A shaft and hub connection assembly including a shaft and a hub each extending along and rotatable about an axis. One of the shaft and the hub defines a male connection portion, and the other of the shaft and the hub defines a female connection portion. The female connection portion has a radially inner surface comprised of a plurality of inside faces. The male connection portion has a radially outer surface comprised of a plurality of outside faces that nest within the inside faces. A plurality of outside transition regions are located between the outside faces in a circumferential direction and are blended at an outside radius. A plurality of inside transition regions are located between the inside faces of the female connection portion in the circumferential direction and are blended at an inside radius. A gap is provided between the outside and inside transition regions.

A joint arrangement including a drive member rotatable about a rotation axis, the drive member including a drive member press fit surface and a drive member shape lock structure; an attachment portion having an attachment thread; and a driven member including a driven member press fit surface, a driven member shape lock structure and a through hole; wherein the joint arrangement is configured such that the driven member can be rigidly connected to the drive member by means of a press fit between the drive member press fit surface and the driven member press fit surface by threadingly engaging the attachment thread with an attachment member passing through the through hole; and wherein the joint arrangement is configured such that a shape lock is provided between the drive member shape lock structure and the driven member shape lock structure when the driven member is connected to the drive member.

A fixing mechanism for a lifting device is provided. The lifting device includes a motor and a transmission shaft driven by the motor. The fixing mechanism includes a support body, a fixing assembly, a bearing, and a connection assembly. The fixing assembly includes a base plate fixed above the support body and a chamber disposed between the base plate and the support body. A bearing is arranged in the chamber and clamped between the support body and the base plate, and the transmission shaft passes through the bearing and protrudes from the base plate. The connection assembly is sleeved on the transmission shaft to together connect with the motor. Accordingly, power transmission efficiency may be improved, and vibration and noise generated during operation of the motor may be reduced.

A connection for connecting a first member with a second member, including a torque transmitting connection between the first member and the second member and an axial force transmitting connection between the first member and the second member, wherein the axial force transmitting connection includes a first exterior shoulder on the first member, a second exterior shoulder on the second member, a first collar having a first interior shoulder for engaging with the first exterior shoulder, a second collar having a second interior shoulder for engaging with the second exterior shoulder, and a collar connection between the first collar and the second collar for transmitting an axial force between the first collar and the second collar.

A bearing axle for photovoltaic modules includes at least two tubes, which each have a non-circular cross section at least in one end region. The non-circular cross sections of the at least two tubes are designed to correspond to each other such that a non-rotatable connection between at least one first and at least one second of the at least two tubes can be produced by way of inserting the at least one first of the at least two tubes into the at least one second of the at least two tubes. The bearing axle includes at least one separate connection means, which can be arranged intermediately between at least two tubes, and by way of which the particular at least two tubes are connectible non-rotatably to each other by form-lockingly coupling the at least one connection means to their free end regions with non-circular cross sections.

Provided is a main spindle mechanism for a machine tool such that even in the case of a small-diameter spindle, it is possible to increase the torque transmitted to a large cutter and it is possible to prevent contact to and collisions with the workpiece. The main spindle mechanism, which is provided to a machine tool that cuts a workpiece by means of a cutter, is characterized by having: a spindle that transmits torque from the drive power source of the machine tool and is formed with outer teeth at the outer periphery of the tip thereof; a large cutter arbor provided with a shaft for attaching the large cutter and a base at which outer teeth are formed having the same diameter as the outer teeth of the spindle; and a gear-coupling-shaped sleeve that is provided in a manner so as to cover the base of the large cutter arbor and the tip of the spindle, and at which are formed inner teeth that mesh with both the outer teeth of the spindle and the outer teeth of the large cutter arbor.

The present invention provides a rigid modular holding with axial and radial compensation for multiple and universal application of all machining processes, engineering, machine building, and construction fields where ever applicable for rotary and static systems. Design of modular holding includes male and female portions (401,301) of joining parts machined to the required shape and clearances to accommodate modular locking rigidly with face butting (407, 308). Radial and axial run out adjustments is controlled by the grub screws (307, 306) and run out compensation can be achieved within micron. An Area used for clamping and designed within the area of joining parts results reduction in material and processing cost. Since, the material is not protruding out from the surface of the joining parts, esthetically looks good and convenient for designing multiple applications as it is not possible at present.

A clutch includes a sun gear, an internal gear, planetary gears, a carrier, a first area, a second area, and a third area. The carrier has a through hole through which an output shaft extends. The first area is disposed on an inner wall of the carrier defining the through hole. The second area is disposed on an outer surface of the output shaft and is spline-fitted to the first area. The third area is disposed at a position that is on the outer surface of the output shaft and that is closer to the input shaft than the second area is to the input shaft. The third area has a shape that makes the third area rotatable while being fitted to the first area.

A driving tool is provided, including a tool set and a driving head. The tool set includes a connecting sleeve, an outer sleeve and at least one limitation member. The connecting sleeve has a receiving slot and a driving end. A plurality of protruding ribs extending axially and a plurality of recesses disposed between the protruding ribs are disposed on an inner wall of the receiving slot. The recesses are provided for a polygonal ball head to insert therein. A recessed portion and a protruding portion are disposed on the inner wall. The outer sleeve is slidable between a first position and a second position. When the outer sleeve is at the first position, the limitation member can restrict the polygonal ball head. When the outer sleeve is at the second position, the polygonal ball head is withdrawable from the receiving slot.

In an electric motor-pump assembly, two working diaphragms, each delimiting a working chamber, are cyclically driven by a crank drive via connecting rods. The crank drive includes eccentrics for each connecting rod, which are placed on an axial bearing journal in the extension of an output shaft of an electric motor. In order to ensure a rotationally fixed connection between the eccentrics and the bearing journal to be produced and in order to ensure an angularly precise position of the two eccentrics, each of the eccentrics is connected to the bearing journal by a positively locking engagement.