How to adjust the construction lifts drive device back wheel?
After installation of construction hoist and fastening the rollers of hoist drive device and cages, the rack and pinion hoist can trial run. In order to make the elevator run smoothly and reduce the wearing of spareparts, users should adjust the clearance of drive device back wheel and back of racks.
The mathod of commissioning of lifts drive device back wheel is as follows,
Remove the wooden pads from the lifts cage bottom, let the lifts cage hangs over the mast, the lifts drive device back wheel can be adjusted. The back wheels axle are the eccentric, you can adjust the meshing clearance of the drive pinion and rack by adjusting the back wheels.
a) Adjust the drive device back wheel and the rack plane. The clearance with the back of rack is 0.5 mm. The meshing clearance of the drive pinions and the rack should be 0.15 ~ 0.3 mm.
b) Run the elevator up and down several times, then stop at the bottom, adjust the drive device back wheel again as per the above mentioned clearance. And then, try run and adjust again untill the elevator runs smoothly.
c) After adjusting the clearance of hoists drive device back wheel and rack preliminarily, it is necessary to adjust accurately and fasten the bolts once more, upon several times of total test running of the construction elevator.