Abstract: A V surface of a pulley with which a metal element comes in contact includes first grooves extending spirally from a side of a rotation axis of the pulley to an outer side in a radial direction and one side in a circumferential direction, second grooves extending spirally to the outer side in the radial direction and the other side in the circumferential direction, and rhomboid protrusions surrounded thereby. An average circumferential width of the protrusions is smaller at a position on the inner side in the radial direction than at a position on the outer side in the radial direction. Therefore, at a position on the inner side in the radial direction of the V surface in which cracks easily occur, the average circumferential width of the protrusions is lower, such that cracks occurring on the protrusions are prevented by the grooves, and further extension of cracks is prevented.

Abstract: Disclosed is a polyamide resin composition, including: a polyamide (A) containing a diamine unit including 70 mol % or more of a p-xylylenediamine unit and a dicarboxylic acid unit including 70 mol % or more of a linear aliphatic dicarboxylic acid unit having 6 to 18 carbon atoms; and a filler (B), in which the polyamide (A) includes a polyamide having a phosphorus atom concentration of 50 to 1,000 ppm and a YI value of 10 or less in a color difference test in accordance with JIS-K-7105, and a content of the filler (B) is 1 to 200 parts by mass with respect to 100 parts by mass of the polyamide (A).

Abstract: A device, in a continuously variable belt transmission system, for guiding a conical pulley (3) of a variator on a variator shaft (1). The moveable conical pulley (3) is fitted onto two bearing sections (4, 5) of the variation shaft (1). At least one cylindrical pin (6), which is fitted into an axial guide grove (7) in the variator shaft (1) and an axial guide groove (8) of the movable conical pulley (3), is provided to transfer torque between the movable conical pulley (3) and the variator shaft (1).

Abstract: A continuously variable transmission (“CVT”) is disclosed. The CVT includes a drive pulley adapted to connect to a crankshaft of an engine. The drive pulley has inner and outer halves with belt engagement surfaces to engage the sides of the belt. The drive pulley of the CVT also includes a slide sleeve disposed on the shaft adapted to engage an inner side of a belt. The inner and outer halves of the drive pulley are biased apart from one another by a spring. The slide sleeve engages the belt when the belt is stationary or traveling at low speeds. The driven pulley includes inner and outer halves with belt engagement surfaces. The two halves are biased into contact with one another. A connector connects the inner half to the outer half. In addition, a pneumatically-actuated driven pulley is described together with a CVT incorporating same.

Abstract: The invention features a three piece variable pitch sheave. In one embodiment, a pair of flanges are positioned on a rotatable central member. One of the flanges is secured in a fixed position, and may contact an abutment surface to locate it on the rotatable central member. The other flange is adjustably positionable on the rotatable central member, such as by engagement of complementary threads on the flange and the rotatable central member. Torque is transmitted between the first flange and the rotatable central member, such as via cooperating flat surfaces. The flanges may be made as identical elements, such as by a powdered metallurgy process.

Abstract: A variable speed transmission includes an actuator mechanism that can be remotely activated to cause engagement of a drive unit and to subsequently vary the speed of the drive unit using the same activation mechanism. The variable speed transmission can include a first pulley that has a first and second face that are movable relative to each other by activation of the actuator mechanism. When the first and second faces of the first pulley are located in a first position, a belt located on the first pulley remains motionless. The first and second faces can be moved by the actuator mechanism into a second position where the first and second plates engage the belt with enough frictional force to cause the belt to start moving about the first pulley. The first and second faces of the first pulley can also be moved between the second position and a third position such that the space between the faces becomes smaller.

Abstract: A ball screw in a continuously variable speed transmission has an axially immovable pulley half (2) and axially movable pulley half (3) both mounted on a rotary shaft (4). The axially movable pulley half (3) is moved by a ball screw (20) so as to infinitely vary the belt wrapping radius and thus the transmission speed. A nut (22), forming one part of the ball screw (20), is immovably secured in both axial and rotational directions. A screw shaft (21), forming the other part of the ball screw (20), is movable in both axial and rotational directions. The screw shaft 21 is connected to the axially movable pulley half (3). The axially movable pulley half (3) is axially moved by rotating the screw shaft (21).

Abstract: A belt tensioner for tensioning a belt for a motor vehicle comprises a pivot shaft, a pivoting structure mounted for pivotal movement on the pivot shaft, and a pulley mounted for rotation on the pivoting structure. A spring biases the pivoting structure in a direction that moves the pulley mounted on the pivoting structure into tensioning engagement with the belt. A bolt is constructed and arranged to mount the belt tensioner on the motor vehicle engine mount. The bolt is constructed and arranged to be tightened to a predetermined extent for installing the tensioner of the motor vehicle, the predetermined extent is the same extent to which the bolt is tightened during normal operation of the tensioner. A clamping structure applies a predetermined clamping force on the pivot shaft after the bolt is tightened to the predetermined extent.

Abstract: The assembly includes an input member having a radial surface and fitted integrally with a coaxial drive shaft; and a pulley fitted coaxially to and idle with respect to the drive shaft and having two half-pulleys connected to each other to rotate integrally and move axially with respect to each other, and which engage a drive belt. There is also provided a thrust-clutch member, which is connected to the drive shaft so as to rotate integrally with and move axially with respect to the drive shaft, and is located adjacent to the second half-pulley.

Abstract: A sliding key slidable in an axial direction of a rotary shaft and engaging a sliding cylinder such that the sliding key follows a rotation of the sliding cylinder. The sliding key is a molded product of a metal-molded part and a resinous part. The sliding key does not malfunction or fail when it is used in an environment of a high temperature and a high load.

Abstract: A top housing supported by a vertical post in a drilling machine is provided with a belt transmission mechanism incorporating a speed adjusting mechanism which can be operated easily and manually. The adjusting mechanism includes a knob connected to an adjusting rod which in turn is connected to a movable cone-shaped disk. The adjusting rod has a helical thread engaging with a projection of a fixed annular seat through which the adjusting rod passes. The adjusting rod is moved axially when rotated and moves the movable cone-shaped disk with respect to a fixed cone-shaped disk. A locking nut is threadedly sleeved around the annular seat to prevent the adjusting rod from rotation when the nut is tightened. The top housing is mounted movably on the vertical post and normally moved upward by a compression spring.

Abstract: An adjustable V-belt pulley which may be selectively changed form one predetermined effective diameter to another without tools. The pulley comprises first and second separable pulley halves having juxtaposed frusto-conical faces adapted to receive a V-belt pulley therebetween. A plurality of spaced lugs extend axially from the first pulley half and a plurality of sets of cavities are provided in the second pulley half, each set being adapted to receive the lugs of the first pulley half. Each cavity set has a different cavity depth so that the effective pulley diameter is established by the choice of the cavity set into which the lugs are inserted. The pulley halves are concentrically disposed on a shaft and are held together by a wing nut or knurled nut on the threaded shaft end which clamps the pulley halves against a shoulder of the shaft.

Abstract: An adjustable pulley construction including a first disc having a belt-engaging surface and a centrally located, internally threaded annular hub, the hub having an exterior flat face and an interior recess; and a second disc having a belt-engaging surface and a centrally located annular externally threaded axle, the annular hub of the first disc being coaxially with and movable relative to the axle. The belt-engaging surfaces are positioned in facing relationship to receive a pulley belt therebetween. Securing elements for maintaining a desired space relation between the discs, the securing elements include: a threaded bore disposed in the hub transverse to the axle, a set screw received in the bore, a longitudinal keyway in the hub communicating with the bore, a keyway land provided on the axle in line with the set screw, and a generally H-shaped key. The key is positioned within the recess in the hub and engaged by the set screw to provide a frictional clamping action of the key onto the keyway land.

Abstract: The infinitely variable cone disk-wrapping vee belt drive comprises a pair of coaxial cone disks defining between them a vee-shaped groove and comprising an axially fixed, first cone disk and a second cone disk, which is axially displaceable relative to said first cone disk. A vee belt is trained around said first and second cone disks in said vee-shaped groove. First spring means urge said second cone disk axially toward said first cone disk. Locking means are provided, which are non-rotatably connected to one of said cone disks and movable to a locking position, in which said locking means hold said second cone disk against an axial displacement. Second spring means are provided, which urge said locking means to said locking position. Said locking means are arranged to unlock said second cone disk in response to a centrifugal force acting on said locking means and overcoming the force of said second spring means.

Abstract: A first pulley disc having an inner tubular-shaped member extending concentrically at right angles from the center of said first disc. The inner hub is formed with an externally threaded annular portion adjacent the disc and a smooth surfaces, cylindrical outer end portion. A pair of diametrically opposed slots is formed in the outer end portion and extend in an axial longitudinal direction toward the threaded portion. A second pulley disc having an outer cylindrical-shaped hub member extending concentrically at right angles from the center of said second disc. The outer hub member has an internally threaded end portion adjacent the second disc and an annular internally recessed outer end portion. A threaded opening extends radially through the outer hub member and into the internal recessed portion. The internally threaded portion of the outer hub is engaged with the externally threaded portion of the inner hub for selectively spacing complementary marginal belt engaging surfaces of the disc.