Abstract: A mechanical system with a one-way clutch, such as a motor vehicle alternator pulley, includes an outer first ring and an inner second ring able to move relative to one another in rotation about a central axis and delimit between them, radially with respect to this central axis, an annular housing. The mechanical system includes a free-wheel mechanism having members arranged in the annular housing, and at least one rolling bearing providing rollers arranged in the annular housing. The first and second rings are common to the free-wheel mechanism and to the rolling bearing. The members of the free-wheel mechanism are cams in contact with a first race formed by the first ring and a second race formed by the second ring. The first and second races are circular, centered on the axis of rotation and have no ramp.

Abstract: The present invention relates to a mechanical system with a one-way clutch, for example a pulley for a motor vehicle alternator, comprising a first element and a second element which are able to move one with respect to the other in rotation about a central axis and delimit an annular housing radially to the central axis, a one-way clutch device arranged in the annular housing, and at least one rolling bearing arranged in the annular housing. The mechanical system is characterized in that the rolling bearing is an angular-contact bearing and comprises at least one pressed ring comprising means of attachment of the rolling bearing to the first element or the second element. The invention also relates to an alternator comprising such a mechanical system configured as a pulley with a one-way clutch.

Abstract: In a method for fitting a preassembled pulley subassembly (1) on a rotary machine (2), the preassembled subassembly comprising a pulley (7), a rolling bearing (8), a plate (9) and an elastic ring (23) positioned around a shoulder (9a) of the plate (9), the following steps are carried out:—the bearing (8) is mounted on a hollow shaft (10) of the rotary machine (2) and, at the same time, a hub (20) of the plate (9) is mounted on a rotary spindle (4) of the rotary machine (2), that passes through the hollow shaft (10),—the elastic ring (23) of the plate (9) is slid axially until it enters a groove (10a) in the hollow shaft (10) of the rotary machine.

Abstract: The inventive pulley device for one of a chain and belt provides an inner ring, an outer ring, at least one row of rolling elements mounted in a rolling chamber defined between the inner ring and the outer ring, a pulley secured in rotation with the outer ring and provided with an outer radial surface for engagement with one of a chain and a belt. A screw for mounting on a support is housed radially inside the inner ring and a mounting support element is provided with a passage opening for the screw. The opening is tapped, with a complementary tapping of a thread arranged on the screw, the screw is provided with a groove, offset relative to the thread along a longitudinal axis (X40) of the screw and in which the tapping of the opening is received.

Abstract: The invention relates to a one-way clutch mechanical system, in particular a pulley-assembly for a motor vehicle alternator. The one-way clutch mechanical system includes an inner element and an outer element, which are movable relative to one another in rotation around a central axis (X1) and delimits an annular housing between them. The system further includes a one-way clutch device positioned in the annular housing, a member for damping a relative rotational movement between the inner and outer elements and for transmitting torque to the one-way clutch device, which is also positioned in that annular housing. The damping and torque transmission member is axially offset relative to the one-way clutch device, along the central axis (X1).

Abstract: Ball screw assembly comprising a screw (2) provided with an outer thread (3); a nut (4) provided with an inner thread (5); a series (6) of balls (7) able to circulate along a circulating path (10) between the screw and the nut, along which the balls are engaged in the threads thereof; and recirculating means (8) defining a recirculating channel (9) to carry balls from one end to the other end of said circulating path (10); The recirculating channel (9) comprising a return channel (14) provided on the nut and, between the ends of this return channel and the corresponding ends of said circulating path, deflecting channels (27, 28) which are defined respectively between surfaces (25) of deflecting elements (20, 21) engaged in respective holes (11, 12) of the nut (4) and local zones (26) of surfaces (16) of these respective holes.

Abstract: The wear-compensation device for a gear comprises a fixed support capable of being fixed axially on an external element in order to keep the device on the said external element, a bearing designed to be mounted on a shaft comprising one of the wheels of the gear, an eccentric mounted on the bearing and designed to be in contact with the external element, the said eccentric being able to move angularly relative to the fixed support. The device also comprises a torsion spring mounted axially between the fixed support and the eccentric and capable of exerting a circumferential preload force on the said eccentric, the said spring comprising a first end mounted inside a recess of the eccentric and a second end interacting with the fixed support.

Abstract: The present invention relates to a tensioning device having a mounting plate; a tensioning roller centered on a roller axis and mounted movably on the plate, with at least one degree of rotational freedom around a pivot axis that is off-centered relative to the roller axis between at least one initial configuration, a mounting configuration and a final configuration for tensioning the traction member positioned on the tensioning roller. The device includes means for locking the tensioning roller relative to the mounting plate in the different configurations of the tensioning device. The tensioning device has at least partially removable means for indexing the position of the tensioning roller relative to the mounting plate in the final configuration. The invention also relates to an engine equipped with at least one traction member and at least one tensioning device. The invention also relates to a method for implementing such a tensioning device.

Abstract: The present invention provides a system for driving a water pump. The system includes a driveshaft, a case containing the water pump, a bearing including a stationary ring that is stationary relative to the case and a rotating ring secured in rotation with the driveshaft. The system further includes a drive belt, at least one rolling path for the drive belt, the rolling path being secured in rotation with the rotating ring, and a flange transmitting the torque from the rotating ring to the drive shaft. The flange is made from plastic and is overmolded both on the rotating ring and on the driveshaft. The invention also relates to a mounting method for such a system.

Abstract: A method of providing a rolling bearing having a rolling bearing axis configured for a tensioning roller is provided. The method includes providing an inner race having an axial portion and an outer race mounted around the inner race to rotate therearound. The axial portion extends axially beyond the outer race, the inner race having an open-ended bore in the axial portion, the open-ended bore not being threaded, the open-ended bore oriented perpendicularly to the axis. The method includes providing at least one row of rolling elements placed between the inner race and the outer race and applying a surface treatment on at least the axial portion of the inner race. After applying the surface treatment, positioning an insert having a threaded portion in the open-ended bore, the insert configured to receive and engage a threaded rod, the threaded portion not including the surface treatment located on the inner race.

Abstract: The device for torque transmission between a drive pulley (1) and a shaft (2) comprises a coupling flange (4) rotationally driven by the pulley and a hub fitted at the shaft end and rotationally joined to the shaft, with torque limitation means fitted between the coupling flange (4) and the hub (3), characterized in that the torque limitation means comprise a friction ring (28) comprising a plurality of projecting elastic portions in friction contact with a surface of the coupling flange (4) and/or of the hub (3).

Abstract: This mechanical system with one-way clutch, such as a motor vehicle alternator pulley, provides an outer first ring and an inner second ring able to move relative to one another in rotation about a central axis and delimit between them, radially with respect to this central axis, an annular housing. A free-wheel mechanism having members arranged in the annular housing. At least one rolling bearing providing rollers arranged in the annular housing. The first and second rings are common to the free-wheel mechanism and to the rolling bearing. The members of the free-wheel mechanism are cams in contact with a first race formed by the first ring and a second race formed by the second ring. The first and second races are circular, centred on the axis of rotation and have no ramp. An alternator may comprise such a mechanical system configured as a pulley with a one-way clutch.

Abstract: The present invention relates to a mechanical system with a one-way clutch, for example a pulley for a motor vehicle alternator, comprising a first element and a second element which are able to move one with respect to the other in rotation about a central axis and delimit an annular housing radially to the central axis, a one-way clutch device arranged in the annular housing, and at least one rolling bearing arranged in the annular housing. The mechanical system is characterized in that the rolling bearing is an angular-contact bearing and comprises at least one pressed ring comprising means of attachment of the rolling bearing to the first element or the second element. The invention also relates to an alternator comprising such a mechanical system configured as a pulley with a one-way clutch.

Abstract: The present invention relates to a mechanical system with a one-way clutch, for example a pulley for a motor vehicle alternator, comprising a first element and a second element which are able to move one with respect to the other in rotation about a central axis and delimit an annular housing radially to the central axis, a one-way clutch device arranged in the annular housing, and at least one rolling bearing arranged in the annular housing. The mechanical system is characterized in that the rolling bearing is an angular-contact bearing and comprises at least one pressed ring comprising means of attachment of the rolling bearing to the first element or the second element. The invention also relates to an alternator comprising such a mechanical system configured as a pulley with a one-way clutch.

Abstract: The present invention relates to a mechanical system with a one-way clutch, for example a pulley for a motor vehicle alternator, comprising a first element and a second element which are able to move one with respect to the other in rotation about a central axis and delimit an annular housing radially to the central axis, a one-way clutch device arranged in the annular housing, and at least one rolling bearing arranged in the annular housing. The mechanical system is characterized in that the rolling bearing comprises at least one pressed ring distinct from the constituent elements of the one-way clutch device. The invention also relates to an alternator comprising such a mechanical system configured as a pulley with a one-way clutch.

Abstract: A tension roller or tensioner for a belt drive of an internal combustion engine comprises a pulley (10); at least one rolling bearing (18) comprising an inner race (20) and an outer race (22), the bearing being mounted in the pulley (10); a spacer (12) having a central bore (14) and a shoulder (16) supporting the inner race (20) radially and axially; a screw (24) arranged in the central bore (14) of the spacer (12); an elastic cup (26) for securing the screw (24) in the central bore (14) of the spacer (12) during transport; and a means for sealing the rolling bearing (18) during use. It is proposed that the one means for sealing the rolling bearing (18) comprise at least one seal integrated into the rolling bearing (18).

Abstract: The invention relates to a tensioning device comprising a back plate, on which is installed a tensioning roller provided with at least one bearing. The tensioning roller is installed on the back plate with the possibility of rotation about an eccentric axis (X6) in relation to the axis (X4) of the tensioning roller. The tensioning roller is provided with a protuberance engaged in a peripheral recess of the back plate, this peripheral recess limiting the movement of the protuberance between two abutments.

Abstract: An air-conditioning compressor comprises a shaft rotationally assembled through a casing. A pulley is attached to the compressor by a roller bearing. A torque-transmitting member engages the pulley and the shaft together. Openings are formed between arms of an external torque transmitting part and a bore of an inner ring has a radius such to enable insertion of a crimping tool into the torque-transmitting subassembly to reshape local plastic features for assembly of the torque-transmitting subassembly. The local plastic deformations of the casing interfere with a transverse face of the inner ring, wherein the local plastic deformations are positioned in axial alignment with the empty spaces in at least one relative angular position between the torque-transmitting member and the inner ring.

Abstract: Ball screw assembly comprising a screw (2) provided with an outer thread (3); a nut (4) provided with an inner thread (5); a series (6) of balls (7) able to circulate along a circulating path (10) between the screw and the nut, along which the balls are engaged in the threads thereof; and recirculating means (8) defining a recirculating channel (9) to carry balls from one end to the other end of said circulating path (10); The recirculating channel (9) comprising a return channel (14) provided on the nut and, between the ends of this return channel and the corresponding ends of said circulating path, deflecting channels (27, 28) which are defined respectively between surfaces (25) of deflecting elements (20, 21) engaged in respective holes (11, 12) of the nut (4) and local zones (26) of surfaces (16) of these respective holes.

Abstract: The wear-compensation device for a gear comprises a fixed support capable of being fixed axially on an external element in order to keep the device on the said external element, a bearing designed to be mounted on a shaft comprising one of the wheels of the gear, an eccentric mounted on the bearing and designed to be in contact with the external element, the said eccentric being able to move angularly relative to the fixed support. The device also comprises a torsion spring mounted axially between the fixed support and the eccentric and capable of exerting a circumferential preload force on the said eccentric, the said spring comprising a first end mounted inside a recess of the eccentric and a second end interacting with the fixed support.