Abstract: Surveying device (1) for the running parameters of railway contact bearings (2) which is provided with a rotating race (3) and a non-rotating race (4) which are coaxial to a rotation axis (A) of the railway contact bearing (2) itself, the device (1) being provided with a sealing shield (5) which is mounted onto the non-rotating race (4); and which is also provided with a sealing lining/covering (7) which is integral with the shield (5), and which is in contact with a sliding surface (11s) which is in turn integral with the rotating race (3): the device also being provided with a signal generating element (15) which is integral with the sliding surfaces (3s) (11s) themselves and which is arranged inside the shield (5); and which is also provided with a sensor (16), which faces the generating element (15) in order to read the signal itself, and which is itself integral with the shield (5) in a position which is outside the railway bearing (2).

Abstract: A bearing unit comprises a radially outer stationary race (1) and a pair of radially inner rotatable half-races (2a, 2b). An intermediate annular chamber (8) is defined between the outer race (1) and the inner half-races. The intermediate chamber communicates with the outside through first air passages (5) formed in the outer race and with the inside of the bearing unit through second radial air passages (6) defined between the inner half-races. The second passages (6) are defined by an intermediate annular member (10) which is axially interposed between the inner half-races (2a, 2b) and forms one or more blade surfaces (12a, 12b) extending from the second passage (6) to the intermediate chamber (8) for capturing air from the intermediate chamber and conveying it into the second passage.

Abstract: Sensor-holding lid for a wheel hub bearing, the lid presenting a base wall which is externally delimited by a peripheral border, an axial ledge which is integral to the wall and which is provided with a passing hold for housing the sensor, and a cylindrical wall which is transverse to the base wall and which is arranged radially inside the peripheral wall in order to be fixed onto an external border of the bearing; at least two annular static sealing elements which are made of rubber and which are co-molded, respectively, into the peripheral border on the outside of the cylindrical wall and inside an entry border of the passing hole.

Abstract: Sealing device for a rolling contact bearing (2) provide with a first shield (5) and second shield (7) which a re made of metal material and which are respectively coupled to an outer race (4) and an inner race (3) of the rolling contact bearing (2) itself, and a seal (10) which is made of synthetic material and which is integral to the first shield (5) and which presents a sealing lip (11) which is arranged substantially in contact with the second shield (7); the first shield (5) is defined by a cylindrical portion (15) which is assembled on the outer race (4), and the seal (10) is anchored to the cylindrical portion (15) in order to freely extend from and overhand the cylindrical portion (15) itself and presents, in axial section, a tapering shape towards a cylindrical sliding surface (13) of the second shield (7).

Abstract: A bearing unit comprises a radially outer stationary race (1) and a pair of radially inner rotatable half-races (2a, 2b). Au intermediate annular chamber (8) is defined between the outer race (1) and the inner half-races (2a, 2b) The intermediate chamber communicates with the outside through first air passages (5) formed in the outer race (1) and with the inside of the bearing unit through second radial air passages (6) defined between the inner half-races (2a, 2b). An intermediate annular member (10) is axially interposed between the inner half-races (2a, 2b) and defines the second passages (6).

Abstract: Locking device (1) (101) for a bearing (2) in a wheel hub (3) which is provided with a cylindrical seat (4) for the bearing (2) itself and an annular groove (5) which is obtained in the axial end of the cylindrical seat (4), the locking device (1) (101) presenting a fixing element (10) which is driven onto an outer race (8) of the bearing (2); a blocking element (11) which is arranged inside the annular groove (5); and a connecting element (12) which is used to connect the fixing element (10) and the blocking element (11) to each other and which is provided with a support resiliently yieldable at least in a radial direction and which is suitable for co-operating with the blocking element (11) itself in order to permit the introduction of the blocking element (11) into the annular groove (5) of the wheel hub (3).

Abstract: A screw actuator comprises a housing (1), a screw mechanism (4) with a nut (6) and a screw (5), as well as a motor (7) which is drivingly connected to the screw. The screw (6) is rotatably and translatably supported with respect to the nut (5), which is fixed with respect to the housing (1). The screw engages a translatable, non rotatable actuating head (29) through a swivel connection. The swivel connection comprises a pair of conformed surfaces (41, 42) having a common rotational axis of symmetry which is aligned with the axis of the screw mechanism.

Abstract: The device (B) comprises a first non-rotatable ring (11) to be mounted adjacent to a non-rotatable race (1) of a bearing unit (A), and a second rotatable ring (12) to be coupled fast for rotation with a rotatable race (2,3) of the bearing unit (A). A first air passage (13, 113) is formed through the first non-rotatable ring (11) and a second air passage (14) is formed through the second rotatable ring (12). A sealing device (15, 16) interposed between the first (11) and the second (12) ring, defines an intermediate chamber (17) communicating with the first (13, 113) and the second (14) air passages.

Abstract: A cold rolling method and apparatus for forming an annular workpiece (10) with an outer surface (11) having a given contour and an inner surface (12) having a given contour, starting from an annular blank. A rotatable forming mandrel (21) has a working surface (21a) with a contour corresponding to that of inner surface (12) to be formed. A forming die (51) has a cavity (52) with an inner working surface (53) in form of a surface of revolution corresponding to the outer surface (11) to be formed.

Abstract: In a hub-bearing assembly for the wheel of a motor vehicle, the hub (1) forms integrally or is fixedly secured to a radial flange (7) fixable to a wheel (8). Associated with the assembly is a measuring device (14) mounted to a non-rotating part (12) of the vehicle and operatively facing a radial surface (13) integral with the flange (7). The measuring device (14) detects in real time variations of the axial position of the surface (13) caused by elastic deformation of the flange (7) provoked by forces transmitted from the wheel (8) to the hub flange (7).

Abstract: A hollow suspension standard (20) of a vehicle equipped with a system for supplying pressurized air to a tire through the hub of the wheel has an inner cavity (22) and a seat (21) for housing a wheel hub bearing unit (10). The standard (20) forms a first passage (23) for establishing fluid communication between the inner cavity (22) and the hub-bearing unit (10), and a second passage (24) establishing fluid communication between the inner cavity (22) and a source of pressurized air mounted on board of the vehicle.

Abstract: Protection device (1) for an encoder (2) in a rolling bearing (3) presenting an outer race (5) which is arranged in contact against a fixed support (6), the device being interposed between the encoder (2) itself and a reading sensor (17) which is supported by the support (6) itself, and being provided with: a fixing race (18) which is shrink fit onto the outer race (5) of the bearing (3) and frontally to a shoulder (15) of the support (6); a protection shield (19) which extends from the fixing race (18) towards an inner race (4) of the bearing (3) in a position which is frontal to both the encoder (2) and the sensor (17); and a sealing element (30), which is integral to the fixing race (18) and the shoulder (15) for the static waterproofing of the support (6).

Abstract: A bearing unit comprises an outer stationary race (1) with a first inner passage (6) for the air, and two axially adjacent inner half-races (2a, 2b) rotatable with the hub of a wheel. Formed between the inner half-races are essentially radial second inner air passages (7, 71, 72). These passages have surfaces (71d, 72d) inclined forwardly with respect to a direction of rotation (A, B) so as to favor the air flow through the rotating part of the bearing.

Abstract: Sealing device (1) with a sensor for a rolling bearing (2), in which the sealing shield (7) is mounted between two races of the rolling bearing (2), and a encoder wheel (8) is arranged inside the rolling bearing (2) between the two races and the shield (7); a detecting (9) sensor being arranged inside a housing (10) which is obtained through the shield (7) and which is also arranged with a respective detecting surface which directly faces the encoder wheel (8).

Abstract: A hub-bearing unit for a motor vehicle wheel comprises a bearing housed in a central axial cylindrical seat of a radially outer annular hub adapted for connection to the wheel of a vehicle. The bearing has an rotating ring the axial width of which is greater than that of the cylindrical seat. The outer ring comprises at least one tubular projection extending axially from one side of the outer ring. The tubular projection comprises an end portion projecting beyond a side surface of the hub and cold deformed in a radially outer direction towards said side surface, so as to lock the outer ring on the hub.

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 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: Sealing device (1) for a rolling bearing (2) including: an inner race (5), which is axially blocked by a blocking element (4) suitable for being arranged in contact with a reference element (6); a distance ring (8) which is made of plastic material and which is interposed between the blocking element (4) and the reference element (6); a snap fastening element (9) which is integral to the distance ring (8) in order to fasten the distance ring (8) itself to the blocking element (4); and an external covering (10) made of rubber material and arranged outside the snap fastening element (9) in order to guarantee at least one static seal between the inner race (5) and the blocking means (4) and between the blocking means (4) and the reference element (6).

Abstract: Sealing device (1) for a rolling contact bearing (2) presenting an annular sealing lining (5), a protective shield (6) for the lining (5) which is mounted on the outside of the lining (5) itself, and an encoder (15) which is integral to the shield (6) and which is protected by a covering element (16) arranged opposite the shield (6) in relation to the encoder (15).

Abstract: For the purpose of facilitating correct fitting of a motor vehicle wheel onto a hub (10) which froms a central axial tubular projection (11) for insertion into a central wheel hole (30), a hub assembly includes an annular cylindrical element (20) to be fitted on the projection (11) and having a plurality of circumferentially spaced resilient portions (21) capable of exerting force in radially outward directions on the wheel hole to support the wheel resiliently in an essentially centered manner relative to the hub.