Transmission device for double-side transmission of high-speed wire rod roller way

Abstract

A transmission device for double-side transmission of a high-speed wire rod roller way comprises a roller, a bearing seat used for supporting the roller, a bearing installed in the bearing seat and a chain wheel installed on a shaft head at the end of the roller through a key, a positioning sleeve is welded to the inner side of the chain wheel, and the inner diameter of the positioning sleeve is equal to the outer diameter of an inner ring of the bearing. The bearing inner ring is sleeved with the positioning sleeve, and a fastening screw is arranged at the lap joint of the positioning sleeve and the bearing inner ring in the radial direction; and the inner ring of the bearing is in clearance fit with the supporting section of the roller shaft. According to the double-side transmission device for the high-speed wire rod roller way, due to the ingenious mechanical structure design, the influence of thermal expansion and contraction of the roller on a transmission system is successfully solved, and flexible and stable connection between the chain wheel and the roller is ensured. The device not only improves the transmission efficiency, but also reduces the maintenance cost and the safety risk, provides powerful guarantee for stable operation of a high-speed wire rod production line, and has remarkable technical advantages and practical application value.

Description

Technical Field

[0001] The utility model belongs to the technical field of high-speed wire rod roller table design, and particularly relates to a transmission device for double-side drive of a high-speed wire rod roller table. Background Art

[0002] In the field of high-speed wire rod production, the Stelmor air-cooled roller table (abbreviated as S / M roller table), as a key device, plays a crucial role in ensuring the uniform cooling of the wire rod and the quality of the final product. In the design of the S / M roller table, multiple drop sections are specifically set, and these drop sections usually adopt a double-side short roller configuration, aiming to optimize the cooling effect through a specific roller layout. In this configuration, the rollers in front of the short rollers need to be equipped with double-side sprockets to achieve effective transmission of the two-side short rollers.

[0003] However, in the actual production process, due to the variety of rolling products and different process requirements, the environmental temperature where the roller table is located varies significantly, resulting in a large amount of expansion and contraction of the rollers due to heat. This amount of expansion and contraction can usually reach 2-3 millimeters. In the traditional roller design, the drive side is set as the positioning end, while the non-drive side is the free end. Such a design allows the rollers to axially expand, contract, and move relative to the bearing housing after being heated, thus avoiding the direct influence of the thermal expansion and contraction of the rollers on the bearing housing and maintaining its stability and service life.

[0004] However, in the roller structure with double-side drive, since the sprocket at the free end is connected to the roller by a flat key, please refer to Figure 3 and Figure 4 , this connection method essentially belongs to an interference fit. At the same time, the bearing and the roller use T-shaped screws located in the keyway to transmit torque. When the roller expands and contracts due to heat, the sprocket will axially shift accordingly, resulting in displacement between the drive sprocket and the driven chain. This displacement not only affects the stability and accuracy of the transmission but also frequently causes accidents such as the drive chain falling off or breaking, seriously restricting the continuity and efficiency of the production line, increasing the maintenance cost and safety risks.

[0005] Therefore, aiming at the problem of the sprocket position shift caused by thermal expansion and contraction of the S / M roller table rollers after heating, and the resulting transmission failures, an innovative technical solution is urgently needed. This solution should be able to effectively eliminate the influence of the roller table temperature change on the transmission device, prevent the axial shift of the sprocket, ensure the stability and reliability of the transmission system, and thus improve the operation efficiency and product quality of the entire high-speed wire rod production line. Content of the Utility Model

[0006] Aiming at the problems existing in the prior art, the utility model provides a transmission device for double-side drive of a high-speed wire rod roller table.

[0007] The present utility model is realized as follows. A transmission device for bilateral drive of a high-speed wire rod roller path includes rollers, bearing seats for supporting the rollers, bearings installed in the bearing seats, and sprockets installed on the end shafts of the rollers. It is characterized in that: a positioning sleeve is welded to the inner side of the sprocket, the inner diameter of the positioning sleeve is equal to the outer diameter of the inner ring of the bearing, and the positioning sleeve is sleeved on the inner ring of the bearing. A fastening screw is provided in the radial direction at the overlapping part of the positioning sleeve and the inner ring of the bearing; the support section of the inner ring of the bearing and the roller shaft is in clearance fit.

[0008] Preferably, the positioning sleeve is welded to the inner side of the sprocket.

[0009] Preferably, the shaft head of the roller and the sprocket are connected by splines.

[0010] The advantages and technical effects of the present utility model: The present utility model proposes an innovative transmission device for bilateral drive of the S / M roller path of high-speed wire rods. This device integrates rollers, bearing seats, bearings, sprockets, and a unique positioning sleeve and set screw design, aiming to solve the problem of the position offset of the sprocket caused by thermal expansion and contraction of the roller after heating. A positioning sleeve is welded to the inner side of the sprocket. This positioning sleeve is precisely sleeved on the inner ring of the bearing and fixed by a radially arranged fastening screw. This design ensures that while the sprocket axially moves, it maintains a stable connection with the inner ring of the bearing, avoiding the problems brought by traditional interference fits.

[0011] A clearance fit is adopted between the bearing seat and the roller, providing the necessary space for the axial movement of the roller after thermal expansion, further eliminating the sprocket offset caused by the thermal expansion and contraction of the roller. This design not only improves the stability and reliability of the transmission device but also significantly reduces the risk of the transmission chain falling off or breaking, ensuring the continuity and efficiency of the production line.

[0012] The present utility model adopts spline connection, enabling axial movement between the sprocket and the roller, effectively coping with the expansion and contraction of the roller due to temperature changes.

[0013] In summary, the bilateral drive device of the high-speed wire rod roller path of the present utility model, through a clever mechanical structure design, successfully solves the influence of roller thermal expansion and contraction on the transmission system, ensuring a flexible and stable connection between the sprocket and the roller. This device not only improves the transmission efficiency but also reduces the maintenance cost and safety risk, providing a strong guarantee for the stable operation of the high-speed wire rod production line, and having significant technical advantages and practical application value. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is the structural schematic diagram of the present utility model;

[0015] Figure 2 is the structural schematic diagram of the sprocket of the present utility model;

[0016] Figure 3 is a schematic structural diagram of the prior art;

[0017] Figure 4 is a schematic structural diagram of a sprocket in the prior art.

[0018] In the figure, 1 is a roller; 2 is a bearing housing; 3 is a bearing; 4 is a sprocket; 5 is a positioning sleeve; 6 is a fastening screw. Specific embodiments

[0019] In order to make the objectives, technical solutions and advantages of the present utility model clearer and more understandable, the present utility model will be further described in detail below in conjunction with embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0020] Please refer to Figure 1 and Figure 2 , a transmission device for bilateral drive of a high-speed wire rod roller table, including a roller 1, a bearing housing 2 for supporting the roller, a bearing 3 installed in the bearing housing, and a sprocket 4 installed on the end shaft head of the roller. A positioning sleeve 5 is welded to the inner side of the sprocket. The inner diameter of the positioning sleeve is equal to the outer diameter of the inner ring of the bearing, and the positioning sleeve is sleeved on the inner ring of the bearing. A fastening screw 6 is provided in the radial direction at the lap joint of the positioning sleeve and the inner ring of the bearing, which not only ensures the stability of the sprocket during axial movement, but also effectively prevents the sprocket from detaching from the roller due to thermal expansion; the support section of the inner ring of the bearing and the roller shaft is in clearance fit, ensuring that the roller has enough space for axial movement after thermal expansion without being restricted by the bearing housing. This cooperation method not only reduces the stress concentration caused by thermal expansion and contraction, but also improves the overall stability and reliability of the transmission device.

[0021] Preferably, the positioning sleeve is welded to the inner side of the sprocket to form an integral structure with the sprocket, enhancing the stability of the connection between the sprocket and the roller. Even in a high-temperature environment, the sprocket can maintain a tight fit with the roller and is not prone to relative displacement.

[0022] Due to the design of the positioning sleeve, while the sprocket maintains a tight connection with the roller, it can also adapt to the axial movement of the roller caused by thermal expansion. This design avoids the axial stress on the sprocket caused by the thermal expansion and contraction of the roller in the traditional fixed connection method, thereby extending the service life of the transmission device.

[0023] The welded structure of the positioning sleeve and the sprocket reduces the loss of transmission efficiency caused by connection looseness or deviation. The sprocket and the roller always maintain a good meshing state, ensuring the effective transmission of the driving force and improving the overall operating efficiency of the production line.

[0024] In summary, the technical feature of welding the positioning sleeve to the inner side of the sprocket is not simply a change in the fixing method. From the perspective of the overall improvement effect, it plays an important role in improving the connection stability of the transmission device, allowing axial movement, increasing the transmission efficiency, simplifying the maintenance process, and enhancing adaptability. This design innovation effectively solves the problem of sprocket offset in the double-sided transmission device of the high-speed wire rod S / M roller path, providing a strong guarantee for the continuous and efficient operation of the production line.

[0025] Preferably, the shaft head of the roller is connected to the sprocket by a spline connection. The spline connection allows a certain degree of freedom of axial movement between the roller and the sprocket, effectively adapting to the expansion and contraction changes of the roller due to heat, and avoiding the offset or damage of the sprocket caused by restrictions. At the same time, the spline connection also provides good transmission efficiency and stability, ensuring the smooth transmission of power, and improving the reliability and service life of the entire transmission device.

[0026] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A transmission device for double-sided transmission of a high-speed wire roller table, comprising a roller, a bearing seat for supporting the roller, a bearing installed in the bearing seat, and a sprocket installed on the shaft head at the end of the roller through a key, characterized in that: A positioning sleeve is welded on the inner side of the sprocket, the inner diameter of the positioning sleeve is equal to the outer diameter of the bearing inner ring, and the positioning sleeve is sleeved on the bearing inner ring. Fastening screws are radially arranged at the overlap between the positioning sleeve and the bearing inner ring; the bearing inner ring and the supporting section of the roller shaft are clearance-fitted.

2. According to claim 1, the transmission device for double-sided transmission of high-speed wire roller table is characterized in that: The positioning sleeve is welded to the inner side of the sprocket.

3. The transmission device for double-sided transmission of high-speed wire roller table according to claim 1 is characterized in that: According to claim 1, it is characterized in that the connecting key between the shaft head of the roller and the sprocket is a spline.

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