Single-shaft drive roller detachable three-roller rolling mill

Abstract

The present invention relates to the technical field of bar rolling mills, and provides a three-roll rolling mill with a detachable single-axis transmission roller, comprising a frame and three sets of shaft assemblies arranged at 60 degrees to each other on the frame, wherein the frame is a split structure, and the three sets of shaft assemblies include a set of input long shaft assemblies and two sets of transmission short shaft assemblies, and the transmission short shaft assemblies are connected and transmitted with the input long shaft assemblies. The present invention adopts a split frame and adopts long and short shaft assemblies to form a three-roll rolling mill with a simple and reliable transmission structure, and the investment cost is greatly reduced through this more streamlined structure; when performing equipment maintenance, the rollers can be quickly removed by a quick disassembly method, and the accuracy of roller disassembly and installation is maintained, which does not affect the re-installation and use.

Description

Technical Field

[0001] The invention relates to the technical field of bar rolling mills, in particular to a three-roller bar and wire rolling mill, and in particular to a single-shaft drive roller-detachable three-roller rolling mill. Background Art

[0002] The three-roll rolling mills for bars commonly used in the industry currently include three-axis driven types and single-axis driven types. The three-axis driven three-roll rolling mill realizes rolling by synchronous rotation of three axes, while the single-axis driven three-roll rolling mill realizes rolling of bars by driving the other two axes to rotate through the input shaft.

[0003] When a three-axis drive rolling mill is rolling, the force on the rolled piece is balanced at three angles, and the rolling force of the roller is large. A single three-axis drive rolling mill requires each axis to have an independent power system or use multiple sets of reversing gearboxes to change the driving direction. The entire drive module transmission chain is relatively complex and the system cost is also high. When installing and maintaining the equipment, the three-axis drive type mostly uses a pressurized method to install and disassemble the rollers, which can be easily and quickly disassembled, repaired and installed.

[0004] The single-axis drive type rolling mill has a simple transmission system. The rolls in the rolling mill are fixedly installed. Without disassembling the frame body, the rolls cannot be quickly disassembled. The roll hole is easily worn in actual rolling, and the purpose of reducing the diameter is often not achieved due to excessive wear. The hole needs to be repaired after a period of use before it can be used again. When rolling metals with high strength and poor plasticity, such as tungsten, molybdenum, and titanium, a single-axis drive type rolling mill is used. The hole wear is large and the roll replacement frequency is high. The entire frame needs to be opened to achieve the disassembly and repair of the roll. After disassembling the frame, it is difficult to reinstall the components to the correct position. When it is reused after disassembly, the rolling process is often unreliable due to installation problems. Therefore, the time and capital cost of equipment maintenance are high. If the equipment is maintained without disassembling, the roll ring is retained on the frame for grinding and repair, which can achieve a good repair effect on the roll ring processing flat triangle hole type, but it is difficult to achieve a good repair effect on the roll ring processing arc triangle hole type and tangent hole type.

[0005] Therefore, there is still room for improvement in the existing three-roll bar rolling mill equipment, and it needs to be improved and optimized to obtain a more reasonable technical solution to solve the shortcomings in the existing technology. Summary of the invention

[0006] In order to overcome the defects of the prior art mentioned above, the present invention provides a single-axis drive three-roll rolling mill with detachable rolling rollers, which aims to improve the single-axis drive rolling mill and facilitate disassembly and installation for equipment maintenance, so as to achieve the purpose of rapid maintenance of equipment and accurate installation of components to ensure processing accuracy.

[0007] In order to achieve the above object, the technical solution specifically adopted by the present invention is:

[0008] A single-axis drive three-roller rolling mill with detachable rollers comprises a frame and three sets of shaft assemblies arranged at 60 degrees to each other on the frame, wherein the frame is a split structure, and the three sets of shaft assemblies comprise a set of input long shaft assemblies and two sets of transmission short shaft assemblies, wherein the transmission short shaft assemblies are connected with the input long shaft assemblies for transmission.

[0009] The three-roll rolling mill disclosed above has a split structure for its frame, which can be easily opened for disassembly and maintenance of the internal shaft components, thereby improving the efficiency of equipment installation and disassembly and reducing maintenance costs; at the same time, the two sets of transmission short shaft components are directly driven by the input long shaft component, which greatly simplifies the structure of the transmission component.

[0010] Furthermore, the input long shaft assembly transmits the driving force to the other two short shaft assemblies by connecting to an external driving device. The structure of the input long shaft assembly is described here, and the following feasible scheme is given: the input long shaft assembly includes a long tension rod, and a roller is arranged on the long tension rod. The roller is fixed on the long tension rod through a clamping flange A and a clamping flange B and rotates with the shaft; bevel gear sleeves are also arranged on the clamping flange A and the clamping flange B, respectively.

[0011] Furthermore, the input long shaft assembly is described in the above content, and a fixed flange A is rotatably sleeved on the clamping flange A and the clamping flange B, the front part of the fixed flange A forms a sealing structure with the clamping flange A and the clamping flange B, the rear part of the fixed flange A rotates relative to the bevel gear sleeve, and the tooth portion of the bevel gear sleeve protrudes from the rear part of the fixed flange A.

[0012] Furthermore, there are two fixed flanges A, which are relatively arranged on the frame to provide rotation space for the clamping flange A and the clamping flange B. The fixed flange A is connected and fixed to the frame, and the interior of the fixed flange A is a space for cylindrical rotation. In order to make the relative rotation between the clamping flange A, the clamping flange B and the fixed flange A smoother, a bearing is arranged on the fixed flange A. The bearing can be a cylindrical roller bearing. The inner ring of the cylindrical roller bearing is sleeved on the clamping flange A and the clamping flange B, and the outer ring is arranged in the rotation space of the fixed flange A; similarly, the bevel gear sleeve sleeved on the clamping flange A and the clamping flange B also rotates relative to the fixed flange A. A bearing is arranged between the fixed flange A and the bevel gear sleeve. A tapered roller bearing can be used here. The significance of such an arrangement is to offset the axial force generated on the bevel gear sleeve.

[0013] Furthermore, the power of the transmission short shaft assembly comes from the driving long shaft assembly. The structure of the transmission short shaft assembly can adopt a variety of schemes. Here, optimization is carried out and the following specific scheme is given: the transmission short shaft assembly includes a short tension rod, and a roller is arranged on the short tension rod. The roller is fixed on the short tension rod through a clamping flange C and a clamping flange D and rotates with the shaft; a bevel gear sleeve is arranged on the clamping flange D and meshes with the bevel gear sleeve of the clamping flange A or the clamping flange B.

[0014] Furthermore, similar to the driving long shaft assembly, the transmission short shaft assembly also requires external rotation space when rotating. According to the composition structure of the transmission short shaft assembly, optimization is carried out, and the following specific feasible scheme is given: the rotating sleeve on the clamping flange D is provided with a fixed flange B, the front part of the fixed flange B forms a sealing structure with the clamping flange D, the rear part of the fixed flange B rotates relative to the bevel gear sleeve, and the tooth part of the bevel gear sleeve protrudes from the rear part of the fixed flange D.

[0015] Furthermore, the clamping flange C on the transmission short shaft assembly also rotates relative to the frame. Specifically, a fixed flange C is rotatably sleeved on the clamping flange C, and the front portion of the fixed flange C and the clamping flange C form a sealing structure.

[0016] The relative arrangement of the fixed flange C and the fixed flange B provides a rotation space for the clamping flange C and the clamping flange D, so that the rollers on the short tension rod can maintain axial positioning and rotate with the shaft.

[0017] Both the fixed flange B and the fixed flange C are connected and fixed on the frame, and a rotation space is formed therein. In order to make the clamping flange C and the clamping flange D rotate more smoothly, cylindrical roller bearings are arranged on the clamping flange C and the clamping flange D; and in order to make the bevel gear sleeve rotate more smoothly, a tapered roller bearing is arranged between the bevel gear sleeve and the fixed flange B. The tapered roller bearing can help offset the axial force caused by the bevel gear sleeve.

[0018] Furthermore, the clamping flange A is provided with an adjustment flange A and a seal, the seal is located on the outside of the adjustment flange A, the adjustment flange A and the clamping flange A rotate relative to each other and the seal rotates synchronously with the clamping flange A; the clamping flange C is provided with an adjustment flange B and a seal, the seal is located on the outside of the adjustment flange B, the adjustment flange B and the clamping flange C rotate relative to each other and the seal rotates synchronously with the clamping flange C.

[0019] The adjusting flange A and the adjusting flange B are in contact with each other and fixedly arranged on the frame. The adjusting flange A and the adjusting flange B are both sleeved with bearings. The seal is located on the outside of the bearing and its function is to provide a sealing environment for the bearing and maintain the working stability of the bearing. A nut fastening member is arranged on the inside of the bearing. When the number of bearings is greater than one, components such as bushings or spacers are also required to be arranged between adjacent bearings for spacing and fastening.

[0020] Furthermore, a driving cone sleeve is provided at the rear end of the long tension rod, which is sleeved on the clamping flange A and rotates synchronously with the clamping flange A. A locking member A is also provided on the long tension rod to lock the driving cone sleeve and the clamping flange A.

[0021] The driving cone sleeve is provided with an oil hole, through which high-pressure hydraulic oil can be pumped into the rotating space formed by the clamping flange A and the clamping flange B to expand the center hole of the roller, making it convenient to pull out the long tension rod, thereby realizing the rapid disassembly of the roller.

[0022] Furthermore, a fixed cone sleeve is provided at the end of the short tension rod, and the fixed cone sleeve is sleeved on the clamping flange C and rotates coaxially with the clamping flange C. A locking piece B is also provided on the short tension rod to lock the fixed cone sleeve and the clamping flange C.

[0023] Similarly, an oil hole is also provided on the fixed cone sleeve, through which high-pressure hydraulic oil can be pumped into the rotating space formed by the clamping flanges C and D to expand the center hole of the roller, making it easier to pull out the short tension rod and achieve rapid disassembly of the roller.

[0024] Due to the provision of a driving cone sleeve and a fixed cone sleeve, the roller can be quickly disassembled by injecting high-pressure hydraulic oil without disassembling the frame, which is very convenient.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] The present invention adopts a split frame and adopts long and short shaft components to form a three-roller rolling mill with a simple and reliable transmission structure. This more streamlined structure greatly reduces the investment cost. When performing equipment maintenance, the rollers can be quickly removed by quick disassembly, maintaining the accuracy of roller disassembly and installation, and does not affect re-installation and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only represent some embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0028] Figure 1 It is a schematic diagram of the cross-sectional structure of a three-roll mill;

[0029] Figure 2 is a schematic cross-sectional structural diagram of a driving long shaft assembly;

[0030] Figure 3It is a schematic diagram of the cross-sectional structure of the transmission stub shaft assembly.

[0031] In the above drawings, the meanings of the marks are as follows: 1. frame; 2. driving long shaft assembly; 3. driving short shaft assembly; 4. rolling roller; 5. bevel gear sleeve; 6. outer nut A; 7. tapered roller bearing; 8. spacer; 9. round nut B; 10. round nut A; 11. cylindrical roller bearing; 12. fixing flange A; 13. clamping flange B; 14. clamping flange A; 15. long tension rod; 16. outer nut B; 17. bushing; 18. ball bearing; 19. adjustment flange A; 20. seal; 21. adjusting screw; 22. round nut C; 23. driving cone sleeve; 24. locking nut A; 25. clamping flange D; 26. clamping flange C; 27. fixing flange C; 28. adjusting flange B; 29. ​​fixing cone sleeve; 30. locking nut B; 31. short tension rod; 32. fixing flange B. DETAILED DESCRIPTION

[0032] The present invention will be further explained below in conjunction with the accompanying drawings and specific embodiments.

[0033] It should be noted that the description of these embodiments is used to help understand the present invention, but does not constitute a limitation of the present invention. The specific structures and functional details disclosed herein are only used to describe the exemplary embodiments of the present invention. However, the present invention can be embodied in many alternative forms, and it should not be understood that the present invention is limited to the embodiments set forth herein.

[0034] Example

[0035] like Figure 1 , Figure 2 and Figure 3 As shown, the three-roll mill used in this embodiment is mainly used for rolling bars, especially arc triangle hole type and tangent hole type bar rolling. One of the characteristics of the three-roll mill in this embodiment is that the transmission structure is simple, and the other two drive shafts are driven to rotate by one drive shaft. There is no complicated transmission structure, the installation is simple, the precision is higher, and it is stable and reliable for long-term use; another characteristic is that it is easy to disassemble and maintain, and the roller 4 can be quickly disassembled and installed without affecting the working precision.

[0036] A three-roller rolling mill with a single-axis drive roller 4 and detachable rollers comprises a frame 1 and three sets of shaft assemblies arranged at 60° to each other on the frame 1, wherein the frame 1 is a split structure, and the three sets of shaft assemblies comprise a set of input long shaft assemblies and two sets of transmission short shaft assemblies 3, wherein the transmission short shaft assemblies 3 are connected to the input long shaft assemblies for transmission.

[0037] The three-roll rolling mill disclosed above has a frame 1 with a split structure. Specifically, the frame 1 includes two parts that are interlocked with each other, each part has an installation position for installing a driving long shaft assembly 2 and a transmission short shaft assembly 3, which can be easily opened for disassembly and maintenance of the internal shaft assembly, thereby improving the efficiency of equipment installation and disassembly and reducing maintenance costs; at the same time, the two sets of transmission short shaft assemblies 3 are directly driven by the input long shaft assembly, which greatly simplifies the structure of the transmission assembly.

[0038] The input long shaft assembly transmits the driving force to the other two short shaft assemblies by connecting to an external driving device. The structure of the input long shaft assembly is described here, and the following feasible scheme is given: the input long shaft assembly includes a long tension rod 15, and a roller 4 is arranged on the long tension rod 15. The roller 4 is fixed on the long tension rod 15 through a clamping flange A14 and a clamping flange B13 and rotates with the shaft; bevel gear sleeves 5 are also arranged on the clamping flange A14 and the clamping flange B13 respectively.

[0039] Preferably, the front end of the long tension rod 15 is located at the clamping flange B13, and the long tension rod 15 is connected to the clamping flange B13 by threads. The rear end of the long tension rod 15 is located at one end of the clamping flange A14 and extends from the clamping flange A14. The rear end of the long tension rod 15 is connected to the driving device, which transmits the driving force to the clamping flange B13, driving the long tension rod 15 and the roller 4 on the short tension rod 31 to rotate.

[0040] The input long shaft assembly is described in the above content. The clamping flange A14 and the clamping flange B13 are both rotatably sleeved with a fixed flange A12. The front portion of the fixed flange A12 forms a sealing structure with the clamping flange A14 and the clamping flange B13. The rear portion of the fixed flange A12 rotates relative to the bevel gear sleeve 5, and the teeth of the bevel gear sleeve 5 protrude from the rear portion of the fixed flange A12.

[0041] There are two fixed flanges A12, which are relatively arranged on the frame 1 to provide rotation space for the clamping flange A14 and the clamping flange B13. The fixed flange A12 is connected and fixed to the frame 1, and the interior of the fixed flange A12 is a space for cylindrical rotation. In order to make the relative rotation between the clamping flange A14, the clamping flange B13 and the fixed flange A12 smoother, a bearing is arranged on the fixed flange A12, and the bearing can adopt a cylindrical roller bearing 11. The inner ring of the cylindrical roller bearing 11 is sleeved on the clamping flange A14 and the clamping flange B13, and the outer ring is arranged in the rotation space of the fixed flange A12; similarly, the bevel gear sleeve 5 sleeved on the clamping flange A14 and the clamping flange B13 also rotates relative to the fixed flange A12, and a bearing is arranged between the fixed flange A12 and the bevel gear sleeve 5, and a tapered roller bearing 7 can be adopted here. The significance of such arrangement is to offset the axial force generated on the bevel gear sleeve 5.

[0042] Preferably, when each cylindrical roller bearing 11 is set on the clamping flange A14 and the clamping flange B13, it is set in quantity two, and the outer ring and the inner ring of each cylindrical roller bearing 11 can be separated from each other; when each tapered roller bearing 7 is set, it is set in quantity two, and a spacer sleeve 8 is set between adjacent tapered roller bearings 7 for interval positioning, and at the same time, an outer nut A6 and a round nut B9 are set outside the tapered roller bearing 7 for limiting and tightening, and a round nut A10 is set outside the cylindrical roller bearing 11 for limiting and tightening.

[0043] The power of the transmission short shaft assembly 3 comes from the driving long shaft assembly 2. The structure of the transmission short shaft assembly 3 can adopt a variety of schemes. Here, they are optimized and the following specific schemes are given: the transmission short shaft assembly 3 includes a short tension rod 31, and a roller 4 is arranged on the short tension rod 31. The roller 4 is fixed on the short tension rod 31 through the clamping flange C26 and the clamping flange D25 and rotates with the shaft; a bevel gear sleeve 5 is arranged on the clamping flange D25 and is meshed with the bevel gear sleeve 5 of the clamping flange A14 or the clamping flange B13.

[0044] Preferably, the rollers 4 on the tension rod cooperate with each other and form an angle of 120°.

[0045] Preferably, the front end of the short tension rod 31 is located at the clamping flange D25, which is connected to the clamping flange through a thread and rotates synchronously; the rear end of the short tension rod 31 is located at the clamping flange C26, and the rear end of the end tension rod plays a role of tightening and fixing to maintain the integrity of the transmission short shaft assembly 3; the driving force of the transmission short shaft assembly 3 comes from the meshing transmission between the bevel gear sleeve 5 on the clamping flange D25 and the bevel gear sleeve 5 on the driving long shaft assembly 2.

[0046] Similar to the driving long shaft assembly 2, the transmission short shaft assembly 3 also requires external rotation space when rotating. According to the composition structure of the transmission short shaft assembly 3, optimization is carried out, and the following specific feasible solutions are given: the rotating sleeve on the clamping flange D25 is provided with a fixed flange B32, and the front part of the fixed flange B32 forms a sealing structure with the clamping flange D25, and the rear part of the fixed flange B32 rotates relative to the bevel gear sleeve 5, and the tooth part of the bevel gear sleeve 5 protrudes from the rear part of the fixed flange D.

[0047] The clamping flange C26 on the transmission stub shaft assembly 3 also rotates relative to the frame 1. Specifically, a fixed flange C27 is rotatably sleeved on the clamping flange C26, and the front portion of the fixed flange C27 forms a sealing structure with the clamping flange C26. In this embodiment, a labyrinth sealing structure is adopted.

[0048] The fixing flange C27 and the fixing flange B32 are arranged relative to each other to provide rotation space for the clamping flange C26 and the clamping flange D25, so that the roller 4 on the short tension rod 31 can maintain axial positioning and rotate with the shaft.

[0049] The fixing flange B32 and the fixing flange C27 are both connected and fixed on the frame 1, and a rotation space is formed therein. In order to make the clamping flange C26 and the clamping flange D25 rotate more smoothly, cylindrical roller bearings 11 are arranged on the clamping flange C26 and the clamping flange D25; and in order to make the bevel gear sleeve 5 rotate more smoothly, a tapered roller bearing 7 is arranged between the bevel gear sleeve 5 and the fixing flange B32. The tapered roller bearing 7 can help offset the axial force caused by the bevel gear sleeve 5.

[0050] Preferably, when each cylindrical roller bearing 11 is set on the clamping flange C26 and the clamping flange D25, it is set in quantity two, and the outer ring and the inner ring of each cylindrical roller bearing 11 can be separated from each other; when each tapered roller bearing 7 is set, it is set in quantity two, and a spacer sleeve 8 is set between adjacent tapered roller bearings 7 for spacing and positioning.

[0051] The clamping flange A14 is sleeved with an adjusting flange A19 and a sealing member 20, and the sealing member 20 is located on the outside of the adjusting flange A19. The adjusting flange A19 rotates relative to the clamping flange A14, and the sealing member 20 rotates synchronously with the clamping flange A14. The clamping flange C26 is sleeved with an adjusting flange B28 and a sealing member 20, and the sealing member 20 is located on the outside of the adjusting flange B28. The adjusting flange B28 rotates relative to the clamping flange C26, and the sealing member 20 rotates synchronously with the clamping flange C26.

[0052] The adjusting flange A19 and the adjusting flange B28 are in contact with and fixedly arranged on the frame 1. Bearings are sleeved inside the adjusting flange A19 and the adjusting flange B28. The seal 20 is located on the outside of the bearing, and its function is to provide a sealing environment for the bearing and maintain the working stability of the bearing. A nut fastening member is arranged on the inside of the bearing. When the number of bearings is greater than one, components such as a bushing 17 or a spacer 8 are also required to be arranged between adjacent bearings for spacing and fastening.

[0053] Preferably, in this embodiment, two sets of parallel ball bearings 18 are arranged between the adjustment flange A19 and the clamping flange A14, bushings 17 are arranged between adjacent ball bearings 18 for spacing and positioning, and external nuts B16 are arranged on the outer sides of the ball bearings 18 for limiting and blocking.

[0054] A round nut C22 is provided on the clamping flange A14 at the outer side of the seal 20 for adjusting the position of the adjustment flange A19 and tightening the seal; an adjusting screw 21 is provided on the adjustment flange A for helping to adjust and perform the adjustment flange A.

[0055] The rear end of the long tension rod 15 is provided with a driving cone sleeve 23, which is sleeved on the clamping flange A14 and rotates synchronously with the clamping flange A14. The long tension rod 15 is also provided with a locking member A to lock the driving cone sleeve 23 and the clamping flange A14.

[0056] Preferably, in this embodiment, the locking member A is a locking nut.

[0057] The driving cone sleeve 23 is provided with an oil hole, through which high-pressure hydraulic oil can be pumped into the rotating space formed by the clamping flange A14 and the clamping flange B13 to expand the center hole of the roller 4, making it convenient to pull out the long tension rod 15, thereby realizing the rapid disassembly of the roller 4.

[0058] The end of the short tension rod 31 is provided with a fixed cone sleeve 29, which is sleeved on the clamping flange C26 and rotates coaxially with the clamping flange C26. The short tension rod 31 is also provided with a locking piece B to lock the fixed cone sleeve 29 and the clamping flange C26.

[0059] Similarly, an oil hole is also provided on the fixed cone sleeve 29, through which high-pressure hydraulic oil can be pumped into the rotating space formed by the clamping flange C26 and the clamping flange D25 to expand the center hole of the roller 4, making it convenient to pull out the short tension rod 31 and realize the rapid disassembly of the roller 4.

[0060] Since the driving cone sleeve 23 and the fixed cone sleeve 29 are provided, the roller 4 can be quickly disassembled by injecting high-pressure hydraulic oil without disassembling the frame 1, which is very convenient.

[0061] The above are the embodiments of the present invention, but the present invention is not limited to the above optional embodiments. Those skilled in the art can arbitrarily combine the above methods to obtain other various embodiments. Anyone can obtain other various forms of embodiments under the enlightenment of the present invention. The above specific embodiments should not be understood as limiting the scope of protection of the present invention. The scope of protection of the present invention shall be based on the definition in the claims, and the description can be used to interpret the claims.

Claims

1. A three-roller rolling mill with detachable single-axis transmission rollers, comprising a frame (1) and three sets of shaft assemblies arranged on the frame (1) at 60° to each other, characterized in that: The frame (1) is a split structure, and the three sets of shaft assemblies include a set of input long shaft assemblies and two sets of transmission short shaft assemblies (3), and the transmission short shaft assemblies (3) are connected to the input long shaft assemblies for transmission; The input long shaft assembly comprises a long tension rod (15), on which a roller (4) is arranged, and the roller (4) is fixed on the long tension rod (15) through a clamping flange A (14) and a clamping flange B (13) and rotates with the shaft; the clamping flange A (14) and the clamping flange B (13) are also respectively provided with a bevel gear sleeve (5); The clamping flange A (14) and the clamping flange B (13) are both rotatably sleeved with a fixed flange A (12); the front portion of the fixed flange A (12) forms a sealing structure with the clamping flange A (14) and the clamping flange B (13); the rear portion of the fixed flange A (12) rotates relative to the bevel gear sleeve (5); and the tooth portion of the bevel gear sleeve (5) protrudes from the rear portion of the fixed flange A (12).

2. The single-shaft drive three-roller rolling mill with detachable rollers according to claim 1, characterized in that: A bearing is arranged between the fixing flange A (12) and the bevel gear sleeve (5).

3. The single-shaft drive three-roller rolling mill with detachable rollers according to claim 1, characterized in that: The transmission short shaft assembly (3) includes a short tension rod (31), on which a roller (4) is arranged. The roller (4) is fixed on the short tension rod (31) through a clamping flange C (26) and a clamping flange D (25) and rotates with the shaft; a bevel gear sleeve (5) is arranged on the clamping flange D (25) and meshes with the bevel gear sleeve (5) of the clamping flange A (14) or the clamping flange B (13).

4. The single-shaft drive three-roller rolling mill with detachable rollers according to claim 3, characterized in that: The clamping flange D (25) is rotatably sleeved with a fixed flange B (32), the front portion of the fixed flange B (32) and the clamping flange D (25) form a sealing structure, the rear portion of the fixed flange B (32) rotates relative to the bevel gear sleeve (5), and the teeth of the bevel gear sleeve (5) protrude from the rear portion of the fixed flange D.

5. The single-shaft drive three-roller rolling mill with detachable rollers according to claim 3, characterized in that: A fixed flange C (27) is rotatably sleeved on the clamping flange C (26), and the front part of the fixed flange C (27) forms a sealing structure with the clamping flange C (26).

6. The single-shaft drive three-roller rolling mill with detachable rollers according to claim 3, characterized in that: The clamping flange A (14) is sleeved with an adjusting flange A (19) and a sealing member (20), the sealing member (20) is located on the outer side of the adjusting flange A (19), the adjusting flange A (19) and the clamping flange A (14) rotate relative to each other, and the sealing member (20) rotates synchronously with the clamping flange A (14); the clamping flange C (26) is sleeved with an adjusting flange B (28) and a sealing member (20), the sealing member (20) is located on the outer side of the adjusting flange B (28), the adjusting flange B (28) and the clamping flange C (26) rotate relative to each other, and the sealing member (20) rotates synchronously with the clamping flange C (26).

7. The single-shaft drive three-roller rolling mill with detachable rollers according to claim 6, characterized in that: A driving cone sleeve (23) is provided at the end of the long tension rod (15), and the driving cone sleeve (23) is sleeved on the clamping flange A (14) and rotates synchronously with the clamping flange A (14). A locking piece A is also provided on the long tension rod (15) to lock the driving cone sleeve (23) and the clamping flange A (14).

8. The single-shaft drive three-roller rolling mill with detachable rollers according to claim 6, characterized in that: The end of the short tension rod (31) is provided with a fixed cone sleeve (29), which is sleeved on the clamping flange C (26) and rotates coaxially with the clamping flange C (26). The short tension rod (31) is also provided with a locking piece B to lock the fixed cone sleeve (29) and the clamping flange C (26).

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