An automotive V-belt nonstage transmission includes a drive pulley having a fixed sheave fixedly mounted on a drive shaft, a movable sheave mounted on the drive shaft, a return coil spring, a flyweight mechanism, a collar being rotatable relative to the fixed and movable sheaves is mounted rotatably
An automotive V-belt nonstage transmission includes a drive pulley having a fixed sheave fixedly mounted on a drive shaft, a movable sheave mounted on the drive shaft, a return coil spring, a flyweight mechanism, a collar being rotatable relative to the fixed and movable sheaves is mounted rotatably on the drive shaft, and a one-way clutch mounted between the collar and the drive shaft interlocks the collar and the drive shaft so that only the rotation of the collar in the normal rotating direction is transmitted to the drive shaft. The collar has an outer surface serving as a bottom surface of a V-groove defined by the respective conical pressure surfaces of the fixed and the movable sheave of the drive pulley, and a conical surface forming a central part, around the drive shaft, of the conical pressure surface of the fixed sheave of the drive pulley.
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1. An automotive V-belt nonstage transmission, comprising:a drive pulley having a fixed sheave fixedly mounted on a drive shaft so as to move integrally with the drive shaft and having a conical pressure surface, a movable sheave mounted on the drive shaft, restrained from rotation relative to the d
1. An automotive V-belt nonstage transmission, comprising:a drive pulley having a fixed sheave fixedly mounted on a drive shaft so as to move integrally with the drive shaft and having a conical pressure surface, a movable sheave mounted on the drive shaft, restrained from rotation relative to the drive shaft, capable of axially moving on the drive shaft and having a conical pressure surface;a driven pulley;a V-belt extended between the drive and the driven pulley;a return coil spring pushing the movable sheave of the drive pulley so as to part from the fixed sheave;a flyweight mechanism capable of pushing the movable sheave of the drive pulley toward the fixed sheave of the drive pulley as rotating speed of the drive shaft increases; anda clutch mechanism including a collar being rotatable relative to the fixed and movable sheaves and mounted rotatably on the drive shaft, and a one-way clutch mounted between the drive shaft and the collar, interlocking the collar and the drive shaft and capable of transmitting only rotation of the collar in the normal rotating direction to the drive shaft, andthe collar having an outer periphery surface serving as a bottom surface of a V-groove defined by the respective conical pressure surfaces of the fixed and the movable sheave of the drive pulley, and a conical surface forming a conical pressure surface corresponding to a central part, around the drive shaft, of the conical pressure surface of the fixed sheave of the drive pulley.2. The automotive V-belt nonstage transmission according to claim 1, further comprising an auxiliary coil spring capable of counterbalancing centrifugal force produced by the flyweight mechanism while an engine driving the drive shaft is operating at an idling speed in which the movable sheave of the drive pulley is at least in contact with a side contact surface of the V-belt, and wherein the return coil spring and the auxiliary coil spring are connected in series.3. The automotive V-belt nonstage transmission according to claim 2, wherein the auxiliary coil spring has a resilient force lower than that of the return coil spring.4. The automotive V-belt nonstage transmission according to claim 2, wherein the auxiliary coil spring surround a part of the return coil spring, and the return coil spring and the auxiliary coil spring are connected in series by an annular connecting member having a stepped cross section.5. The automotive V-belt nonstage transmission according to claim 1, wherein a central part of the conical pressure surface of the movable sheave is recessed to form a recess extending radially around the collar, and a radial of the recess being smaller than a height of the V-groove.6. The automotive V-belt nonstage transmission according to claim 5, wherein the radial height of the recess is equal to about ⅔ of the height of the V belt.7. The automotive V-belt nonstage transmission according to claim 1, wherein a radial height of the conical surface of the collar is substantially equal to the height of the V belt.
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이 특허에 인용된 특허 (5)
Korenjak, Norbert; Oberroither, Wolfgang; Heer, Siogfried; Kusel, Heinz, Continuously variable transmission for an internal combustion engine.
Johnson Mitchell D. ; Lislegard Gregory G. ; Trihey Michael R. ; Corneliusen Steven D. ; Anderson Joel H. ; Johnson Steven L. ; Walton Barry ; Ochab David C. ; Barron Brent, Continuously variable transmission system with engine braking.
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