GB2102849A - Improvements in driving belts - Google Patents
Improvements in driving belts Download PDFInfo
- Publication number
- GB2102849A GB2102849A GB08120766A GB8120766A GB2102849A GB 2102849 A GB2102849 A GB 2102849A GB 08120766 A GB08120766 A GB 08120766A GB 8120766 A GB8120766 A GB 8120766A GB 2102849 A GB2102849 A GB 2102849A
- Authority
- GB
- United Kingdom
- Prior art keywords
- fabric
- warp
- yarns
- weft insertion
- extensible
- 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- Withdrawn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
- 239000004744 fabric Substances 0.000 claims abstract description 39
- 238000003780 insertion Methods 0.000 claims abstract description 10
- 239000004677 Nylon Substances 0.000 claims description 7
- 229920001778 nylon Polymers 0.000 claims description 7
- 239000000835 fiber Substances 0.000 claims 1
- 230000000717 retained Effects 0.000 claims 1
- 229920001971 elastomer Polymers 0.000 abstract description 6
- 230000001360 synchronised Effects 0.000 abstract description 2
- 229920000728 polyester Polymers 0.000 description 4
- LOCYSVHOSYQGOV-UHFFFAOYSA-N N-hexyl-6-$l^{1}-azanyl-6-oxohexanamide Chemical compound [CH]CCCCCNC(=O)CCCCC([N])=O LOCYSVHOSYQGOV-UHFFFAOYSA-N 0.000 description 3
- 229920002302 Nylon 6,6 Polymers 0.000 description 3
- 238000009940 knitting Methods 0.000 description 3
- 238000011068 load Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- YACLQRRMGMJLJV-UHFFFAOYSA-N Chloroprene Chemical compound ClC(=C)C=C YACLQRRMGMJLJV-UHFFFAOYSA-N 0.000 description 2
- 239000004952 Polyamide Substances 0.000 description 2
- 229920000297 Rayon Polymers 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000004760 aramid Substances 0.000 description 2
- 229920003235 aromatic polyamide Polymers 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000003365 glass fiber Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229920002647 polyamide Polymers 0.000 description 2
- 239000011528 polyamide (building material) Substances 0.000 description 2
- 239000002964 rayon Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000002759 woven fabric Substances 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 238000010073 coating (rubber) Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000001419 dependent Effects 0.000 description 1
- 235000004879 dioscorea Nutrition 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 125000001145 hydrido group Chemical group *[H] 0.000 description 1
- 239000004761 kevlar Substances 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 229920001084 poly(chloroprene) Polymers 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
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
- F16G1/00—Driving-belts
- F16G1/28—Driving-belts with a contact surface of special shape, e.g. toothed
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04B—KNITTING
- D04B21/00—Warp knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes
- D04B21/14—Fabrics characterised by the incorporation by knitting, in one or more thread, fleece, or fabric layers, of reinforcing, binding, or decorative threads; Fabrics incorporating small auxiliary elements, e.g. for decorative purposes
Abstract
In a timing or like synchronous drive belt composed of cords, rubber backing, rubber teeth, fabric jacket and rubber facing, improved characteristics are obtained by using a novel fabric for the jacket. This fabric consists of a base fabric warp-knitted from fine, extensible yarns A and having incorporated in it at least one coarse, inextensible inlaid warp yarns B, C and an extensible weft insertion D. <IMAGE>
Description
1
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GB 2 102 849 A 1
SPECIFICATION Improvements in driving belts
The present invention relates to toothed surfaced driving belts and, more especially, to novel fabrics intended for use as covers or jackets for such belts.
Toothed belts are being increasingly used for transmitting synchronous drives, instead of sprocket chains, because of their smoother and quieter running, their lightness and cheapness, and their ability to absorb shock loads and to run without lubrication. Such belts may be used, for example, as timing belts for internal combustion engines. Conventional toothed belts consist of a tension member made of cords of steel, glass fibre, polyester or Kevlar, a rubber backing, moulded rubber teeth, and a rubberized fabric tooth facing. The tooth facing or jacket fabric is conventionally a woven fabric of polyamide fibres, in which the longitudinal members or warp threads are usually continuous filament nylon yarns and the transverse members or weft threads are highly stretchable continuous filament nylon yarns.
The ideal requirements for a cover fabric for a toothed driving belt include: rigidity (that is a resistance to distortion) in the warp direction, which facilitates manipulation during fabrication of the belt; substantial stretch in the weft direction to enable tooth contours to be followed; good flexibility in the weft direction; close thickness tolerance; low heat shrinkage at vulcanising temperatures; high bulk resilience; low moisture uptake; and good resistance to oils, abrasion and compression fatigue.
These requirements are only partially met by conventional woven jacket fabrics. It is an object of the invention to provide improved fabrics and improved toothed belts incorporating such fabrics.
The fabrics according to this invention are composed of basic knitted structures with substantial warp inlays and weft insertions.
The knitted structure is preferably a warp knitted fabric of extensible, relatively fine continuous man-made filament yarns. There may be an inlaid warp of substantially inextensible and relatively coarse yarns to provide a high extension modulus in the warp direction. These may be composed of continuous man-made filament, such as nylon, polyester, aramid or rayon, or of spun polyamide, polyester, rayon or cotton or mixtures thereof.
in the weft direction, a high degree of stretch may be provided by a weft insertion of extensible yams of continuous man-made filaments.
Presently preferred aspects of the invention are defined in the accompanying claims but the disclosure of this specification as understood by those skilled in the art is not dependent thereon or limited thereby.
The fabric of the invention has advantages as a toothed belt cover material, as compared with conventional fabrics for this purpose, which include; greater stretchability, notably in the weft direction; lower bulk density; substantial dimensional stability in processing; absence of weft distortion and retention of soft handle in spread coating; and relative cheapness.
In the accompanying drawings:
Figure 1 is a cross-section of a toothed timing belt; and
Figures 2 and 3 are respectively an illustration and a knitting diagram of a fabric in accordance with this invention.
In the timing belt 10 shown in Figure 1, a tension member 11, which may comprise cords of steel, glass fibre, polyester or aramid, is backed by a rubber coating 12, for example of chloroprene and has on its other face teeth 13 moulded in rubber, also for example of chloroprene. The moulded teeth are covered by a jacket fabric 14 which conforms closely to the profile of the teeth and is covered by a chloroprene rubber layer 15.
The jacket fabric 14 may with advantage be a fabric in accordance with this invention, an example of which is shown in Figure 2. In the latter Figure, the warp knitted base fabric is formed of relatively fine, stretch nylon yarns A, the inlay warp is of relatively coarse, high modulus yarns B and C and the weft insertion of stretch nylon yarns D. The fabric may be made by conventional knitting techniques with warp inlay and weft insertion. After being knitted, the fabric should be finished to develop its stretch properties, by scouring in a slack condition, followed by hydro extraction and drying with minimal tension.
It may be incorporated in a timing belt, such as that of Figure 1 by known procedures.
Example
The following is one example of a fabric according to the invention, which is suitable for use as a timing belt jacket.
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2
GB 2 102 849 A 2
Fabric structure: As Figure 2
Gauge: 18/2
Knitting warp: 78 dtex stretch nylon 66
Inlay warp: 1400 dtex nylon 66
Weft insertion: 2x78 dtex stretch nylon 66
Courses per inch (loom state): 40 (16 per cm)
Wales per inch (loom state): 19 (7.6 per cm)
Weight, loom state: 215g/m2
Weight, finished: 346 g/m2
10 The superior stretch properties which, together with its low bulk density and cheapness, gives the 10 fabric an advantage over conventional timing belt jacket fabrics, are illustrated by the following tabulated load/extension test results, in comparison with a typical conventional fabric. The test was conducted on 1 inch wide (25.4 mm) strips, 80 mm long, and in the weft direction only—the direction in which stretch is most important in the manufacture of timing belts.
15 Table 15
Load/extension characteristics for timing belt fabrics (weft direction)
Load (Kg/in.)
Extension (%)
Typical woven fabric
Knitted fabric (Fig. 2)
10
81
128
20
95
152
30
106
168
40
117
181
50
129
195
60
149
207
70
169
218
80
—■
233
An example of a fabric structure, eminently suitable for use in the jacket of a timing belt as described above, is shown in Figure 2 of the drawing.
20 In this Figure, A is an extensible knitted warp yarn, preferably with a resultant count in the range 20
78—500 dtex. B and C are inextensible warp inlay yarns, preferably with resultant counts in the range 110—4400 dtex. D is an extensible weft insertion yarn, preferably with a resultant count of 78—1100 dtex.
In the diagram of Figure 2, the threading of the machine is as follows:
25 A=Bar 1—Full 25
B=Bar2—Full C=Bar 3—Full D=weft
The machine gauge range is preferably between 44/2 and 6/2 gauge,
30 The warp direction yarns follow the arrangement: 30
A
B
C
2
0
0
0
0
0
4
4
2
6
4
2
2
0
0
0
0
0
4
2
4
6
2
4
35 6 4 2 35
40 The fabric structure shown in Figure 2 is believed to be novel in its own right. Thus although 40
when produced from yarns of the type described above, it is particularly suited to the production of driving belt jackets, it can equally be produced from yarns of different (for example inextensible) characteristics and so be suited to other end uses.
3
GB 2 102 849 A 3
Claims (6)
1. A fabric for use as a cover fabric for a toothed driving belt, which comprises a warp knitted base fabric formed from relatively fine extensible yarns of continuous man-made filaments, and at least one relatively coarse inextensible inlaid warp and an extensible weft insertion incorporated in and
5 retained by the knitted base fabric. 5
2. A fabric according to claim 1 wherein the inlaid warp or warps are composed of continuous filament or spun fibre yarns and the weft insertion yarn is composed of continuous man-made filaments.
3. A fabric according to claim 2 wherein the knitted warp and weft insertion are of stretch nylon
10 and the inlaid warp of high modulus nylon. 10
4. A toothed driving belt in which the teeth are covered by a fabric according to claim 1 or 2.
5. A toothed driving belt substantially as described with reference to Figure 1 of the drawings.
6. A fabric substantially as described with reference to Figures 2 and 3 of the drawings.
Printed for Her Majesty's Stationery Office by the Courier Press, Leamington Spa, 1983. Published by the Patent Office, 25 Southampton Buildings, London, WC2A 1AY, from which copies may be obtained
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB08120766A GB2102849A (en) | 1981-07-06 | 1981-07-06 | Improvements in driving belts |
| EP82303543A EP0069589A3 (en) | 1981-07-06 | 1982-07-06 | Cover fabric for a toothed driving belt |
| JP11631482A JPS5870754A (en) | 1981-07-06 | 1982-07-06 | Fabric |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB08120766A GB2102849A (en) | 1981-07-06 | 1981-07-06 | Improvements in driving belts |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB2102849A true GB2102849A (en) | 1983-02-09 |
Family
ID=10523037
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB08120766A Withdrawn GB2102849A (en) | 1981-07-06 | 1981-07-06 | Improvements in driving belts |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0069589A3 (en) |
| JP (1) | JPS5870754A (en) |
| GB (1) | GB2102849A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4828909A (en) * | 1987-12-17 | 1989-05-09 | Highland Industries, Inc. | Elastomer-coated fabric products and process for producing the same |
| GB2312002A (en) * | 1997-07-08 | 1997-10-15 | Welbeck Uk Limited | Knitted hose reinforcement fabric |
| GB2317622A (en) * | 1996-09-28 | 1998-04-01 | Wright M & Sons Ltd | Anti-ballistic fabric |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6039460A (en) * | 1983-08-09 | 1985-03-01 | Teijin Ltd | Base cloth for tufted mat |
| AU560567B2 (en) * | 1983-10-12 | 1987-04-09 | Sumitomo Rubber Industries, Ltd. | Pneumatic tire reinforced with fabric |
| JPH0433903B2 (en) * | 1984-12-12 | 1992-06-04 | Toyo Boseki | |
| FR2620138B1 (en) * | 1987-03-31 | 1989-12-15 | Picardie Lainiere | TEXTILE SUPPORT OF THE KNITTED KNIT TYPE, METHOD FOR MANUFACTURING A TEXTILE SUPPORT, DRAPERY COMPLEX TEXTILE SUPPORT AND METHOD FOR SOLIDARIZATION TO A SECOND TEXTILE |
| EP0298459A3 (en) * | 1987-07-10 | 1989-05-31 | Aisin Seiki Kabushiki Kaisha | A belt |
| DE8912060U1 (en) * | 1989-10-10 | 1991-02-07 | Norddeutsche Schleifmittel-Industrie Christiansen & Co (Gmbh & Co), 2000 Hamburg, De | |
| CA2110279C (en) * | 1991-07-18 | 2003-10-07 | Harold D. Beck | Method of making toothed belt construction and such belt constructions |
| US5645504A (en) * | 1995-09-29 | 1997-07-08 | The Gates Corporation | Power transmission belt with teeth reinforced with a fabric material |
| DE102012105510A1 (en) | 2012-06-25 | 2014-02-20 | Contitech Antriebssysteme Gmbh | Articles, in particular drive belts, with a textile support |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3255614A (en) * | 1966-06-14 | Process for the production of reinforcing inlays for rubber articles | ||
| DE884543C (en) * | 1942-05-21 | 1953-07-27 | Halstenbach & Co | Warp knitted fabric with weft threads and unwoven inlaid chain threads |
| LU59791A1 (en) * | 1969-11-10 | 1971-08-11 | ||
| GB1568701A (en) * | 1973-05-08 | 1980-06-04 | Goodyear Tire & Rubber | Articles comprising or consisting of an internally reinforced elastomeric layer |
| GB1568702A (en) * | 1973-05-08 | 1980-06-04 | Goodyear Tire & Rubber | Articles comprising or consisting of an internally reinforced elastomeric layer |
| US3981206A (en) * | 1975-08-20 | 1976-09-21 | Dayco Corporation | Endless power transmission belt |
| US4011766A (en) * | 1976-02-19 | 1977-03-15 | Dayco Corporation | Endless power transmission belt |
-
1981
- 1981-07-06 GB GB08120766A patent/GB2102849A/en not_active Withdrawn
-
1982
- 1982-07-06 EP EP82303543A patent/EP0069589A3/en not_active Withdrawn
- 1982-07-06 JP JP11631482A patent/JPS5870754A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4828909A (en) * | 1987-12-17 | 1989-05-09 | Highland Industries, Inc. | Elastomer-coated fabric products and process for producing the same |
| EP0321276A2 (en) * | 1987-12-17 | 1989-06-21 | Highland Industries, Inc. | Elastomer-coated fabric products and process for producing the same |
| EP0321276A3 (en) * | 1987-12-17 | 1990-08-08 | Highland Industries, Inc. | Elastomer-coated fabric products and process for producing the same |
| GB2317622A (en) * | 1996-09-28 | 1998-04-01 | Wright M & Sons Ltd | Anti-ballistic fabric |
| GB2312002A (en) * | 1997-07-08 | 1997-10-15 | Welbeck Uk Limited | Knitted hose reinforcement fabric |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0069589A2 (en) | 1983-01-12 |
| EP0069589A3 (en) | 1983-08-24 |
| JPS5870754A (en) | 1983-04-27 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |