221results about "V-belts" patented technology

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.

A power transmission belt having a conductive rubber mixture, which has a resistivity of less than 6.0 MΩ, wherein the conductive composition includes a base rubber, 25 to 250 phr of non-conductive carbon black as a filler and up to 5 phr of graphene as a conductive filler. The incorporation of a combination of a non-conductive carbon black filler and graphene into the rubber mixture allows for the replacement of conductive carbon black, which is conventionally used to procure conductive properties to rubber, but which has the disadvantage that it is comparatively expensive, especially in the quantities needed to confer conductive properties to the rubber mixture.

The present invention relates to a method of producing a cord for a power transmission belt, the method including: a first treatment step of treating an untreated yarn of a cord for a power transmission belt with a first treatment agent including a resin component (A) to obtain a first treated yarn; and a second treatment step of treating the first treated yarn with a second treatment agent including a condensate (B1) of resorcin and formaldehyde, an unmodified latex (B2), and an acid-modified diene-based polymer (B3) to obtain a second treated yarn.

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 transmission V-belt that can suppress exothermic heat even when being used for a small-sized belt type stepless speed change device, and can suppress peeling of a core wire and generation of cracks in a compressed rubber layer.SOLUTION: A core wire of a transmission V-belt is formed by Lang' lay cords obtained by doubling and ply-twisting a plurality of aramid fiber-containing first twist yarns, and a total fineness of the core wire is adjusted to 1,000-3,500 dtex. Tensile strength per wire of the core wire may be 500-1,000 N. A pitch of the core wire may be larger by 0.05-0.25 mm than an average diameter of the core wire, and an average diameter of the core wire may be 0.4-1 mm. An elongation rigidity per mm pitch width of the belt may be 6,500-20,000 N, and a flexural rigidity per mm pitch width of the belt may be 40-260 N (mm)2. A thickness of the transmission V-belt may be 5-12 mm, and a pitch width may be 10-25 mm. The transmission V-belt may be a low edge V-belt having a cog at least on the inner peripheral surface side, and the transmission V-belt may be a gear change belt to be used for a small-sized belt type stepless speed change device.SELECTED DRAWING: None

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).

A belt made of a flexible material with electronics arranged therein, wherein at least one state variable of the belt can be measured by means of the electronics and wirelessly transmitted to a remotely arranged receiving unit, and wherein the electronics are coated with a thermally conductive elastic material that contains particulate and fibrous additives in a proportion of a maximum of 15 wt.% to impart thermal conductivity, and the particulate and fibrous additives are incorporated into the coating material in a ratio of 4:1 to 15:1. The inclusion of particulate and fibrous additives imparts not only improved thermal conductivity to the coating but also improved signal transmission properties.The present invention further relates to arrangements comprising such a belt, belt transport rollers, and an antenna arranged in spatial proximity to the electronics so that information can be transmitted from the electronics to the antenna during operation of the belt, as well as the use of a sensor equipped with radio technology in a belt for determining state variables of the belt, such as in particular the belt temperature.

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.

A power transmission system comprising a transmission belt (10) comprising a body (13) comprising a first elastomeric material, a plurality of cords (14) and a plurality of V-shaped ribs (19) arranged side by side to one other and alternating with V-shaped grooves (20), and extending along the transversal axis A of the belt. The belt comprises a first toothing (26) and a second toothing (27) formed by a plurality of teeth (28, 29) and extending obliquely to the transversal axis A of the belt forming therewith respective helix (alpha, beta) angles different from 0°.

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 utility model discloses a low-noise triangular transmission belt, and belongs to the field of triangular transmission belts. Comprising an annular belt body, the belt body is composed of a first rubber layer, a core rope layer and a second rubber layer. The core rope layer is wrapped by the first rubber layer and the second rubber layer; a plurality of tooth parts which extend in the length direction of the belt and are arranged in parallel are formed on the lower surface of the second rubber layer, and grooves which are concave inwards are formed in the tooth parts. The low-noise triangular transmission belt has the beneficial effects that the power transmission efficiency is improved, and the noise of an engine is reduced.

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.

To provide a frictional transmission belt capable of reducing noise generating when being wetted.SOLUTION: A frictional transmission belt includes a belt main body transmitting power to a pulley by frictional force generated by contact with the pulley. In a relation between a slip speed as a difference between a speed of the belt main body and a speed of the pulley, and a friction coefficient, a reduction rate Dm of the friction coefficient indicated by a following formula (1), in which a maximum friction coefficient is μx and a reference friction coefficient is μr, is 20% or less, when the slip speed indicating the maximum friction coefficient is a first slip speed, the friction coefficient in increasing the slip speed from the first slip speed to a second slip speed is a reference friction coefficient, and a difference between the second slip speed and the first slip speed is 500 mm / s. Dm=(μx-μr) / μx×100 ... (1)SELECTED DRAWING: Figure 2

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.