Safe connecting device of sizing mill

Abstract

The utility model discloses a safety connecting device of a sizing mill, which relates to the technical field of sizing mills, and comprises a shear pin coupling, the shear pin coupling is fixedly connected with a rotating roller and an output shaft of a speed reducer motor, a driving component is mounted on the shear pin coupling, and the driving component consists of a driving motor and a screw rod; the lead screw is fixedly installed on an output shaft of the driving motor, a broken pin push-out assembly is installed on the shear pin coupling in a sliding mode, the broken pin push-out assembly is installed on the lead screw at the same time, and the driving assembly and the broken pin push-out assembly are arranged on the shear pin coupling and matched with each other; a plurality of broken cut-off pin bodies can be quickly and automatically pushed out of a plurality of first pin holes and a plurality of second pin holes at a time, the cleaning efficiency is remarkably improved, the downtime of equipment is shortened, meanwhile, due to the existence of the driving assembly and the broken pin pushing-out assembly, secondary damage possibly caused by manual operation is avoided, the reliability and safety of the equipment are ensured, and the service life of the equipment is prolonged. And the service life of the equipment is further prolonged.

Description

Technical Field

[0001] This utility model relates to the field of sizing machine technology, and in particular to a safety connection device for a sizing machine. Background Technology

[0002] The sizing mill is a key piece of equipment in metal rolling production lines (such as steel pipes, bars, and wire rods). It is primarily used for precise dimensional calibration and shape control of rolled products to ensure they meet specified diameter, roundness, and surface quality requirements. It typically occurs in the later stages of the rolling process and has a decisive impact on the final dimensional accuracy and performance of the product. During the operation of the sizing mill, the shear pin coupling, as an important safety connection device, is widely used in power transmission between the rollers and the reducer motor. Its core function is to cut off power transmission by breaking the shear pin under overload conditions, thus protecting the equipment from damage. This design effectively avoids severe equipment damage caused by overload or abnormal operating conditions, extending the equipment's service life.

[0003] However, existing shear pin couplings have a significant problem in practical use: removing the broken shear pin is cumbersome and inefficient. Traditional shear pin couplings typically consist of a drive unit, a transmission unit, and a shear pin connecting the two. When a shear pin breaks due to overload, the broken pin often remains inside the coupling's pin hole. Operators need to manually clean these remaining parts one by one using specialized tools, and sometimes even disassemble part of the coupling structure to complete the cleaning. This process is not only time-consuming and labor-intensive, increasing equipment downtime, but may also cause secondary damage to the pin hole or other components of the coupling due to improper operation, affecting the reliability and safety of the equipment. Therefore, this application proposes a safety connection device for a sizing machine to solve the above problems. Utility Model Content

[0004] The main purpose of this utility model is to provide a safe connection device for a sizing machine, which can effectively solve the problems in the background art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A safety connection device for a sizing machine includes a shearing pin coupling, which is fixedly connected to the output shaft of a rotating roller and a reducer motor. A drive assembly is mounted on the shearing pin coupling, which consists of a drive motor and a lead screw. The lead screw is fixedly mounted on the output shaft of the drive motor. A pin-breaking ejection assembly is slidably mounted on the shearing pin coupling and is also mounted on the lead screw. The pin-breaking ejection assembly consists of a C-shaped plate, an internally threaded tube, and extrusion pins. The internally threaded tube is fixedly inserted into the C-shaped plate, and several extrusion pins are fixedly mounted in a ring at one end of the C-shaped plate.

[0007] Preferably, the rotating roller is rotatably installed inside the housing, and the reducer motor is fixedly installed at one end of the housing.

[0008] Preferably, the shear pin coupling consists of a transmission tube, a first ring, a drive tube, a second ring, and a cut-off pin body. The first ring is fixedly installed at one end of the transmission tube, and the second ring is fixedly installed at one end of the drive tube. The first ring has a plurality of first pin holes in a ring shape, and the second ring has a plurality of second pin holes in a ring shape. The cut-off pin body is inserted into the first pin holes and the second pin holes.

[0009] Preferably, the transmission tube on the shear pin coupling is fixedly connected to the rotating roller, and the drive tube is fixedly connected to the output shaft of the reducer motor.

[0010] Preferably, the drive motor is fixedly mounted on the outer wall of the drive tube, and the lead screw is rotatably mounted on the second ring.

[0011] Preferably, the C-shaped plate on the pin ejection assembly is slidably sleeved on the drive tube, the internally threaded tube is mounted on the lead screw, and the extrusion pin is coaxial with the second pin hole.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] By installing a drive assembly and a broken pin ejection assembly on the shearing pin coupling, and having them work together, multiple broken cut pin bodies can be quickly and automatically ejected from multiple first pin holes and second pin holes in one go. This significantly improves cleaning efficiency and reduces equipment downtime. At the same time, the presence of the drive assembly and the broken pin ejection assembly avoids secondary damage that may be caused by manual operation, ensuring the reliability and safety of the equipment and further extending its service life. Attached Figure Description

[0014] Figure 1 5. A schematic diagram showing the positional relationship of the reducer motor in this utility model, comprising: shearing pin coupling, drive assembly, pin ejection assembly, and rotating roller;

[0015] Figure 2 This is a schematic diagram of the structure of the rotating roller, reducer motor, and housing of this utility model;

[0016] Figure 3 This is a schematic diagram of the disassembled structure of the shear pin coupling of this utility model.

[0017] Figure 4 This is a schematic diagram of the structure of the pin ejection component of this utility model.

[0018] In the diagram: 1. Shearing pin coupling; 2. Drive assembly; 3. Pin ejection assembly; 4. Rotary roller; 5. Reducer motor; 6. Housing; 7. Transmission tube; 8. First ring; 9. First pin hole; 10. Drive tube; 11. Second ring; 12. Second pin hole; 13. Cutting pin body; 14. Lead screw; 15. Drive motor; 16. C-shaped plate; 17. Internally threaded tube; 18. Extrusion pin. Detailed Implementation

[0019] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0020] Please see Figures 1-4As shown, a safety connection device for a sizing machine includes a shearing pin coupling 1, which is fixedly connected to the output shafts of a rotating roller 4 and a reducer motor 5. A drive assembly 2 is mounted on the shearing pin coupling 1, which consists of a drive motor 15 and a lead screw 14. The lead screw 14 is fixedly mounted on the output shaft of the drive motor 15. A pin-breaking ejection assembly 3 is slidably mounted on the shearing pin coupling 1 and is also mounted on the lead screw 14. The pin-breaking ejection assembly 3 consists of a C-shaped plate 16, an internally threaded tube 17, and pressing pins 18. The internally threaded tube 17 is fixedly inserted into the C-shaped plate 16. Several pressing pins 18 are fixedly mounted in a ring at one end of the C-shaped plate 16. The rotating roller 4 is rotatably mounted inside a housing 6. The reducer motor 5 is fixedly mounted on... Mounted at one end of housing 6, the shear pin coupling 1 consists of a transmission tube 7, a first ring 8, a drive tube 10, a second ring 11, and a cutting pin body 13. The first ring 8 is fixedly installed at one end of the transmission tube 7, and the second ring 11 is fixedly installed at one end of the drive tube 10. The first ring 8 has several first pin holes 9 arranged in a ring, and the second ring 11 has several second pin holes 12 arranged in a ring. The cutting pin body 13 is inserted into the first pin holes 9 and the second pin holes 12. The transmission tube 7 on the shear pin coupling 1 is fixedly connected to the roller 4, and the drive tube 10 is fixedly connected to the output shaft of the reducer motor 5. The drive motor 15 is a low-speed, high-torque motor, and its housing has a dedicated cable fixing groove. The power cord is securely fixed in the groove with nylon cable ties to ensure that it is protected when not in operation. The power cord will not come loose or become tangled under these conditions. The working process of the sizing machine is as follows: The reducer motor 5 drives the drive tube 10 and the second ring 11 of the shear pin coupling 1 to rotate through the output shaft. The drive tube 10 and the second ring 11 transmit power to the transmission tube 7 and the first ring 8 through the cut-off pin body 13, thereby driving the rotating roller 4 to rotate, realizing the dimensional calibration and shape control of the metal rolled products. When the sizing machine is overloaded or under abnormal conditions, the cut-off pin body 13 on the shear pin coupling 1 will break due to excessive shearing force, thereby cutting off the power transmission and protecting the equipment from damage. When the cut-off pin body 13 breaks, it needs to be disassembled and replaced. The specific steps are as follows: First, disconnect the power cord of the drive motor 15 from the drive motor 15, and then use the power cord to connect the drive motor 15 to the power supply. The motor 15 is connected to the power supply, and then the first ring 8 is rotated, so that the first pin hole 9 and the second pin hole 12 are coaxial. Then the drive motor 15 is started. At this time, the drive motor 15 will drive the lead screw 14 to rotate. The lead screw 14 drives the C-shaped plate 16 of the broken pin ejection assembly 3 to slide along the drive tube 10 through the internal thread tube 17. Then the pressing pin 18 on the C-shaped plate 16 moves and inserts into the second pin hole 12 and the first pin hole 9, so that all the broken cut pin bodies 13 are pushed out from the first pin hole 9 and the second pin hole 12 at one time. After cleaning, the drive motor 15 is reversed, which drives the lead screw 14 to reverse, thereby resetting the broken pin ejection assembly 3, so that the pressing pin 18 is removed from the first pin hole 9 and the second pin hole 12, ready for the next use.Then, the new cut-off pin body 13 is inserted into the first pin hole 9 and the second pin hole 12 to complete the replacement.

[0021] Specifically, the drive motor 15 is fixedly mounted on the outer wall of the drive tube 10, the lead screw 14 is rotatably mounted on the second ring 11, the C-shaped plate 16 on the pin-breaking ejection assembly 3 is slidably sleeved on the drive tube 10, the internally threaded tube 17 is mounted on the lead screw 14, and the pressing pin 18 is coaxial with the second pin hole 12. The installation position of the drive motor 15 is precisely calculated so that its center of gravity coincides with the axis of the drive tube 10, avoiding additional vibration caused by eccentric rotation. The lead screw 14 adopts a fine thread design, forming a precise fit with the internally threaded tube 17 to ensure a smooth and wobbly push-forward process. The C-shaped plate 16 is made of lightweight aluminum alloy, and its inner diameter maintains a clearance with the outer diameter of the drive tube 10. The design ensures smooth sliding while preventing radial runout; the end of the extrusion pin 18 is machined with a 15-degree guide cone angle to ensure precise insertion into the second pin hole 12 without damaging the hole wall; the overall weight of the assembly is balanced to prevent significant centrifugal force at the operating speed of the reducer motor 5; the power cord of the drive motor 15 uses oil-resistant rubber sheathed wire; the stroke limit of the pin-breaking ejection assembly 3 is controlled by the effective thread length of the lead screw 14 to ensure that its range of motion is always within the safe area between the second ring 11 and the drive motor 15; the dynamic balance level of all rotating parts at rated speed reaches the G6.3 standard to ensure that vibration requirements are still met after the drive assembly 2 is superimposed.

[0022] Ultimately, by setting the drive assembly 2 and the broken pin ejection assembly 3 on the shearing pin coupling 1, so that they cooperate with each other, multiple broken cut pin bodies 13 can be quickly and automatically ejected from multiple first pin holes 9 and second pin holes 12 in one go, which significantly improves cleaning efficiency and reduces equipment downtime. At the same time, the presence of the drive assembly 2 and the broken pin ejection assembly 3 avoids secondary damage that may be caused by manual operation, ensures the reliability and safety of the equipment, and further extends the service life of the equipment.

[0023] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A safety connection device for a sizing machine, comprising a shearing pin coupling (1), wherein the shearing pin coupling (1) is fixedly connected to the output shaft of a rotating roller (4) and a reducer motor (5), characterized in that: The shear pin coupling (1) is equipped with a drive assembly (2), which consists of a drive motor (15) and a lead screw (14). The lead screw (14) is fixedly installed on the output shaft of the drive motor (15). The shear pin coupling (1) is slidably equipped with a pin ejection assembly (3), which is also installed on the lead screw (14). The pin ejection assembly (3) consists of a C-shaped plate (16), an internal threaded tube (17), and a pressing pin (18). The internal threaded tube (17) is fixedly inserted into the C-shaped plate (16), and there are several pressing pins (18) which are fixedly installed in a ring at one end of the C-shaped plate (16).

2. The safety connection device for a sizing machine according to claim 1, characterized in that: The rotating roller (4) is rotatably installed inside the housing (6), and the reducer motor (5) is fixedly installed at one end of the housing (6).

3. The safety connection device for a sizing machine according to claim 2, characterized in that: The shear pin coupling (1) consists of a transmission tube (7), a first ring (8), a drive tube (10), a second ring (11), and a cut-off pin body (13). The first ring (8) is fixedly installed at one end of the transmission tube (7), and the second ring (11) is fixedly installed at one end of the drive tube (10). The first ring (8) has several first pin holes (9) in a ring shape, and the second ring (11) has several second pin holes (12) in a ring shape. The cut-off pin body (13) is inserted into the first pin holes (9) and the second pin holes (12).

4. The safety connection device for a sizing machine according to claim 3, characterized in that: The transmission tube (7) on the shear pin coupling (1) is fixedly connected to the rotating roller (4), and the drive tube (10) is fixedly connected to the output shaft of the reducer motor (5).

5. A safety connection device for a sizing machine according to claim 4, characterized in that: The drive motor (15) is fixedly installed on the outer wall of the drive tube (10), and the lead screw (14) is rotatably installed on the second ring (11).

6. A safety connection device for a sizing machine according to claim 5, characterized in that: The C-shaped plate (16) on the pin ejection assembly (3) is slidably sleeved on the drive tube (10), the internal thread tube (17) is installed on the lead screw (14), and the extrusion pin (18) is coaxial with the second pin hole (12).

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