1. Safety requirements of forklift working device
1. There must be no deformation of the gantry and the welding seam is unwelded. The rolling gap between the inner and outer gantry should be adjusted reasonably, and should not be greater than l. 5mm, the rotation of the roller should be flexible, and the roller and the shaft should be free of cracks and defects. The wear of the wheel groove must not be greater than 10% of the original size.
2. The tension of the two lifting chains should be even without twisting and deformation, the ends should be connected firmly, the pitch of the chain should not exceed 4% of the original length, otherwise the chain should be replaced. The sprocket rotation should be flexible.
3. The fork frame must not be severely deformed, and the weld seam is not welded. The surface of the fork must be free of cracks and welding seams. The root angle of the fork shall not be greater than 93°, and the thickness shall not be less than 90% of the original size. The height difference between the left and right fork tips must not exceed 3% of the length of the horizontal section of the fork. Fork positioning should be possible
Rely, the supporting surface and positioning surface of the fork hook must not have obvious defects, the cooperation clearance between the fork and the fork frame should not be too large, and the movement should be smooth.
4. The connection part of the lifting cylinder and the gantry should be firm, the hinge connection of the tilting cylinder and the gantry, and the frame should be firm and flexible, and the cooperation clearance should not be too large. The oil cylinder should be well sealed, without cracks, and work smoothly. Under the rated load, the self-sinking amount of the lOmin mast is not greater than 20mm, and the inclination angle is not greater than 0.5°. The lifting speed at full load shall not be less than half of the standard value.
5. The overhead guard and the shelf must be complete and effective.
Second, the safety requirements of the forklift hydraulic system
1. Night pressure system pipeline joint is reliable, no leakage, no rubbing with other mechanical parts, rubber hose must not have aging, deterioration phenomenon.
2. The transmission components in the hydraulic system should not crawl, stagnate and obvious impulse within the rated load and rated speed range.
3. Multi-directional reversing valve housing is free of cracks and leakage; the working performance should be good and reliable; the safety valve should be sensitive and should be fully opened when overloaded by 25%; the nuts of adjusting bolts should be complete and strong. The operating handle is positioned accurately and reliably, and must not be displaced due to vibration.
4. Load curve and hydraulic system nameplate should be complete and clear.
