Horizontal rolling mill gearbox with variable gear ratio

Abstract

The utility model discloses a horizontal rolling mill gearbox with a variable speed ratio, which comprises a case and a transmission shaft, an input shaft and two output shafts which are parallel to each other are rotatably mounted on the case, the transmission shaft is rotatably mounted in the case and is parallel to the input shaft, and the transmission shaft is in transmission connection with the two output shafts through a transmission assembly. The input shaft is in transmission connection with the transmission shaft through a gear transmission structure, and the transmission ratio of the gear transmission structure is adjustable. The gear shifting effect of the gear box is achieved by adjusting the transmission ratio of the gear transmission structure, power needed by various different rolling working conditions is met, applicability is high, production efficiency is high, production input cost is reduced, and product production stability is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of gearboxes, and more particularly to a variable speed ratio horizontal rolling mill gearbox. Background Technology

[0002] In the field of metal rolling, the mill gearbox, as a core component for transmitting torque and speed, directly determines the adaptability of the rolling process and production efficiency. Traditional horizontal mill combined gearboxes typically adopt a fixed transmission ratio structure, achieving power output for different rolling conditions through the combination of multiple gearboxes or frequent replacement of gear pairs.

[0003] However, this design has the following drawbacks:

[0004] Insufficient adaptability to working conditions: The fixed transmission ratio of traditional gearboxes is difficult to meet the differentiated torque and speed requirements of bar and wire rolling at the same time. Especially when switching between high-speed rolling and low-speed rolling, it is necessary to rely on external equipment to adjust or stop the machine to replace gears, resulting in low production efficiency.

[0005] Equipment redundancy and high costs: In order to achieve multi-process coverage, multiple gearboxes with different transmission ratios need to be configured, which not only occupies a lot of factory space, but also significantly increases the costs of equipment procurement, maintenance and energy consumption.

[0006] Dynamic response lag: Traditional structures lack a real-time adjustment mechanism, making it difficult to quickly match power output when rolling load changes abruptly or process parameters are adjusted, thus affecting product quality stability. Utility Model Content

[0007] In view of the aforementioned problems with existing rolling mill gearboxes, the aim is to provide a horizontal rolling mill gearbox with a variable speed ratio.

[0008] The specific technical solution is as follows:

[0009] A variable speed ratio horizontal rolling mill gearbox includes:

[0010] A chassis on which parallel input shafts and two output shafts are rotatably mounted;

[0011] A drive shaft is rotatably mounted inside the housing and parallel to the input shaft. The drive shaft is connected to the two output shafts via a transmission assembly. The input shaft is connected to the drive shaft via a gear transmission structure, and the transmission ratio of the gear transmission structure is adjustable.

[0012] As a further improvement and optimization of this solution, the gear transmission structure includes: two gear sets with different transmission ratios and a shifting mechanism. Each gear set includes a driving gear and a driven gear. The driving gear is coaxially mounted on the input shaft, and the driven gear is rotatably sleeved on the outside of the transmission shaft.

[0013] The shifting mechanism is located between the two driven gears and the transmission shaft, and can operably connect one of the driven gears to the transmission shaft.

[0014] As a further improvement and optimization of this solution, the shifting mechanism includes:

[0015] Two gear shifters are coaxially connected to the opposite end faces of the two driven gears, and each gear shifter has a first external spline on its exterior.

[0016] A transmission gear, which is coaxially connected to the outside of the transmission shaft and located between the two gearboxes, has a second external spline on its exterior.

[0017] A coupling sleeve, the inner wall of which has an internal spline, and the coupling sleeve is slidably sleeved on the outside of the transmission gear, and the internal spline is always engaged with the second external spline;

[0018] A lever assembly is drivenly connected to the engagement cylinder and is used to move the engagement cylinder to slide axially so that the internal spline engages with one of the first external splines.

[0019] As a further improvement and optimization of this solution, the lever assembly includes:

[0020] The dial ring has a limiting groove on the outer ring of the connecting cylinder, and the dial ring is coaxially disposed in the limiting groove.

[0021] At least one mounting block, said mounting block being rotatably disposed outside the dial ring;

[0022] A rotating shaft, which is installed inside the chassis;

[0023] At least one lever, one end of which is connected to the outer wall of the rotating shaft and the other end is axially slidably mounted on the mounting block;

[0024] A handle, one end of which is connected to one end of the rotating shaft, is used to rotate the rotating shaft by turning the handle, thereby causing the connecting cylinder to slide axially.

[0025] As a further improvement and optimization of this solution, the transmission ratio of each gear set is greater than one.

[0026] As a further improvement and optimization of this solution, the transmission component includes:

[0027] An intermediate shaft is arranged parallel to the drive shaft and is installed inside the chassis.

[0028] A first transmission component is connected between the transmission shaft and the intermediate shaft.

[0029] A second transmission component is drivingly connected between the intermediate shaft and one of the output shafts;

[0030] The third transmission component is connected between the two output shafts.

[0031] As a further improvement and optimization of this solution, the first transmission component and the second transmission component are both gear set structures with a transmission ratio greater than one, and the third transmission component is a gear set structure with a transmission ratio equal to one.

[0032] As a further improvement and optimization of this solution, one of the output shafts is a long shaft and the other output shaft is a short shaft, and the input shaft, the transmission shaft, the intermediate shaft, the long shaft and the short shaft are arranged in sequence;

[0033] The second transmission component is driven between the intermediate shaft and the long shaft, and the third transmission component is driven between the long shaft and the short shaft.

[0034] As a further improvement and optimization of this solution, the lever assembly also includes a pin component, which is disposed between the handle and the chassis to lock the position of the handle.

[0035] As a further improvement and optimization of this solution, the other end of the handle has a grip.

[0036] The positive effects of the above technical solution compared with the existing technology are:

[0037] (1) In this utility model, the gear ratio of the gear transmission structure is adjusted to achieve the gear shifting effect, which meets the power required by various rolling conditions. It is not only highly applicable and efficient, but also improves the production input cost and the stability of product production.

[0038] (2) In this utility model, when switching the gearbox speed ratio, the handle is turned, the handle drives the rotating shaft to rotate, and the rotating shaft drives the lever to rotate around the rotating shaft axially. Since the mounting block and the dial ring are rotatably connected, and the lever and the mounting block are slidably connected, while the lever rotates, it will drive the dial ring to drive the coupling cylinder to move axially, thereby realizing the adjustment of the equipment speed ratio. The operation is convenient. Attached Figure Description

[0039] Fig. 1 This is a schematic diagram of the structure of a variable speed ratio horizontal rolling mill gearbox according to the present invention;

[0040] Fig. 2 This is a schematic diagram of the lever assembly of a variable speed ratio horizontal rolling mill gearbox according to the present invention;

[0041] Fig. 3 This is a schematic diagram of the pin component of a variable speed ratio horizontal rolling mill gearbox according to the present invention;

[0042] In the attached diagram: 1. Chassis; 2. Input shaft; 3. Drive shaft; 4. Gear set; 5. Shifting mechanism; 6. Intermediate shaft; 7. Output shaft; 8. First transmission component; 9. Second transmission component; 10. Third transmission component; 41. Drive gear; 42. Driven gear; 51. Gear shift wheel; 52. Transmission gear; 53. Engaging cylinder; 54. Lever assembly; 541. Lever ring; 542. Mounting block; 543. Lever; 544. Rotating shaft; 545. Handle; 546. Pin component; 547. Handle. Detailed Implementation

[0043] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0044] In the description of this utility model, 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 this utility model and 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 this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0045] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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 utility model based on the specific circumstances.

[0046] Fig. 1 This is a schematic diagram of the structure of a variable speed ratio horizontal rolling mill gearbox according to the present invention. Fig. 2 This is a schematic diagram of the lever assembly of a variable speed ratio horizontal rolling mill gearbox according to the present invention. Fig. 3 This is a schematic diagram of the pin component of a variable speed ratio horizontal rolling mill gearbox according to the present invention. Figs. 1-3 As shown, a preferred embodiment of a variable speed ratio horizontal rolling mill gearbox is illustrated, including a housing 1 and a drive shaft 3. An input shaft 2 and two output shafts 7 are rotatably mounted on the housing 1. The drive shaft 3 is rotatably mounted inside the housing 1 and is parallel to the input shaft 2. The drive shaft 3 is connected to the two output shafts 7 via a transmission assembly. The input shaft 2 is connected to the drive shaft 3 via a gear transmission structure, and the transmission ratio of the gear transmission structure is adjustable.

[0047] In this embodiment, the gear ratio of the gear transmission structure is adjusted to achieve the gearbox shifting effect, which meets the power requirements of various rolling conditions. It is not only highly applicable and efficient, but also reduces production input costs and improves product production stability.

[0048] Furthermore, as a preferred embodiment, the gear transmission structure includes: two gear sets 4 with different transmission ratios and a shifting mechanism 5. Each gear set 4 includes a driving gear 41 and a driven gear 42. The driving gear 41 is coaxially mounted on the input shaft 2, and the driven gear 42 is rotatably sleeved on the outside of the transmission shaft 3. The shifting mechanism 5 is located between the two driven gears 42 and the transmission shaft 3, and can operably connect one of the driven gears 42 to the transmission shaft 3.

[0049] Furthermore, in a preferred embodiment, the shifting mechanism 5 includes: two gear wheels 51, a transmission gear 52, a coupling cylinder 53, and a lever 543 assembly 54. The two gear wheels 51 are coaxially connected to the opposite end faces of the two driven gears 42, and each gear wheel 51 has a first external spline on its exterior. The transmission gear 52 is coaxially connected to the exterior of the transmission shaft 3 and is located between the two gear wheels 51. The transmission gear 52 has a second external spline on its exterior. The inner wall of the coupling cylinder 53 has an internal spline, and the coupling cylinder 53 is slidably sleeved on the exterior of the transmission gear 52. The internal spline and the second external spline are always engaged. The lever assembly is drivenly connected to the coupling cylinder 53 and is used to move the coupling cylinder 53 to slide axially so that the internal spline engages with one of the first external splines.

[0050] Even better, the two gearboxes 51 are integrated with the two driven gears 42.

[0051] In this embodiment, the gearbox has three gear positions, two of which are working gear positions and the other is neutral gear position. When the internal spline on the engagement cylinder 53 is only engaged with the second external spline on the transmission gear 52, the gearbox is in neutral gear position. When the engagement cylinder 53 slides axially and engages with the second external spline, and simultaneously engages with the first external spline on one of the gearbox gears 51, the gearbox is in a working gear position with a certain output speed. When the engagement cylinder 53 slides axially and engages with the second external spline, and simultaneously engages with the first external spline on another gearbox gear 51, the gearbox is in a working gear position with a different output speed.

[0052] Furthermore, as a preferred embodiment, the lever 543 assembly 54 includes a lever ring 541, at least one mounting block 542, a rotating shaft 544, at least one lever 543, and a handle 545. The outer ring of the engagement cylinder 53 is provided with a limiting groove. The lever ring 541 is coaxially disposed in the limiting groove. The mounting block 542 is rotatably disposed outside the lever ring 541. The rotating shaft 544 is installed inside the housing 1. One end of the lever 543 is connected to the outer wall of the rotating shaft 544, and the other end is axially slidably mounted on the mounting block 542. One end of the handle 545 is connected to one end of the rotating shaft 544. By moving the handle 545, the rotating shaft 544 is rotated, thereby causing the engagement cylinder to slide axially.

[0053] In this embodiment, when switching the gearbox speed ratio, the handle 545 is rotated, which drives the rotating shaft 544 to rotate. The rotating shaft 544 drives the lever 543 to rotate axially around the rotating shaft 544. Since the mounting block 542 and the dial ring 541 are rotatably connected, and the lever 543 and the mounting block 542 are slidably connected, the lever 543 rotates while driving the dial ring 541 to drive the engaging cylinder 53 to move axially, thereby realizing the adjustment of the equipment speed ratio. The operation is convenient.

[0054] Furthermore, as a preferred embodiment, the transmission ratio of each gear set 4 is greater than one.

[0055] Furthermore, in a preferred embodiment, the transmission assembly includes an intermediate shaft 6, a first transmission member 8, a second transmission member 9, and a third transmission member 10. The intermediate shaft 6 is arranged parallel to the transmission shaft 3 and is driven within the housing 1. The first transmission member 8 is driven between the transmission shaft 3 and the intermediate shaft 6. The second transmission member 9 is driven between the intermediate shaft 6 and one of the output shafts 7. The third transmission member 10 is driven between the two output shafts 7.

[0056] Furthermore, in a preferred embodiment, the first transmission member 8 and the second transmission member 9 are both gear sets with a transmission ratio greater than one, and the third transmission member 10 is a gear set with a transmission ratio equal to one.

[0057] Even better, the first transmission component 8, the second transmission component 9, and the third transmission component 10 can all be spur gear sets or helical gear sets.

[0058] Furthermore, in a preferred embodiment, one output shaft 7 is a long shaft and the other output shaft 7 is a short shaft, and the input shaft 2, transmission shaft 3, intermediate shaft 6, long shaft and short shaft are arranged in sequence; wherein, the second transmission member 9 is driven between the intermediate shaft 6 and the long shaft, and the third transmission member 10 is driven between the long shaft and the short shaft.

[0059] Furthermore, as a preferred embodiment, the lever 543 assembly 54 also includes a pin member 546, which is disposed between the handle 545 and the housing 1 for locking the position of the handle 545.

[0060] More preferably, the pin mechanism includes a positioning pin, and the handle 545 has a first positioning hole (not shown in the figure). The outer side of the housing 1 is provided with a low-position hole (not shown in the figure), a neutral hole (not shown in the figure), and a high-position hole (not shown in the figure) arranged sequentially along the rotation path of the lever 543. One end of the pin passes through the first positioning hole and engages with the low-position hole / neutral hole / high-position hole to lock the position of the engaging cylinder 53.

[0061] Furthermore, as a preferred embodiment, the other end of the handle 545 has a handle 547.

[0062] The above description is only a preferred embodiment of the present utility model and does not limit the implementation method and protection scope of the present utility model. Those skilled in the art should realize that all solutions obtained by equivalent substitutions and obvious changes made based on the description and illustrations of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A variable speed ratio horizontal rolling mill gearbox, characterized in that, include: A chassis on which parallel input shafts and two output shafts are rotatably mounted; A drive shaft is rotatably mounted inside the housing and parallel to the input shaft. The drive shaft is connected to the two output shafts via a transmission assembly. The input shaft is connected to the drive shaft via a gear transmission structure, and the transmission ratio of the gear transmission structure is adjustable.

2. The variable speed ratio horizontal rolling mill gearbox according to claim 1, characterized in that, The gear transmission structure includes: two gear sets with different transmission ratios and a shifting mechanism. Each gear set includes a driving gear and a driven gear. The driving gear is coaxially mounted on the input shaft, and the driven gear is rotatably sleeved on the outside of the transmission shaft. The shifting mechanism is located between the two driven gears and the transmission shaft, and can operably connect one of the driven gears to the transmission shaft.

3. The variable speed ratio horizontal rolling mill gearbox according to claim 2, characterized in that, The shifting mechanism includes: Two gear shifters are coaxially connected to the opposite end faces of the two driven gears, and each gear shifter has a first external spline on its exterior. A transmission gear, which is coaxially connected to the outside of the transmission shaft and located between the two gearboxes, has a second external spline on its exterior. A coupling sleeve, the inner wall of which has an internal spline, and the coupling sleeve is slidably sleeved on the outside of the transmission gear, and the internal spline is always engaged with the second external spline; A lever assembly is drivenly connected to the engagement cylinder and is used to move the engagement cylinder to slide axially so that the internal spline engages with one of the first external splines.

4. The variable speed ratio horizontal rolling mill gearbox according to claim 3, characterized in that, The lever assembly includes: The dial ring has a limiting groove on the outer ring of the connecting cylinder, and the dial ring is coaxially disposed in the limiting groove. At least one mounting block, said mounting block being rotatably disposed outside the dial ring; A rotating shaft, which is installed inside the chassis; At least one lever, one end of which is connected to the outer wall of the rotating shaft and the other end is axially slidably mounted on the mounting block; A handle, one end of which is connected to one end of the rotating shaft, is used to rotate the rotating shaft by turning the handle, thereby causing the connecting cylinder to slide axially.

5. The variable speed ratio horizontal rolling mill gearbox according to claim 2, characterized in that, The transmission ratio of each gear set is greater than one.

6. The variable speed ratio horizontal rolling mill gearbox according to claim 1, characterized in that, The transmission assembly includes: An intermediate shaft is arranged parallel to the drive shaft and is installed inside the chassis. A first transmission component is connected between the transmission shaft and the intermediate shaft. A second transmission component is drivingly connected between the intermediate shaft and one of the output shafts; The third transmission component is connected between the two output shafts.

7. The variable speed ratio horizontal rolling mill gearbox according to claim 6, characterized in that, The first transmission component and the second transmission component are both gear sets with a transmission ratio greater than one, and the third transmission component is a gear set with a transmission ratio equal to one.

8. The variable speed ratio horizontal rolling mill gearbox according to claim 6, characterized in that, One of the output shafts is a long shaft and the other output shaft is a short shaft, and the input shaft, the transmission shaft, the intermediate shaft, the long shaft and the short shaft are arranged in sequence; The second transmission component is driven between the intermediate shaft and the long shaft, and the third transmission component is driven between the long shaft and the short shaft.

9. The variable speed ratio horizontal rolling mill gearbox according to claim 4, characterized in that, The lever assembly also includes a pin component, which is disposed between the handle and the housing to lock the position of the handle.

10. The variable speed ratio horizontal rolling mill gearbox according to claim 4, characterized in that, The other end of the handle has a grip.

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