Tensioner for a belt drive (1), including a rigid element (12) rotatably connected around a first axis (B) and a couple of idle pulleys (17, 18) supported by a rigid element (12) on opposing parts of axis (B) and adapted to cooperate with respective sections (31, 32) of a belt (30) of belt drive (1) The tensioner (2) also includes a mobile element (25) hinged to a second fixed axis (A) carrying the first axis (B)

Tensioner for a drive belt of a motor vehicle

In an aspect, a tensioner is provided for tensioning an endless drive member that is engaged with a rotary drive member on a shaft of a motive device. The tensioner includes a base that is mountable to the motive device, a ring that is rotatably supported by the base in surrounding relationship with the shaft of the motive device and which is rotatable about a ring axis, a tensioner arm pivotally mounted to the ring for pivotal movement about an arm pivot axis, and first and second tensioner pulleys. The first tensioner pulley is rotatably mounted to the tensioner arm. The tensioner arm is biased towards a first span of the endless drive member on one side of the rotary drive member. The second tensioner pulley is rotatably mounted at least indirectly to the ring and is biased towards a second span of the endless drive member on another side of the rotary drive member. The ring is rotatable in response to hub loads in the first and second tensioner pulleys that result from engagement with the first and second spans of the endless drive member.

Orbital tensioner assembly

A tensioner (1) for a belt drive, comprises a base (2) defining an axis (A), a mobile eccentric element (3) hinged about axis (A) and loaded by a spring (5), a pulley (4) idly connected to the mobile element (3). Specifically, the pulley (4) defines a single body with the external ring of a rolling bearing (6) mounted on the mobile element (3) and the spring (5) is helical and presents a square or rectangular cross section.

Pulley tensioner for an oil wet belt drive

In one aspect, a tensioner is provided, comprising, a first tensioner arm and a second tensioner arm, a first wheel and a second wheel. The first tensioner arm is pivotable about a first pivot axis. The second tensioner arm is pivotally connected to the first arm so as to be pivotable about a second pivot axis located at a selected distance from the first pivot axis. The first wheel is rotationally connected to the first tensioner arm about a first rotation axis. The second wheel is rotationally connected to the second tensioner arm about a second rotation axis. The first and second wheels are configured to engage an endless drive member. The first and second wheels are biased in respective first and second free arm directions.

Tensioner and endless drive arrangement

A tensioner (1) for a belt drive comprises a pivot (2) defining an axis (A), a support (4) hinged to the axis (A) and defining a guiding surface (22) preferably having a circular profile, an elastic element (18) for actuating the support (4) and a crown pulley (5) eccentric with respect, to the axis (A) and surrounding the guiding surface (22). The tensioner (1) further comprises a journal bearing (4, 28, 31, 32) to support the pulley (5) on the guiding surface (22).

Pulley tensioner for a belt drive for use in contact with oil

Described herein is a tensioner (2) for a belt (10) of a drive (1) of a motor vehicle, comprising: at least two idle pulleys (15, 16) designed to co-operate with respective belt runs (32, 34) of the belt (10); two arms (13, 14) bearing the pulleys (15, 16); and elastic means (17) acting at least indirectly on the arms (13, 14) for tensioning the belt (10), in which the arms (13, 14) are constrained to one another, and at least one of the arms (13, 14) is hinged to a first mobile axis (C).

Alberto Ruffini

Papers

Tensioner for a drive belt of a motor vehicle

A two-armed tensioner for the drive belt of a motor vehicle