DE1934249B2 - Hydropneumatic shock absorbers, in particular single-tube shock absorbers for motor vehicles - Google Patents

Description

5. Shock absorber according to one of claims 1 noises that affect the driver and also up to 4, characterized in that affect the ball damping behavior,
Cylinder tube end (1 ″) drawn in like a socket The object of the invention is to create a sealing cap known per se for a shock absorber of the type mentioned at the beginning to act on the ball joint surfaces, the ball joint bearing of which the fastening means is attached

at the same time constantly even with a long period of use

works axially backlash-free.

The invention relates to a hydropneu- This object is achieved in that the inner

matic shock absorber, in particular single-tube shock 50 ball joint surface to one in the damper cylinder damper for motor vehicles, with a damper-axially displaceable ball head piston, which belongs to the piston rod outlet at its end, which is provided with a circumferential seal and opposite end has a ball-and-socket joint through the pressure in the damping cylinder Has fastening pin, which is constantly on its gas against the spherical shell and the latter against inner end is provided with a ball socket, which presses 55 the outer ball joint surface, and that this between a correspondingly shaped outer, from the outer ball joint surface of the kugelpfannenar damper cylinder is carried and formed between an intimately retracted cylinder tube end. at neren ball joint surface is arranged. In all installation positions of the shock absorber, it can be

Known shock absorbers are attached to the ball-and-socket mounting of the fastening pin be pivoted with a screw thread or mounting pin 60 so that on his equipped with eyes, through which there are practically no radial forces acting with the vehicle travel piston rod. stell or the wheel axle. Due to the internal pressure of the shock absorber, the But shock absorber mountings tend to be so tightly pressed against each other that ball joint surfaces Already after a relatively short period of use, the damper mounting always has no axial play permanent axial play occurs, which is guaranteed to undesirable 65.

Noise leads. One therefore has the fastening- The spherical head piston has a hat-shaped

supply or connection points of the shock absorber on the cross-section, so that a substantial part of the required vehicle also already with rubber pads or inserts of the same compressed gas volume in the interior of the

yl 934 249

\ _u el like a thread

gel head piston can be accommodated. That shaped, ^^^^^ ΐηά ^ η ^ οτ. Pressurized gas acting on a spherical head piston is surrounded in ^ S ^en , f _nn ^ ™ To, which is immediately guided in the Dämpzyeinir underneath the spherical head piston, housed with a circumferentially arranged cylinder chamber, so that linder ^^ ~ Jo ^ _ges 11 provided and the , but _is by the to-° * _b * _aufschlagt ball head piston is not only the inner ball joints 5 in the form of seal applied ^^ J ^ ₂ located guide surface of the spherical shell. This also seals the cylinder chamber. ? SfelSSolben 10 always firmly against the inner

To the mobility of the mounting pin in the ^K lschale »8 ^ ™ ^ 5 _Kuge 9 and the latter gekugelpfannenartig retracted cylinder tube end ^ dgelrakfl ^ d '^ | _{Confiscation or the au} . possible to keep smooth and io to prevent pitting the gene ^ ptamwna S. _ckL located at the mutually engaging ball ^ KjgS gliding motility of Kugelenkflächen, the * S% icherSXn, on fastening, ^U £ on the pin 8 pre

ball socket and / or the fefce ^ »A« ™ * elle ^ ^^ ^ engaging ball joint ^{surfaces on ^ and} ^ ÄSch _t 9 'or 9 ", preferably made from the end of the cylinder _{tube or on the ball-head piston in an x 5} ^ unststoff- G ^ tech ^ ity sliding layer

is covered in a known manner with a plastic sliding J ^ K ^ SSdf ^ chm of the inner spherical layer. This is preferably made ^ ™ "™™™ Selkopfkolben 10 and the au-polytetrafluoroethylene To maintain tremendous flexibility |. ^Ele _p ⁿ _n ^k ™ ^s _el ^a - ^m _le 3äche the ball socket-like ness but can also at the same time or on the kugelpfan - ßeren ^K "f ^ Senohrendes 1" available nenartig drawn cylinder tube end an inherently "o ^ confiscation of Yunu

known sealing cap ruling on a ball joint surfaces be Zvlinderkammer 2 Gasbeaufschlagendes lubricant are placed Dn in α y ^ maximum aufin the drawing, an embodiment of the d ™ "Ä ^C _{t beira} retraction stroke of the Ar invention is shown, namely a hydropneumatic ^. ^ , ^ 7 ^^ between the fastening shear, shown in an axial longitudinal section, single-tube- »s J ^" ¹ ^ ⁶ '^ Sipferylinder existing shock absorbers for motor vehicles

The illustrated hydropneumatic pipe joint 8 «8elenK sieo a ν ^ _fastening g _ungsz ap-

The damper is of conventional design as it is easy to move. s ^ e ^ _χ ^ .

he has a damper cylinder 1, a fen I in it, over the υ P ^ _{7 of schad} -

, .. «- ^ ™", _mr n ™ * ",," nH, ine the other 30 such Lyge ^ daBdte _Biegernom ducks

^{divided liquid chamber} 4 and a filled therein axially νεΓ ^% ™ ** - ^^ ^ _druckgasge

Slidably guided, valve-controlled through- _M ^ ® ^ ämofern use, with only through-openings S provided working piston 6 and ^^ f ^^ that the pressure ball has a piston rod 7, which with a corresponding 35 »^ erges ^ l · t ^^ ¹¹ ™ ^ _can . Furthermore, there can be a speaking seal provided end 1 'of the gelen W * ™ Autovermietung ' dte ball joint surfaces instead of damper cylinder 1 penetrates and at their free ^ ° ⁿ ^^, S.ßSages or in addition to this with Ende7 'for example with a connecting thread of an oleit £ ™ ^c ™ ^. L _{sz B.} Grease, to lubricate, is provided for attachment to the wheel, not shown, HiKc of a ^^ ff ^^ JaBrüg einezoachse. On his piston rod 40 ^ ^d ™ ^ «~ J ^ J; _r \ ξ _% damping cylinder 1 outlet opposite cylinder tube end 1 is f ^^ tanpen ^ is sealed on the outside, z. B. the damper cylinder with a mounting pin 8 attached \ ^ ΡΡ? _{ika e the d} he ball-and-socket joint which is mounted in the cylinder tube end 1 "_ ball joint- ^"'^^^ _B ^ festigungsza _{P fens8 opposite tig.} To this end, affected the inner ^BEWE ^ ™ _for X ^S _de ^rie _s j _nic ht. End! of the fastening pin a spherical shell 9 on the steam cylinder

1 sheet of drawings

Claims (4)

Mistake. Such rubber parts must be made relatively tight or hard because of the he patent claims: significant stresses during driving, what 1. Hydropneumatic shock absorber, but in particular to increased bending stresses of the piston special single-tube shock absorber for motor vehicles 5 rod during operation of the shock absorber leads, whereby with a damper cylinder, which at its end opposite the guides of the piston rod in the damper cylinder piston rod exit is loaded on one side and thus on the Duration in their ball-jointed fastening zap- rers durability are impaired. In addition it has, which for this purpose occurs at its inner end in the interposed rubber parts is provided with a spherical shell, which between io a non-controllable damping by additional correspondingly shaped external friction from the borrowed. Since shock absorbers, if they are carried by a damper cylinder and are intended to ensure adequate driving comfort, are arranged on the inner ball joint surface, so that optimum damping in relation to the vehicle is characterized by the fact that the inner ball joint surface has to be matched, this additional ball joint surface has an effect in the damper cylinder 15 Damping through the rubber parts is disadvantageous from, ins- (1) axially displaceable ball-head piston, special also taking into account the considerable (10), the temperature change with a circumferential seal (11) to which such rubber is provided and which are exposed in the damper cylinder layers . Finally, in the case of (1), the compressed gas must always be expected to increase against the latter and always with an increasing embrittlement spherical shell (9) and the latter against the outer 20 manure of the material.
Ball joint surface presses, and that this outer damper is known from German utility model 1 936 353 from which a ball socket-like joint for push-pull cylinder tube ends (1 ") is already pivotable 2. Shock absorber according to claim 1, characterized in that the shock absorber is provided with a spherical shell, indicates that the spherical head piston (10) 25 around the shock absorber among a variety of wines Has hat-shaped cross-section. to be able to articulate tilted positions on the vehicle axle. 3. Shock absorber according to claim 1 or 2, then. A base is used to store the spherical shell characterized in that the ball head of the damper cylinder has a shell-like recess, piston (10) pressurized gas in a in which a loose ball is inserted, on which the immediately below the spherical head piston an- 30 spherical shell of the fastening pin with its internal arrangement Cylinder chamber (2) housed ren ball joint surface supported. The outer spherical spirit the steering surface of the spherical shell is separated by a ring 4. A shock absorber according to any one of claims 1 supported having a spherical inner surface. Thief 3, characterized in that the ring on the beeper is held by a cylindrical sleeve, mounting pin (8) existing ball socket (9) 35 which are attached to the damper cylinder or its bottom and / or the ball welded therewith in engagement. This type of mounting of the fastening hinge surfaces at the end of the cylinder tube (1 ") or at the delivery spigot is structurally very complex Ball head piston (10) in a manner known per se can use the known joint in the case of prolonged operation with a plastic sliding layer (9 ', 9 ") permanent due to the considerable wear and tear or the coated are. 40 wear and tear are knocked out. Hence arise