Tool for disassembling, assembling and carrying rolling mill bearing

Abstract

The tool comprises a center frame, a sliding block and three clamping jaws, the center frame comprises a vertical pull rod, a hanging ring is arranged at the upper end of the vertical pull rod, three radial supporting arms evenly distributed around the axis of the vertical pull rod are fixed to the lower end of the vertical pull rod, a sliding groove is formed in the end, away from the vertical pull rod, of each supporting arm, and the sliding block is arranged in the sliding groove. The sliding block comprises a sleeve, the sleeve is arranged on the vertical pull rod in a sliding and sleeving mode, the three clamping jaws are evenly distributed around the vertical pull rod, each clamping jaw comprises a straight handle, the middle of each straight handle is installed in a sliding groove in a sliding mode, a jaw head is arranged on the side, away from the axis of the vertical pull rod, of the lower end of each straight handle, and the upper end of each straight handle inclines towards the vertical pull rod and is rotationally connected with the sleeve. Linear motion of the sliding block relative to the center frame is converted into closing and expanding motion of the three clamping jaws, the clamping jaws are kept in the expanding state through friction force, operation is convenient and fast, and compared with a traditional rolling mill bearing disassembling and assembling tool, maintenance efficiency of a rolling mill bearing is greatly improved.

Description

Technical Field

[0001] The utility model relates to a tool capable of quickly disassembling, assembling and transporting a rolling mill bearing, belonging to the technical field of workshop tools. Background Art

[0002] The rolling mill bearings of cold rolling mills in metallurgical enterprises need to be regularly cleaned and maintained. Due to the large number of rolling mill bearings online and the short maintenance cycle, the daily maintenance workload is relatively large. When cleaning and maintaining the rolling mill bearings, it is necessary to take out the rolling mill bearings from the bearing inner cavity and transport them to the cleaning station, and then put them back into the bearing inner cavity after cleaning. Since some rolling mill bearings are heavy and cannot be carried by manpower, and the currently used rolling mill bearing disassembly and assembly tools are very cumbersome to operate and time-consuming, resulting in low maintenance work efficiency. Therefore, it is very necessary to design a tool capable of quickly disassembling, assembling and transporting rolling mill bearings. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a disassembly, assembly and transportation tool for rolling mill bearings to improve the maintenance efficiency of rolling mill bearings in view of the disadvantages of the prior art.

[0004] To achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A disassembly, assembly and transportation tool for rolling mill bearings includes a center frame, a sliding block and three claws. The center frame includes a vertical pull rod. A lifting ring is arranged at the upper end of the vertical pull rod, and three radially distributed support arms are fixed at the lower end of the vertical pull rod around its axis. A chute is arranged at one end of each support arm far away from the vertical pull rod. The sliding block includes a sleeve which is slidably sleeved on the vertical pull rod. The three claws are evenly distributed around the axis of the vertical pull rod. Each claw includes a straight handle. The middle part of the straight handle is slidably installed in the chute on one support arm. A claw head is arranged on one side of the lower end of the straight handle far away from the axis of the vertical pull rod, and the upper end inclines towards the vertical pull rod and is rotatably connected with the sleeve.

[0006] For the above disassembly, assembly and transportation tool for rolling mill bearings, the sliding block further includes three pairs of ear plates, and corresponding bolts and nuts for each pair of ear plates. Each pair of ear plates corresponds to a straight handle. The three pairs of ear plates are fixed on the outer wall of the sleeve and evenly distributed around the sleeve. A bolt hole matching the bolt is arranged on each ear plate. A bolt through hole matching the bolt is arranged at the upper end of the straight handle located between the corresponding pair of ear plates. The bolt passes through the bolt hole on the ear plate and the bolt through hole at the upper end of the straight handle and then is screwed into the nut.

[0007] For the above disassembly, assembly and transportation tool for rolling mill bearings, a circular boss is arranged in the middle and upper part of the vertical pull rod, and the sleeve is located between the circular boss and the support arm.

[0008] For the above disassembly, assembly and transportation tool for rolling mill bearings, the cross section of the straight handle is rectangular.

[0009] The utility model converts the linear motion of the sliding block relative to the center frame into the closing and expanding motion of three jaws, and uses friction force to maintain the expanded state of the jaws. The structure design is ingenious, and the operation is very convenient and fast. Compared with the traditional disassembly and assembly tool for rolling mill bearings, the maintenance efficiency of rolling mill bearings is greatly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The present utility model will be further described in detail below in conjunction with the drawings and specific embodiments.

[0011] Figure 1 is a schematic structural view of the present utility model;

[0012] Figure 2 is a schematic structural view of the center frame;

[0013] Figure 3 is a schematic structural view of the sliding block;

[0014] Figure 4 is a schematic structural view of the jaw;

[0015] Figure 5 is a schematic working view of the present utility model.

[0016] The reference numerals in the drawings are as follows: 1, center frame; 2, sliding block; 3, jaw; 4, bolt; 5, nut; 6, rolling mill bearing.

[0017] 1-1, vertical pull rod; 1-2, annular boss; 1-3, lifting ring; 1-4, support arm; 1-5, chute.

[0018] 2-1, sleeve; 2-2, ear plate; 2-3, bolt hole.

[0019] 3-1, straight handle; 3-2, bolt through hole; 3-3, claw head. SPECIFIC EMBODIMENTS

[0020] The present utility model provides a disassembly, assembly and handling tool for rolling mill bearings aiming at the problems existing in the prior art. By using this tool, the rolling mill bearings can be disassembled, assembled and handled quickly, and the working efficiency is improved.

[0021] Refer to Figure 1 The present utility model includes a center frame 1, a sliding block 2 and three jaws 3.

[0022] Refer to Figure 2, the steady rest 1 includes a vertical pull rod 1-1. A lifting ring 1-3 is provided at the upper end of the vertical pull rod 1-1, and an annular boss 1-2 is provided in the upper middle part. Three radially distributed support arms 1-4 evenly distributed around its axis are fixed at the lower end of the vertical pull rod 1-1. The included angle between any two support arms 1-4 is 120 degrees. A chute 1-5 is formed at one end of each support arm 1-4 away from the vertical pull rod 1-1.

[0023] See Figure 1 and Figure 3 , the sliding block 2 includes a sleeve 2-1, three pairs of ear plates 2-2, and bolts 4 and nuts 5 corresponding to each pair of ear plates 2-2. The sleeve 2-1 is slidably sleeved on the vertical pull rod 1-1 and is located between the annular boss 1-2 and the support arms 1-4. The three pairs of ear plates 2-2 are fixed on the outer wall of the sleeve 2-1 and are evenly distributed around the sleeve 2-1. A clamping jaw 3 is installed between each pair of ear plates 2-2. A bolt hole 2-3 matching the bolt 4 is provided on each ear plate 2-2.

[0024] See Figure 1 and Figure 4 , the three clamping jaws 3 are evenly distributed around the axis of the vertical pull rod 1-1. The clamping jaw 3 includes a straight handle 3-1. The cross-section of the straight handle 3-1 is rectangular. The middle part of the straight handle 3-1 is located in the chute 1-5 on a support arm 1-4 and is in sliding contact with the inner wall of the chute 1-5. The upper end of the straight handle 3-1 is located between a pair of ear plates 2-2 and is provided with a bolt through hole 3-2 matching the bolt 4. After the bolt 4 passes through the bolt hole 2-3 on the ear plate 2-2 and the bolt through hole 3-2 at the upper end of the straight handle 3-1, it is screwed into the nut 5 to realize the rotational connection between the clamping jaw 3 and the sliding block 2. A claw head 3-3 is provided on one side of the lower end of the straight handle 3-1 away from the axis of the vertical pull rod 1-1.

[0025] After the utility model is assembled, the distance between the bolt 4 and the axis of the vertical pull rod 1-1 is less than the distance between the chute 1-5 and the axis of the vertical pull rod 1-1, so that the upper end of the straight handle 3-1 inclines towards the vertical pull rod 1-1, and the lower end inclines towards the direction away from the axis of the vertical pull rod 1-1.

[0026] See Figure 5, when maintaining the rolling mill bearing, first lift the sliding block 2 by hand to make the lower ends of the three claws 3 converge. Place the present utility model inside the inner ring of the rolling mill bearing 6. Drive the lifting ring 1-3 upward with the crane hook. The lifting ring 1-3 drives the three support arms 1-4 upward through the vertical pull rod 1-1. The sliding block 2 moves downward relative to the center frame 1, and the lower ends of the three claws 3 expand outward until the claw heads 3-3 at the lower ends of the claws 3 catch the bottom of the inner ring of the rolling mill bearing 6. The whole of the present utility model moves upward and drives the upward movement of the rolling mill bearing 6 to remove the rolling mill bearing 6 from the bearing inner cavity. During the movement of the rolling mill bearing 6, the friction force between the straight handles 3-1 of the three claws 3 and the support arms 1-4 keeps the three claws 3 in an expanded state. When the rolling mill bearing 6 is placed at the cleaning station, the center frame 1 continues to move downward, while the claws 3 and the sliding block 2 stop moving downward. A gap is generated between the straight handles 3-1 of the three claws 3 and the bottom of the sliding grooves 1-5 on the support arms 1-4, losing the friction force. At this time, lift the sliding block 2 upward by hand, and the lower ends of the three claws 3 converge and disengage from the bottom end of the rolling mill bearing 6. When the sliding block 2 moves to the position of the annular boss 1-2, continue to lift the sliding block 2 upward to take out the present utility model from the rolling mill bearing 6, completing the removal and handling of the rolling mill bearing 6. After the rolling mill bearing 6 is cleaned and maintained, use the same method to move the rolling mill bearing 6 into the bearing inner cavity to complete the handling and installation of the rolling mill bearing 6.

[0027] The structure of the present utility model is simple and the operation is convenient. It can realize the rapid disassembly, assembly and handling of the rolling mill bearing, improving the maintenance efficiency of the rolling mill bearing.

Claims

1. A tool for disassembling, assembling and transporting rolling mill bearings, characterized in that: The invention comprises a central frame (1), a sliding block (2) and three claws (3), wherein the central frame (1) comprises a vertical pull rod (1-1), the upper end of the vertical pull rod (1-1) is provided with a lifting ring (1-3), the lower end is fixed with three radial support arms (1-4) evenly distributed around its axis, and each support arm (1-4) is provided with a sliding groove (1-5) at one end away from the vertical pull rod (1-1), and the sliding block (2) comprises a sleeve (2-1), the sleeve (2-1) slides The movable sleeve is mounted on the vertical pull rod (1-1), and three claws (3) are evenly distributed around the axis of the vertical pull rod (1-1). Each claw (3) includes a straight handle (3-1), and the middle part of the straight handle (3-1) is slidably mounted in a slide groove (1-5) on a support arm (1-4). A claw head (3-3) is provided at the lower end of the straight handle (3-1) away from the axis of the vertical pull rod (1-1), and the upper end is inclined toward the vertical pull rod (1-1) and is rotationally connected to the sleeve (2-1).

2. A rolling mill bearing disassembly and handling tool according to claim 1, characterized in that: The sliding block (2) further comprises three pairs of ear plates (2-2) and bolts (4) and nuts (5) corresponding to each pair of ear plates (2-2), each pair of ear plates (2-2) corresponding to a straight handle (3-1), the three pairs of ear plates (2-2) being fixed on the outer wall of the sleeve (2-1) and being evenly distributed around the sleeve (2-1), each ear plate (2-2) being provided with a bolt hole (2-3) matching the bolt (4), the upper end of the straight handle (3-1) being located between the corresponding pair of ear plates (2-2) and being provided with a bolt through hole (3-2) matching the bolt (4), the bolt (4) passing through the bolt hole (2-3) on the ear plate (2-2) and the bolt through hole (3-2) at the upper end of the straight handle (3-1) and then being screwed into the nut (5).

3. A rolling mill bearing disassembly and handling tool according to claim 1 or 2, characterized in that: An annular boss (1-2) is provided at the middle and upper part of the vertical pull rod (1-1), and the sleeve (2-1) is located between the annular boss (1-2) and the support arm (1-4).

4. A rolling mill bearing disassembly and handling tool according to claim 3, characterized in that: The cross section of the straight handle (3-1) is rectangular.

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