Intermediate bearing assembly of driving shaft array

Abstract

The invention relates to the technical field of motor vehicle driving shaft equipment, and discloses a middle bearing assembly of a driving shaft row, the middle bearing assembly comprises a bearing assembly, the bearing assembly comprises a fixed outer ring, end covers and a multi-directional damping device clamped between the two end covers, the multi-directional damping device comprises a bearing plate sliding in a crack between the two end covers, and the bearing plate is provided with a plurality of through holes. A bearing is arranged in the center of the bearing plate, at least four damping feet which are evenly distributed in the circumferential direction are arranged on the edge of the bearing plate, any damping foot comprises an outer spring and an arc-shaped plate, the two ends of the outer spring are connected with the bearing plate and the arc-shaped plate respectively, and the outer side of the arc-shaped plate is attached to the circular inner wall of the fixed outer ring and freely slides. And the problems that in the prior art, the damping effect is poor, the service life of a damping device is short, and a sealing structure is prone to being eroded are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of motor vehicle drive shaft equipment, and specifically to an intermediate bearing assembly for a drive shaft train. Background Art

[0002] In today's industrial and transportation fields, drive shaft trains, as key power transmission components, are widely used in automobiles, trains, ships, and heavy machinery equipment on various industrial production lines.

[0003] Traditional intermediate bearing assemblies mainly focus on basic support functions, and their structural designs are relatively crude. In terms of shock absorption, conventional bearings only rely on their limited internal clearances and simple rubber gaskets to buffer part of the vibration. This single method can only cope with low-intensity and single-direction vibrations. When facing the multi-dimensional and high-intensity complex vibrations of the drive shaft train in actual operation from the axial, radial, and tangential directions, the shock absorption effect is minimal. The resulting intense vibrations not only generate harsh noises, interfering with the surrounding environment of the equipment, but also accelerate the wear of various components of the bearing due to resonance effects, resulting in an increase in clearance, loss of precision, and a significant reduction in the service life of the bearing. Frequent repairs and replacements greatly increase the equipment operation and maintenance costs and downtime, seriously affecting production efficiency.

[0004] Sealing performance is also a major shortcoming of traditional intermediate bearing assemblies. Most existing designs use simple oil seal structures. The sealing lip materials are ordinary and the fitting accuracy is poor. In harsh environments such as dusty industrial workshops, muddy construction sites, or humid ship engine rooms, external dust, sediment, and sewage can easily break through the oil seal defense and invade the bearing interior. Impurity particles will scratch the surfaces of the raceway and rolling elements, damaging the integrity of the lubricating oil film; the intrusion of moisture causes rust, corroding the metal components of the bearing, further weakening the bearing's load-bearing capacity and rotational accuracy, and directly causing the bearing to seize in severe cases, triggering transmission failures of the entire drive shaft train and endangering the safe operation of the equipment.

[0005] In addition, lightweight design has become a key consideration in the research and development of mechanical components. Old-fashioned intermediate bearing assemblies generally use thick metal materials to ensure sufficient strength, with bulky and redundant structures. This not only increases the self-weight of the drive shaft train, causing additional energy consumption and reducing the overall energy efficiency of the equipment, but also limits the flexibility of the mechanical equipment in layout design, and is not conducive to the construction of compact and integrated mechanical structures.

[0006] For example, an intermediate bearing for a drive shaft train with a patent publication number of CN107532651B and an automotive drive shaft support bearing with a patent publication number of CN109751329A cannot simultaneously solve the above three problems regarding shock absorption, sealing, and lightweight.

[0007] In summary, the existing intermediate bearing assemblies for drive shaft series supports can no longer meet the diverse requirements of modern industry and transportation for equipment efficiency, stability, long life, energy conservation, and environmental protection. Developing a new type of intermediate bearing assembly that integrates all-round shock absorption, efficient sealing, and lightweight advantages has become an urgent task to overcome the current technical problems of drive shaft series and promote the high-quality development of related industries. Summary of the Invention

[0008] (I) Technical Problems to be Solved In view of the deficiencies of the prior art, the present invention provides an intermediate bearing assembly for a drive shaft series, which has the advantages of all-round shock absorption, efficient sealing, and lightweight, and solves the problems of poor shock absorption effect, short service life of shock absorption devices, and easy erosion of the sealing structure in the prior art.

[0009] (II) Technical Solutions To achieve the above object, the present invention provides the following technical solutions: An intermediate bearing assembly for a drive shaft series includes a bearing assembly. The bearing assembly includes a fixed outer ring, end covers, and a multi-directional shock absorption device sandwiched between two end covers. The multi-directional shock absorption device includes a bearing plate that slides in the gap between two end covers. A bearing is provided at the center of the bearing plate, and at least four shock absorption feet are evenly distributed in a circumferential direction at the edge of the bearing plate. Any one of the shock absorption feet includes an outer spring and an arc plate. The two ends of the outer spring are respectively connected to the bearing plate and the arc plate, and the outer side of the arc plate is in free sliding contact with the inner wall of the fixed outer ring; When the bearing plate moves in any direction along the drive shaft, in addition to the shock absorption feet in that direction being compressed and deformed to provide elasticity, the shock absorption feet on both sides perpendicular to that direction will also move with the movement of the bearing plate. During the movement of the side shock absorption feet, they are compressed and deformed due to the narrowing of the space, so that multiple shock absorption feet provide elastic force at the same time, avoiding excessive stress on a single shock absorption foot and resulting in fatigue.

[0010] Preferably, the outer spring is connected to the arc plate through a middle plate. One side of the middle plate is fixedly connected to the outer spring, and the other side is rotatably connected to the arc plate, so that when the shock absorption foot slides around the inner wall of the fixed outer ring, the arc plate always fits on the inner wall; A positioning post is further provided on the side of the middle plate close to the outer spring. The positioning post includes a sliding rod and a sleeve that slides outside the sliding rod. The ends of the sliding rod and the sleeve away from each other are respectively fixed on the middle plate, so that the shock absorption foot can expand and contract under pressure while maintaining synchronous sliding with the bearing plate.

[0011] Preferably, a plurality of end - cover side holes evenly distributed in a circle are provided at the edge of any end - cover, and a plurality of outer - ring side holes evenly distributed in a circle are provided at the edge of the fixed outer - ring. The bearing assembly further includes fixed slide rods. Both ends of each fixed slide rod are fixed in two symmetric end - cover side holes, and the middle part is slidably connected in the outer - ring side holes. A spring is provided between the end - cover and the fixed outer - ring. An inwardly protruding support platform is provided on the inner side of the end - cover close to the fixed outer - ring. The space formed between two symmetric support platforms is a sliding space. The multi - directional shock - absorbing device is located in the sliding space. When the drive shaft swings axially, the two end - covers move along with the movement of the drive shaft, and elastic shock absorption is provided by the spring between the end - cover and the fixed outer - ring.

[0012] Preferably, a table groove is provided at the edge position of the support platform, and both sides of the arc - shaped plate are stuck and slide in the two table grooves.

[0013] Preferably, a through - hole is provided at the center of the end - cover. The diameter of the through - hole is larger than the diameter of the drive shaft. A sealing device is provided in the through - hole of the end - cover. The sealing device includes two parts: a hard outer sealing disc and a soft inner sealing disc. The outer sealing disc is arranged on the outer side far from the fixed outer - ring, and the inner sealing disc is arranged on the inner side close to the fixed outer - ring. The outer sealing disc on the outer side reduces the erosion of the outer environment, and the double - layer protection improves the sealing effect. The inner sealing disc on the inner side reduces the overall weight of the device.

[0014] Preferably, a detachable and fixed gland is provided on the outer side of the end - cover far from the fixed outer - ring. The outer side of the outer sealing disc far from the drive shaft is inserted and slides in the gap between the gland and the end - cover body, and the other side fits on the surface of the drive shaft and is fixedly connected with the inner sealing disc. The cross - section of the inner sealing disc is L - shaped, and the inner sealing disc is divided into a fitting section and a telescopic section. The end of the fitting section of the inner sealing disc is fixed on the outer sealing disc, the main part of the fitting section fits on the surface of the drive shaft, and a clamp is provided on the outer side of the fitting section. The main part of the telescopic section of the inner sealing disc is set as a telescopic bent - wave shape, and the end of the telescopic section of the inner sealing disc is connected to the end - cover.

[0015] Preferably, a fatigue monitoring device is provided in the end - cover. The fatigue monitoring device includes a monitoring module, a signal transmission module, a power supply module, and a starting module. The monitoring module is at least four sensors evenly arranged in a circle in the gap between the gland and the end - cover. When the drive shaft is at the center of the bearing assembly, the sensors are located at the positions not covered by the outer sealing disc. The starting module is connected to the circuit of the drive motor of the drive shaft, and controls the power supply module to start when it detects that the drive shaft is closed. The signal transmission module is used to convert the signals generated by the outer sealing disk covering sensor into electrical signals and transmit them into the alarm. When the alarm receives the electrical signals, it gives an alarm. The power supply module provides power for the monitoring module and the signal transmission module.

[0016] Preferably, a sealing ring is arranged in the gap between the gland and the end cover.

[0017] Preferably, the inner sealing disk is made of rubber and the outer sealing disk is made of stainless steel.

[0018] (III) Beneficial effects Compared with the prior art, the present invention provides an intermediate bearing assembly for a drive shaft train, having the following beneficial effects: 1. For this intermediate bearing assembly of the drive shaft train, by wrapping a bearing outside the drive shaft, the bearing is fixed at the center of the bearing plate, four shock-absorbing feet are arranged on the outer circumference of the bearing plate, and an arc-shaped plate is arranged outside the shock-absorbing feet. The arc-shaped plate slides on the circular inner wall of the fixed outer ring. When the drive shaft swings in a certain direction, the shock-absorbing feet in this direction are squeezed to provide elasticity for shock absorption. At the same time, the shock-absorbing feet on both sides will move along with the movement of the bearing plate. At this time, the arc-shaped plate slides around the circumference in the fixed outer ring along with the movement of the shock-absorbing feet. When the drive shaft swings, the bearing plate deviates from the center of the fixed outer ring, so that the space of the shock-absorbing feet on both sides is reduced, thereby squeezing the shock-absorbing feet on both sides at the same time. Therefore, by arranging four shock-absorbing feet to slide in the circular fixed outer ring and provide elasticity at the same time, elastic shock absorption can be provided when the drive shaft swings in any direction, and multiple shock-absorbing feet can provide elastic force at the same time, avoiding fatigue caused by a single shock-absorbing foot being stressed alone, prolonging the service life. At the same time, the rotatable multi-directional shock-absorbing device can avoid premature fatigue of the shock-absorbing feet in the direction where the force is often applied.

[0019] 2. For this intermediate bearing assembly of the drive shaft train, by setting the end cover to be slidably connected to the fixed outer ring, the two end covers are fixed at a certain distance by the fixed sliding rods arranged in a circle. When the drive shaft undergoes axial displacement, the end cover can drive the multi-directional shock-absorbing device to move along with the drive shaft. At the same time, the spring arranged between the end cover and the fixed outer ring can also provide elastic force for shock absorption, further improving the shock-absorbing ability of the device in various situations.

[0020] 3. For this intermediate bearing assembly of the drive shaft train, by arranging a sealing device on the end cover, the sealing device includes an outer sealing disk with a hard outer layer and an inner sealing disk with a soft inner layer. The outer sealing disk on the outside reduces the erosion effect of the outside environment, and the double-layer protection improves the sealing effect. The inner sealing disk on the inside reduces the overall weight of the device.

[0021] 4. The intermediate bearing assembly of the drive shaft series is provided with a fatigue monitoring device inside the end cover. By detecting the position of the outer sealing disc in the stationary state, the fatigue degree of the inner and outer springs of the shock-absorbing feet is judged. When the outer sealing disc deviates in the stationary state, it indicates that the drive shaft is not located at the exact center of the bearing assembly, thereby determining that the shock-absorbing feet need to be replaced. Description of the Drawings

[0022] Figure 1 It is a schematic structural diagram of the present invention installed on the drive shaft series.

[0023] Figure 2 It is a schematic structural diagram of the present invention.

[0024] Figure 3 It is an exploded view of the present invention.

[0025] Figure 4 It is a schematic structural diagram of the fixed outer ring of the present invention.

[0026] Figure 5 It is a schematic structural diagram of the multi-directional shock-absorbing device of the present invention.

[0027] Figure 6 It is a schematic structural diagram of the end cover of the present invention.

[0028] Figure 7 It is an exploded view of the end cover of the present invention.

[0029] Figure 8 It is a schematic structural diagram of the sealing device of the present invention.

[0030] Figure 9 It is a schematic structural diagram of the multi-directional shock-absorbing device installed inside the fixed outer ring of the present invention.

[0031] Figure 10 It is a sectional view of the present invention.

[0032] Figure 11 For the present invention Figure 10 Partial enlarged view of the sealing device part in it.

[0033] In the figure: 1. Drive shaft; 2. Universal joint; 3. Bearing assembly; 31. Fixed outer ring; 32. End cover; 33. Multi-directional shock-absorbing device; 34. Fixed slide bar; 311. Mounting seat; 313. Outer ring side hole; 321. End cover side hole; 322. Support platform; 323. Table groove; 324. Sealing device; 325. Gland; 326. Sealing ring; 3241. Outer sealing disc; 3242. Inner sealing disc; 3243. Clamp; 331. Bearing; 332. Bearing plate; 333. Shock-absorbing foot; 3331. Outer spring; 3332. Middle plate; 3333. Arc plate; 3334. Positioning column. Detailed Description of the Invention

[0034] Next, in combination with the accompanying drawings in the embodiments of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0035] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0036] In addition, a fixed connection means that after the parts or components are fixed, there is no relative movement; a transmission connection means a connection method that transmits mechanical motion or torque to other working components through transmission parts; a sliding connection means a connection method in which two objects are in contact but not fixed and can slide relative to each other; a rotational connection means a connection method in which two objects are in contact but not fixed and can rotate relative to each other.

[0037] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality" means two or more unless otherwise specifically defined.

[0038] Embodiment 1: This embodiment provides an intermediate bearing assembly for a drive shaft train, having the following technical features.

[0039] Please refer to Figures 1-11 , an intermediate bearing assembly for a drive shaft train, including a bearing assembly 3. The bearing assembly 3 includes a fixed outer ring 31, end covers 32, and a multi-directional shock-absorbing device 33 sandwiched between the two end covers 32. The multi-directional shock-absorbing device 33 includes a bearing plate 332 that slides in the gap between the two end covers 32. A bearing 331 is provided at the center of the bearing plate 332. At least four shock-absorbing feet 333 are evenly distributed in a circumferential manner at the edge of the bearing plate 332. Any one of the shock-absorbing feet 333 includes an outer spring 3331 and an arc-shaped plate 3333. The two ends of the outer spring 3331 are respectively connected to the bearing plate 332 and the arc-shaped plate 3333. The outer side of the arc-shaped plate 3333 is in contact with and freely slides on the circular inner wall of the fixed outer ring 31; When the bearing plate 332 moves in any direction along with the drive shaft 1, in addition to the shock-absorbing feet 333 in this direction being compressed and deformed to provide elasticity, the shock-absorbing feet 333 on both sides perpendicular to this direction will also move along with the movement of the bearing plate 332. During the movement of the shock-absorbing feet 333 on the side, they are compressed and deformed due to the narrowing of the space, so that multiple shock-absorbing feet 333 provide elastic force simultaneously, avoiding excessive stress on a single shock-absorbing foot 333 and resulting in fatigue.

[0040] In an alternative embodiment, the outer spring 3331 is connected to the arc plate 3333 through the middle plate 3332. One side of the middle plate 3332 is fixedly connected to the outer spring 3331, and the other side is rotatably connected to the arc plate 3333. Thus, when the shock-absorbing foot 333 slides around the inner wall of the fixed outer ring 31, the arc plate 3333 always fits on the inner wall. On the side of the middle plate 3332 close to the outer spring 3331, a positioning post 3334 is further provided. The positioning post 3334 includes a slide bar and a sleeve sleeved on the outside of the slide bar and sliding. The ends of the slide bar and the sleeve away from each other are respectively fixed on the middle plate 3332 and the middle plate 3332, so that the shock-absorbing foot 333 can expand and contract under pressure while keeping synchronous sliding with the bearing plate 332.

[0041] In an alternative embodiment, a plurality of end cap side holes 321 evenly distributed in a circle are provided at the edge of any end cap 32, and a plurality of outer ring side holes 313 evenly distributed in a circle are provided at the edge of the fixed outer ring 31. The bearing assembly 3 further includes fixed slide bars 34. Both ends of each fixed slide bar 34 are fixed in two symmetric end cap side holes 321, and the middle is slidably connected in the outer ring side hole 313. A spring is provided between the end cap 32 and the fixed outer ring 31. On the inner side of the end cap 32 close to the fixed outer ring 31, an inwardly protruding support platform 322 is provided. The space formed between two symmetric support platforms 322 is a sliding space. The multi-directional shock-absorbing device 33 is located in the sliding space. When the drive shaft 1 swings along the axial direction, the two end caps 32 move along with the movement of the drive shaft 1, and elastic shock absorption is provided by the spring between the end cap 32 and the fixed outer ring 31.

[0042] In an alternative embodiment, a table groove 323 is provided at the edge position of the support platform 322, and both sides of the arc plate 3333 are clamped and slide in the two table grooves 323.

[0043] In an alternative embodiment, a through hole is provided at the center of the end cap 32, the diameter of the through hole being larger than the diameter of the drive shaft 1. A sealing device 324 is provided in the through hole of the end cap 32. The sealing device 324 includes two parts, a hard outer sealing disc 3241 and a soft inner sealing disc 3242. The outer sealing disc 3241 is arranged on the outer side away from the fixed outer ring 31, and the inner sealing disc 3242 is arranged on the inner side close to the fixed outer ring 31. The outer sealing disc 3241 on the outer side reduces the erosion effect of the outer environment, and the double-layer protection improves the sealing effect. The inner sealing disc 3242 on the inner side reduces the overall weight of the device.

[0044] In an alternative embodiment, a gland 325 fixed by bolts is provided on the outer side of the end cap 32 away from the fixed outer ring 31. The outer side of the outer sealing disc 3241 away from the drive shaft 1 is inserted into the gap between the gland 325 and the main body of the end cap 32 and slides therein, and the other side is attached to the surface of the drive shaft 1 and fixedly connected to the inner sealing disc 3242. The cross section of the inner sealing disc 3242 is L-shaped, and the inner sealing disc 3242 is divided into a fitting section and a telescopic section; The end of the fitting section of the inner sealing disc 3242 is fixed to the outer sealing disc 3241, the main part of the fitting section is attached to the surface of the drive shaft 1, and a clamp 3243 is provided on the outer side of the fitting section; The main part of the telescopic section of the inner sealing disc 3242 is arranged in a telescopic bent wavy shape, and the end of the telescopic section of the inner sealing disc 3242 is fixed to the end cap 32.

[0045] In an alternative embodiment, a fatigue monitoring device is provided in the end cap 32. The fatigue monitoring device includes a monitoring module, a signal transmission module, a power supply module, and a start module; The monitoring module is at least four sensors evenly arranged in a circumferential manner in the gap between the gland 325 and the end cap 32. When the drive shaft 1 is located at the center of the bearing assembly 3, the sensors are located at positions not covered by the outer sealing disc 3241; The start module is connected to the circuit of the drive motor of the drive shaft 1 and controls the power supply module to start when it detects that the drive shaft 1 is turned off; The signal transmission module is used to convert the signal generated when the outer sealing disc 3241 covers the sensor into an electrical signal and transmit it to the alarm. When the alarm receives the electrical signal, it issues an alarm; The power supply module provides power for the monitoring module and the signal transmission module.

[0046] In an alternative embodiment, a sealing ring 326 is provided in the gap between the gland 325 and the end cap 32.

[0047] In an alternative embodiment, the material of the inner sealing disc 3242 is rubber, and the material of the outer sealing disc 3241 is stainless steel.

[0048] The main body part of the fitting section of the inner sealing disc 3242 fits on the surface of the drive shaft 1, that is, the sealing device 324 will not rotate with the rotation of the drive shaft 1. At this time, the end of the telescopic section of the inner sealing disc 3242 is fixed inside the end cover 32.

[0049] The signal transmission module can be wired transmission or wireless Bluetooth transmission.

[0050] A battery is provided inside the power module, which charges the battery through the power supply line when the drive motor starts, and provides power for the monitoring module and the signal transmission module when the drive motor is turned off.

[0051] The sensor inside the monitoring module can be an infrared sensor, which is used to detect whether the outer sealing disc 3241 is covered.

[0052] The material of the inner sealing disc 3242 can be rubber, plastic or other soft sealing diaphragm materials, and the material of the outer sealing disc 3241 can be stainless steel or other corrosion-resistant hard sealing disc materials.

[0053] Detachable inserts are provided on the bearing plate 332 at the position where it is connected to the outer spring 3331. The outer spring 3331 is fixed on the inserts, and the inserts are fixed on the bearing plate 332 by bolts and screws, so as to facilitate the replacement and disassembly of the shock-absorbing feet 333.

[0054] The bearing plate 332 is an equilateral polygon or a circle.

[0055] An installation seat 311 is provided on the fixed outer ring 31, and the bearing assembly 3 is fixed on the vehicle through the installation seat 311.

[0056] The drive shaft column includes a plurality of drive shafts 1, and the drive shafts 1 are connected to each other by universal joints 2.

[0057] Grooves are provided on the surface of the drive shaft 1 corresponding to the bearings 331 and the side holes 321 of the end cover, so that the drive shaft 1 drives the multi-directional shock-absorbing device 33 and the end cover 32 to move when swinging axially.

[0058] In summary, for the intermediate bearing assembly of this drive shaft series, by wrapping the bearing 331 outside the drive shaft 1, the bearing 331 is fixed at the center of the bearing plate 332. Four shock-absorbing feet 333 are arranged on the outer circumference of the bearing plate 332, and an arc-shaped plate 3333 is arranged outside the shock-absorbing feet 333. The arc-shaped plate 3333 slides on the circular inner wall of the fixed outer ring 31. When the drive shaft 1 swings in a certain direction, the shock-absorbing feet 333 in that direction are squeezed to provide elasticity for shock absorption. At the same time, the shock-absorbing feet 333 on both sides will move along with the movement of the bearing plate 332. At this time, the arc-shaped plate 3333 slides around the circumference in the fixed outer ring 31 along with the movement of the shock-absorbing feet 333. When the drive shaft 1 swings, the bearing plate 332 deviates from the center of the fixed outer ring 31, so that the space of the shock-absorbing feet 333 on both sides is reduced, thereby squeezing the shock-absorbing feet 333 on both sides at the same time. Therefore, by setting four shock-absorbing feet 333 to slide in the circular fixed outer ring 31 and provide elasticity at the same time, elastic shock absorption can be provided when the drive shaft 1 swings in any direction, and multiple shock-absorbing feet 333 can provide elastic force at the same time, avoiding fatigue caused by a single shock-absorbing foot 333 being stressed alone and extending the service life.

[0059] For the intermediate bearing assembly of this drive shaft series, by setting the end cover 32 to be slidably connected to the fixed outer ring 31, the two end covers 32 are fixed at a certain distance through the fixed sliding rods 34 arranged in a circle. When the drive shaft 1 has an axial displacement, the end cover 32 can drive the multi-directional shock-absorbing device 33 to move along with the drive shaft 1. At the same time, the spring arranged between the end cover 32 and the fixed outer ring 31 can also provide elastic shock absorption, further improving the shock-absorbing ability of the device in various situations.

[0060] For the intermediate bearing assembly of this drive shaft series, by setting a sealing device 324 on the end cover 32, the sealing device 324 includes an outer sealing disc 3241 with a hard outer side and an inner sealing disc 3242 with a soft inner side. The outer sealing disc 3241 on the outer side reduces the erosion effect of the outer environment, and the double-layer protection improves the sealing effect. The inner sealing disc 3242 on the inner side reduces the overall weight of the device.

[0061] For the intermediate bearing assembly of this drive shaft series, by setting a fatigue monitoring device in the end cover 32, the fatigue degree of the inner and outer springs 3331 of the shock-absorbing feet 333 is judged by detecting the position of the outer sealing disc 3241 in the static state. When the outer sealing disc 3241 deviates in the static state, it indicates that the drive shaft 1 is not in the exact center position of the bearing assembly 3, so as to judge that the shock-absorbing feet 333 need to be replaced.

[0062] It should be noted that, in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the phrase "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the said element.

[0063] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An intermediate bearing assembly of a drive shaft train, comprising a bearing assembly (3), characterized in that: The bearing assembly (3) comprises a fixed outer ring (31), an end cover (32), and a multi-directional shock absorbing device (33) sandwiched between the two end covers (32); The multi-directional shock absorbing device (33) comprises a bearing plate (332) sliding in the gap between the two end covers (32), a bearing (331) being arranged at the center of the bearing plate (332), and at least four shock absorbing feet (333) evenly distributed around the circumference being arranged at the edge of the bearing plate (332); Any shock-absorbing foot (333) comprises an outer spring (3331) and an arc-shaped plate (3333), the two ends of the outer spring (3331) are respectively connected to the bearing plate (332) and the arc-shaped plate (3333), and the outer side of the arc-shaped plate (3333) is fitted on the circular inner wall of the fixed outer ring (31) and slides freely.

2. An intermediate bearing assembly for a drive shaft train according to claim 1, characterized in that: The outer spring (3331) is connected to the arc plate (3333) via the middle plate (3332); one side of the middle plate (3332) is fixedly connected to the outer spring (3331) and the other side is rotatably connected to the arc plate (3333), so that when the shock-absorbing foot (333) slides around the inner wall of the fixed outer ring (31), the arc plate (3333) always fits against the inner wall; A positioning column (3334) is also provided on one side of the middle plate (3332) close to the outer spring (3331). The positioning column (3334) includes a sliding rod and a sleeve sleeved on the outer side of the sliding rod for sliding. The ends of the sliding rod and the sleeve that are away from each other are respectively fixed on the middle plate (3332) and the middle plate (3332), so that the shock-absorbing foot (333) can be extended and retracted when subjected to pressure while maintaining synchronous sliding with the bearing plate (332).

3. The intermediate bearing assembly of a drive shaft train according to claim 2, characterized in that: The edge of any end cover (32) is provided with a plurality of end cover side holes (321) evenly distributed around the circumference, and the edge of the fixed outer ring (31) is provided with a plurality of outer ring side holes (313) evenly distributed around the circumference; The bearing assembly (3) further comprises fixed slide bars (34), each fixed slide bar (34) having two ends fixed in two symmetrical end cover side holes (321) and a middle slidably connected in an outer ring side hole (313), and a spring is provided between the end cover (32) and the fixed outer ring (31); An inwardly protruding support platform (322) is provided on the inner side of the end cover (32) close to the fixed outer ring (31); a space formed between two symmetrical support platforms (322) is a sliding space; the multi-directional shock absorbing device (33) is located in the sliding space; when the drive shaft (1) swings along the axial direction, the two end covers (32) move along with the drive shaft (1), and elastic shock absorption is provided by the spring between the end cover (32) and the fixed outer ring (31).

4. The intermediate bearing assembly of a drive shaft train according to claim 3, characterized in that: The edge of the support platform (322) is provided with a platform groove (323), and the two sides of the arc-shaped plate (3333) are clamped in the two platform grooves (323) to slide.

5. The intermediate bearing assembly of a drive shaft train according to claim 2, characterized in that: A through hole is provided at the center of the end cover (32), the diameter of the through hole being larger than the diameter of the drive shaft (1), and a sealing device (324) is provided in the through hole of the end cover (32); The sealing device (324) comprises two parts, namely a hard outer sealing disk (3241) and a soft inner sealing disk (3242). The outer sealing disk (3241) is arranged on the outside away from the fixed outer ring (31), and the inner sealing disk (3242) is arranged on the inside close to the fixed outer ring (31). The outer sealing disk (3241) on the outside reduces the erosion effect of the outside environment, and the double-layer protection improves the sealing effect. The inner sealing disk (3242) on the inside reduces the overall weight of the device.

6. An intermediate bearing assembly for a drive shaft train according to claim 5, characterized in that: A detachably fixed gland (325) is provided on the outer side of the end cover (32) away from the fixed outer ring (31); an outer sealing disc (3241) is inserted into the gap between the gland (325) and the main body of the end cover (32) away from the outer side of the drive shaft (1) to slide; the other side of the outer sealing disc (3241) is attached to the surface of the drive shaft (1) and is fixedly connected to an inner sealing disc (3242); the cross section of the inner sealing disc (3242) is L-shaped; and the inner sealing disc (3242) is divided into an attached section and a telescopic section; The end of the fitting section of the inner sealing disk (3242) is fixed to the outer sealing disk (3241), the main body of the fitting section fits on the surface of the drive shaft (1), and a clamp (3243) is arranged on the outside of the fitting section; The main body of the telescopic section of the inner sealing disc (3242) is arranged in a telescopic, folded wave shape, and the end of the telescopic section of the inner sealing disc (3242) is connected to the end cover (32).

7. An intermediate bearing assembly for a drive shaft train according to claim 6, characterized in that: A fatigue monitoring device is arranged in the end cover (32), and the fatigue monitoring device comprises a monitoring module, a signal transmission module, a power supply module and a starting module; The monitoring module is at least four sensors evenly arranged in a circumference in the gap between the gland (325) and the end cover (32), and when the drive shaft (1) is located at the center of the bearing assembly (3), the sensors are located at positions not covered by the outer sealing disk (3241); The starting module is connected to the circuit of the driving motor of the driving shaft (1), and controls the power supply module to start when it is detected that the driving shaft (1) is closed; The signal transmission module is used to convert the signal generated by the outer sealing disk (3241) covering the sensor into an electrical signal and transmit it to the alarm, and the alarm sounds an alarm when receiving the electrical signal; The power supply module provides power to the monitoring module and the signal transmission module.

8. The intermediate bearing assembly of a drive shaft train according to claim 6, characterized in that: A sealing ring (326) is provided in the gap between the pressure cover (325) and the end cover (32).

9. The intermediate bearing assembly of a drive shaft train according to claim 6, characterized in that: The material of the inner sealing disk (3242) is rubber, and the material of the outer sealing disk (3241) is stainless steel.

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