Double-transmission gear device and method capable of being automatically engaged and disengaged and reducing and sizing unit

Abstract

The invention discloses a double-transmission gear device and method capable of being automatically engaged and disengaged and a reducing and sizing unit, and belongs to the technical field of reducing and sizing units. The device comprises a control unit and two groups of transmission units which are arranged in parallel, the transmission unit comprises an input system assembly, an output system assembly, an engagement and disengagement assembly, a pull rod and a driving piece. The meshing and disengaging assembly comprises a first fixing assembly, a second fixing assembly and a moving assembly. One end of the pull rod is connected with the driving piece, and the other end sequentially penetrates through the first fixing assembly, the output system assembly and the middle of the second fixing assembly and is fixedly connected with the moving assembly; the moving assembly is in relative sliding connection with the second fixing assembly; and the control unit is used for at least controlling the pull rod in one group of transmission units to do reciprocating motion in the axial direction according to a control instruction output by the man-machine interaction module so as to complete engagement or disengagement of the moving assembly and the working roller. According to the invention, gear double-row transmission can be met, and meanwhile, quick replacement with a corresponding working roller is realized.

Description

Technical Field

[0001] The invention relates to a dual-drive gear device capable of automatically engaging and disengaging, a method and a sizing reduction unit, and belongs to the technical field of sizing reduction units. Background Art

[0002] As a consumable material, steel pipes are increasingly used in various fields of modern production and life. As the market's requirements for the dimensional accuracy, surface quality and organizational performance of modern fine pipes are getting higher and higher, the production methods and equipment of steel pipes are becoming more and more advanced. Among them, the use of steel pipe sizing units to produce hot-rolled seamless steel pipes is a more advanced method, and gear boxes, as a special transmission device, are also widely used in the sizing units of steel pipe production lines.

[0003] However, due to the compact system layout, complex functional structure and harsh working environment of the sizing and finishing mill, the traditional gearbox cannot meet the requirements of rapid unit replacement, and the on-site layout is limited and there are problems such as waterproofing and oil leakage. In addition, most traditional gearboxes are single-row transmissions with a small adaptability and low flexibility. Therefore, it is urgent to provide a highly adaptable transmission gearbox to solve the relevant technical drawbacks faced by the sizing and finishing mill in actual application. Summary of the invention

[0004] The object of the present invention is to provide a dual-drive gear device, method and sizing unit that can automatically engage and disengage, aiming to achieve flexible layout configuration of a steel pipe production line and significantly improve roll changing efficiency.

[0005] In order to solve the above technical problems, the present invention is implemented by adopting the following technical solutions:

[0006] In one aspect, the present invention provides a dual transmission gear device capable of automatically engaging and disengaging, comprising: a control unit, and two sets of transmission units arranged in parallel with each other;

[0007] The transmission unit comprises: an input system component, an output system component, an engagement and disengagement component, a pull rod and a driving member, wherein the input system component is engaged with the output system component, and the output system component is used to drive the working roll;

[0008] The engaging and disengaging assembly includes a first fixed assembly, a second fixed assembly and a moving assembly, and the two ends of the output system assembly are respectively connected to the first fixed assembly and the second fixed assembly; one end of the pull rod is connected to the driving member, and the other end passes through the middle of the first fixed assembly, the output system assembly and the second fixed assembly in sequence, and is fixedly connected to the top of the moving assembly; the moving assembly is relatively slidably connected to the second fixed assembly;

[0009] The control unit is electrically connected to the driving member, and is used to control at least one group of the pull rods in the transmission unit to reciprocate in the axial direction according to the control instructions output by the human-machine interaction unit, so as to complete the meshing or disengagement operation between the moving assembly and the corresponding working roll;

[0010] The meshing surfaces formed by the meshing of the input system components and the output system components corresponding to the two groups of transmission units are arranged in parallel.

[0011] The present invention innovatively designs two independent transmission paths, namely two input system components and two output system components, thereby ensuring double-row transmission and realizing flexible configuration and efficient operation of the steel pipe production line; at the same time, in view of the frequent replacement requirements of related gear devices in actual working processes, the present invention realizes a significant improvement in replacement efficiency and targeted control of the production line by effectively coordinating the human-machine interaction module, control unit, output system components, engagement and disengagement components, pull rods and drive parts.

[0012] Optionally, the input system assembly includes: a power input shaft, one end of which is provided with an input spline, and the other end of which is provided with a first bevel gear, and the input spline, the first bevel gear and the power input shaft are integrally formed;

[0013] The output system assembly includes: a power output shaft and a second bevel gear; the second bevel gear is installed in the middle of the power output shaft and meshes with the first bevel gear; one end of the power output shaft is provided with an output spline for connecting to the second fixed assembly, and the other end is connected to the first fixed assembly, and the output spline, the second bevel gear and the power output shaft are integrally formed.

[0014] Optionally, the first bevel gear and the second bevel gear are both 60° bevel gears. The 60° integral bevel gear shaft serves as a high-precision, high-torque transmission element, can achieve effective energy transfer and torque transfer, and has high transmission efficiency and load capacity.

[0015] Optionally, the moving component includes: a drum-shaped gear shaft, a drum-shaped gear coupling and an elastic connecting piece, one end of the drum-shaped gear shaft is relatively fixedly connected to the drum-shaped gear coupling in the axial direction, and the other end is provided with a corresponding drum-shaped tooth.

[0016] Optionally, the second fixing assembly includes: an inner gear sleeve and a connecting assembly, wherein the connecting assembly is sleeved on one end of the power output shaft; the output spline is relatively fixedly connected to the inner gear sleeve in the circumferential direction; the inner gear sleeve is adapted to the drum-shaped tooth, and the relative sliding limit of the drum-shaped tooth is located in the inner cavity corresponding to the inner gear sleeve, and the corresponding sliding distance is limited within the specified position range to ensure the safe operation of the equipment;

[0017] The elastic connector is sleeved on the pull rod, one end of which is in contact with the connecting assembly, and the other end passes through the drum-shaped tooth and the drum-shaped gear shaft, and is in contact with the bottom of the sinking hole opened in the drum-shaped gear shaft.

[0018] Optionally, the dual-drive gear device capable of automatically engaging and disengaging further comprises: an output shaft head sealing assembly, which comprises a dynamic ring, a static ring, a first nitriding sleeve, a first transparent cover, a first seal, a second seal and a third seal;

[0019] The first transparent cover is sleeved on the inner gear sleeve, the inner ring of the first seal is fitted with the inner gear sleeve, the upper end surface of the first seal is abutted with the inner gear sleeve, and the lower end surface is abutted with the top of the first transparent cover to form a first V-shaped seal.

[0020] Optionally, the first nitriding sleeve is arranged on the inner gear sleeve, and the inner ring of the second seal is in contact with the first nitriding sleeve, and the outer ring is in contact with the first transparent cover, wherein the second seal is arranged in two places and stacked on each other in the axial direction.

[0021] Optionally, the dynamic ring and the drum-shaped gear shaft are relatively fixed in the circumferential direction; the stationary ring is sleeved on the inner gear sleeve and fixedly connected to the top of the first transparent cover, and there is a circumferential gap between the outer circumferential surface of the stationary ring and the inner wall surface of the dynamic ring to form a mechanical seal.

[0022] Optionally, a circumferential gap between the outer peripheral surface of the static ring and the inner wall surface of the dynamic ring is set to 2 mm.

[0023] Optionally, the third seal is arranged between the dynamic ring and the drum gear coupling, and the upper end face of the third seal is used to be pressed against the corresponding working roll to form an end face seal.

[0024] Optionally, the dual-drive gear device capable of automatically engaging and disengaging further comprises an input shaft head sealing assembly, which comprises: a second nitriding sleeve, a sealing ring, a second transparent cover, a fourth sealing member and a fifth sealing member, wherein the second nitriding sleeve is sleeved on the power input shaft, and the sealing ring and the second transparent cover are sleeved on the second nitriding sleeve;

[0025] One end surface of the sealing ring is provided with a plurality of annular grooves in the circumferential direction, which are used to match with the outer ring of the field device to form a labyrinth seal.

[0026] Optionally, the fourth sealing member is installed between the other end surface of the sealing ring and the second transparent cover, and the inner ring of the fourth sealing member is in contact with the second nitriding sleeve, and the outer ring is in contact with the second transparent cover.

[0027] Optionally, one end surface of the fifth sealing member abuts against a corresponding hollow groove in the middle of the sealing ring, and the inner ring of the fifth sealing member fits with the second nitriding sleeve to form a second V-shaped seal.

[0028] The related sealing designs such as V-type seals, end face seals and mechanical seals can prevent external water and oil from entering, thus ensuring the service life of related components.

[0029] Optionally, the tooth portion of the drum gear coupling is chamfered in the tooth shape direction, with a chamfer of 10° on both sides of the tooth;

[0030] The teeth of the drum gear coupling are chamfered in the tooth direction, the tooth thickness is set to 1 mm, the chamfers on both sides are 50°, and the middle of the chamfers are also chamfered by 30° for quick disengagement and engagement.

[0031] Optionally, the hardness of the corresponding tooth portion of the drum gear coupling is 650HV. This higher hardness design enables the drum gear coupling to effectively resist external pressure, wear and scratch to a certain extent.

[0032] Optionally, the depth of the nitriding layer of the corresponding tooth portion of the drum-shaped gear coupling is 0.5-1 mm. The thicker nitriding layer depth can significantly improve the wear resistance, corrosion resistance and hardness of the material.

[0033] In a second aspect, the present invention further provides a method for engaging and disengaging a dual transmission gear device capable of automatic engagement and disengagement as described in the first aspect, comprising:

[0034] Obtaining the engagement or disengagement control instructions output by the human-computer interaction module;

[0035] In response to the engagement or disengagement control instruction output by the human-machine interaction module, the control unit controls at least one group of pull rods in the transmission unit to reciprocate in the axial direction to complete the engagement or disengagement operation between the moving component and the corresponding working roll.

[0036] When the control unit receives the relevant signal of engagement or disengagement output by the human-machine interaction unit, the relevant controller will activate the corresponding actuator, such as a hydraulic cylinder or servo motor, to push the corresponding docking component towards or away from the working roller, thereby completing the corresponding engagement or disengagement operation. The whole process is highly practical and targeted.

[0037] Optionally, the disengagement operation of the movable assembly from the corresponding working roll includes:

[0038] The control unit controls at least one group of the pull rods of the transmission units to move axially away from the working roll according to the corresponding disengagement control instructions, so as to drive the drum gear coupling installed on one side of the pull rod to perform a corresponding disengagement operation with the working roll; wherein, when the drum gear coupling is disengaged from the corresponding working roll, the elastic connecting member is in a corresponding compression state.

[0039] Optionally, the meshing operation of the moving assembly and the corresponding working roll includes:

[0040] The control unit controls at least one group of the pull rods of the transmission units to move axially close to the working roll according to the corresponding engagement control instructions, so as to drive the drum gear coupling installed on one side of the pull rod to perform corresponding engagement operations with the working roll; wherein, when the drum gear coupling is engaged with the corresponding working roll, the elastic connecting member is in a corresponding stretched state.

[0041] In a third aspect, the present invention further provides a sizing reduction unit, which includes a dual transmission gear device that can automatically engage and disengage as described in the first aspect.

[0042] Compared with the prior art, the present invention has the following beneficial effects:

[0043] The present invention changes the single-row design of the traditional angular gearbox and innovatively adopts a double-row transmission to achieve flexible configuration of the steel pipe production line. At the same time, the structural design of the relevant meshing and disengaging components also significantly improves the roll changing efficiency; secondly, the present invention accurately transmits torque through the 60° integral gear shaft, avoiding the technical disadvantages of poor part stiffness and coaxiality caused by the split processing between the bevel gear and the transmission shaft, poor meshing at high linear speeds, and high vibration; in addition, in the face of the problem that the drum gear coupling in the existing equipment is not smooth to replace and has a large wear, the present invention not only performs special shaping and chamfering treatment on the drum gear coupling to meet the needs of fast roll changing, but also performs nitriding treatment on the relevant tooth surface to increase the hardness and reduce wear; in addition, since the relevant sealing structure of the existing equipment is poor, the seal will cause a certain degree of wear. The present invention uses a combined sealing structure in a targeted manner to effectively achieve waterproofing and oil leakage prevention, and the sealing effect is significantly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 Shown is a front view schematic diagram of a dual transmission gear device capable of automatically engaging and disengaging according to the present invention;

[0045] Figure 2 The figure is a side view schematic diagram of the dual transmission gear device of the present invention which can automatically engage and disengage;

[0046] Figure 3The figure shows a transmission structure schematic diagram of I corresponding to the transmission unit in the present invention;

[0047] Figure 4 The figure shows the transmission structure diagram of II corresponding to the transmission unit in the present invention;

[0048] Figure 5 Shown is a schematic structural diagram of the input shaft head in the present invention;

[0049] Figure 6 Shown is a schematic structural diagram of the output shaft head in the present invention;

[0050] Figure 7 It is a structural schematic diagram of the drum gear coupling and the working roll in meshing state of the present invention;

[0051] Figure 8 It is a structural schematic diagram of the drum gear coupling of the present invention and the disengagement state of the working roll;

[0052] Fig. 9 The present invention is shown Figure 3 A partial enlarged view of point a in the middle;

[0053] Fig.10 Shown Figure 3 Schematic diagram of the chamfer of the end face of the drum gear corresponding to direction A;

[0054] In the figure: 1-input system assembly; 2-output system assembly; 3-pull rod; 4-driving member; 5-first fixed assembly; 6-second fixed assembly; 7-moving assembly; 8-power input shaft; 9-input spline; 10-first bevel gear; 11-power output shaft; 12-second bevel gear; 13-output spline; 14-drum gear shaft; 15-drum gear coupling; 16-elastic connecting member; 17-drum gear; 18-inner gear sleeve; 19-connecting assembly; 20-moving ring; 21-static ring; 22-first nitriding sleeve; 23-first transparent cover; 24-first sealing member; 25-second sealing member; 26-third sealing member; 27-second nitriding sleeve; 28-sealing ring; 29-second transparent cover; 30-fourth sealing member; 31-fifth sealing member; 32-drainage outlet; 33-housing; 34-ring groove; 35-outer ring. DETAILED DESCRIPTION

[0055] The present invention will be further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention.

[0056] Example 1

[0057] like Figures 1 to 4As shown, this embodiment introduces a dual-drive gear device that can automatically engage and disengage, which includes: a box 33, a human-machine interaction unit, a control unit, and two sets of transmission units arranged in parallel with each other; the box 33 is made of high-strength, wear-resistant alloy steel material to ensure its sufficient strength and stability;

[0058] The transmission unit comprises: an input system component 1, an output system component 2, an engagement and disengagement component, a pull rod 3 and a driving member 4, wherein the input system component 1 is engaged with the output system component 2, and the output system component 2 is used to drive the working roll;

[0059] The engaging and disengaging assembly includes a first fixed assembly 5, a second fixed assembly 6 and a moving assembly 7. The two ends of the output system assembly 2 are respectively connected to the first fixed assembly 5 and the second fixed assembly 6; one end of the pull rod 3 is connected to the driving member 4, and the other end passes through the middle of the first fixed assembly 5, the output system assembly 2 and the second fixed assembly 6 in sequence, and is fixedly connected to the top of the moving assembly 7; the moving assembly 7 is relatively slidably connected to the second fixed assembly 6;

[0060] The control unit is electrically connected to the driving member 4, and is used to control the pull rod 3 in at least one group of transmission units to reciprocate in the axial direction according to the control instruction output by the human-machine interaction unit, so as to drive the moving assembly 7 to slide correspondingly in the axial direction relative to the second fixed assembly 6, thereby completing the meshing or disengagement operation of the moving assembly 7 and the corresponding working roll;

[0061] Among them, the meshing surfaces formed by the meshing of the input system components 1 and the output system components 2 corresponding to the two sets of transmission units are arranged in parallel, that is, the two sets of transmission units in the present invention are independent of each other and have two independent transmission paths. Although the structures are similar, the positions are different.

[0062] In practical application of this embodiment, the dual transmission gear device is first required to be docked with the corresponding roller component. Specifically, the relevant controller in the control unit will control the corresponding driving member 4, such as the hydraulic cylinder, to move accordingly on its axis according to the meshing control signal output by the human-machine interaction unit. The hydraulic cylinder drives the pull rod 3 connected thereto to move synchronously, so that the moving component 7 fixedly connected to the pull rod 3 is docked and meshed with the corresponding working roller.

[0063] After the meshing is completed, the dual-drive gear device transmits the power of the motor or other power source to the roller working parts through its internal gear transmission system, thereby reducing and sizing the steel pipe;

[0064] If it is necessary to disengage and replace the roll, the relevant controller in the control unit will control the corresponding hydraulic cylinder to drive the pull rod 3 connected to it to move in the opposite direction synchronously according to the disengagement control signal output by the human-machine interaction unit, so that the moving component 7 fixed to the pull rod 3 is disengaged from the corresponding working roll, and then the next step of reconnecting the roll is carried out.

[0065] It is worth noting that since the present invention involves two sets of independent transmission units, under the corresponding engagement and disengagement control, the moving component 7 in one of the transmission units can be individually controlled to engage or disengage with the relevant working roller, or the two moving components 7 in the two transmission units can be simultaneously controlled to engage and / or disengage with their corresponding working rollers, which is highly flexible and targeted.

[0066] Example 2

[0067] This embodiment, in response to the requirements of Baosteel's precision rolling tube production line, provides a dual transmission gear device for 159 steel tubes that can automatically engage and disengage based on Embodiment 1. The specific design is as follows:

[0068] The input system assembly 1 comprises: a power input shaft 8, one end of which is provided with an input spline 9, and the other end of which is provided with a first bevel gear 10, and the input spline 9, the first bevel gear 10 and the power input shaft 8 are integrally formed;

[0069] The output system assembly 2 includes: a power output shaft 11 and a second bevel gear 12; the second bevel gear 12 is installed in the middle of the power output shaft 11 and meshes with the first bevel gear 10; one end of the power output shaft 11 is provided with an output spline 13 for connecting with the second fixed assembly 6, and the other end is connected with the first fixed assembly 5, and the output spline 13, the second bevel gear 12 and the power output shaft 11 are integrally formed;

[0070] The first bevel gear 10 and the second bevel gear 12 are both 60° bevel gears. The bevel gears and transmission shafts in the existing equipment are processed separately, that is, assembled and combined. The rigidity and coaxiality of the parts are relatively poor, and the technical disadvantages of poor meshing and high vibration are easily caused at high linear speeds. This embodiment uses a 60° integral bevel gear to accurately transmit torque, increase rigidity and reduce vibration.

[0071] The moving assembly 7 comprises: a drum gear shaft 14, a drum gear coupling 15 and an elastic connecting member 16. One end of the drum gear shaft 14 is relatively fixedly connected to the drum gear coupling 15 in the axial direction, and the other end is provided with a corresponding drum gear 17.

[0072] The second fixing assembly 6 comprises: an inner gear sleeve 18 and a connecting assembly 19, wherein the connecting assembly 19 can be a shaft end baffle, and the connecting assembly 19 is sleeved on one end of the power output shaft 11; the output spline 13 is relatively fixedly connected to the inner gear sleeve 18 in the circumferential direction; the inner gear sleeve 18 is adapted to the drum-shaped teeth 17, and the drum-shaped teeth 17 are relatively slidably limited in the inner cavity corresponding to the inner gear sleeve 18, and the axial limit can be achieved by setting a corresponding limit ring on the top of the inner gear sleeve 18;

[0073] The elastic connector 16 is sleeved on the pull rod 3, one end of which is in contact with the connecting assembly 19, and the other end of which passes through the drum-shaped tooth 17 and the drum-shaped gear shaft 14, and is in contact with the bottom of the sinking hole opened in the drum-shaped gear shaft 14. The elastic connector 16 can be a spring. In addition, the driving member 4 can be a hydraulic cylinder, which is threadedly connected to the pull rod 3, the pull rod 3 is inserted into the spring, and the spring is then inserted into the drum-shaped gear shaft 14; at the end of the pull rod 3, it is relatively fixed to the drum-shaped gear coupling 15 through a non-standard nut.

[0074] refer to Figure 2 The double transmission gearbox is divided into two parallel transmissions, the right side is transmission I and the left side is transmission II. The two transmissions are independent of each other, with similar structures and staggered output torque transmission positions.

[0075] Specifically, for the right side position I transmission, power is transmitted from the input spline 9, transmitted through the power input shaft 8 and the 60° first bevel gear 10, and transmitted to the 60° second bevel gear 12 and the power output shaft 11. The power output shaft 11 transmits power to the internal gear sleeve 18 through the output spline 13, and the internal gear sleeve 18 transmits power to the drum gear shaft 14 through the drum gear 17. The drum gear shaft 14 drives the drum gear coupling 15 to transmit power to the working roll to complete the power transmission; similarly, the left side position II transmission will also complete the power transmission like the right side position I transmission, and the related process will not be repeated.

[0076] In addition, the working environment of the transmission gear device is harsh, and the outer surface of the gear box is exposed to water and oil for a long time. This embodiment also solves the problem of waterproof and oil leakage by referring to the combined sealing method. For details, please refer to Figure 5 and Figure 6 .

[0077] The output shaft head adopts end face seal, mechanical seal and V-shaped seal to prevent water and oil from entering the gear box on site, and a double skeleton oil seal is used to prevent the leakage of gear box lubricating oil.

[0078] Specifically, the corresponding output shaft head sealing assembly includes: a dynamic ring 20, a static ring 21, a first nitriding sleeve 22, a first transparent cover 23, a first sealing member 24, a second sealing member 25 and a third sealing member 26;

[0079] The first transparent cover 23 is sleeved on the inner gear sleeve 18, the inner ring of the first sealing member 24 is in contact with the inner gear sleeve 18, the upper end surface of the first sealing member 24 is in contact with the inner gear sleeve 18, and the lower end surface is in contact with the top of the first transparent cover 23, so as to form a first V-shaped seal;

[0080] The first nitriding sleeve 22 is sleeved on the inner gear sleeve 18, and the inner ring of the second sealing member 25 is in contact with the first nitriding sleeve 22, and the outer ring is in contact with the first transparent cover 23, wherein the second sealing member 25 is provided at two locations and stacked on each other in the axial direction;

[0081] The moving ring 20 and the drum gear shaft 14 are relatively fixed in the circumferential direction; the stationary ring 21 is sleeved on the inner gear sleeve 18 and fixedly connected to the top of the first transparent cover 23, and there is a circumferential gap between the outer circumferential surface of the stationary ring 21 and the inner wall surface of the moving ring 20, wherein the circumferential gap is set to 2mm to form a mechanical seal, making it difficult for external water and oil to enter;

[0082] The third seal 26 is arranged between the moving ring 20 and the drum gear coupling 15. The upper end face of the third seal 26 is used to be squeezed with the corresponding working roller to form an end face seal. The end face seal will contact the working roller, and the working roller applies axial force to the end face seal, so that external water and oil cannot enter.

[0083] In addition, in order to prevent the entry of water vapor, a corresponding drain port 32 is provided to discharge the entered water vapor out of the gear box, wherein the drain port can discharge the water vapor blocked by the V-shaped seal out of the device from here.

[0084] The input shaft head is effectively sealed by setting a labyrinth seal and a V-shaped oil seal to prevent external water and oil from entering the gearbox and the lubricating oil inside the gearbox from leaking out of the box.

[0085] Specifically, the corresponding input shaft head sealing assembly includes: a second nitriding sleeve 27, a sealing ring 28, a second transparent cover 29, a fourth sealing member 30 and a fifth sealing member 31, wherein the second nitriding sleeve 27 is sleeved on the power input shaft 8, and the sealing ring 28 and the second transparent cover 29 are sleeved on the second nitriding sleeve 27;

[0086] The sealing ring 28 has a plurality of annular grooves 34 on one end surface thereof in the circumferential direction. Specifically, two annular grooves 34 may be used to match with the outer ring 35 of the field device to form a labyrinth seal.

[0087] The fourth seal 30 is installed between the other end surface of the sealing ring 28 and the second transparent cover 29, and the inner ring of the fourth seal 30 is in contact with the second nitriding sleeve 27, and the outer ring is in contact with the second transparent cover 29. This design can effectively prevent the leakage of lubricating oil inside the gear box, wherein the relevant nitriding sleeve has a high hardness and can reduce the leakage of lubricating oil caused by wear failure.

[0088] One end face of the fifth seal 31 abuts against a corresponding hollow groove in the middle of the seal ring 28, and the inner ring of the fifth seal 31 fits with the second nitriding sleeve 27 to form a second V-shaped seal. The V-shaped seal prevents a small amount of water that enters the gear box during long-term operation from entering the interior of the gear box, thereby achieving a secondary waterproof effect.

[0089] In the existing equipment, the heat treatment method of the drum gear coupling 15 is generally quenching and tempering, and the tooth part adopts a single modification, which easily causes problems such as unsmooth replacement and large wear of the drum gear in a working environment with frequent replacement. In order to avoid the continued existence of related technical problems, this embodiment specifically performs special modification and chamfering on the relevant drum gear, and performs nitriding treatment on the relevant tooth surface, which significantly improves the replacement efficiency, increases the hardness, and reduces the wear accordingly. For details, please refer to Fig. 9 and Fig.10 .

[0090] Specifically, the drum gear coupling 15 is subjected to special tooth shaping and chamfering. The shaping and chamfering are performed in the tooth shape direction, with a 10° chamfer on both sides of the teeth, and a certain length of shaping is performed in the tooth width direction to improve the meshing color and optimize the meshing; in the tooth direction, the left side of the tooth is chamfered, the tooth thickness is left at 1mm, and a 50° chamfer is performed on both sides, and then a 30° chamfer is performed in the middle of the chamfer to achieve rapid disengagement or meshing. Secondly, the entire tooth of the drum gear coupling 15 is nitrided, with a hardness of 650HV and a nitrided layer depth of 0.5-1mm, to effectively solve the problem of easy wear and scratching.

[0091] In addition, it is worth mentioning that the dual-drive gear device can also be equipped with a corresponding lubrication system to ensure the normal operation and extended service life of key components such as gears.

[0092] Example 3

[0093] This embodiment provides a method for engaging and disengaging a dual transmission gear device capable of automatically engaging and disengaging as described in Embodiment 1 or Embodiment 2, which comprises the following steps:

[0094] Obtaining the engagement or disengagement control instructions output by the human-computer interaction module;

[0095] In response to the engagement or disengagement control instruction output by the human-machine interaction module, the control unit controls at least one group of pull rods 3 in the transmission unit to reciprocate in the axial direction to complete the engagement or disengagement operation of the moving assembly 7 with the corresponding working roll.

[0096] In the specific application of this embodiment, it is necessary to first inject a certain pressure of hydraulic oil into the hydraulic cylinder to make the relevant parts reciprocate on their axes. Specifically, when the gear device needs to be disengaged, the gear box is in a meshing state, such as Figure 7 The hydraulic cylinder drives the tie rod 3 to move away from the working roll, so as to drive the drum gear shaft 14 to move away from the working roll in the inner gear sleeve 18, and the drum gear shaft 14 will also drive the drum gear coupling 15 to move together, and accordingly, the spring is compressed, and finally the drum gear coupling 15 is separated from the corresponding working roll.

[0097] When the gear device needs to be engaged, the gear device is in a disengaged state, such as Figure 8 The hydraulic cylinder drives the tie rod 3 to move closer to the working roll, and the spring in the compressed state pushes the drum gear shaft 14 to move closer to the working roll in the inner gear sleeve 18, and the drum gear shaft 14 drives the drum gear coupling 15 to move closer to the working roll at the same time, until the drum gear coupling 15 is meshed with the corresponding working roll.

[0098] Similarly, under the corresponding engagement and disengagement control, this embodiment can individually control the moving component 7 in one of the transmission units, that is, the drum gear coupling 15 to engage or disengage with the relevant working roller, and can also simultaneously control the two drum gear couplings 15 in the two transmission units to engage and / or disengage with their corresponding working rollers, which is highly flexible and targeted.

[0099] Example 4

[0100] Based on Example 3, this example describes in detail the corresponding implementation process of the engagement or disengagement operation of the moving component and the working roll, as follows:

[0101] The disengagement operation of the moving component 7 and the corresponding working roll includes: the control unit controls at least one group of the pull rods 3 of the transmission unit to move axially away from the working roll according to the corresponding disengagement control instructions, so as to drive the drum gear coupling 15 installed on one side of the pull rod 3 to perform the corresponding disengagement operation with the working roll; wherein, when the drum gear coupling 15 is disengaged from the corresponding working roll, the elastic connecting member 16 is in a corresponding compression state.

[0102] The meshing operation of the moving assembly 7 and the corresponding working roll includes:

[0103] The control unit controls at least one group of the pull rods 3 of the transmission units to move axially close to the working roll according to the corresponding meshing control instructions, so as to drive the drum gear coupling 15 installed on one side of the pull rod 3 to perform corresponding meshing operations with the working roll; wherein, when the drum gear coupling 15 is meshing with the corresponding working roll, the elastic connecting member 16 is in a corresponding stretched state.

[0104] Example 5

[0105] This embodiment provides a sizing reduction unit, which includes a dual-drive gear device that can automatically engage and disengage as described in Embodiment 1 or Embodiment 2.

[0106] In the description of the present disclosure / application, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "inside", "outside", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only used to explain the relative positional relationship, movement, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly. It is only for the convenience of describing the present disclosure / application 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 operated in a specific orientation, and therefore cannot be understood as a limitation to the present disclosure / application.

[0107] In addition, the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first", "second", etc. may explicitly or implicitly include one or more of the feature. In the description of this disclosure / application, unless otherwise specified, "plurality" means two or more.

[0108] In the description of this disclosure / application, 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 this disclosure / application can be understood according to specific circumstances.

[0109] The above is only a preferred implementation of the present disclosure / application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present disclosure / application, and these improvements and modifications should also be regarded as the scope of protection of the present disclosure / application.

Claims

1. A dual transmission gear device capable of automatically engaging and disengaging, characterized in that: include: A control unit, and two sets of transmission units arranged in parallel with each other; The transmission unit comprises: an input system component (1), an output system component (2), an engagement and disengagement component, a pull rod (3) and a driving member (4); the input system component (1) is engaged with the output system component (2); and the output system component (2) is used to drive a working roll; The engaging and disengaging assembly comprises a first fixed assembly (5), a second fixed assembly (6) and a moving assembly (7); the two ends of the output system assembly (2) are respectively connected to the first fixed assembly (5) and the second fixed assembly (6); one end of the pull rod (3) is connected to the driving member (4), and the other end passes through the middle of the first fixed assembly (5), the output system assembly (2) and the second fixed assembly (6) in sequence, and is fixedly connected to the top of the moving assembly (7); the moving assembly (7) is slidably connected to the second fixed assembly (6); The control unit is electrically connected to the driving member (4) and is used to control the pull rod (3) in at least one group of transmission units to reciprocate in the axial direction according to the control instruction output by the human-machine interaction unit, so as to complete the meshing or disengagement operation of the moving assembly (7) and the corresponding working roller; The meshing surfaces formed by the meshing of the input system components (1) and the output system components (2) corresponding to the two sets of transmission units are arranged in parallel.

2. The dual transmission gear device capable of automatic engagement and disengagement according to claim 1, characterized in that: The input system component (1) comprises: a power input shaft (8), one end of which is provided with an input spline (9), and the other end of which is provided with a first bevel gear (10), and the input spline (9), the first bevel gear (10) and the power input shaft (8) are integrally formed; The output system component (2) comprises: a power output shaft (11) and a second bevel gear (12); the second bevel gear (12) is mounted at the middle of the power output shaft (11) and meshes with the first bevel gear (10); one end of the power output shaft (11) is provided with an output spline (13) for connecting to the second fixed component (6), and the other end is connected to the first fixed component (5), and the output spline (13), the second bevel gear (12) and the power output shaft (11) are integrally formed; Wherein, the first bevel gear (10) and the second bevel gear (12) are both 60° bevel gears.

3. The dual transmission gear device capable of automatic engagement and disengagement according to claim 2, characterized in that: The moving assembly (7) comprises: a drum-shaped gear shaft (14), a drum-shaped gear coupling (15) and an elastic connecting piece (16); one end of the drum-shaped gear shaft (14) is relatively fixedly connected to the drum-shaped gear coupling (15) in the axial direction, and the other end is provided with a corresponding drum-shaped tooth (17); The second fixing assembly (6) comprises: an inner gear sleeve (18) and a connecting assembly (19), wherein the connecting assembly (19) is sleeved on one end of the power output shaft (11); the output spline (13) is relatively fixedly connected to the inner gear sleeve (18) in the circumferential direction; the inner gear sleeve (18) is adapted to the drum-shaped teeth (17), and the drum-shaped teeth (17) are relatively slidably limited in an inner cavity corresponding to the inner gear sleeve (18); The elastic connecting member (16) is sleeved on the pull rod (3), one end of which is in contact with the connecting assembly (19), and the other end of which passes through the drum-shaped tooth (17) and the drum-shaped gear shaft (14), and is in contact with the bottom of the sinking hole opened in the drum-shaped gear shaft (14).

4. The dual transmission gear device capable of automatic engagement and disengagement according to claim 3, characterized in that: Also includes: An output shaft head sealing assembly, comprising a dynamic ring (20), a static ring (21), a first nitriding sleeve (22), a first transparent cover (23), a first sealing member (24), a second sealing member (25) and a third sealing member (26); The first transparent cover (23) is sleeved on the inner gear sleeve (18), the inner ring of the first sealing member (24) is in contact with the inner gear sleeve (18), the upper end surface of the first sealing member (24) is in contact with the inner gear sleeve (18), and the lower end surface is in contact with the top of the first transparent cover (23), so as to form a first V-shaped seal; The first nitriding sleeve (22) is sleeved on the inner gear sleeve (18), and the inner ring of the second sealing member (25) is in contact with the first nitriding sleeve (22), and the outer ring is in contact with the first transparent cover (23), wherein the second sealing member (25) is provided at two locations and is stacked on each other in the axial direction; The moving ring (20) and the drum-shaped gear shaft (14) are relatively fixed in the circumferential direction; the stationary ring (21) is sleeved on the inner gear sleeve (18) and is fixedly connected to the top of the first transparent cover (23); a circumferential gap exists between the outer circumferential surface of the stationary ring (21) and the inner wall surface of the moving ring (20), wherein the circumferential gap is set to 2 mm to form a mechanical seal; The third sealing member (26) is arranged between the dynamic ring (20) and the drum gear coupling (15), and the upper end surface of the third sealing member (26) is used to be pressed against the corresponding working roll to form an end surface seal.

5. The automatically engageable and disengageable dual transmission gear device according to claim 3, characterized in that: It also includes an input shaft head sealing assembly, which includes: a second nitriding sleeve (27), a sealing ring (28), a second transparent cover (29), a fourth sealing member (30) and a fifth sealing member (31), wherein the second nitriding sleeve (27) is sleeved on the power input shaft (8), and the sealing ring (28) and the second transparent cover (29) are sleeved on the second nitriding sleeve (27); One end surface of the sealing ring (28) is provided with a plurality of annular grooves (34) in the circumferential direction, which are used to match with the outer ring (35) of the field device to form a labyrinth seal; The fourth sealing member (30) is installed between the other end surface of the sealing ring (28) and the second transparent cover (29), and the inner ring of the fourth sealing member (30) is in contact with the second nitriding sleeve (27), and the outer ring is in contact with the second transparent cover (29); One end surface of the fifth sealing member (31) abuts against a corresponding hollow groove in the middle of the sealing ring (28), and the inner ring of the fifth sealing member (31) fits against the second nitriding sleeve (27) to form a second V-shaped seal.

6. The automatically engageable and disengageable dual transmission gear device according to claim 3, characterized in that: Performing shaping and chamfering on the tooth portion of the drum-shaped gear coupling (15) in the tooth shape direction, with chamfers of 10° on both sides of the tooth; The tooth portion of the drum-shaped gear coupling (15) is chamfered in the tooth direction, the tooth thickness is set to 1 mm, the two sides are chamfered at 50°, and the middle of the chamfer is also chamfered at 30° for quick disengagement and engagement; The nitriding layer depth of the corresponding tooth portion of the drum-shaped gear coupling (15) is 0.5-1 mm, and the hardness is 650 HV.

7. A method for engaging and disengaging a dual transmission gear device capable of automatically engaging and disengaging as claimed in any one of claims 3 to 6, characterized in that: include: Obtaining the engagement or disengagement control instructions output by the human-computer interaction module; In response to the engagement or disengagement control instruction output by the human-machine interaction module, the control unit controls at least one group of pull rods (3) in the transmission unit to reciprocate in the axial direction to complete the engagement or disengagement operation of the moving assembly (7) and the corresponding working roller.

8. The method for engaging and disengaging according to claim 7, characterized in that: The disengagement operation of the moving assembly (7) and the corresponding working roll comprises: The control unit controls the tie rod (3) of at least one group of transmission units to move axially away from the working roll according to the corresponding disengagement control instruction, so as to drive the drum gear coupling (15) installed on one side of the tie rod (3) to perform a corresponding disengagement operation with the working roll; Wherein, when the drum-shaped gear coupling (15) is disengaged from the corresponding working roll, the elastic connecting member (16) is in a corresponding compressed state.

9. The method for engaging and disengaging according to claim 7, characterized in that: The meshing operation of the moving assembly (7) and the corresponding working roll comprises: The control unit controls the pull rod (3) of at least one group of transmission units to move axially close to the working roll according to the corresponding meshing control instruction, so as to drive the drum gear coupling (15) installed on one side of the pull rod (3) to perform corresponding meshing operation with the working roll; Wherein, when the drum-shaped gear coupling (15) is engaged with the corresponding working roll, the elastic connecting member (16) is in a corresponding stretched state.

10. A sizing unit, characterized in that: The invention comprises a double transmission gear device capable of automatically engaging and disengaging as claimed in any one of claims 1 to 6.

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