A power transmission shaft comprises a shaft unit interposed between first and second shafts; an engaged portion provided on one end of the second shaft and having an annular stepped part provided between a smaller diameter portion and a larger diameter portion; and an engaging portion provided on one end of the shaft unit and joinable with the engaged portion to rotate together about a common rotation axis, wherein the engaging portion comprises a cylindrical base portion that rotates together with the shaft unit, an elastically shrinkable cylindrical portion that is provided on one axial end of the cylindrical base portion to project toward the engaged portion and catching pawls that are provided by the elastically shrinkable cylindrical portion and latchingly engageable with the annular stepped part when the engaged portion and the engaging portion are coaxially arranged and joined with each other.

A power transmission shaft comprises a shaft unit interposed between first and second shafts; an engaged portion provided on one end of the second shaft and having an annular stepped part provided between a smaller diameter portion and a larger diameter portion; and an engaging portion provided on one end of the shaft unit and joinable with the engaged portion to rotate together about a common rotation axis, wherein the engaging portion comprises a cylindrical base portion that rotates together with the shaft unit, an elastically shrinkable cylindrical portion that is provided on one axial end of the cylindrical base portion to project toward the engaged portion and catching pawls that are provided by the elastically shrinkable cylindrical portion and latchingly engageable with the annular stepped part when the engaged portion and the engaging portion are coaxially arranged and joined with each other.

A dual bushing and hub assembly for mounting sheaves, sprockets, gears, couplings and similar machine elements on a shaft, wherein two types of tapered bushings are used, the bushings are used within a single hub which is compatible with both bushings. The dual bushing locking screws for tightening the bushings securely in place on the shaft and in the hub bore are both accessible from the same side of the hub.

A disclosed submersible pump apparatus includes a three-dimensional frame, a pump housing, a drive shaft, an impeller, and first and second motors. The impeller is mounted on the driveshaft within the pump housing and is driven by one or both of the motors. The first motor is connected to a first end of the drive shaft and the second motor connected a second end of the drive shaft. The first and second motors are hydraulic motors and in a first configuration, the first and second motors are configured to cooperatively rotate the drive shaft with hydraulic fluid supplied to and removed from the first and second motors using a parallel fluidic connection. In a second configuration, only one of the motors has a drive gear and drives the drive shaft while the second motor does not have a drive gear and acts as a frictionless bearing supporting the drive shaft.

The invention relates to a connecting arrangement for connecting a shaft to a component. A tapered outer surface of an inner ring and a tapered inner surface of an outer ring are configured in a manner corresponding to each other. The outer ring surrounds the inner ring. A union nut surrounds the outer ring and the threaded piece. The union nut has an internal thread and the threaded piece has an external thread, wherein the internal and the external threads are configured in a manner corresponding to each other.

In the case of an arrangement with a hollow shaft, an input shaft partially contained in the hollow shaft, and a clamping device, the hollow shaft is connected to the input shaft by forces which are directed radially to the hollow shaft being introduced into the hollow shaft at at least three discrete introduction points arranged along a circumference of the hollow shaft.

In the case of an arrangement with a hollow shaft, an input shaft partially contained in the hollow shaft, and a clamping device, the hollow shaft is connected to the input shaft by forces which are directed radially to the hollow shaft being introduced into the hollow shaft at at least three discrete introduction points arranged along a circumference of the hollow shaft.