DE1936210A1 - Elastic coupling between mating components - Google Patents

Description

Dt IUIMITH JUNO DK VOLK »VOItIUt DIW.-INO O CCXDiWIY

MTiNTANWXlTt I Munich JJ, Ommm ». H

Afford. Μ »tf

u.z. 453 + a (S & r / Cy) S 3313 / qp

SOCIETA APPIiICAZIONI GOMiIA ANTIVIBRAiOTI "SAGA" S.p.A., Milan, Italy

"Elastic coupling between pairs Components "

Priority: January 28, 1969 / Italy Registration Sr. 12O77-A / 69

• "■

The invention relates to an elastic connection which is mutually compatible or can be fitted to one another Components, never a pin and a component having an eyelet with the help of an elastic coupling that a Gumnihülee comprises, which between two im essentially rigid sockets is arranged, the

009831 / U S

Coupling between the zuannenpaaeenden component added is.

With such connections it is known that the Gximmi sleeve is strong in the radial direction between the sockets be biased to counteract the resistance of the components To increase signs of fatigue »Zwetcmäseigerweise will this preload achieved by ur diameter of the outer sleeve prevented by stretching or, if that is not possible, the diameter of the inner sleeve through Honing enlarged v / irdo

Bs is also known that the preload thereby can be achieved that nan presses a Gunni sleeve between two essentially rigid bushings, which in unloaded Condition has a smaller inner diameter than the inner sleeve and a larger outer flow than the outer Bush “However, these procedures require special tools and the resulting object must be machined in order to achieve tolerances that are slight for a normal interference fit in the seat into which the coupling is pressed are enough «,

The object of the invention is to provide an elastic coupling with high resistance to fatigue _β

Another object of the invention is to provide a To create elastic coupling that with simple equipment, for example üit a flywheel pressθ in a a component having an eyelet can be used, whereby the need for special tools is avoided «,

According to the invention comprises a flexible coupling for use between matching components, both

0 0 9.8 317 1456 '

OAt *

ORIGINAL

In all cases a pin and an eyelet Component, a crunin sleeve, the epic two essentially, rigid bushings, the inner club of which is made of metal iot, is radially pretensioned «, the elastic coupling according to The invention is characterized by the fact that the rubber sleeve is adhered to the inner socket, and that the outer mechee made of plastic "and has a larger outer diameter than the diameter of an eyelet in a component, in which the clutch · takes up) ar, with a reduction deo diameter of the outer sleeve and also of the rubber sleeve provided when the coupling is inserted into the eyelet.

The plastic for, the outer socket is calibrate preferably around a polyamide ο

The rubber sleeve is preferably attached to the metal sleeve by vulcanization, the sleeve being so designed is that they are pressed into her ^ into the outer Unetstoffbuchse relieved

To the use of a funnel-shaped tool! to avoid when the elastic coupling in the the eyelet having component is pressed in, is the Kundststoffbuehse preferably in the circumferential direction with a bevel formed at one end of the outer side,

The invention and advantageous details of the invention will be explained in more detail below a Ausführungsbeisriels anliand of schematic Seichnungen.

1 aeigt an axial section through an elastic Coupling according to the invention, which is received in an eyelet having the component;

Figo 2 Geigt an Asial section through the elastic

Ö09831 / H56

OHlGiNM.

according to 3?: lgr U

■! Pig «, 3 Tie a /.xialßchm tt through a metal sleeve, au ;? clic "1? ig pjeiornte GumailiülDo, - as never in the JCuprlung gerüß elG ^ 3? if iv · en * and 2 used if; t, aufy.il} ■: an i; ι: ierti π t;

4 shows an asial section dux-cLi or polyamide-'JGG, as it is in the coupling according to FIG . is*

In the AuBfuhrungstibpiel shown in the drawings, a γ / ιγ, .-, ϊϊι.οΙιο connection 1 comprises an eyelet aufv / cisenden component 2 rnd eive elastic coupling 5 (Figo 2), which is in an eyelet 2r. be incorporated into component 2 does not eat ₀ A here geBsi / jter Btift lzz.rr _L aufgenonmen in Lxirplxing, un the complete "

j ^ ie Kupi Is ■. '> 5 times. an inner metal sleeve A _} on de · "a ^, e: CuJ: .rce G'JimiJxälse 5 by vulcanizing aaftßud an _f ^r ; ⁽ 5" b: .- rc: v !; itvl _t as well as an outer sleeve 7 made of plastic

The sleeve 5 is zylindriscli and has sits in Aiialschttitt as Figc 3-33i £ t * a generally trapezoidal "shape in iu-Lben longitudinal section \ 7obei the gro ^ e- Baeis of the trapezoid on the A and li'stallbuclise] riirr, or is as the same = two inte. ^ r? Ie 'extensions 6 at the ends of the sleeve 5 eef / äbrleistcn "that the sleeve is the same length as the socket 4-

■ The -B'-vohse 7 consists of a polyamide or a .other plastic with similar ph ^ Dilr ^ liochen and mechani t-.jid has at one volume of its outer surface

009831 / U56

ORIGINAL

"in the circumferential direction a bevel B _o

In the AuoftihrvingeböiBpiel shown here, the Hole in the socket 7 before the Eusaminenbau a diameter of about 27 mm, and the maximum outer diameter of the rubber sleeve 5 before assembling is about 32 ram »at the first In the assembly stage, the sleeve 5 and the sleeve 4 are inserted into the sleeve 7, and in this step the nut The diameter of the rubber sleeve is reduced by at least 5 tins, since the wall thickness of the socket 7 is chosen ao that the diametrical expansion of the socket 7 as a result of the insertion of the sleeve 5 is very slight and was only about a tenth of a millimeter

The insertion of the coupling 3 into the eyelet 2a in the component 2 is facilitated by the bevel 8 in the circumferential direction, which extended at an angle of 30 ° to the axis of the coupling In practice, the chamfer 8 sets the outer diameter of the extreme end of the coupling 3 to a value down, which is slightly smaller than the diameter of the eyelet 2a in the component 2o. This arrangement makes it possible to Bringing clutch 3 into component 2 in a press fit without that any special tools are needed. During this insertion the bushing 7 is radially and elastically compressed, and the internal stresses thus created in the socket act in the assembled joint as a radial force, through the action of which the clutch 3 in the eyelet 2a is wedged «, the sleeve 5 is additionally to the original compression produced by the pressing of the sleeve into the bushing 7 radially inwards pressed together, so that during normal operation there is no risk of the rubber sleeve 5 becoming damaged as a result of material fatigue between the sockets 4 and 7 loosens.

009831/1456

SAD ORIGINAL

From the two consecutive pre-tensioning processes, who experiences the sleeve 5, the erote is decided the more important one. While inserting the sleeve 5 into the socket 7, the diameter of the sleeve 5 uu about 5 now reduced is, when the coupling 3 is inserted into the eyelet 2a Diameter of the bush 7 and consequently the diameter of the sleeve 5 only reduced by a little more than 2 "

Usually the first and more effective operation will be Executed by manufacturers where necessary tools are used Are available, while the weaker later process can be carried out by customers without any special Equipment would be needed

The resistance of the elastic coupling according to the invention against signs of fatigue exceeds the counter- stand of known elastic couplings, which only through. Press site, since the solid Gunai metal connection between the sleeve 5 and the inner sleeve 4 enables the coupling to withstand high torques without any relative movement between the Gumai sleeve and the inner metal beech.

009831/1456

BAD ORJGlNAL

Claims (1)

Claims 1.] Flexible coupling for use between
Matching components, for example a pin and a construction having an eyelet or an insertion opening, with a rubber sleeve which is radially pretensioned between two inner sleeves, of which the inner metal is made, characterized in that the gumai sleeve (5 ) on
the inner buohee (4) is adhesively attached, and that the outer buohee (7) is made of plastic and has a larger outer diameter than the Durohmeßer one or in the component (2) _p the eyelet or opening (2a) / iT aim the coupling (3) can be accommodated, whereby the diameter of the outer socket (7)
and the rubber sleeve (5) is also torn when the coupling (3) is inserted into the eyelet or opening (2a). 2. Coupling according to claim I _1, characterized in that the Gunoi sleeve (5) on the Innenbuohee (4) vulcanized i 3. Coupling according to claim 1 or 2, characterized in that the Außenbuohse (7) from one
Made of polyamide. 00 9 831/1456 BATH 4o coupling after one of the preceding tests, characterized in that the Gunnihülee (5) in the unloaded state has a trapezoidal shape in half longitudinal section, with the long basic dee trapezoid the interior socket (4) is attached. 5 β coupling according to claim 4 _f ~ shows that the ends of the Oumai sleeve (5) with axial extensions (6) are formed which are attached to the inner sleeve (4). 6. Coupling according to one of the preceding claims »characterized in that the AuBenbuohs« (7) has a circumferential cut-off at one end on its outside. 7. Coupling naoh claim 6, characterized g β k e η η - marks »that the cut-off (8) eo is selected, that the outer end of the Außenbuohs · (?) has a smaller outer DurohmeoBer than the office knife of the eyelet or Opening (2a). QQ9831 / U56