1. Mine car wheel pair
First, the mine car runs smoothly, when one of the four wheels on the horizontal track is not in contact with the surface of the track, the gap is not more than 3mm. Second, Wheels shall not have cracks, rim wear allowance is not less than 13mm, 1t and the following mine car is not less than 6mm. Third, Wheels are regularly oiled and rotate flexibly. Wheel end face oscillation: rolling bearings not more than 2mm; tapered roller bearings not more than 3mm.
2. The tram connection device
First, the safety coefficient of the beam, bumper and pin of the mine car is not less than 10; the wear and tear of the connecting buckles and bolts shall not exceed 15% of the original size. The bending of chain rings and pins shall not exceed 10% of the diameter of chains and pins. Second, cast steel bumper without cracks, spring without fracture or permanent deformation. The expansion length of elastic bumper is 10-30mm.
3. The mine car box and bottom beam
First, no hole in the carriage, the depth of each bump is not more than 50mm, the length of the crack is not more than 100mm, and the diagonal length of the upper opening is not more than 50mm. Second, the bottom beam shall not have open welding and cracks, the head rivets shall not be loose, other parts of the rivets, the number of loose bolts does not exceed 10% of the total.
4. The bottom of the unloader
First, he bottom of the carriage is closely combined with the carriage. Second, the bracket wheel group is flat and straight, the bracket wheel rotation is flexible, the height difference between two neighboring support wheels is not more than 2mm, the height difference between neighboring bracket wheels is not more than 2mm, and there should be 3 neighboring bracket wheels in a straight line.
