A large-size rolling shear reduction gearbox device
By designing a large-size rolling shear gearbox device and using optimized crankshaft eccentricity and gear coordination, the problem of the current technology being difficult to match the rolling cutting scale and cutting head shear of the medium and thick plate with a width of 5500mm is solved, achieving high-precision and high-efficiency shearing effect.
Patent Information
- Application Number
- CN202510041392.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-10
- Publication Date
- 2025-04-04
AI Technical Summary
The existing medium-thick plate roll-cutting scale and head cutting shearing devices are difficult to effectively match the 5500mm width specification, making it difficult to meet the standards of shear quality and efficiency.
A large-size rolling shear gearbox device is designed, which adopts optimized crankshaft eccentricity, reasonable shear phase angle, gear fit and prestressed main gearbox combination assembly to achieve high-precision rolling cutting ruler and head cutter.
It has achieved high-precision roll-cut ruler and head cutter for 5500mm width specification thick plates, which has improved the quality and efficiency of cutting, and solved the defects of the difficulty of matching large-size widths in the existing technology.
Smart Images
Figure CN119755295A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of rolling shear reduction gearboxes, and in particular relates to a large-size rolling shear reduction gearbox device. Background Art
[0002] Domestic steel enterprises have increasingly higher requirements for product quality, precision and product specifications. Large-size medium and thick plate production lines are undoubtedly a good process to improve the quality, output and efficiency of medium and thick plates. At present, the domestic medium and thick plate rolling cut-to-length and head shear width specifications are 3000mm, 3500mm, 3800mm, 4300mm and 5000mm, but there is a domestic blank for rolling cut-to-length and head shears with a width of 5500mm. For the large-size 5500mm width specification, its transmission form, required crankshaft eccentricity and shearing structure cannot match well with the existing shearing methods of various sizes, resulting in the difficulty of meeting the standards for the shearing quality and efficiency of the 5500mm width specification. Summary of the invention
[0003] The present invention aims at the above-mentioned problems, makes up for the deficiencies of the prior art, and provides a large-size rolling shear reducer device; the present invention can realize rolling-cutting sizing and head-cutting shears for large-size thick plates, especially for thick plates with a width of 5500mm, and has high precision, strong shearing thickness capacity, and good incision quality, thus achieving a breakthrough in the domestic rolling shear from 5000mm to 5500mm.
[0004] To achieve the above purpose, the present invention adopts the following technical solution.
[0005] The present invention provides a large-size rolling shear reduction box device, comprising a middle box and a lower box, wherein the middle box and the lower box are prestressed and assembled by prestressed studs and hydraulic nuts, and characterized in that a primary transmission mechanism and a secondary transmission mechanism are arranged in the middle box, wherein the primary transmission mechanism and the secondary transmission mechanism are linked by a first flat key connection, wherein a third transmission mechanism is arranged in the lower box, wherein the second transmission mechanism and the third transmission mechanism are simultaneously connected to a rotatable intermediate shaft arranged on the lower box, wherein two eccentric main crankshafts are respectively connected to the left and right sides of the third transmission mechanism and drive the two eccentric main crankshafts to rotate, wherein the two ends of the eccentric main crankshaft are respectively supported and installed on the lower box by a first bearing and a second bearing, wherein the total transmission reduction ratio from the primary transmission mechanism to the third transmission mechanism is 41.85, and the eccentricity of the two eccentric main crankshafts is 140 mm.
[0006] Furthermore, the first-stage transmission mechanism includes two first-stage gear shafts and a first-stage large gear, and the two first-stage gear shafts are simultaneously meshed with the first-stage large gear. Both ends of the two first-stage gear shafts are respectively supported by first spherical roller bearings and are installed in the middle box body through a first bearing seat cover and a box cover.
[0007] Furthermore, the secondary transmission mechanism includes a secondary gear shaft and a secondary large gear, the secondary large gear is meshed with the secondary gear shaft, both ends of the secondary gear shaft are supported by second spherical roller bearings, and are installed in the middle box body through the second bearing seat cover and the box cover, the primary large gear is connected to the secondary gear shaft through the first flat key, the secondary large gear is connected to the intermediate shaft through the second combination key and the second flat key, and both ends of the intermediate shaft are supported by third spherical roller bearings and installed on the lower box body.
[0008] Furthermore, the three-stage transmission mechanism includes a three-stage pinion, a three-stage left-side large gear and a three-stage right-side large gear, the three-stage pinion is connected to the intermediate shaft through a first combination key and a fourth flat key, the three-stage left-side large gear and the three-stage right-side large gear are respectively located on both sides of the three-stage pinion and mesh with the three-stage pinion, and the three-stage left-side large gear and the three-stage right-side large gear are respectively connected to the two eccentric main crankshafts through a third combination key and a third flat key.
[0009] Furthermore, the phase angle between the third-stage pinion gear and the third-stage left large gear, and the phase angle between the third-stage pinion gear and the third-stage right large gear is 32.5°.
[0010] Furthermore, a temperature measuring element is provided on the lower box body.
[0011] Beneficial effects of the present invention.
[0012] The present invention adopts technologies such as optimized crankshaft eccentricity, reasonable shear phase angle, gear matching, and prestressed main reduction box combined assembly. The equipment has high precision, strong shear thickness capacity, and good incision quality. It can better realize the rolling cutting sizing and head cutting shears for large specifications, especially 5500mm wide thick plates, achieving a breakthrough in domestic rolling cutting shears from 5000mm to 5500mm. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be understood that the specific implementation methods described herein are only used to explain the present invention and are not used to limit the present invention.
[0014] Figure 1It is a schematic diagram of the axonometric structure of the general assembly of the present invention.
[0015] Figure 2 It is a schematic diagram of the top structure of the present invention.
[0016] Figure 3 It is a side elevational sectional structural schematic diagram of the present invention.
[0017] Figure 4 It is a schematic diagram of the cross-sectional structure of the present invention in a top view.
[0018] Markings in the figure: 1 is the first bearing seat cover, 2 is the first-stage gear shaft, 3 is the first spherical roller bearing, 4 is the first-stage large gear, 5 is the first flat key, 6 is the second spherical roller bearing, 7 is the second-stage gear shaft, 8 is the middle box body, 9 is the prestressed stud, 10 is the hydraulic nut, 11 is the temperature measuring element, 12 is the box cover, 13 is the second bearing seat cover, 14 is the first combination key, 15 is the intermediate shaft, 16 is the lower box body, 17 is the second combination key, 18 is the third-stage left large gear, 19 is the third combination key, 20 is the first bearing shell, 21 is the third-stage small gear, 22 is the third spherical roller bearing, 23 is the second flat key, 24 is the second-stage large gear, 25 is the third-stage right large gear, 26 is the third flat key, 27 is the eccentric main crankshaft, 28 is the second bearing shell, and 29 is the fourth flat key. DETAILED DESCRIPTION
[0019] As shown in the accompanying drawings, this embodiment provides a large-scale rolling shear reduction box device, including a middle box body 8 and a lower box body 16. The middle box body 8 and the lower box body 16 are prestressed and assembled by prestressed studs 9 and hydraulic nuts 10 to ensure high equipment rigidity and low vibration and noise.
[0020] A primary transmission mechanism and a secondary transmission mechanism are arranged in the middle box body 8 , and the primary transmission mechanism and the secondary transmission mechanism are connected and linked with each other through a first flat key 5 .
[0021] The primary transmission mechanism includes two primary gear shafts 2 and a primary large gear 4. The structure of the gear shaft is known in the art, and is an integrated structure of gears and shafts, integrating the functions of the gears and shafts.
[0022] The two primary gear shafts 2 are simultaneously meshed with the primary large gear 4 to realize primary transmission. Both ends of the two primary gear shafts 2 are supported by first spherical roller bearings 3 respectively, and are installed in the middle box body 8 through the first bearing seat cover 1 and the box cover 12.
[0023] The secondary transmission mechanism includes a secondary gear shaft 7 and a secondary large gear 24. The secondary large gear 24 meshes with the secondary gear shaft 7 to complete the secondary transmission. Both ends of the secondary gear shaft 7 are supported by the second spherical roller bearings 6 and are installed in the middle box body 8 through the second bearing seat cover 13 and the box cover 12. The primary large gear 4 is connected to the secondary gear shaft 7 through the first flat key 5. The secondary large gear 24 is connected to the intermediate shaft 15 through the second combination key 17 and the second flat key 23. Both ends of the intermediate shaft 15 are supported by the third spherical roller bearings 22 and installed on the lower box body 16.
[0024] A three-stage transmission mechanism is arranged in the lower housing 16, and the secondary transmission mechanism and the third-stage transmission mechanism are simultaneously connected to the intermediate shaft 15 rotatably arranged on the lower housing 16. The three-stage transmission mechanism includes a three-stage pinion 21, a three-stage left large gear 18 and a three-stage right large gear 25, the three-stage pinion 21 is connected to the intermediate shaft 15 through the first combination key 14 and the fourth flat key 29, the three-stage left large gear 18 and the three-stage right large gear 25 are respectively located on both sides of the three-stage pinion 21 and mesh with the three-stage pinion 21, and two eccentric main crankshafts 27 are respectively connected to the left and right sides of the three-stage transmission mechanism, and the three-stage left large gear 18 and the three-stage right large gear 25 are respectively connected to the two eccentric main crankshafts 27 through the third combination key 19 and the third flat key 26, and the two eccentric main crankshafts 27 are driven to rotate, thereby driving the upper tool holder of the rolling shear to realize the shearing action of the entire rolling shear.
[0025] The two eccentric main crankshafts 27 rotate to drive the upper knife holder of the rolling shear to realize the shearing action of the entire rolling shear, that is, to ensure that the entire upper knife rolls continuously on the lower knife, and the overlap of the two knives is not only small but also uniform. The eccentric main crankshafts 27 are connected to a rod mechanism. Through the optimization of the size of the rod mechanism, the optimized eccentricity of the two eccentric main crankshafts 27 is selected to be 140mm.
[0026] In addition, in order to meet the rotation position of the rod mechanism, the phase angle of the engagement between the third-stage pinion 21 and the third-stage left large gear 18, and the third-stage pinion 21 and the third-stage right large gear 25 is set to 32.5° The two ends of the eccentric main crankshaft 27 are supported and installed on the lower box body 16 through the first bearing 20 and the second bearing 28 respectively. Since the number of steel plates to be sheared by the rolling-cut sizing and head-cutting shears with a width of 5500mm needs to meet 18 to 24 times / min, the total transmission reduction ratio of 41.85 from the first-stage transmission mechanism to the third-stage transmission mechanism is selected through capacity calculation.
[0027] In addition, in order to achieve real-time monitoring of the operating temperature status of key components, a temperature measuring element 11 is provided on the lower box body 16 .
[0028] The working principle of the device is as follows: through a three-stage gear transmission mechanism with a total transmission ratio of 41.85, two first-stage gear shafts 2 simultaneously transmit a first-stage large gear 4, and two motors are used to drive the two first-stage gear shafts 2 respectively. Such a transmission mechanism can not only increase the speed ratio of the first-stage transmission, but also improve the strength of the first-stage pinion; the second-stage transmission is to transmit the second-stage large gear 24 to realize the second-stage reduction of the reduction box through the second-stage gear shaft 7 output from the first-stage transmission; the third-stage transmission is to transmit the third-stage left large gear 18 and the third-stage right large gear 25 through the third-stage small gear 21 output from the second-stage transmission at the same time, and the third-stage left large gear 18 and the third-stage right large gear 25 respectively drive the two eccentric main crankshafts 27 to rotate and drive the upper of the rolling shear The tool holder realizes the shearing action of the entire rolling shear, that is, it is necessary to ensure that the entire upper knife rolls continuously on the lower knife, and the overlap of the two knives is not only small but also uniform. Therefore, the eccentricity of the two eccentric main crankshafts 27 is optimized to 140mm, and the phase angle of the meshing of the three-stage small gear 21 with the three-stage left large gear 18 and the three-stage right large gear 25 is 32.5°. The gears are forged and the box body is welded. Prestressed studs 9 and hydraulic nuts 10 are used between the lower box body 16 and the middle box body 8 to form a prestressed combined assembly connection, ensuring that the equipment has high rigidity, strong ability to shear steel plate thickness, good shear cut quality, low vibration and noise, etc., and automatic monitoring and detection and automatic control of the equipment operation status are realized through the temperature measuring element 11.
[0029] It can be understood that the above specific description of the present invention is only used to illustrate the present invention and is not limited to the technical solutions described in the embodiments of the present invention. Those skilled in the art should understand that the present invention can still be modified or replaced by equivalents to achieve the same technical effects; as long as the use requirements are met, they are within the protection scope of the present invention.
Claims
1. A large-size rolling shear reduction gearbox device, comprising a middle box (8) and a lower box (16), wherein the middle box (8) and the lower box (16) are prestressedly assembled by means of prestressed studs (9) and hydraulic nuts (10), characterized in that: A primary transmission mechanism and a secondary transmission mechanism are arranged in the middle housing (8), and the primary transmission mechanism and the secondary transmission mechanism are connected to each other via a first flat key (5) for linkage. A third transmission mechanism is arranged in the lower housing (16), and the second transmission mechanism and the third transmission mechanism are simultaneously connected to a rotatable intermediate shaft (15) arranged on the lower housing (16). Two eccentric main crankshafts (27) are connected to the left and right sides of the third transmission mechanism respectively, and drive the two eccentric main crankshafts (27) to perform rotational movement. The two ends of the eccentric main crankshaft (27) are supported and mounted on the lower housing (16) via a first bearing (20) and a second bearing (28), respectively. The total transmission reduction ratio from the primary transmission mechanism to the third transmission mechanism is 41.85, and the eccentricity of the two eccentric main crankshafts (27) is 140 mm.
2. A large-size rolling shear reduction gearbox device according to claim 1, characterized in that: The primary transmission mechanism comprises two primary gear shafts (2) and a primary large gear (4), the two primary gear shafts (2) meshing with the primary large gear (4) at the same time, the two primary gear shafts (2) being supported at both ends by first spherical roller bearings (3) respectively, and being installed in the middle box body (8) via a first bearing seat cover (1) and a box cover (12).
3. A large-size rolling shear reduction gearbox device according to claim 2, characterized in that: The secondary transmission mechanism comprises a secondary gear shaft (7) and a secondary large gear (24), the secondary large gear (24) being meshed with the secondary gear shaft (7), the two ends of the secondary gear shaft (7) being supported by second spherical roller bearings (6), and being mounted in the middle housing (8) via a second bearing seat cover (13) and the housing cover (12), the first large gear (4) being connected to the secondary gear shaft (7) via the first flat key (5), the second large gear (24) being connected to the intermediate shaft (15) via a second combination key (17) and a second flat key (23), and the two ends of the intermediate shaft (15) being supported by third spherical roller bearings (22) and being mounted on the lower housing (16).
4. A large-size rolling shear reduction gearbox device according to claim 3, characterized in that: The three-stage transmission mechanism comprises a three-stage pinion (21), a three-stage left-side large gear (18) and a three-stage right-side large gear (25); the three-stage pinion (21) is connected to the intermediate shaft (15) via a first combination key (14) and a fourth flat key (29); the three-stage left-side large gear (18) and the three-stage right-side large gear (25) are respectively located on both sides of the three-stage pinion (21) and mesh with the three-stage pinion (21); the three-stage left-side large gear (18) and the three-stage right-side large gear (25) are respectively connected to the two eccentric main crankshafts (27) via a third combination key (19) and a third flat key (26).
5. A large-size rolling shear reduction gearbox device according to claim 4, characterized in that: The phase angles at which the third-stage pinion gear (21) and the third-stage left-side large gear (18) mesh, and the third-stage pinion gear (21) and the third-stage right-side large gear (25) mesh are 32.5°.
6. A large-size rolling shear reduction gearbox device according to claim 1, characterized in that: The lower box (16) is provided with a temperature measuring element (11).