Main transmission connecting shaft for continuous rolling of seamless tube

Abstract

The invention discloses a seamless tube continuous rolling main transmission connecting shaft, and belongs to the technical field of crowned tooth connecting shafts. The roller end inner tooth assembly and the tooth end shaft sleeve assembly are arranged at the two ends and used for being connected with external equipment, the roller end outer tooth assembly and the middle shaft assembly are connected between the roller end inner tooth assembly and the tooth end shaft sleeve assembly, the middle shaft assembly comprises a long telescopic spline pair, and the roller end inner tooth assembly is rapidly replaced through the long telescopic spline pair. The long telescopic spline pair comprises a spline sleeve and a spline shaft which are respectively provided with an inner spline and an outer spline, and the inner spline and the outer spline are in clearance fit and sliding connection to form clearance sliding, so that inner teeth and outer teeth of the roller end inner tooth assembly and the roller end outer tooth assembly can be quickly separated and matched, and the roller end inner tooth assembly can be quickly replaced; all the components are sequentially connected to finally form a main transmission connecting shaft capable of transmitting torque, compensating angles and extending and retracting in a long stroke, and the continuous on-machine service life of the connecting shaft is prolonged while connecting shaft jumping and overhaul and maintenance time are shortened.

Description

Technical Field

[0001] The invention relates to the technical field of drum gear couplings, in particular to a main transmission coupling for continuous rolling of seamless pipes. Background Art

[0002] Since its introduction, the two-roller longitudinal rolling mill has developed rapidly, and has won people's favor for its high quality, high yield and low consumption, and has become the mainstream of seamless steel pipe production. However, as people's understanding of the two-roller rolling process deepens and their understanding of production practice deepens, they find that the two-roller rolling mill has a major problem, that is, quality defects will occur due to uneven deformation of the metal during the rolling process. With the increase of hole size, diameter-to-wall ratio and alloy ratio of rolled materials, the problem becomes more and more serious. The yield rate of some high-end products is only 50%. For this reason, experts and scholars at home and abroad have been looking for ways to solve this problem.

[0003] With the advancement of my country's infrastructure construction and the widespread application of structural parts and mechanical parts in the construction of energy pipeline facilities, the market demand for seamless steel pipe products is increasing. Through the efforts of Chinese and foreign experts, a three-roller continuous rolling mill was developed in the early 21st century to solve the above problems. Compared with the two-roller continuous rolling process, the three-roller continuous rolling mill (i.e., PREMIUM QUALITY FINISHING, referred to as PQF mill) has uniform steel pipe wall thickness, high precision, low tool consumption, can produce high-alloy and large-diameter ratio varieties, can reduce the loss of cutting head and tail, and has a high yield. The condition of its transmission shaft directly affects the production of seamless steel pipes. At present, the mill shaft has been gradually optimized in recent years, but there are still the following disadvantages:

[0004] 1. Water enters the intermediate shaft assembly, corrodes the spring and spline pair, causing large shaft runout and expansion and contraction jamming, seriously affecting the on-site roll replacement and maintenance time;

[0005] 2. The spring is installed inside the spline shaft. The spring force is insufficient and it is easy to get stuck. After running for a period of time, the spring fails and cannot rebound, causing the internal and external teeth on the roller side to not cooperate effectively, increasing the inspection and maintenance time and labor costs;

[0006] 3. The sealing structure of the tooth side cavity is poor and oil leakage causes rapid wear of the internal and external teeth;

[0007] 4. The outer gear sleeve on the tooth side and the spline shaft are matched with the spline pair clearance. After running for a period of time, the gland cannot be effectively fixed, and the outer gear sleeve is easy to fall off, which seriously affects the quality of the seamless pipe;

[0008] Combined with the above reasons, the service life of the connecting shaft of the seamless pipe rolling machine is short, which cannot meet the requirement of continuous use of the connecting shaft on the seamless pipe continuous rolling production line for not less than 12 months. Summary of the invention

[0009] 1. Technical problems to be solved by the invention:

[0010] In view of the problems that the existing seamless pipe machine coupling shaft has a short continuous on-machine service life and a long overhaul and maintenance time, the present invention provides a seamless pipe continuous rolling main transmission coupling shaft, which connects the roller end outer tooth assembly and the intermediate shaft assembly between the roller end inner tooth assembly and the tooth end sleeve assembly. While achieving torque transmission, the coupling shaft vibration can be reduced through the synergistic effect of angle compensation, thereby achieving the purpose of increasing the continuous on-machine service life of the coupling shaft.

[0011] 2. Technical solution:

[0012] In order to achieve the above object, the technical solution provided by the present invention is:

[0013] A main transmission coupling shaft for seamless tube continuous rolling includes a roller end inner tooth assembly and a tooth end shaft sleeve assembly for connecting external equipment at both ends; it also includes a roller end outer tooth assembly and an intermediate shaft assembly connected between the roller end inner tooth assembly and the tooth end shaft sleeve assembly to realize torque transmission and angle compensation. The intermediate shaft assembly includes a long telescopic spline pair, and the roller end inner tooth assembly is quickly replaced through the long telescopic spline pair. The long telescopic spline pair includes a spline sleeve and a spline shaft respectively having inner splines and outer splines. The inner splines and the outer splines are clearance-fitted and slidingly connected to form clearance sliding, so that the inner and outer teeth of the roller end inner tooth assembly and the roller end outer tooth assembly can be quickly disengaged and matched, which is convenient for the rapid replacement of the roller end inner tooth assembly. The roller end inner tooth assembly, the roller end outer tooth assembly, the intermediate shaft assembly and the tooth end shaft sleeve assembly are connected in sequence to finally form a main transmission coupling shaft that can transmit torque, angle compensation and long-stroke telescopic, while reducing the coupling shaft jump and the overhaul and maintenance time, and improving the continuous service life of the coupling shaft on the machine.

[0014] A further technical solution is that the intermediate shaft assembly also includes spring one, positioning block one, spring two, retaining ring two, positioning block two, retaining ring three and hydraulic fork; a positioning step and a spring installation outer circle are arranged in sequence on the left part of the spline shaft, and an external spline is arranged in the middle; the positioning block one is installed on the positioning step with interference fit, the spring one is pressed against the left end of the spline shaft in the spline sleeve, and the spring two is pressed against the positioning block one and then surrounds the spring installation outer circle; the retaining ring two is fixed to the outer wall of the spline sleeve, and the hydraulic fork is pressurized on the retaining ring two; the compression of the spring one and the spring two can realize the rapid disengagement of the inner and outer teeth of the roller end, and the worn inner tooth assembly of the roller end can be replaced in time; the hydraulic fork is pressurized on the retaining ring two to compress the spring one and the spring two, and after the hydraulic fork is depressurized, the spring one and the spring two restore their lengths by their own elastic force, and finally form a spline pair that can be freely extended and retracted; the positioning block two is installed on the right end of the spline sleeve and fixed with the retaining ring three, which plays an external positioning and guiding role when the spline pair is extended and retracted, thereby reducing the wear and jamming risk of the spline pair.

[0015] A further technical solution is that the intermediate shaft assembly also includes an inner gear ring, an outer gear sleeve, a hydraulic shift fork and a top block three; the outer circle of the spline shaft end is provided with a double keyway, which is interference fit with the outer gear sleeve also provided with a double keyway and then installed with a double key to transmit torque; the outer gear sleeve has double arc-surface external teeth that cooperate with the inner gear ring with internal teeth to form tooth side angle compensation and torque transmission; the top block three is provided with an arc-surface matching tooth side internal and external tooth angle compensation.

[0016] According to a further technical solution, the end inner tooth assembly includes an inner tooth sleeve, a connecting plate, a washer 2 and a bolt 2; the roller end outer tooth assembly includes a top block 1, an outer tooth sleeve, a retaining ring 2, a baffle 1, a sealing ring 3, a protective cover 2, a screw plug 1, a locking screw and an aluminum block;

[0017] The inner teeth of the inner gear sleeve are matched with the outer teeth of the left end of the outer gear sleeve, and the right end of the outer gear sleeve is provided with end face teeth to match the end face teeth of the spline shaft to transmit torque;

[0018] The connecting plate is fixedly connected to the step surface arranged inside the inner gear sleeve, and the outer end surface of the connecting plate is an arc surface; the second washer and the second bolt are installed on the connecting plate and then connected to the external equipment; the outer circle of one end of the top block is fixed to the inner hole of the outer gear sleeve through interference fitting, and the other end is provided with an arc surface connected to the arc surface of the connecting plate to match the internal and external gear compensation angles.

[0019] A further technical solution is that the tooth end sleeve assembly includes a top block 2, a baffle 2, a tooth end sleeve, a bolt 3 and a washer 3, and a bolt 4; the inner hole of the tooth end sleeve is a spline structure, which cooperates with the inner gear ring to transmit torque; the inner spline of the tooth end sleeve is connected to the external equipment; the top block 2 is provided with a threaded hole, which is fastened to the baffle 2 by bolt 4, and is also provided with a concave arc surface which cooperates with the convex arc surface of the top block 3 to realize angle compensation; the baffle 2 is provided with a bolt hole, and is installed on the inner wall step surface of the tooth end sleeve, and the bolt 3 and the washer 3 are connected to the external equipment through the bolt hole of the baffle 2.

[0020] A further technical solution is that the intermediate shaft assembly also includes a water retaining ring, a water retaining pressure cover, a fifth bolt, a fourth gasket, a pressure cover, a combined seal, a metal ring, a lip seal, an adjusting gasket and a slider; the inner hole of the slider is provided with a concave arc surface, which is installed in conjunction with the convex arc surface of the outer gear sleeve to achieve axial positioning and angle compensation; the inner hole and two side surfaces of the metal ring are provided with sealing grooves, and the combined seal and the lip seal can achieve axial and radial bidirectional sealing after being installed on the metal ring, and the metal ring can move up and down to achieve angle compensation; after the slider is installed in conjunction with the outer gear sleeve, the adjusting gasket, the pressure cover, the metal ring with a seal, the water retaining pressure cover, the fifth bolt and the fourth gasket are installed in sequence to finally form a tooth end cavity seal and an angle compensation structure, and the thickness of the gasket is adjusted by grinding to ensure the tightness of the installation, which can effectively prevent water ingress, dust ingress and oil leakage; the inner hole of the water retaining ring is fixed on the spline shaft in conjunction with the position of the water retaining pressure cover to form an external water retaining structure to further enhance the waterproof function, and the metal ring is preferably a copper ring.

[0021] According to a further technical solution, the roller end inner tooth assembly and the roller end outer tooth assembly cooperate with each other through the internal and external teeth to form a roller side lubrication cavity; and the intermediate shaft assembly and the tooth end sleeve assembly are connected to form a tooth end lubrication cavity.

[0022] A further technical solution is that the intermediate shaft assembly also includes a retaining ring 1 fixed to the outer wall of the spline sleeve and a retaining ring 3 fixed to the outer wall of the spline shaft; retaining rings 1, 2 and 3 cooperate with the hydraulic fork to realize the left and right movement of the spline sleeve on the spline shaft while alleviating the pressure loading of the hydraulic fork. The inner holes of retaining rings 1 and 2 are provided with welding grooves, which are installed on the positioning steps of the outer circle of the spline sleeve and then welded to the circumference, and cooperate with the hydraulic fork to realize the left and right movement of the spline sleeve on the spline shaft; retaining ring 3 is provided with bolt holes and welding grooves, which are installed on the positioning outer circle of the spline shaft and then welded to the circumference. When the hydraulic fork is pressurized on retaining ring 2 and needs to keep springs 1 and 2 in a compressed state for a long time, retaining rings 3 and 2 can be fixed by studs and nuts to relieve the pressure loading of the hydraulic fork.

[0023] 3. Beneficial effects:

[0024] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects:

[0025] (1) The main transmission connecting shaft of the seamless tube continuous rolling of the present invention, the inner tooth assembly at the roller end and the outer tooth assembly at the roller end form a roller side lubrication cavity through the cooperation of internal and external teeth, and can realize the transmission of torque and angle swing at the same time; the inner tooth assembly at the roller end and the outer tooth assembly at the roller end are both provided with a top block, and the top block is designed with an arc to cooperate with the internal and external teeth to complete the angle swing; the intermediate shaft assembly includes a spline shaft, a spline sleeve, a spring, a retaining ring, an inner gear ring, an outer gear shaft sleeve, a hydraulic shift fork and a top block, the spline sleeve and the spline shaft can realize the long telescopic function through the cooperation of the internal and external spline clearance, the hydraulic shift fork drives the retaining ring to compress the spring after pressurization, and realizes the shortening of the length of the intermediate shaft assembly, and the spring's own elastic force can reset the length of the intermediate shaft assembly after the hydraulic shift fork is depressurized, the inner hole of the outer gear shaft sleeve and the outer circle of the spline shaft are installed by interference fit and double keys to realize the transmission of torque, the outer gear shaft sleeve and the inner gear ring are matched with internal and external teeth The torque transmission and angle swing are realized by combining, and the top block is designed with an arc to cooperate with the internal and external teeth to complete the angle swing; the intermediate shaft assembly is connected with the tooth end sleeve assembly to form a tooth end lubrication cavity, and the tooth end sleeve assembly is provided with a top block, which is connected with the top block of the intermediate shaft assembly to cooperate with the angle swing of the internal and external teeth; the roller end internal tooth assembly and the roller end external tooth assembly are connected through internal and external teeth, the roller end external tooth assembly and the intermediate shaft assembly are connected with bolts and nuts after the end face teeth are matched, and the intermediate shaft assembly and the tooth end sleeve assembly are connected through hinged holes, bolts and nuts, and finally form a main transmission shaft that can transmit torque, angle compensation, and long-stroke telescopic; the intermediate shaft assembly can realize the length telescopic change of the intermediate shaft assembly through the pressure of the hydraulic fork and the elastic force of the spring, so that the internal and external teeth of the roller end internal tooth assembly and the roller end external tooth assembly can be quickly disengaged and matched, which is convenient for the rapid replacement of the roller end internal tooth assembly;

[0026] (2) The main transmission coupling shaft of the seamless tube continuous rolling of the present invention optimizes the sealing structure of the cavities at both ends, the locking structure of the outer gear sleeve at the tooth end, the spring installation structure, the spline sleeve connection structure, the internal and external positioning structure, and the retaining ring structure, and adds a protective cover structure to ensure that the gear part has sufficient grease and no leakage, and the service life is extended. The spring specifications are increased and the strength is upgraded to ensure the telescopic service life. There is no water or dust ingress into the interior of the intermediate shaft assembly, which reduces the wear and jamming of the spline pair and the spring, and ultimately reduces the customer's maintenance time and labor costs, ensuring that the coupling shaft has a continuous service life of not less than 12 months. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the use state of the main transmission shaft structure of seamless pipe continuous rolling according to a specific embodiment;

[0028] Figure 2 It is a schematic structural diagram of the roller end inner gear assembly of the main transmission shaft of the seamless pipe continuous rolling mill in a specific embodiment;

[0029] Figure 3 It is a schematic structural diagram of the roller end external gear assembly of the main transmission connecting shaft of the seamless pipe continuous rolling mill in a specific embodiment;

[0030] Figure 4 It is a structural schematic diagram of the tooth end sleeve assembly of the main transmission connecting shaft of the seamless pipe continuous rolling according to a specific embodiment;

[0031] Figure 5 It is a schematic structural diagram of the intermediate shaft assembly of the main transmission connecting shaft of the seamless pipe continuous rolling mill in a specific embodiment;

[0032] Figure 6 for Figure 5 A magnified view of part A;

[0033] Figure 7 for Figure 5 Schematic diagram of the three structures of the protective cover;

[0034] Figure 8 for Figure 5 Schematic diagram of the spline sleeve structure.

[0035] In the figure: 100, roller end inner tooth assembly; 200, roller end outer tooth assembly; 300, intermediate shaft assembly; 400, tooth end sleeve assembly; 500, roller side lubrication cavity; 600, tooth end lubrication cavity;

[0036] 1. Bolt 1; 2. Locknut; 3. Sealing ring; 4. Positioning ring; 5. Reaming bolt; 6. Washer 1; 7. Nut 1; 8. Internal gear sleeve; 9. Connecting plate; 10. Snap ring 1; 11. Protective cover 1; 12. Sealing ring 1; 13. Sealing ring 2; 14. Washer 2; 15. Bolt 2; 16. Top block 1; 17. External gear sleeve; 18. Snap ring 2; 19. Baffle 1; 20. Sealing ring 3; 21. Protective cover 2; 22. Screw plug 1; 23. Locking screw; 24. Aluminum block; 25. Top block 2; 26. Baffle 2; 27. Tooth end sleeve; 28. Bolt 3; 29. ​​Washer 3; 30. Bolt 4; 31. splined sleeve; 32, spring one; 33, positioning block one; 34, spring two; 35, splined shaft; 36, retaining ring one; 37, retaining ring two; 38, positioning block two; 39, snap ring three; 40, protective cover three; 41, inner gear ring; 42, outer gear shaft sleeve; 43, locking nut; 44, snap ring four; 45, top block three; 46, water retaining ring; 47, water retaining pressure cover; 48, bolt five; 49, washer four; 50, combined seal; 51, metal ring; 52, lip seal; 53, adjustment gasket; 54, slider; 55, double key; 56, retaining ring three; 57, hydraulic fork; 58, screw plug two; 59, pressure cover; 60, screw plug three;

[0037] 31-1, connecting flange; 31-2, intermediate connecting pipe; 31-3, internal spline sleeve;

[0038] 40-1, pressing plate; 40-2, bolt six; 40-3, washer five; 40-4, asphalt cloth; 40-5, washer six (; 40-6, nut two; 40-7, screw; 40-8, connecting plate; 40-9, bolt seven; 40-10, washer seven. DETAILED DESCRIPTION

[0039] In order to further understand the content of the present invention, the invention is described in detail with reference to the accompanying drawings.

[0040] Example 1

[0041] The main transmission shaft of the seamless tube continuous rolling of this embodiment is as follows: Figure 1 , 5As shown, it includes a roller end inner tooth component 100 and a tooth end shaft sleeve component 400 for connecting external equipment at both ends; it also includes a roller end outer tooth component 200 and an intermediate shaft component 300 connected between the roller end inner tooth component 100 and the tooth end shaft sleeve component 400 to achieve torque transmission and angle compensation. The intermediate shaft component 300 includes a long telescopic spline pair, and the roller end inner tooth component 100 is quickly replaced through the long telescopic spline pair. The long telescopic spline pair includes a spline sleeve 31 and a spline shaft 35 respectively having internal splines and external splines. The internal splines and the external splines are clearance-fitted and slidably connected to form clearance sliding, so that the internal and external teeth of the roller end inner tooth component 100 and the roller end outer tooth component 200 can be quickly disengaged and matched, which is convenient for the rapid replacement of the roller end inner tooth component 100, reduces the coupling shaft jump and the inspection and maintenance time, and improves the continuous service life of the coupling shaft on the machine.

[0042] like Figure 5 As shown, the intermediate shaft assembly 300 also includes a spring 1 32, a positioning block 1 33, a spring 2 34, a retaining ring 2 37, a positioning block 2 38, a retaining ring 39 and a hydraulic fork 57; the left part of the spline shaft 35 is provided with a positioning step and a spring installation outer circle in sequence, and an external spline is provided in the middle; the positioning block 1 33 is installed in the positioning step with interference fit, the spring 1 32 is pressed against the left end of the spline shaft 35 in the spline sleeve 31, and the spring 2 34 is pressed against the positioning block 1 33 and then surrounds the spring installation outer circle to form a stable two-spring installation structure; the retaining ring 2 37 is fixed to the outer wall of the spline sleeve 31, and the hydraulic fork 57 is pressurized on the retaining ring 2 3 7; The compression of the spring 1 32 and the spring 2 34 can realize the rapid disengagement of the inner and outer teeth of the roller end, and the worn inner tooth assembly 100 of the roller end can be replaced in time; the hydraulic fork 57 is pressurized on the retaining ring 2 37 to compress the spring 1 32 and the spring 2 34. After the hydraulic fork 57 is depressurized, the spring 1 32 and the spring 2 34 recover their lengths through their own elastic force, and finally form a spline pair that can be freely extended and retracted; the positioning block 2 38 is installed on the right end of the spline sleeve 31 and fixed with the clamping ring 3 39 to form an internal and external positioning spline sleeve connection structure, which plays an external positioning and guiding role when the spline pair is extended and retracted, reducing the wear and blocking risk of the spline pair.

[0043] like Figure 5 As shown, the intermediate shaft assembly 300 also includes an inner gear ring 41, an outer gear sleeve 42, a hydraulic shift fork 57 and a top block 3 45; the outer circle of the shaft end of the spline shaft 35 is provided with a double keyway, and the double key 55 is installed after interference fit with the outer gear sleeve 42 which is also provided with a double keyway to transmit torque; the outer gear sleeve 42 has double arc-surface external teeth which cooperate with the inner gear ring 41 with internal teeth to form tooth side angle compensation and torque transmission; the top block 3 45 is provided with an arc-surface matching tooth side internal and external tooth angle compensation.

[0044] like Figure 2 As shown, the end inner gear assembly 100 includes an inner gear sleeve 8, a connecting plate 9, a snap ring 10, a protective cover 11, a sealing ring 12, a sealing ring 2 13, a washer 2 14 and a bolt 2 15;

[0045] like Figure 3 As shown, the roller end external gear assembly 200 includes a top block 16, an external gear sleeve 17, a snap ring 18, a baffle 19, a sealing ring 3 20, a protective cover 21, a screw plug 1 22, a locking screw 23 and an aluminum block 24;

[0046] The inner teeth of the inner gear sleeve 8 are matched with the outer teeth of the left end portion of the outer gear shaft sleeve 17, and the right end of the outer gear shaft sleeve 17 is provided with end face teeth that cooperate with the end face teeth of the spline shaft 31 to transmit torque; after the sealing ring 12 is installed in the sealing groove of the inner gear sleeve 8, the protective cover 11 cooperates with the inner gear sleeve 8 to compress the sealing ring 12, and finally the retaining ring 10 is installed on the inner gear sleeve 8 to fix the protective cover 11, and finally an external waterproof and dustproof protective cover is formed; after the sealing ring 13 is installed on the connecting plate 9, it is connected to the inner gear sleeve 8 as a whole to form an internal waterproof, dustproof and oil leakage-proof structure.

[0047] The connecting disk 9 is fixedly connected to the step surface set inside the internal gear sleeve 8, and the outer end surface of the connecting disk 9 is an arc surface; the washer 2 14 and the bolt 2 15 are installed on the connecting disk 9 and then connected to the external equipment; the outer circle of one end of the top block 16 is fixed to the inner hole of the external gear sleeve 17 through interference fitting, and the other end is provided with an arc surface connected to the arc surface of the connecting disk 9 to match the internal and external gear compensation angles.

[0048] One end of the external gear sleeve 17 is provided with external teeth, and the end face of the external teeth is provided with a guide angle to quickly cooperate with the internal teeth of the internal gear sleeve 8. The other end is provided with end face teeth to cooperate with the end face teeth of the spline shaft 31 to transmit torque. The inner hole of the protective cover 21 is threaded and has a locking threaded hole, which is fastened with the external thread of the external gear sleeve 17 and pressed against the end face of the bolt 1. After the aluminum block 24 is placed in the locking threaded hole, the locking screw 23 is screwed in to tighten it, forming a tooth end external gear sleeve locking structure, which can prevent the bolt 1 from falling off during long-term operation of the shaft connection; the protective cover 21 is also provided with a retaining ring groove and a large screw plug hole. After the sealing ring 3 20 is installed on the protective cover 21, the baffle 19 and the retaining ring 2 18 are installed in sequence to form an external waterproof, dustproof and oil leakage proof structure; the sealing ring 3 20 cooperates with the outer arc surface of the inner tooth of the internal gear sleeve 8 to continuously seal during the internal and external tooth angle compensation process; one end of the screw plug 1 22 is designed with a large thread, and the other end is designed with a refueling nozzle. After being installed on the protective cover 21, the roller side cavity tooth part can be lubricated through the refueling nozzle. After the screw plug 1 22 is removed, the screw plug hole of the protective cover 21 can be used as a grease observation hole and a drainage hole.

[0049] like Figure 4As shown, the tooth end sleeve assembly 400 includes a top block 25, a baffle 26, a tooth end sleeve 27, a bolt 3 28, a washer 3 29, and a bolt 4 30; the inner hole of the tooth end sleeve 27 is a spline structure, which cooperates with the inner gear ring 41 to transmit torque; the internal spline of the tooth end sleeve 27 is connected to external equipment; the top block 25 is provided with a threaded hole, which is fastened to the baffle 26 by the bolt 4 30, and is also provided with a concave arc surface which cooperates with the convex arc surface of the top block 3 45 to realize angle compensation; the baffle 26 is provided with a bolt hole, and is installed on the inner wall step surface of the tooth end sleeve 27, and the bolt 3 28 and the washer 3 29 are connected to external equipment through the bolt hole of the baffle 26.

[0050] The intermediate shaft assembly 300 also includes a water retaining ring 46, a water retaining pressure cover 47, a bolt 58, a gasket 49, a pressure cover 59, a combined seal 50, a metal ring 51, a lip seal 52, an adjustment gasket 53, a slider 54, a double key 55, a second screw plug 58 and a third screw plug 60; the inner hole of the slider 54 is provided with a concave arc surface, which is installed in conjunction with the convex arc surface of the external gear sleeve 42 to achieve axial positioning and angle compensation; the inner hole and two side surfaces of the metal ring 51 are provided with sealing grooves, and the combined seal 50 and the lip seal 52 can be installed on the metal ring 51 to achieve axial and radial bidirectional sealing, and the metal ring 5 1 can be moved up and down to achieve angle compensation; after the slider 54 is installed in conjunction with the external gear sleeve 42, the adjustment gasket 53, the pressure cover 59, the metal ring 51 with seal, the water retaining pressure cover 47, the bolt 548, and the gasket 49 are installed in sequence, and finally a tooth end cavity seal and angle compensation structure is formed. The thickness of the gasket 53 is adjusted by grinding to ensure the tightness of the installation, which can effectively prevent water ingress, dust ingress and oil leakage; the inner hole of the water retaining ring 46 is combined with the position of the water retaining pressure cover 47 to be fixed on the spline shaft 35 to form an external water retaining structure, which further enhances the waterproof function. The metal ring 51 is preferably a copper ring.

[0051] like Figure 1 As shown, the roller end inner tooth assembly 100 and the roller end outer tooth assembly 200 form a roller side lubrication cavity 500 through the cooperation of internal and external teeth; the roller end outer tooth assembly 200 and the intermediate shaft assembly 300 are installed and fastened by the end face teeth after being cooperated, and the sealing ring 3 outside the end face teeth is cooperated to prevent water and impurities from corroding the end face teeth; the positioning ring 4 is set inside the end face teeth to prevent the vibration caused by the operation of the shaft connection from causing the bolt 1 and the anti-loosening nut 2 to be sheared off or broken; the intermediate shaft assembly 300 and the tooth end sleeve assembly 400 are connected by the hinged hole bolt 5, the washer 6, and the nut 7 to form a tooth end lubrication cavity 600, and each cavity is filled with lithium-based lubricant to reduce the wear of the internal and external teeth, thereby ensuring torque transmission and angle compensation.

[0052] The intermediate shaft assembly 300 also includes a retaining ring 1 36 fixed to the outer wall of the spline sleeve 31 and a retaining ring 3 56 fixed to the outer wall of the spline shaft 35; retaining ring 1 36, retaining ring 2 37 and retaining ring 3 56 cooperate with the hydraulic fork 57 to realize the left and right movement of the spline sleeve 31 on the spline shaft 35, and can also relieve the pressure loading of the hydraulic fork 57. The inner holes of retaining ring 1 36 and retaining ring 2 37 are provided with welding grooves, and the circumference is welded after being installed on the positioning step of the outer circle of the spline sleeve 31, and the spline sleeve 31 is moved left and right on the spline shaft 35 in cooperation with the hydraulic fork 57; retaining ring 3 56 is provided with bolt holes and welding grooves, and the circumference is welded after being installed on the positioning outer circle of the spline shaft 35. When the hydraulic fork 57 is pressurized on retaining ring 2 37 and needs to make spring 1 32 and spring 2 34 in a compressed state for a long time, retaining ring 3 56 and retaining ring 2 37 can be fixed by studs and nuts to relieve the pressure loading of the hydraulic fork 57.

[0053] The roller end inner tooth assembly 100, the roller end outer tooth assembly 200, the intermediate shaft assembly 300, and the tooth end sleeve assembly 400 are connected to finally form a main transmission shaft capable of transmitting torque, angle compensation, and long-stroke telescopic operation.

[0054] The seamless tube continuous rolling main transmission coupling shaft of this embodiment optimizes the sealing structure of the cavities at both ends, the locking structure of the outer gear sleeve at the tooth end, the spring installation structure, the spline sleeve connection structure, the internal and external positioning structure, and the retaining ring structure, and adds a protective cover structure to ensure that the tooth part has sufficient grease and no leakage, and the service life is extended. The spring specifications are increased and the strength is upgraded to ensure the telescopic service life. No water or dust enters the interior of the intermediate shaft assembly, which reduces the wear and jamming of the spline pair and the spring, and ultimately reduces the customer's maintenance time and labor costs, ensuring that the coupling shaft has a continuous service life of not less than 12 months.

[0055] Example 2

[0056] The main transmission shaft of the seamless tube continuous rolling of this embodiment is a further refinement of the basic structure of the embodiment 1: Figure 1 , 5 As shown in , 6, the intermediate shaft assembly 300 includes a positioning block 33, a retaining ring 36, a positioning block 38, a retaining ring 39, a protective cover 40, a retaining ring 36, a locking nut 43, a retaining ring 44, a water retaining ring 46, a water retaining pressure cover 47, a bolt 58, a gasket 49, a pressure cover 59, a combined seal 50, a copper ring 51, a lip seal 52, an adjusting gasket 53, a slider 54, a double key 55, a screw plug 2 58, and a screw plug 3 60.

[0057] like Figure 1 , 5As shown in Figures 8 and 9, the spline sleeve 31 includes a connecting flange 31-1, an intermediate pipe 31-2, and an internal spline sleeve 31-3; one end of the connecting flange 31-1 is provided with an end face tooth connected to the external gear sleeve 17 to transmit torque, and one end is provided with a welding groove; both ends of the intermediate pipe 31-2 are provided with welding grooves; one end of the internal spline sleeve 31-3 is provided with a welding groove, and one end is provided with an internal spline, and a screw plug hole is provided at the front end of the internal spline, and a screw plug 58 can be installed to lubricate the spline pair and the spring, and a snap ring groove is provided at the rear end, and a positioning step is provided on the outer circle; The connecting flange 31-1, the intermediate pipe 31-2, and the inner spline sleeve 31-3 are aligned and then welded to form a spline sleeve 31. The positioning block 38 is made of copper alloy to increase wear resistance. It is fixed with a clamping ring 39 after being installed on the spline sleeve 31. It plays an external positioning and guiding role when the spline pair is extended and retracted, reducing the wear and blocking risk of the spline pair. The inner holes of the retaining ring 1 36 and the retaining ring 2 37 are both provided with welding grooves. After being installed on the positioning step of the outer circle of the spline sleeve 31, the circumference is welded to form a spline sleeve 31. The hydraulic fork 57 is combined to realize the left and right movement of the spline sleeve 31 on the spline shaft 35; one end of the spline shaft 35 is provided with a positioning step and a spring installation outer circle, a long external spline is provided in the middle, and the other end is provided with a positioning step, a double keyway, a locking external thread, a snap ring groove and a positioning inner hole; the spring 1 32 and the spring 2 34 are made of manganese silicon alloy steel and a large steel wire diameter to maximize the strength in an effective space; the outer circle of the positioning block 1 33 is designed with an arc, and is interference-mounted on the outer circle of the positioning step of the spline shaft 35, and is connected with the spring 1 32 and the spring 2 34 forms an internal compression and rebound structure, and the positioning block 1 33 plays an internal positioning and guiding role, reducing the wear and jamming risk of the spring and spline pair; the retaining ring 3 56 is provided with bolt holes and welding grooves, and is installed on the spline shaft 35 to position the outer circle and then welded to the circumference. When the hydraulic fork 57 is pressurized on the retaining ring 2 37 and the spring 1 32 and the spring 2 34 need to be in a compressed state for a long time, the retaining ring 3 56 and the retaining ring 2 37 can be fixed by studs and nuts to relieve the pressure loading of the hydraulic fork 57.

[0058] like Figure 1 , 5As shown in Figure 7, the protective cover 3 40 includes a pressure plate 40-1, a bolt 6 40-2, a washer 5 40-3, an asphalt cloth 40-4, a washer 6 40-5, a nut 2 40-6, a screw 40-7, a connecting plate 40-8, a bolt 7 40-9, and a washer 7 40-10. The asphalt cloth 40-4 is bonded to the pressure plate 40-1 and the connecting plate 40-8 with a strong glue and then fastened with a washer 6 40-5, a nut 2 40-6, and a screw 40-7. The spline sleeve 31 is installed by bolt 6 40-2 and washer 5 40-3, and the other end is installed on retaining ring 3 56 by bolt 7 40-9 and washer 7 40-10, which plays a waterproof and dustproof role for the spline pair and increases the service life of the spline pair; the locking nut 43 is provided with an internal thread, which is installed on the external thread of the spline shaft 35 and then fixed with a snap ring 4 44, which solves the problem of loosening and falling off of the external gear sleeve 42 during the long-term operation of the connecting shaft; the slider 54 is selected Copper alloy material is used to enhance wear resistance, and a concave arc surface is provided on the inner hole, which can be installed in conjunction with the convex arc surface of the outer gear sleeve 42 to achieve axial positioning and angle compensation; copper ring 51 is made of copper alloy material to enhance wear resistance, and sealing grooves are provided on the inner hole and both sides. After the combined seal 50 and the lip seal 52 are installed on the copper ring 51, axial and radial bidirectional sealing can be achieved, and the copper ring 51 can be moved up and down to achieve angle compensation; after the slider 54 is matched with the outer gear sleeve 42, the adjustment gasket 53, the pressure cover 59, the copper ring 51 with seal, the water retaining pressure cover 47, the bolt five 48, and the gasket four 49 are installed in sequence, and finally a tooth end cavity sealing and angle compensation structure is formed. The thickness of the gasket 53 is adjusted by grinding to ensure the tightness of the installation, which can effectively prevent water ingress, dust ingress and oil leakage; the inner hole of the water retaining ring 46 is provided with a welding groove, and combined with the position of the water retaining pressure cover 47, it is welded to the spline shaft 35 to form an external water retaining structure, which further enhances the waterproof function.

[0059] The tooth end sleeve assembly 400 includes a top block 25, a baffle 26, a tooth end sleeve 27, a bolt 3 28, a washer 3 29, and a bolt 4 30; the flange of the tooth end sleeve 27 is provided with a reamed hole and a concave stop, and the inner hole is a spline structure, and the torque is transmitted by connecting with the inner gear ring 41 through the reamed hole bolt 5, the washer 1 6, and the nut 1 7. At the same time, the small clearance between the concave stop of the flange of the tooth end sleeve 27 and the convex stop of the inner gear ring 41 can prevent the reamed hole bolt from loosening and falling off due to vibration and shearing during the operation of the shaft connection; the internal spline of the tooth end sleeve 27 is connected to the external equipment; the top block 25 is provided with a threaded hole, which is fastened to the baffle 26 by the bolt 4 30, and at the same time, a concave arc surface is provided to cooperate with the convex arc surface of the top block 3 45 to realize angle compensation; the baffle 26 is provided with a bolt hole and installed on the tooth end sleeve 27, and the bolt 3 28 and the washer 3 29 are connected to the external equipment through the bolt hole of the baffle 26.

[0060] The roller side lubrication cavity 500 is surrounded by an inner gear sleeve 8, a connecting plate 9, a top block 16, an outer gear sleeve 17, a sealing ring 3 20, a protective cover 21 and a screw plug 1 22 to form a cavity sealing structure with two end cavities. The inner gear sleeve 8 and the outer gear sleeve 17 can transmit torque, angle compensation and quick installation; the sealing ring 3 20 can seal the cavity grease to ensure the lubrication of the teeth; the screw plug 1 22 can be used for lubricating the cavity, observing the grease status and draining water.

[0061] The pressure fork 57 applies pressure to the retaining ring 37 to compress the spring 1 32 and the spring 2 34, so that the inner and outer teeth of the roller end can be quickly disengaged, and the worn inner tooth assembly A of the roller end can be replaced in time; after the hydraulic fork 57 is relieved of pressure, the spring 1 32 and the spring 2 34 can restore their lengths through their own elastic force, so that the inner and outer teeth of the roller end can be quickly matched; when the spring 1 32 and the spring 2 34 are used for a long time and exceed the warranty period, the elastic force is insufficient and stuck, and the hydraulic fork 57 can also be used to apply pressure to the retaining ring 1 36 to reset the spring, temporarily satisfying the matching of the inner and outer teeth, reducing Maintenance frequency and time; positioning block 1 33 and positioning block 2 38 reduce spring and spline pair wear and jamming through internal and external positioning, ensure shaft connection stability and increase service life; spring 1 32, spring 2 34 and spline shaft 35 adopt external installation design, and maximize the steel wire design in the effective space to ensure elastic strength and increase the telescopic service life; the sealing cover 40 adopts asphalt cloth 40-4 structure, which can be compressed and stretched, and can effectively prevent external water vapor and dust from corroding the spline pair, thereby increasing the service life of the spline pair.

[0062] The tooth end lubrication cavity 600 is surrounded by the inner gear ring 41, the outer gear sleeve 42, the top block three 45, the top block two 25, the tooth end sleeve 27 and the screw plug three 60 to form a cavity sealing structure with two end cavities, and then sealed. The inner gear ring 41 and the outer gear sleeve 42 can transmit torque and angle compensation; the top block three 45 and the top block two 25 adopt a concave and convex arc design to achieve angle compensation; the screw plug three 60 can provide oil for the cavity to ensure lubrication of the teeth; the inner gear ring 41 and the tooth end sleeve 27 adopt a concave and convex stop design and are connected through the hinged hole bolt 5, the washer one 6, and the nut one 7 to achieve torque transmission.

[0063] In the seamless tube continuous rolling main transmission shaft of this embodiment, the roller end inner tooth assembly 100 and the roller end outer tooth assembly 200 form a roller side lubrication cavity 500 through the cooperation of internal and external teeth, and can realize the transmission of torque and angle swing at the same time; the roller end inner tooth assembly 100 and the roller end outer tooth assembly 200 are both provided with a top block, and the top block is designed with an arc to cooperate with the internal and external teeth to complete the angle swing; the spline sleeve 31 and the spline shaft 35 of the intermediate shaft assembly 300 can realize the long telescopic function through the cooperation of the internal and external spline clearance, and the hydraulic fork 57 is pressurized. The retaining ring is driven to compress the spring, so that the length of the intermediate shaft assembly 300 is shortened. After the hydraulic fork 57 is depressurized, the spring's own elastic force can reset the length of the intermediate shaft assembly 300. The inner hole of the outer gear sleeve 42 and the outer circle of the spline shaft 35 are installed through interference fit and double keys 55 to achieve torque transmission. The outer gear sleeve 42 and the inner gear ring 41 achieve torque transmission and angle swing through the internal and external teeth. The top block is designed with an arc to cooperate with the internal and external teeth to complete the angle swing; the intermediate shaft assembly 300 and the tooth end sleeve assembly 400 After connection, a tooth end lubrication cavity 600 is formed, and the tooth end sleeve assembly 400 is provided with a top block, which is connected to the top block of the intermediate shaft assembly 300 to cooperate with the angle swing of the inner and outer teeth; the roller end inner tooth assembly 100 and the roller end outer tooth assembly 200 are connected by internal and external teeth, the roller end outer tooth assembly 200 and the intermediate shaft assembly 300 are connected by bolts and nuts after the end face teeth cooperate, and the intermediate shaft assembly 300 and the tooth end sleeve assembly 400 are connected by bolts and nuts through hinged holes, and finally a main transmission shaft that can transmit torque, angle compensation, and long-stroke telescopic is formed; the intermediate shaft assembly 300 can realize the length telescopic change of the intermediate shaft assembly 300 through the pressure of the hydraulic fork 57 and the spring elastic force, so that the inner and outer teeth of the roller end inner tooth assembly 100 and the roller end outer tooth assembly 200 can be quickly disengaged and matched, which is convenient for the rapid replacement of the roller end inner tooth assembly 100, and can reduce the shaft vibration through the synergistic effect of angle compensation while realizing torque transmission, so as to achieve the effect of increasing the continuous service life of the shaft and reducing the overhaul and maintenance time.

[0064] The above schematically describes the present invention and its implementation methods, which are not restrictive. The drawings show only one implementation method of the present invention, and the actual structure and manufacturing steps are not limited thereto. Therefore, if a person skilled in the art is inspired by it and, without departing from the purpose of the invention, designs a structure and an implementation method similar to the technical solution without creativity, they shall all fall within the protection scope of the present invention.

Claims

1. A main transmission shaft for seamless tube continuous rolling, comprising a roller end internal gear assembly (100) and a gear end sleeve assembly (400) for connecting external equipment at both ends; characterized in that: It also includes a roller end outer tooth component (200) and an intermediate shaft component (300) which are connected between the roller end inner tooth component (100) and the tooth end shaft sleeve component (400) to achieve torque transmission and angle compensation.

2. The main transmission shaft for continuous rolling of seamless pipe according to claim 1, characterized in that: The intermediate shaft assembly (300) comprises a long telescopic spline pair, and the roller end internal tooth assembly (100) is quickly replaced through the long telescopic spline pair.

3. The main transmission shaft for continuous rolling of seamless pipe according to claim 2, characterized in that: The long telescopic spline pair comprises a spline sleeve (31) and a spline shaft (35) respectively having an inner spline and an outer spline, and the inner spline and the outer spline are connected in a sliding manner by clearance fit.

4. The main transmission shaft for continuous rolling of seamless pipe according to claim 3, characterized in that: The intermediate shaft assembly (300) further comprises a spring 1 (32), a positioning block 1 (33), a spring 2 (34), a retaining ring 2 (37), a positioning block 2 (38), a retaining ring 3 (39) and a hydraulic shift fork (57); a positioning step and a spring mounting outer circle are sequentially arranged on the left portion of the spline shaft (35), and an external spline is arranged in the middle; the positioning block 1 (33) is interference-mounted on the positioning step, the spring 1 (32) is pressed against the left end of the spline shaft (35) in the spline sleeve (31), and the spring 2 (34) is pressed against the positioning block 1 (33) and then surrounds the spring mounting outer circle; the retaining ring 2 (37) is fixed to the outer wall of the spline sleeve (31), and the hydraulic shift fork (57) is pressurized on the retaining ring 2 (37); the positioning block 2 (38) is installed on the right end of the spline sleeve (31) and then fixed by the retaining ring 3 (39).

5. The main transmission shaft for continuous rolling of seamless pipe according to claim 4, characterized in that: The intermediate shaft assembly (300) further comprises an inner gear ring (41), an outer gear shaft sleeve (42), a hydraulic shift fork (57) and a top block three (45); the outer circle of the shaft end of the spline shaft (35) is provided with a double keyway, and after interference fit with the outer gear shaft sleeve (42) which is also provided with a double keyway, the double key (55) is installed to transmit torque; the outer gear shaft sleeve (42) has double arc surface external teeth which cooperate with the inner gear ring (41) provided with internal teeth to form tooth side angle compensation and torque transmission; the top block three (45) is provided with arc surface matching tooth side internal and external tooth angle compensation.

6. The main transmission shaft for continuous rolling of seamless pipe according to claim 4, characterized in that: The roller end internal gear assembly (100) comprises an internal gear sleeve (8), a connecting plate (9), a second washer (14) and a second bolt (15); The roller end external tooth assembly (200) comprises a top block (16) and an external tooth shaft sleeve (17); The inner teeth of the inner gear sleeve (8) are matched with the outer teeth of the left end of the outer gear sleeve (17), and the right end of the outer gear sleeve (17) is provided with end face teeth that match with the end face teeth of the spline shaft (31) to transmit torque; The connecting plate (9) is fixedly connected to the step surface provided inside the inner gear sleeve (8), and the outer end surface of the connecting plate (9) is an arc surface; the second washer (14) and the second bolt (15) are installed on the connecting plate (9) and then connected to the external equipment; the outer circle of one end of the top block (16) is fixed to the inner hole of the outer gear sleeve (17) through interference fitting, and the other end is provided with an arc surface connected to the arc surface of the connecting plate (9) to match the internal and external gear compensation angles.

7. The main transmission shaft for continuous rolling of seamless pipe according to claim 4, characterized in that: The tooth end sleeve assembly (400) comprises a top block 2 (25), a baffle 2 (26), a tooth end sleeve (27), a bolt 3 (28), a washer 3 (29) and a bolt 4 (30); the inner hole of the tooth end sleeve (27) is a spline structure, which cooperates with the inner gear ring (41) to transmit torque; the inner spline of the tooth end sleeve (27) is connected to an external device; the top block 2 (25) is provided with a threaded hole, which is fastened to the baffle 2 (26) by the bolt 4 (30), and is provided with a concave arc surface to cooperate with the convex arc surface of the top block 3 (45) to achieve angle compensation; the baffle 2 (26) is provided with a bolt hole, and is installed on the inner wall step surface of the tooth end sleeve (27), and the bolt 3 (28) and the washer 3 (29) are connected to the external device through the bolt hole of the baffle 2 (26).

8. The main transmission shaft for continuous rolling of seamless pipe according to claim 4, characterized in that: The intermediate shaft assembly (300) further comprises a water retaining ring (46), a water retaining pressure cover (47), a bolt (48), a gasket (49), a pressure cover (59), a combined seal (50), a metal ring (51), a lip seal (52), an adjustment gasket (53) and a slider (54); the inner hole of the slider (54) is provided with a concave arc surface, which is mounted in cooperation with the convex arc surface of the external gear sleeve (42); the inner hole and two side surfaces of the metal ring (51) are provided with sealing grooves, and the combined seal (50) and the lip seal (5 2) installed on the metal ring (51), and the metal ring (51) can move up and down to achieve angle compensation; after the slider (54) is installed in conjunction with the external gear sleeve (42), the adjustment gasket (53), the pressure cover (59), the metal ring with a seal (51), the water retaining pressure cover (47), the bolt five (48) and the gasket four (49) are installed in sequence; the inner hole of the water retaining ring (46) is fixed on the spline shaft (35) in combination with the position of the water retaining pressure cover (47) to form an external water retaining structure.

9. The main transmission shaft for continuous rolling of seamless pipe according to claim 4, characterized in that: The roller end inner tooth assembly (100) and the roller end outer tooth assembly (200) cooperate with each other through the internal and external teeth to form a roller side lubrication cavity (500); and the intermediate shaft assembly (300) is connected with the tooth end sleeve assembly (400) to form a tooth end lubrication cavity (600).

10. The main transmission shaft for continuous rolling of seamless pipe according to any one of claims 4 to 9, characterized in that: The intermediate shaft assembly (300) further comprises a retaining ring 1 (36) fixed to the outer wall of the spline sleeve (31) and a retaining ring 3 (56) fixed to the outer wall of the spline shaft (35); the retaining ring 1 (36), the retaining ring 2 (37) and the retaining ring 3 (56) cooperate with the hydraulic shift fork (57) to realize the left-right movement of the spline sleeve (31) on the spline shaft (35) while relieving the pressure loading of the hydraulic shift fork (57).

Images