Disclosed herein is a workpiece unit containing a workpiece body, and a holding member which is arranged at least at a part of an outer circumferential portion of the workpiece body and directly contacts with at least a part of the outer circumferential portion.

A high-speed transportation system, the system including at least one transportation path having at least one track, at least one transportation vehicle configured for travel along the at least one transportation path, a propulsion system adapted to propel the at least one transportation vehicle along the at least one transportation path; and a levitation system adapted to levitate the transportation vehicle along the at least one transportation path. The at least one transportation vehicle additionally comprises wheels for at least intermittently supporting the transportation vehicle on the at least one track.

One steering column assembly includes a jacket, a bearing, and a steering spindle rotatably supported by the bearing and at least partially extending inside the jacket. The spindle includes a hollow outer tube and a hollow inner tube. The outer tube has lengthening and attachment sections, and the attachment section has transition and connection portions. The lengthening section adjoins the attachment section at an end of the transition portion, and the transition portion is between the lengthening section and the connection portion. The lengthening section has first and second portions, with the second portion being between the first and transition portions, and the outer tube terminates at an end of the connection portion. The inner tube is press-fit into the outer tube, and an end of the inner tube is adjacent the transition portion end. The inner tube does not extend into either the attachment section or the first portion.

One steering column assembly includes a jacket, a bearing, and a steering spindle rotatably supported by the bearing and at least partially extending inside the jacket. The spindle includes a hollow outer tube and a hollow inner tube. The outer tube has lengthening and attachment sections, and the attachment section has transition and connection portions. The lengthening section adjoins the attachment section at an end of the transition portion, and the transition portion is between the lengthening section and the connection portion. The lengthening section has first and second portions, with the second portion being between the first and transition portions, and the outer tube terminates at an end of the connection portion. The inner tube is press-fit into the outer tube, and an end of the inner tube is adjacent the transition portion end. The inner tube does not extend into either the attachment section or the first portion.

Shrink-fitting device for clamping and unclamping tools that have a tool shank, having a tool receptacle which has a sleeve part that is open at its free end and is made of electrically conductive material, for receiving the tool shank in a frictional manner, and having an induction coil that encloses the sleeve part of the tool receptacle, is able to be subjected to a high-frequency alternating current and is configured as a ring coil or a cylindrical coil, for heating the sleeve part, wherein the induction coil bears, on its outer circumference, a first casing made of magnetically conductive and electrically non-conductive material, and the device comprises power semiconductor components for producing an alternating current feeding the induction coil, and an induction coil housing that preferably consists of insulating material, wherein the induction coil and its first casing are surrounded at the outer circumference by a second casing which consists of magnetically non-conductive material and electrically conductive material and is designed such that a stray field that occurs in the vicinity thereof generates eddy currents in the second casing and as a result the stray field is weakened, and in that at least the power semiconductor components are accommodated together with the induction coil in an induction coil housing which encloses the induction coil, the first and second casing thereof, and the power semiconductor components, at least around the circumference of the induction coil.

A method of installing a heat shrink cover around a component includes providing the heat shrink cover having an inner sleeve and an outer sleeve, the inner sleeve is a heat shrink sleeve, and attaching an electrical heating system to an outer surface of the outer sleeve. The inner sleeve and the outer sleeve are arranged around the component, with the outer sleeve at least partially encompassing the inner sleeve. The electrical heating system is energized to heat-recover the inner sleeve.

Aspects of the disclosure relate to processing sliding mechanisms. For instance, an assembly including a first component having a first sliding mechanism may be heated to a first minimum temperature for a first minimum period of time. Thereafter, a second component is pressed onto the assembly a first time such that the second component contacts the first sliding mechanism. Thereafter, the second component and the assembly may be subjected to a below-freezing temperature for a second minimum period of time. Thereafter, the second component may be separated from the assembly. The first sliding mechanism may be rotated relative to the first component. Thereafter, the second component may be pressed onto the assembly a second time such that the second component contacts the first sliding mechanism. Thereafter, the first component and the assembly may be heated to a second minimum temperature for a third minimum period of time.

A method for jointing elements, each having a cutout, on a shaft by a device for producing a control shaft, comprises disposing the elements vertically above one another, aligned, and fixed. The method also comprises pushing the shaft in vertically from above though the cutouts of the elements by a traversable guide carriage of the device and displacing by a pneumatic piston of the device the traversable guide carriage and the shaft attached thereto until a maximum first press-in force is reached. The method further comprises displacing by at least two spindles of an electric spindle drive of the device the traversable guide carriage and the shaft when the maximum first press-in force is exceeded.

Provided is a rotation drive device, which has a driving-force transmission mechanism configured such that a drive transmission member provided on a driving shaft and a disk-shaped driven member attached to a main shaft are directly or indirectly engaged with each other and which is further configured such that an increase in diameter of the driven member due to thermal expansion can be suppressed as much as possible. The driven member includes an inner ring attached to the main shaft, and an outer ring attached to the inner ring by shrinkage fit and having an engaging groove formed to be opened on an outer circumferential surface thereof. The inner ring is formed by a low thermal expansion member, which is an alloy having a thermal expansion coefficient of 5×10.sup.−6/K or less. The outer ring is formed of a hardenable iron-based material.

A method of manufacturing a universal joint includes: temporarily assembling a bearing, which supports a shaft portion of a joint spider such that the shaft portion is rotatable, with respect to a through-hole and the shaft portion by press-fitting the bearing to a first position in the through-hole of a yoke; and clinching, after the bearing is temporarily assembled, a portion of the yoke around the through-hole, and pressing the bearing deeper into the through-hole with a clinched portion formed by the clinching to press-fit the bearing to a second position located deeper than the first position in the through-hole.