A belt drive device includes a first pulley, a second pulley, a first bulging portion, a belt, and a pressing portion. The first bulging portion is formed along an outer periphery of the second pulley to bulge outward in a radial direction of the second pulley at a center of the second pulley in an axial direction of the second pulley. The belt is stretched between the first pulley and the first bulging portion. The pressing portion presses an outer peripheral surface of the belt at a center of the belt in a width direction of the belt.

A high torque sprocket includes a body formed of a castable polymer material defining an outer periphery and a recessed hub section defining an inner surface for engaging a bushing having a smooth circular outer surface and at least one threaded port for securing with the high torque sprocket. A continuous toothed structure is disposed on the outer periphery of the body, which has a circular pitch. A textile reinforcement may be embedded in the body adjacent the inner surface of the hub section. The hub section inner surface is of a tapered shape and adapted to engage a conventional QD bushing or a taper-lock bushing. The continuous toothed structure may have a plurality of S-shaped grooves for engaging a belt and having a groove width, and the ratio of the groove width to the circular pitch may be 0.65 or less, or even a value selected from the range of 0.50 to 0.65.

A pulley is disclosed. The disclosure provides a pulley. The pulley is made up of a frame and a wheel. The frame includes a first and second plate spaced apart from each other. The wheel is rotatably connected between the first and second plate. The first and second plate each include an extended portion extending in a common direction beyond the radius of the wheel. The extended portion of the first and second plate each include a ramp for guiding a line onto the wheel. Also disclosed is a method for making the pulley.

A driven sprocket configured for rotational use in a linear actuator is provided. The driven sprocket includes an outer circumferential surface extending radially from a main body. The outer circumferential surface has a plurality of spaced apart gear teeth configured to engage corresponding structures of a drive belt. An upper rim and a lower rim bound the outer circumferential surface and are configured to maintain a drive belt in an engaged position with the gear teeth. A plurality of internal apertures extend therethrough and are configured to receive portions of a lead screw and portions of a torque limiter. A plurality of spaced apart apertures are configured to receive fasteners configured to secure the torque limiter to the driven sprocket in a manner such that rotation of the driven sprocket results in rotation of the torque limiter.

A pulley is disclosed. The disclosure provides a pulley. The pulley is made up of a frame and a wheel. The frame includes a first and second plate spaced apart from each other. The wheel is rotatably connected between the first and second plate. The first and second plate each include an extended portion extending in a common direction beyond the radius of the wheel. The extended portion of the first and second plate each include a ramp for guiding a line onto the wheel. Also disclosed is a method for making the pulley.

A vehicle has an internal combustion engine, an accessory, and a system having first and second belts extending between a drive assembly rotatably connected to a crankshaft of the engine and a driven assembly rotatably connected to a driveshaft of the accessory. One of the drive and driven assemblies comprises a mechanism with a shaft supporting first and second pulleys, with the first and second pulleys associated with the first and second belts, respectively. The first pulley is selectively engaged with the shaft in response to an engine speed being below a threshold value, and the second pulley is selectively engaged with the shaft in response to the engine speed being above the threshold value.

In an elevator installation a belt-like support is guided over a roller. The roller includes at least one restraining element, which is arranged laterally of a roller contact surface. Lateral jumping-off of the belt-like support from the roller is thereby prevented. The restraining element additionally has a guide surface inclined toward the roller contact surface.

A V-belt pulley includes a plurality of rib guides projected along a circumferential surface of the V-belt pulley; and an alignment corrector that moves a V-belt in a direction towards an inside of the V-belt pulley when a rib of the V-belt is positioned outside of an outermost rib guide of the plurality of rib guides.

This disclosure relates to methods and apparatuses of employing belts for an angular drive. A twisted geometry is applied to a first free span of the belt. A sheave supports the first free span of the belt at a first extremity of the first free span and sheave is at least one of positioning and orienting the rotating sheave or the driven sheave so as to misalign a geometric centerline of the first free span of belt at a given fleet angle with respect to a second extremity of the first free span.

A driven sprocket configured for rotational use in a linear actuator is provided. The driven sprocket includes an outer circumferential surface extending radially from a main body. The outer circumferential surface has a plurality of spaced apart gear teeth configured to engage corresponding structures of a drive belt. An upper rim and a lower rim bound the outer circumferential surface and are configured to maintain a drive belt in an engaged position with the gear teeth. A plurality of internal apertures extend therethrough and are configured to receive portions of a lead screw and portions of a torque limiter. A plurality of spaced apart apertures are configured to receive fasteners configured to secure the torque limiter to the driven sprocket in a manner such that rotation of the driven sprocket results in rotation of the torque limiter.