Abstract: A belt element for a vehicular transmission belt is designed to be supported by the bands such that the head portion is located on an outer side of the bands. The base, head and connecting portions define two slots for engagement with the respective annular bands, and the base portion has an edge extending in its width direction. The edge includes a first edge located inwardly of widthwise ends of the head portion and functioning as a fulcrum of the belt element upon rocking of the belt element, and second edges located outwardly of the widthwise ends. The base portion has a smaller thickness on an inner side of the edge than on an outer side of the edge, and the second edges are located nearer to the head portion than the first edge.

Abstract: A method of checking belt tension of a belt extending between pulleys includes providing a reference indicator defining a reference position relative to the upper surface of the belt in an undeflected state. A force/probe assembly is provided and is operable to measure a force applied to the distal end. The distal end is positioned on the upper surface of the belt and a force is applied generally perpendicular thereto. The belt may be deflected a predetermined distance, as determined by a change in position of the assembly relative to the reference indicator, and the force is measured, or a force is applied until the force is equal to a predetermined force, and the deflection of the belt is determined by a change in position of the force/probe assembly. The belt tension is determined based on the force and distance during the deflecting step.

Abstract: An element for a transmission belt that is wound around a primary pulley and a secondary pulley of a continuously variable transmission includes: a trunk portion having a saddle surface that is in contact with a ring of the transmission belt; and a pair of pillar portions extending from the trunk portion so as to be positioned on both sides of the saddle surface in a width direction. The saddle surface is a convex surface that is formed by an elliptic arc and satisfies b/a?0.015 when a long diameter of the elliptic arc is regarded as “a” and a short diameter of the elliptic arc is regarded as “b”. In this way, it is possible to optimize the stress distribution of the ring that is in contact with the saddle surface and improve the durability of the ring and the transmission belt.

Abstract: A transmission belt includes: a plurality of elements, each having a plate shape, arranged sequentially in a ring manner; and a single-line ring having a belt shape and binding the elements together in a ring. Further, each of the elements includes pillar portions so that the single-line ring is inserted and a locking edge, provided on one surface in a plate thickness direction of the element, indicating a boundary region from which a plate thickness of the element changes, the pillar portions have respective ends, the ends having portions in a curved shape each having a predetermined curvature radius along a plane parallel to the single-line ring, and the portions in the curved shape include a first portion being formed on a front side at one end of the inner space, and a second portion being formed on a rear side at another end of the inner space.

Abstract: A transmission belt is formed by a plurality of elements each having: a body portion including a saddle surface that contacts an inner peripheral surface of an endless ring and a pair of pillar portions that are extended outward in the radial direction of the transmission belt from both lateral sides of the saddle surface; a first surface that is formed on one side of the body portion in the circumferential direction of the transmission belt and a second surface that is formed on the other side of the body portion in the circumferential direction of the transmission belt; and rocking edge portions that are formed at both lateral ends of the first surface so as to be separated from each other and that act as a fulcrum when adjacent ones of the elements contact each other and rotate relative to each other.

Abstract: A metal element for continuously variable transmission and method of producing the same are provided. A rear surface of a metal element includes first contact parts formed at top positions on the outer side in the radial direction of a saddle surface on left and right sides of an ear part, a second contact part formed in a neck part, and third contact parts formed at a top position of the saddle surface on left and right sides of the body part. In a chord on the driving force transmission side of the metal belt, the first to third contact parts are able to be brought into contact with a front surface of another metal element adjacent to the rear side. A plate thickness of the metal element at the second contact part is smaller than the first contact part and is larger than the third contact part.

Abstract: A transverse member (1) for a drive belt for a continuously variable transmission with a base part (10) and two pillar parts (11). On either side thereof, the transverse member is provided with a pulley contact surface (12) for contacting pulleys of the transmission. The pulley contact surfaces (12) are each provided in two sections (13, 14) with a surface part (15) of the transverse member (1) provided there between that does not arrive in contact with the transmission pulleys, whereof a first section (13) is provided at least partly in the base part (10) and whereof a second section (14) is wholly provided in a respective pillar part (11).

Abstract: The CVT includes a first pulley and a second pulley. Each of the first and second pulleys includes a first sheave, a second sheave, and a pulley axle operatively coupled between the first sheave and the second sheave. The first sheave can move relative to the second sheave along the pulley axle. Each of the first and second sheaves includes a sheave body and a plurality of sheave teeth protruding from the sheave body. The CVT further includes an endless rotatable device operatively coupled between the first and second pulleys. The endless rotatable device includes a plurality of pins interconnecting at least two of the links. The endless rotatable device further includes a plurality of device teeth each coupled to the pins.

Abstract: In a metal belt for a continuously variable transmission having a saddle face of a metal element and a rocking edge positioned at substantially the same position in the radial direction, a rocking edge is provided at a radially outer end of a front face of a body part, the rocking edge being a fulcrum for pitching of the metal element of the metal belt which is wound around a drive pulley and a driven pulley and transmits a driving force between the two pulleys, and a recess is provided extending from a front face of a neck part to a front face of the body part. Thus, it is possible to minimize a space created between the front and rear metal elements and reduce the bending stress applied to the metal elements, thereby minimizing degradation of the power transmission efficiency.

Abstract: A belt clamping system including an open-ended, flat belt with an end portion having a number of teeth projecting therefrom and a clamping plate with matching tooth profile for use in connecting the belt end to another structure. The flat belt may be reinforced with longitudinally extending cords. The toothed profile may be a standard timing belt profile and may be unreinforced. A length of timing belt profile material may be welded to the flat surface of the open-ended flat belt at or near an end. The length of timing belt profile may include at least 7 tooth pitches. The end portion may be clamped between a flat surface of a flat plate and a grooved surface of a grooved plate having grooves complementary to the timing belt teeth.

Abstract: A chain, wound to span between two pulleys each having facing conical surfaces able to change a distance therebetween and sandwiched by the facing conical surfaces, includes: link units each configured such that plate-shaped links, each having openings, are oriented in a chain circumferential direction and arranged in a chain width direction; and pins each extending through the openings of the links of the link units adjacent in the chain circumferential direction and each contacting the conical surfaces of sheaves at both ends thereof. A curvature radius of a shape curve representing a shape of each end face of each pin in a plane perpendicular to the chain circumferential direction is larger at an inner side in a pulley radial direction than at an initial contact point that is a contact point at the time when a load on each pin is 0.

Abstract: A continuously variable transmission belt includes rings each superimposing annular component pieces on each other's inner and outer peripheries, and plural elements attached to the rings side by side in a circumferential direction. Each element includes a neck portion. The rings are disposed on opposite sides of the neck portion. The elements contact a driving pulley and a driven pulley. A lubrication oil discharge mechanism discharges out a lubrication oil in at least one of a gap between the component pieces, and a gap between each ring and the elements. A function of discharging the lubrication oil present in a region remote from the neck portion is higher than a function of discharging the lubrication oil present in a region near the neck portion. Thereby, the rings to which the elements are attached or the component pieces of the rings restrain decline in the centering characteristic in the width direction.

Abstract: A V-belt for high load transmission reduces the temporal change in belt tension according to a change in a thrust-tension conversion ratio from an initial running stage. For this purpose, the side surfaces of each tension band and blocks in a belt width direction form sliding surface abutting on the groove surface of a pulley. An area S1 of the sliding surface of the tension band and an area S2 of the sliding surface of each of the blocks satisfy a relationship of S1/S2?0.2 (i.e., the area S1 of the sliding surface of the tension band is 20% or smaller of the area S2 of the sliding surface of each of the blocks).

Abstract: On each block side face of the blocks of a V-belt for transmitting high load, a ratio of a dimension extending in a belt thickness direction from a buried cord center line of a corresponding tension band to an upper end of an upper pulley-contact face to a dimension extending in the belt thickness direction from the buried cord center line to a lower end of the upper pulley-contact face is larger than or equal to 4.0, and a dimension extending in the belt thickness direction from the buried cord center line to a middle of the upper pulley-contact face is smaller than or equal to 2.3 mm.

Abstract: On each block side face of the blocks of a V-belt for transmitting high load, a ratio of a dimension extending in a belt thickness direction from a buried cord center line of a corresponding tension band to an upper end of an upper pulley-contact face to a dimension extending in the belt thickness direction from the buried cord center line to a lower end of the upper pulley-contact face is larger than or equal to 4.0, and a dimension extending in the belt thickness direction from the buried cord center line to a middle of the upper pulley-contact face is smaller than or equal to 2.3 mm.

Abstract: A transmission belt includes: an endless annular hoop formed by overlapping a plurality of thin strip-shaped rings; and a multiplicity of elements supported by the hoop in an annularly arranged state along the hoop, the elements including a saddle surface pressed against an inner circumferential surface of a first ring located at the innermost circumference of the hoop, the transmission belt wound between a plurality of pulleys to transmit power and having a shape in the width direction of the first ring elastically deformed in accordance with the saddle surface in a pressed state while the inner circumferential surface of the first ring is pressed against the saddle surface, wherein the saddle surface is curved as a whole such that a center portion in the width direction bulges out, and wherein a degree of bulging-out of the center portion is smaller as compared to a degree of bulging-out of peripheral portions on the both sides, and the first ring is formed into a curved shape with a center portion in the w

Abstract: Each steel element for a V-belt of a continuously variable transmission has a flank (4a) that comprises a plurality of equally spaced raised portions (41) each being placed between two fine grooves (42). A flat flatness ratio (FR) given by the equation (1) is set to the highest one of values that are capable of practically machining the flank (4a) of the steel element (4) and capable of causing the flank (4a) to exhibit a given and satisfied lubrication oil discharging effect, and a groove pitch (GP) that is a distance between the two fine grooves (42) is set to a value that is capable of practically machining the flank of the steel element and capable of causing the flank to exhibit a given and satisfied lubrication oil discharging effect. The groove pitch thus set is a value that is permitted by the higher value of the flatness ratio thus set. FR (%)=WRP/(WRP+WG)×100??(1) wherein: FR: Flatness ratio WRP: Width of the raised portion (41) WG: Width of the groove (42).

Abstract: Although a radial outside portion of a metal ring contact surface of a neck section of a metal element which is contactably opposed to a side edge of a metal ring of a metal ring assembly has high frequencies of contacting with a side edge of the metal ring, it is possible to suppress abrasion of the side edge of the metal ring and to improve durability of the metal ring by setting a surface hardness of the radial outside portion lower than a surface hardness of the metal ring. In addition, by setting a surface hardness of the metal ring contact surface at its portion of the radial outside lower than the surface hardness of the metal ring contact surface at other portions thereof where the frequencies of contacting with the side edge of the metal ring becomes low, in comparison with a case of setting the surface hardness of the whole metal ring contact surface low, it is possible to increase strength of the metal element and to improve the durability of the metal element.

Abstract: The invention relates to a drive belt (3) including an endless carrier (31) and a plurality of transverse members (30) that are mounted on and arranged along the circumference of the carrier (31) in an essentially contiguous row. This type of drive belt (3) is well-known, in particular from its application in the friction-type belt-and-pulleys transmission. According to the invention, the efficiency of such a transmission is improved when not all transverse members (30) of the drive belt (3) take part in the frictional contact with the transmission pulleys (1, 2). This technical effect is realized, in accordance with the invention, by providing the drive belt (3) with two types of transverse members (30), whereof the second type is less wide than the first type.

Abstract: On each block side face of the blocks of a V-belt for transmitting high load, a ratio of a dimension extending in a belt thickness direction from a buried cord center line of a corresponding tension band to an upper end of an upper pulley-contact face to a dimension extending in the belt thickness direction from the buried cord center line to a lower end of the upper pulley-contact face is larger than or equal to 4.0, and a dimension extending in the belt thickness direction from the buried cord center line to a middle of the upper pulley-contact face is smaller than or equal to 2.3 mm.

Abstract: In a high load transmission V-belt, a plurality of blocks 20 are attached and fixed to a tension band 10 extending in a belt length direction in a state in which each of the blocks 20 are arranged so as to sandwich an engagement section 18 of the tension band 10 in an inter-beam clearance portion 26 formed between upper and lower beam portions 23, 24. An increased amount of change ?T in dimension T of the engagement section 18 of the tension band 10 in a belt thickness direction due to thermal expansion is equal to or less than an amount of change ?G in dimension G of the inter-beam clearance portion 26 of the block 20 in the belt thickness direction while running the belt (?T??G).

Abstract: A driving belt comprising plate elements juxtaposed in its thickness direction and a flat ring fastening the elements annularly. The elements includes at least one adjuster element configured to adjust an endplay as a total of clearances between the adjacent elements in the elements fastened annularly by the ring. The adjuster element comprises an insertion groove opening toward the endplay, and an inserting member inserted into the insertion groove and configured to protrude partially from the insertion groove thereby adjusting the endplay.

Abstract: To provide a push type driving belt, which is capable of preventing uneven wear of the ring and deterioration in durability of the ring, by preventing a transmission loss resulting from an internal slippage of the ring, and by positioning the ring properly with respect to the element. The push-type driving belt B comprises: an element 1, in which a recess 8 opening toward a diametrically outer circumferential side is formed in a width center thereof; and a ring 9, which is formed of single layer in its thickness direction using elastic material, and which is fitted into the recess 8 of the element 1 to fasten the elements 1 juxtaposed in a circular manner.

Abstract: A chain, wound to span between two pulleys each having facing conical surfaces able to change a distance therebetween and sandwiched by the facing conical surfaces, includes: link units each configured such that plate-shaped links, each having openings, are oriented in a chain circumferential direction and arranged in a chain width direction; and pins each extending through the openings of the links of the link units adjacent in the chain circumferential direction and each contacting the conical surfaces of sheaves at both ends thereof. A curvature radius of a shape curve representing a shape of each end face of each pin in a plane perpendicular to the chain circumferential direction is larger at an inner side in a pulley radial direction than at an initial contact point that is a contact point at the time when a load on each pin is 0.

Abstract: Adjacent chain elements transmit a tension by allowing two pins to contact each other. When a chain which has been in a linear state starts to bend, a contact point moves from one point to another. Such movement of the contact point generates a force couple. This force couple causes the rear end of the chain element to move in a lifted manner. An increasing rate of this amount of movement with respect to a relative angle to an adjacent chain element is set such that the increasing rate is small when the relative angle is small, and becomes larger when the relative angle becomes larger.

Abstract: A durable V-belt formed by fastening plate-like elements juxtaposed annularly using a ring. The element comprises a saddle face on which the ring is disposed, columns extending radially outwardly from lateral ends of a saddle face, and flank faces formed on lateral ends of the column to be contacted with a groove of a V-pulley to transmit power. An angle between outer circumferential portions of the flank faces is substantially identical to or smaller than an open angle of the groove of the V-pulley; and an angle between inner circumferential portions of the flank faces is larger than the angle between the outer circumferential portions.

Abstract: The present invention aims at improving the shock resistance of a block without lowering the power transmission property or the wear resistance of a belt while suppressing the separation of the contact portion off of the reinforcing member. A high-load drive V-belt B includes: at least one tension band 10 extending in an endless loop; and a plurality of blocks 20 engaged and secured to the tension band 10 at a predetermined pitch in a belt length direction of the tension band 10, wherein the plurality of blocks 20 are each formed by a reinforcing member 27 and a resin on both sides of the reinforcing member 27 in a belt width direction, and each include a contact portion 28 having a contact surface 30 to be in contact with a pulley, and a thickness w of the contact portion 28 in a direction perpendicular to the contact surface 30 is set to 1.0 mm or more and 1.8 mm or less.

Abstract: A method and device of assembling a driving belt, which can fit a ring into a recess of an element easily, and which can prevent the ring from being damaged when fitting the ring into the recess of the element. A driving belt, in which two rows of endless rings are accommodated parallel to each other in a recess of a plurality of elements interlinked annularly in a manner to situate the recess to open to an outer circumferential side, includes a guide face, which is formed on an end face of a protruding portion for holding the ring to prevent detachment of the ring from the recess. The guide face produces an inward component of a pushing force pushing one of the rings to one of the end faces, and the produced inward component of pushing force is applied to an outer lateral side of the pushed ring.

Abstract: A push belt (6) for a continuously variable transmission comprises transverse elements (10) of at least two different types, wherein the differences between the transverse elements (10) reside in a profile (24) which is present at pulley sheave contact surfaces (18) of the transverse elements (10). On the basis of the use of at least two different types of transverse elements (10) as mentioned, many advantages are achieved, including improved traction, reduction of wear, and noise reduction. The design of the profile (24) can be such that a pattern of voids (28) is created at a contact side of the push belt (6), which voids (28) are used for receiving oil. The pattern of voids (28) can be random, or not. In the latter case, it is possible to have a path (28) for discharging oil, extending along the contact side of the push belt (6).

Abstract: An endless metal belt including a ring formed by laminating endless metal plates; and multiple elements continuously attached to the ring. Each of the elements has a body, a head connected to the body by a pillar, and slots formed between the body and the head on left and right sides of the pillar, respectively, for receiving the ring. The elements satisfy the equations (h/t)<1 and (S/h)>40, where h is a width of the slots, t is a plate thickness of the elements, and S is an area of the head.

Abstract: An assembling device, an assembling method and a manufacturing method of a driving belt, which can facilitate fitting of rings into a recess of an element to improve productivity of the driving belt. The driving belt V, in which two rows of rings 8a and 8b are accommodated parallel to each other in a recess 7 of a plurality of elements 1 interlinked annularly in a manner to situate the recess 7 to open to an outer circumferential side, and in which the rings 8a and 8b are held in an inner circumferential side of the protruding portions 9 formed on an opening end of inner walls 6 of the recess 7 to prevent detachment of the rings 8a and 8b from the recess 7, comprises: a ring holding member 8c for restricting a relative movement between the rings 8a and 8b aligned parallel to each other entirely in its length direction without being overlapped.

Abstract: A continuous variable transmission belt, comprising an annular continuous band comprising a body reinforced by a longitudinal armature and a plurality of friction plugs connected by coupling of shape with at least one of either an outer spine of the continuous band or an inner surface opposite to the outer spine with respect to the armature, the friction plugs comprising respectively a friction member adapted to cooperate with a pulley of the transmission and a connection member cooperating with the friction member to rigidly connect the friction plug to the continuous band. Each of the connecting members is made of a material having a higher thermal conductivity than that of the friction members and presents an abutting surface against either of the outer spine or the inner surface.

Abstract: A driving belt and method of assembling the same, which can fit rings with elements easily even at a final phase of fitting work. In a driving belt, two rows of endless rings are accommodated and held parallel to each other in a recess of a plurality of elements interlinked annularly in a manner to situate the recess to open to an outer circumferential side and in a manner to pivot with respect to the adjoining elements, and the element includes plural types of elements having different configurations of the recess.

Abstract: A method for manufacturing a belt for a continuously variable transmission (CVT) in which multiple V blocks of a plurality of types having different thicknesses are attached to an endless body. The method includes forming a plurality of V block groups respectively having a different ratio of different types of V blocks; and forming a series of V blocks by attaching a plurality of V blocks to the endless belt to provide said plurality of V block groups. The V block groups have different ratios of the plurality of types of V blocks to provide a belt whose noise level is low and dispersed.

Abstract: A method for forming a convex tilting zone (23) at a main body-surface (11) of a transverse element for application in a push belt for a continuously variable transmission comprises the step of applying a die (30) that is placed against the main body surface (11) under pressure. However, the die (30) is pressed against the main body surface (11) just outside of an area where the tilting zone (23) needs to be formed. By applying the die (30), a recessed area (27) is arranged in the main body surface (11), wherein retraction of the material of the transverse element takes place along an upper edge (28) of this area (27). A retraction area that is obtained in this manner is suitable to function as tilting zone (23). An important advantage of the application of the described method is that the pressure that is exerted on the die (30) may be considerably lower than the pressure that is required during conventional processes for forming a tilting zone (23).

Abstract: A belt for a continuously variable transmission and elements used in the belt. The elements include a stopper portion formed integrally with a neck portion erected upwardly from a saddle face to hold a width end portion of the ring. The elements are juxtaposed annularly in a same orientation and fastened by rings disposed on a saddle face of the element thereby forming a belt for a continuously variable transmission. A recessed portion is formed by depressing the saddle face at a corner between a side face of the neck portion and the saddle face; and an inner face of the recessed portion includes a first inner face extending smoothly into the side face of the neck portion and having a relatively larger curvature radius, and a second inner face extending smoothly into the first inner face and having a relatively smaller curvature radius.

Abstract: A durable V-belt formed by fastening plate-like elements juxtaposed annularly using a ring. The element comprises a saddle face on which the ring is disposed, columns extending radially outwardly from lateral ends of a saddle face, and flank faces formed on lateral ends of the column to be contacted with a groove of a V-pulley to transmit power. An angle between outer circumferential portions of the flank faces is substantially identical to or smaller than an open angle of the groove of the V-pulley; and an angle between inner circumferential portions of the flank faces is larger than the angle between the outer circumferential portions.

Abstract: In a metal ring for a metal belt of a belt type continuously variable transmission, a relationship is established between a compressive residual stress of a metal ring of an innermost layer imparted by a nitriding treatment and a free state radius of the metal ring nondimensionalized by a minimum winding radius. In the relationship, the sum of a compressive residual stress acting on the inner peripheral face of the metal ring, a compressive stress due to flexure and a contact stress does not exceed the elastic deformation limit of the metal ring. The maximum compressive stress of the metal ring does not become excessive, and an abrasion resistance of the surfaces of the metal ring is guaranteed.

Abstract: A transverse element for a drive belt, includes a recess on either side for at least partially accommodating a ring assembly of the drive belt. The transverse element includes a base part lying radially inside the recesses, a connecting piece lying between the recesses, and a head part lying radially outside the recesses, the base part on either side of the connecting piece being provided with a radially outwardly directed saddle surface for contact with a ring assembly, and between a saddle surface and the connecting piece a notch being provided, in which notch a convexly curved part connects to the respective saddle surface, and in which notch a concavely curved part connects to a respective substantially axially directed side face of the connecting piece. The concavely curved part on either side of a radially most inward lying part thereof has a mutually differing degree of curvature.

Abstract: A power transmission chain (1) has links (11), pins (14), and interpieces (15). The links (14) each have a front and a back insertion parts (12, 13) through which the pins are inserted. The pins (14) and the interpieces (15) connect links (11) that are arranged side by side in the lateral direction of the chain such that the front insertion part (12) of one of the links (11) and the rear insertion part (13) of the other link (11) correspond to each other, and the connection is made such that that the links (11) are bendable in the longitudinal direction. The locus of a contact position of a pin (14) and an interpiece (15) is an involute of a circle. Two or more kinds of sets of a pin (14) and an interpiece (15) having different radii of base circles of involutes are formed, and these sets of a pin (14) and an interpiece (15) are randomly arranged.

Abstract: The end faces of a first pin contain bulging curved faces having an egg-like shape, when viewed along a chain width direction. Each bulging curved face includes a first end portion, a second end portion and a maximum width portion with respect to a chain advancing direction. With respect to perpendicular directions, the distance between the center of the maximum width portion and the first end portion is relatively large, whereas the distance between the center of the maximum width portion and the second end portion is relatively short. It is possible to enlarge the surface area of the bulging curved face.

Abstract: A chain is provided with a plurality of links, and connecting members for connecting those links such that the links are relatively bendable to each other. A first pin of the connecting member is clamped between pulleys thereby to transmit the power between itself and said pulleys. The chain includes a central area with respect to chain width directions, and side areas located on the sides of the central area. In the central area, links adjoining in the chain width directions are pushed to contact with each other, and rotate relative to each other while exerting frictional forces on each other as the chain is bent. In each of the side areas, the links adjoining in the chain width directions are arrayed through a predetermined clearance.

Abstract: To provide a push type driving belt, which is capable of preventing uneven wear of the ring and deterioration in durability of the ring, by preventing a transmission loss resulting from an internal slippage of the ring, and by positioning the ring properly with respect to the element. The push-type driving belt B comprises: an element 1, in which a recess 8 opening toward a diametrically outer circumferential side is formed in a width center thereof; and a ring 9, which is formed of single layer in its thickness direction using elastic material, and which is fitted into the recess 8 of the element 1 to fasten the elements 1 juxtaposed in a circular manner.

Abstract: A transmission belt is formed by annularly arranging elements including a plate-shaped first element and a plate-shaped second element, and annularly connecting the elements using a ring. The first element includes a first edge surface on which a burr is formed when the first element is formed by a press operation. The second element includes a second edge surface on which a burr is formed when the second element is formed by the press operation. The first and second edge surfaces face in directions opposite to each other in a direction in which the elements are arranged. The first edge surface includes a first rocking edge that contacts the element adjacent to the first element when the elements are arranged in an arc. The second edge surface includes a second rocking edge that contacts the element adjacent to the second element when the elements are arranged in the arc.

Abstract: The invention relates to an elastomeric product which contains a radical cross-linked rubber mixture, especially drive belts. For the production of elastomeric products, especially drive belts, having a long service life and producible in an environmentally friendly way, the rubber mixture contains (a) 0.1 to 50 phr of at least one carboxylic acid, which is at least ?,? unsaturated and ?,? unsaturated and preferably has at least one allylic hydrogen atom; and, (b) 0.1 to 50 phr of at least one salt-former as co-activator.

Abstract: A belt type non-stage transmission is constituted so that a V belt obtained by connecting a plurality of elements using a belt is wound around a pair of pulleys which have a groove with V-shaped cross section and which groove width can be changed. A diffusion layer where at least one of Zn and Sn diffuses on a surface layer of a metallic material of the pulleys and the elements is provided to at least one of contacting surfaces between the pulleys and the elements. The diffusion layer contains S and P. As a result, high frictional coefficient and wear resistance can be maintained for a long time, so that the device can cope with heightening of output.

Abstract: A stock rubber is provided with chopped aramid fibers and chopped polyester fibers blended in the rubber component, which is EPDM. The chopped polyester fibers are longer than the chopped aramid fibers. A transmission V-belt is obtained and molded from the stock rubber. When molding, the chopped aramid fibers and the chopped polyester fibers are oriented in a width direction of a belt body of the V-belt.

Abstract: The present invention is a transverse element for a drive belt for a continuously variable transmission. The drive belt includes two endless carriers, wherein transverse elements are continuously arranged along the entire length of the carriers. The transverse elements are on both sides provided with recesses for at least partially receiving the carriers. Furthermore, the transverse elements include supporting surfaces for supporting the carriers, as well as pulley sheave contact surfaces for the purpose of contact between the transverse elements and pulley sheaves of the continuously variable transmission. A convex transition region which has two parts having different curvature radii is situated between a supporting surface and a pulley sheave contact surface, wherein a first curvature radius of a first part at the side of the supporting surface is larger than a second curvature radius of a second part at the side of the pulley sheave contact surface.

Abstract: A power transmission chain includes a plurality of links aligned in a chain travel direction and a coupling member that includes a first power transmission member and a second power transmission member. The first power transmission member includes an opposing portion that opposes the corresponding second power transmission member and contacts the corresponding second power transmission member on a contact portion that undergoes displacement in association with a change of a bending angle between corresponding links in a contact state including at least one of rolling contact and sliding contact. The opposing portion includes an arc-shaped portion having a predetermined radius of curvature and a rate-of-change increasing portion. The arc-shaped portion includes a portion that forms the contact portion when the bending angle is equal to or greater than zero and equal to or smaller than a predetermined boundary angle.

Abstract: A metal V-belt includes a plurality of metal elements supported by a metal ring. The metal ring includes front and rear main surfaces, a pair of left and right slots that receive the metal ring therein, the slots being defined between a saddle surface and an ear-part bottom surface. A protrusion is provided on one of the front and rear main surfaces, and a concavity is provided in the other of the front and rear main surfaces. A clearance defined between an outermost peripheral surface of the metal ring and the ear-part bottom surface of the metal element is set to a value that at an exit of a driven pulley, contact of the innermost peripheral surface of the metal ring with the saddle surface of the metal element, and contact of the protrusion of a succeeding metal element and the concavity of a preceding metal element is avoided.