Pin shaft, support assembly and gear box with lubrication oil circuit

Abstract

The present invention discloses a pin shaft, a support assembly and a gear box with a lubricating oil passage, wherein the side of the pin shaft is used to support the gear, the first flow channel inside the pin shaft extends from the end face of the pin shaft and is connected to the side face of the pin shaft; the two ends of the second flow channel are respectively connected to the side face of the pin shaft and the oil storage chamber, so that the lubricating oil flows between the side face of the pin shaft and the oil storage chamber; the positions where the first flow channel and the second flow channel are connected to the side face are both located in the area of ​​the side face used to support the gear; and the first flow channel and the second flow channel are located at different positions on the side face of the pin shaft. With the present invention, the lubricating oil can flow from the end face of the pin shaft to the side face to lubricate the area between the pin shaft and the gear. When there is too much lubricating oil, the lubricating oil can enter the oil storage chamber from the connection between the second flow channel and the pin shaft. The lubricating oil in the oil storage chamber can also flow from the connection between the second flow channel and the pin shaft to the space between the pin shaft and the gear for lubrication, so that the friction surface can be fully lubricated.

Description

Technical Field

[0001] The invention relates to a pin shaft, a supporting component and a gear box with a lubricating oil circuit. Background Art

[0002] As the wind power market places higher and higher demands on the intensiveness and power density of wind turbines, the original rolling bearing solution has gradually failed to meet the new requirements. Replacing rolling bearings with sliding bearings can fully utilize the characteristics of sliding bearings with high load capacity and small space requirements, and the cost is much lower than that of rolling bearings of the same specifications. The oil circuit design of sliding bearings is the key basis for the normal operation of sliding bearings.

[0003] In order for sliding bearings to operate normally, the formation of oil film on the friction pair surface is one of the key factors. The formation of oil film requires reasonable oil circuit design to meet the flow rate and lubrication effect of lubricating oil required for the formation of oil film, so as to fully lubricate the friction surface. Therefore, the rationality of sliding bearing oil circuit design is particularly important. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the defect of poor lubrication effect of sliding bearings in the prior art and to provide a pin shaft, a support assembly and a gear box with a lubrication oil circuit.

[0005] The present invention solves the above technical problems through the following technical solutions:

[0006] A pin shaft with a lubricating oil passage, wherein the side of the pin shaft is used to support a gear, and the interior of the pin shaft is provided with a first flow passage, a second flow passage and an oil storage chamber.

[0007] The first flow channel extends from the end surface of the pin shaft and communicates with the side surface of the pin shaft, so that the lubricating oil enters the side surface of the pin shaft from the end surface of the pin shaft through the first flow channel;

[0008] The two ends of the second flow channel are respectively connected to the side of the pin shaft and the oil storage chamber, so that the lubricating oil flows between the side of the pin shaft and the oil storage chamber;

[0009] Wherein, the positions where the first flow channel and the second flow channel are connected to the side are both located in the area of ​​the side for supporting the gear; and the first flow channel and the second flow channel are located at different positions on the side of the pin shaft.

[0010] In this solution, the end face and the side face of the pin shaft are connected through the first flow channel, and the connection position between the first flow channel and the side face is located in the area of ​​the gear. When the pin shaft is installed with a gear, the lubricating oil can flow from the end face of the pin shaft to the side face to lubricate the area between the pin shaft and the gear. An oil storage chamber is also provided inside the pin shaft, and the second flow channel connects the oil storage chamber with the side face of the pin shaft. When too much lubricating oil enters between the pin shaft and the gear from the first flow channel, the lubricating oil can enter the oil storage chamber from the connection between the second flow channel and the pin shaft. In addition, the connection between the second flow channel and the pin shaft can also serve as an oil outlet. When the pin shaft rotates to a higher position, the lubricating oil in the oil storage chamber can also flow from the connection between the second flow channel and the pin shaft to the area between the pin shaft and the gear for lubrication, so that the friction surface can be fully lubricated.

[0011] Preferably, the oil storage chamber extends along the central axis of the pin shaft; and the second flow channel extends along the radial direction of the pin shaft.

[0012] In this solution, the oil storage chamber is arranged along the central axis of the pin, so that the overall structure of the pin is more balanced and the rotation is more stable. The second flow channel extends along the radial direction of the pin, which is conducive to the inflow and outflow of lubricating oil.

[0013] Preferably, the first flow channel includes a main flow channel and at least one branch flow channel, the main flow channel extends from the end surface of the pin shaft along the axial direction of the pin shaft; the branch flow channel extends along the radial direction of the pin shaft, and the two ends thereof are respectively connected to the main flow channel and the side surface of the pin shaft;

[0014] In this solution, external lubricating oil can flow from the side of the pin shaft to different positions between the pin shaft and the gear through the main channel and the branch channel, so that the lubricating oil can be evenly distributed between the pin shaft and the gear, making the oil film evenly distributed and improving the lubrication performance.

[0015] Preferably, the position where the second flow channel communicates with the side surface is located between the positions where two branch flow channels communicate with the side surface.

[0016] In this solution, the position where the second flow channel is connected to the side is arranged between the positions where the two branch flow channels are connected to the side. When more lubricating oil flows out of the first flow channel, the second flow channel can receive lubricating oil from various places between the pin shaft and the gear, so that the excess lubricating oil can flow into the second flow channel and enter the oil storage chamber in time.

[0017] Preferably, there are a plurality of the second flow channels, and the plurality of the second flow channels are arranged around the circumference of the pin shaft.

[0018] In the present scheme, by adopting the above-mentioned structure, a plurality of second flow channels can be arranged inside the pin shaft, so that a plurality of lubricating oil flow holes can be provided in the circumferential direction of the side surface of the pin shaft. When the lubricating oil between the pin shaft and the gear flows into the pin shaft, the lubricating oil can flow in promptly and quickly; when the lubricating oil in the oil storage chamber flows between the pin shaft and the gear, a uniform oil film can be formed on the pin shaft and the gear.

[0019] Preferably, a third flow channel is further provided inside the pin shaft, and two ends of the third flow channel are respectively communicated with the oil storage chamber and the second flow channel.

[0020] In this solution, the lubricating oil in the oil storage chamber can be replenished into the second flow channel through the third flow channel, so that the oil storage chamber can provide auxiliary lubrication for the gear.

[0021] Preferably, along the axial direction of the pin shaft, the oil storage chamber has a first section, a second section and a third section, and the aperture of the second section is smaller than the aperture of the first section and smaller than the aperture of the third section;

[0022] The third flow channel extends along the axial direction of the pin shaft, and one end of the third flow channel is communicated with the side wall of the first section.

[0023] In this solution, along the axial direction of the pin shaft, the aperture of the oil storage chamber is large at both ends and small in the middle; thereby, one end of the third flow channel can be connected to the steps of the first section and the second section, forming an arrangement extending along the axial direction of the pin shaft; thereby, the lubricating oil in the oil storage chamber can enter the second flow channel from the third flow channel to provide auxiliary lubrication.

[0024] Preferably, the first section and the third section are respectively connected to two end surfaces of the pin shaft, wherein the connecting end surface of the first section and the pin shaft is the same end surface as the first flow channel and both end surfaces of the pin shaft.

[0025] In this solution, the first section and the third section are connected to the two end surfaces of the pin shaft, so that when the pin shaft is used in the gear box, when it reaches below the gear box oil level, a portion of the lubricating oil in the oil pool can be stored. As the pin shaft rotates to a higher position, the lubricating oil stored in the oil storage cavity can provide auxiliary lubrication for the sliding axial direction.

[0026] A support assembly, comprising a pin shaft with a lubricating oil passage as described above;

[0027] The support assembly further comprises at least one sliding bearing, the inner side surface of the sliding bearing is sleeved on the side surface of the pin shaft, and the outer side surface of the sliding bearing is used for sleeved gears.

[0028] In this solution, by adopting the above-mentioned pin shaft, the end face and the side face of the pin shaft are connected through the first flow channel, and the connection position of the first flow channel and the side face is located in the area of ​​the gear. When the pin shaft is installed with a gear, the lubricating oil can flow from the end face of the pin shaft to the side face to lubricate the sliding bearing. The pin shaft is also provided with an oil storage chamber inside, and the second flow channel connects the oil storage chamber with the side face of the pin shaft. When the lubricating oil entering the sliding bearing from the first flow channel is too much, the lubricating oil can enter the oil storage chamber from the connection point between the second flow channel and the pin shaft. In addition, the connection point between the second flow channel and the pin shaft can also serve as an oil outlet. When the pin shaft rotates to a higher position, the lubricating oil in the oil storage chamber can also flow from the connection point between the second flow channel and the pin shaft to the sliding bearing for lubrication, so that the friction surface can be fully lubricated.

[0029] Preferably, a plurality of the sliding bearings are sequentially sleeved on the side surface of the pin along the axial direction of the pin;

[0030] A through hole is provided on the side wall of the sliding bearing, and the connection point between the first flow channel and the side surface of the pin shaft corresponds to the through holes of the plurality of sliding bearings one by one;

[0031] The connecting point between the second flow channel and the side surface of the pin shaft is located between two adjacent sliding bearings.

[0032] A gearbox, comprising a pin shaft with a lubrication oil passage as described in any one of the above items, or comprising a support assembly as described in any one of the above items.

[0033] The positive and progressive effect of the present invention is that the end face and the side face of the pin shaft are connected through the first flow channel, and the connection position between the first flow channel and the side face is located in the area of ​​the gear. When the pin shaft is installed with a gear, the lubricating oil can flow from the end face of the pin shaft to the side face to lubricate the area between the pin shaft and the gear. The pin shaft is also provided with an oil storage chamber, and the second flow channel connects the oil storage chamber with the side face of the pin shaft. When too much lubricating oil enters between the pin shaft and the gear from the first flow channel, the lubricating oil can enter the oil storage chamber from the connection between the second flow channel and the pin shaft. In addition, the connection between the second flow channel and the pin shaft can also be used as an oil outlet. When the pin shaft rotates to a higher position, the lubricating oil in the oil storage chamber can also flow from the connection between the second flow channel and the pin shaft to the area between the pin shaft and the gear for lubrication, so that the friction surface can be fully lubricated. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 A schematic diagram of the structure of a support assembly provided by an embodiment of the present invention, wherein a sliding bearing is mounted on a pin shaft;

[0035] Figure 2 A schematic structural diagram of a support assembly provided by an embodiment of the present invention when a gear is installed.

[0036] Description of reference numerals:

[0037] Support assembly 10 , gear 20 , pin 100 , first flow channel 110 , main flow channel 111 , branch flow channel 112 , second flow channel 120 , oil storage chamber 130 , first section 131 , second section 132 , third section 133 , third flow channel 140 , circumferential oil groove 150 , sliding bearing 200 , through hole 210 . DETAILED DESCRIPTION

[0038] The present invention is further described below by way of examples, but the present invention is not limited to the scope of the examples.

[0039] The embodiment of the present invention provides a pin 100 having a lubricating oil passage, such as Figure 1 and Figure 2 As shown, the side of the pin shaft 100 is used to support the gear 20. Usually, a bearing is provided between the pin shaft 100 and the gear 20 to facilitate the rotation of the gear 20. In this embodiment, a sliding bearing 200 is provided between the pin shaft 100 and the gear 20, which has high load-bearing capacity, small space requirements and low cost.

[0040] The pin shaft 100 is provided with a first flow channel 110, a second flow channel 120 and an oil storage chamber 130. In a specific implementation, the first flow channel 110, the second flow channel 120 and the oil storage chamber 130 are all arranged inside the pin shaft 100 without interfering with each other, so that the lubricating oil circuit can be arranged inside the pin shaft 100 to avoid occupying the external space. In addition, the lubricating oil can also flow into the non-load-bearing area between the shaft pin and the inner hole of the gear 20 by arranging the oil outlet hole.

[0041] like Figure 2 As shown, the first flow channel 110 extends from the end surface of the pin shaft 100 and is connected to the side surface of the pin shaft 100, so that the lubricating oil enters the side surface of the pin shaft 100 from the end surface of the pin shaft 100 through the first flow channel 110; the two ends of the second flow channel 120 are respectively connected to the side surface of the pin shaft 100 and the oil storage chamber 130, so that the lubricating oil flows between the side surface of the pin shaft 100 and the oil storage chamber 130.

[0042] The positions where the first flow channel 110 and the second flow channel 120 are connected to the side of the pin shaft 100 are both located in the area of ​​the side of the pin shaft 100 for supporting the gear 20; and the first flow channel 110 and the second flow channel 120 are located at different positions on the side of the pin shaft 100. Specifically, the positions where the first flow channel 110 and the second flow channel 120 are connected to the side fall into the non-load-bearing area between the pin shaft 100 and the inner hole of the gear 20, so as to avoid weakening the supporting capacity of the pin shaft 100 for the gear 20, and at the same time, the inner hole of the gear 20 can be fully lubricated.

[0043] In a specific implementation, the communication port between the first flow channel 110 and the end surface of the pin shaft 100 can be used as an oil inlet hole, and the communication port between the first flow channel 110 and the side surface of the pin shaft 100 can be used as an oil outlet hole. The pin shaft 100 can be applied to the planetary gear 20, and the oil inlet hole can be the same as the oil path on the planetary carrier, so that the lubricating oil is transported to each oil outlet hole and enters the non-load-bearing area between the pin shaft 100 and the inner hole of the planetary gear 20. The communication port between the second flow channel 120 and the side surface of the pin shaft 100 and the communication port between the second flow channel 120 and the oil storage chamber 130, one of which is used as an oil inlet hole, and the other as an oil outlet hole, so that when too much lubricating oil enters between the pin shaft 100 and the gear 20 from the first flow channel 110, the lubricating oil can enter the oil storage chamber 130 from the connection between the second flow channel 120 and the pin shaft 100. In addition, the connection between the second flow channel 120 and the pin shaft 100 can also serve as an oil outlet. When the pin shaft 100 rotates to a higher position, the lubricating oil in the oil storage chamber 130 can also flow from the connection between the second flow channel 120 and the pin shaft 100 to the pin shaft 100 and the gear 20 for lubrication, so that the friction surface can be fully lubricated.

[0044] like Figure 1 and Figure 2 As shown, the oil storage chamber 130 extends along the central axis of the pin 100; the second flow channel 120 extends along the radial direction of the pin 100. Thus, the overall structure of the pin 100 is more balanced and the rotation is more stable; in addition, when there are multiple second flow channels 120, the distances from the oil storage chamber 130 to the side of the pin 100 of the multiple second flow channels 120 can be balanced, so that the lubricating oil passing through the second flow channel 120 can flow in and out evenly, which is convenient for discharging the lubricating oil at various places between the pin 100 and the gear 20, or for the lubricating oil to flow into the pin 100 and the gear 20 evenly. The second flow channel 120 extends along the radial direction of the pin 100, which is conducive to the inflow and outflow of the lubricating oil.

[0045] like Figure 1 and Figure 2 As shown, the first flow channel 110 includes a main flow channel 111 and at least one branch flow channel 112. The main flow channel 111 extends from the end surface of the pin shaft 100 along the axial direction of the pin shaft 100; the branch flow channel 112 extends along the radial direction of the pin shaft 100, and the two ends of the branch flow channel 112 are respectively connected to the main flow channel 111 and the side of the pin shaft 100;

[0046] The main flow channel 111 extends from the end face of the pin 100, so that the oil inlet hole of the first flow channel 110 can be the same as the oil path on the planetary carrier (not shown in the figure), which is convenient for introducing the lubricating oil into the first flow channel 110. In the specific implementation, there is one main flow channel 111, and multiple branch flow channels 112 can be set, so as to avoid affecting the structural strength of the pin 100. At the same time, the lubricating oil can flow to different positions between the pin 100 and the gear 20 through multiple branch flow channels 112, preferably to the non-load-bearing area, so that the lubricating oil can be evenly distributed between the pin 100 and the gear 20, so that the oil film is evenly distributed, and the lubrication performance is improved. Furthermore, the main flow channel 111 extends at a position close to the side of the pin 100, so as to reduce the flow path of the branch flow channel 112, so that the lubricating oil can quickly flow to the side of the pin 100.

[0047] like Figure 1 and Figure 2 As shown, the position where the second flow channel 120 is connected to the side of the pin is located between the positions where the two branch flow channels 112 are connected to the side of the pin. With such a design, when more lubricating oil flows out of the first flow channel 110, the second flow channel 120 can receive lubricating oil at various locations between the pin 100 and the gear 20, so that the excess lubricating oil flows into the second flow channel 120 and enters the oil storage chamber 130 in time.

[0048] In a specific implementation, two sliding bearings 200 are sleeved on the outer side of the pin shaft 100, the communication port between the second flow channel 120 and the side of the pin shaft is located in the middle of the friction surface of the two sliding bearings 200, and a circumferential oil groove 150 is formed between the two sliding bearings 200, and the second flow channel 120 is radially arranged inside the circumferential oil groove 150. During the operation of the sliding bearing 200, the lubricating oil reaches the central oil storage chamber through the oil return groove and the second flow channel 120. When the planetary pin shaft 100 rotates to a higher position, the lubricating oil stored in the oil storage chamber can provide auxiliary lubrication for the sliding bearing 200.

[0049] There are multiple second flow channels 120, and multiple second flow channels 120 are arranged around the circumference of the pin 100. Therefore, there can be multiple lubricating oil circulation holes 210 in the circumferential direction of the side of the pin 100. When the lubricating oil between the pin 100 and the gear 20 flows into the pin 100, the lubricating oil can flow in quickly and timely; when the lubricating oil in the oil storage chamber 130 flows between the pin 100 and the gear 20, a uniform oil film can be formed on the pin 100 and the gear 20. In a specific implementation, the main flow channel 111 of the first flow channel 110 is located between the two second flow channels 120 to avoid interference with the second flow channels 120.

[0050] like Figure 1 and Figure 2As shown, the pin shaft 100 is further provided with a third flow channel 140, and the two ends of the third flow channel 140 are respectively connected to the oil storage chamber 130 and the second flow channel 120. Thus, the lubricating oil in the oil storage chamber 130 can be replenished into the second flow channel 120 through the third flow channel 140, so that the oil storage chamber 130 can provide auxiliary lubrication for the gear 20. In a specific implementation, the third flow channel 140 and the first flow channel 110 are respectively located on both sides of the pin shaft 100, thereby reducing the impact on the structural strength of the pin shaft 100.

[0051] like Figure 1 and Figure 2 As shown, along the axial direction of the pin 100, the oil storage chamber 130 has a first section 131, a second section 132 and a third section 133, and the aperture of the second section 132 is smaller than the aperture of the first section 131 and smaller than the aperture of the third section 133; the third flow channel 140 extends along the axial direction of the pin 100, and one end of the third flow channel 140 is connected to the side wall of the first section 131. Preferably, the apertures of the first section 131 and the third section 133 are equal. Along the axial direction of the pin 100, the aperture of the oil storage chamber 130 is large at both ends and small in the middle; so that one end of the third flow channel 140 can be connected to the step of the first section 131 and the second section 132, forming an arrangement extending along the axial direction of the pin 100; so that the lubricating oil in the oil storage chamber 130 can enter the second flow channel 120 from the third flow channel 140 to provide auxiliary lubrication.

[0052] like Figure 1 and Figure 2 As shown, the first section 131 and the third section 133 are respectively connected to the two end faces of the pin 100, wherein the end face connecting the first section 131 and the pin 100 and the end faces of the first flow channel 110 and the pin 100 are the same end face. Therefore, when the pin 100 is applied to the gear box 20, when it reaches below the oil level of the gear box 20, a part of the lubricating oil in the oil pool can be stored. With the operation of the planetary pin 100, when the pin 100 rotates to a higher position, the lubricating oil stored in the oil storage cavity can provide auxiliary lubrication for the sliding axial direction.

[0053] The embodiment of the present invention further provides a support assembly 10, such as Figure 1 and Figure 2 As shown, the support assembly 10 includes a pin shaft 100 with a lubrication oil circuit as described above; the support assembly 10 also includes at least one sliding bearing 200, the inner side surface of the sliding bearing 200 is sleeved on the side surface of the pin shaft 100, and the outer side surface of the sliding bearing 200 is used to sleeve the gear 20.

[0054] By adopting the above-mentioned pin shaft 100, the end face and the side face of the pin shaft 100 are connected through the first flow channel 110, and the connection position of the first flow channel 110 and the side face is located in the area of ​​the gear 20. When the pin shaft 100 is installed with the gear 20, the lubricating oil can flow from the end face of the pin shaft 100 to the side face to lubricate the sliding bearing 200. The pin shaft 100 is also provided with an oil storage chamber 130 inside, and the second flow channel 120 connects the oil storage chamber 130 with the side face of the pin shaft 100. When the lubricating oil entering the sliding bearing 200 from the first flow channel 110 is too much, the lubricating oil can enter the oil storage chamber 130 from the connection point between the second flow channel 120 and the pin shaft 100. In addition, the connection between the second flow channel 120 and the pin shaft 100 can also serve as an oil outlet. When the pin shaft 100 rotates to a higher position, the lubricating oil in the oil storage chamber 130 can also flow from the connection between the second flow channel 120 and the pin shaft 100 to the sliding bearing 200 for lubrication, so that the friction surface can be fully lubricated.

[0055] like Figure 1 and Figure 2 As shown, a plurality of sliding bearings 200 are sequentially sleeved on the side surface of the pin shaft 100 along the axial direction of the pin shaft 100;

[0056] A through hole 210 is provided on the side wall of the sliding bearing 200, and the connection between the first flow channel 110 and the side of the pin shaft 100 corresponds to the through holes 210 of the plurality of sliding bearings 200 one by one;

[0057] The connecting point between the second flow channel 120 and the side surface of the pin shaft 100 is located between two adjacent sliding bearings 200 .

[0058] In specific implementation, Figure 1 and Figure 2 As shown, the side of the pin 100 is preferably sleeved with two sliding bearings 200, and a through hole 210 is provided on the side wall of each sliding bearing 200, and the through hole 210 is preferably located in the non-load-bearing area of ​​the sliding bearing 200. And the through holes 210 on the sliding bearing 200 correspond one-to-one with the oil outlet holes of the first flow channel 110, so that the lubricating oil can enter between the sliding bearing 200 and the gear 20. The circumferential oil groove 150 is provided between the two sliding bearings 200, and the second flow channel 120 and the multiple communication ports on the side are also located between the two sliding bearings 200.

[0059] The embodiment of the present invention further provides a gear box 20, which includes a pin shaft 100 with a lubricating oil circuit as described in any one of the above items, or includes a support assembly 10 as described in any one of the above items.

[0060] Although the specific embodiments of the present invention are described above, it should be understood by those skilled in the art that this is only for illustration and the protection scope of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but these changes and modifications all fall within the protection scope of the present invention.

Claims

1. A pin shaft with a lubricating oil passage, characterized in that: The side of the pin shaft is used to support the gear, and the interior of the pin shaft is provided with a first flow channel, a second flow channel and an oil storage chamber. The first flow channel extends from the end surface of the pin shaft and communicates with the side surface of the pin shaft, so that the lubricating oil enters the side surface of the pin shaft from the end surface of the pin shaft through the first flow channel; The two ends of the second flow channel are respectively connected to the side of the pin shaft and the oil storage chamber, so that the lubricating oil flows between the side of the pin shaft and the oil storage chamber; Wherein, the positions where the first flow channel and the second flow channel are connected to the side surface are both located in the area of ​​the side surface for supporting the gear; and the first flow channel and the second flow channel are located at different positions on the side surface of the pin shaft; Along the axial direction of the pin shaft, the oil storage chamber has a first section, a second section and a third section, and the aperture of the second section is smaller than the aperture of the first section and smaller than the aperture of the third section.

2. The pin shaft with lubricating oil passage according to claim 1, characterized in that: The oil storage chamber extends along the central axis of the pin shaft; and the second flow channel extends along the radial direction of the pin shaft.

3. The pin shaft with lubricating oil passage according to claim 2, characterized in that: The first flow channel includes a main flow channel and at least one branch flow channel, wherein the main flow channel extends from the end surface of the pin shaft along the axial direction of the pin shaft; the branch flow channel extends along the radial direction of the pin shaft, and the two ends thereof are respectively connected to the main flow channel and the side surface of the pin shaft; And / or, there are multiple second flow channels, and the multiple second flow channels are arranged around the circumference of the pin shaft.

4. The pin shaft with lubricating oil passage according to claim 3, characterized in that: The position where the second flow channel is connected to the side surface is located between the positions where the two branch flow channels are connected to the side surface.

5. The pin shaft with a lubricating oil passage according to any one of claims 1 to 4, characterized in that: A third flow channel is also provided inside the pin shaft, and two ends of the third flow channel are respectively communicated with the oil storage chamber and the second flow channel.

6. The pin shaft with lubricating oil passage according to claim 5, characterized in that: The third flow channel extends along the axial direction of the pin shaft, and one end of the third flow channel is communicated with the side wall of the first section.

7. The pin shaft with lubricating oil passage according to claim 6, characterized in that: The first section and the third section are respectively connected to two end surfaces of the pin shaft, wherein the connecting end surface of the first section and the pin shaft is the same end surface as the first flow channel and both end surfaces of the pin shaft.

8. A support assembly, characterized in that: The support assembly comprises a pin shaft having a lubricating oil passage as claimed in any one of claims 1 to 7; The support assembly further comprises at least one sliding bearing, the inner side surface of the sliding bearing is sleeved on the side surface of the pin shaft, and the outer side surface of the sliding bearing is used for sleeved gears.

9. The support assembly according to claim 8, characterized in that A plurality of sliding bearings are sequentially sleeved on the side surface of the pin shaft along the axial direction of the pin shaft; A through hole is provided on the side wall of the sliding bearing, and the connection point between the first flow channel and the side surface of the pin shaft corresponds to the through holes of the plurality of sliding bearings one by one; The connecting point between the second flow channel and the side surface of the pin shaft is located between two adjacent sliding bearings.

10. A gear box, characterized in that: The gearbox comprises a pin shaft having a lubrication oil passage as claimed in any one of claims 1-7, or comprises a support assembly as claimed in any one of claims 8-9.

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