DE7135087U - Device for rebound damping - Google Patents

Description

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Device for rebound damping KEYWORDS

Impact absorption, stop, bouncing, bounce-free, rotatable. Swivel anchor, Relbungssohluss, DKnkungeaaeee, Oleltmcment, sliding movement. ·.

SHORT VERSION
(Device for rebound damping for a rotatably mounted Syatea. This consists of two relbseblüsslg interconnected parts, of which one (1) hits a stop and the other (7,8) moves on while overcoming the frictional force · The part that moves further (7,8) bealtst swel mutually opposite, balanced with respect to the pivot point (7) - These are firmly connected by an elastic connecting piece (8) against a part between them, which is at the same time at the same time, the cylinder (3) pressed - possible configuration:

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The part that moves the world over has two approximately half-length shapes Segments (7). The elastic flat connector is a springy wire (B) * The moments of inertia of the two Parts are chosen in such a way that the bump tent of the abutting part (1) continues to move at the same time as the oil time the part (7,8) 1st. The Oleitmoment of the moving on Part (7,8) is larger than that acting on this part maximum drive torque and sufficiently small for it »safe Movement occurs after bumping into something.

DESCRIPTIONUNa

The hiring concerns a device for Hückprailääne for a rotatable system that consists of two frictionally connected parts «one of which hits against a stop and the other moves on while overcoming the frictional force.

Rotatable systems are used in apparatus engineering Rotation range is limited by stops. The rotational energy inherent in the moving system settles in the suddenly forced standstill in heat, mechanical work and in turn into kinetic energy. This leads to the most undesirable bruises.

To get a swinging body as fast as possible to rest various dampening measures can be carried out be. Fluid, air and friction dampers, for example, are known. For rotary solenoids that are made up of two equal, over mutually arranged and rotatable about the same axis half-

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It is known that the rotatable part consists of two to produce relbly interconnected halves, where another half is protruding over the other half First hit nose to stop. The .back impact pulse of the half is due to the kinetic energy of the second Half compensated by moving in opposite directions Inhibit movements via the frictional connection and the energies themselves are converted into frictional heat. This solution is always

but only intended for the special case that the rotatable '' 'system itself already consists of two halves that face each other can be twisted.

DäwpfurgK *> jwlchtungen were therefore also known which have an additional "" damping mouse which is moved along with it and which is not rigidly coupled to the wet surface that is in contact with the stop. At a known facility; this coupling takes place via a transmission, generally however, it is prepared by a Relbung & ächluss · So 1st provided, for example a two-part annular C \ damping cup. Between the two parts there is an elastic connecting piece which presses the damping ring against the outer Wanielner cylindrical bush. The force of the connecting piece can only be regulated with difficulty, so that a predetermined damping cannot easily be achieved. Another embodiment uses a closed ring that is wedged between two opposed leaf springs. The leaf springs are attached to the wet end that touches the stop

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Part of this, however, is still the friction between metal and metal} are a backlash-free sliding and a pure rotational movement of the steam uneemaäee nicht göwwürieiäWt · ewnliwSallm The damping dimensions can also be made of a granular material. e.g. Lead or steel ear red consist «that is in a ring-shaped Chamber of the rotating system is located. BoI of this arrangement occurs, however, a position-dependent, not defined Friction noaent.

2) The following requirements apply for a perfect DMsp test:

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2. Pure rotational movement of the sliding Dfapfungi J. Backlash-free sliding
♦ · Adjustability of the Gleltaoasntea

5 Oute sliding properties, e.g. as with metal on plastic.

The known Dttapfungseinrlohtungen meet the mentioned Requirements Sub part only. It is therefore the task of the present innovation to create an institution the santllche conditions are met «

This task is solved in the aags-mentioned device snap RuokpralldSapfung innovationsgea & as by the fact that the "because the moving fur swel opposite each other has halves balanced with respect to the pivot point, which; by an elastic connecting piece against »inside between ^v

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flying »be pressed with the cylinder that is firmly connected to the bottom part · The moving part advantageously has two approximately semicircular segments. The elastic connector is preferably a resilient wire. The moments of inertia of the two parts can be chosen in such a way that the impact tent of the attached part is equal to the sliding time of the lower part that moves the world. The momentum of the moving part is greater »than the maximum drive torque acting on this part and sufficiently small for the safe occurrence of further movement after the impact.

Hiring is shown in the following with reference to the figures Embodiments explained in more detail.

Show it:

Flg. 1 is a view of a device shown schematically according to the invention,

Flg. 2 shows a vertical section through the device according to FIG Flg. 1 and

Flg. 3 a rotating armature relay with a device for rebounding !.damping.

The damping device shown in FIGS. 1 and 2 has a rotating part 1, which consists of a ring 2 from eggs, a cylindrical inner part JJ and a transverse part connecting them 4 consists. Via a shaft 5, the rotating part 1 is

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ti Il

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teren «rotating components feet connected to their range of rotation limited by one or two strokes 1st.

There is a recess between the ring 2 and the part 3, in which the attenuator is arranged. The recess is covered by a disc 6 that is in the pig. 1 nlobt shown 1st. The attenuator consists of two opposite one another Segments 7, which are connected to one another by a resilient wire 8. The wire can run in the longitudinal direction of the Segnents are located extending bores or inserted into correspondingly extending grooves and by pressing in notches be stuck in this.

The segments 7 are rotated with the rotating part 1 due to the static friction on the sliding surfaces 9, but slide further by a certain angle when the rotatably mounted system hits the cylndrisohen Toll Z> and in this way make it difficult for the rotatable system to rebound.

The device shown is advantageously carried out in the manner that the flextime of the Danish agile system up to a standstill is the same as the bouncing tent of the rotating system after the bump to the stop until the optimal prellhtthe 1st. In this case the following relationships apply!

V, ie -TJ - ⁵ ^ d »h. α ^β σ 'A

, ie Ι _Λ - kI ^Q

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ι. "llf ^ ■ > ν. .

In this mean? I _{0 is} the polar moment of inertia of the sliding attenuator,

I. the polar moment of inertia; of the rotatable system without that Attenuator ,.

t _Q 'the aieitzelt of the attenuator, t.'the bounce time of the rotatable system, m the angular velocity before the impact. ) v'dle angular velocity after bumping,

« _A 'the delay of the rotatable system after the impact, C ₀ ' the delay of the attenuator after the impact and N the Oleitmoment.

The constant k is called the burst number and corresponds to this

* / —— ι «ι ²

Expression γ5 '/ E, where E »(I _A + I _a ) · ^ = - the Estatlonsenergle des

entire system, i.e. elnsohliesslleh the attenuator un-

oj ' ² indirectly before the impact and B'- I. ·· mean that of the rotatable system alone, ie without the attenuator, immediately after the impact.

By suitable selection of the moments of inertia of the rotatable system and the damping element, it can thus be achieved that the Qleltzelt equal to the bounce tent and thus an effective rebound damping is guaranteed. If the moment of inertia of the damping element is chosen to be too small, the damping effect is reduced not fully used. If, on the other hand, this moment of inertia is chosen to be too large, then there is an unnecessary slowdown of the braking process · ./.

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A suitable measurement of the sliding aaent is ebeafaAl «

to take. In the event of any impact, the damping element should be βίβοικτ cJlgp · i ^ ten. In contrast, the sliding moment must always be “it” as the maximum drive moment.If it is too small, ie barely perceptible, there is the fact that the mass of the entire system, ie oil Sanas that of the rotatable system and the damping element acts “as rigid” and thus the rebound damping becomes ineffective. With too large Gleitwlöletl itl hma n also occur iw wiOnM hta MUrte that, as already erwShnt the sliding already used in "normal drive of the rotating system.

For the assessment of the target behavior · thin equation ———, the sIgSi from the following

- derive

Here «f _Q 'represents the slip angle.

The Pig 3 shows a rotary armature relay with rebound damping advantageously carried out «ground know * with the through A housing 10 of the concealed swivel armature is a MltneRjttr »iilft 11 firmly connected. If the relay is energized »the driver aaeht * pin 11 a swivel movement la counterclockwise · after completion the excitement returns the anchor old dea NltmthMerstlft 11 for example under the action of a spring in the one shown Position back. When aroused, the coarse stump pokes

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middle contact arm 12 near left into the other · of the two. Bndlagen in. The contacts 13 and I ^ are closed. Without Bounce dampening, it can now happen that when Brrelohen the The endless rotation thanks to prsilungen so sslt surU = kse «srf *! i is that the contacts 13 and 14 are briefly separated again will. This process can be repeated several times. Am a perfect switching is therefore not guaranteed. If the attenuator is correctly dimensioned, however, there will be no bruises and thus no contact separations.

The contact arm 12 is biased so that after completion of the Excitation of the armature relay of the contact arm 12 in the illustrated Lags sureturns and thereby separates the "13" and "1 *" and contact «15 ü *« S 16 wi «wF gs

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Claims (8)

Landis ft Gyr Ά.6, S C E ϋ I Z A 1 S P H E C I I 1, Slnriontuiig sur Rückpralldäepftag for «in rotatable bearings System that consists of two frictional fibers that are connected to one another There is a division, of which one is against a bid and the other is overcoming moved further by the frictional force, characterized in that the moving part (7, 8) has two mutually opposite, with respect to the pivot point balanced HKIften (7), which by an elastic connecting piece (8) against one lying between them, bit of against Stop abutting part (1) permanently connected cylinder (3) pressed 2. Device .according to claim 1, characterized in that that the moving part (7,8) swei approximated has semicircular segments (7). , 3. Device naoh claim 1, characterized in that that the elastic connector is a resilient wire (8) ^iet 7 .A PA 1617 713508723.1Z71 4. Establishment & aeh addressed 3 t thereby gekeimseioiuaet «-. ■ _; · ^ That the resilient wire (8) is guided through holes in the balanced halves (7) 5. Device according to Anspruöh 3 thereby gekesmsaiehnet, that the resilient wire (8) in Muten in the two atiebalai * » egg halves (7) fedgekleeet iet / · 6. Device naoh claim 1 »daduroh gekennselohnet. that the square of the Terhlltnlaass dor polar ■ oaente of moving on toil · (7,8) and des against the stop etoiawnden foils (1) equal to the goalie the atation energy of the bumping against the stop Partly (1) directly next to the "Stoss gozl dos stop Tnd of the general rotatable system (1,7,8) unaittolbar in front of the Butt against the stop is. / 7. Device according to claim 1, characterized in that it that the gleltaoaent of the rope moving further (7,8) is greater than the sjnrlwalo acting on this part (7,8) Drive saoaento / 8. Device according to claim 7, characterized in that the surface of the moving head (7, 8) is sufficiently small for a reliable occurrence of a volter movement near the foot against the stop t »"% y 9 · Device according to address 1 «or one of the claims 2 to 8, in that it hits the stop butting part (1) of the anchor of a Srohankorrelaio ajtffia ys wr ^ l "" * ■