摘要:
A vehicle powertrain has an engine, a driving shaft having a passage defined therein, a driven shaft, a pump, a hydraulic fluid reservoir, and a CVT. A driving pulley of the CVT includes a fixed sheave and a movable sheave disposed on the driving shaft for rotation therewith, a spring biasing the movable sheave away from the fixed sheave, and a CVT chamber fluidly communicating with the passage of the driving shaft. The pump supplies hydraulic fluid from the reservoir to the passage in the driving shaft. The hydraulic fluid flows from the passage to the CVT chamber to create a hydraulic pressure in the CVT chamber. The hydraulic pressure in the CVT chamber biases the movable sheave toward the fixed sheave.
摘要:
A driving pulley for a CVT has a shaft, a fixed sheave mounted on the shaft, a first sleeve disposed around the shaft and being operatively connected to the shaft, a movable sheave mounted on the first sleeve, a second sleeve disposed around the first sleeve and being connected to the shaft, a spring biasing the movable sheave away from the fixed sheave, and a CVT chamber having an annular cross-section. The fixed and movable sheaves are adapted to receive a belt therebetween. The CVT chamber has at least one opening adapted for fluidly communicating the CVT chamber with a hydraulic fluid reservoir. Hydraulic pressure in the CVT chamber biases the movable sheave toward the fixed sheave. The CVT chamber has an inner wall formed by the first sleeve, an outer wall formed by the second sleeve, an outer end, and an inner end formed by the movable sheave.
摘要:
A double piston and belt type continuously variable transmission comprises a primary pulley provided with a primary piston chamber and a primary clamp chamber; a secondary pulley provided with a secondary piston chamber and a secondary clamp chamber; and an endless belt operatively put around the primary and secondary pulleys. A switching circuit is arranged to connect both the primary and secondary clamp chambers to either one of the primary and secondary piston chambers, which shows a higher hydraulic pressure than the other.
摘要:
A circumferential groove 36 is formed in an outer peripheral surface of a secondary shaft 23 at a position close to an end portion where the plunger 35 is disposed. A cotter 37 is fitted in this circumferential groove 36. The cotter 37 restricts the plunger 35 from moving toward the end portion side of the secondary shaft 23 by abutting against the plunger 35. An elevated portion 38 having a flat distal end is formed on a surface portion 35b which is on an inside portion 25a side of the plunger 35 and which abuts against the cotter 37. Even if the cotter 37 is tilted (is swung) in the circumferential groove 36 due to a load from the plunger 35 which received the oil pressure of working oil supplied to a secondary hydraulic chamber 33 through oil holes 43 and 44, the elevated portion 38 controls the portion of contact between the plunger 35 and the cotter 37 to a substantially fixed position.
摘要:
A belt type continuously variable transmission is provided with two pulley shafts (51,61) arranged in parallel a predetermined distance apart from each other, a movable sheave (53) on each pulley shaft, the movable sheaves (53,63) being able to slide in an axial direction on the pulley shafts a fixed sheave (52) arranged on each pulley shaft so as to face the moveable sheave (3) on each pulley shaft the fixed sheave and the movable sheave that face each another on each pulley shaft together forming a groove (80a) therebetween, and a belt wound around the grooves between the moveable sheaves and the fixed sheaves that face one another. At least one of the movable sheaves and a motor (550) serving as a driving source for the moving sheave are integrally provided.
摘要:
The invention relates to a device for hydraulically adjusting a set of discs (14) of a continuously variable transmission for motor vehicles, comprising an interaxle differential (16), which is coaxially adjacent to the set of discs and whose differential case (56) is drive-connected to the set of discs. The axially displaceable idler disc (20) of the set of discs interacts with at least one annular hydraulic chamber (30, 32) and with an adjusting piston (38) guided therein and can be displaced by being subjected to the action of pressure. The hydraulic medium can be supplied via corresponding ducts (110, 114, 112, 108) and via a hydraulic control. A design that is advantageous both with regard to structure as well as to manufacturing is characterized in that the hydraulic medium is guided via at least one duct (110) inside the differential case (56), and this duct communicates via supply connections (114, 86) with the set of discs, and with supply ducts (106) that are situated inside the transmission housing.
摘要:
Eine Festscheibenbaugruppe für ein Kegelscheibenumschlingungsgetriebe enthält eine starr mit einer Eingangswelle (10) verbundene Festscheibe (12) eine Antriebswelle (18), eine Reibungskupplung (38) mit einem drehfest mit der Antriebswelle (18) verbundenen Eingangsglied (26,30,96) und einem in reibschlüssigen Eingriff mit dem Eingangsglied bringbaren Ausgangsglied sowie eine zwischen dem Ausgangsglied (40) und der Festscheibe (12) wirksame Drehmomentfühleinrichtung (56) mit einer starr mit der Festscheibe (12) verbundenen Spreizfläche (54) und einem axial relativ zur Festscheibe (12) beweglichen Fühlglied (60). Das Ausgangsglied (40) der Reibungskupplung (38) ist an der von der Kegelfläche (14) abgewandten Seite der Festscheibe (12) angeordnet und koaxial zur Eingangswelle (10) drehbar gelagert. Das Fühlglied (60) ist an einer äußeren Umfangsfläche des Ausgangsgliedes axial beweglich und in Umfangsrichtung unbeweglich geführt.
摘要:
A belt-type continuously variable transmission (3) comprises a drive pulley (10) including cylinder (20) and cramp chambers (30) which vary an effective radius of the drive pulley (10) when applied with a hydraulic pressure, a driven pulley (40) including cylinder (60) and cramp chambers (50) which vary an effective radius of the driven pulley (40) when applied with a hydraulic pressure, a belt operatively put around the drive (10) and driven pulleys (40) and a hydraulic circuit that applies the cylinder (80,60) and cramp chambers (30,50) of the drive (10) and driven pulleys (40) with the hydraulic pressure to vary the effective radii of the drive (10) and driven pulleys (40). The hydraulic circuit includes a line pressure passage that has a line pressure regulating valve (110) installed therein for producing a line pressure in the line pressure passage. The cramp chambers of the drive (10) and driven pulleys (40) are substantially the same in a pressure receiving area and are connected to the line pressure passage to be fed with the line pressure.