A wrap-around roll universal coupling

Abstract

The application discloses a kind of universal coupling of helping roll, belong to coupling field;Including roll shaft end joint, one end detachably connected with roll end shaft sleeve;The other end is provided with spline shaft assembly;Motor end joint, one end detachably connected with motor end shaft sleeve, and for connecting motor or speed reducer;The other end is provided with spline sleeve assembly;Spline shaft assembly and spline sleeve assembly are connected by protective cover assembly, and protective cover assembly is installed on spline shaft assembly;The protective cover of roll shaft end joint is installed outside, and the side of protective cover is connected with roll shaft end joint and roll end shaft sleeve;Roll shaft end joint includes cross package, and the length of protective cover covers cross package along the axial direction of spline shaft assembly;Pipe is provided on spline shaft assembly, for extending the distance between spline sleeve assembly and roll shaft end joint;The application solves the technical problem that impurities enter the interior of universal coupling shaft through weak sealing parts, and form abrasion in the motion parts such as spline pair or joint.

Description

Technical Field

[0001] This invention belongs to the field of couplings, and particularly relates to a universal coupling for a winding roller. Background Technology

[0002] Universal joints, due to their unique structure, can meet the torque transmission requirements of angled applications and are widely used in industries such as metallurgy and shipbuilding. In steel rolling production systems, universal joints used in applications such as coiling rollers, frame roller conveyors, and pinch rollers often operate under special conditions involving abundant water, corrosive liquids, and high temperatures. Furthermore, these universal joints need to withstand frequent extension and retraction under high-speed rotation and load, which places even higher demands on their performance.

[0003] Previous designs started with the core components of the universal joint, such as the new spline pair of the auxiliary winding roller connecting shaft in patent CN205918782U, which improves the centering accuracy of the spline pair and can effectively extend the service life of the spline pair; and the new sealing structure of the cross shaft assembly in patent CN206175510U, which can improve the sealing performance of the cross shaft assembly.

[0004] However, in practical applications,

[0005] 1) The complex and harsh environment at the steel rolling mill site may still cause the seals to fail due to high-temperature aging;

[0006] 2) Impurities such as iron oxide scale and dust on site enter the interior of the universal joint through weak sealing parts, causing wear on moving parts such as spline pairs and cross shafts, accelerating component damage, and leading to problems such as abnormal noise, vibration, and loss of telescopic function of the universal joint. Ultimately, the universal joint is damaged and removed from the production line, which has a very large impact on the normal production of steel enterprises. Summary of the Invention

[0007] To address the unique working conditions of the aforementioned coiling roll mill and the shortcomings of existing cross-shaft universal couplings, this invention provides a coiling roll universal coupling. By changing the connection sequence of components, optimizing the component structure, and adjusting the component fit, key components are protected from the effects of harsh environments. Simultaneously, a protective cover is added to enhance the protection of the joints of core components, physically isolating them from harmful environments such as moisture.

[0008] To solve the above problems, the technical solution adopted by the present invention is as follows:

[0009] A universal coupling for a winding roller, comprising:

[0010] The roll shaft end joint has a roll end sleeve detachably connected to one end and is used to connect the roll. The connection method can be key fit, end face tooth or toothed fit, etc.; the other end is provided with a spline shaft assembly.

[0011] The motor end joint has a motor end bushing detachably connected to one end, which is used to connect the motor or reducer; the other end is equipped with a spline sleeve assembly.

[0012] The spline shaft assembly and the spline sleeve assembly are connected by a protective cover assembly, which is mounted on the spline shaft assembly. A protective cover is installed outside the roll shaft end joint, and one side of the protective cover is connected to the roll shaft end joint and the roll end sleeve. The roll shaft end joint includes a cross-shaped package, and the length of the protective cover covers the cross-shaped package along the axial direction of the spline shaft assembly.

[0013] A connecting pipe is provided on the spline shaft assembly to extend the joint distance between the spline sleeve assembly and the end of the roll shaft.

[0014] In a further technical solution, the spline sleeve assembly includes a welding fork and a spline sleeve body, wherein the welding fork and the spline sleeve body are interference-fitted and welded together by inner and outer stops.

[0015] The spline sleeve body has a stepped inner hole and a guide copper ring is installed at the end away from the welding fork. The guide copper ring has an inner groove along the axis of the spline sleeve body. The outer diameter of the guide copper ring is interference-fitted with the stepped inner hole.

[0016] A pressure cap is installed on the side of the guide copper ring opposite to the welding fork, and bolts are evenly distributed and locked to the end of the spline sleeve body to constrain the guide copper ring in the stepped inner hole; the pressure cap and the guide copper ring are coaxially arranged.

[0017] In a further technical solution, the spline shaft assembly includes a spline shaft and a connecting tube. The spline shaft is used to insert into the stepped inner hole and form a meshing connection with the stepped inner hole. A centering ring is provided inside the connecting tube and is interference-fitted with the spline shaft through the centering ring.

[0018] The spline shaft has teeth and a shoulder.

[0019] The end of the connector opposite the spline shaft is interference-fitted and welded with a welding fork.

[0020] In a further technical solution, the protective cover includes a cylindrical portion and a flange ring, wherein the flange ring is coaxially arranged with the cylindrical portion and has multiple sets of circumferentially distributed threaded holes.

[0021] In a further technical solution, the protective cover includes an elastic bending portion, a first closing ring, and a second closing ring; the elastic bending portion is installed between the first closing ring and the second closing ring, and the elastic bending portion is used to extend and retract along the axial direction of the spline shaft assembly; the elastic bending portion is made of glass fiber.

[0022] In a further technical solution, a clamp is installed on the outside of the first closing ring and a clamp is installed on the outside of the second closing ring. Both clamps are used to fix the first closing ring and the second closing ring to the joint at the end of the roll shaft by bolts.

[0023] In a further technical solution, a rotary distributor is installed outside the protective cover, and a cold water ring groove and a return water ring groove are provided inside the rotary distributor; raceways and rolling elements are provided at both ends of the rotary distributor;

[0024] A sealing ring one and a sealing ring two are respectively provided outside the cold water ring tank and the return water ring tank. A stop ring is provided outside the protective cover. The sealing ring one and the sealing ring two are respectively provided on both sides of the stop ring.

[0025] A cold water pipe is installed at the bottom of the cold water annular tank, and cold water is introduced into it;

[0026] A return water pipe is installed at the bottom of the return water ring groove for returning water; a return water pipe is installed on the side of the cold water pipe facing the end joint of the roll shaft.

[0027] In a further technical solution, the protective cover is provided with multiple sets of heat dissipation grooves distributed along the spline shaft axis, and the two ends of the heat dissipation grooves are respectively connected to the cold water ring groove and the return water ring groove.

[0028] The radial height of the cold water ring groove is greater than the radial height of the return water ring groove.

[0029] In a further technical solution, multiple sets of heat dissipation slots are axially distributed inside the protective cover, and gradually decrease in size from the top hole downwards.

[0030] In a further technical solution, the guide copper ring has a first guide hole, and the spline sleeve body has a second guide hole; the first guide hole and the second guide hole are adapted to each other and are distributed radially; the protective cover assembly has an air hole and a vent plug is installed in connection with it; the second guide hole and the air hole are distributed radially; one end of the protective cover assembly is connected to the shoulder, and the other end is connected to the spline sleeve body by installing an O-ring;

[0031] There is a gap between the spline sleeve body and the protective cover assembly, and there is a cavity between the spline sleeve body and the spline shaft shoulder.

[0032] The spline shaft is provided with a tapered inclined surface, and the radial height of the inclined bottom of the tapered inclined surface along the spline shaft is not lower than the root height of the tooth profile on the spline shaft.

[0033] Beneficial effects

[0034] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0035] (1) As a further improvement of the present invention, the coaxiality of each component of the transmission shaft is ensured by structural design such as stop positioning and centering ring matching, reducing the shaking and deviation during transmission, and avoiding the overall stability affected by insufficient universal joint precision.

[0036] (2) As a further improvement of the present invention, in the case of an environment with a lot of dust, water vapor and other impurities at the roll end, a protective cover is set at the joint of the roll end to isolate the joint of the roll end from the physical environment, so as to ensure that the cross shaft assembly can be effectively sealed, so that the bearing can be fully lubricated, thereby extending the service life of the universal joint.

[0037] (3) As a further improvement of the present invention, the protective cover is a metal welded part, which is fixed to the roller end joint through bolt holes evenly distributed on the flange. The joint is placed inside the protective cover, and four through holes are evenly distributed on the outer circle of the protective cover, which are respectively located vertically above the four bearing oiling holes of the joint. The four through holes facilitate the lubrication of the cross-shaped lubricator.

[0038] (4) As a further improvement of the present invention, in view of the environment at the roll end, the spline pair is kept away from the harsh rolling environment at the roll end, and the pipe is connected to the joint at the roll end to avoid dust, iron oxide scale and other impurities from entering the spline pair. The spline teeth are prone to wear and corrosion, loss of centering accuracy, resulting in vibration and other phenomena in the spline pair, thereby affecting the service life of the spline pair.

[0039] (5) As a further improvement of the present invention, the tooth end of the spline sleeve assembly is equipped with a guide copper ring. After the guide copper ring and the spline sleeve are heat-fitted with an interference fit, the inner hole of the guide copper ring and the welding fork bearing hole are machined with the outer circle and the generatrix of the spline sleeve as the reference, so as to ensure the concentricity of all parts of the spline sleeve assembly.

[0040] (6) As a further improvement of the present invention, the guide copper ring and the spline shaft are fitted with a small clearance. The inner hole of the guide copper ring is provided with four semi-circular inner grooves evenly distributed along the circumference of the inner hole, which are used for venting and unloading, so as to avoid the pressure generated when the guide copper ring and the spline shaft reciprocate, which would hinder normal expansion and contraction.

[0041] (7) As a further improvement of the present invention, the cast copper alloy material used in the guide copper ring part contains Sn, Pb and Zn elements, which has wear-resistant properties. At the same time, it has good corrosion resistance in atmospheric medium and a dense oxide film (Cu2O) is easily formed on the surface to prevent further corrosion inside the spline sleeve.

[0042] (8) As a further improvement of the present invention, the spline sleeve assembly is provided with a part cover, which is made to fit tightly against the end face of the spline sleeve by bolts, preventing external dust, iron filings and coolant from entering the spline meshing surface, avoiding tooth surface wear and corrosion; at the same time, it prevents internal grease leakage, ensures the lubrication effect of the spline pair, and extends service life.

[0043] (9) The spline pair described in this invention ensures that the inner cavity of the spline pair has a high air content with a high compression ratio by limiting the amount of oil injected, thereby reducing the resistance to expansion and contraction.

[0044] (10) The present invention adds a rotary distributor to allow cold water to flow into the heat dissipation tank through the cold water ring groove. Multiple sets of heat dissipation tanks provide local cooling for the protective cover and the internal roll end joints. This reduces the probability of seal failure due to high temperature aging and protects the roll end joints from impurities such as iron oxide scale and dust. Secondly, the rotary distributor, through the rolling element, ensures that the protective cover does not rotate relative to the roll end joints when they swing. Furthermore, double-line sealing is achieved through seal one and seal two to ensure that the water in the heat dissipation tank does not flow out, thus achieving a continuous sealed water cooling effect.

[0045] Compared with existing technologies, this invention is more suitable for complex and harsh rolling environments, has a longer shaft life, and a wider range of applications. Attached Figure Description

[0046] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. However, it should be understood that these drawings are designed for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, unless specifically indicated, these drawings are intended only to conceptually illustrate the structural construction described herein and are not necessarily drawn to scale.

[0047] Figure 1 This is a schematic diagram of the overall structure of a universal coupling for a winding roller according to the present invention;

[0048] Figure 2 This is a schematic diagram of the spline sleeve assembly of a universal coupling for a winding roller according to the present invention;

[0049] Figure 3 This is a schematic diagram of the splined shaft assembly of a universal coupling for a winding roller according to the present invention;

[0050] Figure 4 This is a front view of the guide copper ring of the universal coupling for the auxiliary winding roller according to the present invention;

[0051] Figure 5 This is a cross-sectional schematic diagram of the guide copper ring of the universal coupling for the auxiliary winding roller according to the present invention.

[0052] Figure 6 This is a cross-sectional schematic diagram of a protective cover for a universal coupling for a winding roller according to the present invention;

[0053] Figure 7 This is a schematic diagram of the end face of the protective cover of the universal coupling for the auxiliary winding roller according to the present invention;

[0054] Figure 8 This is a schematic diagram of the protective cover structure of Embodiment 2 of the present invention;

[0055] Figure 9 This is a schematic diagram of the roll shaft end joint (including protective cover) structure of Embodiment 3 of the present invention;

[0056] Figure 10 This is a schematic diagram of the structure of the clamp of the present invention;

[0057] Figure 11 This is a schematic diagram of the structure of the protective cover according to Embodiment 4 of the present invention;

[0058] Figure 12 This is a schematic diagram of the end of the protective cover of the present invention;

[0059] Figure 13 yes Figure 12 AA section view;

[0060] Figure 14 yes Figure 13 Enlarged view of part B;

[0061] Figure 15 This is a schematic diagram of the bottom pipe connection of the protective cover of the present invention;

[0062] Figure 16 This is a schematic diagram of the overall structure of another type of universal coupling for the winding roller according to the present invention;

[0063] Figure 17 for Figure 16 Enlarged view of part C.

[0064] Illustration:

[0065] 10. Roll shaft end joint; 11. Cross-shaped joint;

[0066] 20. Roll end bushing;

[0067] 30. Splined shaft assembly; 31. Connector; 32. Splined shaft; 33. Centering ring; 34. Shoulder; 35. Welded fork II; 321. Tapered bevel;

[0068] 40. Motor end joint;

[0069] 50. Motor end bushing;

[0070] 60. Spline sleeve assembly; 61. Welding fork 1; 62. Spline sleeve body; 63. Stepped inner hole; 64. Guide copper ring; 65. Inner groove; 66. Pressure cap;

[0071] 641, Guide Hole 1; 621, Guide Hole 2;

[0072] 70. Protective cover assembly; 71. Vent plug;

[0073] 80. Protective cover; 81. Cylindrical section one; 82. Flange ring; 84. Flexible bending section; 85. Closing ring one; 86. Closing ring two; 87. Clamp one; 88. Clamp two;

[0074] 810. Heat dissipation duct;

[0075] 89. Rotary distributor; 891. Cold water ring groove; 892. Return water ring groove; 893. Rolling element; 894. Sealing ring one; 895. Sealing ring two; 896. Stop ring; 897. Cold water pipe; 898. Return water pipe. Detailed Implementation

[0076] The present invention will now be described in further detail with reference to the accompanying drawings, so that those skilled in the art can have a clearer understanding of it.

[0077] As a first embodiment of the present invention, based on Figure 1-7 The detailed implementation plan is shown below. Figure 2 As shown, a universal coupling for a roll forming aid includes a roll shaft end joint 10, one end of which is detachably connected to a roll end bushing 20 and used for key-fitting the roll; the other end is provided with a splined shaft assembly 30.

[0078] The motor end joint 40 has a motor end bushing 50 detachably connected to one end for connecting a motor or a reducer; the other end is provided with a spline sleeve assembly 60.

[0079] The spline shaft assembly 30 and the spline sleeve assembly 60 are connected by a protective cover assembly 70, which is mounted on the spline shaft assembly 30. A protective cover 80 is installed on the outside of the roll shaft end joint 10, and one side of the protective cover 80 is connected to the roll shaft end joint 10 and the roll end sleeve 20. The roll shaft end joint 10 includes a cross-shaped package 11, and the length of the protective cover 80 covers the cross-shaped package 11 along the axial direction of the spline shaft assembly 30.

[0080] A connecting pipe 31 is provided on the spline shaft assembly 30 to extend the distance between the spline sleeve assembly 60 and the roll shaft end joint 10, enabling long-distance power transmission while avoiding space constraints. The connecting pipe is connected to the roll shaft end joint, keeping the spline pair away from the harsh rolling environment at the roll end and preventing impurities such as dust and iron oxide scale from entering the spline sleeve assembly and spline shaft assembly.

[0081] like Figure 2 The diagram shows a schematic of a spline sleeve assembly. The spline sleeve assembly 60 includes a welding fork 61 and a spline sleeve body 62. The welding fork 61 and the spline sleeve body 62 are connected by an interference fit between inner and outer stops and welded together.

[0082] The spline sleeve body 62 has a stepped inner hole 63 and a guide copper ring 64 is installed at the end away from the welding fork 61. The guide copper ring 64 has an inner groove 65 along the axis of the spline sleeve body 62. The outer diameter of the guide copper ring 64 is interference-fitted with the stepped inner hole 63.

[0083] A pressure cap 66 is installed on the side of the guide copper ring 64 opposite to the welding fork 61, and bolts are evenly installed and locked to the end of the spline sleeve body 62 to constrain the guide copper ring 64 in the stepped inner hole 63; the pressure cap 66 and the guide copper ring 64 are coaxially arranged.

[0084] like Figure 3 As shown, the spline shaft assembly 30 includes a spline shaft 32 and a connecting tube 31. The spline shaft 32 and the spline sleeve 62 are engaged and centered by involute spline teeth. A centering ring 33 is provided inside the connecting tube 31, and the centering ring 33 is interference-fitted with the spline shaft 32. The spline shaft 32 is provided with teeth and a shoulder 34. The coaxiality of each component of the transmission shaft is ensured by the structural design of the stop positioning and the centering ring, reducing the shaking and deviation during the transmission process and avoiding the impact of insufficient universal joint precision on the overall stability.

[0085] The end of the connector 31 facing away from the spline shaft 32 is interference-fitted and welded with a welding fork 35.

[0086] like Figure 6 and 7 The protective cover 80 includes a cylindrical portion 81 and a flange ring 82. The flange ring 82 is coaxially arranged with the cylindrical portion 81 and has multiple sets of circumferentially distributed threaded holes. The protective cover 80 isolates the roller shaft end joint from the physical environment, ensuring effective sealing of the universal joint assembly and sufficient lubrication of the bearings, thereby extending the service life of the universal joint. Four through holes are evenly distributed on the outer circumference of the protective cover, vertically positioned above the four bearing lubrication holes of the joint. The four through holes facilitate lubrication of the universal joint.

[0087] Traditional designs often involve extending the shaft length to reduce wear from high temperatures and impurities. However, in actual production and modifications, not all shafts can be extended. The shaft length is determined by the available installation space; the total length and extension range are specified by the customer when ordering, thus limiting space. Even with a fixed shaft length, conventional structural designs often result in short spline mating sections, leading to ineffective sealing and corrosion / damage to the spline mating sections in harsh environments. This invention adjusts the connection sequence of the spline shaft assembly and spline sleeve assembly, alters the structure of related parts, and incorporates guide copper rings and pressure caps to prevent rapid corrosion in harsh environments.

[0088] Example 2

[0089] like Figure 8 As shown, based on the scheme of Embodiment 1, the protective cover 80 includes an elastic bending part 84, a first closing ring 85, and a second closing ring 86; the elastic bending part 84 is installed between the first closing ring 85 and the second closing ring 86, and the elastic bending part 84 is used to extend and retract along the axial direction of the spline shaft assembly 30; the elastic bending part 84 is made of glass fiber.

[0090] The protective cover is made of carbon steel, which possesses good tensile strength and impact resistance. It can withstand strong external forces such as heavy object impacts, flying iron filings, and high-pressure fluid impacts, maintaining structural integrity over a long period and forming a stable physical barrier for the internal joints to prevent external damage. It also exhibits good high-temperature resistance and aging resistance, with a high surface hardness that resists friction from metal chips and scratches from sharp objects. Even with long-term use, its surface protective performance will not significantly decrease. It facilitates the installation of fasteners (such as bolts, nuts, and hinges) and can be connected to the joint flange with good installation stability. Some metal protective covers can also be designed to be detachable for convenient inspection and maintenance of internal components.

[0091] Example 3

[0092] As a third embodiment of the present invention, based on Figure 9 and 10 Based on Example 1, the protective cover is made of fiberglass. Fiberglass composite material itself does not rust and can withstand the erosion of various corrosive media such as acids, alkalis, oils, and coolants, making it superior to carbon steel protective covers. Fiberglass composite material can be molded into irregular structures through processes such as molding and winding, for example, to create protective covers with openings or localized thickening, precisely matching the outer contour dimensions of the joint. Compared to the welding process of metal protective covers, it is easier to achieve personalized customization. Furthermore, nuts, reinforcing ribs, and other structural components can be directly embedded during molding, simplifying subsequent installation procedures. Fiberglass composite material has good toughness and is not easily deformed or cracked by minor impacts, effectively buffering the impact of external forces on internal equipment. At the same time, its material damping characteristics are superior to metals, reducing the transmission of vibration and noise during operation and lowering the overall noise level of the equipment. The weight of the fiberglass protective cover is significantly lighter than that of a metal protective cover of the same size, which significantly reduces the overall load on the joint shaft, reducing power loss and vibration. The protective cover is fixed to both ends of the joint using clamps and bolts.

[0093] The closing ring 85 is fitted with a clamp 87, and the closing ring 86 is fitted with a clamp 88. Both clamps 87 and 88 are used to fix the closing ring 85 and the closing ring 86 to the roller shaft end joint 10 by bolts.

[0094] When lubrication is needed for the four bearings of the joint, simply loosen the bolts of the clamps at both ends; it's simple and convenient.

[0095] Example 4

[0096] like Figure 11-15 As shown, another embodiment of the present invention is provided. Based on embodiment 1, a rotary distributor 89 is installed outside the protective cover 80. The rotary distributor 89 is provided with a cold water ring groove 891 and a return water ring groove 892. The two ends of the rotary distributor 89 are provided with raceways and rolling elements 893.

[0097] A first sealing ring 894 and a second sealing ring 895 are respectively provided outside the cold water ring groove 891 and the return water ring groove 892. A stop ring 896 is provided outside the protective cover 80. The first sealing ring 894 and the second sealing ring 895 are respectively provided on both sides of the stop ring 896.

[0098] A cold water pipe 897 is installed at the bottom of the cold water annular tank 891, and cold water is introduced into it;

[0099] A return water pipe 898 is provided at the bottom of the return water ring groove 892 for returning water; the return water pipe 898 is provided on the side of the cold water pipe 897 facing the end joint 10 of the roll shaft.

[0100] like Figure 11 and 12 As shown, the protective cover 80 is provided with multiple sets of heat dissipation grooves 810 distributed along the axis of the spline shaft 32. The two ends of the heat dissipation grooves 810 are respectively connected to the cold water ring groove 891 and the return water ring groove 892.

[0101] The radial height of the cold water annular groove 891 is greater than that of the return water annular groove 892. Since the top is relatively close to the hot steel on the surface of the roll, the diameter of the top cold water annular groove is increased.

[0102] Multiple heat dissipation slots 810 are axially distributed within the protective cover 80, and gradually decrease in size from the top hole downwards.

[0103] In use, the rotary distributor is fitted over the protective cover, with its two ends rolling within the raceway via rolling elements. This allows the rotary distributor to remain stationary relative to the roll end joints, while the protective cover rotates synchronously with the roll end joints. A cold water ring groove is incorporated to allow cooling water to flow through when connected to a single heat dissipation tank. Two sets of sealing rings (one and two) are installed on each side of the rotary distributor to form an effective seal. The bottom cold water pipe and return water pipe are externally connected; the cold water pipe can connect to refrigeration equipment, and the return water pipe can connect to the return water tank, which in turn connects to refrigeration equipment for water cooling, creating a circulating system.

[0104] This invention incorporates a rotary distributor that allows cold water to flow through a cold water annular groove into a heat dissipation tank. Multiple heat dissipation tanks provide localized cooling to the protective cover and the internal roll end joints. This reduces the likelihood of seal failure due to high-temperature aging and protects the roll end joints from impurities such as iron oxide scale and dust. Furthermore, the rotary distributor, through its rolling elements, prevents relative rotation of the protective cover as it oscillates with the roll end joints. Double-line sealing, achieved through seals one and two, ensures that water does not leak out of the heat dissipation tanks, resulting in a continuous, sealed water-cooling effect.

[0105] Example 5

[0106] like Figure 16 and 17 As shown, another embodiment of the present invention is provided. Based on embodiment 1, the guide copper ring 64 is provided with a first guide hole 641, and the spline sleeve body 62 is provided with a second guide hole 621. The first guide hole 641 and the second guide hole 621 are adapted to each other and are distributed radially. The protective cover assembly 70 is provided with an air hole and is connected to a vent plug 71. The second guide hole 621 is distributed radially with the air hole. One end of the protective cover assembly 70 is connected to the shoulder 34, and the other end is connected to the spline sleeve body 62 by installing an O-ring.

[0107] There is a gap between the spline sleeve body 62 and the protective cover assembly 70, and there is a cavity between the spline sleeve body 62 and the shoulder 34 of the spline shaft 32.

[0108] The spline shaft 32 is provided with a tapered inclined surface 321, and the radial height of the inclined bottom of the tapered inclined surface 321 along the spline shaft 32 is not lower than the root height of the tooth profile on the spline shaft 32.

[0109] The guide copper ring and the spline shaft are fitted with a small clearance. The inner hole of the guide copper ring is provided with four semi-circular grooves evenly distributed along the circumference of the inner hole. These grooves are used for air venting and load relief to prevent pressure from being generated when the guide copper ring and the spline shaft reciprocate, thus avoiding obstruction of normal expansion and contraction.

Claims

1. A universal coupling for a winding roller, characterized in that, include: The roll shaft end joint (10) has a roll end bushing (20) detachably connected to one end and used to connect the roll; the other end is provided with a spline shaft assembly (30). The motor end joint (40) has a motor end bushing (50) detachably connected to one end and used to connect a motor or a reducer; the other end is provided with a spline sleeve assembly (60). The spline shaft assembly (30) and the spline sleeve assembly (60) are connected by a protective cover assembly (70), which is mounted on the spline shaft assembly (30). A protective cover (80) is installed outside the roll shaft end joint (10), and one side of the protective cover (80) is connected to the roll shaft end joint (10) and the roll end sleeve (20). The roll shaft end joint (10) includes a cross-shaped package (11), and the length of the protective cover (80) covers the cross-shaped package (11) along the axial direction of the spline shaft assembly (30). A connecting pipe (31) is provided on the spline shaft assembly (30) to extend the distance between the spline sleeve assembly (60) and the roll shaft end joint (10), so as to realize long-distance power transmission and space avoidance.

2. The universal coupling for a winding roller according to claim 1, characterized in that, The spline sleeve assembly (60) includes a welding fork (61) and a spline sleeve body (62), and the welding fork (61) and the spline sleeve body (62) are interference-fitted and welded together by inner and outer stops; The spline sleeve body (62) has a stepped inner hole (63) and a guide copper ring (64) is installed at the end away from the welding fork (61). The guide copper ring (64) has an inner groove (65) along the axis of the spline sleeve body (62). The outer diameter of the guide copper ring (64) is interference-fitted with the stepped inner hole (63). A pressure cap (66) is installed on the side of the guide copper ring (64) facing away from the welding fork (61), and bolts are evenly installed and locked to the end of the spline sleeve body (62) to constrain the guide copper ring (64) in the stepped inner hole (63); the pressure cap (66) and the guide copper ring (64) are coaxially arranged.

3. The universal coupling for a winding roller according to claim 2, characterized in that, The spline shaft assembly (30) includes a spline shaft (32) and a connecting tube (31). The spline shaft (32) and the spline sleeve (62) are engaged and centered by involute spline teeth. A centering ring (33) is provided inside the connecting tube (31), and the centering ring (33) is interference-fitted with the spline shaft (32). The spline shaft (32) is provided with teeth, and the spline shaft (32) is also provided with a shoulder (34). The end of the connector (31) facing away from the spline shaft (32) is interference-fitted and welded with a welding fork (35).

4. The universal coupling for a winding roller according to claim 3, characterized in that, The protective cover (80) includes a cylindrical part (81) and a flange ring (82). The flange ring (82) is coaxially arranged with the cylindrical part (81) and has multiple sets of circumferentially distributed threaded holes.

5. A universal coupling for a winding roller according to claim 3, characterized in that, The protective cover (80) includes an elastic bending part (84), a first closing ring (85) and a second closing ring (86); the elastic bending part (84) is installed between the first closing ring (85) and the second closing ring (86), and the elastic bending part (84) is used to extend and retract along the axial direction of the spline shaft assembly (30); the elastic bending part (84) is made of glass fiber.

6. A universal coupling for a winding roller according to claim 5, characterized in that, The first (85) of the closing ring is fitted with a clamp first (87), and the second (86) of the closing ring is fitted with a clamp second (88). The clamp first (87) and the clamp second (88) are used to fix the first (85) and the second (86) of the closing ring to the joint (10) of the roll shaft end by bolts respectively.

7. A universal coupling for a winding roller according to claim 3, characterized in that, A rotary distributor (89) is installed outside the protective cover (80). A cold water ring groove (891) and a return water ring groove (892) are provided inside the rotary distributor (89). Roller tracks and rolling elements (893) are provided at both ends of the rotary distributor (89). A sealing ring one (894) and a sealing ring two (895) are respectively provided outside the cold water ring groove (891) and the return water ring groove (892). A stop ring (896) is provided outside the protective cover (80). The sealing ring one (894) and the sealing ring two (895) are respectively provided on both sides of the stop ring (896). A cold water pipe (897) is installed at the bottom of the cold water annular tank (891) and cold water is introduced into it; A return water pipe (898) is provided at the bottom of the return water ring groove (892) for returning water; a return water pipe (898) is provided on the side of the cold water pipe (897) facing the end joint (10) of the roll shaft.

8. A universal coupling for a winding roller according to claim 7, characterized in that, The protective cover (80) is provided with multiple sets of heat dissipation grooves (810) distributed along the axis of the spline shaft (32), and the two ends of the heat dissipation grooves (810) are respectively connected to the cold water ring groove (891) and the return water ring groove (892). The radial height of the cold water ring groove (891) is greater than the radial height of the return water ring groove (892).

9. A universal coupling for a winding roller according to claim 8, characterized in that, Multiple heat dissipation slots (810) are axially distributed inside the protective cover (80) and gradually decrease in size from the top hole downwards.

10. A universal coupling for a winding roller according to claim 9, characterized in that, The guide copper ring (64) has a guide hole 1 (641), and the spline sleeve body (62) has a guide hole 2 (621); the guide hole 1 (641) and the guide hole 2 (621) are compatible and radially distributed; the protective cover assembly (70) has an air hole and is connected to a vent plug (71); the guide hole 2 (621) and the air hole are radially distributed; one end of the protective cover assembly (70) is connected to the shoulder (34), and the other end is connected to the spline sleeve body (62) by installing an O-ring; The spline sleeve body (62) and the protective cover assembly (70) are provided with a gap, and a cavity is provided between the spline sleeve body (62) and the shoulder (34) of the spline shaft (32); The spline shaft (32) is provided with a tapered inclined surface (321), and the radial height of the inclined bottom of the tapered inclined surface (321) along the spline shaft (32) is not lower than the root height of the tooth profile on the spline shaft (32).

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