161results about "V-belts" patented technology

The invention relates to a transmission belt (10) comprising a body provided with at least one elastomer-based tooth (B), said at least one tooth comprising: - an ethylene-propylene-diene monomer in a proportion of between 85 and 100 parts, per 100 parts of elastomer; - natural rubber in a proportion at most equal to 15 parts; - and regenerated carbon black in a proportion of between 20 and 70 parts.

To provide a wrapped coupling V-belt capable of reducing lateral vibration (or twisting) of a coupling V-belt and improving durability with respect to breakage or ring cut of the belt by reducing a difference of extensions of V-belts traveling in parallel.SOLUTION: A coupling V-belt 1 including a plurality of wrapped V-belt parts V disposed in parallel in a belt width direction and a tie band T for connecting the wrapped V-belt part is formed from a V-belt main body 5 and a cover cloth 6 which covers at least a side face of the V-belt main body 5, and the tie band T includes a core wire 3a. The tie band T may also include an adhesive rubber layer 3 including the core wire 3a. The tie band T may also include a first rubber layer 2, which is formed on an outer peripheral side of the adhesive rubber layer 3, and a second rubber layer 4 which is formed between the adhesive rubber layer 3 and the wrapped V-belt part V. The wrapped V-belt part V may also include a third rubber layer 5a, which is formed on an outer peripheral side of the belt, and a fourth rubber layer 5a having a lower rubber hardness.SELECTED DRAWING: Figure 1

The invention discloses a flex-resistant rubber composition for a triangular belt compression layer and a preparation method thereof. The flex-resistant rubber composition is prepared from the following components in parts by weight: 70 to 80 parts of natural rubber, 20 to 25 parts of butadiene styrene rubber, 10 to 15 parts of liquid polyisoprene rubber, 20 to 25 parts of layered inorganic powder, 1 to 2 parts of maleic anhydride polybutadiene, 5 to 10 parts of blue cotton short fiber, 50 to 60 parts of carbon black, 5 to 10 parts of white carbon black, 3 to 5 parts of coupling agent, 2 to 4 parts of tackifier, 2 to 3 parts of plasticizer, 6 to 8 parts of activator, 1.5 to 2.0 parts of anti-aging agent, 0.5 to 1 part of zinc methacrylate, 1 to 2 parts of accelerant and 2.8 to 3.0 parts of sulfur. The liquid polyisoprene rubber is utilized to mechanically shear and modify the layered inorganic powder, and when the liquid polyisoprene rubber is used for the rubber composition, the layered slippage property is achieved, so that stress concentration is avoided. The blue cotton short fiber is cooperated to increase the strength, limit the movement of a rubber molecular chain, prevent crack propagation and improve the flex resistance.

The present invention relates to a raw edge cogged V-belt, including: a cog at least on an inner circumferential surface side; and a compression rubber layer disposed on the inner circumferential surface side, in which the compression rubber layer includes a compression rubber layer main body and an inner surface layer covering an inner circumferential surface of the compression rubber layer main body, and a friction coefficient of a surface of the inner surface layer is higher than a friction coefficient of a surface of the compression rubber layer main body that is not covered with the inner surface layer.

To improve the wear resistance and productivity of power transmission belts. [Solution] A rubber composition containing an ethylene-long-chain α-olefin-non-conjugated polyene copolymer, in which the long-chain α-olefin units have 4 or more carbon atoms, in a proportion of 25% by mass or more in the rubber component is compounded with the fabric of the transmission belt. The rubber composition may further contain silica, hard carbon black, aliphatic oil, tackifier, etc. At least a portion of the belt surface may be covered with a composite of the crosslinked rubber composition and the fabric to produce the transmission belt. This transmission belt may be a wrapped V-belt.

This invention relates to a flat link chain (1) for a tapered belt drive with infinitely adjustable transmission ratio. According to the invention, each link group (30) of the flat link chain has exactly thirty-three chain plates (2) of a predetermined chain plate width (b1) with a width (B), wherein the intermediate link (3-2) places the chain plate (2) at chain plate positions one (KLP1), five (KLP5), eight (KLP8), eleven (KLP11), fourteen (KLP14), seventeen (KLP17), twenty (KLP20), twenty-three (KLP23), twenty-six (KLP26), twenty-nine (KLP29), and thirty-three (KLP33), wherein the first link (3-1) adjacent to the intermediate link (3-2) is at chain plate positions three (KLP3), four (KLP4), nine (KLP9), twelve (KLP3), and thirty-three (KLP33). Chain plates (2) are placed at KLP12, 15, 18, 21, 24, 27, 28 and 32, and the second chain link (3-3) adjacent to the middle chain link (3-2) is placed at chain plate positions (KLP) 2 (KLP2), 6 (KLP6), 7 (KLP7), 10 (KLP10), 13 (KLP13), 16 (KLP16), 19 (KLP19), 22 (KLP22), 25 (KLP25), 30 (KLP30) and 31 (KLP31).

The present invention relates to a belt mechanism provided in a bicycle continuously variable transmission including a drive pulley and a driven pulley each configured from a pair of sheaves that can be moved toward and away from one another in the direction of an axis of rotation, and a V-belt wound between the drive pulley and the driven pulley, wherein an LT coefficient of the V-belt with respect to the drive pulley lies in a range of 8 to 12 in a usage condition in which torque is maximized with the continuously variable transmission shifted to a lowest speed side, and the V-belt has a belt transverse stiffness in a range of 1500 to 2500 N / mm in a ride-out change measurement test.

To provide a power transmission joined V-belt having high durability in which longitudinal splitting and back surface cracking are unlikely to occur.SOLUTION: A power transmission joined V-belt 10 includes: an adhesive rubber layer 2 in which a cord 1 is embedded; a tension rubber layer 3 provided on an upper side of the adhesive rubber layer 2; a back fabric layer 6 provided on an upper surface of the tension rubber layer 3; a compression rubber layer 5 provided on a lower side of the adhesive rubber layer 2; and groove portions 7 recessed so as to extend in a belt longitudinal direction in a bottom surface of the compression rubber layer 5. By the groove portions 7, multiple uncovered, V-shaped cross-section V-belt portions 8 are arranged side by side in a belt width direction, the groove portions 7 reaching the tension rubber layer 3, and a ratio (T / H) of a thickness (T) of portions in the compression rubber layer 5 and the back fabric layer 6 where the groove portions 7 are not formed to an overall thickness (H) of the belt is set to 0.12 or more and 0.25 or less.SELECTED DRAWING: Figure 1

The present invention provides a transmission belt with excellent adhesion (bonding strength) between the silicone rubber layer on the conveying surface and the ethylene α-olefin elastomer layer laminated on the inner circumferential surface of the silicone rubber layer. [Solution] A transmission belt 1 for transporting articles, comprising a core wire 3 extending along the circumferential direction of the belt and an outer peripheral rubber layer 2 formed on the outer peripheral side of the belt relative to the core wire 3, wherein the outer peripheral surface of the outer peripheral rubber layer 2 is used for transporting articles. The outer periphery rubber layer 2 has a laminated structure including a first rubber layer 2a that forms the transport surface which is the outer periphery, and a second rubber layer 2b laminated on the inner periphery of the first rubber layer 2a. The first rubber layer 2a is formed from a crosslinked product of a first rubber composition containing silicone rubber, The second rubber layer 2b is formed of a crosslinked product of the second rubber composition containing ethylene-α-olefin elastomer, and The first rubber composition and / or the second rubber composition are blended with an unsaturated carboxylic acid metal salt.

Disclosed is an invention pertaining to a Classical BX Section V-belt composed of an aramid reinforcement cord and an EPDM compound, allowing the belt to perform efficiently in conditions of high-temperatures ranging between 90°C and 120°C. The aramid reinforcement cord in the belt increases tensile strength and minimizes elongation, while the EPDM compound increases heat resistance and durability. The V-belt construction also incorporates an EPDM coated fabric with an 80:20 polyester-polyamide composition ratio, ensuring increased flexibility and reduced stiffness. Other embodiments describe a method of manufacturing this Classical BX Section V-belt and the incorporation of the V-belt into a power transmission system for efficient operation under high- temperature conditions.

To provide a high-performance transmission belt.SOLUTION: A transmission belt B has at least a portion 111 of a belt body 11 formed of a crosslinked rubber composition. The crosslinked rubber composition is composed of a crosslinked product of an uncrosslinked rubber composition containing a rubber component, nanofibers, carbon black, zinc dimethacrylate, and an amylphenol disulfide polymer. In the crosslinked rubber composition, the nanofibers are oriented in the belt width direction. In the uncrosslinked rubber composition, the content of the carbon black is between 25 parts by mass and 70 parts by mass, and the sum of the contents of the carbon black and the zinc dimethacrylate is between 35 parts by mass and 75 parts by mass, relative to 100 parts by mass of the rubber component.SELECTED DRAWING: Figure 1A

The application discloses a special sand-blasting triangular belt with wear-resistant top glue, which comprises a strong layer, a stretching layer, a compression layer, a cloth layer and wear-resistant top glue; the strong layer is polyester steel wire; the stretching layer and the compression layer are adhered to the upper and lower sides of the strong layer; the cloth layer is wrapped outside the strong layer, the stretching layer and the compression layer to form a basic triangular belt; and the basic triangular belt is provided with a layer of wear-resistant top glue on the top. The triangular belt is provided with a layer of wear-resistant top glue on the top, which improves the wear resistance of the top surface; the triangular belts are arranged side by side to form a sand-blasting production line conveying line, which can complete the conveying task, effectively avoid the accumulation of the sprayed material, improve the sand-blasting effect and reduce the energy consumption of the conveying line; and the wear-resistant top glue can withstand the impact of the sprayed material and is not easy to wear, so that the service life of the triangular belt in the sand-blasting production line is long.

Transmission belt (10) comprising a body having at least one elastomer-based tooth (B), said at least one tooth comprising: - ethylene-propylene-diene monomer in a proportion of between 85 and 100 parts per 100 parts of elastomer; - natural rubber in a proportion not exceeding 10 parts; - reclaimed carbon black in a proportion of between 20 and 70 parts. Figure for the abbreviation: Figure 1

The present invention provides a power transmission belt with excellent adhesion (bonding strength) between the silicone rubber layer on the conveying surface and the hydrogenated nitrile rubber layer laminated on the inner circumferential surface of the silicone rubber layer. [Solution] A transmission belt 1 for transporting articles, comprising a core wire 3 extending along the circumferential direction of the belt and an outer peripheral rubber layer 2 formed on the outer peripheral side of the belt relative to the core wire 3, wherein the outer peripheral surface of the outer peripheral rubber layer 2 is used for transporting articles. The outer periphery rubber layer 2 has a laminated structure including a first rubber layer 2a that forms the transport surface which is the outer periphery, and a second rubber layer 2b laminated on the inner periphery of the first rubber layer 2a. The first rubber layer 2a is formed from a crosslinked product of a first rubber composition containing silicone rubber, The second rubber layer 2b is formed of a crosslinked product of a second rubber composition containing hydrogenated nitrile rubber, and The first rubber composition and / or the second rubber composition are blended with an unsaturated carboxylic acid metal salt.

The present invention provides a transmission belt with excellent adhesion (bonding strength) between the silicone rubber layer on the conveying surface and the ethylene α-olefin elastomer layer laminated on the inner circumferential surface of the silicone rubber layer. [Solution] A transmission belt 1 for transporting articles, comprising a core wire 3 extending along the circumferential direction of the belt and an outer peripheral rubber layer 2 formed on the outer peripheral side of the belt relative to the core wire 3, wherein the outer peripheral surface of the outer peripheral rubber layer 2 is used for transporting articles. The outer periphery rubber layer 2 has a laminated structure including a first rubber layer 2a that forms the transport surface which is the outer periphery, an intermediate layer 2b laminated on the inner periphery of the first rubber layer 2a, and a second rubber layer 2c laminated on the inner periphery of the intermediate layer 2b. The first rubber layer 2a is formed from a crosslinked product of a first rubber composition containing silicone rubber, The intermediate layer 2b contains a crosslinked binder component containing an unsaturated carboxylic acid metal salt. The second rubber layer 2c is formed from a crosslinked product of a second rubber composition containing ethylene-α-olefin elastomer.

A rubber composition for a power-transmission belt includes: a polymer component including an ethylene-α-olefin elastomer; carbon black; and clay, in which the ethylene-α-olefin elastomer has a Mooney viscosity at 125° C. of 25 ML (1+4) 125° C. or less, the clay has a pH of 5.5 or higher, a total amount of the carbon black and the clay is 80 parts by mass to 180 parts by mass with respect to 100 parts by mass of the polymer component, and a mass ratio of the carbon black to the clay is clay / carbon black=0.2 / 1 to 1.2 / 1.

A transmission belt (100) for a roller conveyor having rollers, made of steel or plastic and having concave grooves, the belt comprising: - an elastomeric body (102) comprising a back portion (104) and a belly portion (106) formed by a single tooth, the outer surface of the elastomeric body having a convex shape configured to engage with the concave grooves of the rollers; - a set of tension cords (110) embedded in the body (102) between the back portion (104) and the belly portion (106) of the body; - a coating (112) disposed on the outer surface of the tooth, having the shape of the outer surface of the tooth and defining a coefficient of friction with the concave grooves of the rollers that is non-zero and less than or equal to 0.8.

This invention addresses the problem of providing a new transmission belt that does not use MOCA. The present invention provides a transmission belt characterized by comprising a heat-cured product of a polyurethane composition containing a urethane prepolymer comprising a polyether polyol and diphenylmethane diisocyanate, and either one or both of 1,4-bis-hydroxyethoxybenzene and 1,3-bis-hydroxyethoxybenzene as a curing agent.

The utility model discloses an anti-aging wrapping cloth V belt which comprises three groups of inner cores, a first wrapping cloth layer is wound among the three groups of inner cores, a first gum dipping line layer is spirally wound on the outer side of the first wrapping cloth layer, a heat insulation layer is wound on the outer side of the first gum dipping line layer, and a second gum dipping line layer is wound on the outer side of the heat insulation layer. And a second wrapping cloth layer is arranged on the outer side of the second impregnated wire layer. According to the wrapping cloth V belt with the anti-aging performance, the internal structure of the V belt is prevented from being damaged by heat as much as possible, so that the anti-aging performance is improved, and the service life is prolonged.

A transmission belt for a roller conveyor having rollers having concave grooves and made of steel or plastic is disclosed. The belt comprises an elastomer-based body comprising a dorsal portion and a ventral portion formed by a single toothing, an outer surface of which has a convex shape configured to engage with a concave groove of a roller; a set of tension cords embedded in the body between the dorsal portion and the ventral portion of the body; and a coating arranged on the outer surface of the toothing and defining, with the convex shape of the outer surface of the toothing, a coefficient of friction with the concave groove of a roller that is non-zero and less than or equal to 0.8.

The toothed belt 1, as a power transmission belt of the present invention, has an endless strip-shaped back portion 11 and belt teeth 12 provided on the inner circumference side of the back portion 11. The back portion 11 comprises a base portion 21 made of rubber material and a core wire 3 embedded in the base portion 21. The core wire 3 is a twisted yarn made by twisting together filaments 31, a part of the base portion 21 is contained within the core wire 3, and the bending rigidity of the core wire 3 taken from the toothed belt 1 is 0.15 g·cm 2 / dtex or more 0.30g cm 2 It is below / dtex.

In some embodiments, this disclosure provides compositions comprising 5 phr–30 phr of a PEDM terpolymer having 1–10 wt% diene, 13–40 wt% ethylene, and 15–85 wt% propylene, based on the weight of the PEDM terpolymer. The compositions further comprise 70 phr–95 phr of a terpolymer having an ethylene content, C3–C4, and C4 content different from the first polymer. 12 Ethylene-based copolymers of α-olefins and, unnecessarily, one or more dienes.

A friction transmission belt includes a compression layer forming a pulley contact portion, the compression layer includes an inner layer formed from a rubber composition and an outer layer provided on a pulley contact side of the inner layer and formed from a fiber member, and a ratio (M10 modulus / M50 modulus) of an modulus at 10% elongation in a belt longitudinal direction (M10 modulus) to an modulus at 50% elongation in the belt longitudinal direction (M50 modulus), of the rubber composition, is not less than 1.5.

The present invention relates to a transmission V-belt, which is a transmission V-belt comprising a cured form of a first rubber composition, wherein the first rubber composition comprises a polymer component (A) containing an ethylene-α-olefin elastomer, a crosslinking agent (B) containing a sulfur-based crosslinking agent, and short fibers (C), wherein the short fibers (C) are oriented along the belt width direction, the rubber hardness (JIS-A) of the cured form is 91 degrees or more, and the elongation at break of the cured form in the belt length direction is 100% or more.

The invention relates to a drive belt, in particular a V-belt or a multi-ribbed belt, with a base body made of a polymeric material with elastic properties, comprising a cover layer as the belt backing and a substructure with a power transmission zone, wherein the polymeric material with elastic properties is based on a cross-linked rubber compound, characterized in that the cross-linked rubber compound comprises up to 100 phr of a sustainable carbon-containing material (SCM) with a particle size of D97 < 15 µm as measured according to ISO 13320:2020. The drive belt according to the invention has improved sustainability, expressed by a reduced CO2 footprint, and at the same time a very good service life.