Dismounting device for vertical roll bearing of universal rolling mill

Abstract

The utility model relates to a universal rolling mill vertical roll bearing dismounting device which comprises a fixed seat, a clamping mechanism, a jack, a push plate and two chucks, and the clamping mechanism is installed on the fixed seat; the jack is arranged between the clamping mechanisms; the push plate is arranged at one end of a piston rod of the jack and is circular, and the diameter of the push plate is smaller than or equal to that of a bearing outer ring. The two chucks are semicircular and are matched with the push plate; extension parts are arranged on the outer sides of the two chucks; the thickness of the extension part is smaller than or equal to the distance between the two bearing outer rings; and the extension part is elliptical. According to the bearing outer ring dismounting device, the two chucks can be manually placed into bearing outer rings through the oval extending parts, meanwhile, the extending parts of the two chucks can be inserted into a gap between the two bearing outer rings, the bearing outer rings are ejected out through the jack and the push plate, the bearing dismounting efficiency is improved, the labor intensity of workers is relieved, and the bearing dismounting efficiency is improved. And the safety risk during operation is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of vertical roll bearings, and particularly relates to a dismounting device for vertical roll bearings of a universal rolling mill. Background Art

[0002] In the section steel production line, the vertical roll bearings of the universal rolling mill are double-row tapered roller bearings with a double outer ring structure. As shown in Figure 1 , the outer rings of two bearings in the same row are installed at intervals in the vertical roll. The vertical roll and the outer ring of the bearing are in interference fit. During assembly, the outer ring of the bearing needs to be placed in liquid nitrogen for cooling for 3 to 5 minutes and then put into the vertical roll. After returning to normal temperature, the outer ring of the rolling mill bearing is tightly assembled to the vertical roll.

[0003] Generally, when maintaining and disassembling the vertical roll bearings, after the inner ring is disassembled, the staff manually knock the outer ring of the bearing. Since the interference amount between the outer ring of the bearing and the vertical roll is large, and there is a protrusion on the vertical roll between the two outer rings of the bearing, the two outer rings of the bearing cannot be pushed out simultaneously, and the disassembly is very difficult, which is extremely easy to cause damage to the bearing. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a dismounting device for vertical roll bearings of a universal rolling mill, which can conveniently disassemble the outer ring of the bearing and avoid damage to the bearing caused by manual knocking disassembly.

[0005] To achieve the above purpose, the technical solution adopted by the utility model is a dismounting device for vertical roll bearings of a universal rolling mill, including a fixed seat, a clamping mechanism, a jack, a push plate and two chucks.

[0006] The clamping mechanism is installed on the fixed seat; the jack is arranged between the clamping mechanisms; the push plate is arranged at one end of the piston rod of the jack, and the push plate is circular with a diameter less than or equal to the diameter of the outer ring of the bearing.

[0007] The two chucks are semi-circular and cooperate with the push plate; extension parts are arranged on the outer sides of the two chucks; the thickness of the extension part is less than or equal to the distance between the two outer rings of the bearing; the extension part is elliptical.

[0008] Preferably, the clamping mechanism includes two symmetrical pulling arms, the two pulling arms are hinged to the fixed seat, and clamping jaws are arranged at the ends of the two pulling arms far away from the fixed seat; the jack is fixed between the two pulling arms.

[0009] Preferably, a top block cooperating with the two chucks is fixed on the side of the push plate away from the jack.

[0010] Preferably, it further includes a mobile trolley, and the fixed seat and the jack are fixed on the mobile trolley.

[0011] Preferably, a lengthening sleeve is fixed between the piston rod of the jack and the push plate.

[0012] The utility model relates to a dismounting device for a vertical roll bearing of a universal rolling mill, which has the following advantages compared with the prior art:

[0013] (1) Through the oval extension part, two chucks can be manually placed into the outer ring of the bearing while the extension parts of the two chucks are inserted into the gap between the two outer rings of the bearing, and the outer ring of the bearing is pushed out by the jack and the push plate;

[0014] (2) Through the structure of the combined chuck and the top block, the chuck is prevented from withdrawing when moving, so that the bearing dismounting process is safe and stable, ensuring that the bearing is smoothly extruded.

[0015] (3) The design is simple and easy to use. Description of the Drawings

[0016] Figure 1 It is a schematic structural diagram of a double-row tapered roller bearing;

[0017] Figure 2 It is a schematic structural diagram when the utility model is disassembled;

[0018] Figure 3 It is a side view when the utility model is disassembled;

[0019] Figure 4 It is a schematic structural diagram of the utility model after removing the chuck;

[0020] Figure 5 It is a schematic structural diagram of the chuck in the bearing. Detailed Embodiments

[0021] The following further describes the utility model in conjunction with the drawings and specific embodiments.

[0022] As Figures 1-5 shown, a dismounting device for a vertical roll bearing of a universal rolling mill includes a fixed seat 2, a clamping mechanism, a jack 3, a push plate 31 and two chucks 4,

[0023] The clamping mechanism is installed on the fixed seat 2 and is used for clamping the vertical roll 11 of the bearing; the jack 3 is arranged between the clamping mechanisms; the push plate 31 is arranged at one end of the piston rod of the jack 3, and the push plate 31 is circular with a diameter less than or equal to the diameter of the outer ring 12 of the bearing;

[0024] The two chucks 4 are designed in a split type. The two chucks 4 are semi-circular and cooperate with the push plate 31. Extension parts 41 are provided on the outer sides of the two chucks 4. The thickness of the extension part 41 is less than or equal to the distance between the outer rings 12 of the two bearings. The extension part 41 is oval. After the inner ring of the bearing is removed, since the extension part 41 is oval, the two chucks 4 can be manually placed into the outer rings 12 of the bearings. At the same time, the extension parts 41 of the two chucks 4 are inserted into the gap between the outer rings 12 of the two bearings. After the vertical rollers 11 of the bearing are clamped by the clamping mechanism, the push plate 31 abuts against the two chucks 4. The jack 3 is started, and the piston rod of the jack 3 extends. The push plate 31 pushes the two chucks 4, and the extension parts 41 of the two chucks 4 push the outer ring 12 of the bearing away from the jack 3 until the outer ring 12 of the bearing is pushed out of the vertical roller 11. Then the bearing is flipped, and the push plate 31 pushes out the other outer ring 12 of the bearing.

[0025] The clamping mechanism includes two symmetric pull arms 51. The two pull arms 51 are hinged to the fixed seat 2, and clamping jaws 52 are provided at the ends of the two pull arms 51 away from the fixed seat 2. The vertical rollers 11 of the bearing are clamped by the clamping jaws 52. The jack 3 is fixed between the two pull arms 51.

[0026] In this embodiment, a top block 311 that cooperates with the two chucks 4 is fixed on the side of the push plate 31 away from the jack 3. After the two chucks 4 are placed into the outer ring 12 of the bearing, the push plate 31 abuts against the two chucks 4, and the top block 311 is inserted between the two chucks 4 to tighten the two chucks 4 and prevent the chucks 4 from withdrawing.

[0027] In this embodiment, a mobile trolley 6 is further included. The fixed seat 2 and the jack 3 are fixed on the mobile trolley 6. Since the bearing is heavy, the mobile trolley 6 facilitates the staff to move the vertical roller 11 bearing disassembly device to a suitable position to disassemble the bearing.

[0028] In order to be able to disassemble different types of bearings within the stroke of the jack 3, in this embodiment, an extension sleeve 32 is fixed between the piston rod of the jack 3 and the push plate 31. By selecting extension sleeves 32 of different lengths, the distance between the push plate 31 and the jack 3 can be lengthened to increase the extrusion operation range and adapt to bearings of different thicknesses.

[0029] Usage method of the utility model: After removing the inner ring of the bearing, make the bearing vertical, rotate the two pulling arms 51, and the two clamping jaws 52 clamp the vertical rollers 11 of the bearing. Manually tilt the chuck 4, place the two chucks 4 into the outer ring 12 of the bearing, and at the same time insert the extension parts 41 of the two chucks 4 into the gap between the two outer rings 12 of the bearing. The push plate 31 is in contact with the two chucks 4, and the top block 311 is inserted between the two chucks 4 to tighten the two chucks 4. Start the jack 3, the piston rod of the jack 3 extends, the push plate 31 pushes the two chucks 4, and the extension parts 41 of the two chucks 4 push the outer ring 12 of the bearing away from the jack 3 until the outer ring 12 of the bearing is pushed out of the vertical roller 11. Then, turn the bearing over, and the push plate 31 pushes out the other outer ring 12 of the bearing.

Claims

1. A vertical roll bearing disassembly device for a universal rolling mill, characterized in that It includes a fixed seat (1), a clamping mechanism, a jack (3), a push plate (31) and two chucks (4). The clamping mechanism is installed on the fixed seat (1); the jack (3) is arranged between the clamping mechanisms; the push plate (31) is arranged at one end of the piston rod of the jack (3), and the push plate (31) is circular with a diameter less than or equal to the diameter of the outer ring of the bearing. The two chucks (4) are semi-circular and cooperate with the push plate (31); extension parts (41) are arranged on the outer sides of the two chucks (4); the thickness of the extension parts (41) is less than or equal to the distance between the two outer rings of the bearings; the extension parts (41) are oval.

2. The vertical roll bearing disassembly device for a universal rolling mill according to claim 1, characterized in that, The clamping mechanism includes two symmetrical pulling arms (21), the two pulling arms (21) are hinged to the fixed seat (1), and clamping jaws (22) are arranged at the ends of the two pulling arms (21) far away from the fixed seat (1); the jack (3) is fixed between the two pulling arms (21).

3. The vertical roll bearing disassembly device for a universal rolling mill according to claim 1, characterized in that, A top block (311) that cooperates with the two chucks (4) is fixed on the side of the push plate (31) away from the jack (3).

4. The vertical roll bearing disassembly device for a universal rolling mill according to claim 1, characterized in that, It further includes a mobile trolley (5), and the fixed seat (1) and the jack (3) are fixed on the mobile trolley (5).

5. The vertical roll bearing disassembly device for the universal rolling mill according to claim 1, characterized in that, An extension sleeve (32) is fixed between the piston rod of the jack (3) and the push plate (31).

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