Self-lubricating gear shaft

Abstract

The application discloses a self-lubricating gear shaft, which comprises a main shaft rod, an axial flow fan disc, a slip ring group, a grinding ring sleeve and a self-lubricating assembly. The main shaft rod is internally provided with a shaft hole, and the axial flow fan disc is installed at both ends, forming opposite air flows in the shaft hole during rotation, cooperating with an inlet gap, a chip removal flow channel and a chip removal hole, and realizing the inhalation, flow guide and directional discharge of graphite dust. The slip ring group is fixedly connected with the grinding ring sleeve and supports the grinding ring sleeve to rotate on the surface of the self-lubricating assembly, the inner wall of the grinding ring sleeve is provided with a rough surface structure, and the graphite sliding vane of the self-lubricating assembly is continuously rubbed to generate lubricating dust. The graphite sliding vane is kept adhered under the radial extrusion of the tensioner, so that the continuous generation of the lubricating dust is ensured. The rotary guide part arranged on the surface of the main shaft rod can guide the air flow, so that the escaped dust is reattached and recycled. The structure realizes the automatic generation and uniform distribution of the lubricating dust, avoids manual injection or external oil supply, improves the lubrication automation level of the gear shaft, reduces the abrasion and prolongs the service life.

Description

Technical Field

[0001] This invention relates to the field of gear shaft technology, specifically to a self-lubricating gear shaft. Background Technology

[0002] Currently, in gear transmission systems, gear shafts inevitably experience wear and heat during long-term operation. To reduce frictional losses and extend service life, conventional gear shafts generally rely on external lubrication measures, including oil injection lubrication, oil bath lubrication, or grease coating.

[0003] In typical designs, some gear shafts have simple through holes or oil passages inside, allowing lubricant to enter the working area through manual lubrication. However, this type of design relies on manual maintenance, resulting in discontinuous lubrication supply. Furthermore, the lubricant is prone to evaporation or being ejected under high-temperature or high-speed conditions, leading to unstable lubrication performance. Other designs employ sealed oil baths or centralized oil supply systems, which can provide a relatively stable lubrication environment. However, these systems are complex and have high maintenance costs, making them unsuitable for long-term continuous operation or situations where maintenance conditions are limited.

[0004] However, existing technologies still have the following shortcomings:

[0005] Traditional gear shafts lack effective internal flow guidance and chip removal structures, and are usually lubricated only through oil holes or grease grooves. Lubricating particles are difficult to form a continuous distribution layer in the gear meshing area, resulting in insufficient lubrication of local contact surfaces and aggravating wear.

[0006] Existing gear shafts do not have the ability to generate and supply lubricating particles themselves, and must rely on external lubricating oil or manual replenishment periodically. Once lubrication is insufficient, the gear shaft is prone to dry friction and burning under high load and high speed conditions, which shortens its service life and is not conducive to achieving automated and maintenance-free operation.

[0007] External lubricating oil or grease is prone to splashing, evaporation, or being thrown out during operation. The dispersed lubricating particles cannot be recycled, resulting in high consumption of lubricating materials and poor lubrication continuity. Although some improved structures have grooves on the shaft surface to maintain lubrication, they lack effective flow guidance design, making it difficult to recycle lubricating particles and maintain stable lubrication performance over a long period.

[0008] In summary, existing gear shaft lubrication structures generally suffer from problems such as discontinuous lubrication supply, unstable lubrication effect, and low utilization rate of lubricating particles, making it difficult to meet the self-lubrication and automatic maintenance requirements of gear shafts under high-intensity and long-life operating conditions. Summary of the Invention

[0009] The present invention aims to solve one of the technical problems existing in the prior art or related technologies.

[0010] Therefore, the technical solution adopted in this invention is as follows: a self-lubricating gear shaft, comprising a main shaft, an axial flow fan, a slip ring assembly, a grinding ring sleeve, and a self-lubricating component. The main shaft has an inner shaft hole, and axial flow fans are fixedly installed at both ends to generate axial airflow in opposite directions during operation. The surface of the main shaft is provided with an inlet gap, a chip removal channel, and a chip removal hole for the introduction and discharge of graphite dust. The slip ring assembly is sleeved on the surface of the main shaft and fixedly connected to the grinding ring sleeve to support the rotation of the grinding ring sleeve. The self-lubricating component consists of alternating graphite slip flaps and tensioners, which can generate lubricating dust through friction during operation and distribute it evenly to the gear meshing area under the action of airflow, achieving automatic lubrication.

[0011] In a preferred embodiment, the slip ring assembly is further configured as follows: the slip ring assembly includes a forming ring, a rotating ring, a slip ring, a first roller group, and a second roller group. The forming ring is fixedly sleeved on the surface of the main shaft, the rotating ring is supported on the surface of the forming ring by the first and second roller groups, and the slip ring is fixedly installed inside the rotating ring, providing rotational support for the grinding ring sleeve. Specifically, an eccentric block is provided on the surface of the rotating ring to break the dynamic balance of the rotating ring, enabling the rotating ring and the grinding ring sleeve to rotate asynchronously during the rotation of the main shaft, thereby enhancing the friction between the graphite slip ring and the grinding ring sleeve and generating more graphite dust.

[0012] In a preferred embodiment, the inner side of the grinding ring sleeve is designed with a frosted, rough surface and is fixedly connected to one side of the rotating ring. Specifically, during asynchronous rotation of the grinding ring sleeve and the spindle, continuous friction is generated between the graphite sliding flap and the grinding ring sleeve, thereby generating fine and uniform graphite dust to ensure continuous lubrication supply.

[0013] In a preferred embodiment, the spindle surface is further configured such that the guide portion consists of several helical ridges arranged circumferentially. Specifically, during spindle rotation, the guide portion guides the airflow on the spindle surface to form axial flow, causing graphite dust dispersed on the outer periphery of the spindle to be re-adsorbed and distributed on the spindle surface, thereby improving the utilization rate of lubricating dust.

[0014] In a preferred embodiment, the inlet gap is arranged radially and communicates with the interior of the shaft hole, while the chip removal channel is arranged obliquely and communicates with the interior of the shaft hole. Specifically, when the main shaft rotates, the axial flow fan forms a high-speed airflow inside the shaft hole, increasing the flow velocity and reducing the pressure. Utilizing the Bernoulli effect, graphite dust is attracted into the shaft hole and, guided by the chip removal channel, evenly overflows into the working area through the chip removal holes, achieving directional distribution of lubricating dust.

[0015] In a preferred embodiment, the graphite slip flaps of the self-lubricating assembly are further configured such that they are distributed circumferentially and alternately arranged with the tensioner, with inclined surfaces on both sides of the graphite slip flaps abutting against the tensioner. Specifically, under the elastic compression of the tensioner, the graphite slip flaps generate stable radial pressure, ensuring that they always remain in close contact with the inner side of the grinding ring sleeve, thereby ensuring the continuous generation of lubricating dust.

[0016] In a preferred embodiment, the axial flow fan includes several circumferentially distributed blades, each with a specific installation angle. Specifically, during the rotation of the main shaft, the blades can generate opposing axial airflows, propelling graphite dust through the inlet gap into the self-lubricating assembly, thereby improving dust conveying efficiency.

[0017] In a preferred embodiment, the chip removal holes are further configured such that they are circumferentially distributed along the surface of the spindle. Specifically, graphite dust can be evenly discharged within the gear meshing area through multiple chip removal holes, achieving uniform distribution of lubricating dust and avoiding localized lack of lubrication.

[0018] In a preferred embodiment, the graphite flap is further configured such that the tensioner is made of wear-resistant graphite material and is an elliptical ring made of metal spring sheet, with a support foot on one side that engages with the inside of the inlet gap. Specifically, this configuration not only improves the wear resistance and lubrication stability of the graphite flap but also enables the tensioner to adaptively compensate after the graphite flap wears, thereby extending the service life of the self-lubricating assembly.

[0019] In summary, this invention achieves the automatic generation, introduction, discharge, and recycling of lubricating dust through the synergistic effect of the airflow drive of the axial flow fan, the frictional dust generation of the self-lubricating component, and the flow guiding structure on the main shaft surface. This solves the problem of insufficient lubrication during gear shaft operation and has the advantages of high degree of lubrication automation, uniform dust distribution, and strong long-term stability.

[0020] The beneficial effects achieved by this invention are as follows:

[0021] 1. In this invention, by setting a shaft hole, inlet gap, chip removal channel and chip removal hole inside the main shaft, and utilizing the opposing airflow generated in the shaft hole by the axial flow fan, negative pressure attraction and Bernoulli effect are formed, realizing the active introduction of external airflow and graphite dust, and uniformly overflowing into the working area of ​​the main shaft at the chip removal hole, thereby forming a continuous and stable lubricating dust layer on the gear meshing surface, effectively reducing friction and wear, and improving the service life of the gear shaft.

[0022] 2. In this invention, the combined structure of the slip ring assembly, grinding ring sleeve, and self-lubricating component enables continuous friction between the grinding ring sleeve and the graphite slip flap, automatically generating graphite dust, and maintaining stable contact of the graphite slip flap under the radial elastic compression of the tensioner. This structure ensures the continuous generation and stable supply of lubricating dust, avoiding the problem of traditional gear shafts requiring external lubrication or manual lubrication, and significantly improving the automation level of lubrication.

[0023] 3. In this invention, a swirl guide is provided on the surface of the main shaft, which, together with the airflow guidance effect generated by the axial flow fan, allows externally dispersed graphite dust to be guided back onto the surface of the main shaft, realizing the recycling of lubricating particles. Simultaneously, the asynchronous rotation design of the grinding ring sleeve further enhances the dust friction generation efficiency, and the overall structure maintains stable lubrication during operation, thereby improving the working reliability and long-term durability of the gear shaft. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of one embodiment of the present invention;

[0025] Figure 2 This is a schematic diagram of the surface structure of the spindle according to an embodiment of the present invention;

[0026] Figure 3 This is a partial cross-sectional structural diagram of the main shaft according to an embodiment of the present invention;

[0027] Figure 4 This is one embodiment of the present invention. Figure 2 A schematic diagram of the structure at point A;

[0028] Figure 5 This is a partial cross-sectional structural diagram of a slip ring assembly according to an embodiment of the present invention;

[0029] Figure 6 This is a schematic diagram of the structure of the grinding ring sleeve and self-lubricating assembly according to an embodiment of the present invention.

[0030] Figure label:

[0031] 1. Main shaft; 2. Axial flow fan; 3. Slip ring assembly; 4. Grinding ring sleeve; 5. Self-lubricating components;

[0032] 11. Key tooth section; 12. Rotary guide section; 13. Chip removal hole; 101. Shaft hole; 102. Inlet clearance; 103. Chip removal channel;

[0033] 31. Ring forming; 32. Rotating ring; 33. Slip ring; 34. First roller group; 35. Second roller group; 321. Eccentric block;

[0034] 51. Graphite sliding flap; 52. Tensioner. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0036] It should be understood that these descriptions are merely exemplary and are not intended to limit the scope of the invention.

[0037] The following describes, with reference to the accompanying drawings, some embodiments of a self-lubricating gear shaft provided by the present invention.

[0038] Combination Figures 1-6 As shown, the present invention provides a self-lubricating gear shaft, comprising a main shaft 1, an axial flow fan 2, a slip ring assembly 3, a grinding ring sleeve 4, and a self-lubricating component 5. The main shaft 1 has keyed teeth 11 on its surface for meshing with gears or couplings and transmitting torque. A shaft hole 101 is formed on the inner side of the main shaft 1 to create an airflow channel. The axial flow fan 2 is fixedly installed at both ends of the main shaft 1. During the rotation of the main shaft 1, the axial flow fan 2 can generate two opposing axial airflows inside the shaft hole 101, thereby producing negative pressure and high-speed flow effects within the shaft hole 101.

[0039] The slip ring assembly 3 is sleeved and installed on the surface of the main shaft 1, and one side of it is fixedly connected to one side of the grinding ring sleeve 4. Through this structure, the slip ring assembly 3 can provide support for the rotation of the grinding ring sleeve 4, enabling the grinding ring sleeve 4 to achieve low-friction rotation on the surface of the self-lubricating component 5.

[0040] The self-lubricating component 5 is fixedly installed on the surface of the main shaft 1 and located inside the grinding ring sleeve 4. The self-lubricating component 5 is composed of several graphite sliding flaps 51 and tensioners 52 arranged alternately in sequence. The graphite sliding flaps 51 provide lubricating powder, and the tensioners 52 apply elastic extrusion force to the graphite sliding flaps 51.

[0041] A flow inlet 102 is provided on the surface of the main spindle 1, which communicates with the inside of the shaft hole 101 and is located inside the grinding ring sleeve 4. This structure allows the flow inlet 102 to guide airflow and graphite dust into the interior of the main spindle 1. A chip removal channel 103 is also provided on the surface of the main spindle 1 to discharge airflow and graphite dust, and the end of the chip removal channel 103 is connected to a chip removal hole 13 located in the working area of ​​the main spindle 1 surface. Through this chip removal hole 13, graphite dust can be evenly discharged into the gear meshing working area.

[0042] In addition, the surface of the main spindle 1 is provided with several guide sections 12, which are distributed in the non-working area. One end of the guide section 12 is close to the side of the grinding ring sleeve 4 and the self-lubricating component 5, which is used to guide the airflow and increase the contact area between the graphite dust and the surface of the main spindle 1.

[0043] In this embodiment, the slip ring assembly 3 further includes a forming ring 31, a rotating ring 32, a slip ring 33, a first roller group 34, and a second roller group 35. The forming ring 31 is fixedly sleeved onto the surface of the main shaft 1. The rotating ring 32 is supported and mounted on the surface of the forming ring 31 by a plurality of circumferentially arranged first roller groups 34 and second roller groups 35. The slip ring 33 is fixedly mounted on the inner side of the rotating ring 32, serving as a support component for the grinding ring sleeve 4.

[0044] Specifically, an eccentric block 321 is fixedly installed on the surface of the rotating ring 32. The eccentric block 321 can break the dynamic balance of the rotating ring 32 and provide additional counterweight during the start-up and stop of the main spindle 1. As a result, during the operation of the main spindle 1, the rotating ring 32 and the grinding ring sleeve 4 can rotate asynchronously relative to the main spindle 1, thereby enhancing the friction effect between the graphite sliding flap 51 and the grinding ring sleeve 4.

[0045] In this embodiment, the inner side of the grinding ring sleeve 4 is made of frosted rough surface, and one side of it is fixedly connected to the side of the rotating ring 32. During the operation of the main shaft 1, due to the asynchronous rotation of the rotating ring 32 and the main shaft 1, the grinding ring sleeve 4 and the graphite sliding flap 51 continuously rub against each other, thereby generating a large amount of graphite dust during the friction process, which is then transported to the surface of the main shaft 1 by airflow to achieve automatic lubrication.

[0046] In this embodiment, the swirl guide 12 consists of several spiral convex ribs distributed circumferentially along the main shaft 1. During the rotation of the main shaft 1, the swirl guide 12 can guide the airflow on the surface of the main shaft 1 to flow axially, so that the graphite dust dispersed on the surface of the main shaft 1 is carried axially by the airflow and evenly distributed, thereby improving the adhesion effect of lubricating dust to the surface of the main shaft 1.

[0047] In this embodiment, the inlet gap 102 is arranged radially and communicates with the interior of the shaft hole 101, while the chip discharge channel 103 is arranged obliquely and communicates with the interior of the shaft hole 101.

[0048] During the rotation of the main shaft 1, the axial flow fan 2 generates a high-speed airflow inside the shaft hole 101, increasing the flow velocity and decreasing the pressure inside the shaft hole 101, thereby creating a negative pressure suction effect. This effect draws external airflow and graphite dust into the flow gap 102. As the graphite dust moves with the airflow inside the shaft hole 101, it adheres to the inner wall of the shaft hole 101 and eventually escapes through the chip discharge channel 103. The dust is then distributed at the chip discharge hole 13 to the working area of ​​the main shaft 1, achieving directional conveying and discharge of graphite dust.

[0049] In this embodiment, the graphite sliding flaps 51 are evenly distributed circumferentially and alternately arranged with the tensioners 52. The two sides of the graphite sliding flaps 51 that abut against the tensioners 52 have an inclined structure. During operation, the tensioners 52 can form an oblique elastic compression on both sides of the graphite sliding flaps 51, generating stable radial pressure, so that the graphite sliding flaps 51 always maintain close contact with the inner side of the grinding ring sleeve 4, thereby ensuring the continuous generation of graphite dust.

[0050] Furthermore, the graphite slip flap 51 is made of wear-resistant graphite material, possessing excellent self-lubricating properties and wear resistance. The tensioner 52 is composed of metal spring sheets in an elliptical ring structure, capable of adaptive elastic compensation for the graphite slip flap 51, ensuring its continued fit even after wear. A support foot is also provided on one side of the tensioner 52 for locking and fixing it to the inner side of the inlet gap 102, thereby enhancing the stability and support effect of the tensioner 52.

[0051] In this embodiment, the axial flow fan 2 includes several fan blades evenly distributed circumferentially, each fan blade having a specific installation angle. During the rotation of the main shaft 1, the fan blades can form opposing axial airflows, thereby pushing graphite dust through the inlet gap 102 into the self-lubricating assembly 5, achieving effective introduction of lubricating dust.

[0052] In this embodiment, the chip removal holes 13 are distributed circumferentially along the surface of the main shaft 1. During the gear meshing working area, graphite dust can be evenly discharged through multiple chip removal holes 13 and distributed to the area where the main shaft 1 meshes with the gear, thereby forming a uniform lubrication layer on the meshing contact surface, improving the lubrication effect and reducing wear.

[0053] Working principle and usage process of this invention:

[0054] The self-lubricating gear shaft of this invention, through the coordinated operation of the main shaft 1, axial flow fan 2, slip ring assembly 3, grinding ring sleeve 4, and self-lubricating component 5, achieves the automatic generation, introduction, distribution, and discharge of graphite dust during gear shaft operation, thereby forming a continuous and uniform self-lubricating effect at the meshing parts. Its working principle and usage process are as follows:

[0055] Rotation Drive and Airflow Formation: In operation, the main shaft 1 starts and drives the axial flow fan 2 to rotate. Several blades of the axial flow fan 2 generate two opposing axial airflows at a set angle. The airflow moves at high speed inside the shaft hole 101, creating a pressure difference. During this process, the inlet gap 102 radially connects to the shaft hole 101. Under the Bernoulli effect of increased airflow velocity and decreased pressure, external airflow and graphite dust are attracted into the main shaft 1 and further guided into the area between the grinding ring sleeve 4 and the self-lubricating assembly 5.

[0056] Grinding ring sleeve and graphite dust generation: The inner surface of the grinding ring sleeve 4 is designed with a frosted texture and is fixedly connected to one side of the rotating ring 32. When the main shaft 1 rotates, the slip ring assembly 3, supported by the forming ring 31, rotating ring 32, slip ring 33, and the first roller assembly 34 and the second roller assembly 35, causes the grinding ring sleeve 4 and the main shaft 1 to rotate asynchronously. During this process, continuous friction is generated between the grinding ring sleeve 4 and the graphite slipper 51, thereby generating a large amount of fine graphite dust.

[0057] Graphite dust introduction and airflow distribution: The generated graphite dust is drawn into the shaft hole 101 through the inlet gap 102 under the push of the opposing airflow, and moves along the inner wall of the shaft hole 101 with the airflow. Subsequently, the graphite dust is released with the airflow through the inclined chip discharge channel 103, and finally evenly discharged to the meshing area on the surface of the main shaft 1 through the chip discharge holes 13 arranged in the working area, so as to achieve lubrication supply.

[0058] Rotary guide section and external dust reuse: Several rotary guide sections 12 are provided on the surface of the main shaft 1 in the non-working area, which are spiral convex rib structures. During the rotation of the main shaft 1, the rotary guide section 12 can guide the outward airflow on the surface of the main shaft 1 to form axial movement, so that the externally dispersed graphite dust is re-adsorbed and attached to the surface of the main shaft 1, thereby improving the utilization rate of graphite dust.

[0059] The graphite sliding flaps and the tensioner adapt to each other; the self-lubricating assembly 5 is composed of several graphite sliding flaps 51 and tensioners 52 arranged alternately. The tensioner 52 is elliptical and ring-shaped, and its two sides abut against the inclined surfaces of the graphite sliding flaps 51, which can form radial elastic compression. During operation, the graphite sliding flaps 51 always remain in contact with the inner side of the grinding ring sleeve 4, and achieve adaptive compensation under the action of the tensioner 52 during the wear process, ensuring the continuous and stable generation of graphite dust.

[0060] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0061] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A self-lubricating gear shaft, characterized in that, It includes a main shaft (1), an axial flow fan (2), a slip ring assembly (3), a grinding ring sleeve (4), and a self-lubricating component (5). The main shaft (1) has a key tooth (11) on its surface, and a shaft hole (101) is opened on the inner side of the main shaft (1). The axial flow fan (2) is fixed at both ends of the main shaft (1) and is used to form two opposing axial airflows inside the shaft hole (101) during the rotation of the main shaft (1). The slip ring assembly (3) is sleeved on the surface of the main shaft (1) and one side is fixedly connected to one side of the grinding ring sleeve (4) to support the grinding ring sleeve (4) to rotate on the surface of the self-lubricating assembly (5). The self-lubricating component (5) is fixedly installed on the surface of the main shaft (1) and located inside the grinding ring sleeve (4). The self-lubricating component (5) includes a plurality of graphite sliding flaps (51) and tensioners (52) connected alternately in sequence. The main shaft (1) has an inlet gap (102) located inside the grinding ring sleeve (4) and connected to the shaft hole (101) for introducing airflow and graphite dust. The main shaft (1) has a chip discharge channel (103) for discharging airflow and graphite dust. The end of the chip discharge channel (103) is connected to a chip discharge hole (13) arranged in the working area of ​​the main shaft (1). The main shaft (1) has a plurality of guide sections (12) located in the non-working area on its surface, and one end of the guide section (12) is close to the side of the grinding ring sleeve (4) and the self-lubricating assembly (5); The slip ring assembly (3) includes a forming ring (31), a rotating ring (32), a slip ring (33), a first roller group (34), and a second roller group (35). An eccentric block (321) is fixedly installed on the surface of the rotating ring (32). The slip ring (33) is fixedly installed inside the rotating ring (32). The forming ring (31) and the slip ring (33) are supported by several first roller groups (34) and second roller groups (35) arranged around the circumference, so as to realize the low-friction rotation of the rotating ring (32) on the surface of the forming ring (31). The forming ring (31) is fixedly sleeved on the surface of the main shaft (1).

2. The self-lubricating gear shaft according to claim 1, characterized in that, The inner side of the grinding ring sleeve (4) is frosted and rough, and one side of the grinding ring sleeve (4) is fixedly connected to the side of the rotating ring (32).

3. A self-lubricating gear shaft according to claim 1, characterized in that, The spiral guide (12) is a helical convex structure arranged circumferentially around the surface of the main shaft (1).

4. A self-lubricating gear shaft according to claim 1, characterized in that, The inlet gap (102) is arranged radially and communicates with the inside of the shaft hole (101), and the chip discharge channels (103) are all obliquely communicated with the inside of the shaft hole (101).

5. A self-lubricating gear shaft according to claim 1, characterized in that, The graphite sliding flaps (51) are distributed circumferentially and alternately arranged with the tensioner (52) in sequence. The two sides of the graphite sliding flaps (51) are inclined at the contact points with the tensioner (52) to form radial pressure by elastically squeezing the two sides of the graphite sliding flaps (51) so that they remain in contact with the inner side of the grinding ring sleeve (4).

6. A self-lubricating gear shaft according to claim 1, characterized in that, The axial flow fan (2) includes several fan blades evenly distributed along the circumference. The installation angle is used to form opposing airflows during the rotation of the main shaft (1) to push graphite dust into the self-lubricating assembly (5) through the inlet gap (102).

7. A self-lubricating gear shaft according to claim 1, characterized in that, The chip removal holes (13) are distributed circumferentially along the surface of the main shaft (1) to form a uniform discharge of graphite dust in the working area of ​​gear meshing.

8. A self-lubricating gear shaft according to claim 1, characterized in that, The graphite flap (51) is made of wear-resistant graphite material, and the tensioner (52) is an elliptical ring structure formed by metal spring sheet, which is used to achieve adaptive wear compensation. The tensioner (52) has a support foot on one side for engaging with the inside of the inlet gap (102).

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