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Toothed power transmission belt with back fabric

a technology of power transmission belt and back fabric, which is applied in the direction of belts, mechanical equipment, other domestic objects, etc., can solve the problems of significant challenges in heat resistance, oil resistance, wear resistance, durability, load capacity, etc., and achieve good low-temperature durability

Pending Publication Date: 2021-07-22
THE GATES CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patent describes a toothed power transmission belt with a fabric on the smooth back side, made for use in oil-wet environments or at low temperatures. The fabric is made of a closed-mesh, knit material with polyurethane and nylon yarns, and can be heat-set and coated with an epoxy or RFL treatment. The resulting belt has improved durability and is particularly suitable for use in automotive engines. The invention also includes a method for making the belt and a method of installing it on a drive. The technical effects of the invention include improved durability and flexibility in extreme environments, as well as improved noise and vibration reduction.

Problems solved by technology

Use in an oil-wet environment, such as within the crankcase of an internal combustion engine, presents significant challenges in heat resistance, oil resistance, wear resistance, durability, and load capacity.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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  • Toothed power transmission belt with back fabric
  • Toothed power transmission belt with back fabric

Examples

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examples

[0034]A knit tube according to the invention was prepared using nylon 66 yarn and polyurethane elastic yarn fed into a circular, weft knitting machine. The knitting parameters are indicated in Table 1. After knitting, the tube was washed and heat set with the parameters as indicated in Table 1. The heat setting was done on a two-roll mill with steam heat. Thus, the fabric was also pressed during heat setting.

TABLE 1Knit Process ParametersKnit TubeKnit styleTubular Weft knitting 1 × 1 Feeding speed13 RPMYarn feed ratio22 (Nylon66):8.5 (PU)Yarn content (weight %)90% Nylon66 + 10% PU Nylon tension5-7 gPost Processing ParametersWater temperature60° C. Wash time20 min.Drying temperature110-120° C.Drying speed7 m / min.Heat Set temperature120-130° C. Heat Set speed12-13 m / min.

[0035]The knit tube was then cut to length and treated with various adhesive treatments as indicated in Table 2. As a control variable, conventional woven nylon 66 stretch fabric was used. The EP-1 treatment in Table 2...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Abstract

A toothed power transmission belt with a smooth back side surface has a back jacket on the back side surface; wherein the back jacket comprises a closed-mesh, knit fabric tube. The fabric tube may be knitted on a circular weft knitting machine and may be heat set after knitting. The fabric tube may be treated with an epoxy, RFL or other treatment to provide for oil resistance, adhesion, frictional properties, etc.

Description

BACKGROUND OF THE INVENTION[0001]This invention relates generally to toothed power transmission belts with fabric on the smooth, back side; more particularly with a closed-mesh, tubular, back fabric, circular-knitted with polyurethane and nylon yarns, heat set, and having an epoxy-based treatment, and particularly suitable for use in an oil-wet environment.[0002]Toothed power transmission belts are used to transmit mechanical power and motion between two or more shafts. The teeth mesh with corresponding grooves on sprockets or pulleys, resulting in synchronized motion and torque transfer. The typical timing belt construction includes a high-modulus tensile cord embedded in a rubber belt body, with regular, transverse teeth on one side, the toothed side, of the belt and a smooth surface on the back side of the belt. Representative of the art is U.S. Pat. No. 6,358,171 B 1 to Whitfield. There is typically a woven fabric covering the toothed surface of the belt. The tooth covering fabr...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): F16G1/28F16G1/10B29D29/08F16G5/08F16G5/20
CPCF16G1/28F16G1/10B29K2063/00F16G5/08F16G5/20B29D29/08B29K2007/00B29K2675/00B29K2677/00B29K2713/00B29K2995/0058
Inventor GAO, MINBLUNSDEN, NIGEL PETERCHEN, GUOGONGWU, SHAWN XIANG
Owner THE GATES CORP
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