Abstract: A wheel (1) of a railway vehicle is associated with a vibration sensor (3) for supplying a vibration impulsive signal (V), indicative of the vibration of the wheel, to an electronic processing unit (E). This generates, based on the vibration signal (V), an impulsive surveillance signal (S) the instant value of which is increased in a manner correlated to the amplitude of each vibration impulse (I) and decreased in accordance with a predetermined law after each vibration impulse. The processing unit (E) compares the instant value of the surveillance signal (S) with a reference threshold value (T) and automatically generates an alarm signal (A) when the instant value of the surveillance signal (S) reaches or exceeds the reference threshold value (T).

Abstract: A clutch actuator unit comprises a housing (8, 9), a screw mechanism and an actuator head which at one end engages the screw mechanism (1, 2) and at the other end has an actuating end (18), which actuator head (16) can be displaced in axial direction by the screw mechanism upon driving the screw mechanism. The actuating end (18) of the actuator head (16) is displaceable in transverse direction with respect to the screw mechanism as well.

Abstract: A bearing unit for a vehicle wheel hub is associated with a rotation sensing device and an electromagnetic inductive coupling. The rotation sensing device comprises an impulse ring (18) secured for rotation with the rotatable race (13) of the bearing unit by means of a rotatable annular carrier (19), and a magnetic/electric transducer (20) mounted to the stationary race (12) of the bearing unit by means of a stationary annular carrier (21) and operatively facing the impulse ring (18). The electromagnetic inductive coupling comprises a stationary coil (24) electrically connectable to a power supply (32) and carried by the stationary annular carrier (21), and a rotatable coil (25) electrically connectable (26) to an electric or electronic device mounted on the wheel. The rotatable coil (25) is carried by the rotatable annular carrier (19) and is electromagnetically linked to the stationary coil (24).

Abstract: Sensor assembly for measuring a load on a bearing having at least one bearing ring (11), the at least one bearing being provided with a cavity (12) for holding the sensor assembly. The sensor assembly comprises a series mounting between opposing sides (17, 18) of the cavity (12), the series mounting comprising a piezoelectric plate (16) and a spring (19) with spring stiffness k. Alternatively, the sensor assembly further comprises a body (14) with mass in mounted between the piezoelectric plate (16) and the spring (13), to allow simultaneous load measurement and health monitoring.

Abstract: Method for the production of a part of a rolling bearing, such as a ring for a ball bearing. The starting material used is a grade of steel containing 0.90 1.00% C; at most 0.15% Si; 0.25-0.45% Mn; at most 0.0015% P; at most 0.010% S; 1.30-1.50% Cr; at most 0.15% Ni; 0.20-0.23% Mo; at most 0.20-0.23% Cu; at most 20 ppm Ti; at most 8 ppm O. Before subjecting this grade of steel to a quenching and tempering treatment, the shaped item is subjected to plastic deformation in the hot or cold state. The mechanical properties and in particular the anticipated life under severe stress improve as a result.

Abstract: A continuously variable transmission system comprises a continuously variable transmission having two pulley sets each with two discs defining a V-shaped groove, drive means-for varying the width of said groove and a belt extending between said-pulley sets in the grooves thereof, as well as a forward-reverse control connected to the shaft of one of the pulley sets and a clutch connected to said forward-reverse control, said pulley sets, forward-reverse control and clutch each being provided with a respective actuator. The actuators of the forward-reverse control and of the clutch are of an electromechanical type.

Abstract: An actuator comprises a housing (8) which contains a screw mechanism (9) and a motor (10) which is drivably connected to the screw mechanism (9), said screw mechanism providing a linear movement in response to a rotational movement of the motor, and comprising a screw (12) and a nut (13) one of which is supported rotatably with respect to the housing (8). The linearly displaceable member of the screw mechanism is drivingly connected to a pump mechanism for providing a flow of medium.

Abstract: A grease lubricated bearing housing is provided with an opening receiving a shaft and has a housing wall arranged to form a seat for the outer race ring of a bearing, with a space on each axial side of the seat that being limited by an axially extending wall portion and a radial gable wall. The wall of the housing is provided with a through bore for receiving a grease nipple, with the bore opening into the interior of the housing in at least one of the two spaces axially outside the bearing seat. The interior of the housing wall is provided with a material conglomeration positioned relative to the through bore so that the material conglomeration forms a shield urging grease introduced through the through bore to move primarily towards the bearing seat while also preventing grease from primarily filling out the space into which the through bore opens.

Abstract: The invention concerns an instrumented antifriction bearing device, provided with a non-rotating part including a non-rotating ring and sensor element, a rotating part including a rotating ring and encoder, and at least a row of rolling bodies arranged between two raceways of the non-rotating and the rotating rings. The non-rotating sensing element and the rotating encoder form an assembly detecting rotation parameters. The device includes a maintenance device for temporarily maintaining the angular indexing of the encoder relative to the sensing element in an angular position, wherein the encoder generates in the sensing element a reference signal. The maintenance device temporarily maintains the angular indexing device in position until released, as for example, by the axial displacement of at least part of an element of the device towards the row of rolling bodies.

Abstract: A wheel assembly includes a hub and bearing unit in which an annular hub has an axial cylindrical seat with an outer ring of a bearing fitted thereto with radial interference. The ring is locked axially on the hub between a pair of annular rims which project radially outwardly from the outer cylindrical surface of the ring and have been cold-deformed so as to engage two opposite surfaces of the hub. The hub also has an outer radial flange for fixing a brake rotor which in turn has an inner radial flange arranged substantially in the same plane as the flange. The brake rotor is locked axially on the hub by at least one cold-deformed annular rim which projects radially outwardly from the flange on the hub so as to engage a respective one of two radial surfaces of the flange.

Abstract: A bearing arrangement is provided with an area to be supplied with lubricant from a lubricant reservoir via a lubricant line. The lubricant reservoir has a number of individual reservoirs in which a portioned amount of lubricant is contained with closure to the lubricant line. A mechanism is provided for allowing the closure to the lubricant line to be optionally cleared.

Abstract: A suspension thrust bearing including a first race, a second race, a row of rolling bodies disposed between the two races, a first cap 13 in contact with the first race, and a first cup 4 in contact with the first cap 13. The first cap 13 includes integral axial retention means for retaining the first cup 4.

Abstract: A screw actuator which has a housing, a motor, an actuating member and a screw mechanism which provides a linear movement of the actuating member with respect to the housing in response to a rotational movement of the motor. The screw mechanism has a screw and a nut engaging each other by rolling elements, one of the screw or the nut is rotatbly supported with respect to the housing, and a reduction gear means. The nut is fixed with repect to the housing, and the screw is rotatably supported with respect to the housing by mean of rolling elements.

Abstract: Sealing device (1) for a wheel hub group (2) connected to the differential (3) of a vehicle, and provided with a rolling bearing (9), the sealing device (1) being mounted in such a way as to protect the bearing (9) from a lubricating fluid for the lubrication of the differential (3), and presenting a first shield (22) which is integral with an outer race (10) of the bearing (9), a second shield (23) which is arranged inside the first shield (22) and which is integral with an inner race (11) of the bearing (9) and which faces the first shield (22) itself, and a dynamic sealing element (24) which is interposed between the first and second shields (22, 23); the second shield (23) being defined by a support portion (25) made of metallic material and force fit onto the inner race (11) and a cylindrical encoder (27) which is integral with the support portion (25), and the first shield (22) being made of metallic material lined with rubber material, and being provided with a loophole (38) which is suitable for being

Abstract: A device for detecting one or more parameters of a rotary member angular displacement, includes: and instrumented roller bearing (1) provided with a non-rotating part including a non-rotating ring (2) and a sensor block (8), a rotating part including a rotating ring (2) and a coding ring (15) mounted opposite the sensor block (8) and at least a row of rolling elements (4); and elements for processing signals transmitted by the sensor block. The sensor block (8) comprises at least two sensing elements (9, 10) co-operating with the single coding ring, signals transmitted independently by each sensing element corresponding to the same parameter of angular displacement, so as to supply to the processing elements a redundant information on the parameter of angular displacement.

Abstract: A linear bearing includes a linear guide on which a carriage is translationally movable, a plurality of balls between the linear guide and carriage located in a contact area between the linear guide and the carriage on a straight line, ball deflection sections each adjoining one end of the line outside the contact area, and a ball return section, with the balls being adapted to continuously revolve along the line between the linear guide and the carriage, the ball deflection sections and the ball return section. The ball deflection sections include an end part and a ball deflector. The end part is provided with a trough-shaped depression which guides the balls, while the ball deflector includes a hemispherical or hemi-ellipsoidal section. Also, a deflection path for the balls is provided between the trough-shaped depression and the hemispherical or hemi-ellipsoidal section in a mounted state of the linear bearing.

Abstract: The present invention refers to a bearing and lubricant combination for use as a supporting system for a rotating shaft in a smoke and heat exhaust ventilation system and having properties permitting it to fulfill the requirement to withstand an emergency temperature of 600° C. for at least 60 minutes, with a stand-still of 2 minutes after 15 minutes exposure to the emergency temperature, wherein the bearing is a martensitic stainless bearing (rings) with a steel cage; and which bearing is lubricated with an electric motor grease with a base oil viscosity in the region of 50-200 cSt at 40° C.

Abstract: A plain bearing bush possesses a hollow cylindrical shape and includes a first hollow cylindrical part of a first material and a second hollow cylindrical part of a second material, with the second hollow cylindrical part being coaxially surrounded by the first hollow cylindrical part. One of the first and second materials is a plain bearing material and the other of the first and second materials is a high-strength material. A plurality of through holes penetrate both the first hollow cylindrical part and the second hollow cylindrical part, with the through holes each having an axis arranged perpendicular to the longitudinal axis of the hollow cylindrical shape.

Abstract: A system and method for analyzing vibrations signals thereby identifying damage or original manufacture defects in a vibrating device. In one embodiment of the invention, the method comprises collecting vibration signal data from at least one vibrating device, wherein the vibrating device includes at least an rotating inner ring, a rotating outer ring, and a plurality of rotating elements. The vibration signal data is enveloped and converted into a frequency domain signal. The amplitude of the frequency domain signal at certain defect frequencies is divided by a noise floor to provide a damage index. If the damage index exceeds an adjustable user-defined threshold, a warning is generated so as to alert a user of damage or original manufacture defects in the vibrating device.

Abstract: A device for protecting the bearing of an electrical machine against the damaging passage of current, wherein the electrical machine comprises a stator and a rotor pivotally mounted relative to the stator by the bearing. The device is provided with a compensation circuit which produces a compensation current which compensates for a parasitic current formed during operation of the electrical machine by the bearing and a coupling element for directly or indirectly coupling the compensation current into the bearing.