DRIVE SCREW ASSEMBLY AND LANDING GEAR ASSEMBLY WITH SAME
First Claim
Patent Images
1. A landing gear assembly for an aircraft comprising:
- a leg having a first end rotatably coupled to the aircraft for rotating between retracted and extended positions;
a link assembly comprising multiple rotatably coupled links, with one of the links rotatably coupled to the aircraft and another of the links rotatably coupled to the leg; and
a drive screw assembly comprising;
a casing coupled to the aircraft and having an interior with an open end and having at least one detent;
a piston having at least a portion received within the interior and slidably coupled to the casing for reciprocation relative to the casing and another portion mounted to the link assembly;
a drive screw provided within the casing and extending into the piston;
a nut assembly threadably coupled on the drive screw and having at least one moveable segment receivable within the detent and a cam operably coupled to the at least one moveable segment to move the segment into the detent, and the cam having a key; and
a screw cap rotationally mounting an end of the drive screw proximate the open end and having a keyway for receiving the key;
wherein upon the rotation of the drive screw, the nut assembly traverses the drive screw where it contacts the piston to move the leg from the retracted position to the extended position and when the key engages the keyway, the cam moves the moveable segment into the detent, which locks the piston relative to the casing to fix the leg in the extended position.
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Accused Products
Abstract
A landing gear assembly includes a leg that may be rotated between retracted and extended positions, a link assembly, and a drive screw assembly. The drive screw assembly includes a casing, a piston slidably coupled to the casing for reciprocation relative to the casing and a portion mounted to the link assembly and where the drive screw assembly is capable of locking and unlocking.
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Citations
20 Claims
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1. A landing gear assembly for an aircraft comprising:
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a leg having a first end rotatably coupled to the aircraft for rotating between retracted and extended positions; a link assembly comprising multiple rotatably coupled links, with one of the links rotatably coupled to the aircraft and another of the links rotatably coupled to the leg; and a drive screw assembly comprising; a casing coupled to the aircraft and having an interior with an open end and having at least one detent; a piston having at least a portion received within the interior and slidably coupled to the casing for reciprocation relative to the casing and another portion mounted to the link assembly; a drive screw provided within the casing and extending into the piston; a nut assembly threadably coupled on the drive screw and having at least one moveable segment receivable within the detent and a cam operably coupled to the at least one moveable segment to move the segment into the detent, and the cam having a key; and a screw cap rotationally mounting an end of the drive screw proximate the open end and having a keyway for receiving the key; wherein upon the rotation of the drive screw, the nut assembly traverses the drive screw where it contacts the piston to move the leg from the retracted position to the extended position and when the key engages the keyway, the cam moves the moveable segment into the detent, which locks the piston relative to the casing to fix the leg in the extended position. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A drive screw assembly comprising:
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a casing having one end for coupling to a structure and having an interior with an open end and having at least one detent; a piston having at least a portion received within the interior and slidably coupled to the casing for reciprocation relative to the casing and another portion for coupling to a moveable portion; a drive screw provided within the casing and extending into the piston; a nut assembly threadably coupled on the drive screw and having at least one moveable segment receivable within the detent and a cam operably coupled to the at least one moveable segment to move the at least one moveable segment into the detent, and the cam having a key; and a screw cap rotationally mounting an end of the drive screw proximate the open end and having a keyway for receiving the key; wherein upon rotation of the drive screw, the nut assembly traverses the drive screw to move the piston out of the casing ultimately causing the key to engage the keyway, which causes the cam to move the moveable segment into the detent, which locks the piston relative to the casing. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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Specification