Upper supporting roll balancing device of finishing machine

Abstract

The utility model provides an upper supporting roll balancing device of a finishing machine. The upper supporting roll balancing device comprises a rack, the driving mechanism is used for simultaneously outputting two groups of horizontal forces in opposite directions; the force conversion mechanism is used for correspondingly converting each group of horizontal force into a group of force in the vertical direction at the same time; each group of vertical force has the same direction; the first end of the pull rod mechanism is connected with the force conversion mechanism, and the second end of the pull rod mechanism is matched with the T-shaped groove in the top of the upper supporting roller bearing seat. Therefore, the acting force in the horizontal direction and the acting force in the vertical direction are synchronously converted through a single driving source, the problem of poor synchronism caused by independent work of multiple traditional hydraulic cylinders is solved, the inclination risk in the lifting process of the upper supporting roller is prevented, and potential safety hazards of equipment are eliminated; meanwhile, complex detection elements such as a displacement sensor are omitted, the system structure is simplified, the equipment cost and the failure rate are reduced, and stable lifting of the upper supporting roller under the two working conditions of pushing-in and pushing-out is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of upper support roller replacement of a skin-pass machine, in particular to an upper support roller balancing device of a skin-pass machine. Background Art

[0002] On the hot-dip galvanizing production line, the skin-pass mill plays an important role. When the upper support roller is replaced, a balancing device is usually required to achieve the lifting and lowering of the upper support roller. However, the traditional upper support roller balancing device usually has four hydraulic cylinders connected to four connecting rods to lift the upper support roller. Since the four hydraulic cylinders work independently, this structure is difficult to achieve synchronous lifting and lowering of the four hydraulic cylinders. The upper support roller is prone to tilting during the roller replacement process, posing a safety hazard. Patent CN 222573846 U discloses a skin-pass mill support roller balancing device, which uses two hydraulic cylinders to achieve the lifting function. Although this structure can better improve the synchronization function compared to the balancing device with four hydraulic cylinders, the two hydraulic cylinders are still out of sync. In addition, in order to achieve the synchronization function, the above two structures must be equipped with displacement sensors to ensure the synchronization of the hydraulic cylinders, which is costly and increases the failure rate.

[0003] Therefore, it is necessary to provide a device to overcome the above problems. Utility Model Content

[0004] The main purpose of the utility model is to provide a balancing device for a support roller on a skin-finishing machine, so as to at least solve the problems in the prior art of asynchronism between two hydraulic cylinders and the high cost of equipping a displacement sensor.

[0005] In order to achieve the above-mentioned purpose, the utility model provides a balancing device for the upper support roller of a finishing machine, comprising: a frame; a driving mechanism, the driving mechanism being arranged on the frame, the driving mechanism being used to simultaneously output two groups of horizontal forces in opposite directions; a force conversion mechanism, the force conversion mechanism being symmetrically connected to the output end of the driving mechanism, the force conversion mechanism being used to simultaneously convert each group of the horizontal forces into a corresponding group of vertical forces; the directions of each group of the vertical forces are the same; a pull rod mechanism, the first end of the pull rod mechanism being connected to the force conversion mechanism, the second end of the pull rod mechanism being matched with the T-slot on the top of the upper support roller bearing seat; wherein, when the driving mechanism outputs two groups of horizontal forces that are mutually away from the center direction of the finishing machine, the force conversion mechanism converts the two groups of horizontal forces into two groups of vertical upward forces and drives the pull rod mechanism to move vertically upward, so as to vertically pull up the upper support roller bearing seat.

[0006] Optionally, the rack includes: an inspection platform; two groups of support frames, the two groups of support frames are arranged at the bottom of the inspection platform, and are used to support the inspection platform; and a crossbeam, the two ends of the crossbeam are respectively connected to the two groups of support frames.

[0007] Optionally, the driving mechanism includes: a double-piston-rod hydraulic cylinder, the cylinder body of the double-piston-rod hydraulic cylinder is horizontally fixed in the middle of the crossbeam, and two piston rods symmetrically arranged in the cylinder body extend horizontally to both ends of the cylinder body respectively.

[0008] Optionally, the force conversion mechanism includes: two groups of lower wedge blocks, each group of the lower wedge blocks is connected to one of the piston rods; two groups of guide rails, the two groups of guide rails are symmetrically arranged on both sides of the driving mechanism and fixed on the maintenance platform; the length direction of the guide rails is the same as the direction of the horizontal force output by the driving mechanism; two groups of upper wedge blocks, each group of upper wedge blocks is slidably fitted with each group of lower wedge blocks through an inclined surface; wherein, the two groups of lower wedge blocks move horizontally along the two groups of guide rails, and when the area of ​​the fitting area between the lower wedge block and the upper wedge block gradually increases, the corresponding upper wedge block is gradually pushed up under the action of the inclined surface; when the area of ​​the fitting area between the lower wedge block and the upper wedge block gradually decreases, the corresponding upper wedge block gradually falls back.

[0009] Optionally, the inclination angle of the inclined surface of the lower wedge block is 15 to 30 degrees.

[0010] Optionally, the guide rail is L-shaped, and a wear-resistant plate is installed on the surface where the guide rail cooperates with the lower wedge block, and the material of the wear-resistant plate is 42CrMo.

[0011] Optionally, each of the upper wedge blocks is provided with hanging ears on both sides perpendicular to the guide rail, and the pulling rod mechanism includes: a plurality of connecting rods, each of the connecting rods vertically passes through the maintenance platform, and the first end of each connecting rod is fixedly connected to one of the hanging ears; a plurality of T-shaped heads, the first end of each T-shaped head is threadedly connected to the second end of a connecting rod, and the shape of the second end of the T-shaped head matches the T-slot on the top of the upper support roller bearing seat; a guiding mechanism, which is used to constrain the circumferential rotation of the connecting rod and provide vertical guidance for the connecting rod.

[0012] Optionally, a plurality of oil grooves are provided on the inclined surfaces of the lower wedge block and the upper wedge block, and the oil grooves are used to store lubricating grease and bring the grease to the mating area through the relative movement of the inclined surfaces. The force conversion mechanism also includes: a tray, which is provided below the lower wedge block and is used to collect lubricating grease overflowing from the inclined surface.

[0013] Optionally, the plurality of oil grooves are equidistantly distributed longitudinally along the inclined surface of the upper wedge block, and have a depth of 1 to 2 mm.

[0014] Optionally, the guide mechanism includes: an anti-rotation pin, which passes through the lug and is vertically embedded in the first end of the connecting rod, and the anti-rotation pin is used to limit the circumferential rotation of the connecting rod; a first linear bearing, which is fixed on the maintenance platform, and the first linear bearing is sleeved on the connecting rod and slides with the connecting rod; a second linear bearing, which is fixed on the support frame, and the second linear bearing is sleeved on the connecting rod and slides with the connecting rod; wherein, the first linear bearing is located at the first end of the connecting rod, and the second linear bearing is located in the middle of the connecting rod.

[0015] The utility model provides a balancing device for the upper support roller of a finishing machine, comprising: a frame; a driving mechanism, the driving mechanism being arranged on the frame, the driving mechanism being used to simultaneously output two groups of horizontal forces in opposite directions; a force conversion mechanism, the force conversion mechanism being symmetrically connected to the output end of the driving mechanism, the force conversion mechanism being used to simultaneously convert each group of the horizontal forces into a corresponding group of vertical forces; the directions of each group of the vertical forces are the same; a pull rod mechanism, the first end of the pull rod mechanism being connected to the force conversion mechanism, the second end of the pull rod mechanism being matched with the T-slot on the top of the upper support roller bearing seat; wherein, when the driving mechanism outputs two groups of horizontal forces moving away from each other, the force conversion mechanism converts the two groups of horizontal forces moving away from each other in the direction of the center of the finishing machine into two groups of vertical upward forces and drives the pull rod mechanism to move vertically upward, so as to vertically pull up the upper support roller bearing seat. In this way, the horizontal and vertical forces are synchronously converted through a single driving source, avoiding the poor synchronization problem caused by the independent operation of traditional multiple hydraulic cylinders, preventing the risk of tilting during the lifting of the upper support roller, and eliminating safety hazards of the equipment. At the same time, complex detection components such as displacement sensors are omitted, the system structure is simplified, the equipment cost and failure rate are reduced, and the upper support roller can be smoothly lifted and lowered under both pushing and pushing conditions, meeting the stringent requirements of the hot-dip galvanizing unit for continuous production on roller changing efficiency and stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting part of this application are provided to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are provided to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0017] Figure 1 This is a schematic diagram of the overall structure of a support roller balancing device on a skin-pass machine that can be selected according to an embodiment of the present utility model;

[0018] Figure 2 This is a schematic diagram of the working state of the upper support roller when it is in the lowest position according to an embodiment of the utility model;

[0019] Figure 3This is a schematic diagram of the working state of the upper support roller when it is in the highest position according to an embodiment of the utility model;

[0020] Figure 4 This is a schematic diagram of the connection between the connecting rod and the upper wedge block according to an optional embodiment of the utility model;

[0021] Figure 5 It is a schematic diagram of an optional support frame according to an embodiment of the present utility model.

[0022] Reference numerals:

[0023] 10. Frame; 11. Maintenance platform; 12. Support frame; 121. Column; 122. Connecting section; 13. Crossbeam; 20. Driving mechanism; 21. Double-piston-rod hydraulic cylinder; 211. Cylinder body; 212. Piston rod; 30. Force conversion mechanism; 31. Lower wedge; 32. Guide rail; 33. Upper wedge; 34. Lug; 35. Pallet; 36. Wear-resistant plate; 37. Roller; 40. Pull rod mechanism; 41. Connecting rod; 42. T-head; 43. Guide mechanism; 431. Anti-rotation pin; 432. First linear bearing; 433. Second linear bearing; 50. Upper support roller bearing seat. DETAILED DESCRIPTION

[0024] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0025] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5 As shown, a balancing device for the upper support roller of a finishing machine includes: a frame 10; a driving mechanism 20, which is arranged on the frame 10, and is used to simultaneously output two groups of horizontal forces in opposite directions; a force conversion mechanism 30, which is symmetrically connected to the output end of the driving mechanism 20, and is used to simultaneously convert each group of horizontal forces into a corresponding group of vertical forces; each group of vertical forces has the same direction; a pull rod mechanism 40, the first end of the pull rod mechanism 40 is connected to the force conversion mechanism 30, and the second end of the pull rod mechanism 40 matches the T-slot on the top of the upper support roller bearing seat; wherein, when the driving mechanism 20 outputs two groups of horizontal forces moving away from each other, the force conversion mechanism 30 converts the two groups of horizontal forces moving away from each other into two groups of vertical upward mechanical forces and drives the pull rod mechanism 40 to move vertically upward, so as to vertically pull up the upper support roller bearing seat.

[0026] Specifically, the frame 10 is the supporting frame of the entire finishing machine balancing device, providing a fixing and installation foundation for other components to ensure the overall stability of the device. The driving mechanism 20 is installed on the frame 10, and is used to simultaneously output two sets of horizontal forces in opposite directions, that is, two working conditions including two sets of horizontal forces moving away from each other or approaching each other, providing a power source for subsequent force conversion. The force conversion mechanism 30 is symmetrically connected to the output end of the driving mechanism 20, converting the horizontal force output by the driving mechanism 20 into a vertical force, ensuring that the two sets of vertical forces after conversion are in the same direction. The first end of the pull rod mechanism 40 is connected to the force conversion mechanism 30, and the second end matches the T-slot on the top of the upper support roller bearing seat 50, which is responsible for transmitting the vertical force to the upper support roller bearing seat 50, driving its vertical movement. When the drive mechanism 20 outputs two sets of horizontal forces that move toward each other to the limit position, the force conversion mechanism 30 converts the horizontal forces into two sets of vertical downward mechanical forces, driving the pull rod mechanism 40 to drive the upper support roller on the upper support roller bearing seat 50 to descend to the lowest working position, allowing the upper support roller to land smoothly on the C-shaped frame and then be pushed out of the frame under the action of the roll changing device. When the upper support roller bearing seat 50 with the new upper support roller is pulled into the frame 10, the second end of the pull rod mechanism 40 just enters the T-slot at the top of the upper support roller bearing seat 50. Then, the drive mechanism 20 outputs two sets of horizontal forces that move away from each other, and the force conversion mechanism 30 converts the horizontal forces into two sets of vertical downward forces, driving the pull rod mechanism 40 to drive the upper support roller bearing seat 50 and the upper support roller thereon to rise until the bearing seat of the upper support roller reaches the preset height position of the rolling line adjustment device, completing the roll changing process of the upper support roller.

[0027] The device in the present application synchronously converts the horizontal and vertical forces through a single driving source, avoiding the poor synchronization problem caused by the independent operation of traditional multiple hydraulic cylinders, fundamentally preventing the risk of tilting during the lifting and lowering of the upper support roller, and eliminating the safety hazards of the equipment; at the same time, it eliminates complex detection components such as displacement sensors, simplifies the system structure, reduces equipment costs and failure rates, and realizes the smooth lifting and lowering of the upper support roller under both pushing and pushing conditions, meeting the stringent requirements of the hot-dip galvanizing unit for roller changing efficiency and stability in continuous production.

[0028] In one possible embodiment, the rack 10 includes: an inspection platform 11; two groups of support frames 12, which are arranged at the bottom of the inspection platform to support the inspection platform 11; and a crossbeam 13, with both ends of the crossbeam 13 respectively connected to the two groups of support frames 12.

[0029] Specifically, the frame 10 consists of an inspection platform 11, two sets of support frames 12, and a crossbeam 13. The two sets of support frames 12 serve as the load-bearing components and are symmetrically distributed at the bottom of the inspection platform 11, distributing and supporting the overall weight. The crossbeam 13 is connected to the support frames 12 at both ends, forming a frame-like structure to enhance overall rigidity.

[0030] In one possible embodiment, the drive mechanism 20 includes: a double-piston-rod hydraulic cylinder 21, wherein the cylinder body 211 of the double-piston-rod hydraulic cylinder 21 is horizontally fixed in the middle of the crossbeam 13, and two piston rods 212 symmetrically arranged in the cylinder body 211 extend horizontally to both ends of the cylinder body 211 respectively.

[0031] Specifically, the two piston rods 212 share a rodless chamber. The cylinder body 211 of the dual-piston-rod hydraulic cylinder 21 is horizontally fixed to the center of the crossbeam 13 of the frame 10. The two symmetrically arranged piston rods 212 extend horizontally to either end of the cylinder body 211. The rodless chamber of the dual-piston-rod hydraulic cylinder 21 is connected to a pressure oil circuit, where the oil pressure is precisely controlled by a proportional valve. The two piston rods utilize a symmetrical synchronous drive structure, with both ends of the cylinder body 211 connected to the same rodless chamber. Pressurized oil simultaneously propels the pistons on both sides to move synchronously. When the proportional valve is opened, pressurized oil enters the rodless chamber of the cylinder body 211 through the rodless chamber's oil inlet. Because the effective active areas of the two piston rods are identical and the oil pressure is balanced in real time, the pistons on both sides move synchronously in the same direction under the action of the oil pressure, extending or retracting simultaneously. The stroke synchronization error is strictly controlled to ≤1mm. This allows the dual-piston-rod hydraulic cylinder 21 to simultaneously output two sets of horizontal forces in the same direction, namely, simultaneous thrust or tension on the left and right sides, providing a stable, unidirectional drive foundation for the subsequent force conversion mechanism.

[0032] In one possible embodiment, the force conversion mechanism 30 includes: two groups of lower wedge blocks 31, each group of lower wedge blocks 31 is connected to a piston rod 212; two groups of guide rails 32, the two groups of guide rails 32 are symmetrically arranged on both sides of the driving mechanism 20 and fixed on the maintenance platform 11; the length direction of the guide rails 32 is the same as the direction of the horizontal force output by the driving mechanism 20; two groups of upper wedge blocks 33, each group of upper wedge blocks 33 is slidably fitted with each group of lower wedge blocks 31 through an inclined surface; wherein, the two groups of lower wedge blocks 31 move horizontally along the two groups of guide rails 32, and when the area of ​​the fitting area between the lower wedge block 31 and the upper wedge block 33 gradually increases, the corresponding upper wedge block 33 is gradually pushed up under the action of the inclined surface; when the area of ​​the fitting area between the lower wedge block 31 and the upper wedge block 33 gradually decreases, the corresponding upper wedge block 33 gradually falls back.

[0033] Specifically, the force conversion mechanism 30 consists of two sets of lower wedges 31, two sets of guide rails 32, and two sets of upper wedges 33. This mechanism efficiently converts horizontal force into vertical force through a wedge-shaped sliding fit. Each set of lower wedges 31 is threadedly connected to a piston rod 212, allowing the horizontal force of the drive mechanism 20 to be directly transmitted to the wedge system. The two sets of guide rails 32 are symmetrically fixed to the maintenance platform 11, providing horizontal sliding guidance for the lower wedges 31 and ensuring that the motion trajectory is completely consistent with the drive direction. The upper wedges 33 and lower wedges 31 cooperate through inclined surfaces to form a sliding wedge pair, converting horizontal displacement into vertical displacement.

[0034] When the piston rod 212 of the drive mechanism 20 drives the lower wedge 31 to move horizontally, the contact area between the inclined surfaces of the lower wedge 31 and the upper wedge 33 changes dynamically. As the contact area increases, the upper wedge 33 is lifted, generating an upward force component; as the contact area decreases, the upper wedge 33 falls back. The inclined mechanical structure ensures precise conversion of horizontal force into vertical force. The symmetrical arrangement of the two wedge mechanisms ensures that the vertical forces on both sides are always equal in magnitude and direction, avoiding the force deviation caused by traditional unilateral drive and providing stable and synchronized lifting and lowering power for the upper support roller.

[0035] The inclined surfaces of the lower wedge block 31 and the upper wedge block 33 are subjected to surface quenching treatment.

[0036] In a possible implementation manner, the inclination angle of the inclined surface of the lower wedge block 31 is 15-30°.

[0037] Specifically, a smaller inclination angle can amplify the vertical component and improve the lifting sensitivity, but requires a larger horizontal thrust; a larger inclination angle reduces the thrust demand but sacrifices the displacement conversion efficiency; the inclination angle of the inclined plane in the range of 15 to 30 degrees ensures that the drive mechanism 20 can output efficient vertical displacement with a reasonable load to meet the rapid lifting requirements of the upper support roller, and controls the pressure within a reasonable range to avoid wear and jamming, while ensuring the smoothness of movement and taking into account the structural strength and durability.

[0038] In a possible embodiment, the guide rail 32 is L-shaped, and a wear-resistant plate 36 is installed on the surface where the guide rail 32 cooperates with the lower wedge block 31 . The material of the wear-resistant plate 36 is 42CrMo.

[0039] Specifically, a roller 37 is provided at the bottom of the lower wedge 31. The bottom plate of the L-shaped guide rail 32 is used to bear the weight of the entire device, and the side surface is used to protect the bearing of the lower wedge roller 37. The roller 37 provided at the bottom of the lower wedge 31 and the L-shaped guide rail 32 form a rolling friction pair, reducing resistance and wear during horizontal movement. The roller 37 directly bears the weight of the lower wedge and rolls along the bottom plate of the guide rail, which not only disperses concentrated stress, improves the smoothness of movement, but also reduces component heating and loss caused by sliding friction. The bottom plate of the L-shaped guide rail serves as the main load-bearing structure, not only bearing the static and dynamic loads of the entire force conversion mechanism and the upper support roller, but also ensuring movement accuracy through its rigid support. The side surface of the guide rail forms lateral limit protection for the bearing of the roller 37, preventing the roller 37 from shifting or derailing under horizontal impact or vibration. The bottom plate load-bearing and side guidance jointly ensure the stability of load transfer, and enhance the mechanism's ability to resist unbalanced loads under heavy load conditions and its long-term operational reliability.

[0040] In one possible embodiment, each upper wedge block 33 is provided with lugs 34 on both sides perpendicular to the guide rail 32, and the pull rod mechanism 40 includes: a plurality of connecting rods 41, each connecting rod 41 vertically passes through the maintenance platform 11, and the first end of each connecting rod 41 is fixedly connected to a lug 34; a plurality of T-shaped heads 42, the first end of each T-shaped head 42 is threadedly connected to the second end of a connecting rod 41, and the shape of the second end of the T-shaped head 42 matches the T-slot on the top of the upper support roller bearing seat; a guide mechanism 43, the guide mechanism is used to constrain the circumferential rotation of the connecting rod 41 and provide vertical guidance for the connecting rod 41.

[0041] Specifically, each upper wedge block 33 is provided with lugs 34 on both sides perpendicular to the guide rail 32, providing a fixed fulcrum for the connecting rod 41. The connecting rod 41 vertically passes through the maintenance platform 11, and its first end is fixedly connected to the lug 34 by a threaded nut, which directly converts the vertical displacement of the upper wedge block 33 into the vertical lifting movement of the connecting rod. The second end of the connecting rod 41 is screwed to the T-head 42, and the shape of the second end of the T-head matches the T-slot on the top of the upper support roller bearing seat to form a snap-fit ​​connection. When the upper wedge block 33 is raised or lowered, the connecting rod 41 drives the T-head 42 to move synchronously. After the T-head 42 is embedded in the T-slot, it not only transmits vertical tension or pressure, but also constrains the lateral displacement of the bearing seat through the lateral limiting function of the T-slot, ensuring that the upper support roller only moves in the vertical direction.

[0042] The guide mechanism 43 constrains the circumferential rotation of the connecting rod 41 through mechanical limit, avoiding twisting when subjected to force due to the threaded connection between the T-head 42 and the T-slot, and at the same time provides precise vertical guidance for the connecting rod 41 to prevent it from deviating from the motion trajectory due to lateral force or vibration.

[0043] In one possible embodiment, a plurality of oil grooves are provided on the inclined surfaces of the lower wedge block 31 and the upper wedge block 33, and the oil grooves are used to store lubricating grease and bring the grease to the mating area through the relative movement of the inclined surfaces. The force conversion mechanism 30 also includes: a tray 35, which is provided below the lower wedge block 31; the tray 35 is used to collect lubricating grease overflowing from the inclined surface.

[0044] Specifically, the multiple oil grooves provided on the inclined surfaces of the lower wedge block 31 and the upper wedge block 33 store lubricating grease and bring it to the mating area when the inclined surfaces move relative to each other, thereby forming a continuous lubrication effect. The upper surfaces of the lower wedge block 31 and the upper wedge block 33 are provided with oil filling holes, which are connected to the oil grooves. When the driving mechanism 20 drives the lower wedge block 31 to move horizontally, the oil grooves on the inclined surface use frictional contact to squeeze and apply the grease to the contact surface of the lower wedge block 31 and the upper wedge block 33, significantly reducing the sliding friction resistance and wear between the two; at the same time, the tray 35 located below the lower wedge block 31 can collect excess grease overflowing from the inclined surface, preventing grease from dripping and contaminating the equipment or affecting the operation of other components. Among them, the tray 35 is fixed to the bottom of the lower wedge block 31 and moves with the lower wedge block 31.

[0045] In a possible implementation, the plurality of oil grooves are equidistantly distributed longitudinally along the inclined surface of the upper wedge block 33 , and have a depth of 1 to 2 mm.

[0046] Specifically, the longitudinal equidistant distribution ensures uniform coverage of the lubricating grease in all areas of the inclined surface, so that the upper wedge block 33 and the lower wedge block 31 can obtain continuous lubrication effect throughout the entire mating length, avoiding abnormal wear caused by local dry friction; the shallow groove depth of 1~2mm can store a sufficient amount of lubricating grease to meet the lubrication needs of multiple reciprocating motions, and will not weaken the structural strength of the inclined surface or increase the amount of grease overflow due to being too deep. At the same time, the shallow groove design can also make the grease more easily squeezed to the contact interface when the inclined surfaces move relative to each other, forming a stable lubricating film, thereby improving the transmission efficiency and stability of the force conversion mechanism 30 while ensuring wear resistance.

[0047] In a possible embodiment, the guide mechanism 43 includes: an anti-rotation pin 431, the anti-rotation pin 431 passes through the ear 34 and is vertically embedded in the first end of the connecting rod 41, and the anti-rotation pin 431 is used to limit the circumferential rotation of the connecting rod 41; a first linear bearing 432, the first linear bearing 432 is fixed on the maintenance platform 11, the first linear bearing 432 is sleeved on the connecting rod 41, and slides with the connecting rod 41; a second linear bearing 433, the second linear bearing 433 is fixed on the support frame 12, the second linear bearing 433 is sleeved on the connecting rod 41, and slides with the connecting rod 41; wherein, the first linear bearing 432 is located at the first end of the connecting rod 41, and the second linear bearing 433 is located in the middle of the connecting rod 41.

[0048] Specifically, an anti-rotation pin 431 passes through the lug 34 and is vertically embedded in the first end of the connecting rod 41. The pin and the lug cooperate to limit circumferential rotation of the connecting rod, ensuring precise alignment of the T-head 42 with the T-slot of the bearing seat. A first linear bearing 432 is fixed to the maintenance platform 11 and fits over the first end of the connecting rod 41. The support frame 12 is a gate-shaped structure, comprising two columns 121 and a connecting section 122 connecting the two columns 121. A second linear bearing 433 is embedded and fixed at the bottom of the connecting section and fits over the middle of the connecting rod 41. The first and second linear bearings 432 and 433 together provide vertical guidance, distributing the force on the connecting rod and reducing sliding friction, ensuring that the connecting rod moves only axially, avoiding jamming or tilting due to unbalanced loads or vibration, thereby ensuring a smooth and reliable lifting and lowering process for the upper support roller. Linear bearings replace traditional sliding friction with rolling friction between the inner ring of the bearing and the shaft, using rolling elements such as balls or rollers, significantly reducing motion resistance and improving positioning accuracy.

[0049] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A balancing device for a support roller on a skin-passing machine, characterized in that: include: Rack (10); A driving mechanism (20), the driving mechanism (20) being arranged on the frame (10), and the driving mechanism (20) being used to simultaneously output two sets of horizontal forces in opposite directions; A force conversion mechanism (30), the force conversion mechanism (30) being symmetrically connected to the output end of the driving mechanism (20), the force conversion mechanism (30) being used to simultaneously convert each group of the horizontal forces into a corresponding group of vertical forces; each group of the vertical forces has the same direction; A pull rod mechanism (40), wherein a first end of the pull rod mechanism (40) is connected to the force conversion mechanism (30), and a second end of the pull rod mechanism (40) matches a T-slot on the top of the upper support roller bearing seat; When the driving mechanism (20) outputs two groups of horizontal forces that are mutually away from the center direction of the finishing machine, the force conversion mechanism (30) converts the two groups of horizontal forces into two groups of vertical upward forces and drives the pull rod mechanism (40) to move vertically upward, so as to vertically pull up the upper support roller bearing seat.

2. The balancing device for the upper support roller of the skin-pass machine according to claim 1, characterized in that: The frame (10) comprises: Maintenance platform (11); Two groups of support frames (12), the two groups of support frames (12) being arranged at the bottom of the maintenance platform (11) and used for supporting the maintenance platform (11); A crossbeam (13), wherein both ends of the crossbeam (13) are respectively connected to the two groups of support frames (12).

3. The balancing device for the upper support roller of the skin-pass machine according to claim 2, characterized in that: The driving mechanism (20) comprises: A double-piston-rod hydraulic cylinder (21), wherein a cylinder body (211) of the double-piston-rod hydraulic cylinder (21) is horizontally fixed to the middle of the crossbeam (13), and two piston rods (212) symmetrically arranged in the cylinder body (211) extend horizontally toward both ends of the cylinder body (211).

4. The balancing device for the upper support roller of the skin-pass machine according to claim 3, characterized in that: The force conversion mechanism (30) comprises: Two groups of lower wedge blocks (31), each group of the lower wedge blocks (31) is connected to a corresponding piston rod (212); Two sets of guide rails (32), the two sets of guide rails (32) are symmetrically arranged on both sides of the driving mechanism (20) and fixed on the maintenance platform (11); the length direction of the guide rails (32) is the same as the direction of the horizontal force output by the driving mechanism (20); Two groups of upper wedge blocks (33), each group of upper wedge blocks (33) and each group of lower wedge blocks (31) slidingly cooperate with each other via inclined surfaces; The two groups of lower wedge blocks (31) move horizontally along the two groups of guide rails (32). When the area of ​​the matching region between the lower wedge blocks (31) and the upper wedge blocks (33) gradually increases, the corresponding upper wedge blocks (33) are gradually lifted up under the action of the inclined surface. When the area of ​​the matching region between the lower wedge blocks (31) and the upper wedge blocks (33) gradually decreases, the corresponding upper wedge blocks (33) gradually fall back.

5. The balancing device for the upper support roller of the skin-pass machine according to claim 4, characterized in that: The inclination angle of the inclined surface of the lower wedge (31) is 15 to 30 degrees.

6. The balancing device for the upper support roller of a skin-pass machine according to claim 4, characterized in that: The guide rail (32) is L-shaped, and a wear-resistant plate (36) is installed on the surface where the guide rail (32) cooperates with the lower wedge block (31). The material of the wear-resistant plate (36) is 42CrMo.

7. The balancing device for the upper support roller of a skin-pass machine according to claim 4, characterized in that: Each upper wedge (33) is provided with hanging ears (34) on both sides perpendicular to the guide rail (32), and the pull rod mechanism (40) includes: A plurality of connecting rods (41), each connecting rod (41) vertically passing through the maintenance platform (11), and a first end of each connecting rod (41) fixedly connected to a corresponding hanging ear (34); a plurality of T-shaped heads (42), wherein the first end of each T-shaped head (42) is correspondingly threadedly connected to the second end of a connecting rod (41), and the shape of the second end of the T-shaped head (42) matches the T-shaped slot on the top of the upper support roller bearing seat; A guide mechanism (43) is used to constrain the circumferential rotation of the connecting rod (41) and provide vertical guidance for the connecting rod (41).

8. The balancing device for the upper support roller of a skin-pass machine according to claim 4, characterized in that: A plurality of oil grooves are provided on the inclined surfaces of the lower wedge block (31) and the upper wedge block (33), the oil grooves being used to store lubricating grease and to bring the grease to the mating area through relative movement of the inclined surfaces. The force conversion mechanism (30) further comprises: A tray (35) is provided below the lower wedge (31), and the tray (35) is used to collect lubricating grease overflowing from the inclined surface.

9. The balancing device for the upper support roller of a skin-pass machine according to claim 8, characterized in that: The plurality of oil grooves are equidistantly distributed longitudinally along the inclined surface of the upper wedge block (33), and have a depth of 1 to 2 mm.

10. The balancing device for the upper support roller of a skin-pass machine according to claim 7, characterized in that: The guide mechanism (43) comprises: an anti-rotation pin (431), the anti-rotation pin (431) passing through the hanging ear (34) and vertically embedded in the first end of the connecting rod (41), the anti-rotation pin (431) being used to limit circumferential rotation of the connecting rod (41); a first linear bearing (432), the first linear bearing (432) being fixed on the maintenance platform (11), the first linear bearing (432) being sleeved on the connecting rod (41) and slidingly engaged with the connecting rod (41); a second linear bearing (433), the second linear bearing (433) being fixed on the support frame (12), the second linear bearing (433) being sleeved on the connecting rod (41) and slidingly engaged with the connecting rod (41); The first linear bearing (432) is located at the first end of the connecting rod (41), and the second linear bearing (433) is located at the middle of the connecting rod (41).

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