Patent ID: 8834307
Filing Date: 2014-09-16
Classification: F16H

Abstract:
1. A belt-type continuously variable transmission comprising: a drive pulley assembly mounted to a drive shaft; a driven pulley assembly mounted to a driven shaft; a belt wrapped around the drive pulley assembly and the driven pulley assembly; and a case assembly for accommodating the drive pulley assembly, the driven pulley assembly, and the belt; wherein the drive pulley assembly has fins for generating a flow of air moving toward an outer periphery of the drive pulley assembly according to a rotation of the drive pulley assembly, the fins positioned on a surface at one side of the drive pulley assembly in an axial direction; the case assembly includes a peripheral wall portion surrounding the drive pulley assembly, the driven pulley assembly, and the belt; and when viewed in an axial direction of the drive shaft, an air blocking plate is positioned on a forward side of an imaginary line segment relative to a rotational direction of the drive pulley assembly, the imaginary line segment beginning at a center axis of the drive pulley assembly and ending at a center axis of the driven pulley assembly, the air blocking plate being positioned between the drive pulley assembly and the driven pulley assembly such that the air blocking plate has a circular-arc shape partially covering the outer periphery of the drive pulley assembly, the air blocking plate being disposed in the case assembly so as to be positioned away from the belt in the axial direction toward the fins and so as to face the fins of the drive pulley assembly in a radial direction of the drive shaft.