Qingdao Vanhon Machinery Technology Co.,Ltd.

Industry News
How to reduce the clearance of precision rack and pinion transmission
Nov 16, 2021

          With the use of machinery and equipment, our demand for precision gears and racks has gradually increased, and precision gears and racks also have good market development opportunities. Different mechanical equipment has different selection criteria for precision gears and racks. When a good precision gear rack is in transmission, the gap is relatively small, so that a good transmission effect can always be achieved. So how do we reduce the clearance of precision rack and pinion transmission?

                                                       

How to reduce the clearance of precision rack and pinion transmission(图1)


           Large-scale CNC machine tools usually use rack and pinion to realize transmission. When the transmission force is small, a double thin-plate gear structure similar to cylindrical gear transmission can be used, and the gap can be reduced by displacing the gears. When the transmission is large, a double-thick plate gear transmission structure is usually adopted. The transmission movement is input by shaft 2 and transmitted to shaft 1 and shaft 3 through two pairs of helical gears, and then the spur gear 4 and spur gear 5 drive the rack to move the worktable. The spiral directions of the two helical gears on the top of the shaft 2 are opposite. If the axial force f is applied to the shaft 2 through the spring to make the helical gear move slightly in the axial direction, the shaft 1 and the shaft 3 rotate slightly in the opposite direction, so that the pinions 4 and 5 are respectively close to the two sides of the rack. Surface, thereby reducing the gap. The stability of the rack and pinion in transmission is quite stable in the rack and pinion, so it is a relatively stable horizontal transmission in similar processes, and it also has its own characteristics.

          The method of reducing the transmission gap of the precision gear rack needs to be dealt with according to different situations. Regardless of the size of the equipment, precision gears play a particularly important role. We need the market to check the running status of gears, and severely damaged precision gears need to be replaced in time. Otherwise it will affect the use of the equipment, and gears play an important role in the operation of the equipment.




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