Abstract: A state monitoring method for a mechanical device, performing a rotation operation, includes: an acquisition step of acquiring rotational speed data and vibration data during the rotation operation of the mechanical device; a conversion step of converting the vibration data from a time domain to an angle domain using the acquired rotational speed data and the acquired vibration data; a reconversion step of reconverting the converted vibration data into a time domain based on a predetermined reference speed; and a diagnosis step of diagnosing a state of the mechanical device using the converted vibration data, in which in the conversion step, when the rotational speed data includes a section in which a rotational speed is zero or substantially equal to zero, the rotational speed data is corrected such that the rotational speed fluctuates in the section, and then the vibration data is converted into an angle domain.

Abstract: A probe includes a substantially columnar probe main body configured to detect an impedance of a bearing by coming into contact with a measurement target surface of the bearing, a housing having therein a sliding hole extending in an axial direction, the housing being configured to accommodate the probe main body disposed in the sliding hole, an abutting portion provided at a distal end portion of the housing and configured to abut against the measurement target surface of the bearing, and a biasing spring disposed in the sliding hole of the housing and configured to bias the probe main body in the axial direction with respect to the housing, the abutting portion includes four protrusions protruding in the axial direction, and when viewed from the axial direction, the four protrusions are respectively positioned at vertices of a rectangle centered on a central axis of the probe main body.

Abstract: The rotational support device for flying object has a stationary body having double-row outer ring raceways, each of which is of an angular type, on an inner circumferential surface thereof, a rotating body having double-row inner ring raceways, each of which is of an angular type, on an outer circumferential surface thereof, and capable of supporting a propeller of a flying object on a first side in an axial direction, and balls arranged between the double-row outer ring raceways and the double-row inner ring raceways in a state where a back-to-back contact angle is applied to each row of the balls. A pitch circle diameter of first balls of the balls arranged on the first side in the axial direction and a pitch circle diameter of second balls of the balls arranged on a second side in the axial direction are different from each other.

Abstract: A flange integrated with an inner ring is formed at one end of the inner ring in an axial direction, and a flange member separate from the inner ring is fastened to a fastening member extending in the axial direction at the other end of the inner ring in the axial direction, and the flange member includes a base abutting against the inner ring in the axial direction and on which a head of the fastening member is seated, and a caulking portion pressing the head of the fastening member from the other end side in the axial direction.

Abstract: A reverse-input blocking clutch includes a leaf spring having: two held portions that is arranged on both sides of an input-side engaging portion of an input member with respect to a second direction perpendicular to a first direction which is a direction of movement of a pressing surface of an engaging element moving away from or toward a pressed surface of a pressed member and a center axis of the input member, and elastically held between the input-side engaging portion and an input-side engaged portion of the engaging member; and a base portion that connects the two held portions.

Abstract: A press-formed product manufacturing method includes obtaining a first piece (19, 55) by punching a metal material, obtaining a second piece (28, 50) by comprising an edge of a second surface (8) of the first piece (19, 53) sandwiching the first piece (19, 55) between a first die (25) and a second die (26), and trimming a second piece (28) by using press working.

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: 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.