DE1954193A1 - Time-keeping drive - Google Patents

Description

Dr.-ing. Diploma Phys. OSKAR KÖNIG patent attorney 1954 193

Telephone: (0711) 6285 β! Telegram: Koenigpat STUTTGA-RT-W ₁ Kltipfelstraße 6

Deutsche Bank AG Stuttgart account number 89 / OO300 Postal check Stgt. 84919

2299 c-5

ZMEEA Albert Bürkle Konuaanditgesellactiaf-fc

Schönaich

Time-keeping drives

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The invention relates to a time-keeping drive with a regulator, a mainspring and a die . «Mainspring self-winding and kept under tension [the electric drive motor "Such time-keeping \ Drives can have different areas of application have, for example, the drive of clock hands of a clockwork and / or the drive of a Zeitschaltwarkes or the like. The invention preferably relates to drives for time switches with power reserve, without being limited to this.

With drives of this type, a distinction can be made between two drive principles. With the one Drive principle, the drive motor only serves the elevator the .triebfeder and can be used, for example, as a DC motor be trained. With the other principle. the drive motor is designed as a synchronous motor and serves both the winding of the mainspring and the Synchronization of the gear regulator, for example by means of • a · crank drive »which is driven by it the restlessness one in the vicinity of its natural oscillation frequency The lying oscillation frequency, which is strictly proportional to the speed of the SyncnronEotors is »d. H." the synchronous motor also serves the Synchronization of the (Jang regulator.

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With both types of drive it is necessary that the drive motor pulls the mainspring much faster can wind up as she is under control of the gear regulator relaxed.

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In the case of the first-mentioned principle, one went to the So far, Hegel has planned to switch the drive motor on and off, so that the mainspring only occurs at intervals is raised. Ms alternating switching on and off the engine is in many cases un- wishes. The tension of the mainspring also fluctuates within relatively wide limits, which has a negative effect on the accuracy *

In the case of drives with synchronization of the gear regulator, the drive motor must run continuously because it is simultaneously serves to synchronize the gear regulator. Up to now, such drives have often been equipped with a slip clutch that starts to slip when a certain winding torque is exceeded, so that the mainspring is no longer wound up. TTm the power reserve created by the mainspring To use as optimally as possible, it is desirable here that the slipping clutch is only grinded shortly before the mainspring is fully wound. However, it has been shown in practice that one with such hat-sight couplings there is considerable f oi «vain ~ aen of the elevator moment has to be accepted with wallen the sliding begins, so for safety reasons a relatively large proportion of the possible spring energy of the mainspring is not used as a power reserve can be - if namely the slip clutch would not respond until the mainspring is fully open, the mainspring would be accommodated! be twisted as a whole, with the result that

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the armature of the gear regulator hit the stops on both sides that limit its oscillation movement would, which is very detrimental and known as bouncing, or it may cause the spring to tear off or other serious damage. In addition, slip-on clutches have the disadvantage of a relative high wear, are prone to failure and increase the energy consumption of the drive motor.

It is therefore an object of the invention to provide a time-keeping drive device of the type mentioned at the beginning To create a way in which the above-described and other disadvantages of the known time-keeping drives of this type are avoided, which has a simple, reliable design and an exact setting ' ment of the winding momentea of the mainspring allows.

In particular, the invention aims, inter alia, to ensure that when the drive motor is running at high speed the mainspring can be almost completely wound up by it without the risk of the Elevation of the mainspring and damage caused thereby and that also the tension the drive spring is kept approximately constant with the drive motor running continuously.

To solve this problem, with a time-keeping drive of the type mentioned above, according to the invention it is provided that the drive motor pulls up the mainspring via a torque limiting device, the two relatively movable together

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has acting driver elements that have a common circulation valve on which the drive-side Driver element to the driver element on the output side this catching come to the plant and can take to wind up the mainspring, and that at least one of the. two driver elements mounted transversely to its orbit so as to be movable against a restoring force developed by restoring means which is overcome at a certain winding moment of the mainspring, so that when exceeded this winding torque the drive-side driver element overtakes the driven-side driver element and then it is out of engagement with it until it has caught up with the drive element on the driven side again.

So this torque "limiting device" has at least two driver elements. For example, can they have a driver element on the drive side and a plurality of driver elements on the output side, or vice versa. Or it can be both abortion and a plurality of driver elements can also be provided on the drive side. With one structurally special simple, preferred embodiment are output and only one driver element is provided on the drive side.

The driver elements can be in any suitable Way to be designed and arranged if they only cause that or the drive-side Driving elements when in contact with the one or more output side Driver elements can only transmit a certain force, d. i.e., a specific turning point

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moment on the drive shaft and thus a certain Can transmit winding torque. When riding over this Force and thus the winding torque overtake the driver element or elements on the drive side relevant drive elements on the output side.

In order to prevent the drive element on the driven side from being affected by the tension after overtaking the mainspring is moved back on its orbit, it can preferably be provided that the mainspring a backstop is assigned, for example can be designed as a ratchet wheel cooperating with a pawl, the The ratchet wheel can only be turned in the upward direction of the mainspring. In some cases it can be useful be the distance between the adjacent drive-side or driven-side driver elements To make it so small »that a disruptive backward movement of the drive element (s) on the driven side is prevented will. For example, the drive elements on the output side can be used as teeth of a gearwheel and the drive-side driver element as resiliently mounted in the radial direction, in the space between two teeth engaging ball be formed, which when overtaking over the tooth in question in the next Tooth gap gets,

If driver elements on the drive side or on the drive side were mentioned above, then it should be understood it is that the puncture of the driver elements always

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can be interchanged, i.e. that the output-side Driving elements <also as drive-side if required Driver elements and accordingly the drive-side driver elements as the output-side Driver elements can be provided.

The torque limiting device according to the invention can be used as a locking mechanism in some respects are referred to, the two relative to each other rotatable members carry the driver elements or in some cases can also form expedient.

The drive according to the invention is particularly suitable as well as for drives in which the drive motor is used exclusively as an elevator motor also for drives in which the drive motor, which is designed as a synchronous motor, not only drives the elevator here as a power reserve serving mainspring, but at the same time also the synchronization of the gear regulator serves.

The invention enables _s form the torque limiter device practically vexsebleißfrei by at least one driver element as rolling elements, preferably designed as a ball and is rotatably supported.

The invention also makes it possible to use the maximum winding torque of the continuously running electric drive motor to be able to adjust in a simple manner, which can be achieved with advantage that the

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when overtaking su overcoming restoring force of Resetting means of the transversely movable driver element is adjustable, d. h. that the Overtaking the maximum setting contact pressure of the transversely movable driver element on the one interacting with it Driver element is adjustable. This can be done, for example, by adjusting the return means or by adjusting the position or size of one or both of the interacting driver elements take place.

It is preferably provided that the return means are designed as return spring means. These 3? Edermittel can be integral with the

relevant driver element connected or separate spring means.

In order to save on components, it can expediently be provided that at least one driver element is attached a gear of the transmission of the time-keeping drive ■ is arranged.

TJm the transversely movable driver element when the set winding torque is reached in one of the Overtaking the drive element on the output side enabling position to be moved »can expediently at least a driver element in the manner of a cam with an inclined trailing edge for the other driver element be educated.

108819 / 08-1 1 _1AÖ original

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A particularly reliable and space-saving training, which is particularly suitable as a rolling element designed driver element is suitable, can be achieved in that the transversely movable driver element in an opening of a rotatably mounted guide member at a distance ..from its axis of rotation and by means of a compression spring loading it in the direction of the orbit of the other driver element is pressed. The compression spring forms the restoring means of this driver element.

The associated with the transversely movable driver element Resetting means can be rotatably fixed in adjustable, different relative angular positions with the be connected to another driver element.

The invention is described below on the basis of a preferred one Exemplary embodiment explained in more detail, with it is understood that it can be implemented in numerous other embodiments.

Show in the drawing; .-

Pig. 1 is a schematic diagram of an inventive Clock drive,

Pig. 2 is a longitudinal, enlarged illustration the torque limiting device of FIG. 1,

Prop. 3 shows an excerpt from 3 ¹ Ig. 2, being

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one driver element in a different position than in Pig. 2 is located,

Figure 4 is a side view of the Pig. 2, seen in Direction of arrow A.

The one in Pig. 1 schematically, shown synchronous clock has a side-holding drive, designated as a whole by 10, which drives an hour hand 11 and an index pointer 12 is used. This drive can also drive a program disc of a timer in a manner not shown or the like, as it is particularly suitable for this purpose due to its power reserve.

The drive shown has a synchronous motor 13, one arranged in a spring housing 14, usual, not shown, spiral-shaped mainspring, a torque limiting device 15 having Gear 16, which connects the output shaft 35 of the synchronous motor with the pedestal core shaft 18 of the mainspring to wind it and one with the spring housing 14 motion-locked transmission 19 for time-controlled by means of a gear regulator 20 Drive of the minute and hour hands. The regulator 20 can be of any conventional type and has a restlessness not shown, whose Vibration with the synchronous motor 13 on the dashed line indicated line of action 21 is synchronized in any known manner. Su this purpose can for example one end is proportional to the rest spring

ORIGINAL

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to the speed of the Synohron motor via a suitable Crank drive forced back and forth with a! Frequency are moved, which is approximately the Sigensohwingungsfrequenz corresponds to the "unrest, so that the unrest spring exclusively oscillates with this forced frequency, which is strictly proportional to the speed of the Synohron motor.

Between the torque limiting device 15 and the spring housing 14 receiving the mainspring on the output shaft 22 of the torque limiting device, a ratchet wheel 25 is fixedly arranged with a at a stationary fastening point pivotably arranged pawl 24 cooperates and a return lock forms, which prevents the tension spring located in the spring housing 14 from relaxing.

Since the drive shown, except for the new type of torque limiting device 15, from in principle on ' is of a known type, only the torque device is used below in more detail, in particular "explained" with reference to Figures 2 to 4

On the output side shaft 22 of the device before is a sleeve 27 by means of a clamping screw 25 in different Angular positions infinitely adjustable. On this shaft 22 is also an output-side Gear 26 fixedly arranged, on which a carrier glieä 29 designed as a disc is fixedly arranged, the a spherical cap-shaped projection integral with it or crouching 30 carries, as an embossing of this

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Disc is formed and a driven side driver element with inclined run-up surface for a drive-side Driver element 31 forms. Between the sleeve 27 and the gear 26 is another, larger gear 33 »whose core is designed as a bearing sleeve 34, which is rotatably mounted on the output shaft 22 with little play. This Gear 33 .is * like from Pig. 1 can be seen over some idler gears connected to the output shaft 35 of the synchronous motor 13 and locked in motion is therefore of the synchronous motor, which runs continuously, correspondingly continuously at a speed of the synchronous motor proportional, lower speed counter driven, for example with a rotational frequency of 0.1 Hz.

The output shaft 22 has pins at its two ends, by means of which it is not shown in FIG Sinkers that support the (gearwheels, rotatable is stored. ,

The drive-side driver element 31 is in this preferred embodiment, a rolling element, namely a ball, which in FIGS. 2 and evident way in a circular cylindrical through hole 40, the axis of which is directed parallel to the pivot axis of the output shaft 22, of the gear 33 with little game, so that this ball is in this they can turn leading Durohbrueh 40. On the sleeve 27 a thin spring washer 41 is attached, the Shape can be seen particularly clearly from FIG. This spring washer 41 can by rotating the sleeve

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relative to the output shaft in different Angular positions relative to the gear 26 and thus be adjusted relative to the S carrier member 29 »These Spring washer 41 holds the ball in its normal relaxed position in the position shown in FIG Location in which this ball is preferably low Game in between the spring washer 41 and the disc-shaped Xräger member 29 existing space lies.

The axis of the bore 40 has the same radial Distance from the output shaft like the axis of symmetry of the driver element 30, so that the ball 31 and the driver element 30 can circulate in the same orbit.

The output shaft 22 will lock the buyback du2J0h 23 * 24 always held when aioh the antrlebeseiten Driver element 31 out of engagement with the output side Driver element 30 is "as long as the latter driver element 30 is standing", i.e., as long as the output shaft 22 is not rotating, it is in the spring housing located mainspring by the synchronous motor 13 is not drawn up so that it slowly relaxes while turning the pedal housing 14 with the spring core stationary. " With increasing relaxation, the amount of synchronous motor 13 required to wind up the drive spring decreases to be exercised via the torque limitation device 1.5 Winding moment

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Ba the drive-side Mitnehraer «ilemerit 31 constantly rotates with the gear 33, it comes from the position shown in Fig. After half a revolution of the. Gear to the driven-side driver element 30, to the plant and thus in engagement with him, i.e., it comes at the sloping slope facing him; arched flank of the driver element 30 to the plant and can then entrain this driver element 30 and thus the drive gear 26 and consequently the carrier member with the! Eriebfeder connecting gear and thus the Drive the spring core so that the mainspring is wound will·. This increases the required winding torque with increasing tension of the mainspring. Corresponding Increasingly increases the size of the ball 31 to the output-side driver element 30 exerted force, the ball only to exert this force the arch-shaped leather 43 of the spring washer / support can · Biese peeler 43 is set in such a way that the ball 31 the leather 43 pushes outward so far that the ball wafts away over the drive element 30 on the driven side (Pig. 3), i.e. this is overtaken. As soon as the drive by the ball 31 is missing as a result of this overtaking, remains the drive element 30 on the driven side stop immediately so that the mainspring is no longer wound up. As soon as the ball 31 is almost a full turn

. Comes to rest on the driver element 30 again, the mainspring can be rewound up to the limit pull-up torque determined by the setting of the baths 43. If this gate movement is repeated sufficiently quickly, which does not cause any difficulties, the drive spring can be slackened very little between two successive winding processes, so that the tensioning spring can be kept practically constant.

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The ball 31 on the drive element on the driven side 30 pressing spring 43 is here as a circular ring segment and thus "arched spring formed, the sioh over an angular range of rotation path of the transversely movable driver element from in this embodiment extends approximately 300 ° and its two ends are integral with the one holding part forming, firmly arranged on the .Hülse central part

" ", "_ ^ A * the ^ stelves 45 of the spring washer 4 V are connected. The gear 33, which forms a guide member for the drive-side driver element 31, is arranged between the spring washer 41 and the driven-side driver element 30

So that the power reserve in the spring housing mainspring located in the failure of a power failure is as large as possible, it is necessary to wind the mainspring as far as possible, but not may be pulled up to its stop. The illustrated spring washer 41 serving as a restoring means allows a sensitive, stepless setting here the limit lift torque from which the mainspring is no longer wound up. As a result of the presented. provided training of this torque limiting device 15 sioh changes the set limit lift torque practically not and is also practically independent of external influences «

The setting of the size of this G-rensaufzugmoment takes place in that the Elemmsohraube 25 of the sleeve 27 carrying the spring washer 41 is released and the sleeve 27 old of the spring washer 41 relative to the Output gear 26 and thus relative to the output

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At part of the driver element 30 is pivoted »Aus Pig» it can be seen that when the center of the arcuate each 43 opposite the driven side driver element 30, the Eeder 43 with the least force in the Pig. 3 position shown can be moved, in which the ball 31 rolls over the drive element on the driven side. if

the "ξθάθτ _Λ 43 from ^ this position, the lowest resetting so relative to the driver element 30 force relative to the carrier member 29 / is pivoted in one direction or the other, the restoring force of the spring 43 opposing the overtaking of the element 30 increases increasingly and accordingly the size of the winding force up to which the mainspring is wound increases _e

In spite of its constant drive, the device 15 causes the mainspring to be wound at intervals. If the speed of rotation of the drive element 31 is not too slow, it arises with regard to oie, slow relaxation of the mainspring a practical ' Uniform tension of the mainspring during operation, since after every overtaking of the drive element on the output side 30 with the driver element removed from the drive this after just under one turn with the output side Mitnehmereleiaent 30 comes into engagement again.

The illustrated design of the drive-side driver element which is transversely movable relative to its trajectory 31 as a ball has, among other things, the gate part that this driver element has very little inertia and no adverse friction occurs.

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Advantages of the device 15 are, inter alia, that it is practically, not subject to any closure, and low in noise is, is structurally simple and operationally safe and also only takes up a small amount of space. Your borrowed Adjustability and the accuracy with which it limits the elevator room and the effective tension of the Mainspring adjusts »are further essential advantages, which among other things also a better utilization of the power reserve allowed than before, namely the! mainspring serves as a G-angr reserve in the event of a power failure,

It goes without saying that the invention can be implemented in numerous variants. As a simple example, it should be mentioned that instead of a single drive element 31, several such balls can be arranged in preferably equal 2entriwinkelabstands from each other through holes of the cog wheel, so that with unchanged drive speed of the gear after each overtaking of the driven element by a ball the next ball _f comes in a correspondingly shorter time interval for engagement with the drive element on the driven side

It goes without saying that the invention - although particularly advantageous - does not apply to the formation of a Driver element limited as a rotatable roller body, but this driver element can with lower requirements to the spanking strength as well as in the Bore 40 mounted pin or the like. Be formed. Or the drive element on the output side does not need as shown, to be formed in the shape of a spherical segment, but can also be any other suitable shape

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if it is only designed in such a way that the Driving element on the drive side when the set limit value of the winding torque is reached the action of the restoring means can migrate over it · Of course there are also numerous others Modifications of the new time-keeping drive possible"

In the illustrated embodiment, the transverse mobility that enables overtaking runs of the driver element 31 with respect to its orbit in axial direction »ά.tu parallel to the! axis of rotation of the output shaft 22 * Such an axial Quörmobilliohkeit is generally particularly advantageous. In many cases, however, the transverse mobility can be advantageous of the relevant driver element in relation to the Orbit run radially or inclined to the orbit plane *

As can also be seen without further ado, the torque limiting device according to the invention can also be used in connection with time-keeping drives in which the variable speed regulator is not synchronized with the drive motor. In this package , of course, the drive motor does not need a synchronous motor, but some other suitable electric motor, for example a let the drive motor with the gate part run continuously jsu »So ver

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This drive needs practically no energy during the time during which the mainspring is not wound up, since whenever the two driver elements 50, 31 are out of engagement with one another, the gear 53 rotates practically without resistance and consequently the drive motor does not turn any appreciable Must give up performance. One advantage of such a non-synchronized drive is, among other things, that the tension of the mainspring
fluctuates much less than before and can be kept practically constant, which increases the accuracy of this time-keeping drive.

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Claims (1)

to Patent claims Timed drive with a gear regulator, a mainspring and an electric drive motor which automatically winds up the mainspring and holds it tensioned, characterized in that the drive motor (13) pulls the mainspring via a torque limiting device (15) which has two interacting driver elements (3O _r 31), which have a common orbit on which the drive-side driver element (51) can come to rest on the driven-side driver element (30), catching it, and take it along to wind up the mainspring and that at least one of the two driver elements (31) is movably mounted transversely to its orbit against a restoring force exerted by restoring means (43), which is overcome at a certain winding torque of the mainspring, so that when this winding torque is exceeded, the drive-side driver element (31) overtakes the driven-side driver element (30) and then for as long is out of engagement with him until it has caught up with the drive element on the driven side again. ■ 2 «Time-keeping drive according to claim 1, characterized in that that the drive motor is designed in a known manner as a synchronous motor (13), the at the same time serves to synchronize the gear regulator (20). - II - 109819/0811 IA .3 β time-keeping drive according to claim 1 or 2, daduroh characterized in that at least one driver element (31) is a rolling element, preferably a ball is * i ·. Time-keeping drive according to one of the preceding Claims, characterized in that the restoring force of the restoring means to be overcome when overtaking (43) of the transversely movable driver element (31) is adjustable in different sizes. 5. Time-keeping drive according to one of the preceding claims »daduroh characterized in that the return means are designed as resetting spring means (43). 6. Time-keeping drive according to one of the preceding claims, characterized in that »the! Mainspring a backstop (23 »24) is assigned. 7. Time-keeping drive according to one of the preceding Claims, daduroh characterized that driving at least two on each side and / or on the output side Driver elements are provided. 8. Time-keeping drive naoh one of claims 1 to 6, characterized in that only one drive-side and drive element (30,31) on the output side are provided * - HX - 109819/0811 9 »Time-keeping drive according to one of the previous ones Claims »characterized in that at least one driver element (30,31) on a gear of the transmission of the time-keeping drive is arranged. 10 · Time-keeping drive according to one of the preceding Claims, characterized in that at least one driver element (30) in the manner of a cam is designed with an inclined run-up edge for the other driver element * 11. Zeithai ⁴ snder drive according to one of the preceding claims, characterized in that the transversely movable Mitnehraerelement (31) guided in a preferably axial Durohbruch of a rotatably mounted guide member (33) at a distance from its axis of rotation and by means of a compression spring loading it (43) is pressed in the direction of the orbit of the other driver element (30). 12. Time-keeping drive according to one of the preceding Claims, characterized in that with the transversely movable Driver element (31) interacting driver element (30) as a projection of a rotatable mounted, preferably disc-shaped support member (29) is formed. 13. Time-keeping drive similar to one of the previous ones Claims, characterized in that the transversely movable driver element (31) assigned - 17 - 109819/0811 Resetting means (41) in adjustable Relative angular position rotatably with the other driver element (30) are connected. 14β time-keeping drive according to claims 5 and 13, characterized in that the return spring means (41) have an arcuate spring (43) extending parallel to the orbit of the driver elements, the two ends of which are firmly, preferably integrally, connected to a holding part (44). 15. Long-term drive according to claim 14, thereby characterized in that the bent part and the arched spring as a common spring washer (41) are formed, wherein the transversely movable driver element (31) leading Fiihrungsglieä (33) between the spring washer and the other driver element (30) is arranged 109819/0811