US3667308A - V-belt - Google Patents

V-belt Download PDF

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Publication number
US3667308A
US3667308A US91984A US3667308DA US3667308A US 3667308 A US3667308 A US 3667308A US 91984 A US91984 A US 91984A US 3667308D A US3667308D A US 3667308DA US 3667308 A US3667308 A US 3667308A
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US
United States
Prior art keywords
belt
elastomer
edged
raw
core
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.)
Expired - Lifetime
Application number
US91984A
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English (en)
Inventor
Johann Schwab
Anna Magritsch
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Semperit AG Holding
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Semperit AG Holding
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Publication date
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Publication of US3667308A publication Critical patent/US3667308A/en
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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
    • F16G5/04—V-belts, i.e. belts of tapered cross-section made of rubber
    • F16G5/06—V-belts, i.e. belts of tapered cross-section made of rubber with reinforcement bonded by the rubber
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D29/00—Producing belts or bands
    • B29D29/10—Driving belts having wedge-shaped cross-section
    • 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
    • F16G5/166—V-belts, i.e. belts of tapered cross-section consisting of several parts with non-metallic rings

Definitions

  • the p cover [51] lnLCL 1 5 1 1 1 22 layer is formed of a fiber fleece or a wide-meshed fabric 58 Field ofSearch ..74 231 R237, 234, 233 completely impregnated with an elaswmaf- If desired, the raw-edged V-belt construction of the invention may further be [56] References Cied equipped with a bottom cover layer.
  • the invention further contemplates that one or both cover layers of the V-belt con- UNITED STATES PATENTS sist of an elastorner of low modulus of elasticity, but higher breaking elongation, than the elastorner of the core.
  • PATENTS sist of an elastorner of low modulus of elasticity but higher breaking elongation, than the elastorner of the core.
  • the present invention broadly relates to V-type belt constructions and, more specifically, deals with a new and improved construction of raw-edged V-belt which is of the type embodying a top cover layer, reinforcement insert means, a core and, if desired, a bottom cover layer.
  • prior art raw-edged V-belts generally consist of an impregnated fabric insert at the base of the V-belt possessing good adherence properties, a core formed of a rubber mixture of, for instance, 80 to 85 Shore, a reinforcement insert formed of polyester cord wound in the peripheral direction or with a slight inclination, and a cover layer formed of an impregnated fabric likewise possessing good adhering properties and composed of three to four fabric layers.
  • the fabric layers consist of cotton since the adherence problems can be most easily overcome because of the large number of individual fibers, in that, for instance, at the calender machine there can be frictionally applied to the cotton fabric the desired rubber mixture or composition.
  • the prior an raw-edged V-belts of this type generally possess two basic drawbacks.
  • the fabric material located at the base of the V-belt reduces the elasticity of the belt at that location. Should the fabric layer at the base of the V-belt become damaged even if such damage is slight because of the repeated bending and rolling movements of the belt which occur during continuous operation, then such damage can eventually lead to a tearing or rupture of the fabric inasmuch as from the moment of time where the base layer has become damaged a considerable portion of the deformation energy tends to concentrate at this location. Consequently, the tendency towards the formation of fissures or tears at the core of the V-belt can increase.
  • the raw-edged belt constructions of the prior art including those using rubberized fabric layers as the top and/or bottom layer, have not been able to successfully cope with the aforementioned difiiculties existant in such rawedged V-belts during use thereof.
  • a primary object of the present invention therefore, relates to an improved construction of raw-edged V-belts which effectively fulfills this need and overcomes or at least minimizes the difficulties associated with the prior art belt constructions of this type.
  • Still a further significant object of the present invention relates to an improved construction of raw-edged V-belt which is economical to manufacture, provides for increased durability and adherence of the various layers and components of the belt to one another during operation, therefore affording increased belt longevity, and generally, tends to provide a belt construction of the type mentioned which is superior to the prior art constructions.
  • the fiber fleece there can be used a non-woven fabric or web, the fibers of which are randomly oriented or, at best, only slightly oriented, and specifically preferably transversely with respect to the direction of travel of the belt. While a wide-meshed fabric can be employed in the practice of the invention, it is here mentioned that the use of a randomly oriented or only slightly oriented fiber fleece is most preferred, with random-orientation being considered the most desirable.
  • a fiber fleece or wide-meshed fabric formed most preferably of polyamide fibers, although other materials such as polyester fibers, steelwool, glass fibers, by way of example, may conceivably also be used in the practice of the invention.
  • a raw-edged V-belt embodying a top cover layer formed of a fiber fleece or a wide-meshed fabric completely imbued with an elastomer, reinforcement insert means, and a substantially trapezoidal-shaped core formed of elastomeric material. If desired, a further cover layer may be provided at the base of the V-belt which likewise contains or is imbued with an elastomer.
  • At least one of both cover layers consists of an elastomer of lower modulus of elasticity but higher breaking elongation than the elastomer of the core.
  • FIG. 1 is a schematic cross-sectional view of a first embodiment of inventive raw-edged V-belt designed according to the teachings of the present invention.
  • FIG. 2 is a similar cross-sectional view of a modified form of a raw-edged V-belt construction of the invention.
  • FIGS. 1 and 2 two exemplary embodiments of inventive raw-edged V-belt constructions. More specifically, in FIG. 1 there is shown in cross-sectional view a raw-edged V-belt possessing the top cover layer 1, reinforcement insert means 2 and a core 3, whereas the modified form of V-belt construction of FIG. 2 additionally possesses two adhering layers 4 as well as a bottom cover layer 5 provided at the base of the V-belt.
  • top cover layer a rubber impregnated randomly oriented fiber fleece and instead of the previously used prior art fiber layer at the base of the V-belt there is employed a rubber cover layer possessing a modulus of elasticity which is less than a third, preferably about one-sixth, of that of the core mixture.
  • the breaking elongation of the base mixture should be more than twice, preferably about four times, that of the core mixture.
  • Shore hardness is advantageously less by about to about 30, preferably about 20, than that of the core mixture. If desired, the same relationship noted above may be provided for the top cover layer and the core.
  • Pressing of a soft rubber layer onto the base of a V-belt equipped with an enclosure prior to vulcanization is known and in such instance functions as a dust protective device.
  • a rubber layer is inserted in the mold and thus must amount to at least one to 2 millimeters, and, on the other hand, does not prevent rupture of the enclosure, since during use such is loaded to the same extent as in the absence of the soft rubber layer.
  • the optionally employed softer rubber mixture used for the base of the V-belt simultaneously is used as the imbuing-or embedding mixture for the material of the top cover layer and/or as the adhering agent between the reinforcement inserts and-the cover layer and core respectively.
  • the optionally employed softer rubber mixture used for the base of the V-belt simultaneously is used as the imbuing-or embedding mixture for the material of the top cover layer and/or as the adhering agent between the reinforcement inserts and-the cover layer and core respectively.
  • an alternative imbuing mixture in which chloroprene and SBR (styrene butadiene rubber) are mixed with one another and compatible consistsof the following composition:
  • Chloroprene W-Type neoprene of Dupont
  • SBR 35 parts
  • SFR-gas black 5 parts
  • Zinc oxide 4 parts
  • Magnesium oxide 3 parts aromatic plasticizer 1 part N-Cyclohexyl-2-benzothiazolsulfenamide l part sulphur 0.5 parts Tetramethylthiuram monosulfide
  • the last-enumerated formulation for the imbuing mixture should not be used for the core since it possesses insufficient oil resistance.
  • top cover layer there can be employed a non-compacted polyamide randomly-oriented fiber fleece of a thickness 1.5 to 2 mm with a surface weight of 200 g/m, which preferably is prepared with a resorcinol fonnaldehyde resin-vinylpyridine latex-mixture.
  • the fleece is then imbued with a 25 percent solution or dispersion of the imbuing mixture in toluol, squeezed between two rolls and dried in a hot air channel at 70 C. to C.
  • 400 g/m rubber whereby the fleece already compacted to a thickness of one millimeter possesses a surface weight of 600 g/rn.
  • the pre-preparation solution is prepared as follows: A solution of 3 parts of a 37 percent formaldehyde solution, 5.5 parts resorcin and 11 parts water are permitted to stand for 1 hour. There is thereafter added to parts of this solution 37 parts of an approximately 40 percent vinylpyridin latex, such is allowed to stand for several hours, and then is subsequently thinned with water to an approximately 25 percent total solid content and a pI-I-value of 7.4 to 7.9.
  • the cylindrical jacket now formed at the drum is either vulcanized in a press for minutes at a steam pressure of four atmospheres gauge, or vulcanized with an externally bearing rubber membrane (inside 4 atmosphere gauge, outside 10 atmospheres gauge steam pressure) for 15 minutes.
  • the V-belts are removed in known manner from the vulcanized cylindrical jacket.
  • EXAMPLE II The V-belt back or top, preferably upon a separation foil, is initially built-up in the reverse manner from that described with respect to Example I. Initially a very wide meshed, diagonally cut polyamide fabric destined to serve as the cover layer, and which has been pre-prepared and imbued as described above for the fleece, is wound upon a forming core. In the same manner as in Example I, there are added the base plate, the cord winding and again a base plate. It has now been found advantageous, even though not absolutely necessary, if the thus formed pre-molded article is pre-vulcanized for about one-third of the above indicated vulcanization time.
  • the mold core containing the V-belt back and if desired likewise prevulcanized is inserted into an outer mold or form which forms the core volume of the later single core belt.
  • the core mixture is then now applied by means of injection or transfer molding.
  • a non-compacted fiber fleece which, however, need not necessarily be formed of polyamide fibers, rather depending upon the desired properties can consist of polyester fibers, glass fibers, cotton or the like.
  • a non-compacted fiber fleece which, however, need not necessarily be formed of polyamide fibers, rather depending upon the desired properties can consist of polyester fibers, glass fibers, cotton or the like.
  • Particularly interesting is the use of fleeces fonned of steel wool, as well as those formed of polyurethane fibers.
  • the fleece can be completely unoriented i.e. consist of randomly arranged fibers. If there is present a light or more pronounced orientation, then such preferably should only be present in one direction, whereby the orientation of the fibers of the fleece during formation of the V-belt should be transverse to its travel direction.
  • an interesting reinforcement effect of the cover layer is additionally provided.
  • the mesh width should be so large that the rubber layers provided at both sides of the wide meshed fabric are completely riveted to one another through a sufficient large number of cross or transverse connections. Naturally this is dependent upon the thickness of the threads or fibers, the orientation of the fibers and the plasticity of the mixture.
  • the previously mentioned imbuing mixture can be, for instance, applied to a polyamide fabric of a surface weight 200 g/m formed of fibers of 840 denier with a fiber arrangement of fibers per 10 centimeters in the warp and weft.
  • the fabric is preferably cut at an angle of 45, in order to ensure a sufficient elasticity and symmetry for the layer.
  • the angles can also be smaller than 45, however preferably not smaller than 10.
  • the elastomer especially for the core mixture, apart from the previously known rubber mixtures and the chloroprene qualities described previously there can also be conceivably used polyurethane elastomers.
  • one is preferably concerned with linked products which, as in the examples described are connected in a build-up technique or, however, in an injection molding or casting technique, with the reinforcement inserts and the cover layers, whereby in the last-mentioned situation there can be employed a relatively thin-liquid two component mixture.
  • the preparation for the fleece or the wide meshed fabric for the cover layer as well as for the reinforcement inserts should be appropriately compatible with polyurethane, and can for instance be formed on a isocyanate basis.
  • Suitable for the reinforcement inserts 2 of the invention are polyester cords as well as glass cords. It is here also remarked that the top cover layer serves as protection for the cords against external mechanical influences. The cord cannot be situated completely at the outside of the belt for reasons of deformation, rather must be located in the so-called neutral zone. Moreover, the back or top region of the belt must possess a certain rigidity or stiffness in order that it does not tend to assume a concave configuration when it is trained about the belt pulleys. As a general rule, the reinforcement cords are located approximately 1 to 2 mm beneath the upper external edges of the V-belt. Additionally, it is here mentioned that the core mixture should be electrically conductive owing to the static charge.
  • the inner core In conventional belts with a wrapper the inner core must not be conductive, although the wrapper or enclosure should be, and specifically possesses a resistance of 10 ohms.
  • the core mixture of the present invention possesses an electrical resistance of only 10 to 10 ohms. This is attributable to the relatively large amount of carbon black.
  • the base cover layer 5 does not contain fleece, much less a fabric, because neither one or the other of these materials can be readily dammed-up or compressed. Yet, during deflection of the belt about belt pulleys possessing a small diameter, experience has shown that the base cover layer tends to markedly compress or dam-up.
  • a raw-edged V-belt comprising at least a top cover layer, reinforcement insert means disposed beneath said top cover layer, and a substantially trapezoidal-shaped core located beneath said reinforcement insert means, said top cover layer being formed of a material selected from the group consisting essentially of fiber fleece and wide-meshed fabric, completely impregnated with an elastomer.
  • V-belt as defined in claim 1, wherein the V-belt contains an elastomer incorporating a sulphurmodified chloroprene.
  • a raw-edged V-belt comprising at least a top cover layer, reinforcement insert means disposed beneath said top cover layer, and a substantially trapezoidal-shaped core located beneath said reinforcement insert means, said top cover layer being formed of fiber fleece impregnated with an elastomer.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Belt Conveyors (AREA)
  • Reinforced Plastic Materials (AREA)
US91984A 1969-12-03 1970-11-23 V-belt Expired - Lifetime US3667308A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT1126769A AT305709B (de) 1969-12-03 1969-12-03 Keilriemen und Verfahren zu seiner Herstellung

Publications (1)

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US3667308A true US3667308A (en) 1972-06-06

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Application Number Title Priority Date Filing Date
US91984A Expired - Lifetime US3667308A (en) 1969-12-03 1970-11-23 V-belt

Country Status (8)

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US (1) US3667308A (xx)
AT (1) AT305709B (xx)
BE (1) BE759825A (xx)
CH (1) CH528687A (xx)
CS (1) CS162626B2 (xx)
DE (1) DE2058764B2 (xx)
FR (1) FR2072729A5 (xx)
GB (1) GB1281850A (xx)

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3800611A (en) * 1973-01-10 1974-04-02 Dayco Corp Endless power transmission belt
US3857295A (en) * 1973-05-11 1974-12-31 Dayco Corp Trapezium power transmission belt
US3919025A (en) * 1972-12-11 1975-11-11 Dayco Corp Endless power transmission belt and method of making same
US3930417A (en) * 1974-07-30 1976-01-06 Dayco Corporation Endless power transmission belt structure and method of making same
US4296640A (en) * 1978-12-16 1981-10-27 Mitsuboshi Belting Ltd. Power transmission V-belt and method of manufacture
JPS59110944A (ja) * 1982-12-15 1984-06-27 Bando Chem Ind Ltd 伝動ベルト
US5173361A (en) * 1990-01-22 1992-12-22 Nippon Steel Chemical Co. Stainless steel fiber reinforced composite belt
US5181890A (en) * 1989-12-22 1993-01-26 Pirelli Trasmissioni Industriali S.P.A. Elastic driving belt and process for identifying and detecting residual elastic elongations in said belt stretched between two pulleys
US6056656A (en) * 1997-03-04 2000-05-02 Bando Chemical Industries, Ltd. V-ribbed belt
US20030129350A1 (en) * 2002-01-08 2003-07-10 Foster Jon S. Thermally conductive drive belt
US6770004B1 (en) * 1999-03-26 2004-08-03 The Goodyear Tire & Rubber Company Electrically conductive timing belt
US20060293140A1 (en) * 2005-06-27 2006-12-28 Daugherty Jerome M Banded power transmission V-belt
US20100133046A1 (en) * 2007-03-12 2010-06-03 Inventio Ag Elevator system, suspension element for an elevator system, and device for manufacturing a suspension element
US20100197435A1 (en) * 2009-02-03 2010-08-05 The Gates Corporation Belt with Wear-Resistant Anti-Static Fabric
US20120015187A1 (en) * 2005-09-13 2012-01-19 O'donnell Hugh Method of making a load bearing member for an elevator system
US9829066B2 (en) 2014-04-07 2017-11-28 Gates Corporation Electrically conductive power transmission belt

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2194269A5 (xx) * 1972-07-28 1974-02-22 Kleber Colombes
AT385568B (de) * 1982-10-20 1988-04-25 Winkler Roderich Ing Keilriemen aus verschweiss- oder verklebbaren elastomeren und verfahren zum endlosschliessen eines derartigen keilriemens
JPS6136534A (ja) * 1984-07-26 1986-02-21 Mitsuboshi Belting Ltd Ｖリブドベルト
IL90363A (en) * 1989-05-22 1992-03-29 Volta Power Belting Ltd Method and device for producing endless drive belts
US5129866A (en) * 1989-05-22 1992-07-14 Fenrir Ag Method and device for producing endless drive belts
DE19649931C1 (de) * 1996-12-02 1998-04-30 Contitech Antriebssysteme Gmbh Zahnriemen und Verfahren zu seiner Herstellung
DE19851761B4 (de) * 1998-11-10 2014-10-09 Arntz Beteiligungs Gmbh & Co. Kg Antriebsriemen
AU758487C (en) * 1999-11-12 2003-09-11 Gates Corporation, The Power transmission belt using stabilized open mesh textile material in overcord for enhanced rubber penetration

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2526324A (en) * 1944-08-08 1950-10-17 Lockheed Aircraft Corp Power transmitting belt
US2631463A (en) * 1946-11-12 1953-03-17 Dayton Rubber Company Cord belt
US2690985A (en) * 1951-06-02 1954-10-05 Goodyear Tire & Rubber Belt
US2739090A (en) * 1946-11-12 1956-03-20 Dayton Rubber Company Cord belts
US3164026A (en) * 1962-10-03 1965-01-05 Dayco Corp Transmission belt and method of manufacture
US3190137A (en) * 1958-10-28 1965-06-22 Raybestos Manhattan Inc Rubber faced belt with fiber traction surface
US3566706A (en) * 1968-06-25 1971-03-02 Sidney R Fix Power transmission belt

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2526324A (en) * 1944-08-08 1950-10-17 Lockheed Aircraft Corp Power transmitting belt
US2631463A (en) * 1946-11-12 1953-03-17 Dayton Rubber Company Cord belt
US2739090A (en) * 1946-11-12 1956-03-20 Dayton Rubber Company Cord belts
US2690985A (en) * 1951-06-02 1954-10-05 Goodyear Tire & Rubber Belt
US3190137A (en) * 1958-10-28 1965-06-22 Raybestos Manhattan Inc Rubber faced belt with fiber traction surface
US3164026A (en) * 1962-10-03 1965-01-05 Dayco Corp Transmission belt and method of manufacture
US3566706A (en) * 1968-06-25 1971-03-02 Sidney R Fix Power transmission belt

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3919025A (en) * 1972-12-11 1975-11-11 Dayco Corp Endless power transmission belt and method of making same
US3800611A (en) * 1973-01-10 1974-04-02 Dayco Corp Endless power transmission belt
US3857295A (en) * 1973-05-11 1974-12-31 Dayco Corp Trapezium power transmission belt
US3930417A (en) * 1974-07-30 1976-01-06 Dayco Corporation Endless power transmission belt structure and method of making same
US4296640A (en) * 1978-12-16 1981-10-27 Mitsuboshi Belting Ltd. Power transmission V-belt and method of manufacture
JPS59110944A (ja) * 1982-12-15 1984-06-27 Bando Chem Ind Ltd 伝動ベルト
JPS6146698B2 (xx) * 1982-12-15 1986-10-15 Bando Chemical Ind
US5181890A (en) * 1989-12-22 1993-01-26 Pirelli Trasmissioni Industriali S.P.A. Elastic driving belt and process for identifying and detecting residual elastic elongations in said belt stretched between two pulleys
US5173361A (en) * 1990-01-22 1992-12-22 Nippon Steel Chemical Co. Stainless steel fiber reinforced composite belt
US6056656A (en) * 1997-03-04 2000-05-02 Bando Chemical Industries, Ltd. V-ribbed belt
US6770004B1 (en) * 1999-03-26 2004-08-03 The Goodyear Tire & Rubber Company Electrically conductive timing belt
US20030129350A1 (en) * 2002-01-08 2003-07-10 Foster Jon S. Thermally conductive drive belt
US20040222546A1 (en) * 2002-01-08 2004-11-11 Foster Jon S. Method of manufacturing athermally conductive drive belt
US6919115B2 (en) * 2002-01-08 2005-07-19 Cool Options, Inc. Thermally conductive drive belt
US7521009B2 (en) 2002-01-08 2009-04-21 Cool Options, Inc. Method of manufacturing athermally conductive drive belt
US20060293140A1 (en) * 2005-06-27 2006-12-28 Daugherty Jerome M Banded power transmission V-belt
US7942773B2 (en) * 2005-06-27 2011-05-17 The Gates Corporation Ip Law Dept. Banded power transmission V-belt
US20120015187A1 (en) * 2005-09-13 2012-01-19 O'donnell Hugh Method of making a load bearing member for an elevator system
US20100133046A1 (en) * 2007-03-12 2010-06-03 Inventio Ag Elevator system, suspension element for an elevator system, and device for manufacturing a suspension element
US20100197435A1 (en) * 2009-02-03 2010-08-05 The Gates Corporation Belt with Wear-Resistant Anti-Static Fabric
US8192316B2 (en) * 2009-02-03 2012-06-05 The Gates Corporation Belt with wear-resistant anti-static fabric
US9829066B2 (en) 2014-04-07 2017-11-28 Gates Corporation Electrically conductive power transmission belt

Also Published As

Publication number Publication date
DE2058764A1 (de) 1971-06-09
GB1281850A (en) 1972-07-19
FR2072729A5 (xx) 1971-09-24
DE2058764B2 (de) 1979-09-20
AT305709B (de) 1973-03-12
BE759825A (fr) 1971-05-17
CH528687A (de) 1972-09-30
CS162626B2 (xx) 1975-07-15

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