Nara-shi, Japan
Nara-shi, Japan

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Patent
Jtekt Corporation | Date: 2016-11-11

A plurality of production facilities and an analysis apparatus are connected through a fog network. The analysis apparatus performs a data analysis based on detection information of detectors acquired through the fog network and stores determination information relating to an abnormality of each of the plurality of production facilities or an abnormality of a production object as a result of the data analysis. Each of the plurality of production facilities determines an abnormality of the each of the plurality of production facilities or an abnormality of the production object based on the determination information stored in the analysis apparatus.


Patent
Jtekt Corporation | Date: 2016-11-09

A rolling bearing includes an inner ring, an outer ring, a plurality of balls, and a cage that holds the balls. An annular groove for creep suppression is formed in a fitting surface that is fitted on a housing to which an outer ring is attached. The annular groove has a groove bottom portion and a pair of tapered surface portions extending from opposite sides of the groove bottom portion in an axial direction and defining a groove width that is larger toward the fitting surface. In a section including a bearing center line, each of the tapered surface portions has a linear sectional shape inclined to the fitting surface.


Patent
Jtekt Corporation | Date: 2016-11-09

A rolling bearing includes an inner ring, an outer ring, a plurality of balls, and a cage that holds the balls. An annular groove for creep suppression is formed in a fitting surface that is fitted on a housing to which an outer ring is attached. The annular groove has a depth at which a groove bottom portion of the annular groove is precluded from coming into contact with the mating member when a static load rating is imposed on the annular groove in a radial direction.


A communication system includes: an information acquisition unit that acquires node information, which indicates the presence or absence of the execution of a reissuing process by communication processing nodes, for a plurality of switching processes in the case where a switching process has been executed once each for all of communication lines; and a system information generation unit that generates system information, which indicates the system of a communication network, on the basis of a plurality of pieces of node information that have been acquired.


Patent
JTEKT Corporation | Date: 2017-05-17

A rack bushing supported by an annular elastic member (40) in a housing (20) includes a bushing body (50) and a flange portion (60) extending outward in a radial direction from a first axial end of the rack bushing. The flange portion is positioned at a step portion (23) of an inner periphery of the housing. The bushing body includes a second axial slit (32) extending from a second axial end to a middle portion in an axial direction. A gap that communicates with the second axial slit is formed between the inner periphery of the housing and an outer surface of the bushing body. A recessed groove (61) or communication passage of the flange portion allows a first space, disposed on a housing-end side with respect to the rack bushing in the housing, to communicate with the gap.


The present invention relates to a method of evaluating the frictions in an assisted steering mechanism (1), said method comprising a step (a) of acquiring a series of characterization points, in the course of which are measured, for several different values taken successively by the assistance load in the course of the operation of the steering mechanism, the corresponding values of friction, so as to empirically obtain a series of distinct characterization points (P1, P2, Pn) which each associate a measured value of friction (Fmes_1, Fmes_2, Fmes_n), with a measured value representative of the assistance load (Caction_1, Caction_2 Caction_n), then a step (b) of constructing an empirical friction model, in the course of which a law of correlation (L) between the constituent characterization points (P1, P2, Pn) of the series of characterization points is established on the basis of the scatter of points formed by said series of said characterization points.


Patent
Nippon Steel & Sumitomo Metal Corporation and JTEKT Corporation | Date: 2017-06-07

Provided is a steel for carbonitrided bearing which excels in hardenability and also excels in toughness, wear resistance, and surface-originated flaking life after quenching and tempering. A steel for carbonitrided bearing of the present embodiment has a chemical composition containing, in mass%, C: 0.22 to 0.45%, Si: not more than 0.50%, Mn: 0.40 to 1.50%, P: not more than 0.015%, S: not more than 0.005%, Cr: 0.30 to 2.0%, Mo: 0.10 to 0.35%, V: 0.20 to 0.40%, Al: 0.005 to 0.10%, N: not more than 0.030%, and O: not more than 0.0015%, with the balance being Fe and impurities, and satisfying Formulae (1) and (2).


Patent
JTEKT Corporation | Date: 2017-06-07

A first holder member 40 includes a first holder base 42, and first holder side walls 44 each protruding from the first holder base 42. The first holder base 42 includes a first holder principal surface 42a facing a substrate 62. Each first holder side wall 44 is a thin plate member protruding from the first holder principal surface 42a toward a second holder member 50. The first holder side walls 44 are provided on both sides of the first holder base 42 in a width direction W of the substrate 62. The first holder side walls 44 are inclined inward in the width direction W and in contact with the second holder member 50. The first holder side walls 44 include first holder side wall outer surfaces 44a. A case 20 is in contact with the first holder side wall outer surfaces 44a.


Patent
Nippon Steel & Sumitomo Metal Corporation and JTEKT Corporation | Date: 2017-06-07

Provided is a carbonitrided bearing part which has high hardenability and toughness, and is excellent in wear resistance and surface-originated flaking life. A carbonitrided bearing part of the present embodiment has a chemical composition containing, in mass%, C: 0.15 to 0.45%, Si: not more than 0.50%, Mn: 0.40 to 1.50%, P: not more than 0.015%, S: not more than 0.005%, Cr: 0.30 to 2.0%, Mo: 0.10 to 0.35%, V: 0.20 to 0.40%, Al: 0.005 to 0.10%, N: not more than 0.030%, and O: not more than 0.0015%, with the balance being Fe and impurities, and satisfying Formulae (1) and (2). At surface, C concentration is 0.7 to 1.2%, N concentration is 0.15 to 0.6%, and Rockwell hardness HRC is 58 to 65.


Patent
Jtekt Corporation | Date: 2017-07-12

In a motor control device, a velocity feed-forward control portion (24) includes a velocity-side acceleration input portion that outputs received high-order command acceleration as a velocity-side acceleration output; a velocity-side velocity input portion that outputs a received high-order command velocity as a velocity-side velocity output; velocity-side boundary-velocity input portions which are prepared so as to respectively correspond to boundary velocities, and to output velocity-side boundary velocity outputs from the velocity-side boundary-velocity input portions corresponding to the high-order command velocity, the boundary velocities being velocities at boundaries of preset adjacent velocity ranges obtained by dividing a limited velocity range; a velocity-side first weight learning portion that changes velocity-side first learning weights in accordance with a velocity deviation, the velocity-side first learning weights respectively corresponding to velocity-side first outputs; and a velocity-side output portion that outputs, as a second tentative command current, a value obtained by summing velocity-side first multiplication values.

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