EP0873481A1 - Belt for a transmission as well as transmission with belt - Google Patents
Belt for a transmission as well as transmission with beltInfo
- Publication number
- EP0873481A1 EP0873481A1 EP97901540A EP97901540A EP0873481A1 EP 0873481 A1 EP0873481 A1 EP 0873481A1 EP 97901540 A EP97901540 A EP 97901540A EP 97901540 A EP97901540 A EP 97901540A EP 0873481 A1 EP0873481 A1 EP 0873481A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- belt
- cage
- tension
- push
- belt according
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16G—BELTS, CABLES, OR ROPES, PREDOMINANTLY USED FOR DRIVING PURPOSES; CHAINS; FITTINGS PREDOMINANTLY USED THEREFOR
- F16G5/00—V-belts, i.e. belts of tapered cross-section
- F16G5/16—V-belts, i.e. belts of tapered cross-section consisting of several parts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/02—Parts of sliding-contact bearings
- F16C33/04—Brasses; Bushes; Linings
- F16C33/06—Sliding surface mainly made of metal
- F16C33/10—Construction relative to lubrication
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/46—Cages for rollers or needles
- F16C33/50—Cages for rollers or needles formed of interconnected members, e.g. chains
Definitions
- the invention relates to a belt for transmitting a torque between two or more rotatable rotary bodies, consisting of a tension belt that can be subjected to tensile stress, and a thrust belt that works with the tension band and can be moved in its longitudinal direction and engages in the longitudinal direction, which acts on the rotational bodies for the transmission of with the Torque related forces.
- a similar strap is known. It is used, for example, in continuously variable transmissions, where the rotating bodies are designed as disks with a variable gap width.
- the running radius of the belt can be varied depending on the gap width of the pulleys, which enables a variable ratio.
- the power transmission between belt and pulley can be based on friction or on the engagement of uniformly shaped, interlocking surfaces.
- the belt of the invention is not only suitable for such a variable transmission, but can also be applied to other rotatable rotating bodies.
- the known belt usually has a tension belt which is constructed from a layer package, while the push belt has a large number of thrust plates which are received transversely from the layer package and support one another. The layers and the thrust plates can slide over each other to give the belt so much flexibility that it can be easily passed around the pulleys.
- the layers are exposed to high levels of fatigue.
- the running layers are bent and stretched, and under high load.
- high demands have to be placed on the material of the layers as well as on the shape and dimensional accuracy.
- the object of the invention is to design the belt so that extreme loads are avoided.
- the goal is achieved by pulling straps and
- Timing belts work together using a bearing system, and that
- Access belts are provided.
- the tension belt according to the invention does not turn, it is only loaded by a constant tensile load and not by a constantly changing cyclical bending load. There are hardly any significant movements between the layers of the package, which means that the frictional loads are minimal. Furthermore, the manufacture of such a strap is less critical.
- the bearing system provides very low friction between the tension belt and the push belt, which is in any case significantly less than with a normal belt with a rotating tension belt.
- the storage system can be implemented in many different ways.
- the first option is to have a pump for supplying lubricant between the tension belt and the push belt.
- the pump for supplying the lubricating oil must start to work before high loads occur in the belt.
- This type of storage works well with a relatively wide belt. That is why this version is suitable for the transmission of large outputs, such as those that occur on trains and ships.
- the tension belt or push belt can have a bearing surface with a surface structure, so that constrictions occur on the bearing surfaces mentioned to build up a pressure in the lubricant to produce a hydrodynamic bearing.
- Push belts can have grooves, e.g. B. in arrow form. With such a shape Oil or grease is stowed on the bearing surface towards the center of the bearing surfaces, which creates a hydrodynamic pressure which is sufficient to separate pulling belts and pushing belts and to bear them against each other with very low friction.
- Oil pump needed This may be less desirable for applications in the automotive industry. In such cases, the storage system after the second
- roller bearings Possibility to include rolling bearings.
- various roller bearings can be considered, such as
- Ball bearings needle bearings, roller bearings or the like.
- Push belt is then each push plate stably supported by several rolling elements.
- the storage system can comprise roller bearings, the rollers being separated from one another by a flexible cage which extends between the push belt and the tension belt.
- the purpose of the cage is also to avoid skewing the rollers.
- the cage can be held in its longitudinal direction under pressure.
- the cage can be composed of separate cage elements which are supported against one another under compressive prestress.
- the risk of skewing is related to an incomplete filling of the belt, for example as caused by stretching the tension belt. This can create a margin between the cage elements. Such a margin does not arise if the longitudinal direction of the cage has at least one pair of flexible tongues on opposite sides and the adjacent ones Tongue of two adjacent cage elements are supported against each other.
- skewed movements can also occur in the cage elements themselves.
- the cage can have laterally protruding contact parts which can come into contact with the facing friction surfaces of the rotating bodies.
- the rotating bodies move twice as fast as the cage.
- Rotating bodies come to rest, they are carried away and accelerated in the direction of movement of the rotating bodies. As a result of this acceleration, the cage elements are pressed into the correct position again.
- the tension belt does not have to rotate with the push belt due to the invention.
- the bearing system ensures that only a small load is exerted on the tension belt. Nevertheless, it must be ensured that the tension belt remains stationary even with such low driving forces.
- the first possibility would be that part of the tension belt consists of a relatively rigid part that extends over one of the two straight sections of the belt. As soon as the rigid part of the tension belt has reached the curvature of the pulley, the movement of the tension belt stops and then stops.
- the tension belt can be layered, the tension belt layers being attached to one another in the relatively rigid section of the belt.
- the other, unattached parts of the tension belt layers can be impregnated with a lubricant.
- the drawstring carries fastening devices for fastening the belt to the housing or to a fixed part thereof.
- the invention relates both to a continuously variable transmission, consisting of the belt discussed above, and to at least two disks, each consisting of two in principle conical disks, one below the other have a variable spacing and " V-shaped groove in which the belt is received.
- the fastening devices of the tension belt can be fastened to the transmission housing or to a fixed part thereof.
- Figure 1 shows a translation with two pulleys and a belt according to the invention.
- Figure 2 shows a section through the belt according to II - II of Figure 1.
- Figure 3 shows the longitudinal section III - III corresponding to Figure 2.
- Figure 4a and b show groove shapes for an alternative storage.
- FIG. 5 shows cage elements with rollers.
- FIG. 6 shows a cross section through the belt with cage elements according to FIG. 5.
- FIG. 7 shows a side view of a cage element according to FIG. 8.
- FIG. 8 shows (partially) a plan view of a cage element from several
- the translation shown in Figure 1 consists of two discs 1 and 2, and a belt 3 which is guided in a wedge-shaped gap.
- Gap of the discs can be changed in the usual way, not shown, such that the running radii from the belt 3 to produce different
- the belt 3 comprises a tension belt 4 which is layered and consists of a number of tension belt layers 5.
- the push belt 6 consists of a large number of transverse elements or push plates 6 oriented transversely to the pull belt, which abut one another. These thrust plates work in the usual way with their wedge-shaped chamfered ends 7 with the wedge-shaped disks 1 and 2.
- a bearing system 8 is arranged between the tension belt 4 and the push belt 6, which in the embodiment of FIGS. 1 to 3 consists of a large number of rollers 9 which are separated by a flexible cage 10.
- a plurality of rollers 9 are attached side by side; FIG. 3 shows that these rollers are shifted from one another in the longitudinal direction by the belt 3.
- the thrust plates 7 of the thrust belt 6 can be supported on the surface 11 almost smoothly with respect to the tension belt 4 by means of rollers 9.
- the pulling belt is thereby prevented from rotating with the pushing belt 6 by stiffening one of the straight sections 16.
- the stiffening can be done by tacking the tie straps 5 of the section 16, e.g. B. by gluing, soldering or the like.
- the belt 3 is lubricated by the oil present in the transmission housing. which is thrown between the thrust plates by the centrifugal forces. secured (see arrow 13 in Figure 3). From there, the oil penetrates between the rollers and the tension belts. Such an oil flow is also useful for cooling the
- FIG. 4 The views of the bearing surfaces of the tension belt shown in FIG. 4 show V-shaped (Fig. 4a) and W-shaped (Fig. 4b) grooves 14 and 15.
- the push belt and the tension belt lie with their bearing surfaces facing one another on each other.
- the narrowing of the grooves accumulates the oil towards the center of the bearing surface during operation, which creates a hydrodynamic bearing.
- FIG. 5 shows a detail with two cage elements 20, together with rollers 9. These cage elements 20 are provided with elastic tongues 21 which are held against one another under compressive prestress. Thanks to this compressive pretension, the cage elements 20 are secured against skewing movements, even if there would be room to maneuver if the tension strap stretches under load.
- the underside of the cage elements (in FIG. 5) is slidably supported on the pull strap 4.
- FIGS 6-8 show a variant of the cage elements, consisting of several cage element parts 22. These parts are displaced relative to one another in the longitudinal direction of the belt in order to achieve a smooth running. As can be seen in these figures, each cage element part 22 is adjacent to two elastic tongues 21.
- protruding contact parts 23 are provided on both sides of the cage. With possible transverse or skewed movements of the These contact parts 23 come into contact with the cage against the adjacent friction surface of the rotary body 1, 2. These rotary bodies 1, 2 move twice as fast as the cage; this creates the contact parts a reset effect that leads to the inclination of a skew.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Details Of Gearings (AREA)
Abstract
Description
Claims
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE29600528U DE29600528U1 (en) | 1996-01-13 | 1996-01-13 | Link cage |
DE29600528U | 1996-01-13 | ||
NL1003354 | 1996-06-17 | ||
NL1003354A NL1003354C2 (en) | 1996-06-17 | 1996-06-17 | Belt for transmission of torque between two or more rotary bodies |
PCT/EP1997/000198 WO1997025552A1 (en) | 1996-01-13 | 1997-01-13 | Belt for a transmission as well as transmission with belt |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0873481A1 true EP0873481A1 (en) | 1998-10-28 |
Family
ID=26058544
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97901540A Withdrawn EP0873481A1 (en) | 1996-01-13 | 1997-01-13 | Belt for a transmission as well as transmission with belt |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0873481A1 (en) |
AU (1) | AU1541997A (en) |
WO (1) | WO1997025552A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ATE470808T1 (en) | 2000-12-28 | 2010-06-15 | Bosch Transmission Technology | METALLIC PRESSURE TAPE AND APPROPRIATE OIL SPECIFICATION |
DE10121633A1 (en) * | 2001-05-03 | 2002-11-07 | Zf Batavia Llc | Thrust link belt for automatic transmission has additional outer ring pack provided to absorb radial forces arising on thrust links and installed on outside around thrust link belt |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS596450A (en) * | 1982-06-29 | 1984-01-13 | Toyota Motor Corp | Belt block of drive belt for torque transmitting device |
JPS5937356A (en) * | 1982-08-27 | 1984-02-29 | Toyota Motor Corp | Endless belt for power transmission |
JPH0621635B2 (en) * | 1982-12-28 | 1994-03-23 | アイシン・エィ・ダブリュ株式会社 | V-belt type continuously variable transmission |
US4741727A (en) * | 1985-12-23 | 1988-05-03 | Honda Giken Kogyo Kabushiki Kaisha | Power transmission V belt |
CA2047048C (en) * | 1990-07-25 | 1996-07-30 | Takashi Masuda | High load force transmission belt |
DE29600528U1 (en) * | 1996-01-13 | 1996-03-07 | Skf Gmbh, 97421 Schweinfurt | Link cage |
-
1997
- 1997-01-13 AU AU15419/97A patent/AU1541997A/en not_active Abandoned
- 1997-01-13 EP EP97901540A patent/EP0873481A1/en not_active Withdrawn
- 1997-01-13 WO PCT/EP1997/000198 patent/WO1997025552A1/en not_active Application Discontinuation
Non-Patent Citations (1)
Title |
---|
See references of WO9725552A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO1997025552A1 (en) | 1997-07-17 |
AU1541997A (en) | 1997-08-01 |
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Legal Events
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
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Effective date: 19980713 |
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