DE1922855U - AIR SUSPENSION WITH AUTOMATIC LEVEL CONTROL. - Google Patents

Description

RA. 30161 HI. 6.65

Dr. Gustav ΐι / ürth
7 Stuttgart 1
P.O. Box 962.

Description of the air suspension with automatic fire control,

Air suspension systems with automatic level control are already common known. However, they generally have extensive equipment or severely limit the spring deflection, you are lying down Proposal should τοη these well-known leatherings through Distinguish between compactness, simplicity and reliability, while being completely maintenance-free. All moving parts are in a plastic sleeve protected and permanently lubricated housed. The essential parts are:

Ä and M. Cover plate and base plate. The fastening devices are on these for axle and chassis hezw. Structure attached, Swischen both lies the resilient part, the τοη the

B plastic sleeve is enclosed. This consists of a suitably shaped elastic material that can be compressed and is protected against deformation in diameter by reinforcement inserts. In the cuff there is always a required overpressure of a gas or air mixture. The lower part contains the hydraulic fluid (oil), which is also used for (lubrication. Of course, the sleeve can only be limited to the resilient part, so about 2/3 to half of the entire height. The lower part would then consist of a solid material, but the deformation during springs would then be greater.
The sleeve is through against the deck and floor panels A uM

C each one sealing ring. These ones are with the plates firmly screwed with the ends of the cuff in between, which results in an absolutely tight seal. On the upper pressure ring is still an elastic pad attached, which may be Spring down on the circlip G to avoid damaging the pump. The pump unit is inside the sleeve housed. It consists of

D the piston rod, which is movable (cardanic) on cover plate A and F piston is attached. The piston also actuates the two overflow pipes J and K and h / at thereby a certain length,

but for cheap leadership in the

E pump housing is not disadvantageous. The pump housing can be narrowed so that the piston cannot escape from the housing, which z.3. when relieving the wheels (jacking up for the purpose of EeiJen- Wec hsels etc) could otherwise come up. The EoIben F can also be kept shorter. The slots in the pump housing would then have to be served by an additional inner ring, which would have to be moved up by the piston and then down again by spring force. The piston contains the inside

Ix overflow channel. If the normal division of the Eolben has been reached, i.e. If the suspension has the UiTeau as seen by the gate, this will be additional OeI funded by the

J Overflow pipe that reaches deep into the oil bath and is under the pressure of the Gas mixture is available through the overflow channel H in the piston into the

K overflow pipe that leads to the drain in the "storage tank, diverted, until the piston closes the overflow pipes again. The shape of the overflow channel H, as well as the height and arrangement of the Aligns the slots in the pump housing for the overflow pipes J and IC depending on the desired spring deflection, load, etc.

L Is the check valve that changes that under pressure standing oil bath runs back into the flask housing. The check valve in the base plate M allows the pump housing to be filled with oil when the piston is moved upward. When moving down the path to the storage container is blocked by the non-return valve T ·.

After all, G is a kind of safety ring that prevents the Eolben F from being pushed onto the base plate (e.g. when the suspension collapses) and thus deformed. A breakdown is hardly to be feared, however, since the suspension works extremely progressively due to the strong increase in pressure. S \ ^r t »the safety ring can be designed in the form of a hard helical spring,

IvI The OeI is extracted from the Supply container supplied. The storage container is conveniently located outside and is made of solid material. So through the required opening to climb and. If the oil falls without allowing pressure, no dirt can get into the oil Above the OeI there is an all-round sealed membrane with great elasticity be attached.

- 3 -. ■ "

The description of the part essentially already results the mode of action:

With normal load, the tree is inside the cuff B et "? one third with OeI, the upper two thirds with compressed Air mixture filled. The piston is then so that the Slits to the overflow pipes just closed by the piston are. The piston can move freely and with the bowel the suspension go. The oil displacement caused by the downward sliding of the piston is pressed into the cuff space and escapes as far as necessary again via the overflow pipes. Will the suspension loaded by ___load, the cuff is compressed. The piston, which moves with every spring travel while driving, continuously pushes oil from the reservoir into the lower one Kanschettenraum, thereby the oil bath rises, whereby the gas mixture until the set Ii ire au again is reached. When the suspension is relieved (by unloading, etc.) the overflow channel in the piston opens when the piston goes up the «sweep for the oil to escape via the overflow pipes again free until normal is reached again. Any messing up τοη air and oil in the middle Part of the cuff should not damage it and is used for lubrication. Corresponding dimensioning of the non-return valves, provided. through Using a double-acting piston, the function of a shock absorber can also be taken over.

Finally, the plastic sleeve can be telescoped xnexnander-sliding, sealing rings must be replaced, whereby it must be ensured that the sliding surface is replaced by the oil bath is sealed with.

Claims (1)

RA. 301611 * 11. B.B5 Claim to use. Air suspension with automatic level control, characterized by that inside a compressible plastic - cuff (alternatively, telescopically interlocking sealing rings), which is hermetically sealed on all sides and in the upper part with compressed air, in the lower part is filled with oil, a pump unit is housed, the piston of which is actuated by the spring travel and thereby while driving at the spring OeI into the inside of the cuff pumps until the set NiYeau automatically due to pressure increase is reached and where the piston ig. connection With "overflow pipes and non-return valves, a return flow is superfluous Oil is reached in the storage container and being secured against puncturing when springing through a Circlip is given, as well as escape of the elastically attached piston by means of a gimbal-mounted piston rod is prevented from the pump housing by a constriction at the end of the pump housing.