A transmission 20 includes gears 421 through 426 and 441 through 446, sliders 451 through 453, an electric motor 58, a shift drum 50, shift forks 491 through 493, and a control unit 83. The sliders 451 through 453 are members different from the gears 421 through 426 and 441 through 446. The shift drum 50 includes guide grooves 61 through 63 each including a linear portion 64 and a tilt portion 65. An end of each of the shift forks 491 through 493 is located in a corresponding one of the guide grooves 61 through 63. The control unit 83 controls the electric motor 58 to rotate the shift drum 50 in such a manner that a gear-shift rotation angle is less than 60 degrees. With rotation of the shift drum 50 by the gear-shift rotation angle, the shift forks 491 through 493 move the sliders 451 through 453 in the axial direction of the shaft 21 or 22. In this manner, dog portions of the sliders 451 through 453 mesh with dog portions of the gears 441 through 446 so that rotation of the shaft 21 is transferred to the shaft 22.

The invention is based on an antifriction bearing, in particular an angular ball bearing, comprising two bearing rings (12a-e, 14a-e) and a plurality of rolling elements (16a-e), which are arranged between the bearing rings (12a-e, 14a-e) and held by means of a bearing cage (18a-e), and comprising at least one sensor unit (20a-e), which includes at least one sensor (22a-e) provided at least for the detection of vibrations within the antifiction bearing (10a-e). It is provided that said at least one sensor (22a-e) is arranged in the region of a contact angle (24a-e) within one of the bearing rings (12a-e, 14a-e).

Incongruity sense of a driver due to dog clunking noise can be reduced with reduction of dog clunking noise. A fifth-speed driving gear (425) and a sixth-speed driving gear (426) are arranged on a driving shaft (41) along an axial direction. A first slider (451) is disposed to be movable in the axial direction between the fifth-speed driving gear (425) and the sixth-speed driving gear (426). The first slider (451) is not rotatable on the driving shaft (41). In the axial direction, the sum of the widths of the fifth-speed driving gear (425) and the sixth-speed driving gear (426) is smaller than the maximum width of the first slider (451).

A turbocharger for an engine includes a housing, a shaft, a turbine wheel mounted to the shaft for rotation therewith, a compressor wheel mounted to the shaft for rotation therewith, and a bearing cartridge rotatably supporting the shaft relative to the housing. The housing is positioned axially between the turbine and compressor wheels. The bearing cartridge includes an inner ring mounted to the shaft, an outer ring disposed between the inner ring and the housing and movable relative to the housing, and a first and a second plurality of roller elements axially spaced apart from one another and disposed radially between the inner and outer rings to rotatably support the inner ring relative to the outer ring. A radial gap (RD) is defined between the outer ring (134) and the housing (126). Lubricant flows into the radial gap and radially separates the outer ring from the housing during operation of the turbocharger.

Method of operating an apparatus for analyzing the condition of a machine part rotating with a speed of rotation, includes: receiving a first digital signal dependent on mechanical vibrations emanating from the rotating part; analyzing the first digital signal to detect peak amplitude values during a finite time period corresponding to a predetermined amount of revolution of the rotatable part; the predetermined amount of revolution corresponding to at least one revolution of the monitored rotatable part; defining a plurality of amplitude ranges, each amplitude range corresponding to a peak occurrence frequency of more than one peak per revolution; sorting the detected peak amplitude values into corresponding amplitude ranges to reflect occurrence of detected peak amplitude values within the plurality of amplitude ranges; establishing a peak amplitude value for detected peaks having an occurrence frequency of about N.sub.L peaks per revolution, the occurrence frequency N.sub.L being a number higher than one.

A device for monitoring operation parameters of a vehicle axle including a measuring instrument (1) comprising at least a position sensor, a device (2) for communication of measured quantities to an external device, a mechanism (5) for conversion of mechanical energy of the axle to electrical energy and a memory (3) with a stored identification code. A device has the shape of a ring (4) that is applied on the vehicle axle in such a way that it encircles it. The ring (4) consists of at least two parts (4a, 4b) that are adapted for permanent connection around the vehicle axle. The mechanism (5) consists of a circumferential cavity (5a) in the inner part of the ring where a permanent magnet (5b) is freely positioned, at least one coil (5c), preferably four coils (5c) being positioned along its perimeter. The device (2) for communication of measured quantities is a wireless transmitter with a GSM interface or radio-frequency interface configured for communication of measured values together with the identification code (3) of the axle to an external processing unit.

An abnormality diagnosis method of a rolling bearing used in rotating machinery includes: a time acquisition step of acquiring, from an output signal detected by a sensor during the rotation of the rolling bearing, an entry time when a rolling element enters a flaking region of a bearing ring, and an escape time when the rolling element escapes from the flaking region of the bearing ring; and an estimation step of estimating a flaking size based on a flaking passage time, which is a time difference between the entry time and the escape time. When the bearing ring receives repeated load from the rolling element, the progress of the flaking occurring in the bearing ring can be quantitatively evaluated.

A bearing, such as a plain bearing or a rolling bearing, including at least one coating on at least one surface of at least one element of the bearing, the at least one coating including at least one sensor that is integrated into the coating, the sensor being a nanosensor that includes at least one nanoparticle.

An abnormality diagnosis device according to the present invention detects damage to a bearing device based on vibration data on acceleration of the bearing device. The abnormality diagnosis device includes a first filter, a second filter, and a diagnosis unit. The first filter is configured to extract a first vibration waveform belonging to a frequency band from the vibration data. The second filter is configured to extract a second vibration waveform belonging to a second frequency band higher than the first frequency band from the vibration data. The diagnosis unit is configured to diagnose that there is damage to the bearing device when an evaluation value calculated by dividing a first amplitude of the vibration waveform by a second amplitude of a second vibration waveform at a time at which the first amplitude has occurred exceeds a determination value, the first amplitude exceeding a reference value.

A rotating device according to the present invention includes a motor including an outer shell, a rotating shaft protruding from the outer shell, a first inner bearing supporting the rotating shaft, and a second inner bearing supporting the rotating shaft, a plurality of gears configured to transmit rotation of the motor to an external device, and a casing. A first outer bearing and a second outer bearing are arranged at the casing, and the first outer bearing and the second outer bearing rotatably support portions of the rotating shaft protruding from end surfaces at both sides of the outer shell in a longitudinal direction of the rotating shaft.