DE1530580A1 - Part-lined disc brakes for vehicles, especially motor vehicles - Google Patents

Description

Daimler-Ben «Aktiengesellschaft ι ς ο η ς pn Daiw 6783/4 Stuttgart - üntertürkheim

ⁿ ! Partly lined disc brakes for vehicles, especially motor vehicles "

The invention relates to a partial lining brake pads for vehicles _f in particular motor vehicles! wherein the brake pad with the lining is guided in lateral slideways and - if necessary via a pressure plate - is pressed against the brake disc by a piston arranged in a cylinder.

With brakes of this type, annoying squeaking and unstable wear on the brake lining often occur. As tests have shown, both are mainly due to an uncomfortable pressing of the "Bre" * klots "#" a 41 "brake disc. The uneven · Anpresstia * int completely imbeherrsohbar and occurs, for example IMMT "buna one if * n by the action of frictional heat Fofwfodftlttiiewfc at <*** ftpMuiftdhelbe -eg a Aufsohlnten derselben- mattrmtm t 3an the comparatively rigid system piston - do not follow Breasklots - pressure Platt · can, furthermore, the brake caliper is spread open during the opening due to its unavoidable elasticity, which also causes an uneven pressure of the brake clamp, which is thereby positioned against the disc.

The invention has as its object _# this laughing avoid parts JGU, It solves the problem is disc brakes of the type mentioned in that the piston and the brake pad or the pressure plate on all sides articulated connection means are associated, welohe an all-round swiveling motion as well as one also all sides Purallelverschiebung Zwlachen ler In the normal case »right on the brake disc level a» tohemlen Bromsklo Kz schv / er * ohö · and the 2ylind «raoliMe 3U.laaB« n,

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The previously β cart system piston - pressure plate - brake pad is now through the articulated connecting means according to the invention become yielding. This can cause the brake pad to » advantageous to the above-mentioned changes in shape of the brake disc and the Breraaaangen as well as any other influencing variables adapt in such a way that the entire brake lining area rests evenly on the brake disc. During the braking process the brake pad aligns itself to a certain extent solely with the disc Pressure is increased when the plow and / or pliers change their shape and / or position.

Another cause of uneven wear, regardless of uniform or uneven contact between the brake pad and the brake disk, has been identified as the linearly decreasing radial inward direction of the brake disk. Naturally, it causes greater wear and tear of the radially outer zones of the dreasbelasse compared to the radially inner areas, tied up tiiiajf gradual oblique division the BreaakiolJSö * "slides" caused by wear and tear can not be articulated by the above-mentioned arflundation joints Connection to be paid out "

I) Le invention aehlägfc jeilosh fürzugBWdläa gate, an ungloirjh-warm wear dso BremabaIaJdIf from / ortiherein to report, namely by arranging and designing the 7erbindingemlttei in such a way that the return puakt on the brake pad opposite dsstn tiohwerpunki; sLnerselt ^ to atwrn 4 to 8 mm inwards, other aal ta by about 2> 1.j 4 ßua long t.lal in Sreiasvchtlb · »« threats at fot-wävtwt & hvt / girasfcat let,

By relocating & »* Oi'uofcmit-tr» lp-mkfci »» na:; h Lauen di # there becomes smaller ^ Ifinfaii ^ ageaüliw.tu-iigkslfe diiraii aliiaa from eufcispreohöiid gröfl ^ ran An]) MH-U ^r . ? jfc 'mfi ^ is ^ l.iviiifjni aoilfa-- • - *> la honiüi ^ iiSi ¹ Ur "λ äbdla ^ - ^ / ^ j tn tofi -ro, \: i'-i: v ^' ^lf ^ ^: - · ^ - * i · ^ ^ l'.loh »50? / ~} ΓΒ · ^:. · ΊιΛ3ΐ * ί i-; i f'-i'.il IL-U 'ίϊϊ aU i«?: I, i, 1 iii-iiSi-ΐΛη iofc, IiIi i κ

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the abatut points due to the distance of the lateral brake block ▼ on the brake disc caused uneven contact pressure in tangential Compensate for direction from the start. Duroh the invention a precisely defined and precisely «u created housing starting position, which then continues automatically raw the hinged connection means according to the invention can be sustained. The latter is in particular when driving backwards Tone of paramount importance because the above tangsntiale Pressure point reset is set to goalkeeper ride, so that without the connecting means according to the invention when reversing Brake lining sole and brake lining in stronger for « would occur.

There are different arrangements for the articulated lanyards Options. Thus, for example, an arrangement of the same swivel cylinders and pistons is conceivable. Preferably sees the invention, however, gate, ds.fi the piston in cylinder in on calibration known way is performed without play and articulated on all sides Connecting means swisohen piston and brake pad bsw. printing plate This design has the gate part, so 4a The piston - pressure plate - brake pad system is designed to be flexible while at the same time providing perfect guidance and sealing of the piston opposite the cylinder wall.

The design of the connecting means, which are articulated on all sides, is in principle arbitrary. However, the invention recommends a simple and space-saving design with the aid of one on each volume bolts provided with a ball joint «all articulated · Lanyard. Hn such a solution can in its dimensions without further ado the structural conditions of a disc brake must be adapted to the type mentioned at the beginning, and is above that It is also easy to install and remove, and the above can also be used Druokmlttelpunktrersetsung in simple catfish on swei On the one hand, the bolt in the above-mentioned position can be arranged parallel to the cylinder axis. On the other hand, it is enough already such a kinking of the bolt, AaB that of the piston

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β time facing the bolt * eioh in the cylinder center is «while the bolts facing the brake disc * opposite the cylinder axis or Piston aohee dta wished Has distance.

The design of the ball joints - basically at the discretion of the designers - is again primarily among the From a manufacturing and material cost point of view as well Space requirements to be considered · As a particularly simple and practical solution, the invention suggests that the bolt should each end itself is spherical and in corresponding spherical recesses on the one hand the piston « The end face, on the other hand, of the brake pad or the pressure plate is supported each rom bolt and the joint socket on the one hand clay pressure plate or «brake block» on the other hand from the piston face This allows a particularly small distance between the parts connected by the bolt.

To keep this distance constant * u, i.e. to ensure an axial relative movement between the joint head and socket rermeiden and daduroh also at the same time a connection to the duroh to ensure that the bolt is tied up Tor »dafi in ring grooves of the opposite indea of the spherical recesses, three-cornered detachable · clamp locks are arranged whose circumferential diameter is smaller than the spherical resistance value of the bolt ends.

Except for the training described in detail above «The all-round articulated lanyards are self-supporting Other solutions are also conceivable based on the invention for example in a further embodiment of the piston even a part of the all-round articulated connecting means, with play against the Z / linderwand and around his Diohtungakanten is pivotable. The piston thus forms Gewiesermaien the one joint of the door, which is articulated on all sides, »induag · - medium, while wiping according to the invention as the second joint Piston and brake pad or pressure plate is arranged in a ball, which is eioh in corresponding ball sockets on the end face the piston and the brake pad or pressure plate.

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This execution forum is advantageous in an axial Direction very ff "urged and space-saving training dt" Systea " Piston - pressure plate - Breaeklots, including the piston «week» is moderately very flat.

As a modification of the last-mentioned version, "form suggests the Invention also goal that the piston itself has a spherical surface on its end face, which is in a corresponding Ball socket sjb brake block bsw. supported on the pressure plate this creates a further improvement in terms of the flat design

The drawing shows examples of implementation of the invention, and «was inclined

fig «1 is an embodiment of a disc brake Longitudinal section (partial),

* 2 a section along the University XZ - II in Iig.1,

"3 other« versions »also 1» long cut ^{u #} * (partially).

In the embodiment of Figs. 1 and 2 there is an actuating cylinder 10 bucket disc brake one piston 1t play-free and duroh pressure medium support axially arranged so that it can be slid across the surface Piston interior geιοgeη and has in the putty · «la · spherical Recess 13, in which "loh" la also spherical band a lolsens 19 and «in ball joint forms · the other« spherical bands 16 of the bolt 15 is accordingly la one Recess 17 of a pressure plate 18 articulated on all sides, which is located on the side of the piston face 12. of a Breasklotsea, not shown in detail, is · Si «is adapted to the contours of the piston and partially protrudes from this (11) inside.

The bolt 15 is inclined in the normal position shown in Figure 1, aodai the pressure center point F in the recess

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17 around the Batrag χ- aua the middle 19 the pressure plate 18 is shifted “the figure shows the shift in the tangential direction” to which - as described at the beginning - there is also an additional radial inward direction ”The brake pad 23 indicated at the side supported and guided at points 24.25. the bolt is secured by eind Fig.2 by dreieokföraige löebare Drahtkleaaen 2O _V which respectively in annular grooves 21 or · 22 in the piston 11 "arranged in the pressure plate 18 and 15 whose Innenkreiedurohaeaaer let smaller ala Durchaeaser of the spherical bolt ends 14 * 16th

Piston 11 is old of the pressure plate 18 and the Bremeklotz 23 a system which · by ron the bolt ends 14 »16 and the spherical recesses 13,17 formed two ball joints receive an all-time compliance eodaß the Breasklotzaohse 19 relative to the cylinder axis 26 ron the illustrated Auegangspoeitlon is on the one hand parallel displaceable, on the other hand pivotable.

In the Aueftthrungafora according to Fig * 3, the piston 11a faces opposite the cylinder 10a play on and is, among other things, the edges 27 »28 of the Seal £ 9 can be pivoted. Between piston 11a and pressure plate 18 ″ a ball 30 is arranged, which is an all-round Sohwenken the pressure plate 18a relative to the piston 11a shape » Bins parallel displacement of the Bremsklotzaohse 19 compared to the The cylinder axis 26 is in this execution fora by a Sohwenken the piston, among other things, the Diohtungekanten 27,28 at the same " early pivoting of the pressure plate 18 ″ relative to the piston 11a causes

In the embodiment according to FIG. 4, in contrast to the embodiment according to FIG. Speaking spherical formation 31 of the end face of the piston 11b replaced · Here - as well as in the arrangement according to Fig.3 - is the piston is as flat as possible. On the one hand, this saves space and, on the other hand, the necessary SohwenkBoatnt reduced, so actually also the intended one Division of the block near the disk without great forces can be done.

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Claims (1)

Ansprttohet ^ Partially lined disc brake for driving fidelity *. in particular motor vehicles, the brake pad with the lining in eeitliohen slideways is carried out and, if necessary, via a pressure plate a piston arranged in a cylinder is pressed against the brake disc »characterized in that the piston (11,11a, 11b) and the brake pad (23 * or the pressure plate (18, 18a, 18b) are associated with tying means (15, 30) articulated on all sides, which have an all-round pivoting movement as well as an all-round parallel displacement between the in the anterior case The brake pad hub is perpendicular to the plane of the brake pad (19) and the cylinder axis (26). Partly lined disc brake according to Claim 1, characterized by such an arrangement and design of the binding means (15 * 30) that the Bruokmittelpuakt (?) on the brake block (23) compared to its center of gravity on the one hand by about 4 to β mm radially inward, on the other hand by about 2 to 4 «a tangentially in Brem · - zoheiben-Drehriohtung for goalkeeper movement is replaced. «, Partially lined disc brake according to claim 1 or 2, characterized in that the piston (11) in the cylinder (10) is generally known per se Catfish is guided free of play and the all-round articulated Terbindmittel (19) between the piston (11) and the brake pad (23) or pressure plate (18) are arranged ^ Partially lined disc brake according to claim 3 characterized in that then articulated on all sides "Terbinduagemlttel one on each inde (U, 16) provided with a ball joint rereehener bolt (15) is. Partly lined disc brake according to claim 4, characterized! that the bolt (15) on each band CH, 16) is spherical and is supported in corresponding spherical recesses (13, 17) on the one hand on the piston face _f on the other hand of the brake pad (23) or the pressure plate (18) 909840/0631 _BATH 6 · Partially lined disc brake according to Anapruoh 5 »thereby marked · net, dafl for aIna sugar connection dar by Bolsen (15) rerbundanan Tail · (11,18) in annular grooves (21,22) opposite » lying ends of the spherical recesses (13t17) dreieokföraige releasable klaaaialoharungan (20) are arranged thereon Circumferential Durohmesser dea Bingnutdurohaesser enteprioht and on it Inner circle diameter diameter smaller iet al "represent spherical diameter diameter Bola ends. 7 Partially lined disc brake according to Anapruoh 1 or 2, daduroh gakanneoiohnet, that the piston (11a, 11b) eelbet a hawker on all sides articulated connecting means and dad ar against the cylinder wall aufweiat play and around aeine Diohtungakanten (27,28) pivotable iat. 8 Partially lined disc brake according to Anapruoh 7, daduroh gefcennseiohnat, dae two pistons (11a) and brake pads (23) bsw. printing plate (18a) a ball (90) is arranged, dia see in corresponding Kugelpfaanen on aar end face of the piston and aa brake pad (25) E.g. the pressure plate (18a) abatutst. 9. Partly lined disc brake according to claim 7, daduroh gekennieiohnet, dae Avt piston (11b) anoints on its end face a spherical surface (31), which see in a corresponding ball socket em Iremskloti (23) bsw. abettttst on the pressure plate (18b). 909840/0631 Blank page