A quick replacement device for universal shaft of rolling mill

Abstract

The utility model discloses a kind of rolling mill universal shaft quick replacement device, it is related to rolling mill equipment maintenance technical field, to solve the problem of artificial rope hoop tight operation complicated, low efficiency and difficult to guarantee balance in the existing universal shaft replacement process.The device includes the connecting seat connected with lifting rope, the symmetrical distribution of support frame one and support frame two are equipped in connecting seat lower side, two support frames are all equipped with clamping assembly;Clamping assembly includes fixed limit stop plate one and slidable limit stop plate two, limit stop plate two is adjusted position by rack, movable gear, and is locked and fixed by threaded shaft and limit nut.When replacing, two support frames are clamped from the both ends of universal shaft, are fixed by limit stop plate one and two cooperation, cooperate hoisting equipment to realize fast, balanced lifting off.The present application does not need artificial rope operation, clamping firm, high balance degree, significantly improve replacement efficiency, suitable for the maintenance replacement of various rolling mill universal shaft.

Description

Technical Field

[0001] This utility model relates to the field of rolling mill equipment maintenance and replacement technology, specifically to a quick replacement device for rolling mill universal joints. Background Technology

[0002] Rolling mills are the core equipment in metal rolling production. As a key component in the transmission system of rolling mills, universal joints are consumable parts that are subject to alternating loads and torques over long periods of time and require regular maintenance or replacement.

[0003] In current universal joint replacement processes, the lifting phase after disassembly typically involves manual operation using multiple ropes to tighten the universal joint in conjunction with hoisting equipment. This method has significant drawbacks: First, manually tightening the ropes is cumbersome, requiring multiple people to adjust the rope tension to ensure balance, which is time-consuming and labor-intensive; second, the contact between the ropes and the universal joint is a flexible connection, which can easily cause the universal joint to sway during lifting due to uneven force, posing a safety hazard; third, the overall replacement efficiency is low, significantly impacting the downtime for rolling mill maintenance and increasing production losses.

[0004] In the prior art, such as the "A device for replacing the universal joint of a vertical rolling mill in roughing and intermediate rolling" in patent number CN202321899862.3, a combination structure of balance lever and hook is used to achieve replacement through the principle of balance lifting. However, this device mainly relies on lever balance, and the fixing of the universal joint is still suspended. It does not solve the problems of rigid clamping and quick fixing, and its applicable scenarios are limited to vertical rolling mills, with poor versatility.

[0005] Therefore, there is an urgent need for a device that can achieve rapid and rigid clamping of the universal joint, ensure the balance of lifting and removing, and improve replacement efficiency. Summary of the Invention

[0006] The technical problem to be solved by this utility model is to provide a quick replacement device for the universal joint of a rolling mill, which realizes the quick and rigid clamping and balanced lifting of the universal joint, and solves the problems of cumbersome manual rope tightening operation, difficulty in ensuring balance and low efficiency when replacing the universal joint.

[0007] The technical solution adopted by this utility model to solve the above problems is as follows: a quick-change device for a rolling mill universal joint, comprising: a connecting seat, the top of which is used to connect with the lifting rope of an external hoisting device; a first support frame and a second support frame, symmetrically arranged on the lower side of the connecting seat and movable along the length of the connecting seat; a clamping assembly, respectively arranged on the side of the first support frame and the second support frame facing the universal joint, the clamping assembly including a first limiting plate fixed on the support frame and a second limiting plate slidably arranged on the support frame, the first limiting plate and the second limiting plate being arranged opposite to each other to form a clamping space; an adjusting limiting mechanism for driving the second limiting plate to slide and lock, the adjusting limiting mechanism including a rack fixed to the side of the second limiting plate, a movable gear meshing with the rack, a threaded shaft passing through the movable gear, and a limiting nut sleeved on the threaded shaft; when the movable gear rotates, it drives the second limiting plate to move closer to or away from the first limiting plate through the rack, and the limiting nut, after being tightened, abuts against the movable gear to restrict its rotation.

[0008] Preferably, the lower side of the connecting seat is provided with a guide rail extending along its length direction, and the top of the support frame one and the support frame two are provided with sliders adapted to the guide rail. The sliders can slide along the guide rail to adjust the distance between the two support frames.

[0009] Preferably, both the first support frame and the second support frame are provided with an adjustment seat, the second limiting plate is slidably disposed on the adjustment seat, the side of the adjustment seat is provided with a groove for guiding the sliding of the second limiting plate, and the rack is fixed to the side of the second limiting plate along the length of the groove.

[0010] Preferably, a laser light is included, which is fixed at the bottom center of the connector and the laser emission direction is perpendicular to the bottom surface of the connector; the laser light is used to emit laser light when the universal joint is clamped to help determine whether the center of the universal joint is aligned with the center of the connector.

[0011] Preferably, one end of the threaded shaft is rotatably connected to the support frame, and the other end extends to the outside of the support frame after passing through the movable gear. The limiting nut is threadedly connected to the outer end of the threaded shaft, and the diameter of the limiting nut is larger than the hole diameter of the movable gear.

[0012] Preferably, both the first limiting plate and the second limiting plate are provided with arc-shaped grooves on the side facing the universal joint, and the curvature of the arc-shaped grooves is adapted to the curvature of the outer circumference of the universal joint; an anti-slip pad is provided in the arc-shaped groove, and the anti-slip pad is made of rubber.

[0013] Preferably, the top of the connecting seat is provided with a connecting ring, the connecting ring is fixedly connected to the connecting seat by bolts, and the lifting rope is detachably connected to the connecting ring by a hook.

[0014] Preferably, the first support frame and the second support frame have identical structures and are symmetrically distributed about the central axis of the connecting seat; the lengths of the first support frame and the second support frame are adjustable, and their ends are provided with locking bolts for locking the length.

[0015] Preferably, the adjusting seat is provided with scale lines, which are distributed along the length of the slide groove to indicate the sliding distance of the limiting abutment plate two.

[0016] Working principle Position adjustment: Based on the length of the universal joint, slide support frame one and support frame two move along the guide rail so that they are located at the two ends of the universal joint respectively, and lock the slider position; based on the diameter of the universal joint, adjust the length of the support frame and fix it with the locking bolt.

[0017] Preliminary positioning: Turn on the laser light and adjust the position of the device so that the laser shines on the center of the universal joint to ensure the hoisting is balanced.

[0018] Clamping and fixing: Attach the arc-shaped groove of the first limiting plate to the surface of the universal joint; rotate the movable gear, which drives the second limiting plate to slide along the sliding groove of the adjusting seat through the rack until its arc-shaped groove is attached to the universal joint; tighten the limiting nut to press against the movable gear to prevent it from rotating, thus completing the rigid clamping.

[0019] Lifting operation: External lifting equipment lifts the connecting seat with lifting ropes, and with the secure fixing of the clamping components and the balance protection of laser positioning, the universal joint is lifted off smoothly.

[0020] Compared with the prior art, the present invention has the following beneficial effects: 1. Simple and efficient operation: No manual rope tightening is required. The mechanical adjustment and limit mechanism enables quick clamping and fixation. It can be operated by a single person, which greatly shortens the replacement time and improves efficiency by more than 30%.

[0021] 2. Secure and safe clamping: Rigid clamping components are used in conjunction with anti-slip pads to prevent the universal joint from shaking during the lifting process, thus reducing safety hazards.

[0022] 3. Controllable balance: Through laser positioning and symmetrical structural design, the center of the universal joint is aligned with the hoisting center, ensuring a smooth lifting process.

[0023] 4. High versatility: The spacing, length and limit plate spacing of the support frame are all adjustable, and it can be adapted to the universal joints of different specifications of rolling mills.

[0024] 5. Stable and reliable structure: The mechanical transmission and locking structure is simple, with a low failure rate and easy maintenance. Attached Figure Description

[0025] Figure 1: Schematic diagram of the overall structure of this utility model; Figure 2: Enlarged view of the clamping assembly and the adjustment and limiting mechanism; Figure 3: Schematic diagram of the connection between the connector and the guide rail; Figure 4: Schematic diagram of the clamping state between the limiting plate and the universal joint.

[0026] In the attached diagram: 1 - Mounting base, 2 - Connecting base, 3 - Pull rope, 4 - Support frame one, 5 - Support frame two, 6 - Limiting plate one, 7 - Limiting plate two, 8 - Connecting plate, 9 - Rack, 10 - Movable gear, 11 - Threaded shaft, 12 - Limiting nut, 13 - Guide rail, 14 - Adjusting base, 15 - Laser light, 16 - Bolt. Detailed Implementation

[0027] The technical solution of this utility model will be described in more detail below with reference to preferred embodiments. However, these embodiments are merely descriptions of preferred implementations of this utility model and should not be construed as limiting the scope of this utility model in any way.

[0028] As shown in Figures 1-4, a quick-change device for a rolling mill universal joint includes: The connecting seat 2 has a connecting ring (not shown in the figure) fixed at the top by bolts 16, and a guide rail 13 at the bottom; Support frame 1 4 and support frame 2 5, with the top slider slidably connected to the guide rail 13, and an adjustment seat 14 on the side, the length of which is adjusted by locking bolts (not shown in the figure); Limiting plate 1 6 is fixed to the end of the support frame, and limiting plate 2 7 is slidably disposed in the groove of the adjusting seat 14. Both are equipped with arc-shaped rubber anti-slip pads. The rack 9 is fixed to the side of the limiting plate 7 and meshes with the movable gear 10; the threaded shaft 11 passes through the movable gear 10, one end of which is rotatably connected to the support frame, and the other end is fitted with a limiting nut 12; Laser light 15 is fixed to the bottom center of connector 2.

[0029] Implementation steps: Before disassembling the universal joint, move the device to the location of the universal joint to be replaced, slide the support brackets 4 and 5 according to the length of the universal joint to match the distance between them, and lock the slider.

[0030] Adjust the lengths of support brackets 4 and 5 so that the height of the limiting plate 6 matches the axis of the universal joint, and tighten the length adjusting bolts.

[0031] Turn on the laser light 15, and move the device to align the laser point with the center of the universal joint to ensure the hoisting is balanced.

[0032] Place the arc-shaped groove of the limiting plate 6 against the surface of the universal joint, rotate the movable gear 10, and drive the limiting plate 7 to move towards the universal joint through the rack 9, referring to the scale line of the adjusting seat 14, until it is in close contact with the universal joint.

[0033] Tighten the limit nut 12 clockwise to press it against the movable gear 10 and lock the limit plate 7 in position.

[0034] The hoisting rope 3 of the external crane is connected to the connecting ring of the connecting seat 2 via the hook, and the universal joint is slowly lifted and smoothly lifted to the designated position.

[0035] When replacing the universal joint, simply reverse the installation process.

[0036] In this embodiment, the thickness of the rubber anti-slip pad is 5mm, and the coefficient of friction is ≥0.8; the irradiation distance of the laser lamp 15 is ≥2m, and the positioning error is ≤2mm; the meshing accuracy of the movable gear 10 and the rack 9 is grade 6 to ensure smooth adjustment.

[0037] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this invention should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A quick-change device for a rolling mill universal joint, characterized in that, include: A connecting seat, the top of which is used to connect to the lifting rope of an external hoisting device; support frame one and support frame two, symmetrically arranged on the lower side of the connecting seat, and movable along the length of the connecting seat; a clamping assembly, respectively arranged on the side of support frame one and support frame two facing the universal joint, the clamping assembly including a limiting plate one fixed on the support frame and a limiting plate two slidably arranged on the support frame, the limiting plate one and limiting plate two being arranged opposite to each other to form a clamping space; an adjusting limiting mechanism, used to drive the limiting plate two to slide and lock, the adjusting limiting mechanism including a rack fixed to the side of the limiting plate two, a movable gear meshing with the rack, a threaded shaft passing through the movable gear, and a limiting nut sleeved on the threaded shaft; when the movable gear rotates, it drives the limiting plate two to move closer to or away from the limiting plate one through the rack, and the limiting nut, after being tightened, abuts against the movable gear to restrict its rotation.

2. The quick-change device for the universal joint of a rolling mill according to claim 1, characterized in that: The lower side of the connecting seat is provided with a guide rail extending along its length direction, and the top of the support frame one and support frame two are provided with sliders adapted to the guide rail. The sliders can slide along the guide rail to adjust the distance between the two support frames.

3. The quick-change device for the universal joint of a rolling mill according to claim 1, characterized in that: Both the first and second support frames are equipped with adjustment seats. The second limiting plate is slidably mounted on the adjustment seat. The side of the adjustment seat is provided with a groove for guiding the sliding of the second limiting plate. The rack is fixed to the side of the second limiting plate along the length of the groove.

4. The quick-change device for the universal joint of a rolling mill according to claim 1, characterized in that: The device includes a laser light, which is fixed at the bottom center of the connector and the laser emission direction is perpendicular to the bottom surface of the connector. The laser light is used to emit laser light when the universal joint is clamped to help determine whether the center of the universal joint is aligned with the center of the connector.

5. A quick-change device for a rolling mill universal joint according to claim 1, characterized in that, One end of the threaded shaft is rotatably connected to the support frame, and the other end extends to the outside of the support frame after passing through the movable gear. The limiting nut is threadedly connected to the outer end of the threaded shaft, and the diameter of the limiting nut is larger than the hole diameter of the movable gear.

6. A quick-change device for a rolling mill universal joint according to claim 1, characterized in that: Both the first limiting plate and the second limiting plate are provided with arc-shaped grooves on the side facing the universal joint, and the curvature of the arc-shaped grooves is adapted to the curvature of the outer circumference of the universal joint; an anti-slip pad is provided in the arc-shaped groove, and the anti-slip pad is made of rubber.

7. A quick-change device for a rolling mill universal joint according to claim 1, characterized in that: The top of the connecting seat is provided with a connecting ring, which is fixedly connected to the connecting seat by bolts, and the lifting rope is detachably connected to the connecting ring by a hook.

8. A quick-change device for a rolling mill universal joint according to claim 1, characterized in that: The structure of support frame one and support frame two is exactly the same, and they are symmetrically distributed about the central axis of the connecting seat; the length of support frame one and support frame two is adjustable, and their ends are provided with locking bolts for locking the length.

9. A quick-change device for a rolling mill universal joint according to claim 3, characterized in that, The adjusting seat is provided with scale lines, which are distributed along the length of the slide groove to indicate the sliding distance of the limiting plate two.

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