Rolling mill connecting shaft balancing device and rolling mill

Abstract

The utility model provides a rolling mill connecting shaft balancing device and a rolling mill, and relates to the technical field of rolling mills, the rolling mill connecting shaft balancing device comprises a base, an upper balancing device and a lower balancing device, the upper balancing device comprises an upper lever structure, an upper hydraulic cylinder, an upper frame and an upper bearing seat; one end of the upper lever structure is rotationally connected with the movable end of an upper hydraulic cylinder arranged on the base, the other end of the upper lever structure is rotationally connected with the base, one end of the upper frame is rotationally connected with the middle of the upper lever structure, and the other end of the upper frame is provided with an upper bearing seat. The lower balancing device comprises a lower lever structure, a lower hydraulic cylinder, a lower frame and a lower bearing seat, one end of the lower lever structure is rotationally connected with the movable end of the lower hydraulic cylinder arranged on the base, the other end of the lower lever structure is rotationally connected with the base, and one end of the lower frame is rotationally connected with the middle of the lower lever structure; and a lower bearing seat is arranged at the other end of the lower frame. The running stability of the rolling mill can be improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to rolling mill technical field, specifically, relate to a rolling mill joint axle balancing unit and rolling mill. BACKGROUND

[0002] Rolling mill is a kind of mechanical equipment widely used in metal processing industry, and the main function is to change the cross-sectional shape, thickness or width of metal material by exerting mechanical force between two or more rolls. According to its working principle, structure and the type of applicable material, rolling mill can be divided into hot rolling mill, cold rolling mill, rough rolling mill and fine rolling mill and other types.

[0003] However, the main drive joint axle of rolling mill is usually large in mass, and in the normal rolling process, the weight of the main drive joint axle will act on the driving end or the work roll, which will generate a large additional load, which may cause excessive wear of the driving parts and the work roll, affecting the stability of the rolling mill operation. UTILITY MODEL CONTENTS

[0004] The problem solved by the utility model is: how to improve the stability of rolling mill operation.

[0005] To solve the above problems, the utility model provides a rolling mill joint axle balancing unit and rolling mill.

[0006] Firstly, the utility model provides a kind of rolling mill joint axle balancing unit, including base, upper balancing unit and lower balancing unit, the upper balancing unit includes upper lever structure, upper hydraulic cylinder, upper frame and upper bearing seat, one end of the upper lever structure is rotatably connected with the movable end of the upper hydraulic cylinder arranged on the base, the other end of the upper lever structure is rotatably connected with the base, one end of the upper frame is rotatably connected with the middle part of the upper lever structure, the other end of the upper frame is provided with the upper bearing seat, the lower balancing unit includes lower lever structure, lower hydraulic cylinder, lower frame and lower bearing seat, one end of the lower lever structure is rotatably connected with the movable end of the lower hydraulic cylinder arranged on the base, the other end of the lower lever structure is rotatably connected with the base, one end of the lower frame is rotatably connected with the middle part of the lower lever structure, the other end of the lower frame is provided with the lower bearing seat, the lower balancing unit is arranged between the upper bearing seat and the upper lever structure, the upper bearing seat is used to pass the upper main drive joint axle of rolling mill, and the lower bearing seat is used to pass the lower main drive joint axle of the rolling mill.

[0007] Optionally, the upper lever structure comprises a first lever assembly, a second lever assembly, a first pin shaft, a second pin shaft and a third pin shaft, one end of the first lever assembly is rotatably connected with the movable end of the upper hydraulic cylinder through the first pin shaft, the other end of the first lever assembly and one end of the second lever assembly are rotatably connected with the first support structure on the base through the second pin shaft respectively, the middle part of the first lever assembly and the other end of the second lever assembly are rotatably connected with one end of the upper frame through the third pin shaft respectively.

[0008] Optionally, the lower lever structure comprises a third lever assembly, a fourth lever assembly, a fourth pin shaft, a fifth pin shaft and a sixth pin shaft, one end of the third lever assembly is rotatably connected with the movable end of the lower hydraulic cylinder through the fourth pin shaft, the other end of the third lever assembly and one end of the fourth lever assembly are rotatably connected with the second support structure arranged on the first support structure through the fifth pin shaft respectively, the middle part of the third lever assembly and the other end of the fourth lever assembly are rotatably connected with one end of the lower frame through the sixth pin shaft respectively.

[0009] Optionally, the device further comprises an upper connecting rod, the upper connecting rod comprises a first screw buckle, a first screw rod and a second screw rod, the threaded end of the first screw rod is threadedly connected with one end of the first screw buckle, the other end of the first screw rod is fixedly connected with the upper frame, the threaded end of the second screw rod is threadedly connected with the other end of the first screw buckle, the other end of the second screw rod is fixedly connected with the second support structure.

[0010] Optionally, the device further comprises a lower connecting rod, the lower connecting rod comprises a second screw buckle, a third screw rod and a fourth screw rod, the threaded end of the third screw rod is threadedly connected with one end of the second screw buckle, the other end of the third screw rod is fixedly connected with the lower frame, the threaded end of the fourth screw rod is threadedly connected with the other end of the second screw buckle, the other end of the fourth screw rod is fixedly connected with the second support structure.

[0011] Optionally, the device further comprises an upper stop block assembly, the upper stop block assembly comprises an upper stop block body and an upper stop block base, the position of the upper stop block body arranged on the side of the first lever assembly close to the base matches the position of the upper stop block base arranged on the base, the upper stop block body is configured to abut against the upper stop block base when the upper hydraulic cylinder is not in action.

[0012] Optionally, the device further comprises a lower stopper assembly, the lower stopper assembly comprises a lower stopper body and a lower stopper base, the position of the lower stopper body arranged on the third lever assembly near the side of the base and the lower stopper base arranged on the base are matched, and the lower stopper body is configured to abut against the lower stopper base when the lower hydraulic cylinder is not in action.

[0013] Optionally, the upper bearing seat is rotatably connected with the other end of the upper frame through shaft ears arranged on both sides.

[0014] Optionally, the lower bearing seat is rotatably connected with the other end of the lower frame through shaft ears arranged on both sides.

[0015] In a second aspect, the utility model provides a rolling mill, comprising the rolling mill joint shaft balancing device as described above.

[0016] The rolling mill joint shaft balancing device has the following beneficial effects: the extension and contraction of the movable end of the upper hydraulic cylinder arranged on the base drives the upper lever structure to rotate around the rotary connection point connected with the base, and then drives the upper frame rotatably connected with the middle part of the upper lever structure to move, so that the upper main transmission joint shaft is supported by the upper bearing seat on the upper frame, the weight of the upper main transmission joint shaft is shared, the weight of the upper main transmission joint shaft is prevented from acting on the corresponding transmission end or work roll, the abrasion of the transmission component and the work roll is reduced, and the stability and safety of the rolling mill operation are improved. In addition, since the upper frame is rotatably connected with the middle part of the upper lever structure, the effort-saving lever formed by the upper lever structure and the upper hydraulic cylinder can provide greater support force for the upper main transmission joint shaft, and the stability of the rolling mill is further maintained. Similarly, the extension and contraction of the movable end of the lower hydraulic cylinder drives the lower lever structure to rotate around the rotary connection point connected with the base, and then drives the lower frame rotatably connected with the middle part of the lower lever structure to move, so that the lower main transmission joint shaft is supported by the lower bearing seat on the lower frame, the weight of the lower main transmission joint shaft is shared, the weight of the lower main transmission joint shaft is prevented from acting on the corresponding transmission end or work roll, the abrasion of the transmission component and the work roll is reduced, and the stability and safety of the rolling mill operation are improved. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a three-dimensional structure schematic view of the rolling mill joint shaft balancing device in the utility model embodiment;

[0018] Figure 2 It is a structure schematic view of the front view of the rolling mill joint shaft balancing device in the utility model embodiment;

[0019] Figure 3 It is a structure schematic view of the side view of the rolling mill joint shaft balancing device in the utility model embodiment;

[0020] Figure 4 It is the structure schematic view of the upper lever assembly of the rolling mill joint axle balancing device in the embodiment of the utility model;

[0021] Figure 5 It is the structure schematic view of the lower lever assembly of the rolling mill joint axle balancing device in the embodiment of the utility model.

[0022] Mark explanation:

[0023] 1-base; 11-first support structure; 12-second support structure; 2-upper balancing device; 21-upper lever structure; 211-first lever assembly; 212-second lever assembly; 213-first pin shaft; 214-second pin shaft; 215-third pin shaft; 22-upper hydraulic cylinder; 23-upper frame; 24-upper bearing seat; 3-lower balancing device; 31-lower lever structure; 311-third lever assembly; 312-fourth lever assembly; 313-fourth pin shaft; 314-fifth pin shaft; 315-sixth pin shaft; 32-lower hydraulic cylinder; 33-lower frame; 34-lower bearing seat; 4-upper connecting rod; 41-first spiral buckle; 42-first screw; 43-second screw; 5-lower connecting rod; 51-second spiral buckle; 52-third screw; 53-fourth screw; 6-upper stop block assembly; 61-upper stop block body; 62-upper stop block base; 7-lower stop block assembly; 71-lower stop block body; 72-lower stop block base; 8-upper main transmission joint axle; 9-lower main transmission joint axle. DETAILED DESCRIPTION

[0024] In order to make the above-mentioned purpose, features and advantages of the utility model more obvious and easy to understand, the specific embodiments of the utility model are described in detail below with reference to the drawings. Although some embodiments of the utility model are shown in the drawings, it should be understood that the utility model can be realized in various forms, and should not be interpreted as being limited to the embodiments described herein, on the contrary, these embodiments are provided to more thoroughly and completely understand the utility model. It should be understood that the drawings and embodiments of the utility model are only for illustrative purposes, and are not intended to limit the scope of protection of the utility model.

[0025] The term "comprising" and its variants as used herein are open-ended, i.e. "including but not limited to"; the term "based on" is "at least partially based on"; the term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments"; the term "optionally" means "optional embodiments". Related definitions of other terms will be given in the following description. It should be noted that the "first", "second", etc. concepts mentioned in the utility model are only used to distinguish different devices, modules or units, and are not intended to limit the order or interdependence of the functions performed by these devices, modules or units.

[0026] It should be noted that the modification of "one" and "multiple" in the utility model is illustrative rather than restrictive, and those skilled in the art should understand that unless otherwise explicitly indicated in the context, it should be understood as "one or more".

[0027] In the related art, the main drive coupling shaft of the rolling mill usually has a large mass, especially the main drive coupling shaft of the rough rolling mill. In the normal rolling process, the weight of the main drive coupling shaft acts on the driving end or the work roll, which generates a large additional load, which can cause excessive wear of the driving part and the work roll, and affect the stability and safety of the rolling mill operation. For example, in a long-time rolling work, the uneven stress of the work roll flat head and the excessive local pressure caused by the additional load accelerate the wear of the flat head and shorten the service life of the work roll.

[0028] In view of the problems in the above related art, the utility model provides a rolling mill coupling shaft balancing device and a rolling mill to provide support and balance for the main drive coupling shaft of the rolling mill, thereby ensuring the stability and safety of the rolling mill during operation. The following will be described in detail in combination with specific embodiments.

[0029] In combination with Figures 1 to 5 As shown in the utility model embodiment, the rolling mill coupling shaft balancing device comprises a base 1, an upper balancing device 2 and a lower balancing device 3. The upper balancing device 2 comprises an upper lever structure 21, an upper hydraulic cylinder 22, an upper frame 23 and an upper bearing seat 24. One end of the upper lever structure 21 is rotatably connected with the movable end of the upper hydraulic cylinder 22 arranged on the base 1. The other end of the upper lever structure 21 is rotatably connected with the base 1. One end of the upper frame 23 is rotatably connected with the middle part of the upper lever structure 21. The other end of the upper frame 23 is provided with the upper bearing seat 24. The lower balancing device 3 comprises a lower lever structure 31, a lower hydraulic cylinder 32, a lower frame 33 and a lower bearing seat 34. One end of the lower lever structure 31 is rotatably connected with the movable end of the lower hydraulic cylinder 32 arranged on the base 1. The other end of the lower lever structure 31 is rotatably connected with the base 1. One end of the lower frame 33 is rotatably connected with the middle part of the lower lever structure 31. The other end of the lower frame 33 is provided with the lower bearing seat 34. The lower balancing device 3 is arranged between the upper bearing seat 24 and the upper lever structure 21. The upper bearing seat 24 is used for penetrating the upper main drive coupling shaft 8 of the rolling mill. The lower bearing seat 34 is used for penetrating the lower main drive coupling shaft 9 of the rolling mill.

[0030] It should be noted that the main drive shaft of the rolling mill includes the upper main drive shaft 8 and the lower main drive shaft 9, and during the operation of the rolling mill, the rolling mill shaft balancing device provides support and balance for the upper main drive shaft 8 and the lower main drive shaft of the rolling mill, thereby maintaining the stability of the rolling mill during operation, that is, the upper main drive shaft 8 is arranged in the upper bearing seat 24, and the lower main drive shaft 9 is arranged in the lower bearing seat 34. Since the upper main drive shaft 8 and the lower main drive shaft are arranged in the vertical direction in sequence, the upper bearing seat 24 and the lower bearing seat 34 in the rolling mill shaft balancing device are also arranged in the vertical direction in sequence.

[0031] Specifically, the rolling mill shaft balancing device mainly comprises a base 1, an upper balancing device 2 and a lower balancing device 3, and the upper balancing device 2 and the lower balancing device 3 are arranged on the base 1. The upper balancing device 2 is composed of an upper lever structure 21, an upper hydraulic cylinder 22, an upper frame 23 and an upper bearing seat 24. The upper hydraulic cylinder 22 is arranged on the base 1, one end of the upper lever structure 21 is rotatably connected with the movable end of the upper hydraulic cylinder 22, and the other end of the upper lever structure 21 is rotatably connected with the base 1. The upper lever structure 21 plays a role of force transmission and balance adjustment. One end of the upper lever structure 21 is connected with the movable end of the upper hydraulic cylinder 22 through a suitable rotary connection mode (such as hinge connection, etc.), so that when the movable end of the upper hydraulic cylinder 22 extends or retracts, it can drive the upper lever structure 21 to rotate around the rotary connection point of the upper lever structure 21 and the base 1. The rotary connection between the upper lever structure 21 and the base 1 ensures the flexibility and stability of the movement. One end of the upper frame 23 is rotatably connected with the middle part of the upper lever structure 21, thereby forming a force-saving lever structure. When the upper lever structure 21 rotates, the upper frame 23 will correspondingly displace. The other end of the upper frame 23 is provided with the upper bearing seat 24. After the upper main drive shaft 8 passes through the upper bearing seat 24, it can stably rotate inside the upper bearing seat 24. The upper bearing seat 24 provides radial support for the upper main drive shaft 8 and reduces the rotating friction, thereby ensuring the stability and accuracy of the upper main drive shaft 8 during operation, and thus ensuring the efficient operation of the upper part of the rolling mill drive system. The upper hydraulic cylinder 22 can adjust the position and posture of the upper lever structure 21 by extending and retracting, and then apply appropriate balancing force to the upper frame 23 and the upper main drive shaft 8, so as to offset various unbalanced forces generated during the operation of the rolling mill, such as gravity, inertia force, etc., to prevent the upper main drive shaft 8 from being worn out, vibrating too much or even damaged due to uneven force. And the load pressure of the upper main drive shaft 8 of the rolling mill can be effectively shared to the upper hydraulic cylinder 22 and the upper lever structure 21 through the upper frame 23. The upper lever structure 21 divides the larger load force into smaller forces through reasonable force arm configuration, which is borne by the upper hydraulic cylinder 22. Compared with directly supporting the gravity of the upper main drive shaft 8 of the rolling mill, this way can reduce the pressure borne by a single supporting component, so that the whole system is more stable and reliable when bearing a larger load, thereby ensuring the stability of the rolling mill during operation.

[0032] Further, since the upper main drive shaft 8 and the lower main drive shaft 9 are arranged in sequence in the vertical direction, in the balancing device of the present embodiment, the upper bearing seat 24 and the lower bearing seat 34 for passing the upper main drive shaft 8 and the lower main drive shaft 9 also need to be arranged in sequence in the vertical direction. The lower balancing device 3 is located between the upper bearing seat 24 and the upper lever structure 21, that is, the lower balancing device 3 needs to be arranged between the region formed by the upper shaft seat, the upper frame 23 and the upper lever structure 21. The lower balancing device 3 is mainly composed of a lower lever structure 31, a lower hydraulic cylinder 32, a lower frame 33 and a lower bearing seat 34. The lower hydraulic cylinder 32 is also arranged on the base 1. In order to avoid mutual influence with the upper lever structure 21, the lower lever structure 31 is slightly higher than the upper lever structure 21 in the vertical direction. In order to match the lower lever structure 31, the lower hydraulic cylinder 32 is arranged at a corresponding position and height on the base 1, which should match the lower lever structure 31, so that one end of the lower lever structure 31 is rotationally connected with the movable end of the lower hydraulic cylinder 32. The other end of the lower lever structure 31 is rotationally connected with the base 1. In order to ensure that the lower lever structure 31 can have a larger rotation angle, a support structure can be added. One end of the support structure is arranged on the base 1, and the other end of the support structure is rotationally connected with the other end of the lower lever structure 31. The lower lever structure 31 is driven to rotate around the rotation connection point by the action of the lower hydraulic cylinder 32, so as to change the transmission and distribution of force. One end of the lower frame 33 is rotationally connected with the middle part of the lower lever structure 31. When the lower lever structure 31 rotates, the lower frame 33 also links with it. The other end of the lower frame 33 is provided with the lower bearing seat 34, which is located below the upper bearing seat 24 and is used for passing the lower main drive shaft 9 of the rolling mill. The lower main drive shaft 9 can stably rotate after passing through the lower bearing seat 34. The lower bearing seat 34 provides reliable support for the lower main drive shaft 9 and reduces the rotation resistance. The lower hydraulic cylinder 32 adjusts the state of the lower lever structure 31, and the lower frame 33 applies a balancing force to the lower main drive shaft 9, so as to ensure that the lower main drive shaft 9 is balanced in force during the operation of the rolling mill, to ensure the stable operation of the lower part of the rolling mill drive system, and to work together with the upper balancing device 2 to make the main drive system of the entire rolling mill work in a balanced and stable state, improve the rolling precision of the rolling mill, prolong the service life of the equipment and reduce the probability of equipment failure.

[0033] It should be noted that, in order to maintain the stability of control, the height of the lower hydraulic cylinder 32 and the upper hydraulic cylinder 22 can be uniformly set. At this time, one end of the upper lever structure 21 needs to be adjusted, that is, the side ear is extended out along the vertical direction, and then the height of the side ear is matched with the height of the lower lever structure 31, so that the side ear and the movable end of the upper hydraulic cylinder 22 after adjustment are rotationally connected, and the upper lever structure 21 and the lower lever structure 31 are synchronously controlled by the upper hydraulic cylinder 22 and the lower hydraulic cylinder 32 with the same height.

[0034] In this embodiment, the extension and retraction of the movable end of the upper hydraulic cylinder 22 arranged on the base 1 drives the upper lever structure 21 to rotate around the rotating connection point with the base 1, and further drives the upper frame 23 rotatingly connected to the middle part of the upper lever structure 21 to move, so as to support the upper main transmission shaft 8 through the upper bearing seat 24 on the upper frame 23, share the weight of the upper main transmission shaft 8, avoid the weight of the upper main transmission shaft 8 acting on the corresponding transmission end or work roll, reduce the wear of the transmission components and the work roll, and improve the stability and safety of the rolling mill operation. Moreover, since the upper frame 23 is rotatingly connected to the middle part of the upper lever structure 21, the effort-saving lever formed by the upper lever structure 21 and the upper hydraulic cylinder 22, i.e. by pushing one end of the upper lever structure 21 with the movable end of the upper hydraulic cylinder 22, makes the upper lever structure 21 rotate around the rotating connection point of the other end of the upper lever structure 21 with the base 1. At this time, the length of the force arm of the upper hydraulic cylinder 22 pushing the upper lever structure 21 is the length from one end of the upper lever structure 21 to the other end, and the upper frame 23 is located at the middle part of the upper lever structure 21. Therefore, the length of the force arm from the upper frame 23 to the rotating fulcrum point of the upper lever structure 21 on the base 1 is smaller than the length of the force arm from the upper hydraulic cylinder 22 to the rotating fulcrum point of the upper lever structure 21 on the base 1. According to the lever principle, for the same fulcrum point, the longer the corresponding force arm of the upper hydraulic cylinder 22, the smaller the force of the upper hydraulic cylinder 22 pushing the upper lever structure 21, i.e. the same hydraulic cylinder can push a larger weight, so as to provide a larger support force for the upper main transmission shaft 8, and further maintain the stability of the rolling mill. Similarly, the extension and retraction of the movable end of the lower hydraulic cylinder 32 drives the lower lever structure 31 to rotate around the rotating connection point with the base 1, and further drives the lower frame 33 rotatingly connected to the middle part of the lower lever structure 31 to move, so as to support the lower main transmission shaft 9 through the lower bearing seat 34 on the lower frame 33, share the weight of the lower main transmission shaft 9, avoid the weight of the lower main transmission shaft 9 acting on the corresponding transmission end or work roll, reduce the wear of the transmission components and the work roll, and improve the stability and safety of the rolling mill operation.

[0035] Optionally, in combination with Figures 1 to 4 As shown in the figure, the upper lever structure 21 comprises a first lever assembly 211, a second lever assembly 212, a first pin shaft 213, a second pin shaft 214 and a third pin shaft 215. One end of the first lever assembly 211 is rotatingly connected to the movable end of the upper hydraulic cylinder 22 through the first pin shaft 213. The other end of the first lever assembly 211 and one end of the second lever assembly 212 are respectively rotatingly connected to the first support structure 11 on the base 1 through the second pin shaft 214. The middle part of the first lever assembly 211 and the other end of the second lever assembly 212 are respectively rotatingly connected to one end of the upper frame 23 through the third pin shaft 215.

[0036] Specifically, the upper lever mechanism is mainly composed of a first lever assembly 211, a second lever assembly 212, a first pin shaft 213, a second pin shaft 214 and a third pin shaft 215. The first lever assembly 211 mainly functions as a force-saving lever. One end of the first lever assembly 211 is rotatably connected to the movable end of the upper hydraulic cylinder 22 through the first pin shaft 213, and the other end of the first lever assembly 211 is rotatably connected to the first support mechanism on the base 1 through the second pin shaft 214. Thus, the extension and retraction of the movable end of the upper hydraulic cylinder 22 can drive the first lever assembly 211 to rotate around the rotation connection point of the first support structure 11 arranged on the base 1. When the first lever rotates, the upper frame 23 rotatably connected to the middle part of the first lever assembly 211 is driven to move, thereby supporting the upper main transmission shaft 8 passing through the upper bearing seat 24. The force-saving lever structure composed of the first lever assembly 211, the upper hydraulic cylinder 22 and the upper frame 23 can provide more sufficient and stable support for the upper main transmission shaft 8, thereby sharing the weight of the upper main transmission shaft 8 and maintaining the stability and safety of the rolling mill. Meanwhile, since the upper bearing seat 24 is arranged at the other end of the upper frame 23, the span of the upper frame 23 is large. In order to maintain the stability of the connection between the upper lever structure 21 and the upper frame 23, the second lever assembly 212 is arranged between the second pin shaft 214 and the third pin shaft 215, that is, one end of the second lever assembly 212 is rotatably connected to the upper frame 23 through the second pin shaft 214, and the other end of the second lever assembly 212 is rotatably connected to the base 1 through the third pin shaft 215. That is to say, the second pin shaft 214 is rotatably connected to the first lever assembly 211, the second lever assembly 212 and the upper frame 23, respectively, and the third pin shaft 215 is rotatably connected to the first support structure 11 on the base 1 through the first lever assembly 211 and the second lever assembly 212, respectively. Thus, the first lever assembly 211 and the second lever assembly 212 can rotate around the rotation connection point on the first support structure 11. In order to further strengthen the stability of the structure of the upper frame 23, a cross beam is arranged at the end of the upper frame 23 close to the upper bearing seat 24, and the struts on both sides of the upper frame 23 are connected through the cross beam.

[0037] Optionally, as Figure 1 and 3As shown, the lower lever structure 31 comprises a third lever assembly 311, a fourth lever assembly 312, a fourth pin shaft 313, a fifth pin shaft 314 and a sixth pin shaft 315, one end of the third lever assembly 311 is rotatably connected with the movable end of the lower hydraulic cylinder 32 through the fourth pin shaft 313, the other end of the third lever assembly 311 and one end of the fourth lever assembly 312 are respectively rotatably connected with the second support structure 12 provided on the first support structure 11 through the fifth pin shaft 314, the middle part of the third lever assembly 311 and the other end of the fourth lever assembly 312 are respectively rotatably connected with one end of the lower frame 33 through the sixth pin shaft 315.

[0038] Specifically, the lower lever structure 31 mainly comprises the third lever assembly 311, the fourth lever assembly 312, the fourth pin shaft 313, the fifth pin shaft 314 and the sixth pin shaft 315, the third lever assembly 311 also functions as a force-saving lever, one end of the third lever assembly 311 is rotatably connected with the movable end of the lower hydraulic cylinder 32 through the fourth pin shaft 313, the other end of the third lever assembly 311 is rotatably connected with the second support structure 12 provided on the first support structure 11 through the fifth pin shaft 314, so that the extension and retraction of the movable end of the lower hydraulic cylinder 32 can drive the third lever assembly 311 to rotate around the rotatable connection point provided on the second support structure 12, when the third lever rotates, the lower frame 33 rotatably connected with the middle part of the third lever assembly 311 moves, thereby supporting the lower main transmission arbor 9 passing through the lower bearing seat 34. The force-saving lever structure formed by the third lever assembly 311, the lower hydraulic cylinder 32 and the lower frame 33 can provide more sufficient and stable support for the lower main transmission arbor 9, thereby sharing the weight of the lower main transmission arbor 9 and maintaining the stability and safety of the rolling mill operation. Meanwhile, since the lower bearing seat 34 is arranged at the other end of the lower frame 33, the span of the lower frame 33 is large, in order to maintain the stability of the connection between the lower lever structure 31 and the lower frame 33, the fourth lever assembly 312 is arranged between the fourth pin shaft 313 and the sixth pin shaft 315, that is, one end of the fourth lever assembly 312 is rotatably connected with the lower frame 33 through the fourth pin shaft, the other end of the fourth lever assembly 312 is rotatably connected with the second support structure 12 through the fifth pin shaft 314, that is, the sixth pin shaft 315 is rotatably connected with the third lever assembly 311, the fourth lever assembly 312 and the lower frame 33 respectively, and the fifth pin shaft 314 is rotatably connected with the second support structure 12 provided on the first support structure 11 through the third lever assembly 311 and the fourth lever assembly 312 respectively, so that the third lever assembly 311 and the fourth lever assembly 312 can rotate around the rotatable connection point on the second support structure 12, and in order to further strengthen the stability of the structure of the lower frame 33, a cross beam is arranged at the end of the lower frame 33 close to the lower bearing seat 34, the struts on both sides of the lower frame 33 are connected through the cross beam.

[0039] It should be noted that one end of the first support structure 11 is arranged on the base 1, and the other end is rotatably connected with the other end of the upper lever structure 21, thereby providing a rotating fulcrum for the upper lever structure 21. Since the lower lever structure 31 is higher than the upper lever structure 31, in order to maintain the rotating angle of the lower lever structure 31, a second support structure 12 can be arranged on the first support structure 11, thereby rotatably connecting the other end of the lower lever structure 31 with the upper end of the second support structure, so that the rotating point formed thereby matches the position of the lower lever structure 31, and provides sufficient rotating angle for the lower lever structure 31.

[0040] Optionally, as shown in Figures 1 to 3 the device further comprises an upper connecting rod 4, the upper connecting rod 4 comprising a first screw buckle 41, a first screw rod 42 and a second screw rod 43, the threaded end of the first screw rod 42 being threadedly connected with one end of the first screw buckle 41, the other end of the first screw rod 42 being fixedly connected with the upper frame 23, the threaded end of the second screw rod 43 being threadedly connected with the other end of the first screw buckle 41, the other end of the second screw rod 43 being fixedly connected with the second support structure 12.

[0041] Specifically, the upper connecting rod 44 is connected through the upper frame 2323 and the second support mechanism, so that the upper frame 2323 can be limited and fixed, and the displacement of the upper frame 2323 is controlled within a reasonable range, thereby ensuring the stability of the upper main transmission joint shaft 88. The first screw buckle 4141 is provided with opposite threaded structures at two ends, and the first screw rod 4242 and the second screw rod 4343 are respectively threadedly connected to the two ends. One end of the first screw rod 4242 is fixedly connected with the upper frame 2323, so as to ensure the stability and reliability of the connection with the upper frame 2323. The first screw rod 4242 and the upper frame 2323 can be connected by welding, high-strength bolt connection or the like, so as to form a relatively rigid whole. The other end of the first screw rod 4242 is provided with a thread, which is accurately matched with the thread at one end of the first screw buckle 4141. Through the screwing of the threads, the adjustable connection between the first screw rod 4242 and the first screw buckle 4141 is realized. The second screw rod 4343 is also provided with a thread at one end, which is threadedly connected with the thread at the other end of the first screw buckle 4141. The other end of the second screw rod 4343 is fixedly connected with the second support structure 1212, and is fixedly connected with the base 11 through the second support structure 1212. Of course, the second screw rod 4343 can also be directly fixedly connected with the base 11. In actual use, by rotating the first screw buckle 4141, the screwing depth of the first screw rod 4242 and the second screw rod 4343 in the first screw buckle 4141 can be changed, so as to accurately fine-tune the distance between the upper frame 2323 and the second support structure 1212, thereby adapting to the position change of the upper frame 2323 under different working conditions.

[0042] Optionally, as shown in Figures 1 to 3 the device further comprises a lower connecting rod 5, the lower connecting rod 5 comprising a second screw buckle 51, a third screw rod 52 and a fourth screw rod 53, the threaded end of the third screw rod 52 being threadedly connected with one end of the second screw buckle 51, the other end of the third screw rod 52 being fixedly connected with the lower frame 33, the threaded end of the fourth screw rod 53 being threadedly connected with the other end of the second screw buckle 51, and the other end of the fourth screw rod 53 being fixedly connected with the second support structure 12.

[0043] Specifically, the lower frame 33 is connected and fixed by the lower connecting rod 5, which is connected to the second support structure 12. The second screw buckle 51 is effectively matched with the third screw rod 52 and the fourth screw rod 53 through the bidirectional thread. One end of the third screw rod 52 is fixedly connected with the lower frame 33 to form an integral force structure, ensuring that the force can be stably transmitted from the lower frame 33 to the third screw rod 52. The other end of the third screw rod 52 has a thread structure matched with the thread of one end of the second screw buckle 51, and the two are connected by thread rotation. Due to the characteristics of the thread, this connection allows the relative position to be adjusted. The fourth screw rod 53 is similar in structure to the third screw rod 52, and the thread at one end is matched with the thread at the other end of the second screw buckle 51 and is connected by rotation, and the other end is fixedly connected with the second support structure 12. The second support structure 12 provides a stable force point for the entire connecting system, which is fixedly connected with the base 1 through the second support mechanism, and can also be directly fixedly connected with the base 1. In actual use, the rotation operation of the second screw buckle 51 can realize accurate regulation of the relative distance between the lower frame 33 and the second support structure 12.

[0044] Optionally, as shown in Figures 1 to 3 The device further comprises an upper stop block assembly 6, which comprises an upper stop block body 61 and an upper stop block base 62. The upper stop block body 61 is arranged on the side of the first lever assembly 211 close to the base 1, and the upper stop block base 62 is arranged on the base 1. The positions of the upper stop block body 61 and the upper stop block base 62 are matched. The upper stop block body 61 is configured to abut against the upper stop block base 62 when the upper hydraulic cylinder 22 is not in action.

[0045] Specifically, the upper stop block assembly 6 mainly comprises an upper stop block and an upper stop block base 621, and supports the upper balancing device 2 when the upper hydraulic cylinder 22 in the upper lever structure 21 is in action. The upper stop block is located on the side of the first lever assembly 211 close to the base 1, and the corresponding upper stop block base 621 is fixedly arranged on the base 1. The positions of the upper stop block and the upper stop block base 621 are matched with each other in space, so that when the upper hydraulic cylinder 22 is not in action, the upper stop block and the upper stop block base 621 abut against each other to support the upper balancing device 2 and bear the gravity of the upper main transmission joint shaft 8 transmitted through the upper balancing device 2, preventing damage to the upper lever structure 21 caused by the gravity of the main transmission joint shaft.

[0046] Optionally, as shown in Figures 1 to 3As shown, the device further comprises a lower stopper assembly 7, which comprises a lower stopper body 71 and a lower stopper base 72, the position of the lower stopper body 71 arranged on the side of the third lever assembly 311 close to the base 1 and the lower stopper base 72 arranged on the base 1 are matched, and the lower stopper body 71 is configured to abut against the lower stopper base 72 when the lower hydraulic cylinder 32 is not in action.

[0047] Specifically, the lower stopper assembly 7 is mainly composed of a lower stopper and a lower stopper base 72, and the supporting effect is started when the lower lever structure 31 falls. The upper stopper is located on the side of the third lever assembly 311 close to the base 1, and the corresponding lower stopper base 72 is fixedly arranged on the base 1, and the two are matched in spatial position, so that when the lower hydraulic cylinder 32 is not in action, the third lever assembly 311 is supported by the abutment of the lower stopper and the lower stopper base 72, and the gravity of the lower main transmission joint shaft 9 transmitted through the lower balancing device 3 is borne, thereby preventing damage to the lower lever structure 31 caused by the gravity of the lower main transmission joint shaft 9.

[0048] Optionally, as shown in the figure, Figures 1 to 3 The upper bearing seat 24 is rotatably connected to the other end of the upper frame 23 through the shaft ears arranged on the two sides.

[0049] Specifically, the upper bearing seat 24 is rotatably connected to the other end of the upper frame 23 through the shaft ears arranged on the two sides, and the connection mode enables the upper bearing seat 24 to rotate flexibly relative to the upper frame 23, so that the posture of the upper bearing seat 24 can be adjusted in time according to the force in different directions during the operation of the rolling mill, the transmission of the force is buffered, the impact force is dispersed, and the stable operation of the rolling mill is ensured.

[0050] Optionally, as shown in the figure, Figures 1 to 3 The lower bearing seat 34 is rotatably connected to the other end of the lower frame 33 through the shaft ears arranged on the two sides.

[0051] Similarly, the lower bearing seat 34 is rotatably connected to the other end of the lower frame 33 through the shaft ears arranged on the two sides, and the connection mode enables the upper bearing seat 24 to rotate flexibly relative to the upper frame 23, so that the posture of the upper bearing seat 24 can be adjusted in time according to the force in different directions during the operation of the rolling mill, the transmission of the force is buffered, the impact force is dispersed, and the stable operation of the rolling mill is ensured.

[0052] The rolling mill provided by the embodiment of the utility model has the same beneficial effects as the rolling mill joint shaft balancing device described above, and details are not repeated here.

[0053] The rolling mill of the embodiment has the same beneficial effects as the rolling mill joint shaft balancing device described above, and details are not repeated here.

[0054] Although the utility model discloses as above, the protection scope of the utility model is not limited to this only.The person skilled in the art can make various changes and modifications without departing from the spirit and scope of the utility model, and these changes and modifications will all fall into the protection scope of the utility model.

Claims

1. A mill arbor balancing device, characterized by, The application relates to a rolling mill balance device, which comprises a base (1), an upper balance device (2) and a lower balance device (3), wherein the upper balance device (2) comprises an upper lever structure (21), an upper hydraulic cylinder (22), an upper frame (23) and an upper bearing seat (24), one end of the upper lever structure (21) is rotationally connected with a movable end of the upper hydraulic cylinder (22) arranged on the base (1), the other end of the upper lever structure (21) is rotationally connected with the base (1), one end of the upper frame (23) is rotationally connected with the middle part of the upper lever structure (21), and the other end of the upper frame (23) is provided with the upper bearing seat (24), the lower balance device (3) comprises a lower lever structure (31), a lower hydraulic cylinder (32), a lower frame (33) and a lower bearing seat (34), one end of the lower lever structure (31) is rotationally connected with a movable end of the lower hydraulic cylinder (32) arranged on the base (1), the other end of the lower lever structure (31) is rotationally connected with the base (1), one end of the lower frame (33) is rotationally connected with the middle part of the lower lever structure (31), and the other end of the lower frame (33) is provided with the lower bearing seat (34), the lower balance device (3) is arranged between the upper bearing seat (24) and the upper lever structure (21), the upper bearing seat (24) is used for penetrating an upper main transmission connecting shaft (8) of a rolling mill, and the lower bearing seat (34) is used for penetrating a lower main transmission connecting shaft (9) of the rolling mill.

2. The mill shaft balancing device according to claim 1, characterized in that The upper lever structure (21) comprises a first lever assembly (211), a second lever assembly (212), a first pin shaft (213), a second pin shaft (214) and a third pin shaft (215), one end of the first lever assembly (211) is rotationally connected with a movable end of the upper hydraulic cylinder (22) through the first pin shaft (213), the other end of the first lever assembly (211) and one end of the second lever assembly (212) are respectively rotationally connected with a first support structure (11) on the base (1) through the second pin shaft (214), and the middle part of the first lever assembly (211) and the other end of the second lever assembly (212) are respectively rotationally connected with one end of the upper frame (23) through the third pin shaft (215).

3. The mill shaft balancing device according to claim 2, characterized in that The lower lever structure (31) comprises a third lever assembly (311), a fourth lever assembly (312), a fourth pin shaft (313), a fifth pin shaft (314) and a sixth pin shaft (315), one end of the third lever assembly (311) is rotatably connected with the movable end of the lower hydraulic cylinder (32) through the fourth pin shaft (313), the other end of the third lever assembly (311) and one end of the fourth lever assembly (312) are rotatably connected with the second support structure (12) provided on the first support structure (11) through the fifth pin shaft (314) respectively, the middle part of the third lever assembly (311) and the other end of the fourth lever assembly (312) are rotatably connected with one end of the lower frame (33) through the sixth pin shaft (315) respectively.

4. The mill shaft balancing device according to claim 3, characterized in that The upper connecting rod (4) comprises a first screw buckle (41), a first screw rod (42) and a second screw rod (43), the threaded end of the first screw rod (42) is threadedly connected with one end of the first screw buckle (41), the other end of the first screw rod (42) is fixedly connected with the upper frame (23), the threaded end of the second screw rod (43) is threadedly connected with the other end of the first screw buckle (41), the other end of the second screw rod (43) is fixedly connected with the second support structure (12).

5. The mill shaft balancing device according to claim 3, characterized in that The lower connecting rod (5) comprises a second screw buckle (51), a third screw rod (52) and a fourth screw rod (53), the threaded end of the third screw rod (52) is threadedly connected with one end of the second screw buckle (51), the other end of the third screw rod (52) is fixedly connected with the lower frame (33), the threaded end of the fourth screw rod (53) is threadedly connected with the other end of the second screw buckle (51), the other end of the fourth screw rod (53) is fixedly connected with the second support structure (12).

6. The mill shaft balancing device according to claim 2, characterized in that The upper stop block assembly (6) comprises an upper stop block body (61) and an upper stop block base (62), the position of the upper stop block body (61) arranged on the side of the first lever assembly (211) close to the base (1) matches the position of the upper stop block base (62) arranged on the base (1), and the upper stop block body (61) is configured to abut against the upper stop block base (62) when the upper hydraulic cylinder (22) is not in action.

7. The mill shaft balancing device according to claim 3, characterized in that The lower stop block assembly (7) comprises a lower stop block body (71) and a lower stop block base (72), the position of the lower stop block body (71) arranged on the side of the third lever assembly (311) close to the base (1) matches the position of the lower stop block base (72) arranged on the base (1), and the lower stop block body (71) is configured to abut against the lower stop block base (72) when the lower hydraulic cylinder (32) is not in action.

8. The mill shaft balancing device according to claim 1, characterized in that The upper bearing seat (24) is rotatably connected with the other end of the upper frame (23) through the shaft ears arranged on both sides.

9. The mill shaft balancing device according to claim 1, characterized in that, The lower bearing seat (34) is rotatably connected with the other end of the lower frame (33) through shaft ears arranged on both sides.

10. A rolling mill, characterized in that A rolling mill arbor balancing device comprising the balancing device according to any one of claims 1-9.

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