Self-lubricating combined type planetary gear transmission mechanism and filter

Abstract

The invention discloses a self-lubricating combined type planetary gear transmission mechanism. The self-lubricating combined type planetary gear transmission mechanism comprises a planet carrier, an eccentric sun gear, a rotating shaft, a planetary gear and a self-lubricating assembly, and the self-lubricating assembly comprises a lubricating part and a control part connected with the rotating shaft; the lubricating part comprises an annular fixing plate, an annular extrusion air bag connected with the inner surface of the annular fixing plate, an annular expansion air bag connected with the outer surface of the annular fixing plate and a lubricating column penetrating through the planet carrier. When the rotating shaft drives the planetary gear to start to work, the control part drives the push plate to move to extrude the annular extrusion air bag, so that air is pressed into the annular expansion air bag and expands, lubricating oil flows out of the oil discharge hole to the meshing part of the planetary gear and the eccentric sun gear, and comprehensive lubrication is achieved. The whole lubricating process is automatically started along with rotation of the rotating shaft, manual inspection or manual lubrication is not needed, it is guaranteed that all parts are fully lubricated, and use is extremely convenient.

Description

Technical Field

[0001] This invention relates to the field of mechanical transmission technology, and in particular to a self-lubricating composite planetary gear transmission mechanism and filter. Background Technology

[0002] Planetary gears are a special type of gear system characterized by their ability to rotate not only around their own axis like fixed-axis gears, but also around the axes of other gears along with the planet carrier. Planetary gear drives, as an important mechanical transmission method, are widely used in reducers, speed increasers, and speed changers in various mechanical transmission systems. However, existing planetary gears suffer from two main problems in practical operation: firstly, they require regular maintenance to ensure adequate lubrication between components and prevent severe wear, but manual lubrication is difficult to guarantee sufficient lubrication for all parts, resulting in insufficient maintenance; secondly, planetary gears generate noise and vibration during operation, which may affect their overall service life. To address these issues, a composite adaptive planetary gear system is proposed to optimize performance. Summary of the Invention

[0003] This invention provides a self-lubricating composite planetary gear transmission mechanism and filter to solve the technical problem in the prior art that planetary gears require manual addition of lubricating oil, making it difficult to ensure that all parts of the planetary gear set are adequately lubricated.

[0004] In view of the above technical problems, the present invention provides a self-lubricating composite planetary gear transmission mechanism, including a planet carrier, a rotating shaft passing through the planet carrier and sleeved with an eccentric sun gear, a planetary gear meshing with the eccentric sun gear and rotatably mounted on the planet carrier, and a self-lubricating component, the self-lubricating component including a lubrication part and a control part connected to the rotating shaft;

[0005] The lubrication unit includes an annular fixing plate fixedly connected to the inner wall of the planetary carrier, an annular compression airbag connected to the inner surface of the annular fixing plate, an annular expansion airbag connected to the outer surface of the annular fixing plate, an air supply pipe connecting the annular compression airbag and the annular expansion airbag, and a lubrication column penetrating the planetary carrier.

[0006] The control unit is used to generate mechanical action when the shaft rotates to squeeze the annular compression airbag and force the gas in the annular compression airbag into the annular expansion airbag, so that the annular expansion airbag expands and applies pressure to the lubricating oil in the planet carrier. After being pressed, the lubricating oil is discharged to the planetary gear through the lubrication column to achieve automatic lubrication between the eccentric sun gear and the planetary gear.

[0007] Optionally, the lubrication section further includes an oil filling cap disposed on the end face of the planetary carrier away from the lubrication post; and a plurality of evenly distributed oil drain holes are disposed on the side of the lubrication post near the planetary gear.

[0008] Optionally, the control unit includes a transmission unit linked to the surface of the rotating shaft, a rotating ring rotatably connected to the inner wall of the planetary carrier, a fixing ring disposed around the rotating ring and fixedly connected to the inner wall of the planetary carrier, a disc fixedly connected to the end face of the rotating ring opposite to the lubrication column, and a plurality of push plates disposed on the end face of the fixing ring opposite to the lubrication column; the push plate includes a connecting rod slidably mounted in a transverse groove on the planetary carrier, an extrusion plate connecting the connecting rod, and a sliding rod vertically connected to the end of the connecting rod away from the extrusion plate;

[0009] The disk has multiple arc-shaped grooves, and the sliding rod is inserted into the arc-shaped grooves.

[0010] Optionally, the transmission unit includes a drive plate hinged to the surface of the rotating shaft, a rubber rope fixedly connected between the drive plate and the rotating shaft, a driven plate hinged to the inner wall of the rotating ring, and an abutment groove formed on the side of the driven plate near the rotating ring.

[0011] Optionally, the transmission unit further includes a movable groove formed on the outer wall of the rotating ring and communicating with the abutment groove, an abutment rod slidably installed in the movable groove, a connecting spring abutting between the abutment rod and the inner wall of the movable groove, and a first torsion spring installed between the rotating ring and the driven plate.

[0012] Optionally, a connecting groove is provided on the inner wall of the fixed ring, and a spiral sliding groove is provided on the outer wall of the rotating ring; the self-lubricating composite planetary gear transmission mechanism further includes a limiting component disposed inside the planetary carrier, the limiting component including a push rod with a through hole, a moving block slidably mounted on the inner wall of the planetary carrier, an L-shaped rod connecting the moving block, a locking block hinged to the L-shaped rod, and a return spring;

[0013] One end of the push rod is slidably connected to the connecting groove, and the other end of the push rod is slidably connected to the spiral groove; the return spring abuts against the inner wall of the L-shaped rod and the connecting groove.

[0014] Optionally, the limiting assembly further includes a fixing block fixedly connected to the end side wall of the L-shaped rod and abutting against the locking block, and a second torsion spring hinged to the end face of the locking block away from the fixing block; it also includes a tension spring, one end of which is fixedly connected to the inner wall of the connecting groove, and the other end of which is connected to the side wall of the push rod.

[0015] Optionally, it may also include an outer ring, an inner ring, a bearing connected between the outer ring and the inner ring, a flexible internal gear ring meshing with the planetary gear, and an elastic connector connected between the inner ring and the flexible internal gear ring.

[0016] The present invention also provides a filter comprising the above-described self-lubricating compound planetary gear transmission mechanism.

[0017] In this invention, a meticulously designed lubrication assembly achieves maintenance-free automatic lubrication of the planetary gear transmission mechanism. When the rotating shaft drives the planetary gears to start working, the pressing plate of the push plate in the lubrication section moves precisely to a set position under the centrifugal force generated by the rotation of the shaft, applying uniform pressure to the annular pressing air bladder. This action causes the annular expanding air bladder to expand, thereby applying stable pressure to the lubricating oil in the planetary carrier, allowing the lubricating oil to flow precisely out through the oil drain hole on the lubrication column, providing comprehensive lubrication to the planetary gears, flexible internal gear ring, and eccentric sun gear. The entire lubrication process requires no manual intervention, not only avoiding equipment wear caused by insufficient lubrication but also eliminating the phenomenon of excessive lubricating oil waste, significantly reducing equipment maintenance costs and manual labor intensity, and improving equipment operating efficiency and reliability.

[0018] In this invention, the cleverly designed elastic connector between the inner ring and the flexible internal gear ring, combined with the harmonic transmission characteristics of planetary gears driven by an eccentric sun gear, endows the gear ring assembly with significant buffering and filtering functions. The annular gap formed by the elastic connector and the deformation of the flexible gear effectively buffer external nonlinear impacts, filter internal radial impacts, and eliminate instantaneous radial impacts and real-time vibrations, achieving pure circumferential rotational output. This design significantly reduces operating noise and vibration during planetary gear transmission, improves the overall stability and service life of the equipment, and provides strong support for high-precision and high-reliability applications. Attached Figure Description

[0019] 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.

[0020] Figure 1 This is a side view of a self-lubricating composite planetary gear transmission mechanism according to an embodiment of the present invention.

[0021] Figure 2 This is a front view of a self-lubricating composite planetary gear transmission mechanism according to an embodiment of the present invention;

[0022] Figure 3This is a schematic diagram of the connection structure of the planet carrier, rotating shaft and lubrication column of a self-lubricating composite planetary gear transmission mechanism in one embodiment of the present invention.

[0023] Figure 4 This is a schematic diagram of the transverse groove structure on the inner wall of the planetary carrier of a self-lubricating composite planetary gear transmission mechanism in one embodiment of the present invention.

[0024] Figure 5 This is a schematic cross-sectional view of the planet carrier structure of a self-lubricating composite planetary gear transmission mechanism in one embodiment of the present invention.

[0025] Figure 6 This is a schematic diagram of the control unit structure of a self-lubricating composite planetary gear transmission mechanism in one embodiment of the present invention;

[0026] Figure 7 This is a schematic diagram of the lubrication section of a self-lubricating composite planetary gear transmission mechanism according to an embodiment of the present invention.

[0027] Figure 8 This is a schematic diagram of the lubrication section of a self-lubricating composite planetary gear transmission mechanism according to another embodiment of the present invention.

[0028] Figure 9 This is a schematic diagram of the connection structure between the rotating shaft and the limit control component of a self-lubricating composite planetary gear transmission mechanism in one embodiment of the present invention.

[0029] Figure 10 This is a schematic diagram of the installation structure of the transmission part of a self-lubricating composite planetary gear transmission mechanism in one embodiment of the present invention.

[0030] Figure 11 This is a schematic diagram of the connection structure of the moving groove, the contact rod, and the connecting spring of a self-lubricating composite planetary gear transmission mechanism in one embodiment of the present invention.

[0031] Figure 12 This is a schematic diagram of the structure of the fixing ring of a self-lubricating composite planetary gear transmission mechanism in one embodiment of the present invention;

[0032] Figure 13 This is a schematic diagram of the limiting component of a self-lubricating composite planetary gear transmission mechanism in one embodiment of the present invention.

[0033] The reference numerals in the accompanying drawings are as follows:

[0034] 1-Planet carrier, 2-Eccentric sun gear, 3-Shaft, 4-Planetary gear, 5-Control unit, 51-Fixed ring, 511-Connecting groove, 52-Transmission unit, 521-Driving plate, 522-Rubber rope, 523-Driven plate, 524-Abutting groove, 525-Moving groove, 526-Abutting rod, 527-Connecting spring, 528-First torsion spring, 53-Rotating ring, 531-Helical groove, 54-Disc, 55-Arc groove, 56-Transverse groove, 57-Push plate, 571-Connecting rod, 572-Extrusion plate 573-Sliding rod, 6-Lubrication part, 61-Annular fixing plate, 62-Annular compression air bladder, 63-Annular expansion air bladder, 64-Air supply pipe, 65-Lubrication column, 651-Oil drain hole, 66-Oil filler cap, 7-Limiting component, 73-Push rod, 74-Through hole, 75-Moving block, 76-L-shaped rod, 77-Reset spring, 78-Catching block, 79-Fixing block, 710-Second torsion spring, 711-Tension spring, 8-Outer ring, 9-Inner ring, 10-Bearing, 11-Flexible internal gear ring, 12-Elastic connector. Detailed Implementation

[0035] 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.

[0036] 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.

[0037] 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.

[0038] like Figures 1 to 13As shown, an embodiment of the present invention provides a self-lubricating composite planetary gear transmission mechanism, including a planet carrier 1, a rotating shaft 3 passing through the planet carrier 1 and sleeved with an eccentric sun gear 2, a planetary gear 4 meshing with the eccentric sun gear 2 and rotatably mounted on the planet carrier 1, and a self-lubricating assembly. The self-lubricating assembly includes a lubrication part 6 and a control part 5 connected to the rotating shaft 3. The lubrication part 6 includes an annular fixing plate 61 fixedly connected to the inner wall of the planet carrier 1, an annular compression air bladder 62 connected to the inner surface of the annular fixing plate 61, and an annular expansion air bladder connected to the outer surface of the annular fixing plate 61. The system includes a bladder 63, an air supply pipe 64 connecting the annular compression bladder 62 and the annular expansion bladder 63, and a lubrication column 65 penetrating the planetary carrier 1. The control unit 5 generates a mechanical action when the rotating shaft 33 rotates to compress the annular compression bladder 62 and force the gas inside the annular compression bladder 62 into the annular expansion bladder 63, causing the annular expansion bladder 63 to expand and apply pressure to the lubricating oil in the planetary carrier 1. The lubricating oil, after being pressurized, is discharged to the planetary gear 4 through the lubrication column 65, thereby achieving automatic lubrication between the eccentric sun gear 2 and the planetary gear 4. The rotating shaft 3 passes through the planetary carrier 1 and is sleeved with the eccentric sun gear 2. The eccentric sun gear 2 meshes with multiple planetary gears 4 on the planetary carrier 1. A motor is connected to the outside of the rotating shaft 3. When the rotating shaft 21 is driven by the motor to rotate, it can drive the eccentric sun gear 2 and the planetary gears 4 to rotate synchronously and in the same direction. One end of the lubrication column 65 is inserted through the planet carrier 1, and the other end is left outside the planetary gear 4. The inner cavity of the planet carrier 1 is filled with lubricating oil.

[0039] In this invention, adaptive lubrication of the planetary gear 4 transmission is achieved through the synergistic action of the control unit 5 and the lubrication unit 6: when the shaft 3 rotates, the centrifugal force it generates drives the control unit 5 to produce mechanical actions (such as the swing of the active plate 521 or the rotation of the ring 53), thereby squeezing the annular compression airbag 62; after the gas in the annular compression airbag 62 is forced into the annular expansion airbag 63, the expansion airbag expands radially and applies uniform and continuous pressure to the lubricating oil in the inner cavity of the planet carrier 1, forcing the lubricating oil to be accurately and quantitatively delivered to the meshing area of ​​the planetary gear 4 through the lubrication column 65 that penetrates the planet carrier 1, thus completing the direct lubrication of the planetary gear 4; as the planetary gears continue to rotate, the lubricating oil further diffuses to the meshing surface with the eccentric sun gear 2, achieving synchronous and sufficient lubrication of the meshing surfaces of the eccentric sun gear 2 and the planetary gear 4. The lubrication process starts and stops automatically with the rotation speed of the shaft 3. Lubrication starts when the shaft 3 rotates and stops when it stops. No manual intervention is required throughout the process. This ensures that all friction pairs (such as planetary gear 4 and eccentric sun gear 2, planetary gear 4 and flexible internal gear ring 11) are fully lubricated, and significantly reduces wear, effectively improving the reliability and service life of the planetary gear 4 transmission.

[0040] In one embodiment, such as Figures 3 to 4As shown, the lubrication unit 6 also includes an oil filler cap 66 disposed on the end face of the planetary carrier 1 away from the lubrication post 65; the lubrication post 65 has multiple evenly distributed oil drain holes 651 on its side near the planetary gear 4. Understandably, an opening (not shown) is provided on the side of the planetary carrier 1 away from the lubrication post 65, and the opening is threadedly connected to the oil filler cap 66. The oil filler cap 66 can be opened by rotation, and lubricating oil can be added to the planetary carrier 1 through the opening. This structure allows operators to easily open the oil filler cap 66 by simple rotation, conveniently adding lubricating oil to the inner cavity of the planetary carrier 1, avoiding the tedious disassembly of complex components; at the same time, the multiple evenly distributed oil drain holes 651 on the lubrication post 65 ensure that the lubricating oil seeps out accurately and evenly under pressure, directly covering the planetary gear 4 and the meshing surface with the eccentric sun gear 2, achieving lubrication without dead angles.

[0041] In one embodiment, such as Figures 5 to 6 As shown, the control unit 5 includes a transmission unit 52 linked to the surface of the rotating shaft 3, a rotating ring 53 rotatably connected to the inner wall of the planetary carrier 1, a fixing ring 51 disposed around the rotating ring 53 and fixedly connected to the inner wall of the planetary carrier 1, a disk 54 fixedly connected to the end face of the rotating ring 53 away from the lubrication column 65, and a plurality of push plates 57 disposed on the end face of the fixing ring 51 away from the lubrication column 65; the push plate 57 includes a connecting rod 571 slidably mounted in a transverse groove 56 on the planetary carrier 1, a pressing plate 572 connecting the connecting rod 571, and a sliding rod 573 vertically connected to the end of the connecting rod 571 away from the pressing plate 572; the disk 54 has a plurality of arc-shaped grooves 55, and the sliding rod 573 is inserted into the arc-shaped grooves 55.

[0042] Understandably, the control unit 5 achieves automation and precise control of the lubrication process through precise mechanical linkage: when the rotating ring 53 rotates, it synchronously drives the disc 54 to rotate. Since the sliding rod 573 is limited by the transverse groove 56, the arc-shaped groove 55 on the disc 54 continuously abuts against the sliding rod 573, forcing the connecting rod 571 to move linearly away from the rotating ring 53, thereby driving the extrusion plate 572 to precisely extrude the annular extrusion airbag 62. This design efficiently converts the rotational kinetic energy of the rotating shaft 3 into linear mechanical action, ensuring that the lubrication response is synchronized with the rotational speed. The curved surface design and uniform layout of the arc-shaped groove 55 ensures the uniform distribution of extrusion force, preventing local overload damage to the annular extrusion airbag 62 and making the lubricating oil output stable and controllable.

[0043] In one embodiment, such as Figures 9 to 10As shown, the transmission unit 52 includes an active plate 521 hinged to the surface of the rotating shaft 3, a rubber rope 522 fixedly connected between the active plate 521 and the rotating shaft 3, a driven plate 523 hinged to the inner wall of the rotating ring 53, and an abutment groove 524 formed on the side of the driven plate 523 near the rotating ring 53. Understandably, the active plate 521 hinged to the surface of the rotating shaft 3 swings outward under centrifugal force when the rotating shaft 3 rotates, pushing the driven plate 523 (hinged to the inner wall of the rotating ring 53) through the rubber rope 522 (providing restoring tension). The abutment groove 524, in conjunction with related components (such as the abutment rod 526 mentioned later), ensures that the driven plate 523 rigidly drives the rotating ring 53 to rotate in the initial stage to initiate lubrication.

[0044] In one embodiment, such as Figures 9 to 10 As shown, the transmission unit 52 further includes a movable groove 525 formed on the outer wall of the rotating ring 53 and communicating with the abutment groove 524, an abutment rod 526 slidably installed in the movable groove 525, a connecting spring 527 abutting between the abutment rod 526 and the inner wall of the movable groove 525, and a first torsion spring 528 installed between the rotating ring 53 and the driven plate 523. Understandably, the movable groove 525 is provided on the outer wall of the rotating ring 53, communicating with the abutment groove 524. The abutment rod 526 can slide on one side of the inner wall of the movable groove 525. The connecting spring 527 is disposed within the connecting spring 527, with one end of the connecting spring 527 abutting the abutment rod 526 and the other end abutting the other side of the inner wall of the movable groove 525.

[0045] Furthermore, understandably, when the rotating shaft 3 rotates, the active plate 521, hinged to the surface of the rotating shaft 3, swings open at the hinged position under the action of centrifugal force, and the active plate 521 abuts against the driven plate 523. Since the abutting rod 526 is inserted in the abutting groove 524 at this time, the driven plate 223 cannot swing at the hinged position with the rotating ring 23. Under the push of the active plate 221, the rotating ring 23 rotates together.

[0046] When the rotating ring 53 rotates with the rotating shaft 3, the rotating ring 53 drives the disk 54 to rotate synchronously (e.g., Figures 5 to 6As shown, because the sliding rod 573 on the push plate 57 is restricted in displacement by the transverse groove 56, the arc groove 55 on the disk 54 continuously abuts against the sliding rod 573, forcing the push plate 57 and the extrusion plate 572 to move away from the rotating ring 53 along the transverse groove 56; when the extrusion plate 572 moves, it abuts against and extrudes the annular extrusion air bladder 62, causing the gas in the air bladder to enter the annular expansion air bladder 63 through the air supply pipe 64, causing the expansion air bladder to expand and apply pressure to the lubricating oil in the planetary carrier 1. Under pressure, the lubricating oil is discharged through the oil drain hole 651 of the lubrication column 65, thus achieving lubrication of the planetary gears; as the planetary gears continue to rotate, the lubricant further diffuses to the eccentric sun gear 2 and the flexible internal gear ring 11, forming full-coverage lubrication. This lubrication mechanism is automatically activated with the rotation of the rotating ring 53, ensuring sufficient and uniform lubrication, avoiding excessive waste, and improving maintenance convenience and reliability.

[0047] When the abutment rod 526 is pushed to the left (radially of the rotating ring 53) within the abutment groove 524, the driving plate 521 no longer abuts the driven plate 523. Under the action of the first torsion spring 528, the driven plate 523 swings around its hinge point at a certain angle, causing the driving plate 521 to be unable to contact the driven plate 523 when it continues to rotate, thereby stopping the rotating ring 53 from rotating. After the rotating ring 53 stops, the lubrication mechanism immediately terminates and no more oil is discharged, achieving precise adaptive start-stop control and completely avoiding the need for manual intervention.

[0048] In one embodiment, such as Figure 7 , Figure 8 , Figure 9 , Figure 12 , Figure 13 As shown, a connecting groove 511 is provided on the inner wall of the fixed ring 51, and a spiral groove 531 is provided on the outer wall of the rotating ring 53; the self-lubricating composite planetary gear transmission mechanism also includes a limiting component 7 disposed inside the planetary carrier 1, the limiting component 7 including a push rod 73 with a through hole 74, a moving block 75 slidably mounted on the inner wall of the planetary carrier 1, an L-shaped rod 76 connecting the moving block 75, a locking block 78 hinged to the L-shaped rod 76, and a return spring 77; one end of the push rod 73 is slidably connected to the connecting groove 511, and the other end of the push rod 73 is slidably connected to the spiral groove 531; the return spring 77 abuts against the L-shaped rod 76 and the inner wall of the connecting groove 511. Understandably,

[0049] In one embodiment, such as Figures 12 to 13As shown, the limiting assembly 7 further includes a fixing block 79 fixedly connected to the end side wall of the L-shaped rod 76 and abutting against the locking block 78, and a second torsion spring 710 hinged to the end face of the locking block 78 away from the fixing block 79; it also includes a tension spring 711, one end of which is fixedly connected to the inner wall of the connecting groove 511, and the other end of which is connected to the side wall of the push rod 73. Understandably, the limiting assembly prevents excessive oil supply and avoids oil waste.

[0050] When the rotating shaft 3 rotates, the active plate 521 hinged to its surface swings open around the hinge point under the action of centrifugal force, pushing the moving block 75 to move closer to the fixed ring 51, and causing the L-shaped rod 76 fixed thereto to move synchronously; at the same time, the rotating shaft 3 drives the rotating ring 53 to rotate, causing the push rod 73, which is slidably installed in the spiral groove 531 on the surface of the rotating ring 53, to slide to the left along the groove. When the push rod 73 moves to the relative position of the locking block 78, the push rod 73 abuts against the inclined surface of the locking block 78, forcing the locking block 78 to swing to the left around its hinge point with the L-shaped rod 76 (at this time, the second torsion spring 710 stores energy); when the locking block 78 completely passes through the through hole 74 of the push rod 73, under the reset action of the second torsion spring 710, the locking block 78 rotates and resets, and the locking block 78 abuts against the right side of the push rod 73, thereby limiting the push rod 73.

[0051] After the rotating shaft 3 stops rotating, the active plate 521 returns to its original position closer to the rotating shaft 3 under the tension of the rubber rope 522. The active plate 521 disengages from the moving block 75. The moving block 75, having lost its thrust, moves the locking block 78 away from the fixed ring 51 under the elastic force of the return spring 77, via the L-shaped rod 76, until the locking block 78 is completely disengaged from the contact range of the push rod 73. At this time, the push rod 73 moves to the right under the tension of the tension spring 711. Simultaneously, because the push rod 73 slides to the right within the spiral groove 531 on the surface of the rotating ring 53, it causes the rotating ring 53 to rotate in the opposite direction. This, in turn, controls the push plate 57 to return to its original position through the linkage structure of the disc 54 and the arc groove 55, preventing the push plate 57 from squeezing the annular compression airbag 62. Finally, the power supply to the lubrication system is released, ensuring that all components return to their initial positions in the stopped state, preparing for the next lubrication cycle. The operator only needs to open the oil filler cap 66 to check the lubricating oil level and add oil as needed.

[0052] In one embodiment, such as Figure 2As shown, the self-lubricating composite planetary gear transmission mechanism further includes an outer ring 8, an inner ring 9, a bearing 10 connecting the outer ring 8 and the inner ring 9, a flexible internal gear ring 11 meshing with the planetary gear 4, and an elastic connector 12 connecting the inner ring 9 and the flexible internal gear ring 11. Understandably, driven by the eccentric sun gear 2, the planetary gear 4 drives the flexible internal gear ring 11 to generate a harmonic-like transmission. The annular spacing formed by the elastic connector 12 and the deformation of the flexible gear give the gear ring assembly significant buffering and filtering functions, effectively buffering external nonlinear impacts, filtering internal radial impacts, and filtering out instantaneous radial impacts and real-time vibrations, thereby achieving pure circumferential rotational output. This design not only significantly reduces operating noise but also greatly improves the load-bearing capacity and service life of the planetary gear 4.

[0053] The present invention also provides a filter, including the aforementioned self-lubricating composite planetary gear transmission mechanism. The self-lubricating composite planetary gear transmission mechanism can also be applied to speed increasers or transmission devices. In the filter of the above embodiments of the present invention, the self-lubricating composite planetary gear transmission mechanism includes a planet carrier 1, a rotating shaft 3 passing through the planet carrier 1 and sleeved with an eccentric sun gear 2, planetary gears 4 meshing with the eccentric sun gear 2 and rotatably mounted on the planet carrier 1, and a self-lubricating assembly. The self-lubricating assembly includes a lubrication part 6 and a control part 5 connected to the rotating shaft 3; the lubrication part 6 includes an annular fixing plate 61 fixedly connected to the inner wall of the planet carrier 1, an annular compression airbag 62 connected to the inner surface of the annular fixing plate 61, and an annular expansion joint connected to the outer surface of the annular fixing plate 61. The system includes an air bladder 63, an air supply pipe 64 connecting the annular compression air bladder 62 and the annular expansion air bladder 63, and a lubrication column 65 penetrating the planetary carrier 1. The control unit 5 is used to generate mechanical action when the rotating shaft 33 rotates to compress the annular compression air bladder 62 and force the gas in the annular compression air bladder 62 into the annular expansion air bladder 63, so that the annular expansion air bladder 63 expands and applies pressure to the lubricating oil in the planetary carrier 1. After being compressed, the lubricating oil is discharged to the planetary gear 4 through the lubrication column 65, so as to realize automatic lubrication between the eccentric sun gear 2 and the planetary gear 4.

[0054] 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 self-lubricating composite planetary gear transmission mechanism, characterized in that, It includes a planet carrier (1), a rotating shaft (3) passing through the planet carrier (1) and sleeved with an eccentric sun gear (2), a planetary gear (4) meshing with the eccentric sun gear (2) and rotatably mounted on the planet carrier (1), and a self-lubricating assembly, the self-lubricating assembly including a lubrication part (6) and a control part (5) connected to the rotating shaft (3); The lubrication section (6) includes an annular fixing plate (61) fixedly connected to the inner wall of the planetary carrier (1), an annular compression airbag (62) connected to the inner surface of the annular fixing plate (61), an annular expansion airbag (63) connected to the outer surface of the annular fixing plate (61), an air supply pipe (64) connecting the annular compression airbag (62) and the annular expansion airbag (63), and a lubrication column (65) penetrating the planetary carrier (1); The control unit (5) is used to generate mechanical action when the rotating shaft (3) rotates to squeeze the annular compression airbag (62) and force the gas in the annular compression airbag (62) into the annular expansion airbag (63) so that the annular expansion airbag (63) expands and applies pressure to the lubricating oil in the planet carrier (1). After being pressed, the lubricating oil is discharged to the planetary gear (4) through the lubrication column (65) to achieve automatic lubrication between the eccentric sun gear (2) and the planetary gear (4).

2. The self-lubricating composite planetary gear transmission mechanism according to claim 1, characterized in that, The lubrication part (6) also includes an oil filling cap (66) disposed on the end face of the planetary carrier (1) away from the lubrication column (65); a plurality of evenly distributed oil drain holes (651) are provided on the side of the lubrication column (65) near the planetary gear (4).

3. The self-lubricating composite planetary gear transmission mechanism according to claim 2, characterized in that, The control unit (5) includes a transmission unit (52) linked to the surface of the rotating shaft (3), a rotating ring (53) rotatably connected to the inner wall of the planetary carrier (1), a fixing ring (51) disposed around the rotating ring (53) and fixedly connected to the inner wall of the planetary carrier (1), a disc (54) fixedly connected to the end face of the rotating ring (53) away from the lubrication column (65), and a plurality of push plates (57) disposed on the end face of the fixing ring (51) away from the lubrication column (65); the push plate (57) includes a connecting rod (571) slidably mounted in a transverse groove (56) on the planetary carrier (1), an extrusion plate (572) connecting the connecting rod (571), and a sliding rod (573) vertically connected to the end of the connecting rod (571) away from the extrusion plate (572); The disk (54) has multiple arc-shaped grooves (55) at the beginning, and the sliding rod (573) is inserted into the arc-shaped grooves (55).

4. The self-lubricating composite planetary gear transmission mechanism according to claim 3, characterized in that, The transmission unit (52) includes an active plate (521) hinged to the surface of the rotating shaft (3), a rubber rope (522) fixedly connected between the active plate (521) and the rotating shaft (3), a driven plate (523) hinged to the inner wall of the rotating ring (53), and an abutment groove (524) formed on the side of the driven plate (523) near the rotating ring (53).

5. The self-lubricating composite planetary gear transmission mechanism according to claim 4, characterized in that, The transmission unit (52) further includes a moving groove (525) formed on the outer wall of the rotating ring (53) and communicating with the abutment groove (524), an abutment rod (526) slidably installed in the moving groove (525), a connecting spring (527) abutting between the abutment rod (526) and the inner wall of the moving groove (525), and a first torsion spring (528) installed between the rotating ring (53) and the driven plate (523).

6. The self-lubricating composite planetary gear transmission mechanism according to claim 5, characterized in that, The inner wall of the fixed ring (51) is provided with a connecting groove (511), and the outer wall of the rotating ring (53) is provided with a spiral sliding groove (531); the self-lubricating composite planetary gear transmission mechanism also includes a limiting component (7) disposed inside the planetary carrier (1), the limiting component (7) includes a push rod (73) with a through hole (74), a moving block (75) slidably mounted on the inner wall of the planetary carrier (1), an L-shaped rod (76) connected to the moving block (75), a locking block (78) hinged to the L-shaped rod (76), and a return spring (77); One end of the push rod (73) is slidably connected to the connecting groove (511), and the other end of the push rod (73) is slidably connected to the spiral groove (531); the return spring (77) abuts against the inner wall of the L-shaped rod (76) and the connecting groove (511).

7. The self-lubricating composite planetary gear transmission mechanism according to claim 6, characterized in that, The limiting assembly (7) further includes a fixing block (79) fixedly connected to the end side wall of the L-shaped rod (76) and abutting against the locking block (78), and a second torsion spring (710) hinged to the end face of the locking block (78) away from the fixing block (79); It also includes a tension spring (711), one end of which is fixedly connected to the inner wall of the connecting groove (511), and the other end of which is connected to the side wall of the push rod (73).

8. The self-lubricating composite planetary gear transmission mechanism according to claim 1, characterized in that, It also includes an outer ring (8), an inner ring (9), a bearing (10) connecting the outer ring (8) and the inner ring (9), a flexible internal gear ring (11) meshing with the planetary gear (4), and an elastic connector (12) connecting the inner ring (9) and the flexible internal gear ring (11).

9. A filter, characterized in that, Includes the self-lubricating composite planetary gear transmission mechanism as described in any one of claims 1-8.

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