Automatic coupling for seamless tube production sizing mill

Abstract

This utility model discloses an automatic coupling for a seamless pipe sizing machine, relating to the technical field of seamless pipe production equipment. It includes a spline head, with a reducer output shaft mounted at one end. The spline head and the reducer output shaft are connected by an interference fit heat fitting. This utility model reduces direct wear on the output shaft by using an interference fit heat fitting between the reducer output shaft and the spline head, avoiding the need to replace the reducer output shaft due to spline wear. This fundamentally eliminates the need to disassemble the entire reducer, significantly reducing maintenance difficulty. By adopting a split flange connection structure, when the spline head or inner spline sleeve wears, only the connecting bolts between the gland and the spline head need to be removed to replace the worn part, making maintenance convenient and significantly shortening downtime. The optimized coupling structure is simplified, improving fitting accuracy, and includes an elastic compensation structure to reduce impact wear, extend the overall service life of the coupling, and reduce equipment failure rate.

Description

Technical Field

[0001] This utility model relates to the technical field of seamless tube production equipment, specifically an automatic coupling for a seamless tube production sizing machine. Background Technology

[0002] In the 140 unit of the seamless pipe production line, the sizing mill is a key forming equipment. It adopts a nine-frame sizing mill transmission structure and is equipped with nine independently operating motors. Power distribution is achieved through a nine-in-one three-stage transmission reducer. Due to the large total mass of the reducer and the high installation accuracy requirements, the disassembly and assembly process is extremely complicated.

[0003] In the existing technology, the automatic coupling of the sizing mill and the output shaft of the reducer are connected by an involute spline to transmit power. This structure has the following problems: the spline fit clearance is large, and the spline wears severely after long-term operation; when the spline wears and needs to be replaced, the entire reducer and related bearings, gears and other components must be disassembled and reassembled to replace the gear shaft, resulting in a large amount of maintenance work and long downtime; at the same time, the original coupling has a complex design and many vulnerable parts, resulting in a low overall service life, which seriously affects the continuity of production and increases equipment maintenance costs. Utility Model Content

[0004] The purpose of this utility model is to provide an automatic coupling for a seamless tube production sizing machine, so as to solve the technical problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an automatic coupling for a seamless tube production sizing machine, including a spline head, one end of which is provided with a reducer output shaft;

[0006] The spline head and the reducer output shaft are connected by an interference fit heat fitting to avoid the need to replace the reducer output shaft due to spline wear. A flange structure is fitted on the surface of the spline head near the reducer output shaft. A pressure cap is provided on the side of the flange structure away from the reducer output shaft. An inner spline sleeve is fitted on the outer side of the spline head. A recessed stop is opened on the side of the pressure cap away from the flange structure. A convex stop is provided on the surface of the inner spline sleeve, which precisely matches the recessed stop. A pressure plate is provided on the inner side of the inner spline sleeve. A guide post connected to the inner spline sleeve is slidably connected to the inner side of the pressure plate. A guide spring is fitted on the outer side of the guide post, which abuts against the pressure plate and the inner spline sleeve, to reduce impact load.

[0007] Preferably, the flange structure and the gland are fixedly connected by high-strength bolts, and eight high-strength bolts are arranged at equal angles.

[0008] Preferably, the mating surface between the spline head and the inner spline sleeve is a precision involute spline.

[0009] Preferably, the spline head surface is nitrided to improve mating accuracy and wear resistance.

[0010] Preferably, the convex stop and the pressure cap are fixedly connected by connecting bolts, and eight connecting bolts are arranged at equal angles.

[0011] Preferably, the pressure plate includes an annular plate that abuts against the spline head and a guide cylinder disposed on the side of the annular plate away from the spline head, and the guide cylinder is used to prevent the annular plate from shifting.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. This automatic coupling for seamless tube sizing machines reduces direct wear on the output shaft by using an interference fit between the reducer output shaft and the spline head, thus avoiding the need to replace the reducer output shaft due to spline wear. This fundamentally eliminates the need to disassemble and reassemble the entire reducer, significantly reducing maintenance difficulty.

[0014] 2. The automatic coupling for the seamless pipe sizing machine adopts a split flange connection structure. When the spline head or inner spline sleeve is worn, the worn parts can be replaced simply by removing the connecting bolts between the gland and the spline head. This makes maintenance convenient and significantly reduces downtime.

[0015] 3. The automatic coupling for the seamless pipe sizing machine has an optimized structure that simplifies the coupling, improves fitting accuracy, and incorporates an elastic compensation structure to reduce impact wear, extend the overall service life of the coupling, and lower the equipment failure rate.

[0016] 4. The automatic coupling for the seamless pipe sizing machine is designed to fit the installation dimensions of the existing 140 sizing machine, eliminating the need to modify the reducer and frame and reducing upgrade costs. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0018] Figure 2 This is a three-dimensional cross-sectional structural diagram of the present invention;

[0019] Figure 3 This is a three-dimensional exploded view of the spline head and inner spline sleeve of this utility model;

[0020] Figure 4 This is a three-dimensional exploded view of the convex and concave stop of this utility model.

[0021] Figure 5 This is a three-dimensional exploded view of the pressure plate and guide column of this utility model.

[0022] In the diagram: 1. Spline head; 2. Inner spline sleeve; 3. Flange structure; 4. Gland; 5. High-strength bolt; 6. Pressure plate; 601. Guide post; 602. Guide spring; 7. Raised stop; 8. Recessed stop; 9. Connecting bolt; 10. Reducer output shaft. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figure 1 and Figure 2 This utility model provides a technical solution: an automatic coupling for a seamless tube production sizing machine, including a spline head 1, and a reducer output shaft 10 is provided at one end of the spline head 1;

[0025] exist Figure 1 and Figure 2 In the middle section, the spline head 1 and the reducer output shaft 10 are connected by an interference fit heat fitting to avoid the need to replace the reducer output shaft 10 due to spline wear.

[0026] Specifically, by using an interference fit heat-fit connection between the spline head 1 and the reducer output shaft 10, the direct wear of the reducer output shaft 10 can be reduced, thereby avoiding the need to replace the reducer output shaft 10 due to spline wear.

[0027] exist Figures 1-4 In the middle section: A flange structure 3 is fitted on the surface of the spline head 1 near the output shaft 10 of the reducer. A pressure cover 4 is provided on the side of the flange structure 3 away from the output shaft 10 of the reducer. The flange structure 3 and the pressure cover 4 are fixedly connected by high-strength bolts 5. Eight high-strength bolts 5 are arranged at equal angles. An inner spline sleeve 2 is fitted on the outer side of the spline head 1. The mating surface of the spline head 1 and the inner spline sleeve 2 adopts a precision involute spline. The surface of the spline head 1 is nitrided to improve the mating accuracy and wear resistance.

[0028] Specifically, by using precision involute splines on the mating surfaces of the spline head 1 and the inner spline sleeve 2, and by nitriding the surface of the spline head 1, the mating accuracy and wear resistance can be improved.

[0029] exist Figure 1 , Figure 2 and Figure 4In the middle: the pressure cover 4 has a recessed stop 8 on the side away from the flange structure 3, and the surface of the inner spline sleeve 2 is provided with a convex stop 7 that precisely matches the recessed stop 8. The convex stop 7 and the pressure cover 4 are fixedly connected by connecting bolts 9. There are eight connecting bolts 9 at equal angles.

[0030] Specifically, it can facilitate the formation of a detachable, modular structure, making it easy to replace individual components.

[0031] exist Figure 2 and Figure 5 In the middle: A pressure plate 6 is provided on the inner side of the inner spline sleeve 2. A guide post 601 connected to the inner spline sleeve 2 is slidably connected to the inner side of the pressure plate 6. A guide spring 602 is sleeved on the outer side of the guide post 601 and abuts against the pressure plate 6 and the inner spline sleeve 2. This is used to compensate for axial displacement during transmission and reduce impact load.

[0032] Specifically, the axial displacement during the transmission process is compensated by the cooperation of the pressure plate 6, the guide post 601 and the guide spring 602, thereby reducing the impact load.

[0033] exist Figure 2 and Figure 5 In the middle: the pressure plate 6 includes an annular plate that abuts against the spline head 1 and a guide cylinder disposed on the side of the annular plate away from the spline head 1.

[0034] Specifically, the guide tube guides the annular plate, preventing it from shifting.

[0035] The output shaft 10 of the reducer is heat-fitted with the spline head 1 to reduce direct wear of the output shaft and avoid the need to replace the output shaft 10 of the reducer due to spline wear. The flange structure 3 on the spline head 1 is fixedly connected to the cover 4 with high-strength bolts 5, and the other end of the cover 4 is precisely fitted to the inner spline sleeve 2 through the convex stop 7 and concave stop 8. The cover 4 and the inner spline sleeve 2 are fixedly connected by connecting bolts 9 to form a detachable split structure, which facilitates the replacement of partial components. A pressure plate 6 is set in the inner spline sleeve 2. The pressure plate 6 is connected by a guide post 601. A guide spring 602 is set between the pressure plate 6 and the inner spline sleeve 2 and sleeved on the outside of the guide post 601 to compensate for axial displacement during transmission and reduce impact load.

[0036] After installation, the automatic coupling operates stably, reducing the spline wear rate by more than 70%. When maintenance or replacement is required, only 8 bolts need to be removed to replace the spline head 1 or the inner spline sleeve 2. The replacement time for a single set of components is reduced from the original 8 hours to 1.5 hours, and the service life is extended by more than 120% compared to the original coupling, meeting the continuous production needs of the sizing machine.

[0037] Electrical equipment (including but not limited to motors, electric actuators, etc.) is safely powered by an external power source and controlled by a control box. The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0038] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An automatic coupling for a seamless pipe sizing machine, comprising a spline head (1), one end of which is provided with a reducer output shaft (10); characterized in that: The spline head (1) and the reducer output shaft (10) are connected by an interference fit heat fitting to avoid the need to replace the reducer output shaft (10) due to spline wear. The surface of the spline head (1) near the reducer output shaft (10) is fitted with a flange structure (3). A pressure cap (4) is provided on the side of the flange structure (3) away from the reducer output shaft (10). An inner spline sleeve (2) is fitted on the outside of the spline head (1). A recessed stop (8) is provided on the side of the pressure cap (4) away from the flange structure (3). A convex stop (7) is provided on the surface of the inner spline sleeve (2) to precisely match the recessed stop (8). A pressure plate (6) is provided on the inside of the inner spline sleeve (2). A guide post (601) connected to the inner spline sleeve (2) is slidably connected on the inside of the pressure plate (6). A guide spring (602) is fitted on the outside of the guide post (601) to abut against the pressure plate (6) and the inner spline sleeve (2) to reduce impact load.

2. The automatic coupling for a seamless tube sizing machine according to claim 1, characterized in that: The flange structure (3) and the gland (4) are fixedly connected by high-strength bolts (5), and eight high-strength bolts (5) are set at equal angles.

3. The automatic coupling for a seamless tube sizing machine according to claim 1, characterized in that: The mating surfaces of the spline head (1) and the inner spline sleeve (2) are made of precision involute splines.

4. The automatic coupling for a seamless tube sizing machine according to claim 3, characterized in that: The spline head (1) is nitrided to improve the fit accuracy and wear resistance.

5. An automatic coupling for a seamless tube sizing machine according to claim 1, characterized in that: The convex stop (7) and the pressure cap (4) are fixedly connected by connecting bolts (9), and there are eight connecting bolts (9) at equal angles.

6. An automatic coupling for a seamless tube sizing machine according to claim 1, characterized in that: The pressure plate (6) includes an annular plate that abuts against the spline head (1) and a guide cylinder disposed on the side of the annular plate away from the spline head (1), and the guide cylinder is used to prevent the annular plate from shifting.

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