Abstract: An abnormality diagnosis device for a ball screw includes a vibration sensor that detects vibration during an operation of the ball screw, a filter processing unit that executes, on a vibration signal acquired by the vibration sensor, filtering processing for extracting a frequency band including at least a characteristic frequency corresponding to a specific frequency of the ball screw, an envelope processing unit that executes envelope processing for a vibration signal after the filtering processing, a frequency analysis processing unit that executes fast Fourier transform processing on a time domain signal after the envelope processing, a peak hold averaging processing unit that executes peak hold averaging processing for frequency domain data for each sampling period in the fast Fourier transform processing, and an abnormality determination unit.

Abstract: A measurement method for measuring a state of a device in which lubrication between components is performed by a lubricant, the method including: applying an AC voltage to an electric circuit formed of the components to be lubricated by the lubricant; measuring an impedance of the electric circuit and a phase angle at the time of applying the AC voltage; and deriving an oil film thickness and a metal contact ratio between the components based on the impedance and the phase angle, in which the oil film thickness and the metal contact ratio between the components are derived by using a calculation formula in which a capacitance of the contact region is defined by a probability density function of a surface roughness between the components in a contact region between the components.

Abstract: A water intrusion detection method for detecting intrusion of water into a lubricant in a device in which a plurality of portions are lubricated using the lubricant, includes: measuring an impedance of an electric circuit including the plurality of portions by applying an AC voltage to the electric circuit while sweeping a frequency; and detecting the intrusion of water into the lubricant by comparing characteristics indicated by a real part and an imaginary part of an impedance measured in a state in which water is not mixed into the lubricant with characteristics indicated by a real part and an imaginary part of the impedance measured by the measurement.

Abstract: A two-speed transmission includes a learning function performing mode switching between a first mode and a second mode on a condition that a predetermined learning start condition is satisfied, and, in an inertia phase during the mode switching, calculating a friction coefficient between a first friction plate and a second friction plate based on output torque of a drive motor and angular acceleration of an output shaft of the drive motor, and obtaining a ?-V characteristic that is a relationship between the friction coefficient and a differential rotation V that is a difference in the rotational speed of any two elements of a planetary transmission mechanism.

Abstract: A cooking oil degradation suppression filter that can effectively and easily suppress degradation of cooking oil without using a filter aid or the like and can prevent a decrease in the taste of food caused by separation of a degradation suppression agent. The cooking oil degradation suppression filter includes fiber (10) and at least one degradation suppression agent (13) selected from a carbonate, a silicate, a tartrate, an oxide, a hydroxide, an alginate, and a phosphate.

Abstract: A resin cage includes at least one annular portion, a plurality of column portions each extending from the annular portion in an axial direction and provided at equal intervals in a circumferential direction, and pockets formed between adjacent column portions. The annular portion has a guide surface that is guided by an inner circumferential surface of an outer ring or an outer circumferential surface of an inner ring, and a gate G for injection-molding the resin cage is provided on an inner circumferential surface of all the column portions, and is displaced in the circumferential direction from a circumferential center position of each column portion. The gate is provided within a range where an inner ring raceway groove is formed in the axial direction, or within a range where the inner ring raceway groove and a counterbore of the inner ring are formed.

Abstract: A rotation angle sensor including: a magnet fixed to an end on an opposite side to an output end of a rotation shaft of a motor; a circuit board on which a plurality of magnetic resistance sensor elements are mounted; and a support member fixed to the motor, wherein the circuit board is arranged between the support member fixed to the motor and the motor and is fixed to the support member in such a way that the plurality of magnetic resistance sensor elements come close to the magnet.

Abstract: A device includes a rotation drive mechanism (2) that rotates a metal ring-shaped member (5) in a circumferential direction around a reference axis, a grinding mechanism (40) having a grinding stone (3) pressed against an outer circumferential surface of the ring-shaped member (5), and a support mechanism (4) that supports the ring-shaped member (5). The support mechanism (4) has a support portion (42) that is brought into contact with an inner circumferential surface of the ring-shaped member (5) in at least one circumferential range around the reference axis.

Abstract: A rotation support device for flying object has a stationary body having double-row outer ring raceways on an inner circumferential surface thereof and capable of supporting a motor stator, a rotating body having double-row inner ring raceways on an outer circumferential surface thereof and capable of supporting a motor rotor and a propeller, and a plurality of rolling elements arranged between the double-row outer ring raceways and the double-row inner ring raceways so as to be able to roll freely, at least one outer ring raceway of the double-row outer ring raceways directly formed on the inner circumferential surface of the stationary body and/or at least one inner ring raceway of the double-row inner ring raceways directly formed on the outer circumferential surface of the rotating body 3.

Abstract: A method for evaluating a filtration filter used for recycling used fats and oils includes: an imaging step of capturing an image of fats and oils filtered by the filtration filter or an image of the fats and oils diluted with a solvent together with a color chart by an imaging device; an image information acquisition step of acquiring image information of the imaged fats and oils or image information of the fats and oils diluted with the solvent based on image information of the imaged color chart; a fats and oils deterioration determination step of determining a deterioration state of the fats and oils based on the image information; and a filtration filter evaluation step of evaluating filtration performance and deterioration inhibiting performance of the filtration filter based on a determination result of the fats and oils deterioration determination step.

Abstract: In a reverse input cutoff clutch (1), two contact parts (PI1 and PI2) of a first group are respectively disposed closer to a first reference line (RL1) than two of a fifth contact part (PO1), a sixth contact part (PO2), a seventh contact part (PO3), and an eighth contact part (PO4), and two contact parts (PI3 and PI4) of a second group are respectively disposed farther from the first reference line (RL1) than the other two of the fifth contact part (PO1), the sixth contact part (PO2), the seventh contact part (PO3), and the eighth contact part (PO4).

Abstract: The electric friction engagement device has a function of detecting a phase in a rotational direction of a drive cam when an output torque or current value of a shift motor begins to increase at a rate of increase equal to or greater than a first threshold value as a piston touch point and a function of detecting a phase in the rotational direction of the drive cam when the rate of increase becomes equal to or less than a second threshold value after exceeding the piston touch point as a clutch touch point.

Abstract: This load estimating device for a rolling bearing comprises: a vibration sensor for measuring vibrations of the rolling bearing during rotation; a rotational speed sensor for measuring the rotational speed of the rolling bearing during rotation; a deriving means for deriving a vibration value for a predetermined vibration frequency, using vibration information measured by the vibration sensor; and an estimating means for estimating a load acting on the rolling bearing, said load corresponding to the rotational speed measured by the rotational speed sensor and the vibration value derived by the deriving means, using a table defining a correspondence relationship between the load acting on the rolling bearing, the vibration value for the predetermined vibration frequency, and the rotational speed.

Abstract: A ball screw device of the present disclosure includes: a screw shaft in which an outer peripheral raceway surface is provided on an outer peripheral surface; a nut into which the screw shaft is inserted and in which an inner peripheral raceway surface is provided on an inner peripheral surface; a plurality of balls arranged on a raceway between the outer peripheral raceway surface and the inner peripheral raceway surface; and at least one deflector provided with an S-shaped groove surface that circulates the balls. The outer peripheral surface of the screw shaft is provided with a recess portion that is recessed to an inner side in a radial direction and that houses the deflector, and an inner peripheral surface of the recess portion and an outer peripheral surface of the deflector are not circular when viewed from an outer side in the radial direction of the screw shaft.

Abstract: A rotation support device includes a rotation shaft; and a pair of support mechanisms that rotatably support the rotation shaft, respectively. One of the pair of support mechanisms includes a bearing unit including a bearing housing and a bearing that rotatably supports the rotation shaft with respect to the bearing housing, a support base through which the rotation shaft passes or disposed around the rotation shaft, and a housing position adjustment mechanism disposed between the bearing unit and the support base. The housing position adjustment mechanism includes a support base side member provided on a support base side, a bearing housing side member provided on a bearing housing side and movable in the axial direction relative to the support base side member, and a working fluid in a compressed state filling a pressure chamber formed between the support base side member and the bearing housing side member.

Abstract: The present invention provides a grease composition for rolling bearings, comprising a base oil; as a thickener, a complex amido-lithium soap; as antioxidants, 0.5 to 5% by mass of an amine-based antioxidant and 0.5 to 5% by mass of a phenol-based antioxidant, based on the total mass of the composition; and as rust inhibitors, 0.1 to 5% by mass of a carboxylic acid-based rust inhibitor, 0.1 to 5% by mass of a carboxylate-based rust inhibitor, and 0.1 to 3% by mass of an amine salt of a fatty acid, based on the total mass of the composition, wherein a 60-stroke worked penetration is 260 to 320 as measured according to JIS K 2220 7.

Abstract: A rotation support device includes a rotation shaft, and a pair of support mechanisms that rotatably support both end portions in an axial direction of the rotation shaft, respectively. One of the pair of support mechanisms includes a bearing unit including a bearing housing and a bearing, a support base, and a housing position adjustment mechanism. The housing position adjustment mechanism includes a support base side member through which the rotation shaft passes or disposed around the rotation shaft, a bearing housing side member through which the rotation shaft passes or disposed around the rotation shaft, and movable in the axial direction relative to the support base side member, an elastic member disposed between the support base side member and the bearing housing side member, and a damping member disposed between opposing surfaces of the support base side member and the bearing housing side member.

Abstract: A support mechanism which supports both ends in an axial direction of a screw shaft in a rotatable manner includes a bearing unit including a movable side bearing housing and a pair of angular ball bearings, a support base, and a housing position adjustment mechanism disposed between the bearing unit and the support base. The housing position adjustment mechanism includes a support base side member, a bearing housing side member, a partition member disposed in a space formed between the support base side member and the bearing housing side member and dividing the space in the axial direction into a first space and a second space, a plurality of disc spring and a first working fluid accommodated in a compressed state in the first space, and a hollow member and a second working fluid accommodated in a compressed state in the second space.

Abstract: A mechanical equipment monitoring system includes a sensor, an actuator, a communication unit that transmits a trigger signal when the actuator is in a suitable state for the sensor to detect an operational state of the actuator, an information collection unit that collects, from the sensor, operational state data which indicates the operational state detected by the sensor upon receiving the trigger signal from the communication unit, and an information processing device that monitors the actuator based on the operational state data collected by the information collection unit.

Abstract: A manufacturing method of a rolling bearing ring comprising: a step of obtaining a base member; a step of forming, by laser cladding, a cladded layer made of a metal material having a higher hardness than the base member on one surface of the body member; a step of forming a rolling element guide surface by finishing a surface of the cladded layer; and a step of forming, by laser hardening, a hardened layer over the entire circumference of a surface layer portion of at least a part of the base member that is separated from the cladded layer.