Universal joint transmission shaft assembly

Abstract

The invention relates to the technical field of universal joint transmission, in particular to a universal joint transmission shaft assembly which comprises a cross shaft, four bearing sleeves are connected to the cross shaft, roller pins are arranged between the bearing sleeves and the cross shaft, oil seals are installed on one sides of the bearing sleeves and make contact with the surface of the cross shaft, and an oil injection pipeline is arranged in the cross shaft. According to the design, the driving assembly is arranged on the cross shaft, a worker can control the second circular ring to move through the driving assembly, and the second circular ring can pull the oil seal on the side where waste oil is completely discharged so that the oil seal can be better attached to the cross shaft; when oil is injected, waste oil can be discharged from the position between the oil seal on the side with the smaller gap and the cross shaft, so that the amount of fresh oil flowing out of the cross shaft during oil injection is reduced, waste of the fresh oil is avoided, the situation that the waste oil cannot be discharged from the oil seal on the side with the smaller gap is avoided, the lubricating effect is ensured, and the service life is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of universal joint transmission, in particular to a universal joint transmission shaft assembly. Background Art

[0002] Universal joint drive shaft assemblies are generally used in automobiles. By allowing the angle between shafts and axial displacement, the universal joint drive shaft assembly solves the problem that traditional rigid couplings cannot adapt to dynamic movement, ensuring efficient and stable power transmission.

[0003] The cross shaft in the universal joint is usually provided with an oil filling hole. The oil filling hole of the cross shaft is usually located at the end or middle of the shaft neck and is connected to the four needle bearings through an internal oil channel. When oiling the cross shaft, it is necessary to use a grease gun to inject new fresh grease into the oil filling hole. At this time, the new grease will flow into the four needle bearings through the oil channel and squeeze out the original waste oil from the edge of the oil seal or dust cover until the new fresh grease is evenly squeezed out from the edge of the oil seal or dust cover in four directions, indicating that the new grease has been filled. However, due to the different degrees of wear of the oil seals in the four directions during the operation of the universal joint, the gaps between the oil seals and the cross shaft in the four directions will be different. When oiling the cross shaft, the oil seal on the side with the larger gap will completely discharge the waste oil and continue to discharge new grease, which will cause the oil seal on the side with the smaller gap to drain slowly or even be unable to drain. This causes the new oil to be continuously discharged and mixed with the waste oil, resulting in waste. If the waste oil cannot be discharged, the lubrication effect will be reduced, thereby affecting the service life.

[0004] In response to the above problems, the existing technology provides some solutions. For example, patent application number: CN202122897659.X provides a wear-resistant universal joint sleeve with anti-deformation function, including a cross-axis universal joint, and shaft heads are evenly installed on the outside of the cross-axis universal joint, and connecting sleeves are installed on the outside of the shaft heads. The utility model rotates the sealing head, and the sealing head drives the connecting thread to rotate in the thread groove. After the sealing head is removed, the lubricating oil is injected into the oil storage tank through the oil filling port. Part of the lubricating oil is absorbed by the oil storage sponge to slow down the flow rate of the lubricating oil and avoid the waste of uneven distribution of lubricating oil caused by excessive injection at one time. Although this design avoids the waste of uneven distribution of lubricating oil during oil filling, it does not solve the problem of inconsistent discharge speed of waste oil from different oil seals due to the different degrees of wear of the oil seals in the four directions during the oil filling process, and may even fail to completely discharge the waste oil, reducing the lubrication effect and thus affecting the service life. Summary of the Invention

[0005] The purpose of the present invention is to provide a universal joint drive shaft assembly to solve the problem that due to the different degrees of wear of the oil seals in the four directions of the universal joint during operation, when the cross shaft is lubricated, the oil seal on the side with a larger gap will completely discharge the waste oil and continue to discharge new grease, thereby causing the oil seal on the side with a smaller gap to be unable to discharge the waste oil.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A universal joint drive shaft assembly includes a cross shaft, four bearing sleeves are connected to the cross shaft, a needle roller is arranged between the bearing sleeve and the cross shaft, and an oil seal is installed on one side of the bearing sleeve, the oil seal is in contact with the surface of the cross shaft, an oil filling pipe is opened inside the cross shaft, an oil filling nozzle is provided on the cross shaft, and a drive component with a second circular ring is provided on the oil filling nozzle, the number of the second circular rings is four, and the four second circular rings are all slidably connected to the cross shaft, and the four second circular rings are respectively connected to four oil seals, and the drive component is used to control the movement of the second circular ring.

[0008] It is easy to understand that since the wear degree of the oil seals in the four directions of the universal joint is different during operation, the gaps between the oil seals and the cross shafts in the four directions will be different. When the cross shaft is oiled, the oil seal on the side with the larger gap will completely discharge the waste oil and continue to discharge new grease, which will cause the oil seal on the side with the smaller gap to drain the oil slowly or even fail to drain the oil. This causes the new oil to be continuously discharged and mixed with the waste oil, causing waste. If the waste oil cannot be discharged, the cross shaft needs to be further disassembled, which increases the workload and reduces the work efficiency. This design sets a drive component on the cross shaft. When the staff is working on the cross shaft When filling oil, when the oil seal on one side discharges oil slowly or cannot discharge oil, the staff can control the movement of the second ring through the drive component. Since the second ring is connected to the oil seal, the second ring will pull the oil seal on the side that has completely discharged the waste oil to make the oil seal fit better with the cross shaft. At this time, the internal pressure of the cross shaft increases, and the waste oil will be discharged from between the oil seal and the cross shaft on the side with the smaller gap. Therefore, this design reduces the amount of new oil flowing out of the cross shaft during oil filling, avoids the waste of new oil, and also avoids the waste oil from being unable to be discharged from the oil seal on the side with the smaller gap, avoids the staff from further disassembling the cross shaft, and improves work efficiency.

[0009] Preferably, the drive assembly includes a control rod 2, four sliders are arranged around the oil seal, the four sliders are respectively aligned with the four journals on the cross shaft, there is a movable gap between the slider and the oiling nozzle, the movable gaps of the four sliders are consistent, a control rod 1 is hinged on the slider, and the control rod 1 can slide along the hinge, a circular ring 1 is provided on the oiling nozzle, the four control rods 1 around the circular ring 1 are all hinged to the circular ring 1, the number of the control rods 2 is 4, and one end of the four control rods 2 is respectively fixedly connected to the four sliders, and the other end of the four control rods 2 is respectively fixedly connected to the four circular rings 2.

[0010] It is easy to understand that when the staff is oiling the cross shaft, they need to come to the bottom of the car to operate. At this time, due to the narrow space under the car and the complex structure under the car, the staff's movement space is limited. This may cause the staff to be unable to control the drive assembly during the oiling process. The design sets a slider on the cross shaft. When the staff is oiling, the staff will align the nozzle of the oil gun with the oil filling nozzle. At this time, if the staff needs to control the drive assembly, they only need to swing the angle of the oil gun. When one side is oiling slowly or unable to oil, the oil gun is tilted toward that side. At this time, the oil gun will pull ring 1 toward that side. At this time, ring 1 pushes the slider on this side through control rod 1, and the other three sliders will slide toward the oil filling nozzle. The three sliders then pull three control rods 2 respectively. The control rods 2 pull ring 2 to make the oil seal fit better with the cross shaft. At this time, the three oil seals stop oiling, and the oil seal on the side facing the oil gun can start oiling after being subjected to internal pressure. Therefore, this design allows the staff to control the drive assembly by swinging the oil gun, facilitating the staff's operation.

[0011] Preferably, a sealing cover is also provided on the oil nozzle, and the sealing cover is threadedly connected to the cross shaft. The interior of the sealing cover is a hollow structure, and a limiting groove is provided inside the sealing cover. The inner walls on both sides of the limiting groove are fitted with the surfaces on both sides of the slider, and the edges on both sides of the limiting groove are chamfered. A sealing block is also fixedly connected to the interior of the sealing cover, and the sealing block extends to the interior of the oil nozzle, and the edge of the sealing block is fitted with the inner wall of the oil nozzle.

[0012] It is easy to understand that since the slider and the control rod 2 on the drive assembly are components that can move back and forth, when the universal joint is working, the cross shaft will rotate rapidly, and the slider and the control rod 2 will slide on the cross shaft, which may cause the cross shaft to vibrate during operation. In addition, since the ring 2 is connected to the oil seal, when the control rod 2 slides, it will pull the ring 2, and then pull the oil seal 2, thereby increasing the wear of the oil seal 2 and reducing the service life of the oil seal. Therefore, this design opens a limit groove on the sealing cover. When the staff completes the oil filling, the seal When the sealing cover is tightened, the slider around the oil filling nozzle will enter the limiting groove on the sealing cover. At this time, since the slider will fit with the inner wall of the limiting groove, the slider and the control rod 2 cannot move during the operation of the universal joint. A sealing block is also provided on the sealing cover. When the sealing cover is tightened, the sealing block will block the oil filling nozzle, thereby achieving a sealing effect. Therefore, this design can ensure the sealing of the sealing cover while fixing the drive assembly. The structure is simple and compact, which avoids the movement of the slider and the control rod 2 during the operation of the universal joint and improves the stability of the universal joint.

[0013] Preferably, a pressing plate is slidably connected to the slider, and the pressing plate and the slider are elastically connected. One end of the pressing plate extends to the outside of the slider. A rectangular groove 1 is provided on the slider, and a triangular block is hinged in the rectangular groove 1. The hinge between the triangular block and the slider is provided with a torsion spring, and one side of the triangular block is in contact with the pressing plate. Four rectangular grooves 2 are provided on the cross shaft, and the four rectangular grooves 2 are respectively aligned with the four triangular blocks. Ratchets are provided inside the rectangular groove 2, and the triangular block is in contact with the ratchet. The flat surfaces on both sides of the triangular block face the position of the bearing sleeve ring 2.

[0014] It is easy to understand that when the staff is filling oil, they need to apply pressure to the oil gun to keep the gun head in contact with the oil filling nozzle on the cross shaft to prevent the pressure inside the cross shaft from squeezing the lubricating oil out of the oil filling nozzle during the oil filling process. If the staff also needs to use the oil gun to control the drive assembly at this time, it may cause the oil gun to apply insufficient pressure on the oil filling nozzle, which in turn causes the lubricating oil to be squeezed out of the oil filling nozzle, resulting in waste. Therefore, this design connects the pressing plate by sliding on the slider. When the oil gun swings toward the slider on one side, the oil gun will first squeeze the pressing plate downward to contact the triangular block and then push the slider to move. At this time, when the slider moves to the specified position, the staff only needs to maintain the pressing force on the pressing plate. Because one side of the triangular block is restricted by the pressing plate, the slider can only move in the direction away from the oil filling nozzle. Therefore, this design allows the staff to maintain a small force to press the pressing plate to prevent the slider from being pushed by the internal pressure of the cross shaft and causing the slider to slide, allowing the staff to use most of the force to keep the gun head in contact with the cross shaft. Therefore, this design facilitates the staff's operation.

[0015] Preferably, a telescopic rod 1 is provided between the sliders, the telescopic rod 1 is fixedly connected to the cross shaft, the telescopic rod 2 is slidably connected to the telescopic rod 1, the telescopic rod 2 is elastically connected to the telescopic rod 1, and one end of the telescopic rod 2 is provided with a rounded corner.

[0016] It is easy to understand that the design is to set a telescopic rod 1 between the sliders and a telescopic rod 2 slidably connected to the telescopic rod 1. When the staff swings the oil gun to one side, the telescopic rod 2 on both sides of the slider will press against the two sides of the oil gun, making it impossible for the oil gun to swing to both sides, avoiding the oil gun squeezing the two sliders at the same time due to the staff's control error, which may cause the oil seal on the side where the oil filling is completed to continue to discharge oil, thereby causing waste of lubricating oil. Therefore, this design avoids the stability of the staff when operating the oil gun and avoids the oil gun swinging to both sides, causing waste.

[0017] Preferably, a circular ring three is fixedly installed on one side of the oil seal, a claw is fixedly connected to the circular ring two, the claw is connected to the circular ring three, a pressing block is hinged on the circular ring three, a torsion spring is provided at the hinge between the pressing block and the circular ring three, a pressing groove is provided on the oil seal, one end of the pressing block is in contact with the circular ring two, and the other end extends into the inside of the pressing groove and contacts the inner wall of the pressing groove away from the surface of the cross shaft.

[0018] It is easy to understand that this setting hinges a pressing block on the ring three. When the oil gun pushes the slider toward the side away from the oiling nozzle, the other three sliders will move toward the oiling nozzle, causing the ring two to move away from the oil seal. At this time, the claw on the ring two will pull the ring three, causing the ring three to pull the oil seal. At this time, the oil seal is in contact with the cross shaft, and the slider moving away from the oiling nozzle will push the control rod two and then push the ring two. At this time, one side surface of the ring two will contact the pressing block on the ring three. At this time, the pressing block rotates. At this time, the pressing block squeezes the inner wall of the pressing groove away from the surface of the cross shaft. Since the oil seal is made of flexible material, after the inner wall of the pressing groove is squeezed, the oil seal will expand outward. At this time, the gap between the oil seal and the cross shaft increases. Therefore, this design improves the speed of the staff to discharge waste oil when oiling one side of the cross shaft, improves the work efficiency of the staff, and also avoids the risk of the oil seal falling off due to excessive pressure inside the cross shaft squeezing the oil seal due to the inability of the remaining oil seals to be discharged.

[0019] Preferably, a support rod is fixedly connected to the second ring, and both sides of the support rod are in contact with the surface of the cross shaft. An arc groove is provided at one end of the support rod, and a knob is rotatably connected to the cross shaft. Four arc protrusions are fixedly connected to the knob, and the arc protrusions are located inside the arc groove and in contact with the inner wall of the arc groove.

[0020] It is easy to understand that since Ring 2 is a ring and the control rod 2 on one side is perpendicular to the plane formed by the ring, when the universal joint is running, one side of Ring 2 can be supported by the control rod 2, while the other side will shake due to lack of support. This design fixes the support rod on the other side of Ring 2. When the staff is oiling the cross shaft, the staff can turn the knob. At this time, the arc protrusion on the knob will leave the arc groove on the support rod. At this time, the support rod will not restrict the movement of Ring 2. When the staff completes the oiling and turns the knob, the arc protrusion on the knob will re-enter the arc groove on the support rod. At this time, the support rod cannot move and support Ring 2, avoiding the shaking of Ring 2 during the operation of the universal joint and improving the stability of the universal joint.

[0021] Preferably, a connecting protrusion is fixedly connected to the circular ring three, a groove is provided on the connecting protrusion, the claw contacts the inner wall of the groove, and the connection between the connecting protrusion and the circular ring three is located in the middle of the circular ring three.

[0022] It is easy to understand that when the oil gun pushes the slider toward the side away from the oil filling nozzle, the other three sliders will move toward the oil filling nozzle, thereby causing ring two to move away from the oil seal. At this time, the claw on ring two will pull ring three, thereby causing ring three to pull the oil seal. At this time, the oil seal is in fit with the cross shaft. This setting is achieved by providing a connecting protrusion on ring three and opening a groove on the connecting protrusion. When ring two moves, the claw will pull the connecting protrusion and ring three through the connection with the groove, and is fixed to the middle of ring three with the connecting protrusion. Therefore, it avoids the force on ring three being concentrated on one side when being pulled, thereby causing the ring three to be squeezed between the cross shaft or bearing sleeve when moving, thereby affecting the movement of ring three, and also avoids uneven force on the oil seal when being pulled, thereby causing the oil seal to be unable to fit with the cross shaft after moving. Therefore, this design ensures the smoothness of the drive assembly and improves the sealing effect after the oil seal is pulled.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. This design sets a drive component on the cross shaft. The staff can control the movement of the second ring through the drive component. The second ring will pull the oil seal on the side where the waste oil has been completely discharged to make the oil seal fit better with the cross shaft. The waste oil will be discharged from between the oil seal and the cross shaft on the side with the smaller gap. Therefore, this design reduces the amount of new oil flowing out of the cross shaft during oil filling, avoiding the waste of new oil, and also preventing the waste oil from being unable to be discharged from the oil seal on the side with the smaller gap, ensuring the lubrication effect and improving the service life.

[0025] 2. This design sets a slider on the cross axis, so the staff only needs to swing the angle of the oil gun when filling oil. When the oil flow from one side is slow or cannot be discharged, the oil gun is tilted toward that side, and the oil flow from the other three oil seals can be stopped. The oil seal on the side where the oil gun is facing can then discharge oil after being subjected to internal pressure. This design allows the staff to control the drive component by swinging the oil gun, which facilitates the staff's operation.

[0026] 3. This design allows the staff to maintain a small force to press the pressing plate to prevent the slider from being pushed by the internal pressure of the cross shaft and causing the slider to slide. It allows the staff to use most of the force to keep the gun head in contact with the cross shaft, so this design facilitates the staff's operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a structural schematic diagram of a universal joint transmission shaft assembly of the present invention;

[0028] Figure 2 for Figure 1 Schematic diagram of the structure after the middle sealing cover is disassembled;

[0029] Figure 3 This is a structural schematic diagram of the rear side of a universal joint transmission shaft assembly of the present invention;

[0030] Figure 4 for Figure 3 Schematic diagram of the structure after the middle knob is removed;

[0031] Figure 5 It is a structural schematic diagram of the knob of the present invention;

[0032] Figure 6 for Figure 1 Cross-sectional view at AA in the middle;

[0033] Figure 7 for Figure 6 Enlarged view of point B in the middle;

[0034] Figure 8 for Figure 6 Enlarged view of point C in the middle;

[0035] Figure 9 for Figure 2 Enlarged view of point D in the middle.

[0036] In the figure: 1. Cross shaft; 2. Bearing sleeve; 3. Needle roller; 4. Oil seal; 5. Oil filling pipe; 6. Oil filling nozzle; 7. Circular ring 2; 8. Control rod 2; 9. Slider; 10. Control rod 1; 11. Circular ring 1; 12. Sealing cover; 13. Limit groove; 14. Sealing block; 15. Pressing plate; 16. Rectangular groove 1; 17. Triangular block; 18. Ratchet; 19. Telescopic rod 1; 20. Telescopic rod 2; 21. Circular ring 3; 22. Groove; 23. Claw; 24. Pressing block; 25. Support rod; 26. Arc groove; 27. Knob; 28. Arc protrusion; 29. Pressing groove; 30. Rectangular groove 2; 31. Connecting protrusion. DETAILED DESCRIPTION

[0037] The present invention provides a universal joint transmission shaft assembly, and the technical solution is as follows:

[0038] See also Figures 1 to 9 A universal joint transmission shaft assembly includes a cross shaft 1, four bearing sleeves 2 are connected to the cross shaft 1, a needle roller 3 is provided between the bearing sleeve 2 and the cross shaft 1, and an oil seal 4 is installed on one side of the bearing sleeve 2, the oil seal 4 is in contact with the surface of the cross shaft 1, an oil injection pipe 5 is opened inside the cross shaft 1, an oil injection nozzle 6 is provided on the cross shaft 1, and a drive component with a ring 2 7 is provided on the oil injection nozzle 6. The number of rings 2 7 is 4, and the four rings 2 7 are all slidably connected to the cross shaft 1, and the four rings 2 7 are respectively connected to the four oil seals 4. The drive component is used to control the movement of the ring 2 7, and the drive component includes a control Rod 2 8, four sliders 9 are arranged around the oil seal 4, and the four sliders 9 are aligned with the four journals on the cross shaft 1 respectively. There is a movable gap between the slider 9 and the oiling nozzle 6, and the movable gaps of the four sliders 9 are consistent. A control rod 10 is hinged on the slider 9, and the control rod 10 can slide along the hinge. A ring 11 is provided on the oiling nozzle 6, and the four control rods 10 around the ring 11 are hinged to the ring 11. There are 4 control rods 2 8, and one end of the four control rods 2 8 is fixedly connected to the four sliders 9 respectively, and the other end of the four control rods 2 8 is fixedly connected to the four rings 2 7 respectively.

[0039] For further information, see Figures 1 to 9, a sealing cover 12 is also provided on the oil nozzle, and the sealing cover 12 is threadedly connected to the cross shaft 1. The interior of the sealing cover 12 is a hollow structure, and a limiting groove 13 is provided inside the sealing cover 12. The inner walls on both sides of the limiting groove 13 are fitted with the surfaces on both sides of the slider 9, and the edges on both sides of the limiting groove 13 are provided with chamfers. A sealing block 14 is also fixedly connected to the inside of the sealing cover 12, and the sealing block 14 extends to the inside of the oil filling nozzle 6, and the edge of the sealing block 14 fits with the inner wall of the oil filling nozzle 6. A pressing plate 15 is slidably connected to the slider 9, and the pressing plate 15 is elastically connected to the slider 9 One end of the pressing plate 15 extends to the outside of the slider 9. The slider 9 is provided with a rectangular groove 16. A triangular block 17 is hinged in the rectangular groove 16. A torsion spring is provided for the hinge between the triangular block 17 and the slider 9. One side of the triangular block 17 is in contact with the pressing plate 15. Four rectangular grooves 2 30 are provided on the cross shaft 1. The four rectangular grooves 2 30 are aligned with the four triangular blocks 17 respectively. A ratchet 18 is provided inside the rectangular groove 2 30. The triangular block 17 is in contact with the ratchet 18. The flat surfaces on both sides of the triangular block 17 are facing the position of the ring 2 7 of the bearing sleeve 2.

[0040] See also Figures 1 to 9 A telescopic rod 19 is provided between the sliders 9 and the sliders 9. The telescopic rod 19 is fixedly connected to the cross shaft 1. A telescopic rod 20 is slidably connected to the telescopic rod 19. The telescopic rod 20 is elastically connected to the telescopic rod 19. One end of the telescopic rod 20 is provided with a fillet. A circular ring 3 21 is fixedly installed on one side of the oil seal 4. A claw 23 is fixedly connected to the circular ring 27. The claw 23 is connected to the circular ring 3 21. A pressing block 24 is hinged on the circular ring 3 21. A torsion spring is provided at the hinge between the pressing block 24 and the circular ring 3 21. A pressing groove 29 is provided on the oil seal 4. One end of the pressing block 24 contacts the circular ring 27, and the other end extends to the inside of the pressing groove 29 , and contacts the inner wall of the pressing groove 29 away from the surface of the cross shaft 1. The circular ring 2 7 is also fixedly connected to a support rod 25. Both sides of the support rod 25 are in contact with the surface of the cross shaft 1. An arc groove 26 is provided at one end of the support rod 25. A knob 27 is rotatably connected to the cross shaft 1. Four arc protrusions 28 are fixedly connected to the knob 27. The arc protrusions 28 are located inside the arc groove 26 and are in contact with the inner wall of the arc groove 26. A connecting protrusion 31 is fixedly connected to the circular ring 3 21. A groove 22 is provided on the connecting protrusion 31. The claw 23 is in contact with the inner wall of the groove 22. The connection between the connecting protrusion 31 and the circular ring 3 21 is located in the middle of the circular ring 3 21.

[0041] See also Figures 1 to 9When the staff is filling the cross shaft 1 with oil, they first remove the sealing cover 12 from the cross shaft 1. At this time, the slider 9 around the oiling nozzle 6 leaves the limit groove 13 on the sealing cover 12, and the sealing block 14 on the sealing cover 12 also leaves the oiling nozzle 6. At this time, turn the knob 27 on the other side of the cross shaft 1, and the arc protrusion 28 on the knob 27 leaves the arc groove 26 on the control rod. At this time, the staff puts the gun head of the oil gun against the oiling nozzle 6 in a relatively vertical posture and starts to fill the oil. At this time, due to the different degrees of wear of the four oil seals 4, there will be inconsistent oil discharge speeds. In this case, there may be a situation where the oil seal 4 on one side cannot discharge the waste oil. During the oiling process, when the staff is always observing, when the oil seal 4 on one side has started to discharge new oil while the other oil seals 4 are still discharging waste oil, the staff starts to swing the oil gun towards the oil seal 4 on the side that is still discharging waste oil. At this time, the swinging of the oil gun will drive the ring 11 to move along the side of the oil gun groove. At this time, the oil gun will contact and squeeze the slider 9 on this side. At this time, the pressing plate 15 on the slider 9 is squeezed and slides to one side and contacts one end of the triangular block 17. At this time, the slider 9 on this side opens and moves away from the oiling nozzle. 6, and the other three sliders 9 are pulled by the control rod 10 to move toward the oiling nozzle 6. In the process of pushing the slider 9, the slider 9 pushes the control rod 2 8, and the control rod 2 8 further pushes the ring 2 7. One end of the ring 27 squeezes the pressing block 24 on the ring 3 21. The pressing block 24 rotates and squeezes the inner wall of the pressing groove 29. The other three sliders 9 moving toward the oiling nozzle 6 will pull the control rod 2 8 connected thereto, and the control rod 2 8 further pulls the ring 2 7. At this time, the claw 23 on the ring 2 7 squeezes the inner wall of the groove 22 on the ring 3 21, and the oil is pumped. When the circular ring 3 21 is pulled, the circular ring 3 21 pulls the oil seal 4. At this time, the staff stops swinging the oil gun and keeps the oil gun tilted to continue filling oil. At this time, only the oil seal 4 in the tilted direction of the oil gun is discharging waste oil. When the waste oil is completely discharged and new oil is discharged, the above steps are triggered to fill oil to the oil seals 4 on the other two sides that have not yet completely discharged the waste oil. When the inside of the cross shaft 1 is filled with oil, the staff pulls out the oil gun and reinstalls the sealing cover 12 on the cross shaft 1. The knob 27 on the other side of the cross shaft 1 is also turned. At this time, the staff completes the oiling of the cross shaft 1.

[0042] A specific embodiment of the present invention has been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the embodiment described above. For those skilled in the art, various changes, modifications, substitutions, and variations to these embodiments without departing from the principles and ideas of the present invention should still fall within the scope of protection of the present invention.

Claims

1. A universal joint transmission shaft assembly, comprising a cross shaft (1), four bearing sleeves (2) connected to the cross shaft (1), a needle roller (3) provided between the bearing sleeve (2) and the cross shaft (1), an oil seal (4) installed on one side of the bearing sleeve (2), the oil seal (4) in contact with the surface of the cross shaft (1), an oil injection pipe (5) opened inside the cross shaft (1), and an oil injection nozzle (6) provided on the cross shaft (1), characterized in that: The oiling nozzle (6) is provided with a driving assembly having a second circular ring (7). The number of the second circular rings (7) is four. The four second circular rings (7) are all slidably connected to the cross shaft (1), and the four second circular rings (7) are respectively connected to four oil seals (4). The driving assembly is used to control the movement of the second circular ring (7).

2. The universal joint transmission shaft assembly according to claim 1, characterized in that: The driving assembly includes a control rod 2 (8), four sliders (9) are arranged around the oil seal (4), and the four sliders (9) are respectively aligned with the four journals on the cross shaft (1). There is a movable gap between the slider (9) and the oiling nozzle (6), and the movable gaps of the four sliders (9) are consistent. A control rod 1 (10) is hinged on the slider (9), and the control rod 1 (10) can slide along the hinge. A circular ring (11) is arranged on the oiling nozzle (6), and the four control rods 1 (10) around the circular ring (11) are all hinged to the circular ring (11). The number of the control rods 2 (8) is 4, and one end of the four control rods 2 (8) is fixedly connected to the four sliders (9), and the other end of the four control rods 2 (8) is fixedly connected to the four circular rings 2 (7).

3. The universal joint transmission shaft assembly according to claim 2, characterized in that: The oil nozzle is also provided with a sealing cover (12), the sealing cover (12) is threadedly connected to the cross shaft (1), the interior of the sealing cover (12) is a hollow structure, a limiting groove (13) is provided inside the sealing cover (12), both inner walls of the limiting groove (13) are in contact with the surfaces of both sides of the slider (9), and both edges of the limiting groove (13) are chamfered. The interior of the sealing cover (12) is also fixedly connected with a sealing block (14), the sealing block (14) extends to the interior of the oil injection nozzle (6), and the edge of the sealing block (14) is in contact with the inner wall of the oil injection nozzle (6).

4. The universal joint transmission shaft assembly according to claim 2, characterized in that: The slider (9) is slidably connected with a pressing plate (15), the pressing plate (15) and the slider (9) are elastically connected, one end of the pressing plate (15) extends to the outside of the slider (9), the slider (9) is provided with a rectangular groove (16), a triangular block (17) is hinged in the rectangular groove (16), a torsion spring is provided at the connection between the triangular block (17) and the slider (9), one side of the triangular block (17) contacts the pressing plate (15), the cross shaft (1) is provided with four rectangular grooves (30), the four rectangular grooves (30) are respectively aligned with the four triangular blocks (17), a ratchet (18) is provided inside the rectangular groove (30), the triangular block (17) contacts the ratchet (18), and both side planes on the triangular block (17) face the position of the ring (7) of the bearing sleeve (2).

5. The universal joint transmission shaft assembly according to claim 4, characterized in that: A telescopic rod (19) is provided between the sliders (9), the telescopic rod (19) is fixedly connected to the cross shaft (1), the telescopic rod (19) is slidably connected to the telescopic rod (20), the telescopic rod (20) is elastically connected to the telescopic rod (19), and one end of the telescopic rod (20) is provided with a rounded corner.

6. The universal joint transmission shaft assembly according to claim 5, characterized in that: A circular ring (21) is fixedly mounted on one side of the oil seal (4), a claw (23) is fixedly connected to the circular ring (7), the claw (23) is connected to the circular ring (21), a pressing block (24) is hinged on the circular ring (21), a torsion spring is provided at the hinge between the pressing block (24) and the circular ring (21), a pressing groove (29) is provided on the oil seal (4), one end of the pressing block (24) contacts the circular ring (7), and the other end extends into the pressing groove (29) and contacts the inner wall of the pressing groove (29) away from the surface of the cross shaft (1).

7. The universal joint transmission shaft assembly according to claim 6, characterized in that: The second circular ring (7) is also fixedly connected to a support rod (25), and both sides of the support rod (25) are in contact with the surface of the cross shaft (1). An arc groove (26) is provided at one end of the support rod (25). A knob (27) is rotatably connected to the cross shaft (1), and four arc protrusions (28) are fixedly connected to the knob (27). The arc protrusions (28) are located inside the arc groove (26) and in contact with the inner wall of the arc groove (26).

8. The universal joint transmission shaft assembly according to claim 6, characterized in that: The circular ring (21) is fixedly connected with a connecting protrusion (31), the connecting protrusion (31) is provided with a groove (22), the clamping claw (23) contacts the inner wall of the groove (22), and the connection between the connecting protrusion (31) and the circular ring (21) is located in the middle of the circular ring (21).

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