초록 ▼

This invention relates to a resettable force limiting assembly of the ball and screw type employed in a flight control actuation system. The resettable force limiting assembly includes a force transmitting reciprocating output member drivingly carried by an actuating member mounted for rotation in a

This invention relates to a resettable force limiting assembly of the ball and screw type employed in a flight control actuation system. The resettable force limiting assembly includes a force transmitting reciprocating output member drivingly carried by an actuating member mounted for rotation in a housing. A reversible torque input is mechanically coupled to the actuating member to cause the output member to move in a direction dependent upon the direction of rotation of the input. A reciprocating reaction plate is secured for rotation with the actuating member. In operating cooperation with the reaction plate is a reaction plate engagement assembly that has elements secured against rotation to the housing. The elements are disposed on either side of the reaction plate. The elements have compression springs coupled thereto to resiliently separate the elements while allowing the elements to individually move towards and away from the reaction plate. The reaction plate, in turn, has springs resiliently positioning the reaction plate between a pair of force transmitting means in the form of snap rings secured to the actuating member whereby tension and compression forces above a predetermined value experienced by the output member result in the reaction plate being deflected into engagement with one of the reaction plate engagement elements depending upon the direction of the tension and compression forces experienced by the output member to thereby cause any additional input torque to be reacted into the housing. Reverse rotation of the input torque will result in the release of one of the reaction plate engagement elements to thereby reset the force limiting assembly.

대표청구항 ▼

A resettable force limiting assembly including in combination: a force transmitting reciprocating output member drivingly carried by an actuating member mounted for rotation in a housing, a reversible torque input mechanically coupled to said actuating member to cause said output member to move in a

A resettable force limiting assembly including in combination: a force transmitting reciprocating output member drivingly carried by an actuating member mounted for rotation in a housing, a reversible torque input mechanically coupled to said actuating member to cause said output member to move in a direction dependent upon the direction of rotation of said input, a reciprocating reaction plate secured for rotation with said actuating member, reaction plate engagement means having elements secured against rotation to said housing, said elements disposed on either side of said reaction plate, said elements having means coupled thereto to resiliently separate said elements while allowing said elements to individually move towards and away from said reaction plate, said reaction plate having means resiliently positioning said reaction plate between a pair of force transmitting means secured to said actuating member whereby tension and compression forces above a predetermined value experienced by said output member result in said reaction plate being deflected into engagement with one of said reaction plate engagement means elements depending upon the direction of said tension and compression forces to thereby cause any additional input torque to be reacted into said housing, reverse rotation of said input torque resulting in the release of a reaction plate engagement means element to thereby reset said force limiting assembly.