Abstract: An apparatus for selectively drivingly connecting two drive spindles to roll necks of a rolling mill includes a base frame, a movable frame slidable on said base frame, two pairs of sliding posts vertically secured on a transverse member of the movable frame, at least two pairs of holding means slidable on the pairs of sliding posts and actuated by a hydraulic actuating means respectively so as to hold yokes of the drive spindles in a position in alignment with the roll necks of the roll mill, and another hydraulic actuating means actuating the movable frame toward studs of a pinion stand or the roll necks of the roll mill.

Abstract: A torque measuring device. The device comprises a mount base which is supported by a housing for swing motion around the axis of an output rotary shaft and for mounting an output rotary shaft-driving rotary machine thereon and whose center of gravity is located on the axis of a bearing assembly, a torque transmitting lever with its center of gravity located on the axis of its pivot for transmitting torque to a second lever, which second lever has a distal arm carrying thereon a moving coil disposed in a fixed magnetic field and is adapted to have a torque in the mount base transmitted thereto at its proximal point of action, and a position detector which detects the position of the moving coil and feeds its current output corresponding to a variation in the position of the moving coil back to the latter. This device is handy to carry.

Abstract: Fitting yokes are coupled each by a universal joint of the trunnion type to the opposite ends of a shaft assembly biased for axial extension. Each of the fitting yokes has a sleeve inserted in a center bored portion of the universal joint with a clearance formed therebetween to permit relative angular displacement between the axis of the shaft assembly and the axis of the fitting yoke. The drive shaft therefore has a greatly reduced length in its entirety. The shaft assembly includes a splined portion adapted to permit collapsing and extension of the assembly and circumferentially covered with a sleeve-shaped cover. The cover defines an interior space holding a lubricant to lubricate the spline portion for sliding movement.

Abstract: The coupling of a drive spindle to be fitted to a driven shaft has a fitting bore provided with liner grooves of suitable width opposed to each other diametrically of the bore and extending in parallel axially thereof. Two wedge-shaped superposed liners are fitted in each of the liner grooves in such a combination that the planar surfaces of the inner liners facing each other provide diametrically opposed parallel planar surfaces defining the fitting bore. The inner liners are movable in parallel radially of the fitting bore by axially moving the outer liners to bring the opposed planar surfaces of the inner liners into intimate fitting contact with parallel planar surfaces formed on the peripheral surface of the driven shaft and opposed to each other diametrically of the shaft. The liners in this state are locked to the coupling, rendering the drive apparatus operable free of oscillation.

Abstract: The opposed ends of a plurality of aligned rotary shafts are connected together by a spindle assembly including universal joints at its opposite ends. The spindle assembly comprises a splined spindle, sleeve-shaped flanged yokes slidably mounted on the opposite ends of the splined spindle respectively, and fitting yokes connected by trunnions to the flanged yokes respectively and each formed with a bore for receiving the end of the rotary shaft so as to be rotatable therewith only in the direction of rotation of the rotary shaft. The splined spindle is provided at each of its opposite ends with a stopper member engageable with the opposed end of the flanged yoke to retain the flanged yoke on the spindle. A sealing member in the form of bellows is provided between the flanged yokes.

Abstract: A support assembly for coupling of a large-sized universal joint of the cardan type as incorporated in a drive assembly for rolling mills. The assembly supports the coupling on a drive spindle portion to prevent the coupling from hanging. A locking rod fixed to the center of the coupling extends through a hole of large diameter formed in the center of the spider of the universal joint, with a sufficient radial clearance provided between the rod and the inner periphery of the spider. The piston rod of a hydraulic cylinder disposed within an inner bore of the drive spindle portion operates to slidingly move a rod receiving member within the bore, thereby bringing a recess portion of the rod receiving member into engagement with or disengagement from the free end of the locking rod. The coupling is securely supported on the drive spindle portion by the engagement of the rod receiving member with the locking rod.

Abstract: An apparatus for releasing a drive assembly from the neck of a roll of rolling mills and connecting the assembly to the roll neck. The apparatus comprises a pair of rails supported on fixed posts and extending in parallel to the axis of a working roll, a support member slidable on the rails, holding means mounted on the support member for holding the coupling of the drive assembly to be released from or connected to the neck of the roll in pressing with the outer periphery of the coupling, and operating means for slidingly moving the support member on the rails. The coupling is releasable from or connectable to the roll neck with ease for the replacement of the working roll. The apparatus is well-suited to small-sized rolling mills.

Abstract: A shaft member connected to a drive fitting yoke by a joint member is splined to a shaft member connected to a driven fitting yoke by a joint member. A spring accommodated in a hollow chamber continuously extending through the shaft members axially biases the shaft members away from each other. Limiting means for limiting the maximum length of extension of the shaft members prevents the spring from exerting a thrust load on the drive shaft element and driven shaft element interconnected by the drive shaft. The spline coupling portion has an increased diameter to ensure the strength of the drive shaft.

Abstract: Two drive assemblies disposed one above the other and each including a telescopic spindle, a universal joint and a coupling member are released from and connected to similarly disposed driven shafts respectively by an apparatus comprising a frame slidable toward or away from the driven shafts in parallel to the extensions of the axes of the driven shafts and upper and lower holding means vertically slidably supported by posts on the front end of the frame and each adapted to hold the opposite sides of the coupling member to support the coupling member in its horizontal position in alignment with the corresponding driven shaft when the coupling is to be released from or connected to the driven shaft. For the replacement of the driven shafts, the upper and lower coupling members as supported in their horizontal position by the holding means are vertically moved in a given ratio relative to each other and thereby brought into alignment with new driven shafts.

Abstract: A spring for longitudinally extending a drive shaft is disposed between a drive shaft member and a driven shaft member which are axially extensibly connected together as by a spline connection. The end surface of a driven shaft element adapted to be loosely fitted in a coupling connected to the driven shaft member has a cylindrical body fixed thereto coaxially with the center hole therein. The inner bottom of the coupling is provided at its center with a fitting hole of large diameter and a number of taper rollers are disposed in an annular space which is defined between the cylindrical body and the fitting hole as a result of the fitting between the coupling and the driven shaft element, thereby automatically bringing the axes of the coupling the driven shaft element into alignment with each other and eliminating the problem of rotational vibration due to the loose fit between the coupling and the driven shaft element.

Abstract: A drive mechanism which itself has the function of mounting a driven coupling on and dismounting it from a roll neck. The drive mechanism comprises a drive shaft section comprising inner and outer shafts coupled together in such a manner as to be only axially slidable, an extensible operating mechanism disposed between the inner and outer shafts for extending and collapsing the drive shaft section to mount the coupling on and dismount it from the neck of a working roll, a spring disposed between the inner and outer shafts and acting in a direction in which it reduces the length of the drive shaft section, and fixing device for fixing the drive shaft section to a drive universal joint when the drive shaft section is reduced in length.

Abstract: A needle case and a yoke are respectively formed on their surfaces to be joined together with a key and a keyway which are so shaped as to provide a clearance for receiving a wedge of suitable shape. When driven into the clearance thus provided in the keyway between the needle case and the yoke fastened together, the wedge tightly holds them together in intimate contact with each other.

Abstract: A device comprising a sleeve-like outer member to be fixedly fitted in a bore of a housing, an annular inner member of L-shaped section having a flange secured to one end of the outer member, with an annular pressure chamber provided between the outer member and the inner member for receiving a pressure fluid, an outer ring of a roller bearing fitted in the outer member slidably only in an axial direction and having a cylindrical portion axially extending from its one end having a smaller inside diameter, the outer ring having its cylindrical portion slidably fitted in the pressure chamber, and sealing means for sealing clearances between the cylindrical portion and the outside and inside surfaces defining the pressure chamber and in sliding contact with the cylindrical portion, whereby the pressure of the fluid within the pressure chamber is axially applied directly to the outer ring to automatically adjust the preload on the bearing including the outer ring.

Abstract: A device comprising an outer ring formed with a cylindrical portion extending from its small diameter end at the radially inward portion thereof, a case having an inside surface including a large diameter cylindrical surface and a small diameter cylindrical surface to provide a stepped portion in the inside surface, the outer ring being received in the case in sliding contact with the large diameter cylindrical surface and the small diameter cylindrical surface, means for rendering the outer ring slidable only axially within the case, means for sealing the large diameter and small diameter sliding contact surfaces of the case and of the outer ring, and a pressure chamber defined by and provided between stepped portion end surfaces axially facing each other and formed between the large diameter and small diameter sliding contact surfaces of the case and of the outer ring to receive a pressure fluid.