A short stress rolling mill bearing dismounting device

Abstract

The utility model provides a short stress rolling mill bearing dismounting device relates to rolling mill bearing dismounting technical field, including outer support, outer pull plate, inner pull plate, pull claw, protractor, drawing screw, outer hexagonal nut, guide rod, outer support is fixed on the bearing seat, outer pull plate is fixed in the outer support top, drawing screw is connected in the outer pull plate center through -hole, top and outer hexagonal nut are connected, bottom end is connected with inner pull plate, inner pull plate circumferential joint multiple pull claw, pull claw lower extreme is equipped with bearing adaptation clamping part, protractor is connected with pull claw sliding, guide rod is connected with inner pull plate, protractor is connected with guide rod sliding, protractor and inner pull plate on sliding connection's cylinder head inner hexagonal screw II are fixed, the protractor is connected with the slide bar of passing through inner pull plate and outer pull plate. The utility model discloses through the interaction between pull claw and drawing screw, makes the bearing from the bearing seat fast take out, avoided the trouble of manual cutting, improved the maintenance efficiency, made the bearing seat avoid the damage problem brought by cutting.

Description

Technical Field

[0001] This utility model relates to the field of rolling mill bearing disassembly technology, and in particular to a short-stress rolling mill bearing disassembly device. Background Technology

[0002] Short-stress rolling mills, as the most widely used small rolling mills in modern metallurgical steel rolling systems, have advantages such as short stress lines and high rigidity. Short-stress rolling mills typically use four-row cylindrical roller bearings as the main load-bearing bearings, and thrust tapered roller bearings as thrust bearings in the axial direction (e.g.,...). Figure 1 (As shown). During production, disassembly and replacement are performed. The bearing housing's inner bore and the bearing have an interference fit. The interference fit creates resistance during disassembly, making bearing removal difficult. Traditional disassembly methods typically involve cutting the bearing's inner ring, damaging it, and then hammering it out. This method is inefficient, easily damages the inner surface of the bearing housing, and affects the bearing's lifespan. Furthermore, the high-temperature molten metal splashing during manual cutting poses a safety hazard to workers, easily causing burns. Utility Model Content

[0003] To address the aforementioned technical problems, a bearing removal device for short-stress rolling mills is provided. This invention primarily utilizes the interaction between the pull claw and the pulling screw to quickly remove the bearing from its housing, avoiding the inconvenience of manual cutting and improving maintenance efficiency. This design prevents damage to the bearing housing caused by cutting, thus solving the problems of low bearing removal efficiency in short-stress rolling mills, reduced bearing life due to bearing housing damage, and safety hazards during cutting. The technical means employed in this invention are as follows: A short-stress rolling mill bearing disassembly device includes: a support positioning module, a pull-out transmission module, a force-bearing execution module, and an alignment guide module. The support positioning module includes an outer support and an outer pull plate. The pull-out transmission module includes a pull-out screw and an outer hexagonal nut. The force-bearing execution module includes an inner pull plate and a pull claw. The alignment guide module includes an indexer and a guide rod. The outer support is fixed to both sides of the bearing housing. The outer pull plate is detachably fixed to the top of the outer support. A through hole is opened in the center of the outer pull plate. The pull screw is vertically connected through the through hole. The upper part of the pull screw protruding from the through hole is threadedly connected to an external hexagonal nut. The bottom end of the pull screw protruding from the through hole is fixedly connected to the inner pull plate. The inner pull plate has multiple pull claws circumferentially hinged. The lower end of the pull claws is provided with a bearing adapter retaining part. The retaining part matches the structure of the outer ring of the bearing. The indexing device is located in the inner pull plate. Below the plate, the outer side of the indexer is slidably connected to the pull claw. The upper end of the guide rod is fixedly connected to the bottom end of the inner pull plate and passes through the indexer. The indexer is slidably connected to the guide rod and slides along the guide rod. A through hole is opened on the inner pull plate, and a cylindrical head hexagonal screw II is inserted into the through hole. The indexer is fixedly connected to the bottom end of the cylindrical head hexagonal screw II. The cylindrical head hexagonal screw II slides along the through hole. A sliding rod is connected to the indexer, and the sliding rod passes through the inner pull plate and the outer pull plate.

[0004] Furthermore, both ends of the outer pull plate are fixedly connected to the outer supports on both sides by cylindrical head hexagon socket screws I.

[0005] Furthermore, the inner pull plate and the pull claw are hinged together by a fixed pin.

[0006] Furthermore, the bottom end of the pull screw is fixedly connected to the inner pull plate by bolts.

[0007] Furthermore, it also includes a limiting constraint module, which includes multiple fixing pins. A pin hole is provided on the side of the hinge between the inner pull plate and each pull claw. The fixing pin is embedded in the pin hole to limit the swing angle of the pull claw relative to the vertical plane.

[0008] Furthermore, the swing angle of the pull claw is ≤15°.

[0009] Furthermore, the pull claws are provided in 2 to 4 portions, which are evenly distributed in a circle along the central axis of the pull screw.

[0010] Furthermore, the retaining part is hook-shaped or slot-shaped.

[0011] Furthermore, the bottom of the indexer is fixedly connected to multiple protrusions, and each of the pull claws has an elongated groove. The protrusions are inserted into the corresponding elongated grooves and slide along the elongated grooves.

[0012] Compared with the prior art, the present invention has the following advantages: 1. The short-stress rolling mill bearing disassembly device provided by this utility model enables the bearing to be quickly removed from the bearing housing through the interaction between the pull claw and the pull screw, avoiding the trouble of manual cutting and improving maintenance efficiency. This design avoids the damage caused by cutting the bearing housing.

[0013] 2. The short-stress rolling mill bearing disassembly device provided by this utility model drives the indexing device to move up and down by pulling the screw, which can realize the retraction or expansion of multiple pull claws, making it convenient to enter and exit the bearing inner hole, and can move to the bottom of the bearing and be stuck at the bottom of the bearing. When the pulling screw moves up, it drives the indexing device and pull claws to move up, and pushes the bearing up by the pull claws to realize the disassembly of the bearing.

[0014] Based on the above reasons, this utility model can be widely promoted in fields such as bearing disassembly. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of an existing short-stress rolling mill using four rows of cylindrical roller bearings.

[0017] Figure 2 This is a schematic diagram (sectional view) of the overall structure of a special disassembly device for short-stress rolling mill bearings according to this utility model.

[0018] Figure 3 This is a schematic diagram of the components in this utility model.

[0019] In the diagram: 1. Outer support; 2. Outer pull plate; 3. Inner pull plate; 4. Pull claw; 5. Indexer; 6. Pull screw; 7. External hexagonal nut; 8. Socket head screw I; 9. Fixing pin; 10. Socket head screw II; 11. Guide rod; 12. Fixing pin. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0021] This invention provides a short-stress rolling mill bearing disassembly device to solve the problems mentioned in the background art, such as low disassembly efficiency of short-stress rolling mill bearings, reduced bearing life due to bearing housing damage, and safety hazards during the cutting process.

[0022] Please see Figure 2 , Figure 3 This utility model discloses a special disassembly device for short-stress rolling mill bearings, comprising an outer support 1, an outer pull plate 2, an inner pull plate 3, a pull claw 4, an indexing device 5, a pull screw 6, an external hexagonal nut 7, a cylindrical head internal hexagonal screw I 8 (diameter M36), a fixing pin 9, a cylindrical head internal hexagonal screw II 10 (diameter M12), a guide rod 11, and a fixing pin 12.

[0023] 1. Support and positioning module (external support 1 + external pull plate 2) External support 1: It adopts a frame structure and is fixed on the bearing seat. The inner wall of external support 1 is precisely matched with the outer wall of the short stress rolling mill bearing seat, providing a stable support foundation for the device and ensuring the spatial positioning accuracy during the disassembly process.

[0024] Outer pull plate 2: It is horizontally and detachably fixed to the top of the outer support 1 by a cylindrical head hexagonal screw I8, forming the upper load-bearing structure of the device; the outer pull plate 2 has a through hole in the center for the pull screw 6 to pass through vertically.

[0025] 2. Pulling transmission module (pulling screw 6 + external hexagonal nut 7) Pulling screw 6: Vertically penetrates the center through hole of the outer pull plate 2, and the upper part of the through hole is screwed with an external hexagonal nut 7. The bottom end of the through hole is rigidly connected to the inner pull plate 3 (preferably bolted for easy maintenance). The pulling screw 6 is coaxial with the bearing during use.

[0026] External hexagonal nut 7: Through the tightening / loosening action, i.e., tightening / loosening the external hexagonal nut 7, axial tension is transmitted, thereby driving the pull screw 6 to move axially, converting torque into axial pull force, and transmitting it to the inner pull plate 3.

[0027] 3. Force-bearing actuation module (inner pull plate 3 + pull claw 4 + fixed pin 9) Inner pull plate 3: As a force distribution carrier, it is circumferentially hinged to 2 to 4 pull claws 4 through fixed pin 9 (multiple pull claws 4 are evenly distributed along the circumference to ensure symmetrical force distribution in the circumferential direction).

[0028] Pull claw 4: The lower end is equipped with a bearing adapter retaining part (such as hook type or slot type, matching the bearing outer ring structure). Through the hinge structure, "self-adaptive retaining" is achieved to ensure uniform force on the bearing—it automatically fits into the bearing slot during installation and applies force synchronously and evenly during disassembly. The retaining part is engaged with the bottom of the inner and outer rings of the bearing at the bottom of the lowest part of the bearing housing.

[0029] 4. Alignment and Guiding Module (Indexer 5 + Guide Rod 11) Indexing device 5: Its outer side is slidably connected to the pull claw 4, and it is connected to the lower part of the inner pull plate 3 via two cylindrical head hexagon socket screws II10. The inner pull plate 3 has two through holes, each into which a cylindrical head hexagon socket screw II10 is inserted. The indexing device 5 is fixedly connected to the bottom end of the cylindrical head hexagon socket screws II10, which slide along the through holes. A sliding rod (not shown in the figure) is also connected to the indexing device 5. The sliding rod passes through the inner pull plate 3 and the outer pull plate 2, with its upper end extending a distance above the outer pull plate 2. By pushing and pulling the sliding rod, the up-and-down movement of the indexing device 5 is adjusted, completing the opening and closing process of the pull claw 4. The sliding rod also guides the movement of the inner pull plate 3. The bottom of the indexer 5 is fixedly connected with a protrusion. Each claw 4 has a long slot. Each protrusion is inserted into the corresponding long slot and slides along its respective long slot. The cooperation between multiple protrusions and multiple long slots can help the multiple claws 4 to be evenly distributed and aligned in the circumference, thereby improving the installation accuracy (error ≤ ±2°).

[0030] Guide rod 11: Two rods are provided, perpendicular to the indexer 5. The bottom end of the inner pull plate 3 is fixedly connected to the upper end of the two guide rods 11. The guide rod 11 passes through the indexer 5, and the indexer 5 is slidably connected to the guide rod 11, sliding along the guide rod 11. The guide rod 11 can guide the indexer 5 to move axially in a straight direction, avoiding damage to bearings or rolling mill components due to uneven load during disassembly.

[0031] 5. Limit constraint module (fixed pin 12) Fixed pin 12: This pin is embedded in a pin hole next to the hinge joint between the inner pull plate 3 and the pull claw 4. The fixed pin 12 limits the swing angle of the pull claw 4 (swing range ≤ 15°, and the angle between the pull claw 4 and the vertical plane ≤ 15° during swing), preventing excessive deformation of the pull claw 4 and ensuring structural stability and effective force distribution. When the pull claw 4 swings to its maximum angle, the fixed pin 12 can prevent the pull claw 4 from swinging further upward.

[0032] The working principle of this utility model: In the initial state, the indexer 5 is pushed down by the slide bar, causing the pull claw 4 to rotate inward under the action of the indexer 5 and its own gravity. Multiple pull claws 4 are in a retracted state until the pull claw 4 rotates to the point where it can enter the bearing inner hole.

[0033] In use, the outer support 1 is fixed to the bearing housing. As needed, the pulling screw 6 can be moved downward by loosening the outer hexagonal nut 7 to adjust the depth of the device entering the bearing until the retracted multiple pull claws 4, along with the inner pull plate 3, indexing device 5, and other components, are moved together to the bottom of the bearing housing below the bearing. Then, the sliding rod is pulled upward to move the indexing device 5 upward, thereby spreading the multiple pull claws 4 outward so that they are all locked at the bottom of the outer ring of the bearing. After that, the outer hexagonal nut 7 is tightened to move the pulling screw 6 upward, which in turn moves the inner pull plate 3, indexing device 5, and pull claws 4 upward (the sliding rod can limit and guide the movement of the inner pull plate 3, preventing the inner pull plate 3 from rotating when the outer hexagonal nut 7 rotates the pulling screw 6; the sliding rod allows the inner pull plate 3 to move up and down in a straight line without rotating). At the same time, the pull claws 4 push the bearing upward, allowing the bearing to be quickly removed from the bearing housing, thus achieving bearing disassembly.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A short-stress rolling mill bearing disassembly device, characterized in that, include: The system includes a support positioning module, a pull-out transmission module, a force-bearing execution module, and an alignment guide module. The support positioning module includes an outer support (1) and an outer pull plate (2). The pull-out transmission module includes a pull-out screw (6) and an outer hexagonal nut (7). The force-bearing execution module includes an inner pull plate (3) and a pull claw (4). The alignment guide module includes an indexer (5) and a guide rod (11). The outer support (1) is fixed on both sides of the bearing seat. The outer pull plate (2) is detachably fixed to the top of the outer support (1). A through hole is opened in the center of the outer pull plate (2). The pull screw (6) is vertically connected through the through hole. The pull screw (6) is threaded through the top of the through hole and screwed into the hexagonal nut (7). The bottom end of the pull screw (6) is fixedly connected to the inner pull plate (3). The inner pull plate (3) has multiple pull claws (4) circumferentially hinged. The lower end of the pull claws (4) is provided with a bearing adapter retaining part. The retaining part matches the outer ring structure of the bearing. The indexer (5) is located below the inner pull plate (3). The outer side of the indexer (5) is slidably connected to the pull claw (4). The upper end of the guide rod (11) is fixedly connected to the inner pull plate (3) and passes through the indexer (5). The indexer (5) is slidably connected to the guide rod (11) and slides along the guide rod (11). A through hole is opened on the inner pull plate (3). A cylindrical head hexagonal screw II (10) is inserted into the through hole. The bottom end of the indexer (5) is fixedly connected to the cylindrical head hexagonal screw II (10). The cylindrical head hexagonal screw II (10) slides along the through hole. A sliding rod is connected to the indexer (5). The sliding rod passes through the inner pull plate (3) and the outer pull plate (2).

2. The short-stress rolling mill bearing disassembly device according to claim 1, characterized in that, Both ends of the outer pull plate (2) are fixedly connected to the outer supports (1) on both sides by cylindrical head hexagonal screws I (8).

3. The short-stress rolling mill bearing disassembly device according to claim 1, characterized in that, The inner pull plate (3) and the pull claw (4) are hinged together by a fixed pin (9).

4. The short-stress rolling mill bearing disassembly device according to claim 1, characterized in that, The bottom end of the pull screw (6) is fixedly connected to the inner pull plate (3) by bolts.

5. The short-stress rolling mill bearing disassembly device according to claim 1, characterized in that, It also includes a limiting constraint module, which includes multiple fixing pins (12). A pin hole is provided on the side of the hinge between the inner pull plate (3) and each pull claw (4). The fixing pin (12) is embedded in the pin hole to limit the swing angle of the pull claw (4) relative to the vertical plane.

6. The short-stress rolling mill bearing disassembly device according to claim 5, characterized in that, The swing angle of the pull claw (4) is ≤15°.

7. The short-stress rolling mill bearing disassembly device according to claim 1, characterized in that, The pull claw (4) has 2 to 4 claws, which are evenly distributed in a circle along the central axis of the pull screw (6).

8. The short-stress rolling mill bearing disassembly device according to claim 1, characterized in that, The retaining part is hook-shaped or slot-shaped.

9. The short-stress rolling mill bearing disassembly device according to claim 1, characterized in that, The bottom of the indexer (5) is fixedly connected to multiple protrusions. Each pull claw (4) has a long groove. The protrusions are inserted into the corresponding long grooves and slide along the long grooves.

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