SU364366A1 - DRIVE CUTS MILL COLD MOUNT PIPES - Google Patents

Description

The invention relates to the field of pipe production and improves the design of the drive stand or the main drive of the cold rolling mill.

The known drive of the stand of the cold rolling mill tube includes an axial crank mechanism with two parallel branches, the crank gears of which are connected to end gears that receive rotation from a central wheel driven through gear pairs from an electric motor.

The disadvantage of such a drive is the impossibility of equal distribution of torque from the engine between the crank wheels, and, consequently, the connecting rods of the drive mechanism due to inaccuracies in the manufacture and installation of parts and drive assemblies and uneven wear of its hinge and gear pairs.

In order to reduce the unevenness of the load between the parallel branches of the crank mechanism, a differential is placed inside the central wheel of the proposed drive, which connects the wheel with the end gears.

FIG. 1 depicts the described cage drive, plan view; in fig. 2 is a section along L-A in FIG. one; in fig. 3 is a section along BB in FIG. one.

2

The drive comprises a two-branch crank mechanism connected with a working cage / axial crank mechanism consisting of crankshafts 2 and crank gears 3. The crank gears interact with the end gears 4 placed on the right-hand gear composed of two gears. x halves of the shaft 5. The terminal N1cars receive rotation from the central wheel 6,

which is located on the same nromel weft shaft and through gear gear 7, bevel gear 8, clutch 9 is connected to electric motor 10.

The central gear wheel, composite, is made of a disk with a hub // and a gear ring 12, rigidly fixed relative to each other with the help of dowels 13. Inside the central gear there is a differential, which consists of conical

gears 14 and shafts 15 mounted on bearing supports 16, and connects the wheel with end gears.

The hub of the central wheel rests halfway through the weft shaft through the bearings 17, located behind the bevel gears of the differential.

During operation, the movement from the electric motor 10 through the coupling 9 and the bevel gear 8 is communicated to a fast ty shaft. Further

through gear gear 7, chain wheel 6 and end gears 4, the rotation is transmitted by crank gear gear 3 and converted through rods 2 into reciprocating post work movement of the working cage.

Due to the fact that the intermediate shaft -5 consists of two halves, on the inner necks of which are located, bevel gears 14, which are meshed with similar gears located on the shafts J5, the transmission of torque from the central wheel 6 between two gear pairs of end gears gears 4 and crank gears 3 can occur only when both these gear pairs are engaged, as in this case the intermediate shaft 5 is rigid and can transmit torque from the central wheel 6 es pinion gear crank 4 m3.

When a gap appears in one of these gear pairs, it will always be selected, since in this case an additional degree of freedom appears in the intermediate shaft 5 due to its constructive implementation. If, for example, the gap is wilted in the right-toothed pair 5-4, then the left half of the intermediate shaft 5 is clamped,

and its conical gear M is fixed. Under the action of the moment applied to the crown of the central wheel 6, it tries to rotate relative to the fixed gear 14 together with the right half of the intermediate shaft 5 and will rotate until this gap is completely selected. The distance of the intermediate shaft 5 rotates as a whole and distributes the moment between the end gears 4. Since about half (right and left) of the intermediate shaft is absolutely symmetrical, the moment is distributed equally.

Subject invention

The drive of the stand of the cold rolling mill tube includes a parallel-crank mechanism, the crank gears of which are associated with end gears that receive rotation from the driving central wheel, characterized in that, in order to reduce the unevenness of the load between the parallel branches, the crank shaft - a crank mechanism; a differential is located inside the central wheel, which connects the wheel with end gears.

  /

 .

FIG.

.

i3

P