DE19942308A1 - Sliding strip for continuously variable transmissions consists of bases for the strip or cord-like pulling elements formed of lamella thickness - Google Patents

Abstract

Sliding strip consists of bases for the strip or cord-like pulling elements formed of lamella thickness. The bases extend over neighboring lamellae. The lamella has a recess which extends within so that a steel strip can be radially positioned in the region of the tilting point during strand bending. An Independent claim is also included for a process for the production of lamella of sliding strips for continuously variable transmissions.

Description

The present invention comprises various designs for improving one known in principle ten transmission line for CVT's, as described in the preamble of the main claim.

CVT's (Continuously Variable Transmission) belong to the state of the art as automotive drive concepts Technology, they provide an economically favorable and pleasant driving sensation, future-oriented vehicle drive concepts. More about their designs, functions and Application criteria include the references / 1 / to / 5 /. One of the most important elements of such Transmission is the transmission line, the torque and rotational speed can be varied from Transmits the drive to the driven pulley set. Proven in practice (and already in pre-series vehicles link chains (PIV system) and push link belts (Van Doorne system); please refer to / 6 /.

The present invention relates to design features for the latter type of transmission strands. An analytical investigation of "the mechanics" of this strand system includes / 7 /.

A major, disadvantageous problem with this transmission line system lies in the contact stress between the pressure plates and the endless ones resting on them Tapes. So it is practically necessary that, although only one to two of the commonly used steel strips are sufficient for the strip pre-tensioning would be, a package of about 10 tapes must be used. The cause is apparently a kind of "Dengel effect ", which the lowest or the lowest bands by a specifically high surface pressure on the is exposed to relatively thin pressure fins.

Wear and material fatigue are likely to be mainly the albeit minor ones Swiveling movements of the pressure lamellas as they enter and exit the disc wedge with the resulting relative movements (slides) between the belt and the pressure plate. Such movements are inevitable in the case of the pressure lamella forms of conventional thrust blocks derbands (Van Doorne) occur where in favor of a closed side friction surface Drawstring arrangement arranged far above the lamellar rolling point when the strand is curved is. As a result, the pressure lamellae are subject to the moving support bases, when "fanning out" practically the requirement or the compulsion to slide under the steel strip, or they are subject to but a limited measure of the condition to wrap yourself (from a radial one Position deviating). This in turn causes edge girder stresses. Both are certainly lying harmful effects.

Such a harmful inclination of the pressure slats is also from one expected from a different perspective. Since in the transition area from the frictional pressure lamella bondage in the  Friction disk wedge to the straight sliding strand area and vice versa the resulting force effect on the pressure plate by the friction force in the friction disc wedge is certainly not identical to that Center of gravity in the pushing straight strand area, is in the possible swivel area again a harmful inclination of the pressure plate is to be expected.

The "fanned out" pressure slats also create a polygonal support base for the Steel strip, which is reflected again in edge beam stresses and fatigue strength affects.

Skewing of the steel belts, which is particularly evident when the friction disc inclinations are not optimized for this characterizes occurrence, has a strong edge tension increase and thus also harmful.

As a matter of loss and wear, the relative "wandering" is the mutually supportive pressure lamellae opposite the belt, thereby at this contact point Friction work and additional alternating loads with consequent premature material fatigue are produced become. This phenomenal process of "walking" is in practice associated with wear traces recognizable and also theoretically underpinned in / 7 /.

In practice, all of this results in a limited lifespan for the steel strips. Given the very mature level of automotive engineering and the resulting "expectations" with regard to the life of new series components to be introduced, this shows elementary important component in the currently known version of an unsatisfactory life persist. This is because of its consequence, which is dealt with further below "Continuous execution" also particularly disadvantageous from other aspects.

Another disadvantage of the current thrust link belt designs is also that because of the requirement of the multiple layering of steel strips is a bending stiffening must be accepted, which reduces the efficiency of the elements stressed in train and with the constant bending changes present, the (internal) losses also increase considerably. The Requirement to have to reinforce the band because of its internal losses, or the stratifications too increase is subject to a feedback effect.

In addition, there are further friction losses due to relative movements between the belts other, since when bending "layers" there are generally slips between them, if not these "geometrical discrepancies" are compensated for by material stretching. This topic is very complex, the reality is in between, and thus both effects are present. This is reinforced Loss fraction again certainly because the outer bands in the curvature area loss-relevant gliding inevitably higher tensile stresses and thus again subject to increased pressures to each other.  

These additional material stresses caused by the bending naturally also reduce the "usable" train, whereupon - at least - the requirement of multiple mentioned above Stratifications and arrangements of steel strips compared to what the actual utility train would require.

A major handicap of conventional push link belts is the systemic disadvantage its endless design for installation and removal, which increases when exchanging Assembly effort required. This also requires a greater amount of design effort via CVT's with divisible link chain strands.

Furthermore, the seemingly mature manufacturing technology for the steel strips is more conventional Push link belts are relatively expensive.

The object and aim of the present invention is an embodiment of a substantially known thrust link belts such that the above, in particular by high specific pressures on the The contact point of the pressure lamella belt prevents fatigue and early damage or at least be reduced.

Furthermore, the requirements for the use of high-strength synthetic fibers and metal strands should be met be created, the functional advantages (mainly loss minimization) as well as weight and Save costs. Progressive development results on the synthetic fiber and ceramics fiber sector in terms of strength as well as oil and temperature resistance / 08; 09 / leave advantageous expect future-oriented applications of such tension cord materials.

There are also openable and closable push link belts with synthetic fibers or Stranded metal strands with which the friction disc sets are used when changing the thrust link belt of the gearbox need not be opened.

The solution consists in the embodiment specified in the exemplary embodiments and claims features.

The advantages of the inventive design features go in detail, for. T. already from the implementation descriptions, they are essentially based on the following benefits:

• - By moving the belt support in the area of the pressure lamellar rolling point at Strand curvatures become the inevitably occurring glides, edge support effects and Alternating bending stresses on the tensile cord are reduced, if not completely avoided;
• - Reduction of specific stresses on the steel strips or other strip-shaped ones

Drawstrings and thus increase their lifespan due to their:

• - Widened, rounded tape support bases, whereby edge supports and high spec. Pressings avoided and sliding between the pressure plate and the tension element is facilitated,
• - Broadened side plant bases, whereby high spec. Side loads on braiding elements, in particular on rope-like combined or knitted together and knitted into a flat band Tensile elements are reduced and such "composites flow" is prevented,
• - Uniform wear of the friction parts on the pressure plates and the conical friction discs of the Frik tion gear due to the special design of the widened tension element support bases and Pressure lamella, which enables correct bending or rolling kinematics,
• - Creation of operating conditions for low-loss and less expensive rope-like tension elements preferably made of synthetic fibers or metal strands by:
• - Broadened, rounded support bases for rope-like tension elements, which means edge supports (high specific pressures and strain) can be avoided,
• - The narrow, preferably groove-shaped rope guides prevent excessive deformation (especially the "flow into the width" and the associated partial overstress within the Tension elements; it also positions the individual tension elements;
• - Metal (cross) cleats on rope-like tension elements
• - create favorable support and management properties and
• - enable harmless (low-wear) sliding (relative migration of the train track opposite the pressure plate block);
• - Provide one with the above advantages, favorable for the assembly of the strand assembly Tension element composite;
• - Closing and opening ability of the (pre-assembled) push link belt eliminates the cost-intensive process constructive designs of the friction gear and assembly processes for the Push link belt change,
• - Manufacturing cost-effective and advantageous for the features of the train seat in Pressure lamella block and its all-round fixation on the tensile cord is achieved by:
• - The centrally arranged, outwardly open recesses in the pressure lamella;
• - by the lugs on the pressure slats, which partially overlap the band;
• - Special external locking devices on the openly manufactured pressure lamella above the belt seat in the form of a welded-in web;

From the patent literature / 8 to 12 / there are already endless thrust link belts with tensile cords made of jacketed tension element bundles known. However, these are subject to unchanged conditions the same operating conditions as those conventionally used put steel straps, so that the load and damage criteria mentioned in the beginning apply wisely to them. Certainly, a relatively soft tension element casing is still ver wear and thus more susceptible to damage. It also builds up in the area of curvature due to compression effects on what causes losses. Tension element encapsulation material between the pressures In some of these versions, the slats must have a (longitudinal) elasticity in the pressure slat block effect what runs counter to the prerequisites for fulfilling a thrust link function, because there is a risk of kinking and increased losses in the pressurized strand. Also pose yourself if wear is to be expected on these parts of the system, the function is disruptive and the losses increasing longitudinal lots.

The fact that such contemplated design variants have so far been practically non-existent realized, confirms the above-mentioned problem, if not points to the practical Such concepts are unsuitable.

Push link belt for CVT's Embodiments

Figs. 1 to 4 show a push belt, substantially according to a conventional known from Bearing with two pressure lamella assembly laterally disposed endless steel belt bundles, with the present invention asymmetrically broadened support bases at the pressure segment.

In these representations, as well as in all subsequent ones, the (cross-sectional) profile shape becomes the pressure for the sake of simplicity, the slats are shown symmetrically tapering inwards and thus deviate from the asymmetrical embodiments known in this regard.

In Fig. 1, a section through a group of 3 pressure plates and in

Fig. 3, a sectional view in plan view, pressure plate 1 has a lapped support base 5 for the steel band bundle 7 lying thereon, the overlap extending over the bar segments 2 and 3 . This support base for the steel strips 7 , which is also intended for synthetic fiber or stranded metal strands or braids, advantageously has a concave-curved surface 6 in order to avoid specifically high pressures, especially against "edge support effects" in the curved state, the outer edges are rounded off again.

Fig. 2 shows a strand sectional view (between the pressure plates 1 and 2 ) with the steel strip bundle 7 leading through the pressure plate 1 , with overlying edge portions 8 preferably by laser welding 9 - the technology of which is already in a technically mature user state and economic manufacturing processes enabled - is set. Such pressure lamella designs are particularly provided as "filler lamellae" in order to apply the required pretension in the strand during the last loading of the pusher belt by means of forced insertion (from the inside).

Fig. 4 essentially stylizes the contour of the pressure lamellae 2 and 3 of the group of three, which can be designed on the basis of currently known series designs with two steel band bundles sitting on the side, but the lateral slots 9 by the strength of the overlap 5 projecting into them adjacent pressure plate 1 are increased.

Fig. 5 and 6 show sections of a 3-pressure segment group of a push belt, also with two laterally disposed endless steel belt bundles 16, with a symmetrical widened support base 14 of the intermediate pressure plate 1 for resting thereon endless belt (-bundle) 16.

In FIG. 5, a longitudinal section of a group of three pressure plates and in FIG. 6, the top view, sectional view, pressure plate 11 has a support base 14 for the endless belt 16 , which largely covers both neighboring plates 12 and 13 . The belt contact surface 15 is advantageously curved as described in FIGS. 1 to 4. The support bases 17 and 18 on the pressure lamellae 11 and 12 for the overlap 14 on the middle pressure lamella 11 and the undersides of this overlap 14 advantageously have a contour that is coordinated with one another in such a way that they slide relative to one another when entering and retracting, albeit slightly inevitably Spout in the disc wedge maintain a largely radial even position to each other. For this purpose described more under FIGS. 18 and 19. The rest of the configuration of the printing plates 11, 12 and 13, may also be as described in Fig. 1 to 4, in.

FIGS. 7 to 11 show thrust belts having disposed in pressure segment middle flat-belt liable endless belt, preferably consisting of open or embedded high-strength synthetic fibers or metal strands, with pressure segment versions with both an asymmetric and a symmetric widened support base.

In the case of an asymmetrically widened tape support according to FIGS . 7 to 10, the pressure lamella 21 has a one-sided flap 24 which largely covers the neighboring lamella 22 . Since tapes 26 made of synthetic fiber or metal braid with embeddings made of flexible materials are subject to deformation tendencies in the event of tensile loads in the area of curvature as a result of the radial loads then acting on them, which means that an increased risk of wear on their side system must also be expected. the lateral contact or contact surfaces are widened to reduce the specific side loads of the belt. For this purpose, the pressure lamellae 23 have side guide tabs 27 which protrude into a space 28 provided for this purpose in the neighboring lamellae 21 . In this way, a lateral guide assembly of neighboring pressure lamellae is produced at the same time, as well as a radial fixation of the pressure lamellae with one another.

Fig. 11 is an illustration showing a symmetrical widened belt support according to the invention in plan view. Here, the middle pressure lamella 30 has a belt support base 31 projecting over both neighboring lamellae 32 , 33 (on both sides). The neighboring pressure lamellae 32 and 33 protrude with their side guide tabs 34 and 35 into a free space 28 over the middle pressure lamella 30 of the 3-way pressure lamella composite.

The pressure lamella contour in FIGS . 9 and 10 with its open space 36 open to the outside allows a (also lateral) flexible band 26 to be threaded by arching into the space 36 of the pressure lamella 22 , 30 which is open at the top and provided for this purpose. At the final filling of the strand, in which a prestress required in the longitudinal direction of the thrust link belt in the pressure lamella composite must be applied in the already largely full belt, pressure lamella designs appear with outer webs to be welded in only after installation according to FIGS . 2 and 13, for "wedging into the largely finished Association "advantageous. As "end lamellae", pressure lamella designs that are threadable from the side, as are already known from / 08 and 11 /, also appear suitable. To ensure correct bending kinematics between pressure plates with widened belt support and their adjacent pressure plates covered by them, FIGS . 18 and 19 are discussed.

Fig. 12 to 17 show a further embodiment of a thrust link belt with an endless belt arranged in the middle of the pressure lamella composite made of high-strength, preferably embedded or forfeited synthetic fibers or metal strands, with a symmetrical widened belt support base.

Here is in a recurring sequence, for example, as shown on a medium pressure lamella ( 40 ) of a group of three pressure plates 40 , 41 , 42 on both sides of the neighboring pressure plates 41 , 42 largely covering support and guide part 43 is used, which is both a domed Tape support base 45 , and side support base 46 . This part is because of the advantages described in Figure 2 by means of laser welding at points 48 a, b; 49a, b with the pressure plate base body 40 firmly connected. A web 50 is also welded in by means of welding points 48 for the external, radially acting fixing of the pressure lamella 40 to the band 44 . The covered neighboring pressure lamellae 41 and 42 covered by the widened support base 43 have lugs 48 on the outer edges, which enable readial fixation and “threading” of the band as described under FIG. 12.

If necessary, to generate an internal band tension, as before described, "filling lamellae" used.

To ensure correct bending kinematics between the pressure lamellae with the widened belt support 43 and the adjacent largely covered pressure lamellae 41 , 42 , what is dealt with under FIGS. 18 and 19 also applies here.

Fig. 16 shows a neighboring printing slats covering, on or inserted support and guide member 43 for flat belt-shaped tension cords with an arched upper band support surface 45 and side guide bases 46 and a lower lateral support base 47 to the neighboring printing plates. This is preferably welded to the pressure lamella 40 by means of laser welding.

Fig. 17 shows a further attachable support and guide part for individually guided, rope-like tension elements. Its base body 53 , which is seated on a pressure plate raised for this purpose - in relation to the neighboring pressure plates - by means of a longitudinal groove 54 on the inside of the strand, has curved guide and support grooves 56 for rope-shaped tension elements. The lower support section 57 is also advantageously provided with the contours described under FIGS. 18 and 19.

FIGS. 18 and 19 show another embodiment of a push belt with a Zugelementestrang of juxtaposed, individually guided endless high-strength synthetic fibers or metal cables resting on widened, several pressure segment covering support bases, with a special contours forming the Pad, supporting and Wälzbasen to improve the bending and swiveling kinematics of adjacent, mutually overlapping pressure lamellas.

Although the production of endless ropes from metal strands, especially with relatively thin, flexible bends Explanations because of the reasonable current requirement of "splicing in" the beginning and - Laser welding (with their sharp and tightly bundled and directable energy beams) of the individual wires Positioning methods and alternatives for highly flexible, metallic endless ropes. Based on this put tension elements could be used in the present embodiment.

A arranged in a recurring sequence pressure plate 61 a with its friction plates adapted to the friction disks of a friction gear 62 has attached to it a neighboring plate 68 a and 68 b largely covering support part 63 a with embossed grooves 64 for supporting and guiding the rope-like tension cords 7364 . This can advantageously also be connected by means of laser welds 66 , 67 to the base plate 61 of the pressure lamella. The outer (radial) fixing of the pressure plates 61 to the tension elements 73 is carried out by a web 65 , which is preferably also introduced by means of laser welding 66 . For these endless rope band designs with a rope support and guide lugs 63 , other pressure lamella designs, such as. B. under Fig. 9, 11 and 15, are used.

19 (compared to the other) on a larger scale in FIG. 19, the pivoting kinematics of the pressure plates can be better illustrated and the claimed "precaution" against uneven wearing of the pressure plates in the disc wedge can be seen.

When designing the support and guide piece 63, it is initially obvious, as shown at position 61 a, to form their inner (in the illustration lower) support surfaces and the supporting bases of the neighboring pressure plates 68 a and 68 b straight and at right angles. In the straight, free strand strand, these contact surfaces lie well and parallel to each other. In the curved state, however, as can be seen at item 68b, these contact points stand out from one another, at best an edge carrier 70 is retained which does not provide any fatigue strength. This means that, in the curved state the radial association of the adjacent Drucklamel determined by the frictional contact with the friction disk len 61 a is disturbed to 68b and 68c, whereby different, albeit small radial displacements of the Reibpartie 62 of the pressure segment occur at the Reibkontur of the transmission Reibscheibenpaares can. The result is - due to the wedge structure of the friction parts assignment - an uneven friction in the disc wedge - in the worst case, a complete failure of individual pressure plates on the power transmission. (In this context, it should be pointed out that friction irregularities caused by this, or at least feared, have nothing to do with the different laws / 06; 07 /, which are constructed differently via the wrapping arc). To avoid this disadvantageous effect, the contact area 72 points out of the support and guide piece 63 c and the contact area 71 , as well as the pressure plate 68 d covered by it, such a contour that when the pressure plates are pivoted towards one another, with adjacent pressure plates coming closer within their innermost system and pivot base, the radial assignment of these Adjacent pressure plates, and thus a uniform friction force formation and transmission in the friction disc wedge is maintained. In principle, this is achieved in that the radial ventilation effect is compensated for by the compression of the pressure lamellae in this area when bending through corresponding curve shapes of the support parts. A general, or generally applicable, specific embodiment of such devices cannot be given as a blanket, since various parameters, such as, for. B. the radial position of the pivot point to the radial position of this lot, force-dependent influences, which in turn are influenced by the radial position of the frictional center of gravity in the disc wedge, or elasticities of the element and parts involved determine these configurations.

Fig. 20, 21 and 22 show a push belt with a disclosed to be manufactured to an endless lockable tension element, in the substantial consisting of a flat belt-like train elements union of rope-like, preferably sheathed tension elements, with it axially loosely mounted pressure segment.

Positions 80 , 81 and 82 form a group of 3 pressure plates, the middle pressure plate 80 being a widened support base 83 for the tension element flat composite 94 with its individual rope-like tension elements 95 a, b, largely covering the neighboring pressure plates 81 , 82 . , having. In the present illustration, the tension elements are embedded in a flexible mass in the manner of known flat belts, but they can also be arranged individually or in a bare woven or knitted fabric combination. These tension elements 95 pass through the open strand length at least once, preferably several times, looping at the strand ends. are eyelet-shaped so that they can be connected with a bolt 86 . Advantageously for production, warehousing, transport and for assembly handling, the loop-like strand end formation wraps around sleeves 87 . In the area of this closure base a bare tension element guide without Umman telung is advantageous. To the locking bolt 86 all traction elements 95 a, b. , , , largely tangential to lead to a frame-like cord lock 89 , which has plug-in and guide bases for the bolt 86 , 95 "hold-down device" 90 is placed on the respective side of the pulling-in and out pulling elements. In the strand end area of the band 94 there are furthermore appropriate tension element spacers 96 a, b for laying and bundling the tension elements - in order to rule out an uncontrolled harmful warping of the parallel tension element guide which can be caused by tensile forces. .; 97a, b. , , arranged, e.g. B. in the form of hook-shaped spring steel elements within the tension elements composite 94th Furthermore, especially with embedded strand elements to maintain the surface-like strand shape at the strand ends - especially since the strand travels beneath the laterally arranged lugs 92 of the pressure plate base body 80, particularly in the critical situation in this regard, when the curving strand end enters the friction disc wedge of the friction gear must be ensured, transverse and longitudinal stiffening elements 86, 87 98a, b. , .; and 99a, b. , ., Arranged, which in turn preferably consist of spring steel wire. In order to give the lateral end parts of the tie rod a certain dimensional stability, these transverse and longitudinal reinforcements are connected by means of an appropriate braiding method. The transverse stiffeners are more rigid than the longitudinal reinforcements. The ends of the single or multiple traction element end pieces passing through the strand several times can be linked to one another directly inside the pull rod, connected to the strand ( 89 ) or connected to another fixed longitudinal force transmission base (as also shown, for example, in FIGS. 24 to 28) his. Preferably this, the band lock on 89/90 purpose appropriate devices not shown. In the case of this strand construction, the pressure lamellae naturally require a construction which is open to the outside because of the "strand lock" projecting outwards, as can also be seen from FIGS. 21 and 22. In this case, the nose 92 of the pressure lamella base body 80 covers the edge of the tension cord 94 , which ensures (radial) guidance or locking between the pressure lamella and the tension cord.

The required for the function of a pusher belt, at least the desired internal pretension between the closed tension band system and the pressure element block is here preferably caused by the compulsory insertion of "filling pressure lamellae", as already described under previous other versions. Their main features are configurations such that they can be inserted under defined constraint at the end of assembly and secured against radial displacement. Devices that enable and maintain a pretension over the largely entire strand length are advantageous for building up a useful pretension between the tensile strand and the pressure lamella block. This is essentially achieved by one or more pressure lamellae axially fixed to the tensile cord at the end of the strand. Such specific exemplary embodiments show push link belt designs according to FIGS. 24 to 27.

Fig. 23 shows an alternative closure design to the split thrust link design described above.

Positions 100 , 101 and 102 in turn form a group of three pressure plates, the middle pressure plate 100 having a widened support base 103 for a flat composite element 104 that largely covers the neighboring pressure plates 101 , 102 . The band, which consists of one or more pieces, is wound through several times by rope-like tension elements, their ends being loop-like and always wrapping around the most distant of two bolts 106 and 107 arranged next to one another and resting against one another. In each case, the feed Zugele elements of a loop-like strand end 104 a are guided inside (in the illustration below) the bolt wrapped by the tension elements of the other strand end. Specifically in the present figure: the tensile elements 104 a of the band shown on the left pass underneath the bolts 106 wound by the tensile elements 104 b on the inside of the band when they are fed to the bolt 107 which they are wrapped around. An arrangement of the loop-like traction element ends on a sleeve 87 (according to FIG. 21) as well as a lateral arrangement of disks 108 , which alleviate side crushing and frictional loads of the traction element side edges, appear advantageous, but not shown. Bolts and intermediate sleeve profiles in rectangular shapes with slightly rounded sides, the edges of which are again very rounded, appear to be advantageous for this "string lock design". Because of the sliding behavior of the push link belt, the relative longitudinal displacement of the belt relative to the pressure plate block, the same pressure plate design requirement, an outwardly open construction (as shown and described in relation to FIGS . 20 to 22). The above and the above considerations and design information for the construction and maintenance of an internal pretension in the preassembled, open thrust link belt are also relevant.

Fig. 24 to 28 contain a further embodiment of an open pre-assembled, during installation verschließfähiges push belt, comprising a tensile cord of rope-like, preferably individually guided traction elements.

Uniformly arranged, aligned lamellae 120 in turn have an outwardly open, symmetrical recess for the seat of the pull cord 121 . As a Zugstrangauflage and -guide serve below arranged cross tunnels 122 , the elements 121 for them to support and guide the rope-shaped Zugele have adapted grooves. Their width (in the longitudinal direction of the strand) is coordinated such that they always rest at least on one pressure lamella, preferably as shown - but on two, if they are assigned (in the longitudinal direction of the strand) to the pressure lamellae 120 . The support bases 122 a directed towards the outside, inner transverse studs 122 are arched with a curvature radius that corresponds at most to the smallest (essentially non-polygonal) wrap radius in the friction disc wedge of the transmission. The edge sides 122 b of the inner transverse studs 122 protrude into an undercut 120 b of the pressure lamellae 120 , thereby ensuring that the tension cord is secured on the outside. This prevents the affected pressure slats from being pushed in or out. This is particularly relevant when leaving the belt from the disk wedge, where self-locking conditions can exist between the belt and the friction disks in the radial direction of movement, so that pressure lamellae can be exposed to considerable radial forces at the disk outlet. The outer seated cleat 123, however, ends in length in front of the nose 120 c of the pressure lamella 120 and is firmly connected to the lower cleat 122 . This can advantageously be achieved with a laser welding 124 , for which purpose a recess 123 b is made in the upper gallery for better accessibility in this part. The tension elements 121 are preferably arranged several times in two lateral groups, their ends being wound around an outer (rounded) stud 125 specially designed for this purpose. Above this is a further cover gallery 126 , which is in turn preferably connected by laser welding 127 , wherein it is under a pre-tension exerted on the ends of the tension member, so that the ends of the tension element are connected in this way. Tension element end connections are also possible by mutually screwing these studs.

An alternative tension element guide consists in that, as can be seen from Fig. 26 and particularly 27, the laterally grouped tension elements consist of only one tension element piece passing through the strand several times, the ends of which are wound in the manner described above around specially designed outer studs 125 which is firmly connected to a further cover lug 126 and the traction element end is also locked to the lug assembly. Of course, this tension element guide assumes that the upper cross studs 125 and 126 are attached when installing the push link belt. For storage, transport and assembly itself, an auxiliary fixing device is required to hold the pressure slats together to form a strand-like composite, which, for. B. could consist of an applied on the inside, removable after assembly tape assembly.

Laser welded connections advantageously appear to be suitable for strand end connections. Because this way of connection is concentrated and good because of the relatively easy handling directable energy beams economically and easily realizable, especially since they can be closed again after a destructive disconnection - which is a state of wear or other damage anyway The reason is - is not relevant.

It appears to be advantageous to build up the at least sensible internal pre-tension (prestressed system of adjacent pressure lamellae) required in the pre-assembled, open thrust link belt over the largest possible proportion of length. For this purpose, 121 c further outer studs 128 are arranged in front of the traction elements, which are wrapped by the traction elements and are provided and connected with cover studs 129 which lock the traction elements in a jamming manner. Between these "Endarretierungen" 122/128/129 is a increased preload is built up in the pre-assembly of the push belt for achieving a vorbe voted elongation of the incorporated pulling string. By loosening the connecting device of the band end studs 120 / 128/129 after installing the band, the previously prevailing internal pretension is then distributed evenly over the entire strand with a slight weakening.

Fig. 29 to 33 illustrate various Arretierungsausführungen for fixing the pressure segment to the tension member, in particular with tension cords of flat-belt-like or rope-like tension elements.

FIG. 29 shows a group of three of pressure plates 130 , 131 , 132 in a sectional illustration, of which the middle pressure plate has a widened support base 133 for the strand 134 . FIGS. 30 and 31 are associated with cross-sections of the push belt. The base body of the middle pressure lamella 130 has an outwardly open recess 36 b, c, in the base of which there is an inserted widened tension cord support base 133 with the rope-like tension element 134 lying thereon, or alternatively (not shown) a flat belt-like tension cord lying thereon. Furthermore, it has groove-like recesses 135 on both sides, into which a web 136 , which covers the tensile cord 134 , protrudes and ensures that this pressure plate 130 is fixed radially to the tensile cord 134 . The radial fixation of the adjacent pressure plates 131 and 132 is effected by appropriately profiled pins 137 a, b protruding from the middle pressure plate 130 on both sides, which are firmly seated in bores 138 and protrude into bores 139 a, b of the neighboring pressure plates 131 , 132 . The web 136 is advantageously largely rectangular to achieve specific loads on the train elements, preferably with curved surfaces and with rounded edges and made of spring steel and designed so elastic that it can be inserted from the outside by arcuate deformation when pushing belt assembly with already fitted neighboring pressure lamellae.

As an alternative to item 130, FIG. 32 shows a pressure lamella 140 with a tension cord support base 141 , which are covered by a welded-in web 143 . Because of the relatively low thermal edge load and the favorable handling options during assembly, this welding is again carried out by means of a laser. The radial locking of the adjacent pressure lamellae 131 , 132 to them can, as described above, again by means of pins 137 , 145 .

Fig. 33 shows a further alternative embodiment of a radially fixedly positioned on a tension cord pressure plate 150. In this case, the base body of the pressure lamb 150 basically has a dovetail-shaped undercut 151 on its sides, in the base of which it has an outward recess, into which an adapted, conical edge portion 153 of a web-like tension element support base 152 projects. This has grooves for supporting and guiding the rope-shaped tension elements 154 and is covered by a cross stud 155 , which is firmly connected to this support base 152 by means of laser welding 156 . The radial locking of the neighboring pressure lamellae can take place as described above by means of a mutually effective pin lock. Also, for example, all pressure lamellae of the pusher belt can be individually fixed to its tension cord in this way (according to FIG. 33).

By slidably forming the inner support bases on the tension cable support and guide piece 152 and their support base on the pressure lamella 150 , the tension elements 154 and the transverse cleats 152 and 154 form a tension band system which is "wanderable" with respect to the pressure lamella block. Wear and material fatigue loads due to "creeping movements" are eliminated.

FIGS. 34 and 35 illustrate a (e) bundling system and apparatus for packetizing of compressed lamellae semi-finished products for the purpose of (s) efficient, painstaking and careful storage and transport, as well as supply for the rational loading of machining centers for Drucklamellenferti.

According to Fig. 34 finished pressure lamella profiles 160 - even with completed hardening treatment - in multiple lengths of the individual pressure lamella lengths in a full circle formation around a "lost core" z. B. summarized in the form of a tube 161 . This core 161 is intended to ensure a (geometrically correct) coaxial arrangement and secure radial clamping (acting as an inner abutment) in addition to the mutual wedging by the abutting inner conical pressure lamella parts. A curved design of the outer pressure lamella end faces is advantageous for this tensioning process. The lamella profiles 160 are advantageously embraced or clamped directly after their production site and remain in storage, transport and largely also in further processing operations.

Fig. 35 shows for a rotationally symmetrical tensioning device in section. It consists essentially of a brief break in a full circle segment formed by way of clamping shoes 162 with inner and outer coaxial circular contour which are arranged lying around a ring body 169/172. This ring body 169 is slightly larger in its inner diameter 177 than the outer diameter of the pressure lamella semifinished product formation 160 , has a larger rounded bead 169 and a smaller rounded bead 172 . The clamping claw 162 has its inner arrangement a stepped groove 168/171. Furthermore, on the inside it has a round seat on one side up to the end of the clamping claw, the diameter of which corresponds to the outer diameter of the semi-finished product plate formation, and on the other side of the annular groove there is a free rotation 163 substantially above the outer diameter of the semi-finished product formation 160 . Outside, the clamping claw 162 outside, the clamping claw as seats for spring washers 165/175 or groups at their end regions punctures 164/174. Between them out adjacent to the center circular seats 166/173 is a recess on the 167th The bases 169 and 179 which support the clamping claws 162 on the inside, the round seat 176 comprising the pressure lamella semi-finished product formation 160 , the design and arrangement of the clamping claws in their ring formation and the clamping forces of the spring washers taking into account their geometrical assignment to the supports and pivot points of the clamping claws are coordinated and executed that:

• - The clamping force of the spring washers 175 via the seat 176 ensures that the annular pressure lamella profile formation 160 is held together for all situations (storage, transport, loading of machining centers);
• - In the unfilled state, the tensioning device is retained as a whole unit (does not disintegrate);
• - By applying radial force to the slightly spherical outer base 166 above the inner free rotation 163, the clamping claw can be lifted in the area of the inner seat 176 , even under rotating operating conditions;
• - The outer base 173 is formed over the inner seat 176 such that in a processing terminal as a tread, or as a centering or guide base - one or more attached to the rod-shaped pressure lamella composite - can be used and, or or directly as a collet acts in the headstock of a machining center.

Fig. 36 to 40 illustrate various Fertigungsopperationen for pressure segment of thrust belts, preferably with an outwardly open housing, with simultaneous processing of many, summarized to a circular ring formation (of FIG. 34 and 35) chevron shapes.

For this purpose, they are clamped in a workpiece-receiving spindle of a machining center in the form of the collet 180 shown in a stylized manner. The clamping element acting directly on the workpiece formation can consist of a clamping device according to FIGS . 34 and 35. Even if the processing terminal has its own clamping devices, it is advantageous for the loading process to feed the workpieces in the bundled form by means of the clamping device described above. Advantageously and additionally, the processing machine then has devices for releasing, retracting and removing the collets that are no longer required.

The semi-finished pressure lamellas to be processed are finished in the cross-sectional profile, is also preferred their hardness treatment completed, for which purpose such processing conditions according to the  Tool development the requirements exist. The shaping abrasive tools are even rotating tools around their axes with high cutting speed, so that the work piece rotation can run at low speed, which means that the guidance of long workpiece bars is untested is lematic.

In Fig. 36, the workpiece 181a is on standby for the processing of an end Drucklamel lenreibfläche according to the dotted curve contours 184th The edge end 185 shown can be a raw end contour of a newly introduced material strip or it can also have resulted from the parting off process according to FIG. 39.

Position 183 is a rotating, abrasive tool which is used for the (longitudinal) shaping of the one pressure lamella contour 186 .

After this operation, a synchronously rotating clamping device 180 c moves over the (composite) workpiece 180 b, encloses and grips it and pulls it out with a predetermined degree for further processing when the left-hand collet 180 b is released. With closed, rotating two collets 180 b and 180 c, the dotted contours 193 and 194 , for example a tension cord seat base on the pressure lamellae, are worked out by means of the rotating tools 191 and 192 .

FIG. 38 shows the attachment of an undercut 195 to the pressure lamella (according to position 150 FIG. 33), which is worked out using an angular rotary tool 196 (as part of the clamping according to FIG. 37). Tool and type of this undercut was already carefully chosen and coordinated with the pressure lamella design according to FIG. 33 in order to do justice to the spherically problematic method of removal in this removal procedure. For this purpose, it is necessary to keep the rotary tool 196 as small as possible in diameter.

After repositioning the collet 180 e according to FIG. 39, the pressure lamella assembly worked up to that point is cut off or cut off by tool 201 .

FIG Subsequently, according to. The second side 205 of the pressure plate Reibpartie processed by a rotating tool 206 40th

A subsequent tumbling of the cut-to-length pressure lamellas defuses or breaks their edges.

Fig. 41 illustrates an abrasive inlet stand for push link belts. This is to optimally ensure the friction surfaces of the link belt in order to ensure a uniform frictional contact load in the friction disc wedge of the friction gear and thus also a uniform, efficient frictional engagement under practical operating conditions. Under Fig. 19, the kinematic problems that may result from the overlapping of several pressure segment by a widened strip support are discussed and described compensating countermeasures. To such adverse effects, which may nevertheless occur due to manufacturing-related deviations - the u. U. also consciously accepted in favor of manufacturing costs-advantageous advantages - or as a result of incalculable practical elasticity behavior of the elements involved, the following end procedure to be included in the band production is proposed and claimed in order to adapt the friction part of the sliding link band to the true kinematic conditions. It can also be used to prevent (at least slightly) harmful increased edge loads on the friction surfaces of the pressure plates.

This run-in stand 200 has pairs of friction disks 210 a, b and 211 a, b adapted to the original conditions of use, which have an abrasive coating 212 , for. B. wear in the form of a diamond splinter or corundum coating, in which the thrust link belt 205 runs wedged. In this abrasive "running-in process", the sets of friction discs are continuously adjusted so that the belt is exposed to all occurring stages of curvature. It is efficient for the desired process to let this belt drive run with a predetermined slip which is metered in a predetermined manner by a control and regulating device of the machine. It seems advisable to start with a lower contact pressure, so that not all of the pressure plates are ablated as a result of the coarse contact of the friction surfaces, but rather the pressure plate sections that are dominant due to "unclean" joint kinematics conditions or are affected by production-related plate width inaccuracies. With increasing contact pressure up to normal, normal operating conditions, under which the final joint kinematics are only properly established, the desired uniform contact pattern is then created on the friction parts of the pressure plate block. The associated mutually optimizing influence of the kinematics process and the friction surface optimization specifies this process.

For cooling during the removal process, the inlet stand has an appropriate device 214 . As an alternative or in addition to abrasion by means of abrasive disc coverings, appropriately effective liquids with an abrasive effect or or and also final cleaning and rinsing liquids can also be supplied.

bibliography

• 1. Dr.-Ing. O. Dittrich "The continuously variable chain transmission as the main drive in a motor vehicle" VDI reports 803
• 2. Prof. Dr.-Ing. R. Höhn: "Why stepless transmissions in vehicles" VDI reports 803
• 3. Dr.-Ing. H. Ötting; Dipl.-Ing. P. Heidemeyer; Dipl.-Ing. R. Scholz; Dipl.-Ing F. Zimmermann: "Continuously variable transmissions for passenger cars" VDI reports 579
• 4. Dipl.-Ing. P. Heidemayer: "Why continuously variable transmissions in cars?" Sem.No. 811120021 Technical Academy Wuppertal
• 5. Dr.-Ing. H. Röper: "Status of CVT development - advantages and limits of the system" 2nd Aachen Colloquium: Vehicle and Engine Technology 89
• 6. Martin H. Cuypers, Jan M. Seroo: Torques that can be transmitted by metal V-belts and chains in stepless motor vehicle transmissions. Drive technology 29 ( 1990 ) No. 5
• 7. HJ Becker: Mechanics of the Van Doorne push link belt antriebstechnik 26 ( 1987 ) No. 8
• 8. Dr. H. Quante: New materials in the development of V-ribbed belts VDI report no .: 1467 1999
• 9. Dipl.-Ing. M. Birmelin: In the field of tension to unity KEM (Construction-Electronics-Mechanical Engineering) August 1997

Patent (application) documents

• 1. Europe patent 0 135 710
• 2. DE 28 21 698
• 3. FR 1.066.329
• 4. US 4,338,081
• 5. DE 31 45 470
• 6. CH 256918
• 7. DE 195 14 398
• 8. DE 21 16 930
• 9. DE 323 43 454
• 10. US 4,303,403
• 11. EuroPa 0135237

Claims (20)

1. thrust link belt for CVTs,
consisting essentially of one or more arranged, conventional prestressing tensile cord, presumably practically made up of several layered steel strips, or of known flat belt-like tensile elements (from the technical or patent literature), embedded in a flexible material,
with metallic pressure lamellae loosely arranged on it in the longitudinal direction of the strand, lying against one another and tapering on the inside of the thrust link belt, with a height-strength ratio of more than 3: 1, which are in frictional contact with the conical friction disks in the wrapping area via their end-face frictional contact surfaces,
with at least one of the following design features, characterized in that:

• - The support bases for the band ( 7 ; 16 ; 26 ; 44 ; 84 ; 94 ) or rope-like tension elements ( 64 ; 104 ; 121 ; 122 ; 134 ; 141 ; 154 ) on the pressure lamellae are designed to be enlarged so that they exceed at least one lamella thickness they each cover at least one, preferably two adjacent pressure plates ( 2 ; 3 ; 12 ; 13 ; 22 ; 32 ; 33 ; 41 ; 41 ; 68 b; 68 c; 81 ; 82 ; 101 ; 102 ; 131 ; 132 ), or rest on and support them;
• - In a recurring sequence of pressure lamellae ( 22 , 23 ; 32 , 33 ) on their sides of the belt seat elongated belt contact bases ( 27 ; 34 ; 35 ; 46 ; 47 ) are arranged, which are at least one adjacent pressure lamella ( 2 ; 3 ; 22 ; 23 ; 30 ; 41 ; 42 ;) and are such that they take over the lateral contact of the band ( 26 ; 44 ),
• - The tape support base ( 53 ; 63 ; 103 ; 122 ; 133 ; 134 , 142 ; 152 ) for receiving and guiding rope-shaped tension elements ( 64 ; 104 ; 121 ; 134 ; 141 ; 154 ) has rounded grooves adapted to the tension elements;
• - The pre-tensioning pull cord consists of individually guided longitudinally extending rope-shaped tension elements ( 121 ) from a lower on the pressure plates ( 120 ) lying and slidably designed studs ( 122 ) and an upper stud ( 123 ) with the lower is firmly connected is included;
• - the bias voltage causing tension cord (26; 84/85; 44) of rope-like tension members (94; 95; 104), which are combined as a mesh, knitted fabric or by means of a bendable embedding to a flat-belt-like strip shape, is;
• - a largely existing in rope-like tension members, the bias voltage causing Direction tensile member is made not (as conventionally) endlessly, but is open and directions at its belt ends A (86/87/88/89; 105/106/107/108; 125/126 / 127 ) for sealing into an endless band;
• - The associated from a tensile strand consisting of steel strips pressure lamella ( 22 , 30 , 40 , 41 , 42 ) for their seat has a centrally arranged, outwardly open recess which extends inwardly so far that the steel strip largely in the area of Lamella pivot point is positioned radially when curving the strand;
• - The pressure lamella ( 22 ; 30 ; 40 ; 41 ; 42 ; 61 ; 80 ; 120 ; 130 ) as the seat of the tension cord causing the pretension has a centrally arranged, outwardly open recess in the base of which the widened belt support bases are formed or arranged, as well as various devices for fixing the tape to the pressure lamella block, and devices for mutually radially fixing the pressure lamellae to one another, are attached to it, or it is designed in this way;

2. thrust link belt for CVT's according to claim 1, characterized in that the widened belt support base ( 5 ; 14 ; 24 ) and the lateral belt support base ( 27 ; 34 , 35 ) from a material portion of a pressure plate ( 1 ; 22 ; 23 ; 32 ; 33 ). 3. thrust link belt for CVT's, according to claim 1, characterized in that the preferably widened on both sides, over the almost entire width of one or more adjacent pressure plates ( 12 ; 13 ; 32 ; 33 ) extending support base ( 14 ; 224 , 31 ) for the belt ( 16 ; 26 ; 44 ) consists of a compressed material section of a pressure lamella ( 11 ; 30 ). 4. thrust link belt for CVT's, according to claim 1, characterized in that the widened, extending over almost the entire width of one or more neighboring pressure plates support bases ( 43 ; 63 ; 83 ; 103 ; 122 ; 133 ; 142 ; 152 ) and the lateral contact bases ( 47 ) for the band ( 44 ) consists of a support and guide piece ( 43 ; 53 ; 63 ) placed on a pressure plate ( 22 ), which is preferably attached to a pressure plate by means of laser welding, or by means of a groove ( 54 ) on a pressure plate ( 130 ) is locked. 5. thrust link belt for CVT's, according to claim 1 to 4, characterized in that the widened, almost over the entire width of one or more neighboring pressure lamellas extending tape support bases have a curved contour, preferably in a radius shape of approximately corresponds to the ideal belt radius with the smallest running radius in the friction disc wedge, with the edges (related in the longitudinal direction of the belt) are rounded. 6. thrust link belt for CVT's, according to claim 1 to 5, characterized in that the widened belt support bases ( 53 ; 63 ; 83 ; 103 ; 133 ; 142 ; 152 ) rope-shaped tension elements (( 64 ; 94 ; 104 ) adapted (concentrically to the running radius in Wrap bow) have curved grooves ( 56 ). 7. thrust link belt for CVTs according to claim 1 to 6, characterized in that the pressure plates ( 1 ; 22 ; 30 ; 40 ; 41 ; 42 ; 61 ; 80 ; 120 ; 130 ; 140 ; 150 ) for fixing them to the tension cord causing the pretension have at least one of the following features:

• a) the conventionally side seat of the pull cords, e.g. B. in the form of known layered steel strips ( 7 ) is covered by a, preferably by means of laser welding ( 9 ) on the pressure lamella base body ( 1 ) fixed web ( 8 );
• b) the devices for fixing the pressure lamellae to the tension cord which causes the pretensioning and is arranged one or more times in the largely centrally and outwardly open recess ( 36 ), consists of at least one of the following design features:

• - A continuous web ( 50 ; 65 ; 143 ) is preferably welded by means of laser welding ( 48 ; 66 ; 67 ; 144 ) over the tensile cord ( 44 ; 64 ; 141 );
• - The recess on the pressure lamellar base body ( 22 , 30 ; 41 ; 42 ; 80 ; 120 ; 130 ; 150 ) has an undercut ( 28 ; 151 ) in such a way that a portion of the tension cable ( 26 ; 94 ) protruding into it or one on the tension cable (121) fixed stud system (122/123/125; 122/125/126) is radially fixed;
• - The recess on the base of the pressure lamella ( 130 ) has a groove-like undercut ( 135 ) into which a retaining bracket ( 136 ) projects, which covers the tensile cord ( 134 ), which preferably consists of spring steel with a square profile with rounded corners and has sufficient bending elasticity to be "inserted" in the arched state.

8. thrust link belt for CVT's, according to claim 1 to 7, characterized in that to the radially fixed to the tension cord pressure plates ( 22 ; 61 ; 130 ) those without a direct tension cord fixation are assigned adjacent, the directly attached to the tension cord and the neighboring ones the tensile member is not directly fixed pressure segment comprise means for radial fixing of these adjacent pressure segment (21/22/23; 30/31/32; 130/131/132) unterein other, and this mutual fixation preferably consists in that - A pressure plate ( 130 ) has one or more projecting on one or both sides, spherically formed bolts ( 137 ), each in a bore ( 139 ) of the adjacent plates ( 131 ; 132 ) pivotably protrude, or

• - The enlarged base or system bases ( 24 ; 27 ; 31 ; 43 ) (for the tension cord) protrude into the clearances ( 28 ) of the neighboring pressure lamella that are coordinated with them.

9. thrust link belt for CVT's, according to claim 1 to 5, characterized in that 2 for generating a preload in a closed, endless thrust link belt, pressure lamellas are designed and arranged so that they can be "repackaged" into the strand, whereby for example, these are forcibly inserted into the strand and then, preferably by means of a laser weld, be connected. 10. thrust link belt for CVT's, according to claim 1, characterized in that one of several individually guided or combined into a composite rope-like Zugele elements made of synthetic fibers or metal strands ( 85 ; 129 ) existing, the biasing effect, open and lockable tension cord of a subsequent lock system having:

• - Consisting of a bolt ( 86 ) which is wrapped by the ends of the traction elements, the supply of all traction elements to this locking bolt ( 86 ) being largely tangential on the inside, in which a frame-like strand lock ( 89 ) with seats for receiving this bolt ( 86 ) and is equipped with hold-down devices ( 90 ) for tangential feeding of the tension elements to the bolts,
• - Consisting of two bolts ( 106 ; 107 ), with each of the traction element ends ( 104 a) leading to the bolt ( 108 ) wrapped by them underneath the bolts ( 106 ) which are guided around the other end of the traction element ( 104 b);
• - consisting of pairs of studs (122/125/126) arranged one above the other and connected to one another, between which the traction element ends ( 121 ), of which at least one stud ( 125 ) is wound at least one and a half times, are clamped, the stud connections being made of (preferably laser) There are welds or screw connections.

11. thrust link belt for CVTs, according to claim 1, 10 and any other preceding claims, characterized in that the tension element guide and the locking device has at least one of the following design features on the openly manufactured tension cable causing the prestressing:

• - The tension elements on the strand end are looped around a sleeve ( 87 );
• - The tension elements ( 95 ) in the strand end area of the band are combined into groups (95a-95f; 95g-95s; 95t-95y);
• - Sheathed tensile elements combined into a flat belt-like tensile cord are guided in the end area bare without sheathing;
• - In the end regions of the band with rope-like tension elements ( 95 ), where they deviate relatively strongly from the parallel arrangement, metallic reinforcements ( 96 ; 97 ; 98 ) are preferably arranged in the strand composite such that they:
• - increase the transverse rigidity in the area of the tensile elements combined into groups (elements 99 ),
• - depending on the direction of action of the side force components resulting from the tensile element loads, counteract them (e.g. by means of element 96 ) or hold them together (e.g. by means of element 97 ),
• - cause dimensional stability in the longitudinal direction of the strand (e.g. by means of elements 98 ),

these reinforcements preferably consist of spring steel and are intertwined. 12. thrust link belt for CVT's, according to claim 1, 11 and any further preceding claims, characterized in that the tensioning cable causing the tension or a cable group consists of a rope-shaped tension element which

• - several times in several pieces ( 129 ) in parallel or
• - as a piece ( 121 ) passes through the strand several times, or a strand piece, or
• - is arranged in a mixed manner.

13. thrust link belt for CVT's according to claim 1 and 12, characterized in that the lowermost cleat ( 122 ) on its inside and its support portion on the pressure lamella have slidable structures and the cleat-tension element connection is designed such that cleats and tension elements form a tension band system. 14. thrust link belt for CVT's according to claim 1 and any other above claims, characterized in that the lower support section ( 72 ) of a widened tension element support ( 63 ) and the supporting support section ( 73 ) of the pressure plate ( 63 ) covered by it contours ( 71 ; 72 ) in such a way that when swiveling adjacent pressure plates ( 65 ; 68 ) in the friction disc wedge of the friction gear with largely uniform wedging of the friction parts ( 4 ; 62 ) of the pressure plates ( 1 ; 61 ) a largely uniformly distributed wearing of the widened tension element support bases, and thus also a uniform support of the radial forces caused by the tensioning tension train ensures, for which a basic embodiment is that these contact and rolling parts have shapes such that the gaping effects that occur when swiveling between the two contact bases due to the result of the under the movement of the adjacent pressure lamellae ( 65 ; 68 ), is compensated. 15. push belt for CVT's, according to claim 1 and any above mentioned claims, characterized in that open prefabricated thrust belts on, or close to its (open) ends in the longitudinal direction acting fixed connections (126 b / 128/122 x) between the bias effecting tensile cord ( 120 c) and the adjoining pressure lamellae have and the pressure lamellae ( 120 ) are packaged in the intermediate strand piece under a predetermined bias, this stud-tension cord connection is created so that it is installed after installation of the thrust link belt the CVT is detachable, for example in the form of a screwable stud group. 16. Bundling system and device for pressure lamella semi-finished products for the production of pressure lamellas for CVT's, in particular for pressure lamella designs according to claim 1 and any other preceding claims, for economical and rational storage, transport and loading of machining centers, their construction and function, characterized in that a lost core (161) are arranged in a circular ring shape in the cross-sectional profile and hardening treatment finished printing lamellar semi-finished products (160), a clamping device are held together in a circular ring shape arranged clamps (162), said clamping jaws slightly to an inner largely centrally arranged ring (169/170) by means of segmental lie swiveling, on one side inside a clamping seat ( 176 ) for the formation of pressure lamella semi-finished products and on the outside a clamping force action base ( 173 ) and an annular groove ( 174 ) with spring washers ( 175 ) for automatic assembly the pressure lamella semi-finished and clamping claw formation is arranged, furthermore the other outside has a ventilation base ( 166 ) with a spring ring ( 165 ) for holding the clamping claws ( 162 ) together when the device is empty. 17. Manufacturing process for pressure lamellas of thrust link belts for CVT's, in particular with Features according to claim 1, 16 and any other above claims, characterized in that the machining center intended for this   has at least one rotatable workpiece clamping device for receiving the rod-shaped pressure lamella semi-finished products ( 160 ) provided in a circular ring formation and finished in profile, or also clamping devices for clamping and handling the filled clamping device according to claim 16,

• - rotating abrasive tools for at least one of the following machining operations:
  Profiling the one friction surface contour ( 134 ) by means of a tool ( 136 ),
  double-sided tensioning and recessing of the tension cable seat ( 140 ) using a tool ( 138 )
  if necessary, working out a rope-like tension cord seat ( 141 ) using a tool ( 139 )
  if necessary, undercut ( 192 ) using a tool ( 193 )
  Repositioning the rear collet ( 180 a), parting off with a tool ( 194 )
  Profiling the other friction surface contour ( 195 ) using a tool ( 196 ).

18. End manufacturing and running-in method for push link belts for CVT's, in particular with design features according to claim 1 and any other preceding claims, characterized in that
endless or openly produced and pre-assembled into an endless composite thrust link belts are subjected to an abrasive running-in process in an apparatus which essentially has the following design and functional features:

• - Two geometrically the same gear, rotatable friction surface carrier ( 210 a; 201 b; 211 a; 202 b), of which at least one pair of discs can be opened, which with a removable coating ( 212 a, b, c, d) z. B. are provided with a corundum or diamond splinter coating;
• - The pairs of friction disks ( 210 , 211 ) are adjustable to the extent of the intended transmission range;
• - A drive and control device which has a predeterminable manner controls a slip which can be metered, has an automatically running control strategy such that initially the abrasive running-in process begins with low friction disc pressure with large slip and thus with intensive removal, then the slip progressively decreases, and the pressure increases.
• - A liquid supply device ( 205 ) for coolant or also and and for abrasive liquid media (emery substances) for an additional or main abrasive process, and detergent for a final cleaning process.