Gap eliminating transmission case

Abstract

The invention provides an anti-backlash transmission box which is characterized in that: the middle part of a first output transmission shaft is connected with a first helical gear which is screwed to the right side; the middle part of a second output transmission shaft is connected with a second helical gear which is screwed to the left side; a gear transmission shaft is provided with a sixth helical gear and a fourth helical gear; a fifth helical gear is connected with the fourth helical gear; a motor and a planetary reducing gearbox are arranged on a box body 1; a motor output shaft is connected with a third helical gear; the third helical gear is engaged with the fourth helical gear and the fifth helical gear; the gear part of the helical gear transmission shaft is engaged with the second helical gear; a sixth helical gear is engaged with the first helical gear; the anti-backlash transmission box has simple structure and reasonably arranges the positions of the transmission gears, leads the internal structure of the anti-backlash transmission box to be compact, and saves the space; simultaneously, by reasonably adopting the anti-backlash mechanism, the anti-backlash transmission box has better reverse clearance, has good positioning precision and repeated positioning precision when being transmitted to the X-axis of the numerical control gantry milling processing center, and ensures the processing precision of the numerical control gantry milling processing center.

Description

technical field [0001] The invention relates to an anti-backlash transmission box, in particular to an anti-backlash transmission box suitable for X-axis transmission of a large mobile machining center such as a gantry milling machining center, and belongs to the technical field of mechanical structures. Background technique [0002] With the rapid development of my country's machinery industry, especially the development of heavy industry, there is an increasing demand for large-scale metal processing equipment such as CNC gantry milling machining centers; at the same time, higher requirements are put forward for the technical parameters of the equipment. For large-scale equipment such as CNC gantry milling machining centers, the stroke specification is also relatively large (the X-axis stroke is usually more than 8 meters). Generally, the long-stroke drive adopts ball screw or rack drive. These two methods have their own advantages and disadvantages. In the ball screw driv...

AI Technical Summary

Problems solved by technology

If the transmission gear in the X-axis gear transmission box is not engaged with anti-backlash; the gear of the output drive shaft and the rack are not engaged with anti-backlash, the gap will accumulate into the backlash of the X-axis transmission, which will directly affect the positioning of the X-axis of the CNC gantry milling machining center Accuracy and repeated positioning accuracy make the accuracy of the CNC gantry milling machining center fail to meet the requirements

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