Ntn Corporation

Osamu Shimizu

Akira Sera

Michio Iihara

Nobuo Suzuki

Hisaaki Kura

Eiji Tajima

Katsuyuki Ikei

Shuji Mochinaga

Shigeyoshi Ishiguro

Morihisa Yoshioka

Masami Yamaguchi

Kenichi Nakano

Hiroshi Nakahashi

Arrangement for joining outer ring and shaft of homokinetic joint

A homokinetic joint which can be manufactured at low cost. Its outer ring and inner ring has a spherical inner surface and a spherical outer surface both formed with a plurality of track grooves in which are received torque transfer balls retained by a cage. The spherical inner surface and the track grooves of the outer ring are finished by plastic working, so that no additional finishing work is necessary. Thus, the outer ring can be manufactured at low cost.

Homokinetic joint having an outer ring formed with track grooves which

A cold forged pulsar ring (1) which comprises a ring body (1a) having inner and outer peripheral surfaces. A plurality of circumferentially spaced gear teeth (2) are integrally formed by the use of a cold forging process with one of the inner and outer peripheral surfaces of the ring body (1a) so as to protrude radially of the ring body (1a). Each of the gear teeth (2) is so profiled as to have a substantially trapezoidal shape having a tooth angle (.theta.) not smaller than 5.degree., but not greater than 15.degree.. With this design, not only can a cold forging process be employed to manufacture the pulsar ring (1), but also a required output voltage can be secured from a sensor of the rotation detecting device in which the pulsar ring (1) is operatively employed.

Cold forged toothed ring for producing rotational speed signals

A cold forming method for plastic deformation process of toothed ring-shaped products (W0) have a tooth profile portion (T) in at least one of the outer peripheral surface and inner peripheral surface thereof. When processing a ring-shaped product (W0) having a tooth profile portion (T) in the outer peripheral surface, a die (1) is utilized. The die (1) has a tooth forming part (4) having a shape corresponding to the shape of the tooth profile portion (T) of the ring-shaped product (W0) in its inner peripheral surface, and, if necessary, a tip shaping part (5) positioned in the groove of the tooth forming part (4). A ring-shaped material (W) is pressed and passed into the die (1) by a punch (2) in a round shaft shape in the axial direction, and processed. When processing a ring-shaped product (W1) having a tooth profile portion (T) in an inner peripheral surface, the tooth forming part (4) and tip shaping part (5) are provided on the outer circumference of a lower punch ( 11), and the ring material (W) is pressed and passed into the lover punch (11) by an upper punch (12), and processed.

Cold forming method of toothed ring-shaped products and forming

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Iwata, Japan

Osamu Shimizu