Balancing device for main transmission connecting shaft of rolling mill and rolling mill

Abstract

The invention relates to the technical field of rolling mills, and provides a rolling mill main transmission connecting shaft balancing device and a rolling mill. The upper bearing seat is used for mounting an upper connecting shaft, and the lower bearing seat is used for mounting a lower connecting shaft; the cylinder body of the upper vertical hydraulic cylinder is arranged on the base, the piston end is connected with the upper stand column, and the end, away from the base, of the upper stand column is hinged to the upper bearing seat; the cylinder body of the lower vertical hydraulic cylinder is arranged on the base, the piston end is connected with the lower stand column, and the end, away from the base, of the lower stand column is hinged to the lower bearing seat; one end of the upper horizontal hydraulic cylinder is hinged to the end, away from the base, of the upper stand column, the other end of the upper horizontal hydraulic cylinder is hinged to the support, one end of the lower horizontal hydraulic cylinder is hinged to the end, away from the base, of the lower stand column, and the other end of the lower horizontal hydraulic cylinder is hinged to the support. The vertical balance assembly and the horizontal balance assembly are matched with each other to balance force in all directions generated by roll shifting of the main transmission connecting shaft so as to adapt to the roll shifting working condition, and the rolling stability is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of rolling mills, and in particular to a rolling mill main transmission shaft balancing device and a rolling mill. Background Art

[0002] During the operation of the rolling mill, the axial force generated by the weight of the main transmission shaft will cause the rollers and the main motor to bear additional loads. Long-term bearing of additional loads may lead to mechanical failures, or even serious damage to the equipment or accidents. At present, a main transmission shaft balancing device for the rolling mill is usually set, that is, a vertical balancing hydraulic cylinder and a vertical balancing frame are set to balance the axial force generated when the main transmission shaft is running, reduce or eliminate the additional loads borne by the rollers and the main motor, and increase the service life of the rolling mill and the safety of operation.

[0003] However, with the advancement of steel rolling technology, more and more hot-rolled plate and strip mills have adopted the main drive shaft shifting technology. The working roll shifting technology can not only even out the wear of the main drive shaft and increase the service life of the working rolls, but also improve the plate shape of the product, bringing considerable economic benefits to steel companies. For the main drive shaft shifting working condition, since the shaft must extend or shorten with the main drive shaft shifting position, the shaft is no longer a rigid component of fixed length. The existing rolling mill main drive shaft balancing device can only balance the force of the shaft in a single direction, while the main drive shaft shifting will generate multi-directional forces. Therefore, the existing rolling mill main drive shaft balancing device is difficult to adapt to the main drive shaft shifting working condition, which easily causes large vibrations in the mill operation. Summary of the invention

[0004] The problem solved by the invention is how to ensure the rolling stability when the main transmission shaft and rollers are shifted during operation.

[0005] In order to solve the above problems, the present invention provides a rolling mill main transmission shaft balancing device and a rolling mill.

[0006] In a first aspect, the present invention provides a rolling mill main transmission shaft balancing device, comprising an upper bearing seat, a lower bearing seat, a base, a support, an upper column, a lower column, a vertical balancing assembly and a horizontal balancing assembly;

[0007] The base and the support are used to be spaced apart and arranged on the foundation, and the upper column and the lower column are respectively hinged to the base;

[0008] The upper bearing seat is used to install the upper connecting shaft, and the lower bearing seat is used to install the lower connecting shaft;

[0009] The vertical balance assembly comprises an upper vertical hydraulic cylinder and a lower vertical hydraulic cylinder, the cylinder body of the upper vertical hydraulic cylinder is arranged on the base, the piston end of the upper vertical hydraulic cylinder is connected to the upper column, and one end of the upper column away from the base is hinged to the upper bearing seat, the cylinder body of the lower vertical hydraulic cylinder is arranged on the base, the piston end of the lower vertical hydraulic cylinder is connected to the lower column, and one end of the lower column away from the base is hinged to the lower bearing seat;

[0010] The horizontal balancing assembly includes an upper horizontal hydraulic cylinder and a lower horizontal hydraulic cylinder, one end of the upper horizontal hydraulic cylinder is hinged to an end of the upper column away from the base, the other end of the upper horizontal hydraulic cylinder is hinged to the support, one end of the lower horizontal hydraulic cylinder is hinged to an end of the lower column away from the base, and the other end of the lower horizontal hydraulic cylinder is hinged to the support.

[0011] Optionally, an upper positioning portion and a lower positioning portion are provided on the base, and the vertical balancing assembly further includes an upper connecting rod and a lower connecting rod, one end of the upper connecting rod is hinged to the upper positioning portion, and the other end is hinged to the end of the upper column close to the base, one end of the lower connecting rod is hinged to the lower positioning portion, and the other end is hinged to the end of the lower column close to the base.

[0012] Optionally, the rolling mill main transmission shaft balancing device also includes a locking hydraulic cylinder and a limit block, the limit block is connected to the piston end of the locking hydraulic cylinder, the locking hydraulic cylinder is arranged on the base, and the locking hydraulic cylinder is used to drive the limit block to move to the bottom of the upper column or the lower column and resist against it.

[0013] Optionally, a slide rail is provided on the base, and the limit block is slidably connected to the slide rail.

[0014] Optionally, the two upper columns are symmetrically arranged on the base, and the two upper vertical hydraulic cylinders are arranged on the base at intervals along the direction of the line connecting the two upper columns and symmetrically along the symmetry center line of the upper columns, and the piston ends of the two upper vertical hydraulic cylinders are respectively connected to the upper columns.

[0015] Optionally, the two lower columns are symmetrically arranged on the base, the lower bearing seat is connected between the ends of the two lower columns away from the base, the two lower vertical hydraulic cylinders are arranged on the base at intervals along the connecting direction of the two lower columns, and are symmetrical along the symmetry center line of the lower columns, and the piston ends of the two lower vertical hydraulic cylinders are respectively connected to the two lower columns.

[0016] Optionally, the vertical balancing assembly further comprises an upper hinged plate, wherein the upper hinged plate is arranged on the upper column, and the upper vertical hydraulic cylinder is hinged to the upper hinged plate.

[0017] Optionally, the vertical balancing assembly further comprises a lower hinged plate, wherein the lower hinged plate is arranged on the lower column, and the lower vertical hydraulic cylinder is hinged to the lower hinged plate.

[0018] Optionally, the rolling mill main transmission shaft balancing device also includes an escalator, and the escalator is arranged on the support.

[0019] In a second aspect, the present invention provides a rolling mill, comprising the rolling mill main transmission shaft balancing device as described above.

[0020] The beneficial effect of the rolling mill main transmission shaft balancing device of the present invention is: the rolling mill main transmission shaft balancing device is fixedly arranged on the foundation through the base and the support, so as to ensure the operation stability of the rolling mill main transmission shaft balancing device. The upper shaft is installed on the upper bearing seat, and the lower shaft is installed on the lower bearing seat. When in use, the upper vertical hydraulic cylinder is used to lift or bring back the upper column to apply a force perpendicular to the foundation direction to the upper bearing seat, so as to buffer and balance the force perpendicular to the foundation direction generated by the upper shaft roller, and the lower vertical hydraulic cylinder is the same. Any telescopic end of the upper horizontal hydraulic cylinder extends or contracts to generate a force parallel to the foundation direction, so as to buffer and parallel the force parallel to the foundation direction generated by the upper shaft roller, and the lower horizontal hydraulic cylinder is the same. The vertical balancing assembly and the horizontal balancing assembly cooperate with each other to balance the forces in various directions generated by the main transmission shaft roller, so as to adapt to the working condition of the main transmission shaft roller and ensure the stability of rolling. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic structural diagram of a rolling mill main transmission shaft balancing device according to an embodiment of the present invention.

[0022] Description of reference numerals:

[0023] 1-upper bearing seat; 2-lower bearing seat;

[0024] 3-base; 31-upper positioning part; 32-lower positioning part

[0025] 4-support; 5-upper column; 6-lower column;

[0026] 7-vertical balance assembly; 71-upper vertical hydraulic cylinder; 72-lower vertical hydraulic cylinder; 73-upper hinge plate; 74 lower hinge plate;

[0027] 8- horizontal balance assembly; 81- upper horizontal hydraulic cylinder; 82- lower horizontal hydraulic cylinder

[0028] 9-escalator; 100-upper connecting shaft; 200-lower connecting shaft. DETAILED DESCRIPTION

[0029] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. Although certain embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be interpreted as being limited to the embodiments described herein. On the contrary, these embodiments are provided to provide a more thorough and complete understanding of the present invention. It should be understood that the drawings and embodiments of the present invention are only for exemplary purposes and are not intended to limit the scope of protection of the present invention.

[0030] The Z axis in the drawings represents the vertical direction, that is, the up and down position, and the positive direction of the Z axis represents the top, and the reverse direction of the Z axis represents the bottom; the X axis in the drawings represents the horizontal direction, and is designated as the front and back position, and the positive direction of the X axis represents the front side, and the reverse direction of the X axis represents the back side; the Y axis in the drawings represents the left and right position, and the positive direction of the Y axis represents the left side, and the reverse direction of the Y axis represents the right side. It should also be noted that the aforementioned Z axis, Y axis, and X axis are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0031] The term "including" and its variations used in this document are open inclusions, that is, "including but not limited to"; the term "based on" means "based at least in part on"; the term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one other embodiment"; the term "some embodiments" means "at least some embodiments"; the term "optionally" means "optional embodiments". The relevant definitions of other terms will be given in the following description. It should be noted that the concepts of "first", "second", etc. mentioned in the present invention are only used to distinguish different devices, modules or units, and are not used to limit the order or interdependence of the functions performed by these devices, modules or units.

[0032] It should be noted that the modifications of "one" and "plurality" mentioned in the present invention are illustrative rather than restrictive, and those skilled in the art should understand that, unless otherwise clearly indicated in the context, it should be understood as "one or more".

[0033] like Figure 1 As shown, a rolling mill main transmission shaft balancing device provided by an embodiment of the present invention is characterized in that it includes an upper bearing seat 1, a lower bearing seat 2, a base 3, a support 4, an upper column 5, a lower column 6, a vertical balancing assembly 7 and a horizontal balancing assembly 8.

[0034] The base 3 and the support 4 are used to be spaced apart on a foundation such as a rolling mill frame, the ground, etc., and the upper column 5 and the lower column 6 are hinged to the base 3 respectively.

[0035] The upper bearing seat 1 is used for installing the upper connecting shaft 100 , and the lower bearing seat 2 is used for installing the lower connecting shaft 200 .

[0036] The vertical balancing assembly 7 includes an upper vertical hydraulic cylinder 71 and a lower vertical hydraulic cylinder 72. The cylinder body of the upper vertical hydraulic cylinder 71 is arranged on the base 3, the piston end of the upper vertical hydraulic cylinder 71 is connected to the upper column 5, and the end of the upper column 5 away from the base 3 is hinged to the upper bearing seat 1, the cylinder body of the lower vertical hydraulic cylinder 72 is arranged on the base 3, the piston end of the lower vertical hydraulic cylinder 72 is connected to the lower column 6, and the end of the lower column 6 away from the base 3 is hinged to the lower bearing seat 2.

[0037] Specifically, the upper column 5 is a plate-like structure, and the middle part has an arc-shaped bend at a certain angle, so that the upper part of the upper column 5 is offset toward the positive direction of the X-axis. The cylinder body of the upper vertical hydraulic cylinder 71 is fixedly arranged on the base 3, and the piston end of the upper vertical hydraulic cylinder 71 is hinged to the middle part of the upper column 5. When in use, the upper connecting shaft 100 roller generates a force perpendicular to the base direction, and the piston end of the upper vertical hydraulic cylinder 71 is extended and retracted to lift or bring back the upper column 5, and a force perpendicular to the base direction and in the same direction as the force generated by the upper connecting shaft 100 roller perpendicular to the base direction is applied to the hinged upper bearing seat 1, so as to buffer and balance the force generated by the upper connecting shaft 100 roller perpendicular to the base direction. The lower column 6 is a plate-like structure, and the middle part has an arc-shaped bend at a certain angle so that the upper part of the lower column 6 is offset toward the positive direction of the X-axis. The cylinder body of the lower vertical hydraulic cylinder 72 is fixedly arranged on the base 3, and the piston end of the lower vertical hydraulic cylinder 72 is hinged to the middle part of the lower column 6. When in use, the lower connecting shaft 200 roller generates a force perpendicular to the base direction, and the piston end of the lower vertical hydraulic cylinder 72 is extended and retracted to lift or bring back the lower column 6, and a force perpendicular to the base direction and in the same direction as the force generated by the lower connecting shaft 200 roller perpendicular to the base direction is applied to the hinged lower bearing seat 2, so as to buffer and balance the force generated by the lower connecting shaft 200 roller perpendicular to the base direction. It should be noted that, since the height of the upper connecting shaft 100 is higher than that of the lower connecting shaft 200, the length of the upper column 5 is greater than that of the lower column 6, and in order to avoid collision or friction between the upper column 5 and the lower column 6 to cause damage to the device, the upper vertical hydraulic cylinder 71 is arranged close to the edge of the base 3, and the lower vertical hydraulic cylinder 72 is arranged close to the center of the base 3. The foundation can be the ground or the rolling mill frame.

[0038] The horizontal balancing assembly 8 includes an upper horizontal hydraulic cylinder 81 and a lower horizontal hydraulic cylinder 82, one end of the upper horizontal hydraulic cylinder 81 is hinged to the end of the upper column 5 away from the base 3, the other end of the upper horizontal hydraulic cylinder 81 is hinged to the support 4, one end of the lower horizontal hydraulic cylinder 82 is hinged to the end of the lower column 6 away from the base 3, and the other end of the lower horizontal hydraulic cylinder 82 is hinged to the support 4.

[0039] Specifically, the upper horizontal hydraulic cylinder 81 is a double-rod hydraulic cylinder with piston rods at both ends. One end is hinged to the end of the upper column 5 away from the base 3, and the other end is hinged to the support 4. The upper horizontal hydraulic cylinder 81 forms a certain angle with the upper vertical hydraulic cylinder 71, for example, about 90 degrees. When in use, the upper connecting shaft 100 generates a force parallel to the base direction, and at least one piston end of the upper horizontal hydraulic cylinder 81 is extended and retracted to buffer and balance the force generated by the upper connecting shaft 100 in the direction parallel to the base. For example, when the upper connecting shaft 100 generates a force in the negative direction of the X-axis, at least one piston end of the upper horizontal hydraulic cylinder 81 extends the running distance of the roller (the running distance of the roller can be obtained according to the displacement sensor) to balance the force generated by the upper connecting shaft 100 in the negative direction of the X-axis. The lower horizontal hydraulic cylinder 82 is a double-rod hydraulic cylinder, both ends of which are piston rods, one end of which is hinged to the end of the lower column 6 away from the base 3, and the other end of which is hinged to the support 4. The lower horizontal hydraulic cylinder 82 forms a certain angle with the lower vertical hydraulic cylinder 72. The method of use is the same as that of the upper horizontal hydraulic cylinder 81, and will not be repeated here.

[0040] The operation method of the rolling mill main transmission shaft balancing device in this embodiment is described with reference to some working conditions:

[0041] When the rolling mill is running, the upper connecting shaft 100 generates a force perpendicular to the basic direction and upward (positive direction of the Z axis) and a force parallel to the basic direction and forward (positive direction of the X axis) by the roller shifting, the piston end of the upper vertical hydraulic cylinder 71 extends to lift the upper column 5 to generate a force perpendicular to the basic direction and upward (positive direction of the Z axis) on the upper bearing seat 1, and any telescopic end of the upper horizontal hydraulic cylinder 81 extends to generate a force parallel to the basic direction and forward (positive direction of the X axis) on the upper bearing seat 1; the lower connecting shaft 200 generates a force perpendicular to the basic direction and downward (negative direction of the Z axis) and a force parallel to the basic direction and backward (negative direction of the X axis), the piston end of the lower vertical hydraulic cylinder 72 contracts to bring the lower column 6 back to generate a force perpendicular to the basic direction and downward (negative direction of the Z axis) on the lower bearing seat 2, and any telescopic end of the lower horizontal hydraulic cylinder 82 contracts to generate a force parallel to the basic direction and backward (negative direction of the X axis) on the upper bearing seat 1.

[0042] In this embodiment, the main transmission shaft balancing device of the rolling mill is fixedly arranged on the foundation through the base 3 and the support 4 to ensure the operation stability of the main transmission shaft balancing device of the rolling mill. The upper bearing seat 1 is installed with the upper shaft 100, and the lower bearing seat 2 is installed with the lower shaft 200. When in use, the upper vertical hydraulic cylinder 71 is used to lift or bring back the upper column 5 to apply a force perpendicular to the foundation direction to the upper bearing seat 1, so as to buffer and balance the force perpendicular to the foundation direction generated by the upper shaft 100 roller shifting, and the lower vertical hydraulic cylinder 71 is the same. Any telescopic end of the upper horizontal hydraulic cylinder 81 extends or contracts to generate a force parallel to the foundation direction, so as to buffer and parallel the force parallel to the foundation direction generated by the upper shaft 100 roller shifting, and the lower horizontal hydraulic cylinder 82 is the same. The vertical balancing assembly 7 and the horizontal balancing assembly 2 cooperate with each other to balance the forces in various directions generated by the main transmission shaft roller shifting, so as to adapt to the main transmission shaft roller shifting working condition and ensure the stability of rolling.

[0043] Optionally, an upper positioning portion 31 and a lower positioning portion 32 are provided on the base 3, and the vertical balancing assembly 7 also includes an upper connecting rod and a lower connecting rod, one end of the upper connecting rod is hinged on the upper positioning portion 31, and the other end is hinged to the end of the upper column 5 close to the base 3, one end of the lower connecting rod is hinged on the lower positioning portion 32, and the other end is hinged to the end of the lower column 6 close to the base 3.

[0044] Specifically, in order to prevent the upper column 5 from deflecting when it is lifted up or brought back by the upper vertical hydraulic cylinder 71, an upper connecting rod is provided, and its two ends are respectively hinged to the upper positioning portion 31 provided on the base 3 and the end of the upper column 5 close to the base 3, so as to limit the operation of the upper column 5. The lower connecting rod is similar to the upper connecting rod, and will not be described in detail here. It should be noted that the height of the upper positioning portion 31 and the lower positioning portion 32 can also be adjusted according to the height of the upper bearing seat 1 and the lower bearing seat 2.

[0045] Optionally, the rolling mill main transmission shaft balancing device also includes a locking hydraulic cylinder and a limit block, the limit block is connected to the piston end of the locking hydraulic cylinder, the locking hydraulic cylinder is arranged on the base 3, and the locking hydraulic cylinder is used to drive the limit block to move to the bottom of the upper column 5 or the lower column 6 and resist against it.

[0046] Specifically, when the upper connecting shaft 1 needs to be repaired or installed, first the upper vertical hydraulic cylinder 71 extends to lift the upper column 5, then the telescopic end of the locking hydraulic cylinder extends to place the limit block at the bottom of the upper column 5, and finally the upper vertical hydraulic cylinder 71 contracts to bring the upper column 5 back, and the end of the upper column 5 close to the base 3 abuts against the limit block, and the upper column 5 is locked to ensure that the upper column 5 always remains stable when the upper connecting shaft 1 is repaired or installed, thereby improving the safety of the repair and installation of the upper connecting shaft 1. When the lower connecting shaft 2 is repaired and installed, the operation of the lower column 6 and the limit block is similar, and will not be repeated here.

[0047] Optionally, a slide rail is provided on the base 3, and the limit block is slidably connected to the slide rail to increase the smoothness of the sliding of the limit block.

[0048] Optionally, the two upper columns 5 are symmetrically arranged on the base 3, and the two upper vertical hydraulic cylinders 71 are arranged on the base 3 at intervals along the connecting line direction of the two upper columns 5, and are symmetrical along the symmetry center line of the upper columns 5, and the piston ends of the two upper vertical hydraulic cylinders 71 are respectively connected to the upper columns 5.

[0049] Optionally, the two lower columns 6 are symmetrically arranged on the base 3, the lower bearing seat 2 is connected between the ends of the two lower columns 6 away from the base 3, the two lower vertical hydraulic cylinders 72 are arranged on the base 3 at intervals along the connecting line direction of the two lower columns 6, and are symmetrical along the symmetry center line of the lower columns 6, and the piston ends of the two lower vertical hydraulic cylinders 72 are respectively connected to the two lower columns 6.

[0050] Specifically, the existing rolling mill main transmission shaft balancing device is a single balancing hydraulic cylinder centrally arranged structure, which is prone to eccentric loading, action blocking and damage of the balancing hydraulic cylinder due to errors in processing and manufacturing and on-site installation. Therefore, in this embodiment, two upper columns 5, lower columns 6, upper vertical hydraulic cylinders 71 and lower vertical hydraulic cylinders 72 are correspondingly arranged on the base 3, and correspondingly, two upper horizontal hydraulic cylinders 81 and lower horizontal hydraulic cylinders 82 are also correspondingly arranged, so that the balancing hydraulic cylinder is more evenly stressed, effectively solving the problem of eccentric loading of a single balancing hydraulic cylinder.

[0051] Optionally, the vertical balancing assembly 7 further includes an upper hinged plate 73 , wherein the upper hinged plate 73 is disposed on the upper column 5 , and the upper vertical hydraulic cylinder 71 is connected to the upper hinged plate 73 .

[0052] Optionally, the vertical balancing assembly 7 further includes a lower hinged plate 74 , wherein the lower hinged plate 74 is disposed on the lower column 6 , and the lower vertical hydraulic cylinder 72 is connected to the lower hinged plate 74 .

[0053] Specifically, an upper hinge plate 73 is provided, and there may be four upper hinge plates 73, and each two are symmetrically provided at the middle of one of the upper columns 5. The piston end of the upper vertical hydraulic cylinder 71 is provided between the two upper hinge plates 73, and is connected by a pin shaft to prevent the upper vertical hydraulic cylinder 71 from getting stuck when lifting or bringing back the upper column 5. The structure and connection method of the lower hinge plate 74 are the same as those of the upper hinge plate 73, and are not described in detail here.

[0054] Optionally, the rolling mill main transmission shaft balancing device further includes an escalator 9 , and the escalator 9 is arranged on the support 4 .

[0055] A rolling mill provided by an embodiment of the present invention comprises the rolling mill main transmission shaft balancing device as described above.

[0056] The beneficial effects of the rolling mill of this embodiment relative to the prior art are the same as those of the above-mentioned rolling mill main transmission shaft balancing device, which will not be described in detail here.

[0057] Although the present invention is disclosed as above, the protection scope of the present invention is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention, and these changes and modifications will fall within the protection scope of the present invention.

Claims

1. A rolling mill main transmission shaft balancing device, characterized in that: It comprises an upper bearing seat (1), a lower bearing seat (2), a base (3), a support (4), an upper column (5), a lower column (6), a vertical balance component (7) and a horizontal balance component (8); The base (3) and the support (4) are used to be arranged at intervals on the foundation, and the upper column (5) and the lower column (6) are respectively hinged on the base (3); The upper bearing seat (1) is used to install the upper connecting shaft (100), and the lower bearing seat (2) is used to install the lower connecting shaft (200); The vertical balancing assembly (7) comprises an upper vertical hydraulic cylinder (71) and a lower vertical hydraulic cylinder (72); the cylinder body of the upper vertical hydraulic cylinder (71) is arranged on the base (3); the piston end of the upper vertical hydraulic cylinder (71) is connected to the upper column (5); the end of the upper column (5) away from the base (3) is hinged to the upper bearing seat (1); the cylinder body of the lower vertical hydraulic cylinder (72) is arranged on the base (3); the piston end of the lower vertical hydraulic cylinder (72) is connected to the lower column (6); the end of the lower column (6) away from the base (3) is hinged to the lower bearing seat (2); The horizontal balancing assembly (8) comprises an upper horizontal hydraulic cylinder (81) and a lower horizontal hydraulic cylinder (82), one end of the upper horizontal hydraulic cylinder (81) is hinged to one end of the upper column (5) away from the base (3), the other end of the upper horizontal hydraulic cylinder (81) is hinged to the support (4), one end of the lower horizontal hydraulic cylinder (82) is hinged to one end of the lower column (6) away from the base (3), and the other end of the lower horizontal hydraulic cylinder (82) is hinged to the support (4).

2. The rolling mill main transmission shaft balancing device according to claim 1, characterized in that: The base (3) is provided with an upper positioning portion (31) and a lower positioning portion (32), and the vertical balancing assembly (7) also includes an upper connecting rod and a lower connecting rod, one end of the upper connecting rod is hinged on the upper positioning portion (31), and the other end is hinged to the end of the upper column (5) close to the base (3), and one end of the lower connecting rod is hinged on the lower positioning portion (32), and the other end is hinged to the end of the lower column (6) close to the base (3).

3. The rolling mill main transmission shaft balancing device according to claim 1, characterized in that: It also includes a locking hydraulic cylinder and a limit block, wherein the limit block is connected to the piston end of the locking hydraulic cylinder, and the locking hydraulic cylinder is arranged on the base (3). The locking hydraulic cylinder is used to drive the limit block to move to the bottom of the upper column (5) or the lower column (6) and to abut against it.

4. The rolling mill main transmission shaft balancing device according to claim 3, characterized in that: The base (3) is provided with a slide rail, and the limit block is slidably connected to the slide rail.

5. The rolling mill main transmission shaft balancing device according to claim 1, characterized in that: The two upper columns (5) are symmetrically arranged on the base (3), and the two upper vertical hydraulic cylinders (71) are arranged on the base (3) at intervals along the direction of the connection line of the two upper columns (5) and symmetrically along the symmetry center line of the upper columns (5), and the piston ends of the two upper vertical hydraulic cylinders (71) are respectively connected to the upper columns (5).

6. The rolling mill main transmission shaft balancing device according to claim 1, characterized in that: The two lower columns (6) are symmetrically arranged on the base (3), the lower bearing seat (2) is connected between the ends of the two lower columns (6) away from the base (3), the two lower vertical hydraulic cylinders (72) are arranged on the base (3) at intervals along the connecting line direction of the two lower columns (6), and are symmetrical along the symmetry center line of the lower columns (6), and the piston ends of the two lower vertical hydraulic cylinders (72) are respectively connected to the two lower columns (6).

7. The rolling mill main transmission shaft balancing device according to claim 1, characterized in that: The vertical balancing assembly (7) further comprises an upper hinged plate (73), wherein the upper hinged plate (73) is arranged on the upper column (5), and the upper vertical hydraulic cylinder (71) is hingedly connected to the upper hinged plate (73).

8. The rolling mill main transmission shaft balancing device according to claim 1, characterized in that: The vertical balancing assembly (7) further comprises a lower hinged plate (74), wherein the lower hinged plate (74) is arranged on the lower column (6), and the lower vertical hydraulic cylinder (72) is hingedly connected to the lower hinged plate (74).

9. The rolling mill main transmission shaft balancing device according to claim 1, characterized in that: It also comprises an escalator (9), wherein the escalator (9) is arranged on the support (4).

10. A rolling mill, characterized in that: It comprises a rolling mill main transmission shaft balancing device as described in any one of claims 1 to 9.

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