Leadscrew mechanical drive with differential leadscrew follower structure
AssigneeRaytheon Company
InventorGabor Devenyi
Life of this patent
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Abstract
A leadscrew mechanical drive includes a leadscrew having a leadscrew axis and a leadscrew thread with a nonzero leadscrew thread pitch, and a leadscrew follower structure engaged to the leadscrew. The leadscrew follower structure includes a threaded insert having an insert thread with a nonzero insert thread pitch different from the leadscrew thread pitch, which is threadably engaged to the leadscrew. The leadscrew follower structure further includes a bearing in which the threaded insert is received and which permits the threaded insert to rotate about the insert axis, a bearing support in which the bearing is received, and a preload structure which biases the insert thread against the leadscrew thread.
Claims21
A leadscrew mechanical drive comprising:
- a leadscrew having a leadscrew axis and a leadscrew thread with a nonzero leadscrew thread pitch;
- and
- a leadscrew follower structure engaged to the leadscrew, the leadscrew follower structure including
- a threaded insert having an insert thread with a nonzero insert thread pitch different from the leadscrew thread pitch, wherein the threaded insert is threadably engaged to the leadscrew thread,
- a bearing in which the threaded insert is received and which permits the threaded insert to rotate about an insert axis, wherein the insert axis is angularly rotated from the leadscrew axis,
- a bearing support in which the bearing is received, and
- a preload structure which biases the insert thread against the leadscrew thread, said preload structure further comprising a spring in the form of a dished washer that applies a preload force to the insert.
A leadscrew mechanical drive comprising:
- a leadscrew having a leadscrew axis and a leadscrew thread with a nonzero leadscrew thread pitch;
- and
- a leadscrew follower structure engaged to the leadscrew, wherein the leadscrew follower structure includes a first leadscrew follower and a second leadscrew follower, wherein the first leadscrew follower and the second leadscrew follower are substantially identical, and wherein each leadscrew follower includes
- a threaded insert having an insert thread with a nonzero insert thread pitch different from the leadscrew thread pitch, wherein the threaded insert is threadably engaged to the leadscrew thread,
- a bearing in which the threaded insert is received and which permits the threaded insert to rotate about an insert axis, wherein the insert axis is angularly rotated from the leadscrew axis,
- a bearing support in which the bearing is received, and
- a preload structure that biases each of the leadscrew followers against the leadscrew in opposite directions, said preload structure further comprising a spring in the form of a dished washer that applies a preload force to the insert.
Dependencies are inferred from the claim text.