A method for manufacturing a metal element includes performing press processing and punching processing on a band plate-shaped metal element material having a constant cross section by a mold with a main punch in contact with a rear surface of the metal element and a counter punch in contact with the front surface thereof. The main punch or the counter punch has protrusion portions which are in contact with at least a part of the ear portion or the body portion to form a recessed portion, and a bulging portion bulging in the longitudinal direction from the radial direction inner edge of ear portions of the metal element or the radial direction outer edge of a body portion thereof, which is formed by the material extruded from the recessed portion by the protrusion portion.

A method for manufacturing a metal element includes performing press processing and punching processing on a band plate-shaped metal element material having a constant cross section by a mold with a main punch in contact with a rear surface of the metal element and a counter punch in contact with the front surface thereof. The main punch or the counter punch has protrusion portions which are in contact with at least a part of the ear portion or the body portion to form a recessed portion, and a bulging portion bulging in the longitudinal direction from the radial direction inner edge of ear portions of the metal element or the radial direction outer edge of a body portion thereof, which is formed by the material extruded from the recessed portion by the protrusion portion.

A CVT transmission device (1) comprises a drive pulley (4) provided with a mobile bushing (9), a fixed bushing (11), a cam system (95,111; 97,113) comprising at least one driven cam portion (95) of mobile bushing (9) and a cam portion (111) of the fixed bushing (11). The mobile bushing (9) comprises a main wall (91) annular with respect to the axis of rotation (X), having an inner surface (91a) which delimits a housing compartment (91c) and said driven cam portion (95) protrudes radially internally from said inner surface (91a). The drive cam portion (111) of the fixed bushing (11) is suitable to penetrate axially in said housing compartment of the mobile bushing (9).

A control apparatus for a continuously variable transmission includes a primary-pulley clamping force acquiring unit that acquires a clamping force of a primary pulley, a secondary-pulley clamping force acquiring unit that acquires a clamping force of a secondary pulley, an input torque acquiring unit that acquires a torque applied to the primary pulley, a transmission ratio acquiring unit that acquires a transmission ratio, a learning value acquiring unit, and a controller. When a learning condition is satisfied, the learning value acquiring unit decreases the clamping force of the secondary pulley while the transmission ratio and the input torque are kept substantially constant, and acquires, as a learning value, the clamping force of the secondary pulley at which a clamping force ratio is maximum. The controller adjusts a target clamping force of the secondary pulley on the basis of the learning value.

To provide an ejector mechanism of an injection molding machine that improves handling performance of a sound-proof cover while ensuring excellent sound-proof performance. An ejector mechanism of an injection molding machine comprises: a plurality of ball screws that rotates clockwise and counterclockwise about an axis to make an ejector plate and an ejector pin advance and retreat together; a plurality of driven pulleys and each connected to a corresponding one of the ball screws; a driving pulley that rotates clockwise and counterclockwise in response to the driving of a driving motor; an endless transmission belt wound on the driving pulley and the driven pulleys; an idler pulley on which the transmission belt is wound in such a manner as to define a small area of a region surrounded by the endless transmission belt wound on the driving pulley and the driven pulleys; and a sound-proof cover provided to cover the driving pulley, the driven pulleys, the idler pulley, and the transmission belt.

To provide an ejector mechanism of an injection molding machine that improves handling performance of a sound-proof cover while ensuring excellent sound-proof performance. An ejector mechanism of an injection molding machine comprises: a plurality of ball screws that rotates clockwise and counterclockwise about an axis to make an ejector plate and an ejector pin advance and retreat together; a plurality of driven pulleys and each connected to a corresponding one of the ball screws; a driving pulley that rotates clockwise and counterclockwise in response to the driving of a driving motor; an endless transmission belt wound on the driving pulley and the driven pulleys; an idler pulley on which the transmission belt is wound in such a manner as to define a small area of a region surrounded by the endless transmission belt wound on the driving pulley and the driven pulleys; and a sound-proof cover provided to cover the driving pulley, the driven pulleys, the idler pulley, and the transmission belt.

A spider is screwed to a drive shaft, includes a first screw that advances in one direction of an axial direction of the drive shaft when the spider rotates relative to the drive shaft in one direction of a circumferential direction, and is fastened to the drive shaft by the first screw. A nut is screwed to the drive shaft, includes a second screw that advances in the other direction of the axial direction of the drive shaft when the nut rotates relative to the drive shaft in one direction of the circumferential direction, and is fastened to the drive shaft by the second screw.

A continuously variable transmission device (1) for a two-, three- or four-wheel motorcycle comprises a gear shift regulation device provided with a slide (40) axially slidable and suitable to engage special rollers (18) to hold them during the gear shift. A mobile bushing (9) is suitable to influence the slide (40) to cause its translation from a rearward position to a forward limit position to engage the special rollers (18).

A continuously variable transmission including a first pulley means, a second pulley means and an elongate, flexible endless transmission element that is passed over both the first pulley means and the second pulley means, wherein the first pulley means include two sheaves which are adjustable in an axial direction of the first rotation axis line, and an adjusting means for moving the two adjustable sheaves toward and away from each other in the axial direction for setting an operative radius of the first pulley means at which the transmission element is passed over the first pulley means, wherein the first pulley means is provided with alignment means for causing the two movable sheaves to jointly move additionally in the axial direction of the first rotation axis under the influence of a force exerted in axial direction on the first pulley means by the transmission element while maintaining the operative radius.

A continuously variable transmission including a first pulley means, a second pulley means and an elongate, flexible endless transmission element that is passed over both the first pulley means and the second pulley means, wherein the first pulley means include two sheaves which are adjustable in an axial direction of the first rotation axis line, and an adjusting means for moving the two adjustable sheaves toward and away from each other in the axial direction for setting an operative radius of the first pulley means at which the transmission element is passed over the first pulley means, wherein the first pulley means is provided with alignment means for causing the two movable sheaves to jointly move additionally in the axial direction of the first rotation axis under the influence of a force exerted in axial direction on the first pulley means by the transmission element while maintaining the operative radius.