CA1253360A - V-belt for high load power transmission - Google Patents
V-belt for high load power transmissionInfo
- Publication number
- CA1253360A CA1253360A CA000506032A CA506032A CA1253360A CA 1253360 A CA1253360 A CA 1253360A CA 000506032 A CA000506032 A CA 000506032A CA 506032 A CA506032 A CA 506032A CA 1253360 A CA1253360 A CA 1253360A
- Authority
- CA
- Canada
- Prior art keywords
- belt
- power transmission
- rubber
- fibers
- embedded
- 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
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Abstract
Abstract of the Disclosure A power transmission V-belt for transmitting high loads with extended useful life. The por-tion of the V-belt in which the tensile elements thereof are embedded is formed of a rubber having short reinforcing fibers distributed therein and oriented longitudinally of the belt. Different embodiments of both wrapped and raw edge belts em-bodying the invention are disclosed. Embodiments in which the outermost portion of the tension sec-tion and the innermost portion of the compression section are free of the longitudinally extending short fibers are also disclosed. Preferred amounts of the short fiber material and the hard-ness of the rubber are disclosed.
Description
~253~
V-BELT FOR HIGH LOAD POWER TRANSMISSION
Technical Field This invention relates to power transmission belts and in particular to V-belts intended for high power transmission service.
Back~round Art In one common form of V-belt for use in transmitting power as between pulleys, a plurality of longitudinally extending tensile cords are em-bedded in a layer of cushion rubber. An outer tension section of rubber is provided outwardly of the cushion rubber and an inner compression section of rubber is provided înwardly of the cushion rubber~
It is further conventional to cover the belt with a fabric, such as canvas. The canvas may completely encircle the belt, or may be applied only to ~he inner surface and outer surface there-of, with the sides of the belt defining raw edges.
A serious problem arises in the use of suchconventional belts where hi8h loads are transmit-ted.' The stresses developed in the belt us a re-sult of the high load trflnsmission causes cracking to occur. Both longitudinal crccks and side cracks have been found to extend through the cushion rubber in which the tensile cords sre em-bedded. Such cracks propagate to and into both the tension ~nd compression sections of the belt, thereby substantially reducing the useful life of the belt.
l;~S33~0 One attempted 601ution to thiq problem has been to provide 8 distribution of short reinforc-ing fibers extending tr~nsve~sely scro~s the belt in either or both of the compression and ten~lon sections. Conventionally, approximately 5 to 10 parts by weight of such fibers sre provlted in such sections. While 6uch a distribution of reinforcing fibers does incre~se the rigidity in the transverse directlon, the use of such fibers has been found to cause the belt to be harder than desired. Bec2use of the increase in the hardness, the pre~ention of cracks by such means is not completely satis~actory.
The inventor~ hereof have proposed previous-ly, as disclosed in laid open Japanese Utility Model Appli-cation No. 60144/1979, the provision of a small amount of such short fibers, such as 0.1 to 3.0 parts by weight, in the compression rubber ~ec-tion, ~s illustr~ted herein. It has been.
found that such construction dQes provide an im-proved long life by affording a limited de8ree of desired rigldity in the compression section.
Such structure h~s been found, howeve~, to be n~t completely sati~factory in extendi~ng the useful l~fe of such belts bec~use of the ~hifting of the ten~ile cords 80 th~t the ~pAcing therebetween became irregular and ~ome superposition occurred.
A
~Li253360 Disclosure of Invention _ The present invention comprehends an improved V-belt structure which overcomes the deficiencles of the prior art structures in a novel and simple manner and provides substantially improved long, troublefree life of such a V-belt, notwithstanding the transmission of high loads thereby.
The improved V-belt construction of the present invention provides improved resistance to bending and cracking and unexpectedly provides improved transverse stability under severe high load conditions.
The belt construction is extremely simpie and economical, while yet providing the improved durability and long life.
More specifically, the invention comprehends the provision of such a power transmission V-belt wherein the portion of the belt in which the tensile elements are embedded is formed of rubber having short reinforcing fibers distributed therein and oriented longitudinally of the belt.
In one aspect of the invention, the fibers are present in the ratio of less than 5 parts to 100 parts o~ the rubber, preEerably approximately 0.1 to 3.0 paxts Eibers to 100 parts rubber.
In another aspect the rubber in which the tensile cords are embedded i5 caused to have preferably a ShoreA hardness of approximately 70 to 90.
The tensile cords may be formed of conventional strong filamentary material. In the illustrated embodiment, the fibers have a length of approximately 2 mm to 20 mm and may 3G be formed of suitable reinforcing material, such as natural fiber, artificial fiber, synthetic fiber, and inorganic fiber materials.
i~253~
In the illustrated embodiment, ~he fibess comprise cut fibers.
A rubberized ~abric cover may be provided on the inner and outer surfaces and also may be se-lectively provided on the side edges, as desired.
The fabric cover, in the illustrated embodi-ment, is made up of bias-laid plies, with the warps and wefts thereof disposed at a 90 to 140 crossinp angle. The plies are preferably bias-laid.
In the disclosed embodiments, at least oneof the outermost portion of the tension section and the innermost portion of the compression sec-tion is caused to be free of the longitudinally extending short fibers.
The invention comprehends that the entire belt body be formed of rubber having short rein-forcing fibers distributed therein and oriented longitudinally of the belt, as desired. In all embodiments of the invention, the portion of the belt in which the tensile cords are embedded is provided with the lon~itudinally extending short fibers.
Brief Description of the Drawin~
,Other features and advantages of the inven tion will be apparent from the followin~ descrip-tion taken in connection with the accompanyin~
drawing wherein:
FIGURE 1 is a schematic illustration of A
drive belt embodying the invention, as used in transmit~in~ power between a driver pulley and a driven pulley;
FIGURE 2 is a fragmentary perspective view :1~5~
of a portion of a belt embodying the invention;
FIGURE 3 is a transverse section illustrating ~a modified form of belt embodying the invention;
FIGURE 4 is a transverse section illustrating another modified form of belt embodying the inven-ti~;
FIG~RE 5 is a transverse section illustrating still another form of belt embodying the inven-tion;
FIGURE 6 is a transverse section illustrating a still further belt embodying the invention;
FIGURE 7 is a transverse section illustrating yet another belt embodying ~he invention;
FIGURE 8 is a transverse section illustrating a conventional prior art belt; and FIGURE 9 is a transverse section illustrating a prior art belt developed by applicants herein.
Best Mode for CarryinR Out the Invention In the illustrative embodiments of the inven-tion as disclosed in the drawing, 8 power trans-mission belt generally designated lO embodying the invention is illustrated as for use in transmit-ting high loads between a driver pulley 11 and a driven pulley 12. As discussed briefly above, the belt of the present invention is adapted to pro-vide such high load power transmission with an extended useful life.
As shown in Figure 2, power transmission belt lO comprises a V-belt having a plurality of ten-sile cords 13 extending longitudin~lly of the beltin side-by-side spaced relationship transversely thereof. The tensile cords are embedded between an outer tension section 14 and an inner compres-lZS3~6~
sion section 15. In the illustrated embodiment,the tension and compression sections are formed of similar rubber and are integrally joined be-tween ~he tensile cords, whereby the belt body generally designated 16 comprises aD integral uni-tary construction.
As further illustrated in Figure 2, a distri-bution of short reinforcing fibers 17 is provided throughout the belt body. More specifically, the invention comprehends that ~he longitudinally ex-tending short reinforcin~ fibers be provided in the rubber in which the tensile cords are embedded within the belt body.
Belt 10 is provided with an outer cover fab-ric 18 which may fully encircle the belt and thuscover the top surface 19 of the tension section, the bottom surface 20 of the compression section, and the side edges 21. The belt rubber may com-prise conventional power transmission belt rubber which may be blend of a natural rubber, chloro-prene rubber, and/or styrene butadiene rubber.
The tensile cords are preferably formed of conventional tensile cord material, such as poly-ester resin, aliphatic polyamide resin, aromatic polyamide resin, etc.
The rubber preferably has a Shore A hardness of 70 ~o 90 The short fibers 17 are preferflbly cut fibers formed of natural fiber, artificial fiber, synthetic fiber, inorganic fiber, etc., and in the illustrated embodiment, have a length of ap-proximately 2 mm to 20 mm.
The cut fibers are provided in the belt 10 in a ratio of ~pproximately 0.1 to 3.0 parts by 1~533~0 weight of the rubber.
The fabric 18 may comprise a canvas fabric.
The fabric may be formed with one or more plies, with the warps and wefts of the plies being formed of cotton yarns, blended yarns of cotton and nylon yarns, blended yarns of cotton yarns and polyester yarns, etc. The plies are woven st a wide crossing angle of approximately 90 to 140 and, in the illustrated embodiment, are laminated and bonded to the rubber body with rubber in a bias direction.
It has been found that by utilizing both the longitudinally oriented short fibers in the rubber in which the tensile cords are embedded, and pro-viding the rubber as a relatively hard rubber, maximum extension of useful life of the belt is obtained, with minimized cracking snd desirable bending durability with reduced belt-degrading heating during use of the drive system.
Referring now to the embodiments of Figures 3-7, the invention comprehends a number of modi-fications within the broad scope thereof providing improved long, troublefree life of the belt under high load conditions.
As seen in Figure 3, a modified form of belt generally designated 110 embodying the invention is shown to comprise a belt similar to belt 10 but wherein the innermost portion 122 of the compres-sion section 115 is free of the longitudinally extending cut fibers 117.
Another belt embodying the invention general-ly designated 210 is shown in Figure 4 to comprise a belt gener~lly similar to belt 10, but wherein both the outermost portion 223 of the tension i~S3360 section and the innermost portio~ 222 o~ the co~-pression sectio~ sre provided ~ree of the longi-tudinally extending cu~ fibers 217.
As further illustrated in Figure 4, the ex-tent of the cut fiber-free portions of the ten~ion and compression sections outwsrdly and inwardly of the portion of the belt in which the tensile cords are e~bedded uay be selected, ~B desired, within the broad scope of the invention.
In Figure 5, stiil another form of belt gen-erally designated 310 embodyin~ the i~vention is shown to cGmprise a belt similar to belt 10, but wherein the s~de edges 321. comprise raw ed~es, with the cover ~sbric 318 being provided only on the outer surface 319 of the tension section and the inner surface 320 of the compression section.
Still another form of the inve~tion generally designated 410 is illustrated in Figure 6 to com-prise a belt similar to belt 110, but wherein the side ed~es 421 of the belt comprises r~w edges.
A belt generally design~ted 510 ls illustra-ted in Figure 7 to comprise a belt generally sim-ilar to belt 210, but wherein the si~e ed8es 521 thereof comprise raw ed8es~
The unexpected extended useful life .of the power transmission belts e~bodying the inventlon is illustrated in the following T~ble 1, whereln the belt 10 i9 shown to bave a ~ubstsnti~lly in-creased useful life over the convention and 3~ prior art belts of Figures 8 and 9. As seen in Figure 9, applicant's prior art structure referred to previously on page 2 required the conventional use o a cushion rubber layer embedding the tensile cords in addition to the compression section provided with the longitudinally extending short fibers and the conventional outer tension section. In determining the comparison of useful life, the belts were driven. in a drive system, as shown in Figure 1, wherein the driver pulley was 80 mm in diameter, the driven pulley was 74 mm in diameter, with the driver pulley A
,.
~S~3~;Q
being rotsted at 8 speed of 3600 rpm. 6 PS of load and lO0 kg of initial load were applied.
Conventic nal belts Belt 10 Belt A Belt B
(Fig. 2) (Fig.8) (Fig.9) Running life (Hrs) Before side487 143 260 cracking As shown in Table 1, the provision of the longitudinally extending short fibers in the portion of the rubber body in which the tensile cords are embedded provides an unexpectedly sub-stantial increase in the useful life of the belt.
The provision of the longitudinally extending short fibers in the portion of the rubber in which the tensile cords is embedded has been un-expectedly found to provide desirable transverse side pressure durability under high loads, while yet providing desirable bending and crack resis-tance under such high loads.
By substantially extending the useful life of the belt before side cracking occurs, loweretl maintenance Hnd parts costs provide a highly meri-torious improvement in the power transmission of high loads in such pulley systems.
The foregoing disclosure of specific embodi-ments is illustrative of the broad inventive con-cepts comprehended by the invention.
V-BELT FOR HIGH LOAD POWER TRANSMISSION
Technical Field This invention relates to power transmission belts and in particular to V-belts intended for high power transmission service.
Back~round Art In one common form of V-belt for use in transmitting power as between pulleys, a plurality of longitudinally extending tensile cords are em-bedded in a layer of cushion rubber. An outer tension section of rubber is provided outwardly of the cushion rubber and an inner compression section of rubber is provided înwardly of the cushion rubber~
It is further conventional to cover the belt with a fabric, such as canvas. The canvas may completely encircle the belt, or may be applied only to ~he inner surface and outer surface there-of, with the sides of the belt defining raw edges.
A serious problem arises in the use of suchconventional belts where hi8h loads are transmit-ted.' The stresses developed in the belt us a re-sult of the high load trflnsmission causes cracking to occur. Both longitudinal crccks and side cracks have been found to extend through the cushion rubber in which the tensile cords sre em-bedded. Such cracks propagate to and into both the tension ~nd compression sections of the belt, thereby substantially reducing the useful life of the belt.
l;~S33~0 One attempted 601ution to thiq problem has been to provide 8 distribution of short reinforc-ing fibers extending tr~nsve~sely scro~s the belt in either or both of the compression and ten~lon sections. Conventionally, approximately 5 to 10 parts by weight of such fibers sre provlted in such sections. While 6uch a distribution of reinforcing fibers does incre~se the rigidity in the transverse directlon, the use of such fibers has been found to cause the belt to be harder than desired. Bec2use of the increase in the hardness, the pre~ention of cracks by such means is not completely satis~actory.
The inventor~ hereof have proposed previous-ly, as disclosed in laid open Japanese Utility Model Appli-cation No. 60144/1979, the provision of a small amount of such short fibers, such as 0.1 to 3.0 parts by weight, in the compression rubber ~ec-tion, ~s illustr~ted herein. It has been.
found that such construction dQes provide an im-proved long life by affording a limited de8ree of desired rigldity in the compression section.
Such structure h~s been found, howeve~, to be n~t completely sati~factory in extendi~ng the useful l~fe of such belts bec~use of the ~hifting of the ten~ile cords 80 th~t the ~pAcing therebetween became irregular and ~ome superposition occurred.
A
~Li253360 Disclosure of Invention _ The present invention comprehends an improved V-belt structure which overcomes the deficiencles of the prior art structures in a novel and simple manner and provides substantially improved long, troublefree life of such a V-belt, notwithstanding the transmission of high loads thereby.
The improved V-belt construction of the present invention provides improved resistance to bending and cracking and unexpectedly provides improved transverse stability under severe high load conditions.
The belt construction is extremely simpie and economical, while yet providing the improved durability and long life.
More specifically, the invention comprehends the provision of such a power transmission V-belt wherein the portion of the belt in which the tensile elements are embedded is formed of rubber having short reinforcing fibers distributed therein and oriented longitudinally of the belt.
In one aspect of the invention, the fibers are present in the ratio of less than 5 parts to 100 parts o~ the rubber, preEerably approximately 0.1 to 3.0 paxts Eibers to 100 parts rubber.
In another aspect the rubber in which the tensile cords are embedded i5 caused to have preferably a ShoreA hardness of approximately 70 to 90.
The tensile cords may be formed of conventional strong filamentary material. In the illustrated embodiment, the fibers have a length of approximately 2 mm to 20 mm and may 3G be formed of suitable reinforcing material, such as natural fiber, artificial fiber, synthetic fiber, and inorganic fiber materials.
i~253~
In the illustrated embodiment, ~he fibess comprise cut fibers.
A rubberized ~abric cover may be provided on the inner and outer surfaces and also may be se-lectively provided on the side edges, as desired.
The fabric cover, in the illustrated embodi-ment, is made up of bias-laid plies, with the warps and wefts thereof disposed at a 90 to 140 crossinp angle. The plies are preferably bias-laid.
In the disclosed embodiments, at least oneof the outermost portion of the tension section and the innermost portion of the compression sec-tion is caused to be free of the longitudinally extending short fibers.
The invention comprehends that the entire belt body be formed of rubber having short rein-forcing fibers distributed therein and oriented longitudinally of the belt, as desired. In all embodiments of the invention, the portion of the belt in which the tensile cords are embedded is provided with the lon~itudinally extending short fibers.
Brief Description of the Drawin~
,Other features and advantages of the inven tion will be apparent from the followin~ descrip-tion taken in connection with the accompanyin~
drawing wherein:
FIGURE 1 is a schematic illustration of A
drive belt embodying the invention, as used in transmit~in~ power between a driver pulley and a driven pulley;
FIGURE 2 is a fragmentary perspective view :1~5~
of a portion of a belt embodying the invention;
FIGURE 3 is a transverse section illustrating ~a modified form of belt embodying the invention;
FIGURE 4 is a transverse section illustrating another modified form of belt embodying the inven-ti~;
FIG~RE 5 is a transverse section illustrating still another form of belt embodying the inven-tion;
FIGURE 6 is a transverse section illustrating a still further belt embodying the invention;
FIGURE 7 is a transverse section illustrating yet another belt embodying ~he invention;
FIGURE 8 is a transverse section illustrating a conventional prior art belt; and FIGURE 9 is a transverse section illustrating a prior art belt developed by applicants herein.
Best Mode for CarryinR Out the Invention In the illustrative embodiments of the inven-tion as disclosed in the drawing, 8 power trans-mission belt generally designated lO embodying the invention is illustrated as for use in transmit-ting high loads between a driver pulley 11 and a driven pulley 12. As discussed briefly above, the belt of the present invention is adapted to pro-vide such high load power transmission with an extended useful life.
As shown in Figure 2, power transmission belt lO comprises a V-belt having a plurality of ten-sile cords 13 extending longitudin~lly of the beltin side-by-side spaced relationship transversely thereof. The tensile cords are embedded between an outer tension section 14 and an inner compres-lZS3~6~
sion section 15. In the illustrated embodiment,the tension and compression sections are formed of similar rubber and are integrally joined be-tween ~he tensile cords, whereby the belt body generally designated 16 comprises aD integral uni-tary construction.
As further illustrated in Figure 2, a distri-bution of short reinforcing fibers 17 is provided throughout the belt body. More specifically, the invention comprehends that ~he longitudinally ex-tending short reinforcin~ fibers be provided in the rubber in which the tensile cords are embedded within the belt body.
Belt 10 is provided with an outer cover fab-ric 18 which may fully encircle the belt and thuscover the top surface 19 of the tension section, the bottom surface 20 of the compression section, and the side edges 21. The belt rubber may com-prise conventional power transmission belt rubber which may be blend of a natural rubber, chloro-prene rubber, and/or styrene butadiene rubber.
The tensile cords are preferably formed of conventional tensile cord material, such as poly-ester resin, aliphatic polyamide resin, aromatic polyamide resin, etc.
The rubber preferably has a Shore A hardness of 70 ~o 90 The short fibers 17 are preferflbly cut fibers formed of natural fiber, artificial fiber, synthetic fiber, inorganic fiber, etc., and in the illustrated embodiment, have a length of ap-proximately 2 mm to 20 mm.
The cut fibers are provided in the belt 10 in a ratio of ~pproximately 0.1 to 3.0 parts by 1~533~0 weight of the rubber.
The fabric 18 may comprise a canvas fabric.
The fabric may be formed with one or more plies, with the warps and wefts of the plies being formed of cotton yarns, blended yarns of cotton and nylon yarns, blended yarns of cotton yarns and polyester yarns, etc. The plies are woven st a wide crossing angle of approximately 90 to 140 and, in the illustrated embodiment, are laminated and bonded to the rubber body with rubber in a bias direction.
It has been found that by utilizing both the longitudinally oriented short fibers in the rubber in which the tensile cords are embedded, and pro-viding the rubber as a relatively hard rubber, maximum extension of useful life of the belt is obtained, with minimized cracking snd desirable bending durability with reduced belt-degrading heating during use of the drive system.
Referring now to the embodiments of Figures 3-7, the invention comprehends a number of modi-fications within the broad scope thereof providing improved long, troublefree life of the belt under high load conditions.
As seen in Figure 3, a modified form of belt generally designated 110 embodying the invention is shown to comprise a belt similar to belt 10 but wherein the innermost portion 122 of the compres-sion section 115 is free of the longitudinally extending cut fibers 117.
Another belt embodying the invention general-ly designated 210 is shown in Figure 4 to comprise a belt gener~lly similar to belt 10, but wherein both the outermost portion 223 of the tension i~S3360 section and the innermost portio~ 222 o~ the co~-pression sectio~ sre provided ~ree of the longi-tudinally extending cu~ fibers 217.
As further illustrated in Figure 4, the ex-tent of the cut fiber-free portions of the ten~ion and compression sections outwsrdly and inwardly of the portion of the belt in which the tensile cords are e~bedded uay be selected, ~B desired, within the broad scope of the invention.
In Figure 5, stiil another form of belt gen-erally designated 310 embodyin~ the i~vention is shown to cGmprise a belt similar to belt 10, but wherein the s~de edges 321. comprise raw ed~es, with the cover ~sbric 318 being provided only on the outer surface 319 of the tension section and the inner surface 320 of the compression section.
Still another form of the inve~tion generally designated 410 is illustrated in Figure 6 to com-prise a belt similar to belt 110, but wherein the side ed~es 421 of the belt comprises r~w edges.
A belt generally design~ted 510 ls illustra-ted in Figure 7 to comprise a belt generally sim-ilar to belt 210, but wherein the si~e ed8es 521 thereof comprise raw ed8es~
The unexpected extended useful life .of the power transmission belts e~bodying the inventlon is illustrated in the following T~ble 1, whereln the belt 10 i9 shown to bave a ~ubstsnti~lly in-creased useful life over the convention and 3~ prior art belts of Figures 8 and 9. As seen in Figure 9, applicant's prior art structure referred to previously on page 2 required the conventional use o a cushion rubber layer embedding the tensile cords in addition to the compression section provided with the longitudinally extending short fibers and the conventional outer tension section. In determining the comparison of useful life, the belts were driven. in a drive system, as shown in Figure 1, wherein the driver pulley was 80 mm in diameter, the driven pulley was 74 mm in diameter, with the driver pulley A
,.
~S~3~;Q
being rotsted at 8 speed of 3600 rpm. 6 PS of load and lO0 kg of initial load were applied.
Conventic nal belts Belt 10 Belt A Belt B
(Fig. 2) (Fig.8) (Fig.9) Running life (Hrs) Before side487 143 260 cracking As shown in Table 1, the provision of the longitudinally extending short fibers in the portion of the rubber body in which the tensile cords are embedded provides an unexpectedly sub-stantial increase in the useful life of the belt.
The provision of the longitudinally extending short fibers in the portion of the rubber in which the tensile cords is embedded has been un-expectedly found to provide desirable transverse side pressure durability under high loads, while yet providing desirable bending and crack resis-tance under such high loads.
By substantially extending the useful life of the belt before side cracking occurs, loweretl maintenance Hnd parts costs provide a highly meri-torious improvement in the power transmission of high loads in such pulley systems.
The foregoing disclosure of specific embodi-ments is illustrative of the broad inventive con-cepts comprehended by the invention.
Claims (13)
1. In a power transmission V-belt for transmitting a high load, said V-belt comprising a belt body having an inner compression section and an outer tension section, and longitudinally extending tensile elements embedded in said V-belt between said sections, the improvement comprising the portion of said V-belt in which said tensile elements are embedded comprising hard rubber having short reinforcing fibers distributed therein and oriented longitudinally of the V-belt and present in the ratio of less than 5 parts to 100 parts of rubber by weight.
2. In a power transmission V-belt for transmitting a high load, said V-belt comprising a belt body having an inner compression section and an outer tension section, and longitudinally extending tensile elements embedded in said V-belt between said sections, the improvement comprising the portion of said V-belt in which said tensile elements are embedded comprising rubber having short reinforcing fibers distributed therein and oriented longitudinally of the V-belt, said fibers being present in the ratio of approximately 0.1 to 3.0 parts to 100 parts of rubber by weight.
3. In a power transmission V-belt for trans-mitting a high load, said V-belt comprising a belt body having an inner compression section and an outer tension section, and longitudinally ex-tending tensile elements embedded in said V-belt between said sections, the improvement comprising the portion of said V-belt in which said tensile elements are embedded comprising rubber having short reinforcing fibers distributed therein and oriented longi-tudinally of the V-belt, said fiber reinforced rubber Kaving a Shore A
hardness of approximately 70° to 90°.
hardness of approximately 70° to 90°.
4. The power transmission V-belt of claims 1, 2 or 3 wherein said tensile cords are formed of any one of the group of synthetic resins compris-ing polyester resin, aliphatic polyamide resin, and aromatic polyamide resin.
5. The power transmission V-belt of claims 1, 2 or 3 wherein said fibers have a length of approximately 2 mm to 20 mm.
6. The power transmission V-belt of claims 1, 2 or 3 wherein said fibers are formed of any one of the group of natural fiber, artificial fiber, synthetic fiber, and inorganic fiber.
7. The power transmission V-belt of claims 1, 2 or 3 wherein said fibers comprise cut fibers.
8. The power transmission V-belt of claims 1, 2 or 3 wherein a rubberized fabric cover is provided on said rubber portion.
9. The power transmission V-belt of claims 1, 2 or 3 wherein a rubberized fabric cover is provided on said rubber portion, said fabric cover comprising bias-laid plies.
10. The power transmission V-belt of claims 1, 2 or 3 wherein a rubberized fabric cover is provided on said rubber portion, said fabric cover being defined by at least one ply having warps and wefts disposed at a 90° to 140° crossing angle.
11. The power transmission V-belt of claims 1, 2 or 3 wherein a rubberized fabric cover is provided on said rubber portion, said fabric cover being formed of yarns formed of any of the group consisting of cotton yarns, blended cotton and nylon yarns, and blended cotton and polyester yarns.
12. The power transmission V-belt of claims 1, 2 or 3 wherein at least one of the outermost portions of the tension section and the innermost portion of the compression section is free of said short fibers.
13. The power transmission V-belt of claims 1, 2 or 3 wherein the entire belt body is formed of rubber having short reinforcing fibers distributed therein and oriented longitudinally of the belt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000506032A CA1253360A (en) | 1986-04-07 | 1986-04-07 | V-belt for high load power transmission |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000506032A CA1253360A (en) | 1986-04-07 | 1986-04-07 | V-belt for high load power transmission |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1253360A true CA1253360A (en) | 1989-05-02 |
Family
ID=4132823
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000506032A Expired CA1253360A (en) | 1986-04-07 | 1986-04-07 | V-belt for high load power transmission |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1253360A (en) |
-
1986
- 1986-04-07 CA CA000506032A patent/CA1253360A/en not_active Expired
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |