CN117419153B

CN117419153B - In-shaft oil guide pipe, transmission case motor branch lubricating structure and vehicle

Info

Publication number: CN117419153B
Application number: CN202311734285.7A
Authority: CN
Inventors: 王衡; 毛泽贤; 赵健涛; 张艳慧; 樊雪来; 金星月; 孙远烈
Original assignee: FAW Group Corp
Current assignee: FAW Group Corp
Priority date: 2023-12-18
Filing date: 2023-12-18
Publication date: 2024-03-15
Anticipated expiration: 2043-12-18
Also published as: CN117419153A

Abstract

The invention discloses an in-shaft oil guide pipe, a transmission motor branch lubricating structure and a vehicle, and relates to the technical field of transmission lubrication. The in-shaft oil guide pipe is applied to a gearbox input shaft and comprises a pipe body, wherein the pipe body is provided with an oil inlet end and an oil outlet end, an oil retainer wall is convexly arranged on the outer side wall of the pipe body at a position between the oil inlet end and the oil outlet end, and the oil retainer wall is used for being matched with the inner side wall of the gearbox input shaft so as to guide lubricating oil overflowed from the oil inlet end to flow to a front bearing arranged at one end of the gearbox input shaft corresponding to the oil inlet end and/or guide lubricating oil overflowed from the oil outlet end to flow to a spline structure formed by the matching of the gearbox input shaft and a motor shaft. The oil guide pipe in the shaft can guide lubricating oil to precisely flow to the front bearing and the spline structure, so that the front bearing and the spline structure can be fully lubricated.

Description

In-shaft oil guide pipe, transmission case motor branch lubricating structure and vehicle

Technical Field

The invention relates to the technical field of gearbox lubrication, in particular to an in-shaft oil guide pipe, a gearbox motor branch lubrication structure and a vehicle.

Background

A front bearing is arranged between one end of a gearbox input shaft and a gearbox shell of a hybrid electric vehicle on the market, an internal spline arranged at the other end of the gearbox input shaft is matched with an external spline on a motor shaft to form a spline structure, and the motor shaft drives the gearbox input shaft to rotate. In order to ensure that the input shaft of the gearbox continuously and stably rotates, a lubricating oil path is required to be configured to guide lubricating oil to lubricate the front bearing and the spline structure.

The part of the hybrid electric vehicle is provided with an oil guide pipe in the transmission input shaft, one end of the oil guide pipe is in a cantilever state which is fixedly inserted into the motor shaft, and lubricating oil introduced by the transmission shell is guided into the motor shaft through the oil guide pipe. In the process, part of lubricating oil overflows through the oil holes penetrating through the pipe wall of the oil guide pipe and reaches the front bearing and spline structure under the action of centrifugal force, so that the lubrication of the front bearing and the spline structure is realized.

Because there is great space between the lateral wall of leading oil pipe and the inside wall of gearbox input shaft, the lubricating oil that the oilhole overflowed disperses in this space, only has less part to reach the front bearing and the spline structure that are in this space both ends for front bearing and spline structure lubrication is insufficient, thereby leads to front bearing ablation, spline structure corrosion failure.

Disclosure of Invention

The invention aims to provide an in-shaft oil guide pipe which can guide lubricating oil to precisely flow to a front bearing and spline structure and realize sufficient lubrication of the front bearing and spline structure.

The invention further aims to provide a gear box motor branch lubrication structure which can guide lubricating oil to precisely flow to the front bearing and the spline structure and achieve sufficient lubrication of the front bearing and the spline structure.

It is still another object of the present invention to provide a vehicle that has a higher safety feature.

The embodiment of the invention provides a technical scheme that:

the in-shaft oil guide pipe comprises a pipe body, wherein the pipe body is provided with an oil inlet end and an oil outlet end, an oil retainer wall is convexly arranged on the outer side wall of the pipe body and positioned between the oil inlet end and the oil outlet end, the oil retainer wall is used for being matched with the inner side wall of the transmission input shaft so as to guide lubricating oil overflowed from the oil inlet end to flow to a front bearing arranged at one end of the transmission input shaft corresponding to the oil inlet end, and/or guide lubricating oil overflowed from the oil outlet end to flow to a spline structure formed by the transmission input shaft and a motor shaft in a matched mode.

In an alternative embodiment, a first oil overflow groove is concavely formed in the end wall of the oil inlet end, and extends from the inner side wall of the pipe body to the outer side wall of the pipe body; and/or the number of the groups of groups,

the end wall of the oil outlet end is concavely provided with a second oil overflow groove, and the second oil overflow groove extends from the inner side wall of the pipe body to the outer side wall of the pipe body.

In an alternative embodiment, a first oil guiding groove is concavely formed in the outer side wall of the oil inlet end, and extends from the end wall of the oil inlet end towards the oil retainer wall; and/or the number of the groups of groups,

and a second oil guide groove is concavely formed in the outer side wall of the oil outlet end, and extends from the end wall of the oil outlet end towards the oil retainer wall.

In an alternative embodiment, the number of the first oil guiding grooves is a plurality, and the plurality of the first oil guiding grooves are uniformly distributed circumferentially on the cross section of the pipe body; and/or the number of the groups of groups,

the number of the second oil guide grooves is multiple, and the second oil guide grooves are circumferentially and uniformly distributed on the cross section of the pipe body.

In an alternative embodiment, the number of oil deflector segments comprises two, two being respectively a first oil deflector segment disposed proximate to the oil inlet end and a second oil deflector segment disposed proximate to the oil outlet end;

the first oil retainer is used for guiding the lubricating oil overflowed from the oil inlet end to flow to the front bearing, and the second oil retainer is used for guiding the lubricating oil overflowed from the oil outlet end to flow to the spline structure.

In an alternative embodiment, the side wall of the first oil deflector flange is provided with a protruding engagement projection for engagement with the transmission input shaft.

In an alternative embodiment, the side wall of the second oil retainer is concavely provided with a sealing slot, the in-shaft oil guide pipe further comprises a sealing ring, the inner edge of the sealing ring is embedded into the sealing slot, and the outer edge of the sealing ring is used for propping against the inner side wall of the transmission input shaft.

In an alternative embodiment, the oil deflector ring has a first oil guiding end wall and a second oil guiding end wall facing away from each other, the first oil guiding end wall corresponding to the oil inlet end for guiding the lubricating oil overflowed from the oil inlet end to the front bearing; the second oil guide end wall corresponds to the oil outlet end and is used for guiding lubricating oil overflowed from the oil outlet end to flow to the spline structure.

The embodiment of the invention also provides a gear box motor branch lubricating structure, which comprises a gear box shell component, a front bearing, a gear box input shaft, a motor shaft and an in-shaft oil guide pipe, wherein the in-shaft oil guide pipe comprises a pipe body, the pipe body is provided with an oil inlet end and an oil outlet end, and an oil baffle ring wall is convexly arranged on the outer side wall of the pipe body at a position between the oil inlet end and the oil outlet end;

the pipe body is arranged in the gearbox input shaft, the oil retainer ring is matched with the inner side wall of the gearbox input shaft, and the gearbox input shaft is provided with a transmission end and a connection end; the front bearing is arranged between the transmission end and the gearbox shell, and the oil inlet end is in clearance fit with the gearbox shell component;

one end of the motor shaft extends into the connecting end and is matched with the connecting end to form the spline structure, and the oil outlet end extends into the motor shaft and is in clearance fit with the motor shaft; the pipe body is used for guiding lubricating oil output by the gearbox housing assembly into the motor shaft;

the oil retainer is used for guiding the lubricating oil overflowed from the oil inlet end to flow to a front bearing arranged at one end of the gearbox input shaft corresponding to the oil inlet end, and/or guiding the lubricating oil overflowed from the oil outlet end to flow to a spline structure formed by the cooperation of the gearbox input shaft and a motor shaft.

In an alternative embodiment, the gearbox housing assembly forms a first lubrication flow path together with the oil inlet end, the oil slinger wall and the drive end, the first lubrication flow path communicating the nozzle of the oil inlet end with the front bearing.

In an alternative embodiment, the gearbox housing assembly comprises a housing and an input oil pipe, wherein a matching cylinder is arranged on the housing, one end of the matching cylinder extends into the transmission end and is sleeved on the outer side wall of the oil inlet end, and one end of the input oil pipe extends into the other end of the matching cylinder and forms a first oil spilling gap with the end wall of the oil inlet end;

the first oil spilling gap is communicated with a gap between the matching cylinder body and the outer side wall of the oil inlet end, a gap between the matching cylinder body and the oil retainer ring wall and a gap between the transmission end and the shell in sequence to form the first lubrication flow passage.

the oil inlet end is characterized in that a first oil guide groove is concavely formed in the outer side wall of the oil inlet end, one end of the first oil guide groove is formed in the end wall of the oil inlet end, and the other end of the first oil guide groove extends to a gap between the matching cylinder body and the oil retainer wall.

In an alternative embodiment, one end of the motor shaft extending into the connecting end, the oil outlet end and the oil retainer wall together form a second lubrication flow passage, and a pipe orifice of the oil outlet end is communicated with the spline structure through the second lubrication flow passage.

In an alternative embodiment, a second oil spilling gap is formed between the end wall of the oil outlet end and the motor shaft, and the second oil spilling gap is sequentially communicated with a gap between the outer side wall of the oil outlet end and the inner side wall of the motor shaft, and a gap between the end wall of the motor shaft and the oil retainer wall, so that the second lubrication flow channel is formed.

In an alternative embodiment, a second oil overflow groove is concavely arranged on the end wall of the oil outlet end, and extends from the inner side wall of the pipe body to the outer side wall of the pipe body; and/or the number of the groups of groups,

the oil inlet end is characterized in that a second oil guide groove is concavely formed in the outer side wall of the oil inlet end, one end of the second oil guide groove is formed in the end wall of the oil outlet end, and the other end of the second oil guide groove extends to a gap between the end wall of the motor shaft and the oil retainer ring.

The embodiment of the invention also provides a vehicle which comprises the gear box motor branch lubricating structure.

Compared with the prior art, the oil deflector ring arranged on the outer side wall of the pipe body of the oil deflector ring can guide the lubricating oil overflowed from the oil inlet end to flow to the front bearing arranged at one end of the gearbox input shaft corresponding to the oil inlet end and guide the lubricating oil overflowed from the oil outlet end to flow to the spline structure formed by the cooperation of the gearbox input shaft and the motor shaft under the condition of being matched with the inner side wall of the gearbox input shaft, so that the overflowed lubricating oil is prevented from being dispersed in the inner space of the gearbox input shaft, and the lubricating oil can precisely flow to the front bearing and the spline structure. Therefore, the in-shaft oil guide pipe provided by the invention has the beneficial effects that: the lubricating oil can be guided to flow to the front bearing and the spline structure accurately, so that the front bearing and the spline structure are lubricated fully.

Drawings

In order to more clearly illustrate the technical solution of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described. It is appreciated that the following drawings depict only certain embodiments of the invention and are therefore not to be considered limiting of its scope. Other relevant drawings may be made by those of ordinary skill in the art without undue burden from these drawings.

Fig. 1 is a schematic structural diagram of a lubrication structure of a motor branch of a gearbox according to an embodiment of the present invention;

FIG. 2 is a schematic view of the structure of the oil guide tube in the shaft of FIG. 1;

FIG. 3 is an enlarged schematic view of area A of FIG. 1;

fig. 4 is an enlarged schematic view of region B in fig. 1.

Icon: 100-an in-shaft oil guide pipe; 110-a tube body; 111-an oil inlet end; 1111-a first oil spill groove; 1112-a first oil guide groove; 112-an oil outlet end; 1121-a second oil spill groove; 1122-a second oil guide groove; 120-a first slinger wall; 121-mating projections; 130-second slinger wall; 131-sealing the clamping groove; 132-a sealing ring; 140-an in-tube channel; 200-a transmission motor branch lubrication structure; 210-a transmission housing assembly; 211-a housing; 2111-mating barrel; 212-input oil pipe; 213-sealing ring; 220-front bearing; 230-a gearbox input shaft; 231-driving end; 232-connecting end; 233-an intra-axial passage; 240-motor shaft; 241-motor oil tube; 2411-an oil port; 242-a first oil guide hole; 243-a second oil guide hole; 250-spline structure; 260-a first oil spill gap; 270-second oil spill gap.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It will be apparent that the described embodiments are some, but not all, embodiments of the invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present invention, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "inner", "outer", "left", "right", etc. are based on the directions or positional relationships shown in the drawings, or the directions or positional relationships conventionally put in place when the inventive product is used, or the directions or positional relationships conventionally understood by those skilled in the art are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific direction, be configured and operated in a specific direction, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first," "second," and the like, are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.

In the description of the present invention, it should also be noted that, unless explicitly specified and limited otherwise, terms such as "disposed," "connected," and the like are to be construed broadly, and for example, "connected" may be either fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

The following describes specific embodiments of the present invention in detail with reference to the drawings.

Examples

Referring to fig. 1, fig. 1 is a schematic structural diagram of a lubrication structure 200 for a motor branch of a gearbox according to the present embodiment.

The transmission motor branch lubrication structure 200 provided in this embodiment includes a transmission housing assembly 210, a front bearing 220, a transmission input shaft 230, a motor shaft 240, and an in-shaft oil guide pipe 100, wherein one end of the motor shaft 240 extends into one end of the transmission input shaft 230 and is matched with the transmission input shaft to form a spline structure 250, one end of the transmission input shaft 230, which is far away from the motor shaft 240, is connected with the transmission housing assembly 210 through the front bearing 220, and the in-shaft oil guide pipe 100 is disposed in the transmission input shaft 230 to guide lubricating oil output by the transmission housing assembly 210 into the motor shaft 240.

Specifically, the transmission input shaft 230 has a driving end 231 and a connecting end 232, the front bearing 220 is sleeved on the outer side wall of the driving end 231, and the motor shaft 240 extends into the connecting end 232 and cooperates with the connecting end 232 to form a spline structure 250. It will be appreciated that the transmission input shaft 230 is a hollow structure having an intra-shaft passage 233 therethrough from a drive end 231 to a connecting end 232, and the intra-shaft oil conduit 100 is received in the intra-shaft passage 233. An inner spline is provided on the inner sidewall of the connection end 232, an outer spline is provided on the outer sidewall of the motor shaft 240, and the inner spline is engaged with the outer spline to form a spline structure 250.

Referring to fig. 2 in combination, fig. 2 is a schematic diagram of an in-shaft oil guide pipe 100.

The in-shaft oil guide pipe 100 provided in this embodiment includes a pipe body 110, where the pipe body 110 has an oil inlet end 111 and an oil outlet end 112, and the oil inlet end 111 corresponds to a driving end 231 of an input shaft 230 of the gearbox, that is, an end wall of the oil inlet end 111 faces the same as an end wall of the driving end 231; the oil outlet end 112 corresponds to the connecting end 232 of the gearbox input shaft 230, i.e. the end wall of the oil outlet end 112 faces the same end wall as the connecting end 232. The pipe body 110 is also hollow, and has an in-pipe passage 140 extending from the oil inlet end 111 to the oil outlet end 112.

The outer sidewall of the tube 110 is provided with raised oil deflector ribs between the oil inlet end 111 and the oil outlet end 112, which cooperate with the inner sidewall of the transmission input shaft 230 to direct oil spilled from the oil inlet end 111 to the front bearing 220 and/or to direct oil spilled from the oil outlet end 112 to the spline structure 250.

In this embodiment, the oil inlet end 111 is in clearance fit with the transmission housing assembly 210, and during the process of the lubricating oil output from the transmission housing assembly 210 flowing into the in-pipe passage 140 through the oil inlet end 111, part of the lubricating oil overflows from the clearance between the oil inlet end 111 and the transmission housing assembly 210, and thus enters the in-shaft passage 233 of the transmission input shaft 230.

After the lubricating oil overflowed from the oil inlet end 111 enters the in-shaft channel 233, the lubricating oil is intensively flowed to the front bearing 220 between the driving end 231 and the gearbox housing assembly 210 under the guiding action of the oil retainer wall, so that the lubricating oil is prevented from being scattered around the in-shaft channel 233, and the front bearing 220 is accurately and intensively lubricated.

The oil outlet 112 extends into the motor shaft 240, and similarly, is in clearance fit with the motor shaft 240, and during the process of the lubricating oil in the in-tube channel 140 of the tube body 110 flowing into the motor shaft 240 through the oil outlet 112, part of the lubricating oil overflows from the clearance between the oil outlet 112 and the motor shaft 240 and enters the in-shaft channel 233 of the gearbox input shaft 230.

After the lubricating oil overflowed from the oil outlet end 112 enters the in-shaft channel 233, the lubricating oil is intensively flowed to the spline structure 250 between the connecting end 232 and the motor shaft 240 under the guiding action of the oil retainer wall, so that the lubricating oil is prevented from being scattered around the in-shaft channel 233, and the spline structure 250 is accurately and intensively lubricated.

It should be noted that, in this embodiment, the lubricating oil overflows through the gap between the oil inlet end 111 and the transmission housing assembly 210, and the gap between the oil outlet end 112 and the motor shaft 240. In other embodiments, the lubrication oil of the oil inlet end 111 and the oil outlet end 112 may also overflow through other structures. For example, the oil can overflow from both ends by providing through holes on the side walls of the oil outlet end 112 and the oil inlet end 111.

The oil guide pipe 100 in the shaft provided in this embodiment has the oil retainer capable of guiding the lubricating oil overflowed from the oil inlet end 111 to flow toward the front bearing 220 in a concentrated manner, and guiding the lubricating oil overflowed from the oil outlet end 112 to flow toward the spline structure 250 in a concentrated manner, so as to achieve sufficient lubrication of the front bearing 220 and the spline structure 250. In other embodiments, the oil deflector may direct only the oil that overflows from the oil inlet 111 to the front bearing 220, or may direct only the oil that overflows from the oil outlet 112 to the spline structure 250, and may be configured according to practical application conditions.

In this embodiment, the number of oil slinger stages includes two oil slinger stages, namely a first oil slinger stage 120 disposed near the oil inlet end 111 and a second oil slinger stage 130 disposed near the oil outlet end 112, the first oil slinger stage 120 and the second oil slinger stage 130 being both engaged with the inner sidewall of the transmission input shaft 230. The first flinger stage 120 serves to direct oil spilled from the oil inlet end 111 to the front bearing 220 and the second flinger stage 130 serves to direct oil spilled from the oil outlet end 112 to the spline structure 250.

It can be seen that the first oil deflector stage 120 and the second oil deflector stage 130 in this embodiment are spaced apart in the axial direction of the tube body 110. In other embodiments, the oil deflector wall may be of unitary construction, in which case the oil deflector wall has first and second diverging oil guide end walls, the first oil guide end wall corresponding to the oil inlet end 111 for guiding oil spilled from the oil inlet end 111 to the front bearing 220; the second oil guiding end wall corresponds to the oil outlet end 112 for guiding the lubricating oil overflowed from the oil outlet end 112 to the spline structure 250.

In this embodiment, the sidewall of the first oil deflector stage 120 is provided with a mating protrusion 121, and the inner sidewall of the driving end 231 of the transmission input shaft 230 is provided with a mating recess in a recessed manner, and the mating protrusion 121 is embedded into the mating recess to limit the movement of the first oil deflector stage 120 relative to the transmission input shaft 230, i.e. to limit the movement of the in-shaft oil guide pipe 100 relative to the transmission input shaft 230.

It will be appreciated that by sizing the first oil deflector stage 120 and the gearbox input shaft 230, it is ensured that, in the case of mating protrusions 121 with mating recesses, the side wall of the first oil deflector stage 120 is in close contact with the inner side wall of the driving end 231, providing a sealing effect preventing oil spilled from the oil inlet end 111 from passing over the first oil deflector stage 120.

The second oil deflector ring 130 has a concave sealing groove 131 on its side wall, the in-shaft oil guide tube 100 further includes a sealing ring 132, the inner edge of the sealing ring 132 is embedded into the sealing groove 131, and the outer edge of the sealing ring 132 abuts against the inner side wall of the input shaft 230 of the gearbox. The seal 132 seals the gap between the side wall of the second slinger stage 130 and the inner side wall of the connecting end 232, preventing oil spilled from the oil outlet end 112 from passing over the second slinger stage 130.

In other embodiments, to enhance the sealing effect between the first oil deflector stage 120 and the inner sidewall of the driving end 231, a sealing ring 132 may be disposed between the sidewall of the first oil deflector stage 120 and the inner sidewall of the driving end 231. Also, in embodiments where the flinger flange is of unitary construction, the flinger flange may be provided with both structure fixed to the transmission input shaft 230 and structure or components to ensure sealing.

Even further, in some embodiments, the oil slinger stages may be integrally formed with the gearbox input shaft 230, i.e., the first 120 and second 130 oil slinger stages may also be integrally formed with the gearbox input shaft 230. In other words, the in-shaft oil conduit 100 and the transmission input shaft 230 may be of an integrally formed construction.

Referring to fig. 3 and fig. 4 in combination, fig. 3 is an enlarged schematic view of a region a in fig. 1, and fig. 4 is an enlarged schematic view of a region B in fig. 1.

For the specific flow guiding manner of the oil deflector stage to the lubricating oil overflowing from the oil inlet end 111, in this embodiment, the transmission housing assembly 210, the oil inlet end 111, the first oil deflector stage 120 and the driving end 231 together form a first lubrication flow path, and the first lubrication flow path communicates the nozzle of the oil inlet end 111 with the front bearing 220.

It will be appreciated that the nozzle of the oil inlet end 111 refers to the opening of the pipe interior channel 140 of the pipe body 110 at the oil inlet end 111. The oil inlet end 111 is in clearance fit with the transmission housing assembly 210, i.e., a gap exists between the nozzle of the oil inlet end 111 and the transmission housing assembly 210, so that the lubricating oil overflowed from the nozzle of the oil inlet end 111 can intensively reach the front bearing 220 through the first lubrication flow passage.

Specifically, the transmission housing assembly 210 includes a housing 211 and an input oil pipe 212, the housing 211 is provided with a mating cylinder 2111, one end of the mating cylinder 2111 extends into the driving end 231 and is sleeved on the outer sidewall of the oil inlet end 111, and one end of the input oil pipe 212 extends into the other end of the mating cylinder 2111 and forms a first oil spilling gap 260 with the end wall of the oil inlet end 111. The first oil spill gap 260 is communicated with the gap between the mating cylinder 2111 and the outer side wall of the oil inlet end 111, the gap between the mating cylinder 2111 and the first oil deflector wall 120, and the gap between the driving end 231 and the housing 211 in sequence, so as to form a first lubrication flow passage.

The a-gap in fig. 3 refers to the gap between the mating cylinder 2111 and the outer sidewall of the oil inlet end 111, in fact the gap between the inner sidewall of the mating cylinder 2111 and the outer sidewall of the oil inlet end 111; b clearance refers to the clearance between the mating cylinder 2111 and the flinger wall, in effect the clearance between the end wall of the end of the mating cylinder 2111 extending into the drive end 231 and the first flinger wall 120; the c-gap refers to a gap between the driving end 231 and the housing 211. It should be noted that, the housing 211 is in clearance fit with the driving end 231, and gaps exist between the inner side wall, the end wall and the outer side wall of the driving end 231 and the housing 211, and the gap c in fig. 3 refers to the sum of the three gaps.

In practice, the input oil pipe 212 delivers oil to the in-pipe passage 140 through the oil inlet end 111, and during this process, part of the oil flows into the first oil spill gap 260. Since the first oil spill gap 260 is sequentially communicated with the a-gap, the b-gap and the c-gap, the portion of the lubricating oil flowing into the first oil spill gap 260 can be concentrated and precisely reached to the front bearing 220 sequentially through the a-gap, the b-gap and the c-gap, thereby realizing sufficient lubrication of the front bearing 220.

It will be appreciated that in embodiments where the oil inlet end 111 is otherwise spilled, it is at least necessary to ensure that spilled oil is able to concentrate into the b-gap. For example, in embodiments where the oil feed end 111 has a through hole extending through its sidewall to allow oil to escape, the through hole may be located between the end wall of the end of the mating cylinder 2111 extending into the drive end 231 and the first oil deflector stage 120.

In order to raise the oil spilling amount of the oil inlet end 111 and avoid the interruption of the lubrication process of the front bearing 220, in this embodiment, a first oil spilling groove 1111 is concavely formed on the end wall of the oil inlet end 111, and the first oil spilling groove 1111 extends from the inner side wall of the pipe body 110 to the outer side wall of the pipe body 110, that is, the first oil spilling groove 1111 extends to the a-gap. The provision of the first oil spill groove 1111 increases the flow area of the first oil spill gap 260, thereby increasing the flow rate of the lubricating oil spilled from the first oil spill gap 260.

In addition, in this embodiment, a first oil guiding groove 1112 is further concavely disposed on the outer sidewall of the oil inlet end 111, one end of the first oil guiding groove 1112 is opened on the end wall of the oil inlet end 111, and the other end extends to the gap between the mating cylinder 2111 and the oil retainer wall. Equivalently, the first oil guiding groove 1112 extends from the first oil spilling gap 260 to the b gap on the outer side wall of the oil inlet end 111, and increases the flow area of the a gap, thereby improving the flow rate of the lubricating oil flowing through the a gap.

In this embodiment, the number of the first oil guiding grooves 1112 is three, and the three first oil guiding grooves 1112 are uniformly distributed circumferentially on the cross section of the tube 110. In other embodiments, the number of the first oil guiding grooves 1112 may be adaptively adjusted according to practical application conditions.

In order to ensure that the lubricating oil in the first oil spill gap 260 can flow into the gap b in a concentrated manner, in this embodiment, a sealing ring 213 is disposed between the outer sidewall of the input oil pipe 212 and the inner sidewall of the mating cylinder 2111, so as to seal the gap between the outer sidewall of the input oil pipe 212 and the inner sidewall of the mating cylinder 2111, and prevent the lubricating oil in the first oil spill gap 260 from flowing back to the housing 211 from the gap.

For the specific flow guiding manner of the oil deflector against the lubricating oil overflowing from the oil outlet 112, in this embodiment, the end of the motor shaft 240 extending into the connecting end 232, the oil outlet 112 and the second oil deflector 130 together form a second lubrication channel, and the orifice of the oil outlet 112 is communicated with the spline structure 250 through the second lubrication channel.

It will be appreciated that the orifice of the oil outlet 112, i.e., the inner tube passage of the finger tube body 110, is located at the opening of the oil outlet 112. The oil outlet 112 is in clearance fit with the motor shaft 240, i.e. a clearance exists between the nozzle of the oil outlet 112 and the motor shaft 240, so that the lubricating oil overflowed from the nozzle of the oil outlet 112 can intensively reach the spline structure 250 through the second lubrication flow passage.

Specifically, a second oil spilling gap 270 is formed between the end wall of the oil outlet 112 and the motor shaft 240, and the second oil spilling gap 270 is sequentially communicated with a gap between the outer side wall of the oil outlet 112 and the inner side wall of the motor shaft 240, and a gap between the end wall of the motor shaft 240 and the second oil retainer wall 130, so as to form a second lubrication flow channel.

It can be understood that the motor shaft 240 has a hollow structure, and a flow passage for guiding lubricating oil exists inside the hollow structure, and the oil outlet end 112 extends into the motor shaft 240 to communicate with the internal flow passage of the motor shaft 240. In fig. 4, the d gap refers to the gap between the outer sidewall of the oil end 112 and the inner sidewall of the motor shaft 240, the e gap refers to the gap between the end wall of the end of the motor shaft 240 extending into the connecting end 232 and the second oil deflector wall 130, and the second oil spilling gap 270 is sequentially communicated with the d gap and the e gap to form a second lubrication flow channel.

In practical applications, the in-tube channel 140 of the tube body 110 delivers the lubricant to the interior of the motor shaft 240 through the oil outlet 112, and during this process, part of the lubricant flows into the second oil-spilling gap 270. Since the second oil spill gap 270 is sequentially communicated with the d gap and the e gap, the portion of the lubricating oil flowing into the second oil spill gap 270 can be concentrated and precisely reached to the spline structure 250 sequentially through the d gap and the e gap, thereby achieving sufficient lubrication of the spline structure 250.

Likewise, in embodiments where the oil outlet 112 is otherwise spilled, it is at least necessary to ensure that spilled oil is able to concentrate into the e-gap. For example, in embodiments where the side wall of the oil outlet end 112 is perforated to allow oil to escape, the perforations may be located between the end wall of the end of the motor shaft 240 that extends into the connecting end 232 and the second oil deflector ledge 130.

Similarly, in order to raise the oil spilling amount of the oil outlet 112 and avoid the lubrication process of the spline structure 250 from cutting off, in this embodiment, a second oil spilling groove 1121 is concavely formed on the end wall of the oil outlet 112, and the second oil spilling groove 1121 extends from the inner side wall of the pipe body 110 to the outer side wall of the pipe body 110. I.e. the second oil spill groove 1121 extends to the d-gap. The provision of the second oil spill groove 1121 increases the flow area of the second oil spill gap 270, thereby increasing the flow rate of the lubricating oil spilled from the second oil spill gap 270.

In this embodiment, a second oil guiding groove 1122 is concavely formed on the outer side wall of the oil inlet end 111, one end of the second oil guiding groove 1122 is opened on the end wall of the oil outlet end 112, and the other end extends to the gap between the end wall of the motor shaft 240 and the oil retainer wall. The second oil guide groove 1122 extends from the second oil spill gap 270 to the e-gap on the outer side wall of the oil outlet end 112, and increases the flow area of the d-gap, thereby increasing the flow rate of the lubricating oil flowing through the d-gap.

In this embodiment, the number of the second oil guiding grooves 1122 is also three, and the three second oil guiding grooves 1122 are uniformly distributed circumferentially on the cross section of the pipe body 110. In other embodiments, the number of second oil guide grooves 1122 may be adaptively adjusted according to practical application conditions.

The lubricating oil flowing into the motor shaft 240 enters the motor oil pipe 241 arranged in the motor shaft 240 and is sprayed out through the oil port 2411 arranged on the motor oil pipe 241 to enter the inner cavity of the motor shaft 240. The side wall of the inner cavity of the motor shaft 240 is provided with a first oil guide hole 242 and a second oil guide hole 243 in a penetrating manner, and lubricating oil in the inner cavity lubricates the motor rotor through the first oil guide hole 242 and lubricates the rear bearing arranged between the motor shaft 240 and the motor housing 211 through the second oil guide hole 243.

In summary, the in-shaft oil guide pipe 100 and the transmission motor branch lubrication structure 200 provided in the present embodiment can guide the lubricating oil to flow to the front bearing 220 and the spline structure 250 accurately, so as to achieve sufficient lubrication of the front bearing 220 and the spline structure 250.

In addition, the present embodiment also provides a vehicle provided with the aforementioned transmission motor branch lubrication structure 200. The beneficial effects of benefiting from the lubricating structure 200 of the motor branch of the gearbox are that the vehicle provided by the embodiment has the characteristics of better lubricating effect and higher safety.

The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An in-shaft oil guide pipe applied to a gearbox input shaft (230), wherein the in-shaft oil guide pipe (100) comprises a pipe body (110), the pipe body (110) is provided with an oil inlet end (111) and an oil outlet end (112), an oil baffle ring wall is convexly arranged on the outer side wall of the pipe body (110) at a position between the oil inlet end (111) and the oil outlet end (112), and is used for being matched with the inner side wall of the gearbox input shaft (230) so as to guide lubricating oil overflowed from the oil inlet end (111) to flow to a front bearing (220) arranged at one end of the gearbox input shaft (230) corresponding to the oil inlet end (111), and/or guide lubricating oil overflowed from the oil outlet end (112) to flow to a spline structure (250) formed by matching the gearbox input shaft (230) and a motor shaft (240);

a first oil overflow groove (1111) is concavely formed in the end wall of the oil inlet end (111), and the first oil overflow groove (1111) extends from the inner side wall of the pipe body (110) to the outer side wall of the pipe body (110); and/or a second oil overflow groove (1121) is concavely arranged on the end wall of the oil outlet end (112), and the second oil overflow groove (1121) extends from the inner side wall of the pipe body (110) to the outer side wall of the pipe body (110);

the number of the oil retainer stages comprises two, namely a first oil retainer stage (120) which is arranged close to the oil inlet end (111) and a second oil retainer stage (130) which is arranged close to the oil outlet end (112);

the first oil deflector stage (120) is used for guiding the lubricating oil overflowed from the oil inlet end (111) to flow to the front bearing (220), and the second oil deflector stage (130) is used for guiding the lubricating oil overflowed from the oil outlet end (112) to flow to the spline structure (250);

the side wall of the second oil retainer ring (130) is concavely provided with a sealing clamping groove (131), the in-shaft oil guide pipe (100) further comprises a sealing ring (132), the inner edge of the sealing ring (132) is embedded into the sealing clamping groove (131), and the outer edge of the sealing ring (132) is used for propping against the inner side wall of the gearbox input shaft (230);

the oil retainer wall is provided with a first oil guide end wall and a second oil guide end wall which are opposite, the first oil guide end wall corresponds to the oil inlet end (111) and is used for guiding lubricating oil overflowed from the oil inlet end (111) to flow to the front bearing (220); the second oil guide end wall corresponds to the oil outlet end (112) and is used for guiding lubricating oil overflowed from the oil outlet end (112) to flow to the spline structure (250).

2. An in-shaft oil guide pipe according to claim 1, characterized in that the outer side wall of the oil inlet end (111) is concavely provided with a first oil guide groove (1112), the first oil guide groove (1112) extending from the end wall of the oil inlet end (111) towards the oil retainer wall; and/or the number of the groups of groups,

and a second oil guide groove (1122) is concavely formed in the outer side wall of the oil outlet end (112), and the second oil guide groove (1122) extends from the end wall of the oil outlet end (112) towards the oil retainer wall.

3. The in-shaft oil guide pipe according to claim 2, wherein the number of the first oil guide grooves (1112) is plural, and the plural first oil guide grooves (1112) are circumferentially uniformly distributed on the cross section of the pipe body (110); and/or the number of the groups of groups,

the number of the second oil guide grooves (1122) is a plurality, and the second oil guide grooves (1122) are uniformly distributed circumferentially on the cross section of the pipe body (110).

4. An in-shaft oil conduit according to claim 1, characterized in that the side wall of the first oil deflector flange (120) is provided with a mating protrusion (121) for mating with the gearbox input shaft (230).

5. A gearbox motor branch lubrication structure, comprising a gearbox housing assembly (210), a front bearing (220), a gearbox input shaft (230), a motor shaft (240) and an in-shaft oil guide pipe (100) according to any one of claims 1-4, wherein the pipe body (110) is arranged inside the gearbox input shaft (230), the oil retainer is matched with the inner side wall of the gearbox input shaft (230), and the gearbox input shaft (230) is provided with a transmission end (231) and a connecting end (232);

the front bearing (220) is arranged between the transmission end (231) and the gearbox housing (211), and the oil inlet end (111) is in clearance fit with the gearbox housing assembly (210); one end of the motor shaft (240) extends into the connecting end (232) and is matched with the connecting end (232) to form the spline structure (250), and the oil outlet end (112) extends into the motor shaft (240) and is in clearance fit with the motor shaft (240); the tube body (110) is used for guiding lubricating oil output by the gearbox housing assembly (210) into the motor shaft (240).

6. The gearbox motor subcircuit lubrication according to claim 5, wherein the gearbox housing component (210) together with the oil inlet end (111), the oil slinger stage and the drive end (231) form a first lubrication flow channel which communicates the nozzle of the oil inlet end (111) with the front bearing (220).

7. The gearbox motor branch lubrication structure according to claim 6, wherein the gearbox housing assembly (210) comprises a housing (211) and an input oil pipe (212), a matching cylinder (2111) is arranged on the housing (211), one end of the matching cylinder (2111) extends into the transmission end (231) and is sleeved on the outer side wall of the oil inlet end (111), and one end of the input oil pipe (212) extends into the other end of the matching cylinder (2111) and forms a first oil overflow gap (260) with the end wall of the oil inlet end (111);

the first oil spilling gap (260) is communicated with a gap between the matching cylinder (2111) and the outer side wall of the oil inlet end (111), a gap between the matching cylinder (2111) and the oil retainer wall, and a gap between the transmission end (231) and the shell (211) in sequence to form the first lubrication flow passage.

8. The gearbox motor branch lubrication structure according to claim 7, wherein a first oil overflow groove (1111) is concavely formed in an end wall of the oil inlet end (111), and the first oil overflow groove (1111) extends from an inner side wall of the pipe body (110) to an outer side wall of the pipe body (110); and/or the number of the groups of groups,

the oil inlet device is characterized in that a first oil guide groove (1112) is concavely formed in the outer side wall of the oil inlet end (111), one end of the first oil guide groove (1112) is formed in the end wall of the oil inlet end (111), and the other end of the first oil guide groove extends to a gap between the matching cylinder (2111) and the oil retainer wall.

9. The gearbox motor branch lubrication structure according to claim 5, wherein an end of the motor shaft (240) extending into the connection end (232) forms a second lubrication flow passage together with the oil outlet end (112) and the oil retainer wall, and a nozzle of the oil outlet end (112) is communicated with the spline structure (250) through the second lubrication flow passage.

10. The gearbox motor branch lubrication structure according to claim 9, wherein a second oil spilling gap (270) is formed between an end wall of the oil outlet end (112) and the motor shaft (240), and the second oil spilling gap (270) is sequentially communicated with a gap between an outer side wall of the oil outlet end (112) and an inner side wall of the motor shaft (240), and a gap between an end wall of the motor shaft (240) and the oil retainer wall, so as to form the second lubrication flow channel.

11. The gearbox motor branch lubrication structure according to claim 10, wherein a second oil overflow groove (1121) is concavely formed in an end wall of the oil outlet end (112), and the second oil overflow groove (1121) extends from an inner side wall of the pipe body (110) to an outer side wall of the pipe body (110); and/or the number of the groups of groups,

the oil inlet end (111) is provided with a second oil guide groove (1122) in a concave manner on the outer side wall, one end of the second oil guide groove (1122) is arranged on the end wall of the oil outlet end (112), and the other end of the second oil guide groove extends to a gap between the end wall of the motor shaft (240) and the oil retainer wall.

12. A vehicle, characterized by comprising a gearbox motor branch lubrication structure (200) according to any of claims 5-11.