DE1856793U - MOTION DAMPER. - Google Patents

Description

gociett anonymous

Pari a, rue cross 6 a 1: 0

.: · «.«; «: (> Oiesa document (description and Schulzonspr.) If the last submitted! Sla deviates from the word» version ^ Sf originally submitted documents whether, Ote legal deviation of the deviation Is nteht gppH ^. υ * initial filing are in the official files. you can jodorsölr be viewed free of charge Without NfichWi V a legal interest. At the request thereof also FetaKeßlon öfiör FH zy negofive come the usual prices, _._. ^. "^" ^. Peutsches Potentamfri Gebrauohsmustersteli &,

'' Motion damper

The price increase affects the motion dampers, their EoIT the two Groups of channels and on each end face a valve element, which each control a channel group so that the oil or a S another damping agent .in one. Movement planning through the one and in the other through the other group of channels flows.

The EoITden and the cylinder in which the EoITden slides are usually not made of the same material, so that they can have very different thermal expansion coefficients Aluminum, very advantageous, while the cylinder should be made of steel. Under the most unfavorable conditions of use, the heat corresponding to the energy absorbed by the motion damper can bring the temperature of the damper to a temperature about 150 ° G above the ambient temperature To prevent this at these temperatures, a relatively large clearance must be provided between the piston and the cylinder at the ambient temperature.

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(. »The big game in a cold state then allows an undesirable

j th passage of the fluid between the circumference of the piston and the cylinder wall. One must therefore at least one

ι envisage benring in a lut of the piston in order to ensure that the correct «

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j The movement damper must work at a low temperature Ensure sealing.

In the case of a piston of the type under consideration, however, the possible " in the saw of the circumference of the piston not to be attached channels always the formation of a lut that is deep enough to accommodate a standard piston ring made of 6 iron cast iron. "A piston ring made of cast iron must have a relatively large thickness, in order to be able to meet the "operating conditions"

According to the innovation, it is used to seal the channels provided Piston of the type described, a piston ring made of a special one low-friction alloy on aluminum and tin bases or made of a plastic. Rings made from these materials have the. Gate part that they are mechanically γ / id he stable even with a small thickness, therefore only require a hat of very shallow depth »

lin embodiment of the furnace is below with reference to the 'Drawing described in this show?

Mg. 1 a longitudinal section through a motion damper, whose piston with a piston ring according to the Hiring is equipped and

* 2 part of the section according to S ¹ Ig. 1 on a larger Saßstab which can detect the position of the piston ring with respect to serving cylinders and the hat of the piston. '■

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In lig. 1 denotes 1 the cylinder of the motion damper a, in This slides a piston 2, which is attached to the end of the piston rod. This is shown on its lower part with nioht Arms connected, which on the chassis \ and on the brackets of the Achssohenkels of a motor vehicle wheel are articulated.

The piston 2 contains longitudinal channels, which are divided into two groups 4 and 5 and arranged on a circle equiaxed to the piston. These channels are as close as possible to the circumference of the Kolbensy as shown in the drawing. Flexible metal washers or foils 6 and 7 are used to alternately open and close the channels. lying on both sides of the piston 2 on the. Rod 3 are attached. The 3? Olie 6 contains the channels of the group 4 gleichaohsige openings 8 and the foil 7 coaxial to the channels of Group 5 openings 9 »! Therefore! Films .: control the openings -this channel group so _s that the group, the flow through the Oil or another damping means in one direction of movement and group 8 allows the oil to flow through in the other direction of movement of piston 2.

Arched panes 10, 11 serve as abutments for the foils 6 ₅ 7 9 e.g. All ropes are fastened by a nut 12 _S which is screwed onto the threaded end of the piston rod and presses the said ropes against a shoulder 3b of the piston rod 3. These disks 10 and 11 limit the deformation of the foils when they are lifted the oil. ·

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The cylinder 1 of the motion damper generally consists of Steel, the piston 2 mostly made of the so-called "zamak metal", an alloy of zinc and aluminum, possibly with a small addition of copper and magnesium, among the hottest Conditions of use of the motion damper, e.g. ".B" for the, Driving on an x ^ i / elligen! Lane; causes the one recorded by him and energy converted into heat an increase in the temperature of the motion damper, which is t50 ° G above the ambient temperature can lie »

The difference in thermal expansion is efficient in "zamak" and

-6 Steel is in the order of magnitude of 15-10 "For a piston of z" Bo 36- mm in diameter, with a temperature rise of 10O ⁰ C above the ambient temperature, the difference in expansion is am

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outer diameter 54-10 mm, i.e. 54 ffiikron. If you also take into account the ovalization of the piston, the usual tolerances in addition to the calculated difference in thermal expansion, a clearance j of around 50 / 1.00 for the diameter gauge or 0.075 mm In the cold state, a piston ring arranged in a section of the piston must be provided, in order to ensure the seal, ie the correct operation of the motion damper in the cold state.

But as mentioned, channels 4 and 4 are fun. 5 very close to the circumference of the piston 2, so that, in order not to weaken it dangerously, a hat 1J cannot be formed in it, which

is deep enough to open a common cast iron ring, which, as is well known, must be relatively plank in order to be sufficient to be firm. A piston ring 14 is therefore made in this hat a low-friction metal based on aluminum and tin or made of plastic, 2, B. one known under the "camouflage" "Iyloii" Superpolyamide, used “Such a piston ring requires only a relatively small thickness for sufficient strength.

In a flask with the one mentioned. A ring groove with a depth a of approximately 0.6 mm is then made in a diameter of 55 μm, in which a piston ring with a thickness Jd of approximately. o "5 mm is used" - This piston ring is arranged in such a way that it lies against the wall of the cylinder 1 when it is cold, so that, taking into account the play of 0 "075 am. based on" the radius, the inner edge of the piston ring in a distance e_ of 0.175 mm from the bottom of the Fut »If ^{the temperature is 150 0} G above the ambient temperature, the play jj, decreases, and since the expansion in the thickness direction b is negligible, this distance α is practically equal to 0.1- 3 mm "

The piston ring 14 prevents the undesired passage of oil or other damping means between the side surface of the Piston 2 and the wall of the cylinder 1 in particular when cold of the motion damper.

When the piston ring is made from "ifylon", the elongation is in The direction of the circumference is relatively large and is of the order of magnitude 2 mm. Ss therefore becomes a this in the cold state Adequate play is provided to allow for elongation. _G_

Claims (1)

RA. A1136e * 2B. B. - 6 -. ■■ '. ■■■■' Protection claim ι Motion damper, whose piston is provided with channels that so close to that. Piston edge lie that an insertion groove of sufficient Depth to accommodate normal sealing rings no longer on the circumference of the KoITden can be accommodated? especially motion dampers, whose piston and cylinder have widely different thermal expansion coefficients have, characterized in that in the lateral surface of the Piston (2). a shallow recess (13) formed and in this a piston ring (14) made of an aluminum-zinc alloy or of to the
a Sup er ρ ο Iy ami d ₅ ζ.B. / known under the lfamen "liylon" Material is housed ..