Periodic self-adaptive lubricating structure and planetary gear set

Abstract

The invention discloses a periodic self-adaptive lubricating structure and a planetary gear set. The periodic self-adaptive lubricating structure comprises a sun gear, at least one planetary gear, an inner gear ring and a lubricating assembly, wherein the inner gear ring is meshed with the planetary gear and provided with an oil groove; the lubricating assembly comprises a sealing ring, a spring, a guide rod fixedly connected with the sealing ring, a rotating rod, a driving piece rotationally connected with the rotating rod, a ball head rod connected with the driving piece, and a through hole formed in the end, facing the sun gear, of the inner gear ring. The ball head rod is driven through rotation of the planetary gear, transmission is conducted through the connecting rod-rack-bevel gear set, the rotating rod rotates and drives the sealing ring to slide up and down, the through hole is periodically opened and closed, automatic and intermittent supply of lubricating oil is achieved, excessive lubrication is avoided, and it is ensured that key parts are continuously lubricated. And steel balls in the flow guide assembly roll to assist in uniform distribution of oil, non-contact oil level monitoring is achieved through an air bag and a magnetic attraction piece, the lubricating efficiency is improved through the overall structure, abrasion is reduced, and maintenance is convenient.

Description

Technical Field

[0001] This invention relates to the field of mechanical transmission technology, and in particular to a periodic adaptive lubrication structure and a planetary gear set. Background Technology

[0002] A planetary gear set is a special type of gear system in which the gears not only rotate around their own axes (called "rotation"), but also rotate around the axes of other gears (such as the sun gear) along with the planet carrier (called "revolution"). It is named for its motion, which resembles that of planets in the solar system. During operation, the planetary gears continuously mesh and transmit power between the sun gear and the ring gear, experiencing significant friction and loads, thus resulting in the most severe wear. To reduce wear and extend service life, regular lubrication of the planetary gears is essential.

[0003] However, most planetary gears are still lubricated manually by applying lubricant. Since planetary gears are typically installed inside the gearbox, each lubrication session requires disassembling the gearbox, a cumbersome, time-consuming, and labor-intensive process that greatly inconveniences daily maintenance. Therefore, there is an urgent need for a more efficient and convenient automatic lubrication system to simplify maintenance procedures and improve the reliability and lifespan of planetary gear sets. Summary of the Invention

[0005] This invention provides a periodic adaptive lubrication structure and a planetary gear set to solve the technical problems of planetary gears in the prior art, such as reliance on manual maintenance, inability to guarantee sufficient lubrication, and easy aggravation of wear due to insufficient lubrication.

[0006] In view of the above technical problems, embodiments of the present invention provide a periodic adaptive lubrication structure, including a sun gear, at least one planetary gear mounted on a planet carrier and meshing with the sun gear, an internal gear ring with an oil groove meshing with the planetary gear, and a lubrication assembly disposed in the oil groove;

[0007] The lubrication assembly includes a sealing ring slidably connected to the inner wall of the oil groove, a spring connected between the bottom end of the sealing ring and the bottom wall of the oil groove, a guide rod fixedly connected to the sealing ring, a rotating rod with a spiral groove, a drive component rotatably connected to the rotating rod, a ball joint rod connected to the drive component, and a plurality of through holes arranged in a circumferential array on the end of the internal gear ring facing the sun gear.

[0008] The guide rod is inserted into the spiral groove, one end of the rotating rod is rotatably connected to the inner bottom wall of the oil groove, and the other end of the rotating rod is connected to the drive member; the ball head rod includes a ball head guide member at its end; one end of the ball head rod is connected to the drive member, and the other end extends out of the guide groove opened in the internal gear ring to the ball head guide member connected to the end wall of the internal gear ring facing the sun gear.

[0009] Optionally, the driving component includes a rack slidably connected to the inner sidewall of the internal gear ring, a connecting rod hinged to both the ball joint and the rack, a boss fixedly installed on the inner wall of the oil groove, a rotating shaft passing through the boss and rotatably connected to the boss, a driving gear installed at the first end of the rotating shaft, a large bevel gear installed at the second end of the rotating shaft, and a small bevel gear meshing with the large bevel gear; the small bevel gear is sleeved with the other end of the rotating rod.

[0010] Optionally, the periodic adaptive lubrication structure further includes a plurality of flow guiding components evenly distributed along the circumferential direction. The flow guiding components include a connecting rod fixedly connected to the end face of the sealing ring away from the guide rod, a flow guiding frame fixedly connected to the connecting rod and slidably installed in the flow guiding groove, a collar fixedly connected between the inner walls of the flow guiding frame, steel balls rolled in the collar, and a plurality of flow guiding holes disposed on the end of the internal gear ring facing the sun gear and communicating with the flow guiding groove.

[0011] Optionally, the internal gear ring includes a plurality of strip teeth evenly distributed along the circumference, and a plurality of guide holes are formed on adjacent strip teeth spaced apart by a preset number of teeth, and the plurality of guide holes are evenly distributed on the corresponding strip teeth at a preset distance.

[0012] Optionally, the periodic adaptive lubrication structure further includes a vision monitoring component and a groove formed on the outer wall of the internal gear ring. The vision monitoring component includes an iron plate slidably mounted on the inner wall of the oil groove, an airbag connected to the end face of the iron plate facing the bottom wall of the oil groove, and a magnetic suction element slidably mounted on the groove and connected to the iron plate.

[0013] Optionally, it also includes an oil pipe fixedly installed on the non-load-bearing surface of the internal gear ring, and the oil inlet of the oil pipe is threadedly connected to a pipe cap.

[0014] The present invention also provides a planetary gear set including the above-described periodic adaptive lubrication structure.

[0015] In this invention, the planetary gear lubrication structure achieves periodic lubrication through a mechanical linkage driven by the rotation of the planetary gears: when the planetary gears rotate, they press against the ball joint, which, via a connecting rod-rack-bevel gear set, drives the rotating rod to rotate. The helical groove pushes the sealing ring to slide up and down along the oil groove. When the sealing ring moves downward, it opens the through hole, allowing lubricating oil to be evenly discharged through the through hole, guide groove, and guide hole, lubricating the contact surface between the planetary gear and the gear ring. When the ball joint disengages from the planetary gear, the spring resets and engages with the driving component, causing the sealing ring to move upward and close the through hole. Thus, by triggering the lubrication action through the rotation of the planetary gears, automatic and intermittent lubrication is achieved, avoiding over-lubrication and grease waste. Simultaneously, it ensures continuous lubrication of critical components such as the planetary gears and the sun gear, significantly reducing wear and extending service life.

[0016] In addition, the rolling steel balls in the flow guide assembly assist the flow of lubricating oil, ensuring full circumference coverage. Meanwhile, the airbag and magnetic components monitor the oil level, providing direct feedback on the oil level through the displacement of the metal plate, achieving contactless liquid level warning. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of a periodic adaptive lubrication structure in one embodiment of the present invention;

[0019] Figure 2 This is a side cross-sectional view of a periodic adaptive lubrication structure in one embodiment of the present invention;

[0020] Figure 3 This is a schematic diagram of the overall structure of the sealing ring of the periodic adaptive lubrication structure in one embodiment of the present invention;

[0021] Figure 4 This is an enlarged structural schematic diagram of point B of the periodic adaptive lubrication structure in one embodiment of the present invention;

[0022] Figure 5 This is an enlarged structural schematic diagram of point C of the periodic adaptive lubrication structure in one embodiment of the present invention;

[0023] Figure 6 This is an enlarged structural schematic diagram of point A of the periodic adaptive lubrication structure in one embodiment of the present invention;

[0024] Figure 7 This is an enlarged structural schematic diagram of point E of the periodic adaptive lubrication structure in one embodiment of the present invention;

[0025] Figure 8 This is an enlarged schematic diagram of point D of the periodic adaptive lubrication structure in one embodiment of the present invention.

[0026] The reference numerals in the accompanying drawings are as follows:

[0027] 1-Sun gear, 2-Planetary gear, 3-Internal gear ring, 31-Rack gear, 4-Planetary carrier, 5-Oil groove, 6-Lubrication assembly, 61-Sealing ring, 62-Spring, 63-Guide rod, 64-Rotor, 641-Helical groove, 65-Drive component, 651-Rack, 652-Connecting rod, 653-Boss, 654-Rotating shaft, 655-Drive gear, 656-Large bevel gear, 657-Small bevel gear, 66-Ball head rod, 661-Ball head guide, 67-Through hole, 7-Guide groove, 8-Guide assembly, 81-Connecting rod, 82-Guide frame, 83-Collar, 84-Steel ball, 9-Guide hole, 10-Slide groove, 11-Vision monitoring assembly, 111-Iron plate, 112-Airbag, 113-Magnetic suction component, 12-Oil pipe, 121-Pipe cap. Detailed Implementation

[0028] To make the technical problems solved, the technical solutions, and the beneficial effects of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0029] In the description of this invention, it should be understood that the terms "longitudinal," "radial," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0030] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0031] like Figures 1 to 8As shown, an embodiment of the present invention provides a periodic adaptive lubrication structure, including a sun gear 1, at least one planetary gear 2 mounted on a planet carrier 4 and meshing with the sun gear 1, an internal gear ring 3 with an oil groove 5 meshing with the planetary gear 2, and a lubrication assembly 6 disposed within the oil groove 5. The lubrication assembly 6 includes a sealing ring 61 slidably connected to the inner wall of the oil groove 5, a spring 62 connected between the bottom end of the sealing ring 61 and the inner bottom wall of the oil groove 5, a guide rod 63 fixedly connected to the sealing ring 61, a rotating rod 64 with a helical groove 641, a drive member 65 rotatably connected to the rotating rod 64, a ball joint 66 linked to the drive member 65, and a plurality of through holes 67 arranged in a circumferential array on the end of the internal gear ring 3 facing the sun gear 1. The guide rod 63 is inserted into the spiral groove 641. One end of the rotating rod 64 is rotatably connected to the inner bottom wall of the oil groove 5, and the other end of the rotating rod 64 is connected to the drive member 65. The ball joint rod 66 includes a ball joint guide 661 at its end. One end of the ball joint rod 66 is connected to the drive member 65, and the other end extends out of the guide groove 7 opened in the internal gear ring 3 to the ball joint guide 661 and connects to the end wall of the internal gear ring 3 facing the sun gear 1. The rotation of the sun gear 1 drives multiple planetary gears 2 connected to the planet carrier 4 to rotate synchronously. The internal gear ring 3 meshes with the planetary gears 2 and rotates synchronously with them. The internal gear ring 3 is provided with an oil groove 5 for holding lubricating oil, and a lubrication assembly 6 is provided in the oil groove 5. The other end of the ball joint 66 extends out of the guide groove 7 and extends to the ball joint guide 661, which fits against the end wall of the internal gear ring 3 facing the sun gear 1. The ball joint guide 661 can extend and retract without moving at the radial position of the guide groove 7 perpendicular to the internal gear ring 3. The end of the ball joint 66 connected to the drive member 65 can slide obliquely around the drive member 65 and the end face of the guide groove 7 facing the drive member 65.

[0032] Understandably, when the planetary gear 2 rotates inside the internal gear ring 3, when the planetary gear 2 contacts the ball-end guide 661 of the ball-end rod 66 at the end of the internal gear ring 3, it will push the ball-end guide 661 to press radially inward into the guide groove 7 of the internal gear ring 3. Since the ball-end rod 66 is hinged to the drive member 65, this pressing force will drive the ball-end rod 66 to slide along the inner wall of the oil groove 5, thereby driving the drive member 65 connected to it to move synchronously. The action of the drive member 65 is transmitted to the rotating rod 64 connected to it, causing the rotating rod 64 to rotate around its own axis; when the rotating rod 64 rotates, the spiral groove 641 opened on the rotating rod 64 rotates accordingly. Through the insertion and cooperation of the spiral groove 641 and the guide rod 63, the rotation of the spiral groove 641 will generate a downward (along the direction from the top to the bottom of the oil groove 5) pressing force on the guide rod 63.

[0033] When the guide rod 63 is compressed, it drives the sealing ring 61, which is fixedly connected to it, to slide downward on the inner wall of the oil groove 5. The compression spring 62 can store elastic potential energy. As the sealing ring 61 slides down, the obstruction of the through hole 67 on the side wall of the oil groove 5 by the sealing ring 61 is gradually released, allowing the lubricating oil in the oil groove 5 to flow out through the through hole 67 to the outside of the internal gear ring 3. The flowing lubricating oil can directly cover the outer wall of the internal gear ring 3, which can reduce the friction and wear between the planetary gear 2 and the internal gear ring 3 when the planetary gear 2 rotates. At the same time, during the continuous rotation of the planetary gear 2, the outer wall of the planetary gear 2 will gradually be covered with the lubricating oil on the outside of the internal gear ring 3, thereby synchronously lubricating the meshing area between the planetary gear 2 and the sun gear 1.

[0034] In this invention, the rotation of planetary gear 2 triggers mechanical linkage, enabling the periodic automatic supply of lubricating oil. Lubrication of the planetary gears and internal gear ring can be completed without disassembling the gearbox, significantly improving maintenance convenience and effectively reducing component wear caused by insufficient lubrication, thereby extending the service life of the planetary gear set.

[0035] In one embodiment, such as Figures 1 to 2 , Figure 4 , Figure 6 As shown, the driving component 65 includes a rack 651 slidably connected to the inner sidewall of the internal gear ring 3, a connecting rod 652 hinged to both the ball head rod 66 and the rack 651, a boss 653 fixedly installed on the inner wall of the oil groove 5, a rotating shaft 654 passing through the boss 653 and rotatably connected to the boss 653, a driving gear 655 installed at the first end of the rotating shaft 654, a large bevel gear 656 installed at the second end of the rotating shaft 654, and a small bevel gear 657 meshing with the large bevel gear 656; the small bevel gear 657 is sleeved with the other end of the rotating rod 64.

[0036] Understandably, when the drive ball joint 66 is pressed and slides along the inner wall of the oil groove 5, the drive ball joint 66 presses against the connecting rod 652, thereby causing the connecting rod 652 to press against the rack 651, causing the rack 651 to slide downwards along the inner wall of the oil groove 5. The linear motion of the rack 651 is converted into the rotational motion of the rotating shaft 654 through the drive gear 655 meshing with it. The two ends of the rotating shaft 654 are respectively equipped with the drive gear 655 and the large bevel gear 656. The large bevel gear 656 meshes with the small bevel gear 657 at the end of the rotating rod 64, forming a bevel gear pair. The rotation of the small bevel gear 657 drives the rotating rod 64 to rotate around its axis. The helical groove 641 on the rotating rod 64 rotates synchronously with the rotating rod. Through the cooperation of the helical groove and the guide rod 63, the rotational motion is converted into the axial displacement of the guide rod 63. The guide rod 63 pushes the sealing ring 61 to slide downward along the inner wall of the oil groove 5, compressing the spring 62 and gradually disengaging from the through hole 67, so that the lubricating oil in the oil groove 5 is periodically discharged to the outside of the internal gear ring 3 through the through hole 67.

[0037] In one embodiment, such as Figures 1 to 2 , Figures 4 to 5 , Figure 7 As shown, the periodic adaptive lubrication structure further includes a plurality of flow guiding components 8 evenly distributed along the circumferential direction. The flow guiding components 8 include a connecting rod 81 fixedly connected to the end face of the sealing ring 61 away from the guide rod 63, a flow guiding frame 82 fixedly connected to the connecting rod 81 and slidably installed in the flow guiding groove 7, a collar 83 fixedly connected between the inner walls of the flow guiding frame 82, a steel ball 84 rollingly installed in the collar 83, and a plurality of flow guiding holes 9 provided on the end of the internal gear ring 3 facing the sun gear 1 and communicating with the flow guiding groove 7.

[0038] Understandably, as the sealing ring 61 slides up and down along the inner wall of the oil groove 5, the connecting rod 81, which is fixed to the sealing ring 61, synchronously drives the guide frame 82 to move back and forth along the inner wall of the guide groove 7. The collar 83 embedded in the guide frame 82 contains steel balls 84, the outer wall of which is in close contact with the inner wall of the guide groove 7, creating rolling friction. When the guide frame 82 slides up and down, the balls 84 roll within the guide groove 7, efficiently carrying the lubricating oil discharged from the through hole 67 into the guide groove 7 and pushing the lubricating oil along the guide groove 7. Subsequently, the lubricating oil is evenly discharged outward through multiple guide holes 9 distributed at the end of the internal gear ring 3 until it covers the outer wall of the internal gear ring 3 and the meshing area of ​​the planetary gear 2. Furthermore, the rolling friction of the steel balls 84 reduces energy consumption and ensures stable flow of lubricating oil within the guide groove 7. Multiple guide holes 9 distribute the lubricating oil to the entire circumference of the outer wall of the internal gear ring 3, ensuring that the meshing surfaces of the planetary gear 2, internal gear ring 3, and sun gear 1 are evenly lubricated, reducing localized wear. The up-and-down movement of the sealing ring 61 is converted into directional delivery of lubricating oil through the guide assembly 8, achieving synchronization between lubrication and sealing control, and preventing lubricating oil leakage or uneven distribution. The lubricating oil flow rate can be dynamically adjusted with the displacement of the sealing ring 61 to adapt to the lubrication needs of the planetary gear under different operating conditions, balancing high efficiency and economy.

[0039] In one embodiment, such as Figure 1 , Figure 6As shown, the internal gear ring 3 includes a plurality of strip teeth 31 evenly distributed along the circumference. Multiple guide holes 9 are formed on adjacent strip teeth 31 spaced apart by a preset number of teeth. These guide holes 9 are evenly distributed at a preset distance on the corresponding strip teeth 31. Understandably, the spaced distribution of the guide holes 9 avoids excessive concentration of lubricating oil at a single tooth position. Combined with the axial extension characteristics of the internal gear ring 3, the lubricating oil is distributed periodically and segmentally along the outer wall of the internal gear ring 3, covering the entire circumference of the meshing area between the planetary gear 2 and the internal gear ring 3. This reduces the risk of localized dry friction, avoids oil concentration caused by excessively dense guide holes 9, and also prevents lubrication blind spots caused by too few holes. By skipping teeth to form guide holes 9 (e.g., setting a set every 2-3 teeth), the efficiency of lubricating oil flow is ensured while maintaining the rigidity of the tooth structure of the internal gear ring 3. This prevents stress concentration or a decrease in meshing stiffness due to excessive holes, ensuring the dynamic stability of the planetary gear set 2 under high-speed operation.

[0040] In one embodiment, such as Figures 1 to 2 As shown, the periodic adaptive lubrication structure also includes a visual monitoring component 11 and a groove 10 formed on the outer wall of the internal gear ring 3. The visual monitoring component 11 includes an iron plate 111 slidably mounted on the inner wall of the oil tank 5, an airbag 112 connected to the end face of the iron plate 111 facing the bottom wall of the oil tank 5, and a magnetic suction component 113 slidably mounted on the groove 10 and connected to the iron plate 111. Understandably, the visual monitoring component 11 provides real-time feedback on the remaining lubricating oil in the oil tank 5 through a buoyancy-magnetic linkage mechanism: the airbag 112 is set in the oil tank 5 in combination with the iron plate 111. The airbag 112 is passively compressed or expanded as the lubricating oil level rises and falls, driving the iron plate 111 to slide vertically along the inner wall of the oil tank 5; the iron plate 111 forms a non-contact adsorption with the groove 10 through the magnetic suction component 113 (such as a permanent magnet), and the displacement of the magnetic suction component 113 in the groove 10 is synchronized with the height of the iron plate 111. When the lubricating oil level drops, the airbag 112 contracts, causing the iron plate 111 and the magnetic suction component 113 to slide downwards along the slide groove 10. Maintenance personnel can quickly determine the amount of lubricating oil in the oil tank 5 by observing the scale marks or position signals (such as magnetic sensor feedback) of the magnetic suction component 113, thus achieving non-contact liquid level monitoring.

[0041] In one embodiment, such as Figures 1 to 2 , Figure 8 As shown, the periodic adaptive lubrication structure also includes an oil pipe 12 fixedly installed on the non-load-bearing surface of the internal gear ring 3. The oil inlet (not shown) of the oil pipe 12 is threadedly connected to a pipe cap 121. Understandably, without disassembling the gearbox, maintenance personnel can directly unscrew the pipe cap 121 and add lubricating oil to the oil sump 5 through the oil pipe 12. The threaded connection design enhances the sealing of the oil inlet, preventing lubricating oil leakage or external contaminants from entering the oil sump 5, thus ensuring the cleanliness of the lubrication system.

[0042] The present invention also provides a planetary gear set including the above-described periodic adaptive lubrication structure.

[0043] The present invention also provides a planetary gear set including the above-described periodic adaptive lubrication structure. In the planetary gear set of the above embodiments of the present invention, the periodic adaptive lubrication structure includes a sun gear 1, at least one planetary gear 2 mounted on a planet carrier 4 and meshing with the sun gear 1, an internal gear ring 3 having an oil groove 5 meshing with the planetary gear 2, and a lubrication assembly 6 disposed within the oil groove 5. The lubrication assembly 6 includes a sealing ring 61 slidably connected to the inner wall of the oil groove 5, a spring 62 connecting the bottom end of the sealing ring 61 to the inner bottom wall of the oil groove 5, a guide rod 63 fixedly connected to the sealing ring 61, a rotating rod 64 having a helical groove 641, a drive member 65 rotatably connected to the rotating rod 64, a ball joint 66 linked to the drive member 65, and a plurality of through holes 67 arranged in a circumferential array on the end of the internal gear ring 3 facing the sun gear 1. The guide rod 63 is inserted into the spiral groove 641. One end of the rotating rod 64 is rotatably connected to the inner bottom wall of the oil groove 5, and the other end of the rotating rod 64 is connected to the drive member 65. The ball head rod 66 includes a ball head guide member 661 at its end. One end of the ball head rod 66 is connected to the drive member 65, and the other end extends out of the guide groove 7 opened in the internal gear ring 3 to the ball head guide member 661 and is connected to the end wall of the internal gear ring 3 facing the sun gear 1.

[0044] In this invention, when the planetary gear 2 rotates inside the internal gear ring 3, when the planetary gear 2 contacts the ball-end guide 661 of the ball-end rod 66 at the end of the internal gear ring 3, it pushes the ball-end guide 661 to press radially inward toward the guide groove 7 of the internal gear ring 3. Since the ball-end rod 66 is hinged to the drive member 65, this pressing force drives the ball-end rod 66 to slide along the inner wall of the oil groove 5, thereby driving the drive member 65 connected to it to move synchronously. The movement of the drive member 65 is transmitted to the rotating rod 64 rotatably connected to it, causing the rotating rod 64 to rotate around its own axis; when the rotating rod 64 rotates, the spiral groove 641 opened on the rotating rod 64 rotates accordingly. Through the insertion and cooperation of the spiral groove 641 and the guide rod 63, the rotation of the spiral groove 641 will generate a downward (along the direction from the top to the bottom of the oil groove 5) pressing force on the guide rod 63.

[0045] When the guide rod 63 is compressed, it drives the sealing ring 61, which is fixedly connected to it, to slide downward on the inner wall of the oil groove 5. The compression spring 62 can store elastic potential energy. As the sealing ring 61 slides down, the obstruction of the through hole 67 on the side wall of the oil groove 5 by the sealing ring 61 is gradually released, allowing the lubricating oil in the oil groove 5 to flow out through the through hole 67 to the outside of the internal gear ring 3. The flowing lubricating oil can directly cover the outer wall of the internal gear ring 3, which can reduce the friction and wear between the planetary gear 2 and the internal gear ring 3 when the planetary gear 2 rotates. At the same time, during the continuous rotation of the planetary gear 2, the outer wall of the planetary gear 2 will gradually be covered with the lubricating oil on the outside of the internal gear ring 3, thereby synchronously lubricating the meshing area between the planetary gear 2 and the sun gear 1.

[0046] When planetary gear 2 disengages from the ball head guide 661 of ball head rod 66, spring 62 releases its compressive potential energy, pushing sealing ring 61 upward along the inner wall of oil groove 5 to re-close through hole 67 and terminate lubricating oil discharge. During the upward movement of sealing ring 61, its fixedly connected guide rod 63 slides upward along the spiral groove 641 of rotating rod 64, converting vertical motion into rotational power of rotating rod 64 through the spiral pair, driving rotating rod 64 to rotate around its axis. Small bevel gear 657 at the end of rotating rod 64 meshes with large bevel gear 656, driving rotating shaft 654 and drive gear 655 to rotate synchronously. Drive gear 655 pushes connecting rod 652 through rack 651, causing ball head rod 66 to move radially outward along guide groove 7, and ball head guide 661 protrudes again from the outer wall of inner gear ring 3. When planetary gear 2 rotates again to contact ball head guide 661, the squeezing action is repeated, forming a periodic cycle.

[0047] Thus, the sealing ring 61 slides back and forth along the inner wall of the oil groove 5 under the action of the spiral groove 641 and the guide rod 63, periodically opening and closing the through hole 67. When the sealing ring 61 moves down, the through hole 67 opens, and the lubricating oil in the oil groove 5 is evenly discharged through the through hole 67; when the sealing ring 61 moves up, the through hole 67 closes, and the spring 62 returns to its original position. Through the continuous rotation of the planetary gear 2, the lubrication assembly achieves intermittent and quantitative supply of lubricating oil, which avoids over-lubrication and ensures continuous lubrication of the gear meshing parts, significantly improving lubrication efficiency and reducing resource waste.

[0048] Furthermore, as the sealing ring 61 slides up and down along the inner wall of the oil groove 5, the connecting rod 81, which is fixed to the sealing ring 61, synchronously drives the guide frame 82 to move back and forth along the inner wall of the guide groove 7. The collar 83 embedded in the guide frame 82 contains steel balls 84, the outer wall of which is in close contact with the inner wall of the guide groove 7, forming rolling friction. When the guide frame 82 slides up and down, the balls 84 roll within the guide groove 7, efficiently carrying the lubricating oil discharged from the through hole 67 into the guide groove 7 and pushing the lubricating oil along the guide groove 7. Subsequently, the lubricating oil is evenly discharged outward through multiple guide holes 9 distributed at the end of the internal gear ring 3 until it covers the outer wall of the internal gear ring 3 and the meshing area of ​​the planetary gear 2. In addition, the rolling friction of the steel balls 84 reduces energy consumption and ensures that the lubricating oil flows stably in the guide groove 7; multiple guide holes 9 disperse the lubricating oil to the entire circumference of the outer wall of the internal gear ring 3, so that the meshing surfaces of the planetary gear 2, the internal gear ring 3, and the sun gear 1 can be evenly lubricated, reducing local wear.

[0049] During the operation of the lubrication assembly 6, the amount of lubricating oil in the oil tank 5 can be quickly determined by observing the scale marks or position signals (such as magnetic sensor feedback) of the magnetic suction component 113, achieving non-contact liquid level monitoring. Because the oil tank 5 is equipped with an airbag 112 and an iron plate 111, the airbag 112 passively compresses or expands with the rise and fall of the lubricating oil level, driving the iron plate 111 to slide vertically along the inner wall of the oil tank 5. The iron plate 111 forms a non-contact adsorption with the slide groove 10 through the magnetic suction component 113 (such as a permanent magnet), and the displacement of the magnetic suction component 113 within the slide groove 10 is synchronized with the height of the iron plate 111. When the lubricating oil level drops, the airbag 112 contracts, losing its supporting force on the iron plate 111. Under the action of gravity, the iron plate 111 slides downwards along the inner wall of the oil tank 5, and the iron plate 111 drives the magnetic suction component 113 to slide downwards along the slide groove 10. In this way, maintenance personnel can observe the position of the magnetic suction component 113 on the slide groove 10 to determine the remaining amount of lubricating oil in the oil groove 5 in real time.

[0050] The above-described embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be included within the protection scope of the present invention.

Claims

1. A periodic adaptive lubrication structure, characterized in that, It includes a sun gear (1), at least one planetary gear (2) mounted on a planet carrier (4) and meshing with the sun gear (1), an internal gear ring (3) having an oil groove (5) meshing with the planetary gear (2), and a lubrication assembly (6) disposed in the oil groove (5); The lubrication assembly (6) includes a sealing ring (61) slidably connected to the inner wall of the oil groove (5), a spring (62) connected between the bottom end of the sealing ring (61) and the inner bottom wall of the oil groove (5), a guide rod (63) fixedly connected to the sealing ring (61), a rotating rod (64) with a spiral groove (641), a drive member (65) rotatably connected to the rotating rod (64), a ball head rod (66) connected to the drive member (65), and a plurality of through holes (67) arranged in a circumferential array on the end of the internal gear ring (3) facing the sun gear (1); The guide rod (63) is inserted into the spiral groove (641), one end of the rotating rod (64) is rotatably connected to the inner bottom wall of the oil groove (5), and the other end of the rotating rod (64) is connected to the drive member (65); the ball head rod (66) includes a ball head guide member (661) provided at its end; one end of the ball head rod (66) is connected to the drive member (65), and the other end extends out of the guide groove (7) opened in the internal gear ring (3) to the ball head guide member (661) connected to the end wall of the internal gear ring (3) facing the sun gear (1).

2. The periodic adaptive lubrication structure according to claim 1, characterized in that, The drive component (65) includes a rack (651) slidably connected to the inner sidewall of the internal gear ring (3), a connecting rod (652) hinged to the ball head rod (66) and the rack (651), a boss (653) fixedly installed on the inner wall of the oil groove (5), a rotating shaft (654) passing through the boss (653) and rotatably connected to the boss (653), a drive gear (655) installed at the first end of the rotating shaft (654), a large bevel gear (656) installed at the second end of the rotating shaft (654), and a small bevel gear (657) meshing with the large bevel gear (656); the small bevel gear (657) is sleeved with the other end of the rotating rod (64).

3. The periodic adaptive lubrication structure according to claim 2, characterized in that, It also includes a plurality of flow guiding components (8) evenly distributed along the circumference. The flow guiding components (8) include a connecting rod (81) fixedly connected to the end face of the sealing ring (61) away from the guide rod (63), a flow guiding frame (82) fixedly connected to the connecting rod (81) and slidably installed in the flow guiding groove (7), a collar (83) fixedly connected between the inner walls of the flow guiding frame (82), a steel ball (84) rollingly installed in the collar (83), and a plurality of flow guiding holes (9) provided on the end of the internal gear ring (3) facing the sun gear (1) and communicating with the flow guiding groove (7).

4. The periodic adaptive lubrication structure according to claim 3, characterized in that, The internal gear ring (3) includes a plurality of strip teeth (31) evenly distributed along the circumference. A plurality of guide holes (9) are opened on adjacent strip teeth (31) spaced apart by a preset number of teeth. The plurality of guide holes (9) are evenly distributed on the corresponding strip teeth (31) at a preset distance.

5. The periodic adaptive lubrication structure according to claim 4, characterized in that, It also includes a visual monitoring component (11) and a groove (10) formed on the outer wall of the inner gear ring (3). The visual monitoring component (11) includes an iron plate (111) slidably mounted on the inner wall of the oil tank (5), an airbag (112) connected to the end face of the iron plate (111) facing the bottom wall of the oil tank (5), and a magnetic suction element (113) slidably mounted on the groove (10) and connected to the iron plate (111).

6. The periodic adaptive lubrication structure according to claim 5, characterized in that, It also includes an oil pipe (12) fixedly installed on the non-bearing surface of the internal gear ring (3), and the oil inlet of the oil pipe (12) is threadedly connected to a pipe cap (121).

7. A planetary gear set, characterized in that, Includes the periodic adaptive lubrication structure as described in any one of claims 1-7.

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