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...

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