초록 ▼

A torque limiting decoupler shaft transmits driving torque in a first sense without torque limiting action. However, torque applied to the shaft in a reverse sense opposite the driving torque results in an axial separating force between two portions of the decoupler shaft. When the reverse torque re

A torque limiting decoupler shaft transmits driving torque in a first sense without torque limiting action. However, torque applied to the shaft in a reverse sense opposite the driving torque results in an axial separating force between two portions of the decoupler shaft. When the reverse torque reaches a certain level a frangible tensile bar member fractures to permit decoupling of the shaft portions. A component of the shaft prevents undesirable recoupling of the shaft portions while also insuring that the relatively rotating portions of the shaft do not flail. An air turbine starter includes such a decoupler shaft.

대표청구항 ▼

A decoupler shaft comprising: a first and a second axially adjacent elongate and coaxial shaft portions, each one of said shaft portions defining respective torque transmitting coupling means for inter-engaging with one of a respective driving mechanism and driven mechanism, said shaft portions also

A decoupler shaft comprising: a first and a second axially adjacent elongate and coaxial shaft portions, each one of said shaft portions defining respective torque transmitting coupling means for inter-engaging with one of a respective driving mechanism and driven mechanism, said shaft portions also each defining respective driving surfaces and ramp surfaces interengaging in a first relative position of said shaft portions and both extending radially, said driving surfaces of said shaft portions extending substantially axially to transmit driving torque in a first sense between said shaft portions, said ramp surfaces extending both axially and circumferentially to transmit reverse torque in a second sense opposite said first sense with a resulting axial separating force between said shaft portions, a frangible tensile bar member extending between said shaft portions to retain the latter in said first relative position in opposition to said separating force, upon said reverse torque reaching a certain level said tensile bar fracturing to allow said separating force to relatively move said shaft portions to a second spaced apart relative position wherein said driving and ramp surfaces do not interengage.