A belt drive comprises a first pulley and at least one additional pulley and uses an elastic belt that is engagable over the pulleys. An auxiliary unit, connected to the first pulley, has a detent. A tensioning link comprises an open-ended slot for receiving in a slidable manner the detent. In an operating position of the belt drive the detent is locatable at a closed end of the open-ended slot and to obtain a belt changing position the detent is movable along the open-ended slot towards an open end of the open-ended slot. Movement of the detent along the open-ended slot requires simultaneous rotation of the auxiliary unit.

A pulley device for a tensioner roller or winding roller of a transmission element, providing a pulley, and a bearing. The bearing includes a rotating outer ring mounted to the pulley, a fixed inner ring, and at least one row of rolling elements arranged between the rings. The inner ring of the bearing has at least one end portion protruding axially with respect to the outer ring. The pulley is provided with at least one pulley element that is C-shaped in axial section. One of the at least one pulley elements is provided with a lateral portion extending substantially radially to pass into the immediate vicinity of an outer surface of the axially protruding end portion of the inner ring.

A Pulley device for a tensioning or winding roller for a transmission element including a pulley, and a rolling bearing provided with a rotating outer ring, the pulley being mounted on an outer surface of the outer ring, a fixed inner ring, the rings being coaxial and forming a radial space between them, and at least one row of rolling elements arranged in the radial space. The pulley device further includes at least one annular protection flange with a radial body. The flange is fixed to the rotating outer ring by crimping an axially protruding portion of the pulley towards an outer edge of the flange.

A press-fit-interlocking connection of an inner part to an outer part which is fastened to the inner part includes a cylindrical press joint (3) between the outer part and the inner part. The interlocking connection is formed by an axial stop having contacting stop parts (18, 19) on the inner part and on the outer part. The connection has an edge support in contact with the stop parts which contact one another, in a first main plane of curvature (E.sub.1) to which the cylinder axis of the press joint is perpendicular, with equal radii of curvature (r.sub.a1, r.sub.a2), and in a second main plane of curvature (E.sub.2) in which the cylinder axis of the press joint lies, with different radii of curvature (r.sub.a2, r.sub.i2).

An air-cooled heat exchanger includes a plenum having an intake and a discharge, a cooling tube assembly inside the plenum, a fan assembly that has a fan, an engine positioned outside the plenum, and an internal drive assembly. The internal drive assembly is configured to transfer torque from the engine to the fan. The internal drive assembly is contained inside the plenum.

In an embodiment, a tensioning apparatus includes a housing and a fastener extending at least partially through the housing. The apparatus also includes a trolley adjustably positioned within the housing about the fastener. The apparatus also includes a pulley disposed outside the housing and coupled to the trolley, where the pulley moves in unison with the trolley along an opening in the housing.

The invention relates to a belt drive (24) with (a) a first pulley wheel (12) in the form of a drive sprocket with drive teeth (16), (b) a second pulley wheel in the form of an output sprocket (18) and (c) a toothed belt (22) that (i) connects the drive sprocket (12) and the output sprocket (18) for transmitting a force and (ii) has a belt back (38) and (iii) a plurality of teeth (34), wherein a tooth base (36) is situated between two adjacent teeth. According to the invention, (d) the toothed belt (22) comprises a plurality of recesses (26), each of which is configured in a tooth base (36), and (e) at least one pulley wheel features guide projections (28) for engaging in the recesses (26).

A power transmission mechanism includes: a first pulley driven about a first axis; a second pulley rotatable about a second axis, separated from and parallel to the first axis; and a third pulley rotatable about a third axis parallel to the first axis and between the first axis and the second axis. The third pulley is configured such that a large-diameter pulley having a larger diameter than the first pulley and a small-diameter pulley having a smaller diameter than the second pulley are coaxially fixed to each other. A first belt is looped between the first pulley and the large-diameter pulley. A second belt is looped between the small-diameter pulley and the second pulley. The third pulley is supported such that a position is adjustable, along a first plane orthogonal to the third axis, in a direction intersecting a second plane including the first axis and the second axis.

A camera assembly includes a motor configured to generate a driving power; a motor shaft that extends from the motor, such as to define a first axis, and is configured to rotate by the driving power of the motor; a pulley configured to rotate on a second axis, that is spaced from the first axis, according to rotation of the motor shaft; a belt configured to couple the motor shaft and the pulley, and convert the rotation of the motor shaft to rotation of the pulley, and tension of the belt applies a force to the motor shaft in a direction towards the second axis; a camera module configured to be mounted on the pulley and rotate together with the pulley; and an elastic body configured to apply a biasing force to the motor shaft such as to bias the motor shaft in a direction away from the second axis.

A drive transmission device includes a plurality of pulleys including three or more pulleys, and an endless belt stretched over the plurality of pulleys and in which a plurality of linear belt sections each formed between two of the pulleys are formed, wherein a first flange is provided on a first pulley which is the pulley that forms a longest belt section and does not form a shortest belt section among the plurality of belt sections, and a gap between the first flange and a side surface of the endless belt is smaller than a gap between a flange provided on another pulley and the side surface of the endless belt.