Nsk Corporation

Hiroki Mizuno

Shigeo Tokura

Hiroshi Shibazaki

Masanori Takahashi

Nobuyuki Hagiwara

Kiyoshi Sadakata

Kazuo Chikaraishi

Katsuhisa Tonooka

Osamu Tatewaki

Yuko Kamamura

Tadashi Hibino

Minao Umeda

Kaname Yasuda

Masaharu Igarashi

Masahiro Inoue

Kazuho Chikaraishi

Masaji Kashimoto

Takayuki Kurashima

Structure of a cross universal joint is achieved in which the fact that an excessive torque was applied to a universal joint due to a collision accident or mishandling can be easily determined afterwards. Protrusions, which are straight lines as seen from the outside surface sides of linking arm sectionsof a yoke, are formed on the outside surfaces of the linking arm sections. When an excessive torque acts and the linking arm sectionsare plastically deformed, the protrusionschange from a straight line to a non-straight line. From this change it is possible to easily confirm that an excessive torque has been applied to a cross universal joint that includes this yoke. Moreover, when the space between the inside surfaces of the linking arm sectionsis taken to be D, and the length in the axial direction of the linking arm sectionsis taken to be L, the dimensions of the parts of the yokeare regulated so that the relation 3&#x3c;L/D&#x2266;4 is satisfied.

Cross universal joint and manufacturing method thereof

The present ball/roller bearing cleaning method is a method which, using cleaning liquid, cleans a bearing to be cleanedcomposed of an inner ring, an outer ring, a rolling bodiesand a retainer. In the cleaning method, the cleaning liquidis made to flow through the bearing to be cleanedfrom the axial direction of the present bearinginto spaces in which the raceway surfaces of the inner and outer ringsandof the bearing to be cleanedsurround the rolling bodiesand retainer. For example, a cylindrical-shaped rotary diehaving spiral groovesis interposed into a cleaning liquid supply passage, and the cleaning liquidis supplied to thereby rotate the cylindrical-shaped rotary die, whereby the cleaning liquid having high pressure can be supplied to the bearing to be cleanedfrom the cylindrical-shaped rotary die

Ball/roller bearing cleaning method and apparatus thereof

In a ring shaped part washing method an ultrasonic vibration plate is disposed in a washing tank filled with a washing fluid , and ultrasonic waves generated by the ultrasonic vibration plate are applied to ring-shaped parts disposed in the washing tank to thereby remove foreign substances stick to the ring-shaped parts therefrom. The ring-shaped parts are disposed inclinedly with respect to the ultrasonic vibration plate in such a manner that the axes of the ring-shaped parts intersect with the plate surface of the ultrasonic vibration plate at an angle &thgr; other than a right angle.

Ring-shaped part washing method and washing jig used in the method

The present ball/roller bearing cleaning method is a method which, using cleaning liquid , cleans a bearing to be cleaned composed of an inner ring , an outer ring , a rolling bodies and a retainer. In the cleaning method, the cleaning liquid is made to flow through the bearing to be cleaned from the axial direction of the present bearing into spaces in which the raceway surfaces of the inner and outer rings and of the bearing to be cleaned surround the rolling bodies and retainer. For example, a cylindrical-shaped rotary die having spiral grooves is interposed into a cleaning liquid supply passage, and the cleaning liquid is supplied to thereby rotate the cylindrical-shaped rotary die , whereby the cleaning liquid having high pressure can be supplied to the bearing to be cleaned from the cylindrical-shaped rotary die

Ball/roller bearing cleaning apparatus

An internal grinding method for grinding an inner surface of a work having a straight line generatrix shape while performing an in-process inner-diameter size measurement intermittently through oscillation synchronized between a grindstone and a measurer; wherein a circumferential surface of the grindstone is trued into a shape inclined with respect to a moving direction of a X-axis slide table moving forward/backward relative to the work so that normal grinding force when the X-axis slide table moves backward is reduced, while the work is supported with inclination with respect to the moving direction of the X-axis slide table so that the X-axis slide table is oscillated in the moving direction.

Internal grinding method and internal grinding machine

Growing community of inventors

Kanagawa, Japan

Hiroki Mizuno