Gearbox transmission assembly, gearbox comprising gearbox transmission assembly and vehicle comprising gearbox transmission assembly

Abstract

The utility model relates to a gearbox transmission assembly, a gearbox comprising the gearbox transmission assembly and a vehicle. The gearbox transmission assembly comprises a main shaft, a transmission assembly and a transmission assembly, the transmission mechanism is sleeved on the main shaft; the flow guide shell is arranged on the main shaft in a sleeving mode, a first oil guide pipe, an oil storage cavity and a plurality of oil spraying pipes are formed in the flow guide shell, and the first oil guide pipe communicates the oil storage cavity with fluid outside the shell and is used for guiding lubricating oil provided by the outside into the oil storage cavity; the multiple oil spraying pipes are communicated between the oil storage cavity and the side, facing the transmission mechanism, of the flow guiding shell, and at least one of the first oil guiding pipe, the oil storage cavity and the oil spraying pipes forms a lubricating oil channel at the gear meshing position in the transmission mechanism and is used for guiding lubricating oil in the oil storage cavity to the transmission mechanism to lubricate the transmission mechanism. Therefore, the lubricating effect of the transmission mechanism is improved, and the lubricating effect of the transmission assembly of the gearbox is further improved.

Description

Technical Field

[0001] The present application generally relates to the field of vehicle mechanical technology. More specifically, the present application relates to a gearbox transmission assembly and a gearbox and a vehicle containing the gearbox transmission assembly. Background Art

[0002] In modern mechanical transmission systems, planetary gear trains are core transmission components widely used in various gearboxes, and the lubrication of planetary gear trains is a key factor in ensuring their long-term and reliable operation. However, there are many problems with the existing planetary gear train lubrication technology, which makes the process of planetary gear trains complex and costly.

[0003] First, the prior art requires opening an oil circuit on the planetary carrier, which not only increases the complexity of processing, but also significantly increases the manufacturing cost. In addition, in the process of guiding the lubricating oil to the planetary carrier, a dynamic sealing structure or other corresponding structures are often required to ensure the delivery of the lubricating oil, which further increases the complexity of the structure.

[0004] Secondly, the existing technology relies on centrifugal force to throw the lubricating oil in the planetary carrier to the position that needs lubrication. However, this method has obvious limitations: when the planetary carrier rotates at a low speed, the centrifugal force is not enough to effectively transport the lubricating oil in the planetary carrier to each lubrication point, resulting in a significant decrease in the lubrication effect, thereby affecting the performance and life of the transmission components.

[0005] Moreover, the prior art can only lubricate the planetary gear bearings, or lubricate the planetary gear bearings and the sun gear / planet gear meshing points at the same time, and there is no technical solution that can simultaneously lubricate the three key parts of the planetary gear bearings, the sun gear and planet gear meshing points, and the planet carrier bearings.

[0006] Therefore, a new type of gearbox transmission assembly with a planetary gear train is needed, which does not require a complex oil circuit, thereby simplifying the lubrication structure of the gearbox transmission assembly and making the gearbox transmission assembly easy to process; and can guide the lubricating oil to the position that needs lubrication without relying on centrifugal force, so that when the planet carrier rotates at a low speed, the lubrication effect of the planetary wheel bearing and the lubrication effect of the meshing point between the planetary wheel and the sun wheel can be guaranteed; and the three key parts of the planetary wheel bearing, the meshing point between the planetary wheel and the sun wheel, and the planet carrier bearing can be lubricated at the same time. In this way, the limitations of the existing technology are overcome, the lubrication effect of the gearbox transmission assembly is improved, and the processing cost of the gearbox transmission assembly is reduced. Utility Model Content

[0007] In view of this, the purpose of the present application is to provide a transmission component of a gearbox, a gearbox and a vehicle including the transmission component of the gearbox, so as to solve the problems that the existing transmission component of the gearbox has a complex structure and is difficult to process due to the need to open an oil passage on the transmission mechanism in the transmission component of the gearbox for lubrication, and to solve the problem that the lubrication effect of the transmission mechanism is affected because multiple parts of the transmission mechanism in the existing transmission component of the gearbox cannot be lubricated simultaneously.

[0008] The technical solution adopted in the present application is as follows:

[0009] In one embodiment of the present application, a transmission component of a gearbox is provided. The transmission component of the gearbox includes: a main shaft for receiving external input power; a transmission mechanism sleeved on the main shaft; a diversion housing, the diversion housing is sleeved on the main shaft, and a first oil pipe, an oil storage cavity and a plurality of spray pipes are formed in the diversion housing. The first oil pipe fluidly connects the oil storage cavity with the outside of the housing for introducing lubricating oil provided externally into the oil storage cavity; the plurality of spray pipes are communicated between the oil storage cavity and the side of the diversion housing facing the transmission mechanism, and at least one of the first oil pipe, the oil storage cavity and the spray pipes forms a lubricating oil passage at the gear meshing part in the transmission mechanism for guiding the lubricating oil in the oil storage cavity to the transmission mechanism to lubricate the transmission mechanism.

[0010] In one embodiment, the transmission mechanism includes a planet gear, a sun gear and a planet carrier. The planet gear is installed on the planet carrier and meshes with the sun gear. The diversion housing is sleeved on the planet carrier. The plurality of spray pipes include a first spray pipe for guiding the lubricating oil in the oil storage cavity to the meshing part of the planet gear and the sun gear for lubrication.

[0011] In one embodiment, the transmission mechanism includes a planet gear, a sun gear and a planet carrier. The transmission mechanism further includes a support pin for rotatably connecting the planet gear to the planet carrier and a first bearing installed between the planet gear and the support pin. The plurality of spray pipes include a second spray pipe for guiding the lubricating oil in the oil storage cavity to the support pin.

[0012] In one embodiment, an oil inlet hole and a second oil pipe for communicating the oil inlet hole with the outside of the support pin are formed inside the support pin. The oil inlet hole opens at one end of the support pin adjacent to the diversion housing and is arranged along the axial direction of the support pin. The oil inlet hole is used to introduce lubricating oil from the second spray pipe, and the second spray pipe is used to guide the lubricating oil in the oil inlet hole to the first bearing to lubricate the first bearing.

[0013] In one embodiment, the transmission mechanism includes a planet carrier and a second bearing installed between the planet carrier and the diversion housing, and the plurality of oil injection pipes include a third oil injection pipe for guiding the lubricating oil in the oil storage chamber to the second bearing to lubricate the second bearing.

[0014] In one embodiment, the transmission mechanism includes a planet carrier, and the diversion housing includes a first sleeved portion, a second sleeved portion and a connecting plate. The first sleeved portion and the second sleeved portion are in the shape of a cylindrical housing. The inner diameter of the first sleeved portion is larger than that of the second sleeved portion. The connecting plate is in the shape of an annular flat plate. The outer edge of the connecting plate is connected to the inside of the first sleeved portion, and the inner edge of the connecting plate is connected to the outside of the second sleeved portion. The first sleeved portion is sleeved on the main shaft, the second sleeved portion is sleeved on one end of the planet carrier, and the second bearing is installed between the second sleeved portion and the planet carrier.

[0015] In one embodiment, the first oil injection pipe, the second oil injection pipe and the third oil injection pipe are all opened in the second sleeved portion. The first oil injection pipe and the second oil injection pipe extend along their axial directions, and the third oil injection pipe extends along its radial direction.

[0016] In one embodiment, the first oil guiding pipe extends along the radial direction of the connecting plate, and the oil storage chamber is arranged at the connection between the connecting plate and the second sleeved portion.

[0017] Another embodiment of the present application also provides a gearbox, and the gearbox includes the above-mentioned gearbox transmission assembly.

[0018] Another embodiment of the present application also provides a vehicle, and the vehicle includes the above-mentioned gearbox.

[0019] In the technical solution of the present application, the first oil injection pipe, the second oil injection pipe and the third oil injection pipe are all opened in the diversion housing. The method of directly injecting lubricating oil from the diversion housing to the transmission mechanism is adopted, and there is no need to open an oil injection pipe in the transmission mechanism, so that the structural design of the transmission mechanism is simple, easy to process and the processing cost is reduced. Moreover, the first oil injection pipe, the second oil injection pipe and the third oil injection pipe can inject lubricating oil into the transmission mechanism at the same time, thereby improving the lubrication effect of the transmission mechanism, and further improving the lubrication effect of the gearbox transmission assembly. Description of the Drawings

[0020] To more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the accompanying drawings required for the embodiments. It should be understood that the following drawings only show some embodiments of the present application and should not be regarded as a limitation of the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0021] Figure 1 This is a schematic cross-sectional structure diagram of a transmission assembly provided for an embodiment of the present application.

[0022] Figure 2 For Figure 1 This is a schematic cross-sectional structure diagram of the transmission mechanism in the shown transmission assembly. Specific embodiments

[0023] The following will describe in detail specific embodiments of the present application in conjunction with the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, rather than all embodiments. Based on the description of the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present application.

[0024] In the description of the present application, unless otherwise clearly specified and limited, terms such as "set", "installed", "connected", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific situations.

[0025] The orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of this application is usually placed during use. It is only for the convenience of description and simplification of the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present application.

[0026] Terms such as "first", "second", "third", etc. are only used to distinguish elements with similar attributes, rather than indicating or implying relative importance or a specific order.

[0027] The term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion. In addition to including the listed elements, it may also include other elements not specifically listed.

[0028] Please refer to Figure 1and Figure 2 , this embodiment provides a transmission component 100 of a gearbox, including: a main shaft 10 for receiving externally input power; a transmission mechanism 20 sleeved on the main shaft 10; a diversion housing 30 sleeved on the main shaft 10, and a first oil conduit 31, an oil storage cavity 32 and a plurality of oil injection pipes are formed in the diversion housing 30. The first oil conduit 31 fluidly connects the oil storage cavity 32 with the outside of the diversion housing 30 for introducing the lubricating oil provided externally into the oil storage cavity 32; a plurality of oil injection pipes communicate between the oil storage cavity 32 and the side of the diversion housing 30 facing the transmission mechanism 20, and at least one of the first oil conduit 31, the oil storage cavity 32 and the oil injection pipes forms a lubricating oil passage at the gear meshing part in the transmission mechanism 20 for guiding the lubricating oil in the oil storage cavity 32 to the transmission mechanism 20 to lubricate the transmission mechanism 20.

[0029] Specifically, the main shaft 10 is the core shaft of the transmission component 100 of the gearbox, runs through the center of the entire transmission component 100 of the gearbox, and is directly connected to the power source for transmitting power to the transmission mechanism 20 sleeved on it. The transmission mechanism 20 is sleeved on the main shaft 10, and a part of it is sleeved inside the diversion housing 30. The transmission mechanism 20 is rotatably installed inside the diversion housing 30, coaxial with the main shaft 10, and rotates together with the main shaft 10 for transmitting the power input by the main shaft 10. The diversion housing 30 is sleeved on the main shaft 10, covering a part of the transmission mechanism 20, and a first oil conduit 31, an oil storage cavity 32 and a plurality of oil injection pipes are formed inside it, forming a lubricating oil flow system for realizing the diversion and storage of the lubricating oil.

[0030] Further, the first oil conduit 31 connects the oil storage cavity 32 with the fluid source outside the diversion housing 30, and the first oil conduit 32 introduces the lubricating oil provided externally into the oil storage cavity 32 to ensure the continuous supply of the lubricating oil. The oil storage cavity 32 is located inside the diversion housing 30 and stores the lubricating oil introduced by the first oil conduit 31. The oil storage cavity 32 guides the lubricating oil to the transmission mechanism 20 through a plurality of oil injection pipes. A plurality of oil injection pipes communicate with the oil storage cavity 32, and the nozzles of the plurality of oil injection pipes are respectively oriented towards the meshing part between the planet gear 21 and the sun gear 22, the first bearing 25 and the second bearing 26 in the transmission mechanism 20 to spray lubricating oil on the three parts in the transmission mechanism 20 to lubricate them.

[0031] The transmission mechanism 20 includes a planet gear 21, a sun gear 22 and a planet carrier 23. The planet gear 21 is installed on the planet carrier 23 and meshes with the sun gear 22. The diversion housing 30 is sleeved on the planet carrier 23, and the plurality of oil injection pipes include a first oil injection pipe 33 for guiding the lubricating oil in the oil storage cavity 32 to the meshing part between the planet gear 21 and the sun gear 22 for lubrication.

[0032] Specifically, the planetary gear 21 is located within the transmission mechanism 20 and is distributed around the sun gear 22. By meshing with the sun gear 22, it is used to change the transmission ratio, thereby achieving efficient power transmission and speed change of the transmission mechanism 20. The sun gear meshes with multiple planetary gears 21 to achieve power distribution and transmission. The planet carrier 23 is sleeved on the main shaft 10 and is located at the periphery of the transmission mechanism 20. It is used to support multiple planetary gears 21 and allows the planetary gears 21 to rotate freely.

[0033] Further, one end of the nozzle of the first oil injection pipe 33 is communicated with the oil storage chamber 32, and the other end of the nozzle faces the meshing position of the planetary gear 21 and the sun gear 22. And the lubricating oil is ejected from the first oil injection pipe 33 in the form of a thin stream, so as to ensure that the lubricating oil can be accurately delivered to the meshing position of the planetary gear 21 and the sun gear 22.

[0034] The transmission mechanism 20 further includes a support pin 24 for rotatably connecting the planetary gear 21 to the planet carrier 23 and a first bearing 25 installed between the planetary gear 21 and the support pin 24 for reducing friction. The plurality of oil injection pipes include a second oil injection pipe 34 for guiding the lubricating oil in the oil storage chamber 32 to the support pin 24.

[0035] Specifically, the support pin 24 is connected between the planet carrier 23 and the planetary gear 21 and is located on the central axis of the planetary gear 21. It is used to support the planetary gear 21 and allows the planetary gear 21 to rotate around it. The first bearing 25 is located between the planetary gear 21 and the support pin 24 and is used to reduce the friction when the planetary gear 21 rotates, thereby improving the transmission efficiency and stability of the transmission mechanism 20.

[0036] An oil inlet hole 241 and a second oil guide pipe 242 for communicating the oil inlet hole 241 with the outside of the support pin 24 are formed inside the support pin 24. The oil inlet hole 241 opens at one end of the support pin 24 adjacent to the diversion housing 30 and is arranged along the axial direction of the support pin 24. The oil inlet hole 241 is used to introduce the lubricating oil from the second oil injection pipe 34. The lubricating oil is ejected from the second oil injection pipe 34 in the form of a thin stream. The second oil injection pipe 34 is used to guide the lubricating oil in the oil inlet hole 241 to the first bearing 25 to lubricate the first bearing 25.

[0037] Specifically, the oil inlet hole 241 is arranged along the central axis of the support pin 24 and extends along the axial direction of the support pin 24 inside the support pin 24 to ensure that the lubricating oil can be evenly distributed into the first bearing 25 through the oil inlet hole 241. And the opening of the oil inlet hole 241 can be a full opening and an opening at any angle along the circumference of the oil inlet hole 241. In this embodiment, it is preferably a full opening, which is used to introduce the lubricating oil from the second oil injection pipe 34 and provide a lubricating oil channel for the first bearing 25.

[0038] Further, the second oil guiding pipe 242 is annular and distributed along the radial direction of the support pin 24. The inner ring of the second oil guiding pipe 242 is communicated with the oil inlet hole 241, and the outer ring of the second oil guiding pipe 242 is communicated with the outside of the support pin 24, which is used to guide the lubricating oil in the oil inlet hole 241 to the first bearing 25 to ensure that the first bearing 25 can be fully lubricated during the rotation of the planetary gear 21. Through the second oil guiding pipe 242, the lubricating oil can be accurately delivered to the contact surface of the first bearing 25, thereby reducing the friction and wear of the first bearing 25. The number of the second oil guiding pipes 242 can be one or more. In this embodiment, the number of the second oil guiding pipes 242 is preferably two, and they are distributed at positions corresponding to both ends of the first bearing 25 in the oil inlet hole 241 to ensure that the lubricating oil in the oil inlet hole 241 can be delivered to both ends of the first bearing 25, so as to lubricate the first bearing 25 more evenly.

[0039] The transmission mechanism 20 includes a second bearing 26 for reducing friction and installed between the planet carrier 23 and the diversion housing 30. The plurality of oil spraying pipes include a third oil spraying pipe 35 for guiding the lubricating oil in the oil storage cavity 32 to the second bearing 26 to lubricate the second bearing 26.

[0040] Specifically, the second bearing 26 is installed between the planet carrier 23 and the diversion housing 30, fixed on the outside of the planet carrier 23 and the inside of the diversion housing 30, and is used to reduce the friction between the planet carrier 23 and the diversion housing 30 to ensure the smooth operation of the planet carrier 23 during rotation.

[0041] The diversion housing 30 includes a first sleeving portion 36, a second sleeving portion 37 and a connecting plate 38. The first sleeving portion 36 and the second sleeving portion 37 are in the shape of a cylindrical shell. The inner diameter of the first sleeving portion 36 is larger than the inner diameter of the second sleeving portion 37. The connecting plate 38 is in the shape of an annular flat plate. The outer edge of the connecting plate 38 is connected to the inside of the first sleeving portion 36, and the inner edge of the connecting plate 38 is connected to the outside of the second sleeving portion 37. The first sleeving portion 36 is sleeved on the main shaft 10, the second sleeving portion 37 is sleeved on one end of the planet carrier 23, and the second bearing 26 is installed between the second sleeving portion 37 and the planet carrier 23.

[0042] Specifically, the first sleeving portion 36 is located at one end of the diversion housing 30 far from the transmission mechanism 20. The outer edge of the first sleeving portion 36 is connected to the second sleeving portion 37 through the connecting plate 38 to form an integral structure of the diversion housing 30. The second sleeving portion 37 is located at one end of the diversion housing 30 adjacent to the transmission mechanism 20.

[0043] Further, there is a gap between the first sleeving portion 36 and the second sleeving portion 37 of the diversion housing 30 and the main shaft 10.

[0044] The first fuel injection pipe 33, the second fuel injection pipe 34, and the third fuel injection pipe 35 are all provided in the second installation part 37. The first fuel injection pipe 33 and the second fuel injection pipe 34 extend along their axial directions, and the third fuel injection pipe 35 extends along its radial direction.

[0045] Specifically, the first fuel injection pipe 33 is divided into a first inlet end, a first pipe body, and a first outlet end. Among them, the first inlet end is connected to the oil storage cavity 32, and lubricating oil enters the first fuel injection pipe 33 through the first inlet end; the first pipe body extends along the axial direction of the second installation part 37 to avoid interfering with other components and ensure the smooth delivery of lubricating oil to the meshing position of the planet gear 21 and the sun gear 22; the first outlet end faces the meshing position of the planet gear 21 and the sun gear 22 to ensure that the lubricating oil can be directly sprayed onto the contact surface at the meshing position.

[0046] The second fuel injection pipe 34 is divided into a second inlet end, a second pipe body, and a second outlet end. Among them, the second inlet end is connected to the oil storage cavity 32, and lubricating oil enters the second fuel injection pipe 34 through the second inlet end; the second pipe body extends along the axial direction of the second installation part 37 to avoid interfering with other components and ensure the smooth delivery of lubricating oil to the oil inlet hole 241 of the support pin 24; the second outlet end faces the oil inlet hole 241 of the support pin 24 to ensure that the lubricating oil can be effectively delivered into the support pin 24.

[0047] The third fuel injection pipe 35 is divided into a third inlet section, a third pipe body, and a third outlet end. Among them, the third inlet end is connected to the oil storage cavity 32, and lubricating oil enters the second fuel injection pipe 34 through the third inlet end; the second pipe body is divided into a first section and a second section. The first section extends along the axial direction of the second installation part 37, and the second section extends along the radial direction of the second installation part 37 to avoid interfering with other components and ensure the smooth delivery of lubricating oil to the second bearing 26; the third outlet end faces the gap between the second installation part 37 of the guide housing 30 and the main shaft 10. The gap is adjacent to the second bearing 26, and the lubricating oil is ejected from the third outlet end in the third fuel injection pipe 35 in the form of a thin stream. The lubricating oil enters the second bearing 26 through the gap, thereby ensuring that the lubricating oil can be effectively delivered to the second bearing 26.

[0048] Furthermore, in the transmission mechanism 20, there can be multiple planet gears 21. The number of the first fuel injection pipe 33 and the second fuel injection pipe 34 can be the same as the number of the planet gears 21, or can be different from the number of the planet gears 21. The increase in the number of the first fuel injection pipe 33 and the second fuel injection pipe 34 can ensure the lubrication effect at the first bearing 25 and the meshing position of the planet gear 21 and the sun gear 22 even when the rotational speed of the transmission mechanism 20 is relatively low. In this embodiment, the number of the first fuel injection pipe 33 and the second fuel injection pipe 34 is preferably one.

[0049] The first oil conduit 31 extends along the radial direction of the connecting plate 38, and the oil storage cavity 32 is arranged at the connection of the connecting plate 38 and the second sleeved part 37.

[0050] Specifically, the oil storage cavity 32 can be formed by integral casting, or by opening an annular groove on the side of the connecting plate 38 away from the transmission mechanism 20 and adding an end cover to make it a sealed annular cavity structure. In this embodiment, the formation method of the oil storage cavity formed by opening an annular groove and adding an end cover is preferred. The present application also provides a gearbox, including the gearbox transmission assembly 100 described in any of the above embodiments.

[0051] The present application also provides a vehicle, including the above gearbox.

[0052] The above is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed in the present application should be covered by the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A gearbox transmission assembly (100), characterized in that: The gearbox transmission assembly (100) comprises: A main shaft (10) for receiving external input power; A transmission mechanism (20) sleeved on the main shaft (10); A flow guide housing (30), the flow guide housing (30) being sleeved on the main shaft (10), and having a first oil guide pipe (31), an oil storage chamber (32) and a plurality of oil injection pipes formed therein; the first oil guide pipe (31) connects the oil storage chamber (32) with an external fluid of the flow guide housing (30) and is used to introduce lubricating oil provided from the outside into the oil storage chamber (32); the plurality of oil injection pipes are connected between the oil storage chamber (32) and a side of the flow guide housing (30) facing the transmission mechanism (20); at least one of the first oil guide pipe (31), the oil storage chamber (32) and the oil injection pipe forms a lubricating oil passage at a gear meshing position in the transmission mechanism (20), and is used to guide the lubricating oil in the oil storage chamber (32) to the transmission mechanism (20) so as to lubricate the transmission mechanism (20).

2. The gearbox transmission assembly (100) according to claim 1, characterized in that: The transmission mechanism (20) comprises a planetary gear (21), a sun gear (22) and a planetary carrier (23); the planetary gear (21) is mounted on the planetary carrier (23) and meshes with the sun gear (22); the flow guide housing (30) is sleeved on the planetary carrier (23); and the plurality of oil injection pipes comprises a first oil injection pipe (33) for guiding lubricating oil in the oil storage chamber (32) to the meshing position between the planetary gear (21) and the sun gear (22) for lubrication.

3. The gearbox transmission assembly (100) according to claim 2, characterized in that: The transmission mechanism (20) comprises a planetary gear (21), a sun gear (22) and a planetary carrier (23). The transmission mechanism (20) further comprises a support pin (24) for rotatably connecting the planetary gear (21) to the planetary carrier (23) and a first bearing (25) installed between the planetary gear (21) and the support pin (24). The plurality of oil injection pipes comprises a second oil injection pipe (34) for guiding lubricating oil in the oil storage chamber (32) to the support pin (24).

4. The gearbox transmission assembly (100) according to claim 3, characterized in that: An oil inlet hole (241) and a second oil guide pipe (242) connecting the oil inlet hole (241) with the outside of the support pin (24) are formed inside the support pin (24); the oil inlet hole (241) opens at one end of the support pin (24) adjacent to the flow guide housing (30) and is arranged along the axial direction of the support pin (24); the oil inlet hole (241) is used to introduce lubricating oil from the second oil injection pipe (34); the second oil injection pipe (34) is used to guide the lubricating oil in the oil inlet hole (241) to the first bearing (25) to lubricate the first bearing (25).

5. The gearbox transmission assembly (100) according to claim 4, characterized in that: The transmission mechanism (20) comprises a planet carrier (23) and a second bearing (26) installed between the planet carrier (23) and the flow guide housing (30), and the plurality of oil injection pipes comprises a third oil injection pipe (35) for guiding lubricating oil in the oil storage chamber (32) to the second bearing (26) to lubricate the second bearing (26).

6. The gearbox transmission assembly (100) according to claim 5, characterized in that: The transmission mechanism (20) comprises a planet carrier (23); the flow guide housing (30) comprises a first sleeve portion (36), a second sleeve portion (37) and a connecting plate (38); the first sleeve portion (36) and the second sleeve portion (37) are in the shape of cylindrical shells; the inner diameter of the first sleeve portion (36) is larger than the inner diameter of the second sleeve portion; the connecting plate (38) is in the shape of an annular flat plate; the outer edge of the connecting plate (38) is connected to the inside of the first sleeve portion (36); the inner edge of the connecting plate (38) is connected to the outside of the second sleeve portion (37); the first sleeve portion (36) is sleeved on the main shaft (10); the second sleeve portion (37) is sleeved on one end of the planet carrier (23); and the second bearing (26) is installed between the second sleeve portion (37) and the planet carrier (23).

7. The gearbox transmission assembly (100) according to claim 6, characterized in that: The first fuel injection pipe (33), the second fuel injection pipe (34) and the third fuel injection pipe (35) are all opened in the second sleeve portion (37); the first fuel injection pipe (33) and the second fuel injection pipe (34) extend along their axial direction, and the third fuel injection pipe (35) extends along their radial direction.

8. The gearbox transmission assembly (100) according to claim 6, characterized in that: The first oil guide pipe (31) extends along the radial direction of the connecting plate (38), and the oil storage chamber (32) is provided at the connection between the connecting plate (38) and the second sleeve portion (37).

9. A gearbox, characterized in that: The gearbox comprises a gearbox transmission assembly (100) according to any one of claims 1 to 8.

10. A vehicle, characterized in that: The vehicle comprises a gearbox as claimed in claim 9.

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