A mechanical device includes a housing, a transparent spacer member, a magnet, and an image capturing device. The housing has an internal space in which a machine component immersed in oil is housed. The spacer member is disposed in an opening of the housing. The magnet is supported by the spacer member. The image capturing device captures the internal space of the housing via the spacer member.

A control system for an oil supply mechanism includes an oil pump, a hydraulic pressure sensor, a drive shaft, a pump pulley, a toothed belt, and an output shaft. An electronic control unit included by the control system detects an abnormality of the toothed belt based on a comparison result between an actual value and a theoretical value that are frequencies of pressure pulsations of oil. The actual value is a value calculated based on time fluctuations of a hydraulic pressure detected by the hydraulic pressure sensor. The theoretical value is a value calculated based on a rotational speed of the output shaft and the number of teeth of an inner rotor.

The subject of the invention is a method and an apparatus for identifying the most likely tooth numbers lot all of the gems in a gearbox, on the basis of measured dynamic signals and the total ratio of the gearbox. A method uses a data obtained from a vibration measuring device delivered to a data acquisition device and a data delivered by a user to a computer device. The method has the step of processing data delivered by a user to the computer device, a step of calculating frequencies of characteristic features for each potential tooth combination for the first embodiment of the invention or of calculating frequencies of characteristic features for each potential tooth combination and a potential speed combination for the second embodiment of the invention a step of measuring the vibration signals and an angular displacement signal of the gearbox or only measuring the vibration signals, relative to the embodiments of the invention, a step of calculating a frequency spectrum from the measured data, a step of determining an amplitude of components of the frequency spectrum, a step of determining the tooth numbers in the gearbox by identifying which potential gear tooth combination maximizes the amplitudes of the components of the frequency spec:man at frequencies of characteristic features or of determining the tooth numbers and an improved speed estimate by identifying which potential gear tooth and a potential speed combination maximizes the amplitudes of the components of the frequency spectrum at frequencies of characteristic feature and a step of presenting the tooth numbers in the gearbox in a computer device or presenting the tooth numbers in the gearbox and an improved speed estimate.

A control system for an oil supply mechanism includes an oil pump, a hydraulic pressure sensor, a drive shaft, a pump pulley, a toothed belt, and an output shaft. An electronic control unit included by the control system detects an abnormality of the toothed belt based on a comparison result between an actual value and a theoretical value that are frequencies of pressure pulsations of oil. The actual value is a value calculated based on time fluctuations of a hydraulic pressure detected by the hydraulic pressure sensor. The theoretical value is a value calculated based on a rotational speed of the output shaft and the number of teeth of an inner rotor.

A failsafe bar connection of a screw actuator includes a failsafe bar for transmitting load via a secondary load path, the failsafe bar having a bar-end with a convex thrust surface; and an attachment part for coupling load to an aircraft structure, the attachment part having a socket for retention of the bar-end, the socket providing a concave thrust surface. A contact mechanism is provided to monitor relative displacement of the convex thrust surface within the concave thrust surface in a direction along an axis of the attachment part. In this way, changes in backlash and loading of the secondary load path can be detected. The contact mechanism comprises a protuberance extending from the bar-end along the main rotational axis of the failsafe bar and a displaceable contact surface provided by a displaceable member in the attachment part, the relative position of which is monitored by a displacement sensor.

A transfer case includes a housing, along with an input shaft, a primary output shaft, a secondary output shaft, and a secondary torque transfer mechanism, each disposed at least partially within the housing. The input shaft is configured to couple to the primary output shaft to transfer torque thereto. The secondary torque transfer mechanism includes a rotating member coupled to the secondary output shaft and a locking mechanism. The locking mechanism includes a locking ring, a fork member engaging the locking ring, and a slide shaft coupled to the fork member and configured to slide the locking ring to positively couple the primary output shaft to the rotating member to transfer torque to the secondary output shaft. The housing includes an aperture axially configured to receive an elongated tool configured to be rotated manually external to the housing for engaging and moving the slide shaft to the second position.

Methods and systems for monitoring belt tension and determining belt lifespan in a TRS are disclosed. An embodiment of a self-tensioner can include a sensor connected to a self-tensioner in a belt driven system and a magnet that passes over the sensor to generate a signal. The sensor detects the signal, and the signal in conjunction with an angle of the magnet is converted into a voltage value. The method can include a controller connected to the self-tensioner, the controller converts the voltage value into a tension value, and stores the tension value among a plurality of premeasured tension values in a memory, where the controller compares the tension value and the plurality of premeasured tension values to determine a belt tension condition of the belt in the belt-driven system.

A method for operating a drive train having a power generator, a mechanical power transmission device, and a power receiver wherein the power transmission device is monitored to detect mechanical damage and/or the development of mechanical damage to the power transmission device, wherein detected damage and/or detected damage development is localized and the power generator, the power transmission device, and/or the power receiver are/is controlled such that a mechanical load at the localized damage location and/or damage development location is selectively reduced. A program product including program code sections with which such a method is feasible when the program product is executed on a programmable controller, a computer, or other programmable device.

A ball screw with force sensor in radial direction including a screw rod, a screw nut, a plurality of balls, and a force sensor is provided. The screw nut has a cavity. The cavity is extended along a radial direction from an outer surface of the screw nut. The force sensor is disposed in the cavity of the screw nut, and the force sensor includes a stationary base and an elastic component. The stationary base includes a displacement restraint, and the elastic component includes a contact end and a fixed end. The displacement restraint is coupled to the cavity to prevent the stationary base from being displaced in the radial direction for fixing stationary base firmly in the cavity. The fixed end is connected to the stationary base, and the contact end contacts a bottom surface of the cavity in order to sense a force along the radial direction.

A method for monitoring a drive belt is disclosed. A drive pulley driving by a drive motor and having a drive belt is provided. First and second markings are provided on the belt. The markings are detected. A correlation is determined and a signal is generated if a reference value is exceeded.