Aluminum plate strip hot rolling mill main breakdown gearbox

Abstract

This invention relates to the field of transmission gearbox technology and discloses a main blanking gearbox for an aluminum sheet and strip hot rolling mill. The gearbox includes a housing, with a first input shaft and a second input shaft rotatably mounted side-by-side on the left side of the housing. A first output shaft and a second output shaft are longitudinally arranged side-by-side between the two. The left ends of the first input shaft, the second input shaft, and the first output shaft are driven by a first gear set, while the right ends of the first output shaft and the second output shaft are driven by a second gear set. The housing includes an upper housing for the input shaft and a housing for the output shaft. The upper housing for the input shaft covers the first input shaft, the second input shaft, and the first output shaft. The housing for the output shaft is located on the right side of the housing and covers the second gear set. Both the upper housing for the input shaft and the housing for the output shaft integrate independent oil circulation components. This invention improves the gearbox's load-bearing capacity and transmission stability, achieves precise lubrication and cooling of each transmission component, improves lubricant utilization, and further ensures long-term stable operation of the equipment.

Description

Technical Field

[0001] This invention relates to the field of transmission gearbox technology, and more particularly to a main blanking gearbox for an aluminum sheet and strip hot rolling mill. Background Technology

[0002] The main billet-making process of the hot rolling mill for aluminum sheet and strip is the core link in the production of aluminum sheet and strip. As a key power transmission component in this process, the gearbox must withstand high loads, high speeds and frequent impact loads during the hot rolling process. Its operational stability, load-bearing capacity and ease of maintenance directly affect the production efficiency and product quality of aluminum sheet and strip.

[0003] A transmission gearbox with announcement number CN214367638U includes a gearbox body. An input shaft is rotatably connected to the right surface of the gearbox body, a first output shaft is slidably connected to the rear surface of the gearbox body, a second output shaft is rotatably connected to the left surface of the gearbox body, and an adjustment handle is rotatably connected to the front surface of the gearbox body. Rotating the adjustment handle causes a connecting plate to rotate from a horizontal to a vertical position, thus changing its height. When the connecting plate rotates, a slider pushes a fixed frame and a moving frame upwards. Simultaneously, the rotating plate causes the slider to slide inside the fixed frame. The upward movement of the moving frame causes a worm gear to move upwards. When the worm gear moves upwards, it engages with a worm wheel. The rotation of the worm gear drives the worm wheel to rotate, which in turn drives the second output shaft to rotate, thus achieving bidirectional drive. This improves the energy utilization rate of the gearbox body and avoids wasting power.

[0004] However, the aforementioned transmission gearboxes do not have good temperature control, have lubrication blind spots, and have low lubricant utilization, which can easily lead to problems such as component overheating and accelerated wear. Similarly, in existing technologies, lubrication systems are mostly centralized oil supply systems, which cannot achieve precise lubrication of each transmission component.

[0005] Therefore, those skilled in the art urgently need to develop a main billet gearbox for hot rolling mills of aluminum sheet and strip. Summary of the Invention

[0006] The purpose of this invention is to overcome the shortcomings of the prior art and to propose a main billet gearbox for a hot rolling mill of aluminum sheet and strip.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: a main billet gearbox for a hot rolling mill of aluminum sheet and strip, comprising a housing, wherein a first input shaft and a second input shaft are rotatably mounted on the left side of the housing in the horizontal direction, the first input shaft and the second input shaft are arranged side by side in the horizontal direction, and the right ends of both are located inside the housing;

[0008] A first output shaft and a second output shaft are provided between the first input shaft and the second input shaft. The first output shaft and the second output shaft are arranged longitudinally side by side, and the right ends of both extend through and out of the housing. The first output shaft is located on the central axis between the first input shaft and the second input shaft. The left ends of the first input shaft, the second input shaft, and the first output shaft are driven by a first gear set, and the right ends of the first output shaft and the second output shaft are driven by a second gear set. The housing includes a split input shaft upper housing and an output shaft housing. The input shaft upper housing is positioned above the first input shaft, the second input shaft, and the first output shaft. The output shaft housing is located on the right side of the housing and houses the second gear set. Both the input shaft upper housing and the output shaft housing have integrated independent oil circulation components.

[0009] Preferably, the oil circulation assembly includes an input shaft oil baffle plate disposed on the inner side of the upper housing of the input shaft. The input shaft oil baffle plate is connected to the upper housing of the input shaft via an input shaft bearing seat. The input shaft bearing seat includes two input shaft bearing seats one and one input shaft bearing seat two, all of which are upwardly curved arched structures. The input shaft bearing seat two is located above the first output shaft. The two input shaft bearing seats one are symmetrically disposed on the left and right sides of the input shaft bearing seat two, and are respectively located above the first input shaft and the second input shaft. Both the two input shaft bearing seats one and the input shaft bearing seat two have multiple vertically penetrating input shaft oil passages equidistantly opened along their length direction.

[0010] Preferably, the oil circulation assembly further includes an output shaft oil baffle plate disposed inside the output shaft housing. The output shaft oil baffle plate is connected to the output shaft housing via an output shaft bearing seat. The output shaft bearing seat has a gourd-shaped profile with upper and lower double circles. The bearing portions of the first and second output shafts are both embedded inside the output shaft bearing seat. The output shaft bearing seat has multiple through-type output shaft oil passages equidistantly opened along its profile direction.

[0011] Preferably, the first gear set includes a first driving tooth, a second driving tooth, and a driven tooth on the input shaft. The first driving tooth is fixedly sleeved on the first input shaft, the second driving tooth is fixedly sleeved on the second input shaft, and the driven tooth is fixedly sleeved on the first output shaft. The driven tooth is located between the first driving tooth and the second driving tooth and simultaneously meshes with the first driving tooth and the second driving tooth on both sides of the input shaft, forming a dual-input single-output transmission structure.

[0012] Preferably, the second gear set includes an output shaft driving gear and an output shaft driven gear. The output shaft driving gear is fixedly sleeved on the first output shaft, and the output shaft driven gear is fixedly sleeved on the second output shaft. The output shaft driving gear and the output shaft driven gear mesh with each other for transmission.

[0013] Preferably, both the first gear set and the second gear set are herringbone gears, the first driving tooth of the input shaft and the second driving tooth of the input shaft have the same number of teeth, the driving tooth of the output shaft and the driven tooth of the output shaft have the same number of teeth, and the driven tooth of the input shaft has a greater number of teeth than the first driving tooth of the input shaft and the second driving tooth of the input shaft.

[0014] Preferably, the bottom of the housing is provided with an oil collection tank, which is connected to the oil inlet of the oil circulation component through an oil pump to form a closed-loop oil circulation circuit.

[0015] Compared with the prior art, the beneficial effects of the present invention are: The gearbox of this invention achieves the following core technical effects through optimization of the transmission structure, housing design, and lubrication system: First, it enhances the gearbox's load-bearing capacity and transmission stability, adapting to the high-load and high-impact working conditions of the main billet opening of hot rolling mills; second, it counteracts axial forces during transmission, reducing gear and bearing wear and extending equipment service life; third, it achieves dual-input convergence and dual-output splitting of power, ensuring synchronized output speeds to match the working requirements of hot rolling mills; and fourth, it achieves precise lubrication and cooling of each transmission component, improving lubricant utilization and further ensuring long-term stable operation of the equipment. Attached Figure Description

[0016] Figure 1 This is a front view structural diagram of the present invention; Figure 2 The internal transmission principle of this invention Figure One ; Figure 3 The internal transmission principle of this invention Figure Two ; Figure 4 This is a structural diagram of the housing on the input shaft described in this invention; Figure 5 This is a structural diagram of the input shaft bearing housing described in this invention; Figure 6 This is a structural diagram of the output shaft housing described in this invention; Figure 7 This is a structural diagram of the output shaft bearing housing described in this invention.

[0017] In the diagram: 1-Box housing; 2-First input shaft; 3-Second input shaft; 4-First output shaft; 5-Second output shaft; 6-First driving gear of input shaft; 7-Second driving gear of input shaft; 8-Driven gear of input shaft; 9-Driving gear of output shaft; 10-Upper box housing of input shaft; 11-Oil baffle of input shaft; 12-Input shaft bearing housing one; 13-Input shaft bearing housing two; 14-Oil passage of input shaft; 15-Box housing of output shaft; 16-Oil baffle of output shaft; 17-Oil baffle of output shaft; 18-Oil passage of output shaft; 19-Driven gear of output shaft. Detailed Implementation

[0018] The present invention will now be clearly described with reference to the accompanying drawings and specific embodiments. This description is merely illustrative and is not intended to limit the scope of the invention. Any modifications, equivalent substitutions, or improvements made by those skilled in the art based on the embodiments of the present invention without inventive effort to obtain all other embodiments should be included within the scope of protection of the present invention.

[0019] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0020] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0021] Example 1 Please see Figures 1-3 The present invention provides a technical solution: a main blanking gearbox for a hot rolling mill of aluminum sheet and strip, including a housing 1. The housing 1 is integrally cast from high-strength cast iron to ensure structural rigidity and load-bearing capacity. A first input shaft 2 and a second input shaft 3 are rotatably mounted on the left side of the housing 1 in the horizontal direction. The first input shaft 2 and the second input shaft 3 are arranged side by side in the horizontal direction, and the right ends of both are located inside the housing 1 for installing transmission gears. The left ends of both extend to the outside of the housing 1 for connecting with the drive mechanism.

[0022] A first output shaft 4 and a second output shaft 5 are provided between the first input shaft 2 and the second input shaft 3. The first output shaft 4 and the second output shaft 5 are arranged longitudinally side by side, and the right ends of both extend through and out of the housing 1 for connection with the subsequent actuator to realize power output.

[0023] To ensure the stability and symmetry of the transmission, the first output shaft 4 is located on the central axis of the first input shaft 2 and the second input shaft 3. The left ends of the first input shaft 2, the second input shaft 3 and the first output shaft 4 are driven by the meshing of the first gear set, which combines the dual input power into the first output shaft 4. The right ends of the first output shaft 4 and the second output shaft 5 are driven by the meshing of the second gear set, which realizes the split output of power and meets the power transmission requirements of the main billet of the hot rolling mill.

[0024] Furthermore, the first gear set includes a first driving tooth 6, a second driving tooth 7, and a driven tooth 8 on the input shaft. The first driving tooth 6 is fixedly sleeved on the first input shaft 2 by a flat key, the second driving tooth 7 is fixedly sleeved on the second input shaft 3 by a flat key, and the driven tooth 8 is fixedly sleeved on the first output shaft 4 by a flat key. The driven tooth 8 is located between the first driving tooth 6 and the second driving tooth 7 on the input shaft, and simultaneously meshes with the first driving tooth 6 and the second driving tooth 7 on both sides of the input shaft, forming a dual-input single-output transmission structure, which can effectively distribute the load of single-shaft input and improve the load-bearing capacity of the gearbox.

[0025] Furthermore, the second gear set includes an output shaft driving gear 9 and an output shaft driven gear 19. The output shaft driving gear 9 is fixedly sleeved on the first output shaft 4 by a flat key, and the output shaft driven gear 19 is fixedly sleeved on the second output shaft 5 by a flat key. The output shaft driving gear 9 and the output shaft driven gear 19 mesh with each other to realize the power transmission from the first output shaft to the second output shaft, ensuring the synchronous rotation speed of the two output shafts and meeting the synchronous requirements of power output during the hot rolling mill billet opening process.

[0026] Furthermore, both the first and second gear sets are herringbone gears. Herringbone gears can effectively counteract the axial force generated during transmission, reduce gear wear and vibration, and improve transmission stability. The first driving gear 6 and the second driving gear 7 on the input shaft have the same number of teeth, ensuring that the power transmitted from the two input shafts to the first output shaft 4 is balanced and avoiding load imbalance. The driving gear 9 and the driven gear 19 on the output shaft have the same number of teeth, ensuring consistent rotational speed. The driven gear 8 on the input shaft has a greater number of teeth than the first driving gear 6 and the second driving gear 7 on the input shaft, achieving speed reduction and torque increase during power transmission, meeting the power requirements for low speed and high torque during the main billet opening process of the aluminum sheet and strip hot rolling mill.

[0027] Furthermore, to improve the ease of assembly and maintenance of the gearbox, the first input shaft 2, the second input shaft 3, the first output shaft 4, and the second output shaft 5 are all rotatably coupled to the housing 1 via deep groove ball bearings. Seals are provided at the mating points between the bearings and the housing 1 to prevent lubricating oil leakage and to prevent external dust and impurities from entering the housing, thereby extending the service life of the gears and bearings.

[0028] The transmission structure, employing a dual-input single-output re-splitting design, effectively disperses the input load, enhances the overall load-bearing capacity of the gearbox, and is suitable for the high-load operation requirements of the main billet opening stage of aluminum sheet and strip hot rolling mills. The application of herringbone gears offsets axial forces, reduces transmission vibration and gear wear, and improves transmission stability and equipment operational reliability. The reasonable tooth ratio achieves speed reduction and torque increase, precisely matching the power parameters required for billet opening in hot rolling mills. The overall structural layout is symmetrical and reasonable, with high transmission efficiency and convenient assembly and maintenance, reducing equipment operation and maintenance costs.

[0029] Example 2 Please see Figures 1-7 Based on Embodiment 1, the housing structure and lubrication system are optimized and improved. The specific solution is as follows: The housing 1 includes a split input shaft upper housing 10 and an output shaft housing 15. The input shaft upper housing 10 is installed above the first input shaft 2, the second input shaft 3 and the first output shaft 4. The output shaft housing 15 is located on the right side of the housing 1 and covers the second gear set.

[0030] To achieve precise lubrication and cooling of each transmission component of the gearbox, independent oil circulation components are integrated on the input shaft housing 10 and the output shaft housing 15, respectively, to provide targeted lubrication for the first gear set, input shaft bearing, second gear set, and output shaft bearing, avoiding lubrication blind spots and improving lubrication effect.

[0031] Furthermore, the oil circulation assembly includes an input shaft oil baffle 11 located inside the upper housing 10 of the input shaft. The input shaft oil baffle 11 is connected to the upper housing 10 of the input shaft via an input shaft bearing housing. The input shaft bearing housing includes two input shaft bearing housings 12 and one input shaft bearing housing 13, all of which are upwardly curved arched structures. This adapts to the installation posture of the input shaft and enhances the structural strength of the bearing housing, preventing deformation under stress.

[0032] The input shaft bearing housing 2 13 is located above the first output shaft 4. Two input shaft bearing housings 12 are symmetrically arranged on the left and right sides of the input shaft bearing housing 2 13, and are respectively located above the first input shaft 2 and the second input shaft 3, precisely aligned with the bearings of each shaft. Both the two input shaft bearing housings 12 and the input shaft bearing housing 2 13 have multiple vertically penetrating input shaft oil passages 14 equidistantly opened along their length direction. Lubricating oil can be precisely dripped onto each gear and bearing through the input shaft oil passages 14 to achieve lubrication, while also carrying away the heat generated during the transmission process.

[0033] Furthermore, the oil circulation assembly also includes an output shaft oil baffle 16 located inside the output shaft housing 15. The output shaft oil baffle 16 is connected to the output shaft housing 15 via an output shaft bearing seat 17. The output shaft bearing seat 17 has a gourd-shaped profile with upper and lower double circles. The bearing portions of the first output shaft 4 and the second output shaft 5 are both embedded inside the output shaft bearing seat 17, achieving precise positioning and stable support of the bearings.

[0034] Multiple through-type output shaft oil passages 18 are provided on the output shaft bearing housing 17 at equal intervals along its contour direction. Lubricating oil flows through the output shaft oil passages 18 to the second gear set and the output shaft bearing to achieve lubrication and cooling. At the same time, the output shaft oil baffle 16 can prevent lubricating oil from splashing and ensure the stability of the oil circuit circulation.

[0035] Furthermore, the bottom of the housing 1 is equipped with an oil collection trough (not shown in the figure). The oil collection trough is designed with an inclination to facilitate the collection of lubricating oil. The lowest point of the oil collection trough is connected to the oil inlet of the oil circuit circulation component through an oil pump. The oil pump is a gear-type oil pump to ensure stable oil delivery pressure and realize the recycling of lubricating oil, forming a closed-loop circulation oil circuit system. At the same time, a filter screen is installed in the oil collection trough to filter impurities in the lubricating oil, prevent impurities from entering the gear and bearing clearances, reduce wear, and extend the service life of lubricating oil and equipment components.

[0036] The split-type housing structure allows for separate maintenance of input and output components, significantly improving the convenience of equipment operation and maintenance and reducing maintenance costs. An independent oil circulation assembly ensures precise lubrication of each transmission component, avoiding lubrication blind spots. Simultaneously, the closed-loop circulation system allows for the reuse of lubricating oil, saving on lubrication costs. The oil baffle prevents lubricating oil splashing, and the rational layout of the oil channels ensures uniform lubrication, effectively removing transmission heat, reducing component temperature rise, and extending the service life of vulnerable parts such as gears and bearings. The inclined oil collection trough and filter design improve the cleanliness of the lubricating oil, further enhancing the reliability and stability of equipment operation, and adapting to the long-term continuous operation requirements of hot rolling mills.

[0037] Working principle of this invention: 1. An external drive mechanism drives the first input shaft 2 and the second input shaft 3 to rotate synchronously. The first input shaft 2 drives the first active gear 6 of the input shaft fixed on it to rotate, and the second input shaft 3 drives the second active gear 7 of the input shaft fixed on it to rotate synchronously, thereby realizing dual power input.

[0038] 2. Since the driven tooth 8 of the input shaft meshes with both the first driving tooth 6 and the second driving tooth 7 of the input shaft, and the first driving tooth 6 and the second driving tooth 7 of the input shaft have the same number of teeth, the power transmitted by the two input shafts is merged into the driven tooth 8 of the input shaft through gear meshing, driving the first output shaft 4 to rotate, realizing the power convergence of dual input and single output. At the same time, through the difference in the number of teeth between the driven tooth 8 of the input shaft and the two driving teeth, speed reduction and torque increase are achieved, meeting the low-speed and high-torque requirements of the hot rolling mill for billet opening.

[0039] 3. When the first output shaft 4 rotates, it drives the output shaft drive gear 9 fixed at its right end to rotate. The output shaft drive gear 9 meshes with the output shaft driven gear 19, and the two have the same number of teeth. Therefore, the output shaft drive gear 9 drives the output shaft driven gear 19 to rotate synchronously, which in turn drives the second output shaft 5 to rotate, realizing the power splitting from the first output shaft 4 to the second output shaft 5, ensuring that the speed of the two output shafts is consistent, and providing a stable dual-path power output for the main billet opening mechanism of the hot rolling mill.

[0040] 4. During the operation of the gearbox, the oil pump extracts the lubricating oil from the oil collection groove at the bottom of the housing 1 and delivers it to the oil circulation components of the housing 10 on the input shaft and the housing 15 on the output shaft. The lubricating oil on the input side drips precisely onto the first gear set and each input shaft bearing through the input shaft oil passage 14 on the input shaft bearing seat, achieving lubrication and cooling. The lubricating oil on the output side flows through the output shaft oil passage 18 on the output shaft bearing seat 17, passing through the second gear set and each output shaft bearing, completing lubrication and cooling. The lubricated oil falls back to the oil collection groove at the bottom of the housing under the action of gravity. After being filtered by the filter screen, it is extracted by the oil pump again for recycling, forming a closed lubrication cycle.

[0041] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A main gearbox for hot rolling mill of aluminum sheet and strip, comprising a housing, characterized in that: The left side of the housing is rotatably equipped with a first input shaft and a second input shaft. The first input shaft and the second input shaft are arranged side by side in the horizontal direction, and the right ends of both are located inside the housing. A first output shaft and a second output shaft are provided between the first input shaft and the second input shaft. The first output shaft and the second output shaft are arranged longitudinally side by side, and the right ends of both extend through and out of the housing. The first output shaft is located on the central axis between the first input shaft and the second input shaft. The left ends of the first input shaft, the second input shaft, and the first output shaft are driven by a first gear set, and the right ends of the first output shaft and the second output shaft are driven by a second gear set. The housing includes a split input shaft upper housing and an output shaft housing. The input shaft upper housing is positioned above the first input shaft, the second input shaft, and the first output shaft. The output shaft housing is located on the right side of the housing and houses the second gear set. Both the input shaft upper housing and the output shaft housing have integrated independent oil circulation components.

2. The main gearbox for hot rolling mill of aluminum sheet and strip according to claim 1, characterized in that: The oil circulation assembly includes an input shaft oil baffle plate located inside the upper housing of the input shaft. The input shaft oil baffle plate is connected to the upper housing of the input shaft via an input shaft bearing seat. The input shaft bearing seat includes two input shaft bearing seats one and one input shaft bearing seat two, all of which are upwardly curved arched structures. The input shaft bearing seat two is located above the first output shaft. The two input shaft bearing seats one are symmetrically arranged on the left and right sides of the input shaft bearing seat two, and are respectively located above the first input shaft and the second input shaft. Both the two input shaft bearing seats one and the input shaft bearing seat two have multiple vertically penetrating input shaft oil passages equidistantly opened along their length direction.

3. The main gearbox for hot rolling mill of aluminum sheet and strip according to claim 2, characterized in that: The oil circulation assembly also includes an output shaft oil baffle plate disposed inside the output shaft housing. The output shaft oil baffle plate is connected to the output shaft housing via an output shaft bearing seat. The output shaft bearing seat has a gourd-shaped profile with upper and lower double circles. The bearing portions of the first and second output shafts are both embedded inside the output shaft bearing seat. The output shaft bearing seat has multiple through-type output shaft oil passages equidistantly opened along its profile direction.

4. The main gearbox for hot rolling mill of aluminum sheet and strip according to claim 1, characterized in that: The first gear set includes a first driving tooth, a second driving tooth, and a driven tooth. The first driving tooth is fixedly sleeved on the first input shaft, the second driving tooth is fixedly sleeved on the second input shaft, and the driven tooth is fixedly sleeved on the first output shaft. The driven tooth is located between the first driving tooth and the second driving tooth and simultaneously meshes with the first and second driving teeth on both sides of the input shaft to form a dual-input single-output transmission structure.

5. The main gearbox for hot rolling mill of aluminum sheet and strip according to claim 4, characterized in that: The second gear set includes an output shaft driving gear and an output shaft driven gear. The output shaft driving gear is fixedly sleeved on the first output shaft, and the output shaft driven gear is fixedly sleeved on the second output shaft. The output shaft driving gear and the output shaft driven gear mesh with each other for transmission.

6. The main gearbox for hot rolling mill of aluminum sheet and strip according to claim 5, characterized in that: Both the first gear set and the second gear set are herringbone gears. The first driving tooth and the second driving tooth of the input shaft have the same number of teeth. The driving tooth of the output shaft and the driven tooth of the output shaft have the same number of teeth. The driven tooth of the input shaft has a greater number of teeth than the first driving tooth and the second driving tooth of the input shaft.

7. The main gearbox for hot rolling mill of aluminum sheet and strip according to claim 3, characterized in that: The bottom of the housing is provided with an oil collection tank, which is connected to the oil inlet of the oil circulation component through an oil pump to form a closed-loop oil circulation circuit.

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