Nut rotating ball screw pair transmission unit

Abstract

The invention discloses a nut rotating ball screw pair transmission unit which comprises fixed brackets, a servo motor, ball screw pairs, linear guide rails and a feeding beam, wherein the fixed brackets are symmetrically arranged on two ends of the feeding beam, the linear guide rails are arranged on the upper part of the fixed brackets, roller type slide blocks are arranged on the linear guide rails, the feeding beam is arranged on the roller type slide blocks, lead screw seat plates are arranged on the upper parts of the fixed brackets, ball lead screws are arranged on the lead screw seat plates through fixing devices, ball lead screw pair nuts are sleeved on the ball lead screws and are connected with nut seats, the nut seats are connected with the feeding beam, two ends of the feeding beam are connected with a servo motor bracket, and the servo motor is arranged on the servo motor bracket. The nut rotating ball screw pair transmission unit provided by the invention has a simple and compact structure, and is novel and special in design thought. A ball lead screw transmission system is used for replacing a gear-rack transmission mode in an overlong stroke feeding process, and the difficulty of poor feeding precision caused by axial and radial runout in an overlong distance conveying process is solved. High-speed feeding and returning of a plate are realized, and locating precision and repeated locating precision are ensured.

Description

technical field [0001] The invention relates to the technical field of ball screws, in particular to a nut-rotating ball screw auxiliary transmission unit for high-precision plate feeding under high-speed and heavy-load conditions in a flexible numerically controlled metal plate automatic shearing production line. Background technique [0002] In the flexible CNC sheet metal automatic shearing production line, the transmission process of ultra-long stroke sheet metal usually adopts gear and rack transmission. But this kind of transmission process is generally: servo motor drive - gear, rack drive - feeding beam (often fixedly connected with the gear) moves back and forth to realize the feeding positioning function. The rack is installed on the fixed frame, which is generally installed in sections and fixed with a pin shaft. This transmission method has the following disadvantages: 1. Poor positioning accuracy and repetitive positioning accuracy during the transmission proce...

AI Technical Summary

Problems solved by technology

This transmission method has the following disadvantages: 1. Poor positioning accuracy and repetitive positioning accuracy during the transmission process; 2. Low transmission speed; 3. High noise during the transmission process; 4. High processing costs for gears and racks; 5. Difficult rack installation , segmented seams are of poor quality

The ball screw with this structure is relatively difficult to process, and the length of the screw should not be too long, otherwise the stability will be poor, resulting in low transmission accuracy

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