Separation and reunion nut and separation and reunion method thereof

Abstract

The invention discloses a separation and reunion nut and a separation and reunion method thereof. The separation and reunion nut comprises a guiding assembly, an operating ring, a nut assembly and an elastic assembly. A plurality of first concave arc-shaped surfaces and a plurality of second concave arc-shaped surfaces are arranged on an inner circumferential surface of the operating ring. The nut assembly comprises a plurality of part nuts, a third concave arc-shaped surface is arranged on the inner side wall of each part nut, and a convex arc-shaped surface is arranged on the outer side surface of the part nut. In a first working state, the first concave arc-shaped surfaces rotate to the radial outer sides of the part nuts separately, the convex arc-shaped surfaces lean against the first concave arc-shaped surfaces, and internal threads of the part nuts are engaged with external threads of a separated and reunited screw; in a second working state, the second concave arc-shaped surfaces rotate to the radial outer sides of the part nuts separately, the convex arc-shaped surfaces lean against the second concave arc-shaped surfaces, and internal threads of the part nuts are engaged with external threads of a separated and reunited screw. The separation and reunion nut is simple in structure, reliable to work and convenient to manufacture, mount and maintain.

Description

technical field [0001] The invention belongs to the technical field of mechanical transmission, and in particular relates to a clutch nut and a clutch method thereof. Background technique [0002] Screw drive can be divided into sliding screw, rolling screw and static pressure screw according to the friction properties of the screw pair. The present invention relates to sliding screw. Sliding screw drives consist of a screw and a nut and are used to convert rotary motion into linear motion while simultaneously transmitting motion and power. The screw transmission has the advantages of simple structure, convenient manufacture, reliable operation, stable transmission, small and precise linear movement with a large rotation angle, large axial force with a small torque, and self-locking. It is widely used in engineering. Especially in the application of large transmission ratio and high force increase, compared with other transmission schemes, screw transmission has incomparab...

AI Technical Summary

Problems solved by technology

In order to compensate the axial gap caused by the wear of the screw pair, or to eliminate or reduce the idle stroke during reverse transmission, the nut is often combined or split. In this case, the nut structure is more complicated and needs to be adjusted regularly

[0004] In the sliding screw drive, the nut and the helical surface of the screw are in surface contact, so the bearing capacity is large, and a large axial force can be obtained through a small torque, but in this case, the transmission ratio of the screw drive is usually very small That is to say, the ratio of the rotation angle of the nut relative to the screw to the axial movement of the nut relative to the screw is very large, which reduces the applicability of the sliding screw drive in some engineering applications, such as: the nut needs to move relative to the screw. Situations where a long distance has to be moved to reach the work position

In addition, the current traditional nuts cannot realize the engagement and separation of the screw rod according to the practical engineering requirements, and cannot control the axial force on the screw drive by disengaging the nut from the screw rod, which also reduces some engineering applications of the sliding screw drive. Suitability for the occasion

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