An element of a transmission including: a rocking edge portion with a convex surface formed on one of a front face and a rear face, so that the rocking edge portion extends over a pillar portion at least partially, the rocking edge portion having a contact line where the adjacent elements contact each other serves as a fulcrum of rotation of the adjacent elements; and a recessed non-contact portion extends along the saddle surface, to avoid contact with the adjacent element, and that divides the rocking edge portion in the width direction at least partially. A depth of the non-contact portion is set so that an end portion of the non-contact portion is positioned on an inner peripheral side of the transmission belt relative to the contact line when a winding radius is minimized, and the end portion does not reach the trunk portion on the inner peripheral side.

The invention relates to a belt (1) having a rear surface (2), having a data transmission device (3, 6, 7, 8, 9, 10), wherein the data transmission device (3, 6, 7, 8, 9, 10) has at least one sensor (6) having an energy supply and at least one external reader (9). The invention is based on the object of designing the data transmission device mentioned at the outset such that data from a moving belt (1) are able to be reliably transmitted to a stationary receiver (9). This object is achieved in that spaced signal surfaces (3) are arranged on the rear surface (2) of the belt (1) in the running direction of the belt (1), and each signal surface (3) is able to be switched either into a first active state or into a second inactive state by the sensor (6), wherein a positive signal is able to be transmitted in the first active state and either a negative signal or no signal is able to be transmitted in the second inactive state, and the respective state of the signal surfaces (3) is able to be acquired by the external reader (9) when the moving belt (1) runs past. Since only one item of binary information is able to be transmitted per signal surface (3), the information density, even when the signal surfaces (3) run past the reader (9) at high speed, is low enough that it is possible to reliably acquire the states of the signal surfaces (3). Reliable acquisition of the data to be transmitted by the sensor (6) is thereby guaranteed, even when the belt (1) is running at high speed.

An element of a transmission belt includes a pair of rocking edge portions with a convex surface, these are formed on one of a front face and a rear face to extend a part of the rocking edge portion over a pillar portion, and the rocking edge portions are spaced away from each other in a width direction; and a non-contact portion extended along a saddle surface in the width direction between the rocking edge portions, in non-contact with an adjacent element. S/A3.5 is satisfied, when a sum of widths of end portions of the rocking edge portions on an outer peripheral side of the transmission belt is set as A. A sum of surface areas of parts of the pillar portions on the outer peripheral side of the transmission belt is set as S.

Provided is a metal belt for a belt-driven continuously variable transmission in which metal elements are capable of keeping the compliance value small even when defamed. Each metal element of the metal belt includes a body portion located radially inward of metal rings, an ear portion located radially outward of the metal rings, and a neck portion sandwiched by the pair of metal rings and connecting the body portion and the ear portion. At least one of a front surface and a rear surface of the metal element has a recess at a center region in a right-left direction of the ear portion, and the depth of the recess is larger than the amount of curving in a front-rear direction of the ear portion.

The present invention relates to a power transmission belt containing a frictional power transmission part and a fiber member that covers a surface of the frictional power transmission part, in which the fiber member is formed of a fiber (A) containing a water-absorbent fiber (A1) and contains a surfactant, to a fiber member used in the power transmission belt, and to a method for manufacturing the fiber member.

The present invention relates to a power transmission belt containing a frictional power transmission part and a fiber member that covers a surface of the frictional power transmission part, in which the fiber member is formed of a fiber (A) containing a water-absorbent fiber (A1) and contains a surfactant, to a fiber member used in the power transmission belt, and to a method for manufacturing the fiber member.

A continuous variable transmission (CVT) system includes a drive clutch, a driven clutch and a continuous belt wherein the sheaves on one side of the CVT system have an incline of approximately 2 degrees different from the sheaves on the other side of the CVT system. The continuous belt has opposing faces, each face matching the angles of the sheaves that the belt engages.

A continuous variable transmission (CVT) system includes a drive clutch, a driven clutch and a continuous belt wherein the sheaves on one side of the CVT system have an incline of approximately 2 degrees different from the sheaves on the other side of the CVT system. The continuous belt has opposing faces, each face matching the angles of the sheaves that the belt engages.

A V-ribbed belt has a plurality of V-rib portions extending along a longitudinal direction of the belt and in parallel with one another. The V-ribbed belt includes a compression rubber layer including a frictional power transmission face at least a part of which is configured to come in contact with a V-rib groove portion of pulleys. The frictional power transmission face of the compression rubber layer is formed from a vulcanizate of a rubber composition containing a rubber component and a noise suppression improver. A V-rib angle of the V-rib portions is larger than a V-rib groove angle of the pulleys by 5 to 9.

In a friction transmission belt including a rubber layer forming a pulley contact surface, the rubber layer includes a rubber composition containing hydrophilic inorganic filler and a sliding-resistant material. The sliding-resistant material protrudes from the pulley contact surface, and is at least one of hydrophobic resin particles and hydrophobic resin fibers having an official regain of 0.4% or below, and in the rubber composition, a content of the hydrophilic inorganic filler with respect to 100 parts by mass of the rubber component is 35 parts by mass or more.