Self-Centering, Anti-Backlash Leadscrew Unit
Original Publication Date: 1983-Sep-01
Included in the Prior Art Database: 2005-Feb-07
A cylindrical leadscrew nut 1, preferably made from plastic material, is provided on its inside with elongated flexible arms 2, 3 emanating from the center part 4 of nut 1, extending towards its ends 5, 6 and being slightly inclined in the direction to the axis 7 of nut 1. The arms 2, 3 extend in alternate fashion to the nut ends 5, 6 - arms 2 toward end 5, arms 3 toward end 6 - and carry tabs 8 on their outer extremities. They are threaded to cooperate and be driven by a leadscrew (not shown). Fig. 1 depicts in an end view nut 1 with four arms 2 pointing into the drawing plane and also four arms 3 pointing out of the drawing plane toward nut end 6. The alternating arms are provided at equal circumferential positions on the inside of nut 1. Fig. 2 depicts a sectional view along line II-II of Fig.