KOYO MACHINE INDUSTRIES CO., LTD.
|KOYO MACHINE INDUSTRIES CO., LTD. Patent applications|
|Patent application number||Title||Published|
|20150239089||SURFACE GRINDING METHOD FOR WORKPIECE - [Problem] To machine a workpiece such as a hard brittle material or difficult-to-cut material innovatively and accurately and to improve the machining rate significantly.||08-27-2015|
|20140212593||METHOD OF MANUFACTURING SPLINE TELESCOPIC SHAFT - A method of manufacturing a spline telescopic shaft, includes a sliding step of sliding in an axial direction an inner shaft manufacturing intermediate member and an outer shaft manufacturing intermediate member, in one of which a resin coating is disposed on splines. In the sliding step, a sliding load of the inner shaft manufacturing intermediate member and the outer shaft manufacturing intermediate member is detected, and sliding is ended at a timing when the detected sliding load reaches a threshold load which is determined based on an initial sliding load detected at a start of the sliding.||07-31-2014|
|20120142439||SHAFT-AND-YOKE COUPLING STRUCTURE AND VEHICLE STEERING SYSTEM - Provided is a shaft-and-yoke coupling structure for coupling a steering transmission shaft and a yoke of a universal joint. An end portion of the steering transmission shaft joined to the yoke has a stepped portion and an insertion convex portion protruding from the stepped portion in the axial direction of the steering transmission shaft. The yoke has an annular receiving portion facing and fixed to the stepped portion via a welded portion and an insertion recess portion surrounded by the receiving portion in which the insertion convex portion is inserted. The insertion convex portion and the insertion recess portion are arranged to be engaged with each other with a predetermined amount of play in the direction of rotation when the welded portion is broken.||06-07-2012|
|20120080258||SPLINE TELESCOPIC SHAFT, VEHICLE STEERING APPARATUS WITH THE SPLINE TELESCOPIC SHAFT, AND METHOD FOR MANUFACTURING THE SPLINE TELESCOPIC SHAFT - A spline telescopic shaft includes an inner shaft and a tubular outer shaft fitted slidably in an axial direction, outer splines provided on an outer periphery of the inner shaft, inner splines provided on an inner periphery of the outer shaft, a resin coating provided on at least one of the outer splines and the inner splines, and a lubricant retaining groove formed on the resin coating by using any of a laser, water jet, and compressed air, and extending in a direction crossing the axial direction.||04-05-2012|
|20110034256||Spline telescopic shaft, method for manufacturing spline telescopic shaft, and vehicle steering apparatus - A spline telescopic shaft includes an inner shaft having an outer tooth surface, and a cylindrical outer shaft having an inner tooth surface and arranged to fit to the inner shaft slidably in an axial direction of the inner shaft. Either one of the outer tooth surface and the inner tooth surface includes a first resin coating. The other of the outer tooth surface and the inner tooth surface includes a second resin coating. The second resin coating is formed by processing for sliding an intermediate member for manufacturing the inner shaft and an intermediate member for manufacturing the outer shaft in the axial direction, to transfer a part of a resin material provided in the intermediate member for manufacturing the shaft including the one tooth surface for forming the first resin coating to the intermediate member for manufacturing the shaft including the other tooth surface.||02-10-2011|
|20110030496||Spline telescopic shaft and method for manufacturing the same and vehicle steering apparatus - There is provided a spline telescopic shaft having first and second shafts that are fitted to each other slidably in an axial direction. First and second splines that engage with each other are respectively provided in the first and second shafts. A resin coating that is provided on at least a tooth surface of the first spline is fitted to a tooth surface of the second spline. The resin coating is subjected to heat fitting processing for sliding the first and second shafts in the axial direction under predetermined conditions, to fit a surface of the resin coating to the tooth surface of the second spline.||02-10-2011|
|20100003908||INCLINATION ANGLE ADJUSTING DEVICE AND WORKPIECE ATTACHING DEVICE - To facilitate with high accuracy adjustment of a minute angle degree and also to sufficiently secure the rigidity of a whole device after the adjustment. Provided are a workpiece attaching body||01-07-2010|
|20100003907||INCLINATION ANGLE ADJUSTING DEVICE AND WORKPIECE ATTACHING DEVICE - The present invention facilitates with high accuracy the adjustment of a minute angle degree, and also is capable of sufficiently securing the rigidity of the whole device after the adjustment and provides good operability, accuracy, and rigidity. Provided are a workpiece attaching body having a workpiece attaching surface and a rotating body rotatably supporting the workpiece attaching body. The rotating body has an inclination angle adjusting surface inclined relative to an axis of the rotating body, the workpiece attaching body has opposite to the workpiece attaching surface an inclination angle adjusting surface which is inclined relative to the workpiece attaching surface and which comes in surface contact with the inclination angle adjusting surface of the rotating body, and spherical coupling means is arranged which is for rotatably adjustably coupling the workpiece attaching body and the rotating body about a spherical center on an axis of the rotating body along both inclination angle adjusting surfaces. Thereby, the rotating body and the workpiece attaching body are relatively rotated about the spherical center along both inclination angle adjusting surfaces so as to adjust the inclination angle of the workpiece attaching surface.||01-07-2010|
|20090280914||Telescopic shaft and vehicle steering apparatus - A telescopic shaft (||11-12-2009|
|20090242315||UNIVERSAL JOINT YOKE, UNIVERSAL JOINT, AND VEHICLE STEERING APPARATUS - A universal joint yoke includes: a cylindrical portion for fixing a shaft; a slit that is formed in the cylindrical portion and that extends from one end of the cylindrical portion in an axial direction of the cylindrical portion, which is a first direction; a reinforcement flange that extends from the other end of the cylindrical portion radially outward with respect to the cylindrical portion; and a pair of arms that extend from the reinforcement flange on a side opposite to a side on which the cylindrical portion is provided and that are swingably coupled to another yoke via a coupling shaft.||10-01-2009|
|20080305724||Surface grinding machine, spindle device and surface grinding method - In through-feed grinding workpieces by grinding stones rotating around the axes of spindles, the spindles are tiltably held by elastic holding means around tilt axes substantially orthogonal to the direction of exit and entrance of the workpieces with respect to the grinding stones. When a grinding loads are imposed on the entrance sides of the grinding stones, the spindles are tilted by offset loads around the tilt axes against the force of urging means in such a manner that the axial displacement and the exit displacement of the grinding stone due to the offset load are substantially the same. The grinding stones are reset around the tilt axes by the elastic holding means immediately before the end of processing at which time the axial displacement is smaller. This makes it possible to reduce the number of defectively ground articles coming from the through-feed grinding and reduce the wear in the grinding stones.||12-11-2008|
|20080233843||Two-sided surface grinding method and apparatus - In effecting two-sided surface grinding for surface-grinding the opposite surfaces of a workpiece simultaneously by a pair of oppositely disposed grinding wheels, infeed grinding is performed by oscillating the workpiece within the range where the surfaces to be ground of the workpiece do not protrude from the inner and outer peripheries of the grinding wheel surfaces of the grinding wheels, and then through-grinding is performed by feeding the workpiece to allow the surfaces to be ground to pass along the inner and outer peripheries of the grinding wheel surfaces. As an effect, worn wheel edges or the like can be prevented from being formed in the inner and outer peripheral edges, that grinding wheel surfaces can be maintained in proper shape for a prolonged time, that the grinding accuracy is better, and that dress interval can be prolonged, thus improving the life of grinding wheels.||09-25-2008|
Patent applications by KOYO MACHINE INDUSTRIES CO., LTD.