Abstract:
A belt-type continuously variable transmission includes a primary sheave including a pair of first clamp surfaces, a secondary sheave including a pair of second clamp surfaces, and a belt endlessly wound between both of the primary and secondary sheaves. The belt includes contact surfaces clamped between the first clamp surfaces and between the second clamp surfaces. Powder having infusibility as a friction enhancing material is held on at least one of the first clamp surfaces of the primary sheave, the second clamp surfaces of the secondary sheave, and the contact surfaces of the belt.
Abstract:
Wear of a V-belt and wear of sheaves in a belt type continuously variable transmission is compatibly prevented. A V-belt wound around a primary sheave\ and a secondary sheave is formed with a resin block belt. A sheave surface of the primary sheave is plated with chrome. The secondary sheave is made of stainless steel and is not plated with chrome. The sheave surface hardness of the secondary sheave is lower than the sheave surface hardness of the primary sheave.
Abstract:
Improved cooling capacity for a V-belt continuously variable transmission that is compatible with miniaturization of a vehicle body cover is provided in a saddle-ride type vehicle. A concave-shaped space recessed downward is compartmented forward of a seat by a vehicle body cover. An engine unit is supported by the vehicle body frame below the concave-shaped space. The engine unit includes a transmission case formed with a belt chamber in which a V-belt continuously variable transmission is accommodated. An intake duct defines an air passage communicated to the belt chamber. The intake duct is arranged between the transmission case and a leg shield.
Abstract:
A belt-type continuously variable transmission includes a primary sheave including a pair of first clamp surfaces, a secondary sheave including a pair of second clamp surfaces, and a belt endlessly wound between both of the primary and secondary sheaves. The belt includes contact surfaces clamped between the first clamp surfaces and between the second clamp surfaces. Powder having infusibility as a friction enhancing material is held on at least one of the first clamp surfaces of the primary sheave, the second clamp surfaces of the secondary sheave, and the contact surfaces of the belt.
Abstract:
According to some preferred embodiments, a clutch housing (46) of a clutch (2) has a bottom portion (46a) in a closed-end cylindrical shape, a plurality of arms (46d) extending along an axial direction from the bottom portion (46a) and provided along a circumferential direction centering on an axial center (C) of the clutch shaft (33), and a plurality of gaps (46e) formed between adjacent arms (46d). Off-springs (71) are arranged in the gaps and extend along the axial direction.
Abstract:
A belt-type continuously variable transmission that prevents escape of noise generated by a resin block belt to the outside. The resin block belt is wound around a primary sheave and a secondary sheave. A transmission case defines a belt chamber accommodating the primary sheave, secondary sheave, and resin block belt. The transmission case includes an exhaust passage, intake passages, and a sound absorbing member. The sound absorbing member is attached to an inner wall of the exhaust passage in a position to collide with sound waves traveling through the exhaust passage. The sound absorbing member has a sound absorbing surface crossing an extending direction of the exhaust passage.
Abstract:
A belt-type continuously variable transmission that is easily manufactured includes a belt wound around a primary sheave and a secondary sheave. The primary sheave includes a fixed sheave member, a movable sheave member, a cam plate, and a roller weight. The movable sheave member has a guide rib extending toward the cam plate. The cam plate has a slider having a guide groove. The position of the radially outer portion of an end surface of the slider is shifted toward the right in the rotation axis extending direction from the position of the radially inner portion of the end surface.
Abstract:
A clutch includes an automatic play adjusting mechanism interposed between a pressure plate and a pull rod, to allow movement of the pressure plate relative to the pull rod in a clutch axial direction in a clutch connected state, and to restrict the movement of the pressure plate relative to the pull rod in the clutch axial direction when the pull rod moves more than a prescribed play amount in the clutch axial direction. As a result, the clutch can restrict the shift of a touch point caused by thermal expansion or wear, and the play amount of the clutch can be adjusted automatically.
Abstract:
A cam face 81 and a cam face 181 are formed in such a manner that an angular velocity ω represented by the following equation increases when a parameter R increases and the angular velocity ω decreases when the parameter R decreases, ω2=(1/m)·[F(tan α+tan β)/R], where the mass of the centrifugal weight (41) is m, the revolution radius that is the distance from the rotation center (0) of the centrifugal weight (41) to the center of gravity of the centrifugal weight (41) is R, the angle formed by a radial line (L0) and a tangent line (L1) of a point of the cam face (81) being in contact with the centrifugal weight (41) is α, the angle formed by a radial line (L0) and a tangent line (L2) of a point in the cam face (181) being in contact with the centrifugal weight (41) is β, and the urging force of a Belleville spring that urges a roller retainer (78) is F.
Abstract:
A noise preventing means for a motorcycle including a belt type continuously variable transmission using a resin block belt. An end of an intake duct for inducting cooling air into a belt chamber inside a transmission casing is connected to a front half part of the transmission casing. The intake duct extends upward from the transmission casing, then curves rearward, and extends rearward passing over a seat pillar. An air chamber is connected to a rear end of the intake duct. The intake duct has a curving part curving around the seat pillar.