A coupling for allowing torque transmission between a first and second shaft, the coupling comprising: a cup-shaped portion provided at a first end of said first shaft and a first end of said second shaft being positioned within said cup-shaped portion; and said coupling further comprising a biasing means positioned between said first and second shafts, such that said biasing means is in contact with both of said first and second shafts. A shaft system can include the first coupling in combination with a third shaft and a second coupling that is provided between the third shaft and either a second end of said first shaft or a second end of said second shaft. The second coupling is identical to the first coupling.

A joint structure is used in connecting a first region and a second region of a robot. The joint structure includes a first member provided in the first region, a second member provided in the second region and having an engagement face that engages with the first member, and a coupling mechanism that causes a coupling force of the first member and the second member to be utilized to the full so that an engaged state of the first member and the second member is maintained. The coupling mechanism breaks the engaged state when a relative displacement of the first member and the second member from the engaged state exceeds a predetermined amount.

A joint structure is used in connecting a first region and a second region of a robot. The joint structure includes a first member provided in the first region, a second member provided in the second region and having an engagement face that engages with the first member, and a coupling mechanism that causes a coupling force of the first member and the second member to be utilized to the full so that an engaged state of the first member and the second member is maintained. The coupling mechanism breaks the engaged state when a relative displacement of the first member and the second member from the engaged state exceeds a predetermined amount.

A drive system 20, 20′ for rotating a wheel 11, 11′ of an aircraft landing gear 10, 10′, is disclosed having a drive element 24, 24′, a motor 21, 21′ operable to rotate the drive element, and a driven gear 25, 25′ adapted to be attached to the wheel. The drive system has a drive configuration in which the drive element is capable of meshing with the driven gear to drive the driven gear, wherein the drive system further comprises a transmission error measurement apparatus 30, 40, the apparatus configured to obtain, over time, measurement data of one or more characteristics of the drive system when in the drive configuration, the measurement data providing an indication of a transmission error between a torque commanded by the motor and a resulting torque at the driven gear. An aircraft 100 and a method of providing an indication of a transmission error in a drive system is disclosed.

The present disclosure is directed to a turbine engine (10) defining an axial direction and a radial direction. The turbine engine includes a fan or propeller assembly (14) comprising a gearbox; an engine core (20) comprising one or more rotors, wherein at least one of the rotors defines an axially extended annular hub; and a flexible coupling shaft (100) defining a first end and a second end along the axial direction, wherein the first end is connected to the engine core and the second end is connected to the gearbox, and further wherein the flexible coupling shaft extends from the one or more rotors to the gearbox in the axial direction and inward of the hub in the radial direction.

The present disclosure is directed to a turbine engine (10) defining an axial direction and a radial direction. The turbine engine includes a fan or propeller assembly (14) comprising a gearbox; an engine core (20) comprising one or more rotors, wherein at least one of the rotors defines an axially extended annular hub; and a flexible coupling shaft (100) defining a first end and a second end along the axial direction, wherein the first end is connected to the engine core and the second end is connected to the gearbox, and further wherein the flexible coupling shaft extends from the one or more rotors to the gearbox in the axial direction and inward of the hub in the radial direction.

A steering shaft assembly (10) for a motor vehicle is described, comprising a first shaft (20) and a second shaft (22), both of which are rotatable about a central axis (24). The second shaft (22) is a hollow shaft and a portion of the first shaft (20) is received so as to be axially displaceable inside the second shaft (22). The first shaft (20) and the second shaft (22) are also coupled in a torque-transmitting manner via two rotary coupling mechanisms (26, 28) separate from each other.

In some examples, an assembly includes a rotor drive key configured to be positioned over a wheel boss defined by a wheel. A drive key body defines a trough configured to receive the wheel boss. An inner surface of the drive key body is configured to establish a conforming contact with an outer profile of the wheel boss and oppose relative motion of the rotor drive key in a radial direction of the wheel. The rotor drive key includes a tab having a tab aperture configured to receive a fastener extending in an axial direction of the wheel and engaging the wheel boss.

In some examples, an assembly includes a rotor drive key configured to be positioned over a wheel boss defined by a wheel. A drive key body defines a trough configured to receive the wheel boss. An inner surface of the drive key body is configured to establish a conforming contact with an outer profile of the wheel boss and oppose relative motion of the rotor drive key in a radial direction of the wheel. The rotor drive key includes a tab having a tab aperture configured to receive a fastener extending in an axial direction of the wheel and engaging the wheel boss.

Method and system are provided for a quick connector for coupling conduits. The quick connector comprises a first piece including a radial slot and a first protrusion group, a second piece including a first slot group and a second slot group angled in a same direction, the first slot group is counterpart to the first protrusion group, and a third piece including a second protrusion group counterpart to the second slot group, where each slot of the first slot group faces a first side, and each slot of the second slot group faces an opposing, second side. In one example, the quick connector may include a locking mechanism and a feedback system.