setting shaft 2 supported. The preselection disk 9 and the switching disk 36 are via an axially directed driver 37 coupled in such a way that mutual rotation is prevented, axial adjustment of the switching disk however is possible. By pulling the adjusting knob 8, the switching disk 36 is adjusted axially via the adjusting shaft 2 "with its switching edge 38, which is concentric to the setting shaft 2, over a radially adjustable slide 39 an inclined adjusting flank 40 arranged thereon pushes outwards. The switching contacts 34 a main switch can optionally be switched on and off by axial adjustment of the setting knob 8.

Finally, it is also possible to design the control switch as a snap-action switch contact, its adjustable contact spring 16 via a spring 42 with the shift lever

O 1 ι f ι γ ¹ λ γ

ο ι ι b ο ο

Α-42 _ 12o05ol98l

Bt / af

is coupled «Here is carried out as follows, the Switching hysteresis of snap switches exploited, through which the adjustable contact piece 16 assume different switch positions with the spring spring 42 in the same position Starting from the initial position of the arrangement shown in Figure 10, the scanning cam 19 is in a Control recess 22 sunken The shift lever 14 is therefore roit its curved surface 18 on the back 15 of a Lifting piece 13 to »The point of application 43 provided on the shift lever 14 for the spring 42 lies below the dead center line of the spring 42, whereby the adjustable contact piece 16 is pressed against the upper fixed contact 44. If after that the cam drum 3 is advanced by its drive device with the cam disk 10, the shift lever 14 can over a draft be pivoted radially outward without axial adjustment until the scanning cam 19 on the The circumference of the squat 10 is seated, as shown in FIG. 11, although this is the point of application raised to the dead center line of the snap switch, but no changeover yet takes place due to the switching hysteresis of the adjustable contact piece 16 »This keeps the snap switch in the off position» The cam drum 3 is thus further advanced at the normal drive speed. “However, according to FIG an adjustment of the preselection disk 9 a radial deflection of the lifting pieces 13, then the switching lever 14 is additionally raised so that the scanning cam 19 moves away from the outer surface the Mackenscheibe 10 lifts through this susätaliche The point of application 43 of the spring spring becomes radial excavation 42 is raised above the dead center line and the adjustable contact piece 16 snaps to the lower

A-42 05/12/1981

Bt / gf

standing contact 45. As a result, the overdrive of the drive device for the cam drum 3 is switched on and remains switched on when the lifting pieces are re-adjusted after the cam drum 3 has been adjusted accordingly have fallen into the associated recesses in the sliding ring 11. Then the scanning cam 19 is seated again the circumference of the cam disc 10, but then the adjustable contact piece 16 switches due to the switching hysteresis not yet back, although the point of attack 43 of the Spring spring 42 on shift lever 14 is returned to the dead center line. Only when then the scanning cam 19 can fall into a subsequent control recess 22, the point of application 43 is again below the dead center line reset and the adjustable contact piece 16 jumps back to the upper fixed contact 44. Then is the overdrive of the drive device is switched off and the further indexing of the cam drum 3 is normal Drive speed executed «. In this embodiment it is sufficient to pivot the shift lever.

Claims (1)

O OO ο β ο OO ο O
OO O OO OO O *} O O ö ο ocoo 11 IQC -> ι I Ju May 12, 1981 Bt / gf Expectations (IoJ program control unit, especially for washing and Dishwashers, with a cam drum which is coupled to a drive device, the speed of rotation of which via a control switch on one increased value is switchable, and with a Vorvjaheinrichtung their angular position relative to the cam drum can be adjusted by hand via a locking mechanism that is dependent on the direction of rotation, one being adjustable against a restoring force Switching lever of the control switch via cams on a cam disk coupled to the cam drum is controlled, which is then in the upright position increased cam track sections, abruptly falling cam edges has, characterized in that the shift lever C14) over the locking mechanism during the initial adjustment the preselection device is raised against the restoring force on a raised cam track section and the control switch the drive device to the increased drive speed switched 2ο program circuit according to claim 1, characterized in ~ net that the locking mechanism has several arcuate lifting pieces (13) which are radially adjustable on the dial (9) held and in an almost closed circle concentric to a circular link ring (H) the cam drum (3) are arranged and that on the lifting pieces (13) radially directed excavation cams (23) with a Α-42 May 12, 1981 Bt / gf inclined edge and recesses adapted to the link ring C11) (26) are provided o 3 »Program switching mechanism according to claim 2, characterized in that that on the sliding ring (11) facing away from the back (15) at least one lifting piece (13) of the adjustable Shift lever (14) rested 4o program switching mechanism according to claim 1 or one of the following, characterized in that the cam disk (10) is arranged adjacent to the sliding ring (ll) and with the Cam drum (3) is integrally connected, the beginning of individual program sections on the circumference of the cam drum (3) has control recesses (22) assigned to a predetermined total program and that the shift lever (14) a scanning cam (19) engaging with the circumference of the cam disk (10) and the control recesses (22) is arranged. 5 _e program switching mechanism according to claim 1 or one of the following, characterized in that at least one cam (25) is assigned to the lifting cams (23) on each lifting piece (3), that an additional adapted recess (27) in the link (ll) is provided and that the lifting cams (23) and the identification cams (15) are arranged differently on each lifting piece » 6 «, program switching mechanism according to claim 1 or one of the following, characterized in that at least one lifting piece (13) is under the force of a spring whose Direction of force to the backdrop (11) is directed. O ο O Α-42 I2o05 * l98l Bt / gf 7ο program switching mechanism according to claim 1 or one of the following, characterized in that the lifting pieces C13) επ are hinged to their front end in the direction of rotation pivotably zn the preselection disk (9) *. 8. Programmschaltitferk according to claim 7, characterized gekennseich = net that the cam (25) and the articulation cam (23) the » free end of the lifting pieces (13) are assigned « 9 _O program switchgear according to claim 1 or one of the following, characterized in that the switching lever (14) is in the axial direction of the mock drum (3) under the force of a spring (8) and in the unactuated position with the scanning cams (19) laterally on the Cam disc (10) rests and in the actuated position rests on the circumference of the cam disc (10) 10ο Program switching mechanism according to claim 1 or one of the following, characterized in that a contact spring of the control switch is arranged on the switch lever (14), in the adjustment range of which there is a fixed contact Ho program switch according to claim 1 or one of the following, characterized in that the direction of rotation of the front radially directed side edge of the control from savings (22) and / or the scanning notch (19) is inclined on the longitudinal axis of the drying drum (3), 12 «program switch according to claim 1 or one of the following, characterized in that the front pulley (9) Is provided with a cylindrical jacket extension (32), A-42 l2 _e 05 «l98l Bt / gf on which at least one control cam track (33) is provided and that the control cam track (33) is assigned switches (34, 35) are, 13. Program switching mechanism according to claim 1 or one of the following, characterized in that the preselection disc (9) is mounted at least axially adjustable on an adjusting shaft (2) that the adjusting shaft C2) with a by hand actuatable adjusting knob (8) is firmly connected and axially adjustable and rotatably mounted in the switchgear housing (l) is that on the adjustment shaft (2) a relative to the preselection disc C9) non-rotatable switching disc (36) with a concentric to the adjustment shaft (2) lying switching edge (38) is fixed and that in the adjustment range of the switching edge (38) an actuating plate (39) for a main switch (34, 35) is arranged. 14. Program switching mechanism according to claim 13, characterized in that the actuating plate is a radial to the setting shaft (2) slider (39) mounted displaceably on the switching mechanism housing Cl), which is a radially directed and to the setting shaft (2) has inclined adjusting flank (40) in the adjustment range of the switching edge (38). 15 _o Program switching mechanism according to claim 1 or one of the following, characterized in that one end of the spring (42) of a snap switch (16, 42-45) is clamped on the switching lever (14), the second end on the adjustable contact piece (16) of the snap switch is clamped in that the snap switch has a travel-dependent switching hysteresis and that before actuation of the lifting pieces (13) O C- ^ö · oo ο α ο _ö d I 1 bb; A ^ AJ, 12eO5cl98l Bt / gf the clamping point (43) of the spring on the switching lever C14) is independent of the point of engagement of the scanning cam (195 ara circumference of the cam disc ClO) or in a control recess (22) on this side of the dead center line, so that the scanning cam C19) is radial when the lifting pieces C13) are actuated is lifted over the circumference of the cam disk ClO) and the clamping point (43) of the spring (42) on the switching lever (14) lies beyond the dead center line, as long as the abtsstnoclten i: stands up on the circumference of the cam disk ClO) or stands above o I6o program switching mechanism according to claim 1 or one of the following = the, characterized in that the shift lever C14) a hollow arch surface C18), the radius of which is approximately the Radius of the cam disk (10) is adapted and extended over at least ten degrees 17c program switching mechanism according to claim 1 or one of the following, characterized in that the cam disc ClOi placed on the cam drum (3) and fixed on it is ο 18 «, program switching mechanism according to claims 17 _9, characterized in that the link ring ClI) is connected in one piece with the cam disk ClO)