CN217798083U - Finish rolling backing roll capable of preventing axial movement - Google Patents

Abstract

The utility model provides a can prevent finish rolling backing roll of axial float, finish rolling backing roll includes main shaft, backing roll, left bearing box, right bearing box, left snap ring and right snap ring, the backing roll is fixed on the main shaft, and the both sides of backing roll are fixed with left bearing box and right bearing box respectively, and left snap ring is fixed with left bearing box, and right snap ring is fixed with right bearing box. The utility model discloses it is fixed that two snap rings are fixed about utilizing, such structure and fixed mode are stable, firm. The fastening bolt and the fastening nut which can be replaced at any time are utilized to connect the tail ends of the two semicircular rings together, so that the phenomenon that the traditional snap ring is separated and falls off due to the damage of a built-in screw hole of the snap ring, the looseness phenomenon of a bearing box is avoided, and the steel scrap accident caused by box burning is reduced, thereby reducing the maintenance cost of equipment and ensuring the stable operation of production.

Description

Finish rolling backing roll capable of preventing axial movement

Technical Field

The utility model relates to a finish rolling backing roll for hot rolling belongs to metallurgical equipment technical field.

Background

The finish rolling backup roll is a key auxiliary device used in the steel rolling process and plays a supporting role for a finish rolling working roll and strip steel, so that the normal operation of the backup roll is very important. Bearing boxes are installed at two ends of the supporting roll, the bearing boxes are fixed through clamping rings, the diameters of the bearing boxes are matched with the diameters of the roll main shafts, the clamping rings are clamped on the roll shafts and fastened to the end faces of the bearing boxes through connecting bolts, the roll bearing boxes are locked, and the box body is prevented from moving.

The general snap ring is formed by splicing a right semicircular ring and a left semicircular ring, the head ends of the two are hinged together through a pin shaft, the tail end of the two is fixed through a fastening bolt, and the fastening bolt is deeply buried in a threaded hole, so that the problem is not easy to find, and the fastening is not easy to be carried out at any time. In the use of operating the computer, because the screw thread is impaired very easily and the connecting bolt space between snap ring and the bearing box terminal surface is restricted, intensity is less, and phenomena such as separation, drop often take place for right semicircle ring and left semicircle ring cause the bearing box not hard up, horizontal drunkenness, lead to bearing uneven wear, produce the problem of burning the case, and then cause the steel scrap accident, not only increased equipment maintenance cost, caused very big influence moreover for the steady operation of production.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to the drawback of prior art, provide a can prevent the finish rolling backing roll of axial float to reduce equipment cost of maintenance, guarantee the production steady operation.

The problem of the utility model is solved with following technical scheme:

the utility model provides a can prevent finish rolling backing roll of axial float, finish rolling backing roll includes main shaft, backing roll, left bearing box, right bearing box, left snap ring and right snap ring, the backing roll is fixed on the main shaft, and the both sides of backing roll are fixed with left bearing box and right bearing box respectively, and left snap ring is fixed with left bearing box, and right snap ring is fixed with right bearing box.

Above-mentioned finish rolling backing roll that can prevent axial float, the structure of left side snap ring and right snap ring is the same, and every snap ring includes right semicircle ring, left semicircle ring, round pin axle, fastening bolt and fastening nut, right semicircle ring and left semicircle ring splice annular snap ring, and the head end of right semicircle ring and left semicircle ring is articulated through the round pin axle, and the tail end is equipped with rectangular cross section's right connecting block and left connecting block respectively, screw in fastening nut behind the bolt hole on left connecting block and the right connecting block is passed in proper order to fastening bolt's afterbody, all is equipped with built-in screw hole and the connecting bolt that matches with built-in screw hole at the middle part of right semicircle ring and left semicircle ring, connecting bolt's afterbody passes in the screw hole on screw in bearing box terminal surface behind the built-in screw hole.

The finish rolling support roller capable of preventing axial movement is characterized in that a key groove is formed in the inner side of the right semicircular ring or the inner side of the left semicircular ring.

According to the finish rolling support roll capable of preventing axial movement, two-way thrust bearing boxes are additionally arranged on two sides of the support roll respectively, and four rows of thrust bearings are arranged in each two-way thrust bearing box.

The finish rolling support roller capable of preventing axial movement is additionally provided with the thrust rings between the left bearing box and the left snap ring and between the right bearing box and the right snap ring.

Above-mentioned can prevent finish rolling backing roll of axial float, the width of right side connecting block is greater than the width of left connecting block.

The width of the left connecting block is 20-25mm, and the width of the right connecting block is 25-30mm.

Advantageous effects

The utility model discloses fix the backing roll on the main shaft, the both sides of backing roll are fixed with left bearing box and right bearing box respectively, and the reuse snap ring is fixed, and such structure is stable, firm with fixed mode. The fastening bolt and the fastening nut which can be replaced at any time are utilized to connect the tail ends of the two semicircular rings together, so that the phenomenon that the traditional snap ring is provided with a threaded hole to cause breakage and the snap ring is separated and falls off and the phenomenon that a bearing box is loosened can be avoided, and the steel scrap accident caused by box burning is reduced, thereby reducing the maintenance cost of equipment and ensuring the stable operation of production.

Drawings

The present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a schematic view of the present invention;

FIG. 2 is a schematic view of a snap ring structure;

FIG. 3 is a side view of FIG. 2;

FIG. 4 is a schematic structural diagram of a finish rolling support roller with an additional bidirectional thrust bearing box.

In the drawings, the reference numerals are respectively given as: 1. the device comprises a built-in screw hole, 2, a fastening bolt, 3, a fastening nut, 4, a right semicircular ring, 5, a left semicircular ring, 6, a pin shaft, 7, a left connecting block, 8 and a right connecting block; 9. the bearing comprises a left bearing box, 10 a right bearing box, 11 a supporting roller, 12 a left clamping ring, 13 a right clamping ring, 14 a main shaft, 15 a bidirectional thrust bearing box, 16 and a thrust ring.

Detailed Description

The utility model discloses to prior art's drawback, provide a can prevent finish rolling backing roll of axial float, the structure of this backing roll and the design of snap ring can avoid the backing roll to operate the in-process snap ring connection failure on computer, produce the separation, drop, prevent that the bearing box is not hard up, burn the case and the scrap steel accident that causes, guarantee that production is stable in the same direction as going.

Referring to fig. 1, the utility model discloses a main shaft 14, backing roll 11, left bearing box 9, right bearing box 10, left snap ring 12 and right snap ring 13, the backing roll is fixed on the main shaft, and the both sides of backing roll are fixed with left bearing box and right bearing box respectively, and left snap ring is fixed with left bearing box, and right snap ring is fixed with right bearing box. The structure of left side snap ring and right snap ring is the same, and every snap ring includes right semicircle ring 4, left semicircle ring 5, round pin axle 6, fastening bolt 2 and fastening nut 3, and the head end of right semicircle ring 4 and left semicircle ring 5 is articulated together through round pin axle 6, and the tail end passes through fastening bolt 2 to be connected, constitutes a complete snap ring, and the inboard of snap ring is equipped with the keyway. For preventing the snap ring separation, cause to connect inefficacy and drop, and then lead to the bearing box not hard up and bearing scaling loss scheduling problem, the utility model discloses structure, bearing box and the snap ring with current backing roll have improved. Right semicircle ring 4 after the improvement and 5 tail ends of left semicircle ring are equipped with the right angle recess that can expose fastening bolt head and afterbody, be about to the partial metal excision in two semicircle ring tail end outsides, make the tail end of the two form rectangular cross section's right connecting block 8 and left connecting block 7, expose fastening bolt 2's head and afterbody, fasten with fastening bolt 2 through fastening nut 3 between right connecting block 8 and the left connecting block 7, avoid damaging and making two semicircle ring joint failures because of the screw thread in the screw hole of the 4 tip of right semicircle ring that frequent dismouting fastening bolt 2 leads to, eliminate the hidden danger that the snap ring separation dropped.

The bearing in the bearing box adopts a thrust bearing, such as a one-way thrust bearing or a two-way thrust bearing.

The utility model is characterized in that two sides of the supporting roll 11 are respectively provided with and fixed with two-way thrust bearing boxes 15, and four rows of thrust bearings are arranged in the two-way thrust bearing boxes to further improve the axial and radial bearing capacity of the supporting roll; thrust rings 16 are additionally arranged between the left bearing box 9 and the left snap ring 12 and between the right bearing box 10 and the right snap ring 13, and the thrust rings 16 are sleeved on the main shaft.

Still referring to fig. 1, in order to ensure effective stress of the right connecting block 8 at the tail end of the right semicircular ring 4 and the left connecting block 7 at the tail end of the left semicircular ring 5, the size of the right connecting block 8 at the fastening end is larger than that of the left connecting block 7 at the head of the fastening bolt 2, the width of the left connecting block 7 at the tail end of the left semicircular ring 5 is 20-25mm, and the width of the right connecting block 8 at the tail end of the right semicircular ring 4 is 25-30mm, so that the two connecting blocks are prevented from being broken due to too thin thickness.

The utility model discloses a be used for connecting the aperture of the built-in silk hole 1 of bearing box on right semicircle ring 4 and the left semicircle ring 5 is 16mm-26mm, and the diameter that is used for holding the recess of connecting bolt head of the 1 tip in built-in silk hole is 20mm-30mm, and connecting bolt passes behind the built-in silk hole 1 and fastens with the bearing box. Therefore, the fracture of the connecting bolt caused by overlarge shearing force can be avoided, and the normal service cycle of the support roller bearing box clamping ring is ensured.

The utility model discloses when the equipment, at first fix the backing roll on the main shaft, the both sides of backing roll are fixed with left bearing box and right bearing box respectively, install the snap ring again. The right semicircular ring 4 and the left semicircular ring 5 are installed in a locking groove of a roller shaft position, a key groove in the inner side of a clamping ring is matched with a key on a bearing inner sleeve by rotating the clamping ring, the clamping ring and a bearing inner ring rotate in the same direction, a right connecting block 8 and a left connecting block 7 are connected together through a fastening bolt 2 and a fastening nut 3, and the connecting bolt penetrates through a built-in screw hole 1 and then is fastened with a bearing box.

Adopt the utility model discloses a design, roll bearing box and snap ring can reliably be locked to can prevent effectively that the snap ring from droing at rolling in-process, avoid the not hard up bearing scaling who causes of bearing box to lose, reduced production and time the improper replacement of part mistimed, guarantee the stable direct motion of production, further reduced human cost and maintenance worker's intensity of labour simultaneously, the reduction of snap ring loss volume makes the roll cost obtain effective control.

Claims (7)

1. The utility model provides a can prevent finish rolling backing roll of axial float, characterized by, finish rolling backing roll includes main shaft (14), backing roll (11), left bearing box (9), right bearing box (10), left snap ring (12) and right snap ring (13), backing roll (11) are fixed on main shaft (14), and the both sides of backing roll (11) are fixed with left bearing box (9) and right bearing box (10) respectively, and left snap ring (12) are fixed with left bearing box (9), and right snap ring (13) are fixed with right bearing box (10).

2. The finish rolling support roll capable of preventing axial movement according to claim 1, characterized in that the left snap ring (12) and the right snap ring (13) are identical in structure, each snap ring comprises a right semicircular ring (4), a left semicircular ring (5), a pin shaft (6), a fastening bolt (2) and a fastening nut (3), the right semicircular ring (4) and the left semicircular ring (5) are spliced into an annular snap ring, the head ends of the right semicircular ring (4) and the left semicircular ring (5) are hinged through the pin shaft (6), the tail ends of the right semicircular ring (4) and the left semicircular ring (5) are respectively provided with a right connecting block (8) and a left connecting block (7) with rectangular cross sections, the tail portion of the fastening bolt (2) sequentially penetrates through the bolt holes in the left connecting block (7) and the right connecting block (8) and then is screwed into the fastening nut (3), the middle portions of the right semicircular ring (4) and the left semicircular ring (5) are respectively provided with a built-in screw hole (1) and a connecting bolt matched with the built-in screw hole (1), and the tail portion of the connecting bolt penetrates through the bolt hole (1) and then is screwed into the screw hole in the bearing box end face.

3. A back-up roll for finish rolling capable of preventing axial play according to claim 2, wherein the right half-ring (4) or the left half-ring (5) is provided with a key groove on the inner side.

4. A back-up roll for finish rolling capable of preventing axial runout as claimed in claim 2, wherein two thrust bearing housings (15) are respectively added to both sides of the back-up roll (11), and four rows of thrust bearings are provided in the thrust bearing housings (15).

5. A back-up roll for finish rolling capable of preventing axial play according to claim 2, wherein thrust rings (16) are additionally provided between the left bearing housing (9) and the left snap ring (12) and between the right bearing housing (10) and the right snap ring (13).

6. A support roll for finish rolling capable of preventing axial play as claimed in claim 2, wherein the width of the right connecting block (8) is larger than that of the left connecting block (7).

7. Finishing back-up roll capable of preventing axial play as claimed in claim 6, characterized in that the width of the left connecting piece (7) is 20-25mm and the width of the right connecting piece (8) is 25-30mm.

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