Loop lifting and positioning device

Abstract

The utility model relates to a loop lifting and positioning device which comprises a lifting rack and a loop frame, lifting track groups are arranged at four corners of the lifting rack, and each lifting track group comprises two vertical track surfaces which are perpendicular to each other and are respectively a transverse track surface and a longitudinal track surface; lifting roller sets are arranged at the four corners of the loop frame, each lifting roller set comprises a transverse roller and a longitudinal roller, the transverse rollers run along the transverse rail faces, and the longitudinal rollers run along the longitudinal rail faces. According to the utility model, each corner of the loop frame can be lifted in two vertical track surfaces which are perpendicular to each other, so that the stable lifting of the loop is ensured, and the deviation of a strip is avoided.

Description

Technical Field

[0001] This utility model belongs to the field of metal strip processing technology, specifically relating to a looper lifting and positioning device. Background Technology

[0002] In industrial production equipment such as air cushion furnaces, a looper is a device used to store and regulate materials (such as metal strips). It typically consists of several rollers, a drive unit, and a control system. During strip processing, the looper of the air cushion furnace can adapt to different production speeds and control strip tension by raising and lowering, thereby meeting the process requirements of different products.

[0003] The looper needs to move synchronously and smoothly at all four corners during lifting to avoid uneven lifting that could cause the strip to deviate from its proper position on the looper rollers, affecting product quality. If the looper's lifting is uneven and causes the strip to deviate, then to ensure product quality, production operators need to readjust the strip's relative position on the machine line center using the S-roller after the looper is in place. In severe cases, even the S-roller cannot correct the strip deviation, seriously affecting the neatness of the strip winding, product quality, and production efficiency. Utility Model Content

[0004] The purpose of this utility model is to provide a looper lifting and positioning device, in which each corner of the looper frame can be lifted and lowered within two perpendicular vertical track planes, thereby ensuring the smooth lifting and lowering of the looper and preventing the strip from deviating.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a looper lifting and positioning device, comprising a lifting frame and a looper frame, wherein lifting rail groups are provided at each of the four corners of the lifting frame, and the lifting rail groups include two mutually perpendicular vertical rail surfaces, namely a transverse rail surface and a longitudinal rail surface; lifting roller groups are provided at each of the four corners of the looper frame, and the lifting roller groups include transverse rollers and longitudinal rollers, wherein the transverse rollers run along the transverse rail surface, and the longitudinal rollers run along the longitudinal rail surface.

[0006] Furthermore, at any corner position of the loop frame, the transverse roller is positioned below the loop frame, and the longitudinal roller is positioned above the loop frame.

[0007] Furthermore, at any corner position of the loop frame, the transverse roller is positioned above the loop frame, and the longitudinal roller is positioned below the loop frame.

[0008] Furthermore, in the width direction of the loop frame, two oppositely arranged transverse rollers run on two opposite transverse track surfaces to form a clamping action between the two transverse rollers and the two transverse track surfaces.

[0009] Furthermore, along the length of the looper frame, two opposing longitudinal rollers run on two opposing longitudinal track surfaces, so that the two longitudinal track surfaces clamp the looper frame.

[0010] Furthermore, both the transverse roller and the longitudinal roller are bearings.

[0011] Furthermore, the bearing is a cylindrical roller bearing.

[0012] Furthermore, the transverse roller or the longitudinal roller is mounted on a pin, which is fixed in the inner hole of the roller mounting seat, and the roller mounting seat is fixed to the upper or lower surface of the loose frame.

[0013] Furthermore, the roller mounting base is fixed to a connecting plate, which is fixed to the loose frame by connecting bolts.

[0014] Furthermore, connecting stiffeners are provided outside the connecting plate, and connecting bolts pass through the connecting stiffeners and the connecting plate to connect with the loose frame.

[0015] The beneficial effects of this utility model are as follows: Two sets of rollers are installed at each corner of the looper frame, ensuring that each corner of the looper frame can run within two mutually perpendicular track planes. This improves the stability of the looper's lifting and lowering, ensures the synchronization of the four corners of the looper, and enhances the load-bearing capacity of the looper, enabling it to adapt to complex working conditions. A detailed analysis follows:

[0016] 1. The improvement in stability is mainly reflected in the following two aspects: (1) Preventing the looper from tilting or swaying. The two sets of rollers at each corner of the looper frame run in two vertical track planes, which can support and constrain the looper from multiple directions. When the looper is subjected to external forces (such as uneven distribution of strip tension, vibration during equipment operation, etc.), the rollers in different track planes can cooperate with each other to offset part of the torque generated by the external forces, effectively preventing the looper from tilting or swaying, and keeping the looper in a stable posture during lifting and lowering; (2) Enhancing structural rigidity. The two sets of rollers at each corner of the looper frame are equivalent to forming multiple support points and constraint points between the looper frame and the lifting track, which increases the rigidity of the entire structure. This enables the looper to better resist deformation when bearing its own weight and strip tension, ensuring the structural stability of the looper and helping to extend the service life of the equipment.

[0017] 2. Ensure synchronous lifting and lowering of the four corners of the looper: The rollers in the two vertical track planes can provide precise guidance for the lifting and lowering of the looper. Whether the looper is rising or falling, the rollers can move precisely along their respective track planes, which ensures that the four corners of the looper can lift and lower synchronously at the same speed and trajectory.

[0018] 3. Increased load-bearing capacity of the looper frame: During operation, the looper needs to withstand significant weight, including the weight of its own frame, the rollers, and the tension of the strip. Installing two sets of rollers at each corner of the looper frame distributes this load across multiple rollers, reducing the load burden on individual rollers. This ensures that each roller bears only the load within its rated capacity, not only increasing the overall load-bearing capacity of the looper system but also reducing the risk of roller damage due to overload, thus improving equipment reliability.

[0019] 4. Adaptability to Complex Working Conditions: During the operation of the looper, it may be subjected to forces from different directions, such as lateral tension of the strip, wind force, and impact force generated by equipment vibration. The two sets of rollers at each corner of the looper frame can cope with forces from different directions in two vertical track planes, enabling the looper to better adapt to complex working conditions and improve the stability and safety of the equipment.

[0020] In this invention, the two rollers at each corner of the loop frame are located above and below the frame, respectively. This structural design can form a support structure similar to a "sandwich". Compared with the two rollers being located above or below the frame, this design can provide reliable support for the loop frame, enhance its anti-tilting ability, and improve its stability. Attached Figure Description

[0021] 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 only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structure of this utility model;

[0023] Figure 2 This is a partial sectional view of the column at one corner of the lifting frame in this utility model;

[0024] The markings in the diagram are: 1. Lifting frame, 2. Horizontal roller, 3. Elastic retaining ring, 4. Pin, 5. Roller mounting base, 6. Connecting bolt, 7. Connecting stiffener, 8. Connecting plate, 9. Loose frame, 10. Longitudinal roller, 11. Horizontal track surface, 12. Longitudinal track surface. Detailed Implementation

[0025] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present invention in any way.

[0026] like Figure 1As shown, a looper lifting and positioning device includes a lifting frame 1 and a looper frame 9. The looper frame 9 has a rectangular frame structure, and rollers in the looper are mounted on the looper frame 9. The looper frame 9 is vertically raised and lowered along the lifting frame 1 under the drive of a driving device. This driving device can be a chain mechanism, a lifting cylinder, or other common mechanisms capable of vertically raising and lowering the looper frame 9. Driving the looper frame 9 is not the technical problem to be solved by this utility model and is a mature technology in the field. Figure 1 The driving device is not shown in the figure, and the structure of the driving device will not be described in any further detail in this embodiment.

[0027] like Figure 2 As shown, the lifting frame 1 has four uprights at its four corners, and each upright is equipped with a lifting track assembly. The lifting track assembly includes two mutually perpendicular vertical track surfaces, namely a transverse track surface 11 and a longitudinal track surface 12. The transverse track surface 11 is parallel to the length direction of the loop frame 9, and the longitudinal track surface 12 is perpendicular to the length direction of the loop frame 9.

[0028] Each of the four corners of the loop frame 9 is equipped with a lifting roller assembly, which includes two rollers with perpendicular rolling axes: a transverse roller 2 and a longitudinal roller 10. The transverse roller 2 runs along the transverse track surface 11, and the longitudinal roller 10 runs along the longitudinal track surface 12.

[0029] Specifically, at any corner of the loop frame 9, the horizontal roller 2 and the vertical roller 10 are respectively positioned above and below the loop frame 9. For example... Figure 1 As shown, the transverse roller 2 is positioned below the loop frame 9, and the longitudinal roller 10 is positioned above the loop frame 9. In other embodiments, the transverse roller 2 may be positioned above the loop frame 9, and the longitudinal roller 10 may be positioned below the loop frame 9.

[0030] Preferably, on the looper frame 9, all four transverse rollers 2 are located below the looper frame 9, and all four longitudinal rollers 10 are located above the looper frame 9. Alternatively, all four transverse rollers 2 are located above the looper frame 9, and all four longitudinal rollers 10 are located below the looper frame 9.

[0031] When the loop frame 9 is lifted and lowered along the lifting frame 1 by the drive device, the two rollers with the two rolling axes at each corner of the loop frame 9 run on the mutually perpendicular transverse track surface 11 and longitudinal track surface 12, which can restrict the loop frame 9 in both the longitudinal and transverse directions and play a good positioning and guiding role. There are a total of 8 rollers at the four corners of the loop frame 9, which can effectively ensure the smooth lifting and lowering of the loop frame 9.

[0032] Furthermore, in the width direction of the looper frame 9, two opposing transverse rollers 2 run on opposing transverse track surfaces 11, forming a clamping effect between the transverse rollers 2 and these two transverse track surfaces 11, thereby preventing the looper frame 9 from swaying laterally. In the length direction of the looper frame 9, two opposing longitudinal rollers 10 run on opposing longitudinal track surfaces 12, forming a clamping effect between these two longitudinal track surfaces 12, thereby preventing the looper frame 9 from moving longitudinally. Therefore, through the cooperation of the track surfaces and corresponding rollers in the longitudinal and transverse directions, the smooth lifting and lowering of the looper is ensured.

[0033] In this embodiment, the transverse roller 2 and the longitudinal roller 10 have the same structure and the same installation method. The transverse roller 2 will be used as an example to further explain its structure and installation method.

[0034] The transverse roller 2 is a bearing mounted on a pin 4. One end of the pin 4 is welded and fixed in the inner hole of the roller mounting base 5, and the other end of the pin 4 is fitted with a retaining ring 3, which limits the relative position of the transverse roller 2 on the pin 4. The roller mounting base 5 is welded and fixed to the upper or lower surface of the loop frame 9.

[0035] Furthermore, the roller mounting base 5 is welded to a connecting plate 8, which is then fixed to the loose-fitting frame 9 by connecting bolts 6. Alternatively, a connecting rib 7 is provided on the outside of the connecting plate 8, and the connecting bolts 6 pass through the connecting rib 7 and the connecting plate 8 to connect to the loose-fitting frame 9. With this installation method, it is not necessary to weld the roller mounting base 5 to the loose-fitting frame 9, which facilitates subsequent disassembly and replacement.

[0036] Alternatively, in this embodiment, both the transverse roller 2 and the longitudinal roller 10 are cylindrical roller bearings, such as the NUP 2306em cylindrical roller bearing.

[0037] Using cylindrical roller bearings offers the following advantages:

[0038] (1) Greater load-bearing capacity. During the lifting and lowering operation of the looper, the rollers need to bear the weight of the looper frame 9 and the strip, etc. The high load-bearing capacity of the cylindrical roller bearings can ensure that the rollers can still operate normally when subjected to greater pressure, reducing bearing damage and equipment failure caused by overload.

[0039] (2) Low coefficient of friction. Cylindrical roller bearings have a low coefficient of rolling friction, which makes the rollers rotate more smoothly and effectively reduces energy loss during the lifting and lowering process of the looper. At the same time, the low coefficient of friction also helps to reduce wear between the rollers and the track, extend the service life of the equipment, and reduce maintenance costs.

[0040] (3) High operating accuracy. Cylindrical roller bearings have good rigidity and rotational accuracy, which can ensure that the rollers maintain high positional accuracy and stability when running along the track surface. This is very important for the looper system, because the looper needs to accurately control the tension and position of the strip. High-precision roller operation can avoid problems such as strip deviation and slack, and improve product quality.

[0041] Cylindrical roller bearings possess high load-carrying capacity, a low coefficient of friction, and good running accuracy. These characteristics work together to extend their service life under normal operating conditions. This reduces the frequency of bearing replacement, improving equipment reliability and production continuity.

[0042] In other embodiments, ball bearings can be used as the transverse and longitudinal rollers. Alternatively, wheels made of metal or wear-resistant materials can be used as the transverse and longitudinal rollers. The specific choice can be made according to the actual site conditions, with the aim of achieving smooth lifting and lowering of the looper and ensuring the product quality of the strip.

[0043] The above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Those skilled in the art should understand that modifications or equivalent substitutions can be made to the specific implementation of this utility model with reference to the above embodiments. Any modifications or equivalent substitutions that do not depart from the spirit and scope of this utility model are within the protection scope of the pending claims.

Claims

1. A looper lifting and positioning device, comprising a lifting frame and a looper frame, characterized in that: The lifting frame is equipped with lifting rail assemblies at all four corners. Each lifting rail assembly includes two mutually perpendicular vertical rail surfaces, namely a transverse rail surface and a longitudinal rail surface. The loop frame is equipped with lifting roller assemblies at all four corners. Each lifting roller assembly includes transverse rollers and longitudinal rollers. The transverse rollers run along the transverse rail surface, and the longitudinal rollers run along the longitudinal rail surface.

2. The looper lifting and positioning device according to claim 1, characterized in that: At any corner of the loop frame, the transverse roller is positioned below the loop frame, and the longitudinal roller is positioned above the loop frame.

3. The looper lifting and positioning device according to claim 1, characterized in that: At any corner of the loop frame, the transverse roller is positioned above the loop frame, and the longitudinal roller is positioned below the loop frame.

4. The looper lifting and positioning device according to claim 1, characterized in that: In the width direction of the looper frame, two oppositely arranged transverse rollers run on two opposite transverse track surfaces to form a clamping action between the two transverse rollers and the two transverse track surfaces.

5. The looper lifting and positioning device according to claim 1, characterized in that: Along the length of the looper frame, two opposing longitudinal rollers run on two opposing longitudinal rail surfaces, so that the two longitudinal rail surfaces clamp the looper frame.

6. The looper lifting and positioning device according to claim 1, characterized in that: Both the transverse roller and the longitudinal roller are bearings.

7. The looper lifting and positioning device according to claim 6, characterized in that: The bearing is a cylindrical roller bearing.

8. The looper lifting and positioning device according to claim 1, characterized in that: The transverse roller or the longitudinal roller is mounted on a pin, which is fixed in the inner hole of the roller mounting seat. The roller mounting seat is fixed to the upper or lower surface of the loose frame.

9. The looper lifting and positioning device according to claim 8, characterized in that: The roller mounting base is fixed to a connecting plate, which is fixed to the loose frame by connecting bolts.

10. The looper lifting and positioning device according to claim 9, characterized in that: Connecting stiffeners are also provided outside the connecting plate, and connecting bolts pass through the connecting stiffeners and the connecting plate to connect with the loose frame.

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