A connecting arrangement for connecting two parts (1, 5) by way of two connected sockets (2, 4), wherein parts and sockets have rotationally symmetrical engagement regions, not exceeding 180°, about engagement axes (11, 15 or 12, 14), which engagement regions are complementary between one part and one socket each, wherein one socket is rotated into one part each, and the complementary engagement regions hold the part on its socket so as to be pivotable about the respective aligned engagement axes and so as to withstand tensions in the direction of a zenith axis of the parts (10 or 16), and in that, after the parts and socket pairs are rotated into engagement and positioned with respect to each other, the sockets (2, 4) are connected to each other, the connection being rotationally and tensionally stiff with respect to the direction of the zenith axes.

A splined coupling comprises a radially inner shaft and a radially outer shaft having a cavity for receiving the inner shaft. First splines are provided on a radially outwardly facing surface of the inner shaft. Second splines are provided on a radially inwardly facing surface of the cavity of the outer shaft. The first splines are slidably engaged with the second splines. At least one biasing element, for example a diaphragm is arranged to act between the radially inner and radially outer shafts for locating the first splines in a desired axial position relative to the second splines and to provide a biasing force resisting the axial movement of the first splines relative to the second splines upon relative axial movement of the inner and outer shafts.

A motor drive unit, in which an output end of a motor drive system using an electric motor as a power source and a rotator rotatably supported by a bearing unit are arranged side by side in an axial direction, and the output end of the motor drive system and the rotator are drivingly coupled in a relatively displaceable manner by a coupling member in which a plurality of couplers spaced apart in an axial direction are set. The bearing unit of the rotator is arranged such that a center of displacement of the rotator defined by the bearing unit is located between an arbitrary pair of couplers among the couplers.

A torque transmitting coupling for an electric submersible pump equipment string. A torque transmitting coupling system includes a first adapter including a first inner diameter mated to a first shaft rotatable about a first axis of rotation, and a first splined outer diameter mated to a splined coupling inner surface, a second adapter including a second inner diameter mated to a second shaft rotatable about a second axis of rotation, and a second splined outer diameter mated to the splined coupling inner surface, the first and second splined outer diameter at least partially spherical such that when the first axis of rotation moves with respect to the second axis of rotation, at least one of the splined outer diameters rock along the coupling inner surface.

Coupling (1) with a bellows-protected interlocking driving connection (2), at least comprising a hub (3) and a sleeve (4), wherein the driving connection (2) is arranged between the hub (3) and sleeve (4), wherein the driving connection (2) is protected by a bellows (5), wherein the bellows (5) is located in a recess (6) of the hub (3) and is fastened at one end to the sleeve end region (8) and at the other end opposite the sleeve end region (8) to the hub (3), wherein the annular recess (6) is bounded at least by an annular hub inner surface (16) directed towards the driving connection (2) and by an opposite hub outer surface (9) formed with respect to the end side (11) of the hub (3), wherein there is an annular gap (10) between the sleeve end region (8) and the hub outer surface (9) of the recess (6). The intention is to avoid dust and dirt penetrating the bellows section as wave troughs and face the hub outer surface, in the recess present with the hub in region bellows and hub outer surface.

A universal joint (U-joint) assembly transmits torque from a drive component to a driven component across an articulating joint. The U-joint assembly includes male and female U-joint members, a central ball joint, and a retaining device configured to secure the assembly in an assembled configuration. The female U-joint member includes a cavity extending into a receptacle end thereof. The cavity terminates in a circular receptacle and includes a plurality of rectangular channels extending radially outward from the cavity at equal intervals, each channel defined by three planar drive surfaces. The male U-joint member has a drive end with a plurality of corresponding rectangular extensions protruding from an outer periphery of the drive end, each extension including a plurality of axial angular surfaces. When assembled, each of the angular surfaces of the drive end opposes a corresponding one of the drive surfaces of the cavity. Other embodiments are also disclosed.

A corner module of a vehicle includes: a suspension configured to be coupled to a vehicle body; a case configured to be coupled to the suspension and configured to be to be supported on the vehicle body via the suspension; an in-wheel motor disposed inside the case; a steering motor disposed inside the case; a first power transmission mechanism configured to connect the in-wheel motor and a vehicle wheel and configured to transmit a rotating force of the in-wheel motor to the vehicle wheel to drive the vehicle wheel; and a second power transmission mechanism configured to connect the steering motor and the vehicle wheel and configured to transmit a rotating force of the steering motor to the vehicle wheel to steer the vehicle wheel.

In a propeller shaft, a crowning portion of a male spline portion is provided in a predetermined range including a front end portion in an axial direction, and a tooth tip surface is shaped in such a manner that a tooth thickness thereof gradually increases from the front end portion toward an intermediate portion of the male spline portion in the axial direction.

A top drive for well operations having a gearbox, a traction motor connected to the gearbox so that a motor shaft of the traction motor extends into the gearbox, a quill extending into the gearbox, a gear train positioned within the gearbox and mechanically connected between the traction motor shaft and the quill, and a connector positioned in the gear train, wherein in a coupled configuration the connector communicates torque through the gear train, and wherein in a decoupled configuration the connector does not communicate torque through the gear train. A method for operating a top drive by applying a first torque to a quill with two traction motors, disconnecting one of the traction motors from the quill, and applying a second torque less than 50% of the first torque to the quill with the non-disconnected traction motor.

Surgical tools having a two degree-of-freedom wrist, wrist articulation by linked tension members, mechanisms for transmitting torque through an angle, and minimally invasive surgical tools incorporating these features are disclosed. An elongate intermediate wrist member is pivotally coupled with a distal end of an instrument shaft so as to rotate about a first axis transverse to the shaft, and an end effector body is pivotally coupled with the intermediate member so as to rotate about a second axis that is transverse to the first axis. Linked tension members interact with attachment features to articulate the wrist. A torque-transmitting mechanism includes a coupling member, coupling pins, a drive shaft, and a driven shaft. The drive shaft is coupled with the driven shaft so as to control the relative orientations of the drive shaft, the coupling member, and the driven shaft.