摘要:
A toroidal continuously variable transmission including input and output disks having a common first rotation axis about which the disks are rotatable, and a power roller swingably interposed between the disks and having a second rotation axis intersecting the first rotation axis, about which the power roller is rotatable. The input and output disks and the power roller have traction surfaces cooperating with each other to transmit rotation therebetween. At least one of the input and output disks and the power roller has a surface roughness on the traction surface thereof which varies in a direction of the rotation axis thereof.
摘要:
A rotary assembly for traction drives, including a plurality of rolling elements having a rotation axis and traction contact surfaces around the rotation axis and associating with each other to transmit a motive power between the rolling elements via a traction oil film formed between the traction contact surfaces, in which at least one of the traction contact surfaces has a microstructure with irregularities which sizes are larger than a thickness of the traction oil film. The process for the traction contact surface is also disclosed.
摘要:
A toroidal-type continuously variable transmission (CVT), including rolling elements having traction surfaces cooperating with each other to transmit a power between the rolling elements via a traction oil film formed between the traction surfaces. The traction surfaces have the microstructure that is defined with respect to a thickness of the traction oil film formed when the temperature of the traction portion of the traction surface is high, to thereby exhibit high traction coefficient even in the high-temperature operating condition.
摘要:
A rotary assembly for traction drives, including a plurality of rolling elements having a rotation axis and traction contact surfaces around the rotation axis and associating with each other to transmit a motive power between the rolling elements via a traction oil film formed between the traction contact surfaces, in which at least one of the traction contact surfaces has a microstructure with irregularities which sizes are larger than a thickness of the traction oil film. The process for the traction contact surface is also disclosed.
摘要:
A pulley for use with an endless metal belt, including pulley halves rotatable about an axis. The pulley halves include truncated conical portions symmetrically opposed to each other and outer surfaces disposed on the truncated conical portions so as to be engageable with the belt. The outer surface of each pulley half has a centerline average roughness (Ra) of 0.1 to 0.5 &mgr;m, a Vickers hardness (Hv) of not less than 850 at a load of 200 g, and a microstructure with random fine irregularities in which a great number of recesses and projections are randomly located. A continuously variable transmission including the pulley is also disclosed.
摘要:
A traction drive rotary assembly including a plurality of rolling elements having traction contact surfaces associating with each other to transmit power between the rolling elements. At least one of the traction contact surfaces has a surface microstructure including grooves and protrusions alternately arranged. The surface microstructure is represented by an unfiltered primary profile curve including recesses and projections corresponding to the grooves and the protrusions. Each projection includes a portion located higher than a center line of the unfiltered primary profile curve and having a shape selected from a generally trapezoidal shape with rounded corners, a generally crowning shape, a generally elliptic arc shape, a generally sinusoidal shape and a generally triangular shape with a rounded apex. A ratio &lgr;/AMP of a wavelength &lgr; of the unfiltered primary profile curve to a half depth AMP of the recess is in a range of 50-400.
摘要:
A sliding device is comprised of a first sliding member which is rotatable on an axis of the first sliding member, a second sliding member which slidably supports the first member through viscous fluid and at least a pit which is formed on a surface of at least one of the first and second sliding members so as to promote a viscous fluid flow, which has a component of a rotational direction of the shaft when the first member is rotated.
摘要:
An inexpensive bonding method is provided to bond materials constituted of an aluminum-based metal to each other at a low temperature and a low pressure while inhibiting deformation, without requiring the use of a flux and minimizing the influence on the base materials and the periphery. Also provided are various bonded parts obtained by the bonding method. An insert material comprising Zn as an element that undergoes a eutectic reaction with Al is interposed between two materials constituted of an aluminum-based metal. The two materials are heated, while being pressed against each other, to a temperature at which the eutectic reaction takes place, thereby generating, at the bonding interface between the two materials, a melt due to the eutectic reaction with some of the Al contained in the base materials and discharging the Al oxide films from the bonding interface together with the melt. Thus, the two materials are bonded.
摘要:
According to one aspect of the present invention, there is provided a low-friction sliding member having a sliding surface slidable relative to an opposing member via an oil, wherein the sliding surface has a plurality of texture groups, each of the texture groups consists of at least two adjacent fine recesses having portions aligned to each other in either a sliding direction or oil flow direction; a distance between the texture groups is larger than a distance between the adjacent recesses; and the texture groups is distributed uniformly over the sliding surface.
摘要:
A high bearing pressure-resistant member used as a rolling element forming part of a toroidal continuously variable transmission for an automotive vehicle. The high bearing pressure-resistant member is formed of a mechanical structural steel containing Cr. The mechanical structural steel includes a matrix having at least one of martensite structure and bainite structure. The matrix contains carbide having a mean particle size of 3 &mgr;m or less, dispersed and precipitated in form of at least one of generally spheres and pseudo-spheres.