Nsk Corporation

Proterial, Ltd.

Seigou Urakami

Takashi Kato

Akihiro Yamamoto

Yasuo Murakami

Koichi Yamamoto

Kota Fukuda

Takashi Onimoto

Yoichi Matsumoto

Tomoharu Sugiman

Takao Katougi

Daisuke Himeda

Youichi Matsumoto

Hirotaka Kishida

Shohei Kaneko

Yiming Jin

Toshiharu Honda

Katsuhiro Ikezawa

Ricardo Rodriguez Lopez

Akitoshi Fujimori

Aya Kikuchi

Juji Harada

Katsushiro Ikezawa

A cam device having a drive cam and a driven cam; and a friction engagement device having at least one friction plate and at least one separation plate are provided. The friction engagement device is configured so as to be put into a connected state by pressing the friction plate and the separation plate against each other by the driven cam, and a disconnected state. Also provided are a rotation transmission state switching device having a first member and a second member coaxially arranged, and a mode selecting part configured to rotate or displace in the axial direction according to rotation of the drive cam. The rotation transmission state switching device has at least one mode of a free mode and a lock mode of the first member and the second member, and a one-way clutch mode.

Motive power transmission route switching device and two-speed transmission

A rotation-support apparatus having construction in which large force is not applied to continuous sections between column sectionsand rim sectionseven when needlespush in the circumferential direction against the side surfaces in the circumferential direction of the column sections, thus making it possible to improve the durability of a retainer Of both side surfaces in the circumferential direction of a straight sectionon the inner-radial side in the middle section in the axial direction of the column sections, the portion near the outer-radial side of the retaineris more recessed than the portion near the inner-radial side of the retainer. Moreover, this portion near the inner-radial side is located within the pitch circle P of the needles. Furthermore, there is no contact between the rolling surfaces of the needlesand the straight sectionon the inner-radial side. As a result, it is possible to reduce the moment load applied to the column sectionsfrom the needles

Rotation support apparatus

A rolling bearing fixing device includes at least one bearing having mutually rotatable inner and outer rings, a housing having at least one fitting hole into which the bearing is fitted and a bolt insertion hole, a pair of fixing plates having at least one large-diameter hole and a bolt insertion hole; and a bolt inserted from one axial end into the bolt insertion hole of one fixing plate, the bolt insertion hole of the housing, and the bolt insertion hole of the other fixing plate, and connects the housing with the pair of fixing plates. Both axial end parts of the outer ring are held by the pair of fixing plates in the axial direction, the inner ring is positioned further inwardly of the large-diameter hole of the fixing plates in the radial direction and the inner ring is rotatable with respect to the fixing plates.

Bearing fixing device and bearing unit

A retainer plateis fitted on a smaller-diameter step portionof an outer ring, and a retaining ringfitted on the smaller-diameter step portionis engaged with retaining projectionsformed on an inner circumferential surface of a fitting holeformed through the retainer plate, thereby preventing the retainer platefrom falling-off from the smaller-diameter step portion. The structures and shapes of the various portions are so determined that working or machining can be easily effected to form these portions so as to overcome a problem encountered with the conventional structure.

Rolling bearing unit for rotation support unit

To predict a correction rated life at high accuracy. A life predicting device executes step S, step S, step Sfor inputting specification information including a basic dynamic rated load C and basic static rated load C, stepfor computing a dynamic equivalent load P based on the specification information. step Sfor setting a reliability factor a, step Sand step Sfor determining a contact ellipse area S, step Sfor inputting a foreign substance purchasing diameter d('debris' means 'foreign substance'), stepfor determining a standardized foreign substance diameter (d/&#x221a; S), step Sfor setting a life correction coefficient abased on the standardized foreign substance diameter, and step Sand step Sfor calculating a correction rated life Lbased on the reliability coefficient, the life correction coefficient, the basic dynamic rated load and the dynamic equivalent load and the like.

Life predicting method for rolling bearing, life predicting device, rolling bearing selecting device using life predicting device, program and environment coefficient determining method

There is adopted a constitution of arranging a spacerat a shaft center portion and arranging a retainerand a roller(cage & roller) at two sides thereof in order to prevent the roller (roller) from being rolled at the center portion in an axial direction of the shaft maximizing an amount of bending the shaft. At the double side rows, the bending of the shaft is not as large as that of the center portion and therefore, the roller (roller) is not hampered from being rolled smoothly.

Radial needle-like roller bearing and pinion shaft

Growing community of inventors

Kanagawa, Japan

Seigou Urakami