Pin roller screw nut and lead screw pair

Abstract

The invention discloses a pin roller screw nut and lead screw pair which is a two-stage pre-tightening mesh rolling counter-rotating transmission mechanism. The screw nut and lead screw pair comprisesa first-stage central lead screw and second-stage wire rollers, the screw nut and lead screw pair further comprises radial pre-tightening bearing seats, a spacer sleeve and a bolt, the wire rollers are uniformly distributed around the central screw rod in the circumferential direction, the surrounding threads in the middles of the wire rollers and threads of the central screw rod are in pre-tightening mesh rolling counter-rotation, the spacer sleeve is bolted and clamped between the radial pre-tightening bearing seats through bolts, and the two-stage pre-tightening mesh rolling counter-rotation transmission mechanism for meshing rolling of the wire rollers around the central screw rod in the bearing groove is achieved. The pin roller screw nut and lead screw pair is reasonable in structural design, simple and easy to process, low in cost, stable and easy to maintain, and capable of directly lifting transmission efficiency due to the fact that the threads of the central screw rod and the threads of the wire rollers are in two-stage pre-tightening mesh rolling counter-rotation transmission; a pre-tightening telescopic groove is formed in the periphery of the bearing groove, so thatthe bearing groove is provided with a controllable space for pre-tightening and retracting in the radial direction, so that the stability of the two-stage pre-tightening mesh rolling counter-rotationtransmission between the central screw rod and the wire rollers is further fully ensured.

Description

technical field [0001] The invention belongs to the technical field of mechanical transmission components, and specifically relates to a roller wire that converts rotational motion into linear motion, has a simple and stable transmission structure, and is low in cost, and realizes two-stage pre-tightening gearing and rolling counter-rotation transmission. Female screw pair. Background technique [0002] At present, all planetary roller screw mechanisms include a screw, a screw, and a nut. It is a three-stage transmission mechanism composed of an internally threaded nut on the outside of the screw with equidistant toothing on the outer cover of the screw. Its structural design is extremely complicated. , processing is extremely difficult, and the cost is extremely high. [0003] The complexity of the structural design is reflected in the mutual meshing and nesting of the first-stage screw, the second-stage thread column, and the third-stage nut of the three-stage transmissio...

AI Technical Summary

Problems solved by technology

[0005] In view of the above problems, the present invention provides a roller screw mother screw pair, the purpose of which is to solve the problem that the existing screw drive mechanism is a three-stage drive mechanism, the structure design is complicated, the processing is extremely difficult, and the cost is extremely high, so as to realize a roller screw. The column screw female screw pair is a two-stage pre-tightened toothed rolling counter-rotation transmission mechanism, which makes the structural design simpler and more reasonable, the transmission efficiency is improved, the cost is low, and the processing is easier

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