Double-speed heavy-duty gearbox structure

Abstract

The utility model discloses a double-speed heavy-load gearbox structure which comprises a box body, two output shafts and a driving shaft are rotatably installed on the box body, an intermediate shaft is rotatably installed in the box body, and the intermediate shaft is in transmission connection with the two output shafts through a transmission assembly. The speed reducer further comprises a middle sleeve, two driving cylinders, a joint sleeve and a shifting fork gear shifting mechanism, the middle sleeve is coaxially arranged outside the middle shaft in a sleeving mode, a first external spline is arranged outside the middle sleeve, and the two driving cylinders are movably arranged outside the middle shaft in a sleeving mode. Due to the fact that the two first gear sets with different transmission ratios are arranged, in the working process, the joint sleeve can be driven by the shifting fork gear shifting mechanism to move axially between the two driving cylinders, the whole structure has two speed ratios, the machining requirements of different product specifications are met, and applicability is high.

Description

Technical Field

[0001] The utility model relates to the technical field of gear boxes, in particular to a double-speed heavy-load gear box structure. Background Art

[0002] The traditional vertical rolling mill combined gearbox is generally equipped with a first-stage bevel gear and a two-stage parallel shaft cylindrical helical gear transmission device. An input bevel gear pair transmits the power vertically to the cylindrical gear pair, and then transmits it horizontally to the other output shaft through the differential cylindrical gear pair on one of the output shafts. That is, it is transmitted to the two output shafts through the differential cylindrical gear pair to drive the rolling mill to work. This structure has a unique speed ratio and the specifications of the processed products are limited. Summary of the invention

[0003] In view of the above problems existing in the existing vertical rolling mill combined gearbox, the present invention aims to provide a double-speed heavy-duty gearbox structure with high applicability and convenient adjustment.

[0004] The specific technical solutions are as follows:

[0005] A double-speed heavy-duty gearbox structure, comprising: a box body, on which two output shafts and a driving shaft are rotatably mounted, an intermediate shaft is rotatably mounted inside the box body, and the intermediate shaft is transmission-connected to the two output shafts via a transmission assembly;

[0006] Also includes:

[0007] An intermediate sleeve, the intermediate sleeve is coaxially sleeved on the outside of the intermediate shaft, and the outside of the intermediate sleeve has a first external spline;

[0008] Two driving cylinders, the two driving cylinders are movably sleeved on the outside of the intermediate shaft and are respectively located on both sides of the intermediate sleeve, each driving cylinder has a second external spline on the outside, and the driving shaft is connected to each driving cylinder through a first gear set, and the transmission ratios of the two first gear sets are different;

[0009] An engagement sleeve, wherein the engagement sleeve is sleeved on the outside of the intermediate sleeve, and the inner wall of the engagement sleeve has an internal spline that matches and engages with the first external spline;

[0010] A shift fork shift mechanism is drivingly connected to the engagement sleeve and is used to drive the engagement sleeve to move axially so that the internal spline is engaged with the first external spline and one of the second external splines.

[0011] Further, as a preferred embodiment, the shift fork shift mechanism includes:

[0012] A toggle ring, wherein the outer ring of the engagement sleeve is provided with a limiting groove, and the toggle ring is coaxially arranged in the limiting groove;

[0013] At least one mounting block, the mounting block being rotatably mounted outside the dial ring;

[0014] A rotating shaft, the rotating shaft is rotatably mounted in the box;

[0015] At least one lever, one end of which is connected to the outer wall of the rotating shaft and the other end of which is axially slidably mounted on the mounting block;

[0016] A handle, one end of which is connected to one end of the rotating shaft, is used to drive the rotating shaft to rotate so that the shifting rod rotates around the axial direction of the rotating shaft, thereby causing the coupling sleeve to move axially.

[0017] Furthermore, as a preferred embodiment, it also includes a latch mechanism, which is arranged between the handle and the box body and is used to lock the position of the handle to lock the position of the engagement sleeve.

[0018] Furthermore, as a preferred embodiment, the other end of the handle has a grip.

[0019] Furthermore, as a preferred embodiment, the transmission ratio of one of the first gear sets is equal to one, and the transmission ratio of another of the first gear sets is greater than one.

[0020] Further, as a preferred embodiment, the first gear set with a transmission ratio equal to one includes:

[0021] A first driving gear, wherein the first driving gear is sleeved on the outside of the driving shaft;

[0022] The first driven gear is movably sleeved on the outside of the intermediate shaft and is coaxially connected to one of the driving cylinders, and the first driven gear is meshed with the driving gear.

[0023] Further, as a preferred embodiment, the first gear set with a transmission ratio greater than one includes:

[0024] A second driving gear, which is sleeved on the outside of the driving shaft and is an integrated structure with the driving shaft;

[0025] The second driven gear is movably sleeved on the outside of the intermediate shaft and is coaxially connected with the other driving cylinder, and the second driven gear is meshed and connected with the second driving gear.

[0026] Further, as a preferred embodiment, the transmission assembly includes:

[0027] A transmission shaft, which is rotatably mounted in the housing, and is perpendicular to the intermediate shaft and parallel to the two output shafts;

[0028] a second gear set, the first gear set being transmission-connected between the transmission shaft and the intermediate shaft;

[0029] a third gear set, the third gear set being transmission-connected between the transmission shaft and one of the output shafts;

[0030] A fourth gear set is transmission-connected between the two output shafts.

[0031] Furthermore, as a preferred embodiment, the transmission ratio of the third gear set is greater than 1.

[0032] Further, as a preferred embodiment, the fourth gear set includes:

[0033] Two transmission gears are respectively sleeved on the outside of the two output shafts and are respectively integrated with the two output shafts.

[0034] Compared with the prior art, the above technical solution has the following positive effects:

[0035] (1) In the utility model, two first gear sets with different transmission ratios are provided. When working, the coupling sleeve can be driven to move axially between the two driving cylinders through the shift fork shift mechanism, so that the overall structure has two speed ratios, which can meet the processing requirements of different product specifications and has high applicability.

[0036] (2) In this embodiment, when the speed ratio of the equipment is switched, the handle is turned, the handle drives the rotating shaft to rotate, and the rotating shaft drives the shift lever to rotate axially around the rotating shaft. Since the mounting block and the coupling sleeve are connected by rotation, and the shift lever and the mounting block are connected by sliding, when the shift lever rotates, it will drive the coupling sleeve to move axially, thereby realizing the adjustment of the equipment speed ratio, which is easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 This is a schematic diagram of the structure of a double-speed heavy-duty gearbox structure of the utility model;

[0038] Figure 2 It is a structural schematic diagram of a shift fork shift mechanism of a double-speed heavy-duty gearbox structure of the utility model;

[0039] In the accompanying drawings: 1, housing; 2, driving shaft; 3, intermediate shaft; 4, transmission shaft; 5, output shaft; 6, intermediate sleeve; 7, driving cylinder; 8, coupling sleeve; 9, shift fork shift mechanism; 10, first gear set; 20, second gear set; 30, third gear set; 40, fourth gear set; 91, mounting block; 92, shift lever; 93, rotating shaft; 94, handle; 95, latch mechanism; 101, first driving gear; 102, first driven gear; 103, second driven gear; 104, second driving gear; 401, transmission gear; DETAILED DESCRIPTION

[0040] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0041] In the description of the present invention, it should be noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, if the terms "first", "second", "third" appear, they are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0042] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] Figure 1 This is a schematic diagram of a double-speed heavy-duty gearbox structure of the utility model. Figure 2 The schematic diagram of the structure of the shift fork shift mechanism of the double-speed heavy-duty gearbox structure of the utility model is as follows: Figure 1-2As shown, a preferred embodiment of a double-speed heavy-duty gearbox structure is shown, comprising: a housing 1, two output shafts 5 and a drive shaft 2 are rotatably mounted on the housing 1, an intermediate shaft 3 is rotatably mounted inside the housing 1, and the intermediate shaft 3 is connected to the two output shafts 5 through a transmission assembly; it also includes an intermediate sleeve 6, two drive cylinders 7, a coupling sleeve 8 and a shift fork shift mechanism 9, the intermediate sleeve 6 is coaxially sleeved on the outside of the intermediate shaft 3, the outside of the intermediate sleeve 6 has a first external spline (not shown in the figure), and the two drive cylinders 7 are movably sleeved on the outside of the intermediate shaft 3, And are respectively located on both sides of the intermediate sleeve 6, the outside of each driving cylinder 7 has a second external spline (not shown in the figure), and the driving shaft 2 is connected to each driving cylinder 7 through a first gear set 10, and the transmission ratios of the two first gear sets 10 are different. The coupling sleeve 8 is sleeved on the outside of the intermediate sleeve 6, and the inner wall of the coupling sleeve 8 has an internal spline (not shown in the figure) that matches and engages with the first external spline. The fork shift mechanism 9 is connected to the coupling sleeve 8 for driving the coupling sleeve 8 to move axially so that the internal spline engages with the first external spline or one of the second external splines.

[0044] In this embodiment, the driving shaft 2 is respectively connected to the two driving cylinders 7 through two sets of first gear sets 10. During operation, the shift fork mechanism 9 drives the coupling sleeve 8 to move axially. While the inner spline is meshing with the first outer spline, the coupling sleeve 8 can move between the two driving cylinders 7 through the axial movement, thereby achieving the meshing of the inner spline with any one of the second outer splines, and then the driving shaft 2 drives the intermediate shaft 3 to rotate through one of the first gear sets 10, and the intermediate shaft 3 drives the two output shafts 5 to rotate through the transmission assembly.

[0045] In this embodiment, two first gear sets 10 with different transmission ratios are provided. During operation, the coupling sleeve 8 can be driven to move axially between the two driving cylinders 7 through the fork shift mechanism 9, so that the overall structure has two speed ratios, which meets the processing requirements of different product specifications and has high applicability.

[0046] Furthermore, as a preferred embodiment, the shift fork shift mechanism 9 includes a shift ring 96, at least one mounting block 91, a rotating shaft 93, at least one shift rod 92 and a handle 94. The outer ring of the coupling sleeve 8 is provided with a limit groove. The shift ring 96 is coaxially arranged in the limit groove 81. The mounting block 91 is rotatably installed on the outside of the shift ring 96. The rotating shaft 93 is rotatably installed in the housing 1. One end of the shift rod 92 is connected to the outer wall of the rotating shaft 93, and the other end can be axially slidably installed on the mounting block 91. One end of the handle 94 is connected to one end of the rotating shaft 93, and is used to drive the rotating shaft 93 to rotate, so that the shift rod 92 rotates around the axial direction of the rotating shaft 93, thereby causing the coupling sleeve 8 to move axially.

[0047] In this embodiment, when the speed ratio of the equipment is switched, the handle 94 is rotated, the handle 94 drives the rotating shaft 93 to rotate, and the rotating shaft 93 drives the lever 92 to rotate axially around the rotating shaft 93. Since the mounting block 91 and the shifting ring 96 are connected by rotation, and the shifting ring 92 and the mounting block 91 are connected by sliding, when the shifting ring 92 rotates, it will drive the shifting ring to drive the coupling sleeve 8 to move axially, thereby realizing the adjustment of the equipment speed ratio, and the operation is convenient.

[0048] Furthermore, as a preferred embodiment, it also includes a latch mechanism 95, which is arranged between the handle 94 and the box body 1 and is used to lock the position of the handle 94 to lock the position of the coupling sleeve 8.

[0049] More preferably, the latch mechanism 95 includes a positioning latch, a first positioning hole (not shown in the figure) is provided on the handle 94, and a low-gear hole (not shown in the figure), a neutral hole (not shown in the figure), and a high-gear hole (not shown in the figure) are sequentially arranged in the rotation path of the external lever 92 of the housing 1, and one end of the latch passes through the first positioning hole and is positioned and matched with the low-gear hole / neutral hole / high-gear hole to lock the position of the coupling sleeve 8.

[0050] Specifically, when the latch is positioned with the low-gear hole, the inner spline of the coupling sleeve 8 meshes with the first outer spline and the second outer spline on the drive cylinder 7 which is connected to the first gear set 10 with a relatively large transmission; when the latch is positioned with the neutral hole, the inner spline only meshes with the first outer spline; when the latch is positioned with the high-gear hole, the inner spline of the coupling sleeve 8 meshes with the first outer spline and the second outer spline on the drive cylinder 7 which is connected to the first gear set 10 with a relatively small transmission.

[0051] Further, as a preferred embodiment, the other end of the handle 94 has a grip.

[0052] Furthermore, as a preferred embodiment, the transmission ratio of one first gear set 10 is equal to one, and the transmission ratio of another first gear set 10 is greater than one.

[0053] More preferably, the first gear set 10 is a helical gear set or a spur gear set.

[0054] Furthermore, as a preferred embodiment, the first gear set 10 with a transmission ratio equal to one includes a first driving gear 101 and a first driven gear 102, the first driving gear 101 is sleeved on the outside of the driving shaft 2, the first driven gear 102 is movably sleeved on the outside of the intermediate shaft 3, and is coaxially connected to one of the driving cylinders 7, and the first driven gear 102 is meshed with the driving gear.

[0055] Furthermore, as a preferred embodiment, the first gear set 10 with a transmission ratio greater than one includes a second driving gear 104 and a second driven gear 103, the second driving gear 104 is sleeved on the outside of the driving shaft 2 and is an integrated structure with the driving shaft 2, the second driven gear 103 is movably sleeved on the outside of the intermediate shaft and is coaxially connected to another driving cylinder 7, and the second driven gear 103 is meshingly connected to the second driving gear 104.

[0056] Further, as a preferred embodiment, the transmission assembly includes a transmission shaft 4, a second gear set 20, a third gear set 30 and a fourth gear set 40. The transmission shaft 4 is rotatably installed in the housing 1, and the transmission shaft 4 is perpendicular to the intermediate shaft 3 and parallel to the two output shafts 5. The first gear set 10 is transmission-connected between the transmission shaft 4 and the intermediate shaft 3, the third gear set 30 is transmission-connected between the transmission shaft 4 and one of the output shafts 5, and the fourth gear set 40 is transmission-connected between the two output shafts 5.

[0057] More preferably, the second gear set 20 is a bevel gear set, and the third gear set 30 and the fourth gear set 40 are spur gear sets or helical gear sets.

[0058] Further, as a preferred embodiment, the transmission ratio of the third gear set 30 is greater than 1.

[0059] Furthermore, as a preferred embodiment, the fourth gear set 40 includes two transmission gears 401 . The two transmission gears 401 are respectively sleeved on the outside of the two output shafts 5 and are respectively integrated with the two output shafts 5 .

[0060] The above description is only a preferred embodiment of the present invention, and does not limit the implementation mode and protection scope of the present invention. For those skilled in the art, it should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A double-speed heavy-duty gearbox structure, characterized in that: include: A box body, on which two output shafts and a driving shaft are rotatably mounted, an intermediate shaft is rotatably mounted inside the box body, and the intermediate shaft is transmission-connected to the two output shafts via a transmission assembly; Also includes: An intermediate sleeve, the intermediate sleeve is coaxially sleeved on the outside of the intermediate shaft, and the outside of the intermediate sleeve has a first external spline; Two driving cylinders, the two driving cylinders are movably sleeved on the outside of the intermediate shaft and are respectively located on both sides of the intermediate sleeve, each driving cylinder has a second external spline on the outside, and the driving shaft is connected to each driving cylinder through a first gear set, and the transmission ratios of the two first gear sets are different; An engagement sleeve, wherein the engagement sleeve is sleeved on the outside of the intermediate sleeve, and the inner wall of the engagement sleeve has an internal spline that matches and engages with the first external spline; A shift fork shift mechanism is drivingly connected to the engagement sleeve and is used to drive the engagement sleeve to move axially so that the internal spline is engaged with the first external spline and one of the second external splines.

2. The double-speed heavy-duty gearbox structure according to claim 1 is characterized in that: The shift fork shift mechanism comprises: A toggle ring, wherein the outer ring of the engagement sleeve is provided with a limiting groove, and the toggle ring is coaxially arranged in the limiting groove; At least one mounting block, the mounting block being rotatably mounted outside the dial ring; A rotating shaft, the rotating shaft is rotatably mounted in the box; At least one lever, one end of which is connected to the outer wall of the rotating shaft and the other end of which 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 drive the rotating shaft to rotate so that the shifting rod rotates around the axial direction of the rotating shaft, thereby causing the coupling sleeve to move axially.

3. The double-speed heavy-duty gearbox structure according to claim 2 is characterized in that: It also includes a latch mechanism, which is arranged between the handle and the box body and is used to lock the position of the handle to lock the position of the engagement sleeve.

4. The double-speed heavy-duty gearbox structure according to claim 2 is characterized in that: The other end of the handle is provided with a grip.

5. The double-speed heavy-duty gearbox structure according to claim 1 is characterized in that: The transmission ratio of one of the first gear sets is equal to one, and the transmission ratio of another of the first gear sets is greater than one.

6. The double-speed heavy-duty gearbox structure according to claim 5, characterized in that: The first gear set having a transmission ratio equal to one comprises: A first driving gear, wherein the first driving gear is sleeved on the outside of the driving shaft; The first driven gear is movably sleeved on the outside of the intermediate shaft and is coaxially connected to one of the driving cylinders, and the first driven gear is meshed with the driving gear.

7. The double-speed heavy-duty gearbox structure according to claim 6, characterized in that: The first gear set having a transmission ratio greater than one comprises: A second driving gear, which is sleeved on the outside of the driving shaft and is an integrated structure with the driving shaft; The second driven gear is movably sleeved on the outside of the intermediate shaft and is coaxially connected with the other driving cylinder, and the second driven gear is meshed and connected with the second driving gear.

8. The double-speed heavy-duty gearbox structure according to claim 1, characterized in that: The transmission assembly comprises: A transmission shaft, which is rotatably mounted in the housing, and is perpendicular to the intermediate shaft and parallel to the two output shafts; a second gear set, the first gear set being transmission-connected between the transmission shaft and the intermediate shaft; a third gear set, the third gear set being transmission-connected between the transmission shaft and one of the output shafts; A fourth gear set is transmission-connected between the two output shafts.

9. The double-speed heavy-duty gearbox structure according to claim 8, characterized in that: The transmission ratio of the third gear set is greater than 1.

10. The double-speed heavy-duty gearbox structure according to claim 8, characterized in that: The fourth gear set comprises: Two transmission gears are respectively sleeved on the outside of the two output shafts and are respectively integrated with the two output shafts.

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