A continuously variable transmission includes: a CVT mechanism including a driving pulley, a driven pulley, an annular belt wound around the driving pulley and the driven pulley, and a centrifugal fan blade disposed at the driving pulley; and a CVT case that defines an internal space accommodating the CVT mechanism. An inner surface of the CVT case includes: a peripheral surface portion that covers the CVT mechanism from an outer side in a radial direction orthogonal to an axial direction of the driving pulley; and a guide surface portion that projects toward an inner side in the radial direction from the peripheral surface portion.

A continuously variable transmission includes: a CVT mechanism including a driving pulley, a driven pulley, an annular belt wound around the driving pulley and the driven pulley, and a centrifugal fan blade disposed at the driving pulley; and a CVT case that defines an internal space accommodating the CVT mechanism. An inner surface of the CVT case includes: a peripheral surface portion that covers the CVT mechanism from an outer side in a radial direction orthogonal to an axial direction of the driving pulley; and a guide surface portion that projects toward an inner side in the radial direction from the peripheral surface portion.

The present invention relates to relates to an improvement of a dividing wall for a primary pulley in a belt-type continuously variable transmission. It is an object of the present invention to obtain a desired strength characteristic without performing a soft nitriding treatment and achieve cost reduction. A hydraulic pressure chamber is formed between the dividing wall and the movable sheave, and the dividing wall comprises a small-diameter annular disc portion 32 extended from the central cylinder portion 30, which is attached to a rotational shaft, in a radial direction. In the small-diameter annular disc portion 32, a connecting portion which is connected to an intermediate body portion 34 is a bent portion 38 which is bent at substantially 90 [deg]. In a cross-section of an inner peripheral surface of the bent portion 38, the inner peripheral surface of the bent portion 38 is constituted by an inner radius side arc 40-1 whose origin position is O.sub.1 and curvature radius is R.sub.1, an outer radius side arc 40-2 whose origin position is O.sub.2, which is a different position from the origin position O.sub.1 of the inner radius side arc 40-1, and curvature radius is R.sub.2, which is a different value from the curvature radius R.sub.1 of the inner radius side arc 40-1, and an intermediate portion 40-3 that the inner radius side arc 40-1 is smoothly connected to the outer radius side arc 40-2. By adopting the above shape, when a load is applied to the dividing wall, a stress value at a concave surface 40 can be reduced, and desired durability can be obtained without performing the soft nitriding treatment and achieve cost reduction.

The present invention relates to relates to an improvement of a dividing wall for a primary pulley in a belt-type continuously variable transmission. It is an object of the present invention to obtain a desired strength characteristic without performing a soft nitriding treatment and achieve cost reduction. A hydraulic pressure chamber is formed between the dividing wall and the movable sheave, and the dividing wall comprises a small-diameter annular disc portion 32 extended from the central cylinder portion 30, which is attached to a rotational shaft, in a radial direction. In the small-diameter annular disc portion 32, a connecting portion which is connected to an intermediate body portion 34 is a bent portion 38 which is bent at substantially 90 [deg]. In a cross-section of an inner peripheral surface of the bent portion 38, the inner peripheral surface of the bent portion 38 is constituted by an inner radius side arc 40-1 whose origin position is O.sub.1 and curvature radius is R.sub.1, an outer radius side arc 40-2 whose origin position is O.sub.2, which is a different position from the origin position O.sub.1 of the inner radius side arc 40-1, and curvature radius is R.sub.2, which is a different value from the curvature radius R.sub.1 of the inner radius side arc 40-1, and an intermediate portion 40-3 that the inner radius side arc 40-1 is smoothly connected to the outer radius side arc 40-2. By adopting the above shape, when a load is applied to the dividing wall, a stress value at a concave surface 40 can be reduced, and desired durability can be obtained without performing the soft nitriding treatment and achieve cost reduction.

A drive clutch having an engine braking feature for a continuously variable transmission is provided. The drive clutch includes a post that is coupled to an output of an engine. A fixed sheave, coupled to the post, has a fixed sheave belt engagement face. A movable sheave assembly that includes a movable sheave belt engaging face, is configured to move axially on the post to move the movable sheave belt engaging face in relation to the fixed sheave belt engaging face depending on a rotational speed of the drive clutch. An idler bearing is mounted on the post at least in part between the movable sheave belt engaging face and the fixed sheave belt engaging face. The idler bearing includes a one-way rotational assembly and has an outer belt engaging surface with outward extending cogs configured to engage teeth of a belt to prevent slippage during engine braking.

A drive clutch having an engine braking feature for a continuously variable transmission is provided. The drive clutch includes a post that is coupled to an output of an engine. A fixed sheave, coupled to the post, has a fixed sheave belt engagement face. A movable sheave assembly that includes a movable sheave belt engaging face, is configured to move axially on the post to move the movable sheave belt engaging face in relation to the fixed sheave belt engaging face depending on a rotational speed of the drive clutch. An idler bearing is mounted on the post at least in part between the movable sheave belt engaging face and the fixed sheave belt engaging face. The idler bearing includes a one-way rotational assembly and has an outer belt engaging surface with outward extending cogs configured to engage teeth of a belt to prevent slippage during engine braking.

A motor vehicle includes a motor and a transmission including a drive shaft driven by the motor and connecting the motor to the transmission, a first output shaft extending along the vehicle longitudinal axis in the one direction, which first output shaft is connected to a wheel axle by a first differential, and a second output shaft extending along the vehicle longitudinal axis in the opposite direction, which second output shaft is connected to a second wheel axle by a second differential, characterized in that the drive shaft is disposed in the longitudinal axis of the motor vehicle and the first and the second output shaft are disposed on opposing sides relative to the longitudinal axis of the motor vehicle with identical spacing with respect to the longitudinal axis of the motor vehicle.

A motor vehicle includes a motor and a transmission including a drive shaft driven by the motor and connecting the motor to the transmission, a first output shaft extending along the vehicle longitudinal axis in the one direction, which first output shaft is connected to a wheel axle by a first differential, and a second output shaft extending along the vehicle longitudinal axis in the opposite direction, which second output shaft is connected to a second wheel axle by a second differential, characterized in that the drive shaft is disposed in the longitudinal axis of the motor vehicle and the first and the second output shaft are disposed on opposing sides relative to the longitudinal axis of the motor vehicle with identical spacing with respect to the longitudinal axis of the motor vehicle.

A continuously variable transmission (CVT) is provided for use on a recreational or utility vehicle. The CVT is electronically controlled by a control unit of the vehicle. The CVT includes a primary clutch having a first sheave, a second sheave movable relative to the first sheave, and a friction clutch. An actuator assembly is configured to actuate the primary clutch and cause movement of the second sheave.

Described are an oscillation amplitude control component, home electrical equipment and an oscillation amplitude control method and device. The component includes: a V-shaped grooved gear, a pressure pump, a roller with a pre-formed groove and a transmission belt; the V-shaped grooved gear includes a central shaft and two frustoconical members mounted on the central shaft; lateral surfaces of two frustoconical members and the central shaft enclose a V-shaped groove; a gear is arranged on a circumference of a frustoconical member, and joined with an oscillating switch selectively; the transmission belt is configured to surround the V-shaped groove and the pre-formed groove; two frustoconical members regulate a surrounding radius of the transmission belt surrounding the V-shaped groove under control of pressure generated by the pressure pump; and the roller is fixed in an oscillating plate, and controls an oscillation amplitude of the home electrical equipment through the oscillating plate.