An interlocking shift rolling mill gearbox

Abstract

The present invention discloses an interlocking shift rolling mill gearbox, comprising a gearbox reduction mechanism and a shift mechanism, wherein the shift mechanism comprises a T-shaped rocker, wherein the gearbox reduction mechanism comprises a first spline sleeve and a second spline sleeve, wherein the T-shaped rocker is connected to the first spline sleeve and the second spline sleeve respectively, and wherein the swing of the T-shaped rocker drives the first spline sleeve and the second spline sleeve to move in opposite directions to shift gears, so that the first clutch and the second clutch form an interlocking state of two opposite states of separation and engagement. The beneficial effect of the present invention is that the shift mechanism is formed by a connecting rod mechanism provided with a T-shaped rocker, and when the T-shaped rocker swings, it drives the first spline sleeve and the second spline sleeve to move, and the movement directions of the first spline sleeve and the second spline sleeve are opposite, that is, through any of the above spline sleeves, one of the transmission paths of two different output torques in the gearbox is connected and the other is cut off, thereby achieving lock and shift, and improving the torque that the shift mechanism can withstand, so as to adapt to applications in high power and heavy loads.

Description

Technical Field

[0001] The invention relates to a gear shifting structure, in particular to an interlocking gear shifting rolling mill gear box. Background Art

[0002] Shift mechanisms are widely used in multi-speed gearboxes to achieve matching of different speeds and torques. Existing shift fork shift mechanisms typically have a fixed, two-shaft structure. The first shaft is a solid shaft with two gears fixedly connected to it, while the second shaft is equipped with two shift gears with bearings inside their bores. The shift fork moves the shift spline sleeve, which moves the shift spline sleeve to connect the different shift gears to the shaft, thereby achieving different gear shifts.

[0003] The torque that the existing shift fork shift mechanism can withstand is relatively small, resulting in the shift fork shift mechanism being prone to failure in high-power and heavy-load applications, such as in the field of metallurgical rolling. The existing shift fork shift mechanism is mostly used in reducers for auxiliary processes such as uncoiling and coiling, and in high-power wide and thick plate roughing and finishing processes, where the loads are huge, and in environments with harsh vibration and shock. Summary of the Invention

[0004] The purpose of the present invention is to provide an interlocking shift rolling mill gearbox to increase the torque that the shift mechanism can withstand so as to adapt to applications in high power and heavy loads.

[0005] To achieve the above objectives, the present invention adopts the following technical solutions.

[0006] An interlocking shifting rolling mill gearbox includes a gearbox reduction mechanism and a shifting mechanism, the shifting mechanism includes a T-shaped rocker, the gearbox reduction mechanism includes a first clutch and a second clutch for shifting, the first clutch and the second clutch are respectively provided with a first spline sleeve and a second spline sleeve; the T-shaped rocker is respectively connected to the first spline sleeve and the second spline sleeve, and the swing of the T-shaped rocker drives the first spline sleeve and the second spline sleeve to move in opposite directions, so that the first clutch and the second clutch form an interlocking state of two opposite states of separation and combination.

[0007] The present invention adopts the above-mentioned technical solution, by setting up a shift mechanism formed by a connecting rod mechanism, and setting a T-shaped rocker in the shift mechanism, so that the T-shaped rocker is connected to the first spline sleeve and the second spline sleeve respectively, and when the shift mechanism is running, the T-shaped rocker is driven to swing, and the first spline sleeve and the second spline sleeve are driven to move during the swing, and the movement directions of the first spline sleeve and the second spline sleeve are opposite, that is, through any of the above-mentioned spline sleeves, one of the transmission paths of two different output torques in the gearbox is connected and the other is cut off, and the first clutch and the second clutch form an interlocking of two opposite states of separation and combination, realizing lock and shifting, replacing the existing fork shifting structure, and improving the torque that the shift mechanism can withstand to adapt to applications in high-power and heavy-load environments and harsh environments of vibration and impact, and simplifying the shifting structure, reducing production costs and installation difficulty.

[0008] Preferably, the shift mechanism also includes a cylinder, a first rocker, a second rocker, a connecting rod, a piston rod and a shift shaft. The cylinder is fixedly connected to the gear box, the free end of the piston rod of the cylinder is hinged to one end of the first rocker, the other end of the first rocker is fixedly connected to the shift shaft, a second rocker is fixedly connected to the shift shaft, the other end of the second rocker is hinged to the connecting rod, and the other end of the connecting rod is hinged to the T-shaped rocker.

[0009] By setting up an oil cylinder, the piston rod of the oil cylinder is extended and retracted to drive the first rocker arm hinged to it to swing, the first rocker arm drives the shift shaft connected to it to swing, the swing of the shift shaft drives the second rocker arm connected to it to swing, and the T-shaped rocker arm is swung through the connecting rod to form a transmission pair, and the transmission pair drives the movement of the first spline sleeve and the second spline sleeve.

[0010] Preferably, the T-shaped rocker is composed of a shift execution rod section and a shift power input rod section that are perpendicular to each other and fixedly connected into one; the two connection points of the first spline sleeve and the second spline sleeve with the T-shaped rocker are located at the two ends of the shift execution rod section, and the swing center of the T-shaped rocker is located in the middle of the shift execution rod section; the hinge point with the connecting rod is located at the far end of the shift power input rod section.

[0011] By locating the swing center of the T-shaped rocker in the middle of the shift execution rod segment, it is convenient to drive the shift execution rod segment to swing through the input rod segment, thereby driving the spline sleeve.

[0012] Preferably, two second rockers are fixedly connected to the shift shaft, and the two second rockers are respectively hinged to a corresponding T-rocker through the connecting rod. The same T-rocker is located on the same side of the first spline sleeve and the second spline sleeve, and the two T-rockers are symmetrically arranged relative to the same spline sleeve.

[0013] By fixing two second rockers on the shift shaft, the two connection points of one T-shaped rocker are located on the same side of the first spline sleeve and the second spline sleeve, and the two hinge points of the other T-shaped rocker are located on the other same side of the first spline sleeve and the second spline sleeve, and the two connection points on the same spline sleeve are symmetrical, so that the spline sleeve is subjected to balanced force under the action of the T-shaped rocker, which facilitates smooth movement of the spline sleeve.

[0014] Preferably, an annular groove is formed on both the first spline sleeve and the second spline sleeve; the distal end of the shift execution rod section of the T-shaped rocker is connected to a roller via a roller shaft; and the roller is in rolling connection with the annular groove.

[0015] By forming an annular groove for mounting a roller on the spline sleeve, the spline sleeve is conveniently connected to the T-shaped rocker through the roller.

[0016] Preferably, a stepped hole is formed on the roller, a frustum is formed at one end of the roller shaft, the roller shaft is connected to the roller by the frustum cooperating with the stepped hole, a thread is formed at the other end of the roller shaft, a nut is connected to the thread, the T-shaped rocker forms an axis hole with the roller shaft, and the T-shaped rocker is located in the middle of the roller shaft.

[0017] By connecting the frustum of the roller shaft with the stepped hole of the roller, the roller shaft can be rotated in the sliding body to fit the position of the T-shaped rocker, and the two can be prevented from falling off during rotation. A nut is also connected to the other end of the roller shaft to prevent the T-shaped rocker from falling off from the spline sleeve.

[0018] Preferably, a threaded hole is formed in the middle of the roller shaft, a step hole is formed on the connecting portion of the T-shaped rocker, and a locking screw passes through the step hole and is screwed into the threaded hole to connect the T-shaped rocker to the roller shaft.

[0019] By forming a threaded hole on the roller shaft and connecting the T-shaped rocker to the roller shaft through a bolt, the T-shaped rocker is further prevented from falling off the roller shaft, thereby ensuring the firm strength of the connection.

[0020] Preferably, the gearbox reduction mechanism also includes an input shaft, a transmission shaft, a first output shaft and a second output shaft. The first output shaft and the second output shaft are constantly meshed through gear transmission. The input shaft and the first output shaft are coaxial, and the first clutch based on the first spline sleeve is provided between the two. The transmission shaft and the input shaft are constantly meshed through gear transmission. The transmission shaft and the second output shaft are coaxial, and the second clutch based on the second spline sleeve is provided between the two.

[0021] When the T-shaped rocker drives the spline sleeve to move toward the first output shaft, the input shaft and the first output shaft are connected, and the torque is transmitted to the first output shaft. The gear on the first output shaft is then engaged with the gear on the second output shaft, so that the torque and speed of the second output shaft and the first output shaft are output to the roller in a ratio of 1 to 1, thereby rolling the metal blank; the gear on the transmission shaft and the gear on the input shaft form a reduction stage, which plays a role of reducing speed and increasing torque. When the T-shaped rocker drives the second spline sleeve to move toward the second output shaft, the transmission shaft and the second output shaft are connected to transmit torque, so that the torque and speed of the second output shaft and the first output shaft are output to the roller in a ratio of 1 to 1, thereby rolling the metal blank.

[0022] Preferably, the first clutch also includes a first spline that cooperates with the first spline sleeve, and the first spline is respectively formed on the outer peripheries of the opposite ends of the input shaft and the first output shaft; the second clutch also includes a second spline that cooperates with the second spline sleeve, and the second spline is respectively formed on the outer peripheries of the opposite ends of the transmission shaft and the second output shaft.

[0023] First splines are evenly distributed on the outer circumferences of the facing ends of the input shaft and the first output shaft, and cooperate with the first spline sleeve to form a clutch; second splines are evenly distributed on the outer circumferences of the facing ends of the transmission shaft and the second output shaft, and cooperate with the second spline sleeve to form a clutch.

[0024] The beneficial effect of the invention is that by setting a shift mechanism formed by a connecting rod mechanism and setting a T-shaped rocker in the shift mechanism, the T-shaped rocker is connected to the first spline sleeve and the second spline sleeve respectively. When the shift mechanism is running, the T-shaped rocker is driven to swing, and the first spline sleeve and the second spline sleeve are driven to move during the swing, and the movement directions of the first spline sleeve and the second spline sleeve are opposite. That is, through any of the above-mentioned spline sleeves, the two transmission paths of different output torques in the gearbox are connected, one and the other is cut off, thereby realizing lock and gear shifting, replacing the existing shift fork shift mechanism structure, improving the torque that the shift mechanism can withstand, so as to adapt to applications in high power and heavy loads, and simplifying the shift structure, reducing production costs and installation difficulty. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural diagram of the present invention;

[0026] Figure 2 The present invention Figure 1 The cross-sectional view of AA in FIG;

[0027] Figure 3 It is a structural diagram of part of the gear shift mechanism;

[0028] Figure 4 It is a partial structural diagram of the present invention;

[0029] Figure 5 It is a simplified diagram of the shift mechanism of the present invention. DETAILED DESCRIPTION

[0030] The present invention will be further described below with reference to the accompanying drawings, but the present invention is not limited to the scope of the embodiments described.

[0031] The figure marks in the drawings of the specification include: second rocker 12, T-rocker 11, connecting rod 13, cylinder 14, piston rod 141, first rocker 15, shift shaft 16, input shaft 2, transmission shaft 21, second output shaft 22, first output shaft 23, first spline 3, first spline sleeve 32, second spline 41, second spline sleeve 42, annular groove 5, roller 6, roller shaft 7, nut 71.

[0032] See also Figures 1 to 5 , an interlocking shifting rolling mill gearbox, including a gearbox reduction mechanism and a shifting mechanism, the shifting mechanism including a T-shaped rocker 11, the gearbox reduction mechanism including a first clutch and a second clutch for shifting, the first clutch and the second clutch are respectively provided with a first spline sleeve 32 and a second spline sleeve 42; the T-shaped rocker 11 is respectively connected to the first spline sleeve 32 and the second spline sleeve 42, and the swing of the T-shaped rocker 11 drives the first spline sleeve 32 and the second spline sleeve 42 to move in opposite directions, so that the first clutch and the second clutch form an interlocking of two opposite states of separation and combination.

[0033] Among them, see Figure 4 and Figure 5 The shift mechanism also includes a cylinder 14, a first rocker 15, a second rocker 12, a connecting rod 13, a piston rod 141 and a shift shaft 16. The cylinder 14 is fixedly connected to the gear box. The free end of the piston rod 141 of the cylinder 14 is hinged to one end of the first rocker 15. The other end of the first rocker 15 is fixedly connected to the shift shaft 16. The second rocker 12 is fixedly connected to the shift shaft 16. The other end of the second rocker 12 is hinged to the connecting rod 13. The other end of the connecting rod 13 is hinged to the T-shaped rocker 11.

[0034] See also Figure 4 and Figure 5The T-shaped rocker 11 consists of a shift actuator segment and a shift power input segment, which are perpendicular and fixedly connected to each other. The first and second splined sleeves 32, 42 connect to the T-shaped rocker 11 at two ends of the shift actuator segment, with the swing center of the T-shaped rocker 11 located in the middle of the shift actuator segment. The hinge point with the connecting rod 13 is located at the distal end of the shift power input segment. Two second rockers 12 are fixedly connected to the shift shaft 16. Each second rocker 12 is hinged to a corresponding T-shaped rocker 11 via the connecting rod 13. The two hinge points of each T-shaped rocker 11 are located on the same side of the first and second splined sleeves 32, 42. The two T-shaped rockers 11 are symmetrically arranged with respect to the same spline sleeve.

[0035] See also Figure 2 , an annular groove 5 is formed on both the first spline sleeve 32 and the second spline sleeve 42; the distal end of the shift execution rod section of the T-shaped rocker 11 is connected to a roller 6 through a roller shaft 7; the roller 6 is in rolling connection with the annular groove 5.

[0036] See also Figure 2 A stepped hole is formed on the roller 6, and a frustum is formed at one end of the roller shaft 7. The roller shaft 7 is connected to the roller 6 by cooperating with the frustum and the stepped hole. A thread is formed on the other end of the roller shaft 7, and a nut 71 is connected to the thread. The T-shaped rocker 11 forms an axis hole with the roller shaft 7 and is located in the middle of the roller shaft 7.

[0037] See also Figure 2 and Figure 4 A threaded hole is formed in the middle of the roller shaft 7, and a step hole is formed on the connecting portion of the T-shaped rocker 11. A locking screw passes through the step hole and is screwed into the threaded hole to lock the T-shaped rocker 11 on the roller shaft 7.

[0038] See also Figure 1 The gearbox reduction mechanism also includes an input shaft 2, a transmission shaft 21, a first output shaft 23 and a second output shaft 22. The first output shaft 23 and the second output shaft 22 are constantly meshed through gear transmission. The input shaft 2 and the first output shaft 23 are coaxial, and the first clutch based on the first spline sleeve 32 is provided between the two; the transmission shaft 21 is constantly meshed with the input shaft 2 through gear transmission, the transmission shaft 21 and the second output shaft 22 are coaxial, and the second clutch based on the second spline sleeve 42 is provided between the two.

[0039] See also Figure 1The first clutch also includes a first spline 3 that cooperates with the first spline sleeve 32, and the first spline 3 is respectively formed on the outer periphery of the opposite ends of the input shaft 2 and the first output shaft 23; the second clutch also includes a second spline 41 that cooperates with the second spline sleeve 42, and the second spline 41 is respectively formed on the outer periphery of the opposite ends of the transmission shaft 21 and the second output shaft 22.

[0040] When working, see Figure 1 The operation of the oil cylinder 14 drives the shift mechanism. The T-shaped rocker 11 swings leftward, causing the first splined sleeve 32 to move leftward, connecting the input shaft 2 with the first output shaft 23. Simultaneously, the second splined sleeve 42 moves rightward, disconnecting the transmission shaft 21 from the second output shaft 22. The gear on the first output shaft 23 meshes with the gear on the second output shaft 22, and the torque and speed of the second output shaft 22 and the first output shaft 23 are output in a 1:1 ratio. When the T-shaped rocker 11 swings rightward, the first splined sleeve 32 moves rightward, disconnecting the input shaft 2 from the first output shaft 23. Simultaneously, the second splined sleeve 42 moves leftward, connecting the transmission shaft 21 and the second output shaft 22. The input shaft 2 and the rotating shaft 21 are decelerated through gear meshing. The transmission shaft 21 then transmits torque to the second output shaft 22. The gear on the second output shaft 22 meshes with the gear on the first output shaft 23, and the torque and speed of the second output shaft 22 and the first output shaft 23 are output in a 1:1 ratio, thus achieving the shift.

[0041] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. An interlocking shift rolling mill gearbox, characterized in that: The invention comprises a gearbox reduction mechanism and a shifting mechanism, wherein the shifting mechanism comprises a T-shaped rocker (11), and the gearbox reduction mechanism comprises a first clutch and a second clutch for shifting, wherein the first clutch and the second clutch are respectively provided with a first spline sleeve (32) and a second spline sleeve (42); the T-shaped rocker (11) is respectively connected to the first spline sleeve (32) and the second spline sleeve (42); the T-shaped rocker (11) swings to drive the first spline sleeve (32) and the second spline sleeve (42) to move in opposite directions, so that the first clutch and the second clutch form an interlocking state of two opposite states of separation and combination; The shift mechanism further comprises an oil cylinder (14), a first rocking arm (15), a second rocking arm (12), a connecting rod (13), a piston rod (141) and a shift shaft (16), wherein the oil cylinder (14) is fixedly connected to the gear box, a free end of the piston rod (141) of the oil cylinder (14) is hinged to one end of the first rocking arm (15), the other end of the first rocking arm (15) is fixedly connected to the shift shaft (16), a second rocking arm (12) is fixedly connected to the shift shaft (16), the other end of the second rocking arm (12) is hinged to the connecting rod (13), and the other end of the connecting rod (13) is hinged to the T-shaped rocking arm (11); The T-shaped rocker (11) is composed of a shift execution rod section and a shift power input rod section which are perpendicular to each other and fixedly connected into one body; the two connection points of the first spline sleeve (32) and the second spline sleeve (42) with the T-shaped rocker (11) are located at the two ends of the shift execution rod section, and the swing center of the T-shaped rocker (11) is located in the middle of the shift execution rod section; the hinge point with the connecting rod (13) is located at the far end of the shift power input rod section; Two second rockers (12) are fixedly connected to the shift shaft (16), and the two second rockers (12) are respectively hinged to a corresponding T-shaped rocker (11) through the connecting rod (13). The same T-shaped rocker (11) is located on the same side of the first spline sleeve (32) and the second spline sleeve (42), and the two T-shaped rockers (11) are symmetrically arranged relative to the same spline sleeve.

2. The interlocking shift rolling mill gearbox according to claim 1, characterized in that: An annular groove (5) is formed on both the first spline sleeve (32) and the second spline sleeve (42); the far end of the shift execution rod section of the T-shaped rocker (11) is connected to a roller (6) via a roller shaft (7); and the roller (6) is in rolling connection with the annular groove (5).

3. The interlocking shift rolling mill gearbox according to claim 2, characterized in that: The roller (6) is formed with a stepped hole, and one end of the roller shaft (7) is formed with a truncated cone, and the roller shaft (7) is connected to the roller (6) by the cooperation of the truncated cone and the stepped hole. The other end of the roller shaft (7) is formed with a thread, and a nut (71) is connected to the thread. The T-shaped rocker (11) is matched with the roller shaft (7) to form an axis hole and is located in the middle of the roller shaft (7).

4. The interlocking shift rolling mill gearbox according to claim 2, characterized in that: A threaded hole is formed in the middle of the roller shaft (7), and a stepped hole is formed on the connecting portion of the T-shaped rocker (11). A locking screw passes through the stepped hole and is screwed into the threaded hole to lock and fix the T-shaped rocker (11) on the roller shaft (7).

5. The interlocking shift rolling mill gearbox according to claim 1, characterized in that: The gearbox reduction mechanism further comprises an input shaft (2), a transmission shaft (21), a first output shaft (23) and a second output shaft (22); the first output shaft (23) and the second output shaft (22) are constantly meshed through gear transmission; the input shaft (2) and the first output shaft (23) are coaxial, and a first clutch based on the first spline sleeve (32) is provided between the two; the transmission shaft (21) and the input shaft (2) are constantly meshed through gear transmission; the transmission shaft (21) and the second output shaft (22) are coaxial, and a second clutch based on the second spline sleeve (42) is provided between the two.

6. The interlocking shift rolling mill gearbox according to claim 1, characterized in that: The first clutch further comprises a first spline (3) cooperating with the first spline sleeve (32), the first spline (3) being formed on the outer peripheries of the opposite ends of the input shaft (2) and the first output shaft (23); the second clutch further comprises a second spline (41) cooperating with the second spline sleeve (42), the second spline (41) being formed on the outer peripheries of the opposite ends of the transmission shaft (21) and the second output shaft (22).

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