Oil conduit, adapter shaft, transmission device, electric drive assembly and vehicle

Abstract

The utility model belongs to the technical field of vehicles, and discloses an oil guide pipe, an adapter shaft, a transmission device, an electric drive assembly and a vehicle, lubricating oil sequentially passes through a second oil inlet hole and a first oil inlet hole to enter a first lubricating channel, and the lubricating oil in an oil guide channel flows out to a lubricating cavity between a motor shaft and a shaft body through a first oil outlet hole and a second oil outlet hole. The motor shaft is lubricated; meanwhile, the coupling shaft mainly plays a role in transmitting the rotating speed and the torque, and the oil guide pipe and the hollow shaft body are adopted, so that the weight of the coupling shaft is reduced, the transmission efficiency is improved, few materials are used, and the machining cost of the coupling shaft is reduced.

Description

Technical Field

[0001] This utility model relates to the field of vehicle technology, and in particular to an oil guide pipe, an adapter shaft, a transmission device, an electric drive assembly, and a vehicle. Background Technology

[0002] A coaxial planetary gear reducer is a high-efficiency speed reduction device that typically uses a planetary gear mechanism for reduction. The input and output shafts of this reducer are coaxial, improving transmission efficiency while reducing space requirements. Because the input and output shafts are coaxial, an adapter shaft is usually required to connect the output shaft and the vehicle's half-shaft to transmit the reducer's output power to the half-shaft.

[0003] Specifically, the adapter shaft is installed through the motor shaft that connects to the input shaft. Lubricating oil is introduced into the adapter shaft, then guided by the adapter shaft to the motor shaft, and then sprayed out by the motor shaft to lubricate the motor rotor, while simultaneously enabling power transmission via the adapter shaft.

[0004] However, existing adapter shafts often use a solid shaft design with internal oil passages, which results in a heavy adapter shaft, affecting transmission efficiency, and also leads to low material utilization and high processing costs. Utility Model Content

[0005] The purpose of this utility model is to provide an oil guide pipe, a transition shaft, a transmission device, an electric drive assembly, and a vehicle, which can supply oil to the motor shaft while reducing the weight of the transition shaft, improving transmission efficiency, and reducing the processing cost of the transition shaft.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] An oil guide tube includes a guide tube body, wherein a first lubrication channel is provided within the guide tube body, and a first oil inlet and a first oil outlet are provided on the guide tube body. The first oil inlet and the first oil outlet are respectively connected to the first lubrication channel, and the outer wall of the guide tube body has a limiting fit structure for cooperating with the shaft of the adapter shaft.

[0008] As one possible implementation of the above-mentioned oil guide tube, the outer peripheral wall of the guide tube body is provided with at least one guide groove;

[0009] One end of the first oil inlet hole extends through the bottom wall of the guide groove, and the other end extends through the inner wall of the first lubrication channel; and / or, one end of the first oil outlet hole extends through the bottom wall of the guide groove, and the other end extends through the inner wall of the first lubrication channel.

[0010] As one possible implementation of the above-mentioned oil guide pipe, the guide groove is provided in two parts, one of which is an oil inlet guide groove and the other is an oil outlet guide groove; one end of the first oil inlet hole extends through the bottom wall of the oil inlet guide groove and the other end extends through the inner wall of the first lubrication channel; one end of the first oil outlet hole extends through the bottom wall of the oil outlet guide groove and the other end extends through the inner wall of the first lubrication channel.

[0011] As one possible implementation of the above-mentioned oil guide tube, the guide groove is provided, and the outer peripheral wall of the guide tube body is provided with two annular bosses arranged at intervals along the axial direction of the guide tube body, and the guide groove is formed between the two annular bosses.

[0012] Alternatively, the guide groove is provided in two places, and the outer peripheral wall of the conduit body is provided with two oil inlet bosses and two oil outlet bosses arranged sequentially and spaced apart along the axial direction of the conduit body. An oil inlet guide groove is formed between the two oil inlet bosses, and an oil outlet guide groove is formed between the two oil outlet bosses.

[0013] As one possible implementation of the above-mentioned oil guide tube, the end face of one axial end of the guide tube body is the first end face, and the end face of the other axial end is the second end face.

[0014] The limiting fit structure includes a first limiting fit part, which is the first end face; or, the outer peripheral wall of the catheter body is provided with a first protrusion, which has a first side face facing the same direction as the first end face, and the first limiting fit part is the first side face.

[0015] And / or, the limiting fit structure includes a second limiting fit portion, the second limiting fit portion being the second end face; or, the outer peripheral wall of the catheter body is provided with a second protrusion, the second protrusion having a second side surface facing the same direction as the second end face, the second limiting fit portion being the second side surface.

[0016] As one possible implementation of the aforementioned oil guide tube, at least one end of the guide tube body is closed.

[0017] As one possible implementation of the aforementioned oil guide tube, the tube body has a structure that is closed at both ends.

[0018] As one possible implementation of the aforementioned oil guide pipe, the oil guide pipe is an integrally formed structural component.

[0019] To achieve the above objectives, the present invention also provides an adapter shaft, including the oil guide pipe provided in any of the above-described embodiments, the adapter shaft further comprising:

[0020] The shaft is a hollow shaft, and the shaft is provided with a second oil inlet hole and a second oil outlet hole arranged at intervals along its axial direction; wherein the second oil outlet hole is used to communicate with the inner cavity of the motor shaft;

[0021] The oil guide pipe is located in the inner cavity of the shaft. The second oil inlet hole is connected to the first lubrication channel through the first oil inlet hole, and the first lubrication channel is connected to the second oil outlet hole through the first oil outlet hole.

[0022] As one possible implementation of the aforementioned adapter shaft, a first seal and a second seal are provided between the shaft body and the oil guide pipe, arranged at intervals along the axial direction of the shaft body, and the first oil inlet, the second oil inlet, the first oil outlet, and the second oil outlet are all located between the first seal and the second seal.

[0023] As one possible implementation of the above-mentioned adapter shaft, a third seal is provided between the shaft body and the oil guide pipe, which is arranged at intervals along the axial direction of the shaft body. Along the axial direction of the shaft body, the third seal is located between the first seal and the second seal.

[0024] The first oil inlet and the second oil inlet are both located between the first seal and the third seal; the second oil outlet and the first oil outlet are both located between the second seal and the third seal.

[0025] As one possible implementation of the above-mentioned adapter shaft, a guide cavity is formed between the inner peripheral wall of the shaft body and the outer peripheral wall of the oil guide pipe, and the first oil inlet hole, the second oil inlet hole, the second oil outlet hole and the first oil outlet hole are all connected to the guide cavity;

[0026] Alternatively, two guide cavities are formed between the inner peripheral wall of the shaft and the outer peripheral wall of the oil guide pipe, one of which connects the second oil inlet hole to the first oil inlet hole; the other guide cavity connects the first oil outlet hole to the second oil outlet hole.

[0027] As one possible implementation of the aforementioned adapter shaft, the outer peripheral wall of the catheter body is provided with a guide groove, and the inner wall of the shaft body and the inner wall of the guide groove together form the guide cavity.

[0028] As one possible implementation of the aforementioned adapter shaft, one end of the shaft is provided with a half-shaft connecting part, and the end of the oil guide pipe near the half-shaft connecting part is interference-fitted with the shaft.

[0029] As one possible implementation of the aforementioned adapter shaft, the shaft body is provided with:

[0030] A first limiting structure abuts against a first limiting fitting part of the oil guide pipe along a first direction, the first direction being the direction from the first oil inlet to the first oil outlet.

[0031] And / or, a second limiting structure, the second limiting structure abutting against the second limiting fitting part of the oil guide pipe along a second direction, the second direction being the direction from the first oil outlet to the first oil inlet.

[0032] As one possible implementation of the above-mentioned adapter shaft, the first limiting structure is an elastic retaining ring installed in the shaft body;

[0033] And / or, the inner hole of the shaft is a stepped hole, and the stepped surface of the stepped hole forms the second limiting structure.

[0034] To achieve the above objectives, the present invention also provides a transmission device, including an oil guide pipe as provided in any of the above-described embodiments, or an adapter shaft as provided in any of the above-described embodiments.

[0035] To achieve the above objectives, the present invention also provides an electric drive assembly, an oil guide pipe as provided in any of the above-described embodiments, or an adapter shaft as provided in any of the above-described embodiments, or the above-described transmission device.

[0036] As one possible implementation of the above-mentioned electric drive assembly, the electric drive assembly further includes:

[0037] A motor shaft, the shaft body is disposed through the motor shaft, a lubrication cavity is formed between the inner peripheral wall of the motor shaft and the outer peripheral wall of the shaft body, a second oil outlet hole on the shaft body is connected to the lubrication cavity, and a lubrication through hole connected to the lubrication cavity is provided on the motor shaft.

[0038] To achieve the above objectives, the present invention also provides a vehicle, an oil guide pipe as provided in any of the above-described embodiments, or an adapter shaft as provided in any of the above-described embodiments, or the above-described transmission device, or an electric drive assembly as provided in any of the above-described embodiments.

[0039] The beneficial effects of this utility model are:

[0040] The oil guide pipe, adapter shaft, transmission device, and electric drive assembly provided by this utility model allow lubricating oil to enter the lubrication channel sequentially through the second oil inlet and the first oil inlet, and the lubricating oil in the lubrication channel to flow out sequentially through the first oil outlet and the second oil outlet, thus realizing the circulation of lubricating oil. At the same time, the adapter shaft mainly plays the role of transmitting speed and torque. The use of an oil guide pipe and a hollow shaft body helps to reduce the weight of the adapter shaft, improve transmission efficiency, use less material, and reduce the processing cost of the adapter shaft.

[0041] The vehicle provided by this utility model includes the aforementioned adapter shaft, transmission device, or electric drive assembly, which improves power transmission efficiency and reduces vehicle cost. Attached Figure Description

[0042] Figure 1 This is a structural schematic diagram of the oil guide pipe provided in this embodiment of the utility model, and a cross-sectional view of the adapter shaft;

[0043] Figure 2 This is a schematic diagram of the structure of the shaft provided in an embodiment of the present utility model;

[0044] Figure 3 This is a cross-sectional view of the adapter shaft provided in this embodiment of the utility model;

[0045] Figure 4 This is a cross-sectional view of the adapter shaft provided in this embodiment of the present invention when it is assembled with the motor shaft;

[0046] Figure 5 yes Figure 4 A magnified view of a portion of point A in the middle;

[0047] Figure 6 yes Figure 4 A magnified view of a portion of point B in the middle.

[0048] In the picture:

[0049] 1. Shaft body; 11. Second oil inlet hole; 12. Second oil outlet hole; 13. Second limiting structure; 14. Internal spline; 15. External spline;

[0050] 2. Oil guide pipe; 20. Guide pipe body; 21. First lubrication channel; 22. First oil inlet hole; 23. First oil outlet hole; 24. Oil inlet boss; 25. Oil outlet boss; 26. First end face; 27. Second end face; 28. Oil inlet guide groove; 29. ​​Oil outlet guide groove;

[0051] 31. First seal; 32. Second seal; 33. Third seal;

[0052] 5. First limiting structure;

[0053] 6. Motor shaft; 61. Lubrication through hole;

[0054] 100. Oil inlet guide cavity; 200. Oil outlet guide cavity; 300. Lubrication cavity. Detailed Implementation

[0055] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0056] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0057] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0058] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0059] The present invention provides an oil guide pipe, an adapter shaft including the oil guide pipe, a transmission device including the oil guide pipe or the adapter shaft, an electric drive assembly including the oil guide pipe, the adapter shaft or the transmission device, and a vehicle including the oil guide pipe, the adapter shaft or the transmission device or the electric drive assembly, so as to achieve lubrication of the motor shaft, reduce the weight of the adapter shaft, improve transmission efficiency, and reduce the processing cost of the adapter shaft.

[0060] like Figure 1As shown, the oil guide tube 2 includes a guide tube body 20, a first lubrication channel 21 is provided inside the guide tube body 20, a first oil inlet hole 22 and a first oil outlet hole 23 are provided on the guide tube body 20, the first oil inlet hole 22 and the first oil outlet hole 23 are respectively connected to the first lubrication channel 21, and the guide tube body 20 has a limiting fit structure for cooperating with the shaft body 1 of the adapter shaft.

[0061] like Figures 1 to 4 As shown, the adapter shaft also includes a shaft body 1, which is a hollow shaft. The shaft body 1 is provided with a second oil inlet hole 11 and a second oil outlet hole 12 arranged at intervals along its axial direction. The oil guide pipe 2 is provided in the inner cavity of the shaft body 1. The second oil inlet hole 11 is connected to the first lubrication channel 21 through the first oil inlet hole 22. The first lubrication channel 21 is connected to the second oil outlet hole 12 through the first oil outlet hole 23.

[0062] When the aforementioned adapter shaft is applied to a transmission device, the transmission device further includes a motor shaft 6. A shaft body 1 extends through the motor shaft 6, and a lubrication cavity 300 is formed between the inner peripheral wall of the motor shaft 6 and the outer peripheral wall of the shaft body 1. A second oil outlet 12 communicates with the lubrication cavity 300, and the motor shaft 6 is provided with a lubrication through hole 61 communicating with the lubrication cavity 300. Exemplarily, the shaft body 1 is rotatable relative to the motor shaft 6. Alternatively, the shaft body 1 can be fixed to the motor shaft 6.

[0063] Lubricating oil enters the first lubrication channel 21 sequentially through the second oil outlet 12 and the first oil outlet 23. The lubricating oil in the first lubrication channel 21 flows out through the first oil outlet 23 and the second oil outlet 12 into the lubrication cavity 300 between the motor shaft 6 and the shaft body 1 to lubricate the motor shaft 6. During the rotation of the motor shaft 6, the lubricating oil in the lubrication cavity 300 will be sprayed out through the lubrication through hole 61 under the action of centrifugal force to cool the rotor of the motor. At the same time, the adapter shaft mainly plays the role of transmitting speed and torque. The use of oil guide pipe 2 and hollow shaft body 1 helps to reduce the weight of the adapter shaft, improve transmission efficiency, use less material, and reduce the processing cost of the adapter shaft.

[0064] When the aforementioned oil guide pipe 2, adapter shaft, transmission device, or electric drive assembly is applied to a vehicle, the vehicle also includes a half shaft. One end of the adapter shaft is connected to the output part of the transmission device, and the other end is connected to the half shaft, so that the output power of the transmission device can be transmitted to the half shaft of the vehicle through the adapter shaft, that is, the half shaft of the vehicle can be driven to rotate by the electric drive device.

[0065] For power transmission between different types of transmission devices and vehicle half-shafts, an adapter shaft can be designed according to requirements, and the oil passage of the adapter shaft can be designed.

[0066] In some embodiments, such as Figure 1As shown, at least two first oil inlet holes 22 are provided, and the at least two first oil inlet holes 22 are arranged at intervals along the circumference of the guide tube body 20, so as to realize that oil can be simultaneously introduced into the first lubrication channel 21 through the at least two first oil inlet holes 22 to meet the oil supply requirements. It should be noted that a single first oil inlet hole 22 may also be provided.

[0067] In some embodiments, such as Figure 2 As shown, at least two second oil inlet holes 11 are provided, and the at least two second oil inlet holes 11 are arranged at intervals along the circumference of the shaft body 1. This allows external lubricating oil to be delivered into at least two first oil inlet holes 22 through the at least two second oil inlet holes 11, thereby increasing the oil intake. It should be noted that a single second oil inlet hole 11 may also be provided.

[0068] For example, such as Figure 4 As shown, the first oil inlet hole 22 and the second oil inlet hole 11 are coaxially arranged in a one-to-one correspondence. As an alternative, the first oil inlet hole 22 and the second oil inlet hole 11 can also be arranged in a staggered manner along the circumference of the guide tube body 20, or the first oil inlet hole 22 and the second oil inlet hole 11 can be arranged in a staggered manner along the axial direction of the guide tube body 20.

[0069] In some embodiments, such as Figure 1 As shown, at least two first oil outlet holes 23 are provided, and the at least two first oil outlet holes 23 are arranged at intervals along the circumference of the conduit body 20, so that the lubricating oil in the first lubrication channel 21 can flow out through the at least two first oil outlet holes 23 to meet the oil outlet requirements of the first lubrication channel 21. It should be noted that a single first oil outlet hole 23 may also be provided.

[0070] In some embodiments, such as Figure 2 As shown, at least two second oil outlet holes 12 are provided, and the at least two second oil outlet holes 12 are arranged at intervals along the circumference of the conduit body 20, so that the lubricating oil in the first lubrication channel 21 can flow out through at least two first oil outlet holes 23 and at least two second oil outlet holes 12, so as to discharge the lubricating oil in the first lubrication channel 21 in a timely manner. It should be noted that one second oil outlet hole 12 may also be provided.

[0071] For example, such as Figure 3 and Figure 4 As shown, the first oil outlet 23 and the second oil outlet 12 are arranged offset along the axial direction of the conduit body 20. As an alternative, the first oil outlet 23 and the second oil outlet 12 can also be arranged offset circumferentially along the conduit body 20, or the first oil outlet 23 and the second oil outlet 12 can be coaxially arranged in a one-to-one correspondence.

[0072] In some embodiments, such as Figure 1 , Figures 4 to 6As shown, in order to facilitate the lubricating oil in the second oil inlet 11 to enter the first oil inlet 22, and to facilitate the lubricating oil in the first oil outlet 23 to enter the second oil outlet 12, two guide cavities are formed between the inner peripheral wall of the shaft body 1 and the outer peripheral wall of the oil guide tube 2. The second oil inlet 11 is connected to the first oil inlet 22 through one guide cavity, and the first oil outlet 23 is connected to the second oil outlet 12 through the other guide cavity.

[0073] For ease of description, the guide cavity connecting the second oil inlet 11 and the first oil inlet 22 is referred to as the oil inlet guide cavity 100, and the guide cavity connecting the first oil outlet 23 and the second oil outlet 12 is referred to as the oil outlet guide cavity 200.

[0074] For example, the outer peripheral wall of the conduit body 20 is provided with two guide grooves spaced apart along the axial direction of the conduit body 20, one of which is an oil inlet guide groove 28 and the other is an oil outlet guide groove 29. One end of the first oil inlet hole 22 extends to the bottom wall of the oil inlet guide groove 28, and the other end extends to the inner wall of the first lubrication channel 21. The inner wall of the oil inlet guide groove 28 and the inner wall of the shaft 1 enclose the aforementioned oil inlet guide cavity 100. In the case of providing multiple second oil inlets 11 and / or multiple first oil inlets 22, the lubricating oil in at least two of the second oil inlets 11 enters the oil inlet guide cavity 100, and the lubricating oil in the oil inlet guide cavity 100 enters the first lubrication channel 21 through at least two of the first oil inlets 22. By providing guide grooves on the outer peripheral wall of the conduit body 20, the slotted area of ​​the shaft 1 can be reduced, and the structural strength of the shaft 1 can be improved.

[0075] It should be noted that the following schemes also require the arrangement of an oil inlet guide cavity 100: one scheme with a first oil inlet hole 22 and at least two second oil inlets 11, one scheme with a second oil inlet hole 11 and at least two first oil inlets 22, and one scheme with a first oil inlet hole 22 and a second oil inlet hole 11 arranged with the first oil inlet hole 22 and the second oil inlet hole 11 being staggered along the circumference of the guide body 20.

[0076] By setting up an oil inlet guide cavity 100 and connecting the second oil inlet hole 11 with the first oil inlet hole 22 through the oil inlet guide cavity 100, not only can the positional requirements between the second oil inlet hole 11 and the first oil inlet hole 22 be reduced, but the assembly requirements can also be reduced.

[0077] One end of the first oil outlet hole 23 extends to the bottom wall of the oil outlet guide groove 29, and the other end extends to the inner wall of the first lubrication channel 21. The inner wall of the oil outlet guide groove 29 and the inner wall of the shaft 1 together form the aforementioned oil outlet guide cavity 200. In the case of a scheme with multiple second oil outlet holes 12 and / or multiple first oil outlet holes 23, the lubricating oil in the first lubrication channel 21 enters the oil outlet guide cavity 200 through at least two first oil outlet holes 23, and the lubricating oil in the oil outlet guide cavity 200 flows out through at least two second oil outlet holes 12.

[0078] It should be noted that the following schemes also require the arrangement of an oil outlet guide cavity 200: one scheme with a first oil outlet 23 and at least two second oil outlets 12, one scheme with a second oil inlet 11 and at least two second oil outlets 12, and one scheme with a first oil outlet 23 and a second oil outlet 12 arranged in a staggered manner along the circumference of the guide tube body 20.

[0079] By setting up an oil outlet guide cavity 200 and connecting the first oil outlet hole 23 with the second oil outlet hole 12 through the annular oil outlet guide cavity 200, not only can the positional requirements between the second oil outlet hole 12 and the first oil outlet hole 23 be reduced, but the assembly requirements can also be reduced.

[0080] As an alternative, the oil inlet guide groove 28 can also be provided on the inner peripheral wall of the shaft body 1, and the oil inlet guide cavity can be formed by the inner wall of the oil inlet guide groove 28 and the outer peripheral wall of the guide body 20; or the oil inlet guide groove 28 can be provided on the inner peripheral wall of the shaft body 1 and the oil inlet guide groove 28 can be provided on the outer peripheral wall of the guide body 20, and the inner walls of the two oil inlet guide grooves 28 can be formed by the enclosing of the oil inlet guide cavity.

[0081] As an alternative, the oil outlet guide groove 29 can also be provided on the inner peripheral wall of the shaft body 1, and the oil outlet guide cavity can be formed by the inner wall of the oil outlet guide groove 29 and the outer peripheral wall of the conduit body 20; or the oil outlet guide groove 29 can be provided on the inner peripheral wall of the shaft body 1 and the outer peripheral wall of the conduit body 20, and the oil outlet guide cavity can be formed by the inner walls of the two oil outlet guide grooves 29.

[0082] As an alternative, a single guide cavity can be provided. A guide groove can be formed on the inner circumferential wall of the shaft 1, with the inner wall of the guide groove and the outer circumferential wall of the guide body 20 enclosing the guide cavity. Alternatively, a guide groove can be formed on the outer circumferential wall of the guide body 20, with the inner wall of the guide groove and the inner circumferential wall of the shaft 1 enclosing the guide cavity. One end of the first oil inlet 22 and the first oil outlet 23 extend to the bottom wall of the guide groove, and the other end extends to the inner circumferential wall of the guide body 20. The first oil inlet 22, the second oil inlet 11, the first oil outlet 23, and the second oil outlet 12 are all connected to the guide cavity. This allows a portion of the lubricating oil entering the guide cavity through the second oil inlet 11 to enter the first lubrication channel 21 through the first oil inlet 22. The lubricating oil in the first lubrication channel 21 flows into the guide cavity through the first oil outlet 23, merges with another portion of the lubricating oil in the guide cavity, and then flows out through at least two second oil outlets 12.

[0083] Taking the example of simultaneously setting an oil inlet guide groove 28 and an oil outlet guide groove 29 on the outer peripheral wall of the conduit body 20, the outer peripheral wall of the conduit body 20 is provided with two oil inlet bosses 24 and two oil outlet bosses 25 arranged sequentially and spaced apart along the axial direction of the conduit body 20. An oil inlet guide groove 28 is formed between the two oil inlet bosses 24, and an oil outlet guide groove 29 is formed between the two oil outlet bosses 25.

[0084] It should be noted that, for the scheme of setting a guide groove on the outer peripheral wall of the catheter body 20, two annular bosses are arranged on the outer peripheral wall of the catheter body 20, and a guide groove is formed between the two annular bosses.

[0085] In some embodiments, such as Figures 4 to 6 As shown, a first seal 31 and a second seal 32 are provided between the shaft 1 and the oil guide pipe 2, arranged axially at intervals along the shaft 1. The first oil inlet 22, the first oil outlet 23, and the second oil outlet 12 are all located between the first seal 31 and the second seal 32. During the process of lubricating oil entering the first oil inlet 22 through the second oil inlet 11 and entering the second oil outlet 12 through the first oil outlet 23, the probability of lubricating oil leakage between the shaft 1 and the oil guide pipe 2 on the side away from the first seal 31 and the second seal 32 is reduced, as is the probability of lubricating oil leakage between the shaft 1 and the oil guide pipe 2 on the side away from the second seal 32 and the second seal 31, thereby ensuring that sufficient lubricating oil is delivered into the lubrication chamber 300.

[0086] It should be noted that the number of first seals 31 can be one, two, or more, and the number of second seals 32 can be one, two, or more.

[0087] In some embodiments, such as Figures 4 to 6As shown, a third seal 33 is provided between the shaft 1 and the oil guide pipe 2. Along the axial direction of the shaft 1, the third seal 33 is located between the first seal 31 and the second seal 32. The first oil inlet hole 22 and the second oil inlet hole 11 are both located between the first seal 31 and the third seal 33; the second oil outlet hole 12 and the first oil outlet hole 23 are both located between the second seal 32 and the third seal 33. This arrangement ensures that the second oil inlet hole 11 cannot communicate with the second oil outlet hole 12 through the gap between the outer peripheral wall of the shaft 1 and the inner peripheral wall of the oil guide pipe 2.

[0088] For example, there are two third seals 33. The first oil inlet 22 and the second oil inlet 11 are both located between the first seal 31 and the third seal 33 adjacent to the first seal 31. The second oil outlet 12 and the first oil outlet 23 are both located between the second seal 32 and the third seal 33 adjacent to the second seal 32. This arrangement can reduce lubricating oil leakage between the two third seals 33.

[0089] It should be noted that the aforementioned third seal 33 can be selected as one, three, or more.

[0090] It should be noted that the first seal 31, the second seal 32 and the third seal 33 mentioned above can all be commonly used O-rings.

[0091] As an alternative, the third seal 33 can be removed, and only the first seal 31 and the second seal 32 can be arranged, with the first oil inlet 22, the second oil inlet 11, the first oil outlet 23 and the second oil outlet 12 all located between the first seal 31 and the second seal 32.

[0092] In some embodiments, such as Figure 5 As shown, one end of the shaft 1 is provided with a half-shaft connecting part for connecting the half-shaft, and the end of the oil guide pipe 2 near the half-shaft connecting part is interference-fitted with the shaft 1. Exemplarily, the half-shaft connecting part is an internal spline 14, which is splined to the half-shaft. By interfering-fitting the end of the oil guide pipe 2 near the internal spline 14 with the shaft 1, not only can the oil guide pipe 2 be prevented from loosening due to vibration of the adapter shaft, thus improving the connection stability between the oil guide pipe 2 and the shaft 1, but the sealing performance between the end of the oil guide pipe 2 near the internal spline 14 and the shaft 1 can also be further improved, preventing lubricating oil from leaking between the internal spline 14 and the half-shaft.

[0093] For example, the first seal 31 and the inner spline 14 are located at the same axial end of the oil guide tube 2.

[0094] The end of the shaft 1 away from the half-shaft connection is provided with a reduction connection, which is connected to the output part of the reducer so as to transmit the power output of the reducer to the half-shaft of the vehicle through the adapter shaft.

[0095] For example, the reduction connection is an external spline 15, which is splined to the output of the reducer. Since the connection between the external spline 15 and the output of the reducer is located inside the reducer, even if the lubricating oil between the shaft 1 and the oil guide pipe 2 leaks to the end of the oil guide pipe 2 near the external spline 15, it will circulate through the internal oil circuit system. Therefore, the end of the oil guide pipe 2 away from the half-shaft connection only needs to be sealed by the first seal 31 to prevent a large amount of lubricating oil leakage.

[0096] In some embodiments, such as Figure 1 As shown, the oil guide pipe 2 is closed at at least one end. For example, the oil guide pipe 2 has a closed-end structure to prevent lubricating oil in the first lubrication channel 21 from leaking from the side where the half-shaft connection is located, thus preventing lubricating oil loss. Alternatively, one end of the oil guide pipe 2 near the half-shaft connection can be closed, and the other end can be open, allowing a portion of the lubricating oil in the first lubrication channel 21 to be delivered into the reducer of the electric drive assembly for lubrication inside the reducer.

[0097] In some embodiments, such as Figure 1 and Figure 5 As shown, the limiting fit structure includes a first limiting fit part. The shaft body 1 is provided with a first limiting structure 5. The first limiting structure 5 abuts against the first limiting fit part of the oil guide pipe 2 along a first direction. The first direction is from the first oil inlet hole 22 to the first oil outlet hole 23.

[0098] Specifically, the end face of the conduit body 20 at one axial end is the first end face 26, and the end face at the other axial end is the second end face 27. The first limiting mating part is the first end face 26, and the first limiting structure 5 abuts against the first end face 26 along the first direction to prevent the oil guide pipe 2 from moving towards the side closer to the first end face 26 when the electric drive assembly is working.

[0099] As an alternative, other first limiting mating parts can also be used. The outer peripheral wall of the catheter body 20 is provided with a first protrusion. The first protrusion has a first side facing the same direction as the first end face 26. The first limiting mating part is the first side.

[0100] In some embodiments, such as Figure 1 and Figure 6 As shown, the limiting fit structure includes a second limiting fit part. The shaft body 1 is provided with a second limiting structure 13. The second limiting structure 13 abuts against the second limiting fit part of the oil guide pipe 2 along a second direction, which is the direction from the first oil outlet hole 23 to the first oil inlet hole 22.

[0101] Specifically, the second limiting mating part is the second end face 27, and the second limiting structure 13 abuts against the second end face 27 along the second direction to prevent the oil guide pipe 2 from moving towards the side closer to the second end face 27 when the electric drive assembly is working.

[0102] As an alternative, other second limiting mating parts can also be used. The outer peripheral wall of the catheter body 20 is provided with a second protrusion. The first protrusion has a second side surface facing the same direction as the second end face 27. The second limiting mating part is the second side surface.

[0103] The oil guide pipe 2 is positioned axially between the first limiting structure 5 and the second limiting structure 13 along the shaft body 1 to prevent the oil guide pipe 2 from shaking within the shaft body 1 and to improve the stability of the oil guide pipe 2.

[0104] For example, the first limiting structure 5 is an elastic retaining ring installed in the shaft body 1, the inner hole of the shaft body 1 is a stepped hole, and the stepped surface of the stepped hole forms the aforementioned second limiting structure 13. Specifically, the oil guide pipe 2 is inserted into the shaft body 1 through the large-diameter end of the stepped hole until the second end face 27 abuts against the second limiting structure 13, and then the elastic retaining ring is installed.

[0105] As an alternative, both the first limiting structure 5 and the second limiting structure 13 can be made of elastic retaining rings. Alternatively, the first limiting structure 5 can be made of a stepped surface, and the second limiting structure 13 can be made of elastic retaining rings. Accordingly, the oil guide pipe 2 can be installed into the shaft body 1 from the side where the second limiting structure 13 is located.

[0106] In some embodiments, such as Figure 1 As shown, the oil guide tube 2 is a one-piece molded structural component, which simplifies the processing of the oil guide tube 2 and reduces processing costs. For example, the oil guide tube 2 is an injection-molded plastic tube, which is lightweight and low in cost. As an alternative, the oil guide tube 2 can also be designed as a split structure. Taking an oil guide tube 2 closed at both ends as an example, for instance, the oil guide tube 2 includes a tube body closed at one end and a plug that seals the opening at the other end of the tube body; or the oil guide tube 2 includes a tube body open at both ends, with each end of the tube body sealed by a plug.

[0107] In some embodiments, such as Figure 4 As shown, an annular lubrication groove is formed on the inner circumferential wall of the motor shaft 6. The inner wall of the lubrication groove and the outer shaft wall of the shaft body 1 together form the aforementioned lubrication cavity 300. Since the torque borne by the shaft body 1 is greater than that borne by the motor shaft 6, placing the lubrication groove on the motor shaft 6 can effectively ensure the structural strength of the shaft body 1.

[0108] It should be noted that a first bearing is provided at each of the two ends of the motor shaft 6, and a second bearing is provided at each end of the shaft body 1. The second bearings are located outside the motor shaft 6. The rotation requirements of the motor shaft 6 are met by setting the first bearings, and the rotation requirements of the shaft body 1 are met by setting the second bearings. The inner circumferential wall of the motor shaft 6 and the outer circumferential wall of the shaft body 1 are spaced apart to prevent interference when the motor shaft 6 and the shaft body 1 rotate relative to each other.

[0109] In some embodiments, the shaft 1 can be manufactured from a tubular blank, and an internal spline 14 can be formed at one end of the shaft 1 by forging. Various bosses on the outer wall of the shaft 1 can be machined. The parts have a high material utilization rate, are lightweight, and have a low cost.

[0110] For the adapter shaft provided in the embodiment of the present invention, the first lubrication channel 21 may not be provided in the oil guide pipe 2. Instead, a second lubrication channel is formed between the outer peripheral wall of the oil guide pipe 2 and the inner peripheral wall of the shaft body 1, and the second oil inlet hole 11 and the second oil outlet hole 12 on the shaft body are both connected to the second lubrication channel.

[0111] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A guide tube, characterized in that The conduit includes a conduit body (20), which has a first lubrication channel (21) inside. The conduit body (20) has a first oil inlet (22) and a first oil outlet (23) on it. The first oil inlet (22) and the first oil outlet (23) are respectively connected to the first lubrication channel (21). The outer wall of the conduit body (20) has a limiting fit structure for cooperating with the shaft (1) of the adapter shaft.

2. The oil guide pipe according to claim 1, characterized by The outer peripheral wall of the catheter body (20) is provided with at least one guide groove; One end of the first oil inlet hole (22) extends to the bottom wall of the guide groove, and the other end extends to the inner wall of the first lubrication channel (21); and / or, one end of the first oil outlet hole (23) extends to the bottom wall of the guide groove, and the other end extends to the inner wall of the first lubrication channel (21).

3. The oil guide pipe according to claim 2, characterized by Two guide grooves are provided, one of which is an oil inlet guide groove (28) and the other is an oil outlet guide groove (29); one end of the first oil inlet hole (22) extends through the bottom wall of the oil inlet guide groove (28) and the other end extends through the inner wall of the first lubrication channel (21); one end of the first oil outlet hole (23) extends through the bottom wall of the oil outlet guide groove (29) and the other end extends through the inner wall of the first lubrication channel (21).

4. The oil guide pipe according to claim 2, characterized by The guide groove is provided, and the outer peripheral wall of the catheter body (20) is provided with two annular bosses arranged at intervals along the axial direction of the catheter body (20), and the guide groove is formed between the two annular bosses; Alternatively, the guide groove is provided in two places, and the outer peripheral wall of the guide body (20) is provided with two oil inlet bosses (24) and two oil outlet bosses (25) arranged sequentially and spaced apart along the axial direction of the guide body (20). An oil inlet guide groove (28) is formed between the two oil inlet bosses (24), and an oil outlet guide groove (29) is formed between the two oil outlet bosses (25).

5. The oil conduit according to any one of claims 1 to 4, characterized in that The end face of the catheter body (20) at one end along the axial direction is the first end face (26), and the end face at the other end along the axial direction is the second end face (27). The limiting fit structure includes a first limiting fit part, which is the first end face (26), or the outer peripheral wall of the catheter body (20) is provided with a first protrusion, which has a first side face facing the same direction as the first end face (26), and the first limiting fit part is the first side face. And / or, the limiting fit structure includes a second limiting fit part, the second limiting fit part being the second end face (27), or, the outer peripheral wall of the catheter body (20) is provided with a first protrusion, the outer peripheral wall of the catheter body (20) is provided with a second protrusion, the first protrusion having a second side facing the same direction as the second end face (27), and the second limiting fit part being the second side.

6. The oil conduit according to any one of claims 1 to 5, characterized in that The catheter body (20) is closed at at least one end.

7. The oil guide pipe according to claim 6, characterized by The catheter body (20) has a closed structure at both ends.

8. The oil conduit according to any one of claims 1 to 7, characterized in that The oil guide pipe (2) is an integrally formed structural component.

9. A transfer shaft, characterized by Including the oil guide pipe (2) as described in any one of claims 1 to 8, the adapter shaft further includes: Shaft (1), the shaft (1) is a hollow shaft, the shaft (1) is provided with a second oil inlet hole (11) and a second oil outlet hole (12) arranged at intervals along its axial direction; wherein, the second oil outlet hole (12) is used to communicate with the inner cavity of the motor shaft (6); The oil guide pipe (2) is located in the inner cavity of the shaft (1). The second oil inlet (11) is connected to the first lubrication channel (21) through the first oil inlet (22). The first lubrication channel (21) is connected to the second oil outlet (12) through the first oil outlet (23).

10. The transfer shaft of claim 9, wherein, A first seal (31) and a second seal (32) are provided between the shaft (1) and the oil guide pipe (2) at intervals along the axial direction of the shaft (1). The first oil inlet (22), the second oil inlet (11), the first oil outlet (23) and the second oil outlet (12) are all located between the first seal (31) and the second seal (32).

11. The transfer shaft of claim 10, wherein, A third seal (33) is provided between the shaft (1) and the oil guide pipe (2) at an axial interval along the shaft (1). Along the axial direction of the shaft (1), the third seal (33) is located between the first seal (31) and the second seal (32). The first oil inlet (22) and the second oil inlet (11) are both located between the first seal (31) and the third seal (33); the second oil outlet (12) and the first oil outlet (23) are both located between the second seal (32) and the third seal (33).

12. The adapter shaft of any one of claims 9 to 11, wherein, A guide cavity is formed between the inner peripheral wall of the shaft (1) and the outer peripheral wall of the oil guide pipe (2), and the first oil inlet (22), the second oil inlet (11), the second oil outlet (12) and the first oil outlet (23) are all connected to the guide cavity; Alternatively, two guide cavities are formed between the inner peripheral wall of the shaft (1) and the outer peripheral wall of the oil guide pipe (2), one of which connects the second oil inlet hole (11) with the first oil inlet hole (22); the other guide cavity connects the first oil outlet hole (23) with the second oil outlet hole (12).

13. The transfer shaft of claim 12, wherein, The outer peripheral wall of the catheter body (20) is provided with a guide groove, and the inner wall of the shaft (1) and the inner wall of the guide groove form the guide cavity.

14. The adapter shaft of any one of claims 9 to 13, wherein, One end of the shaft (1) is provided with a half-shaft connecting part, and the end of the oil guide pipe (2) near the half-shaft connecting part is press-fitted with the shaft (1).

15. The adapter shaft of any one of claims 9 to 14, wherein, The shaft (1) contains: The first limiting structure (5) abuts against the first limiting mating part of the oil guide pipe (2) along a first direction, the first direction being the direction from the first oil inlet (22) to the first oil outlet (23); And / or, a second limiting structure (13), the second limiting structure (13) abuts against the second limiting fitting part of the oil guide pipe (2) along a second direction, the second direction being the direction from the first oil outlet (23) to the first oil inlet (22).

16. The transfer shaft of claim 15, wherein, The first limiting structure (5) is an elastic retaining ring installed inside the shaft (1); And / or, the inner hole of the shaft (1) is a stepped hole, and the stepped surface of the stepped hole forms the second limiting structure (13).

17. Transmission, characterized in that It includes the oil guide tube (2) as described in any one of claims 1 to 8, or the adapter shaft as described in any one of claims 9 to 16.

18. An electric drive assembly characterized by, It includes the oil guide pipe (2) as described in any one of claims 1 to 8, or the adapter shaft as described in any one of claims 9 to 16, or the transmission device as described in claim 17.

19. The electric drive assembly of claim 18, wherein, The electric drive assembly also includes: The motor shaft (6) has a shaft body (1) through which the motor shaft (6) is disposed. A lubrication cavity (300) is formed between the inner peripheral wall of the motor shaft (6) and the outer peripheral wall of the shaft body (1). A second oil outlet hole (12) on the shaft body (1) communicates with the lubrication cavity (300). The motor shaft (6) is provided with a lubrication through hole (61) communicating with the lubrication cavity (300).

20. A vehicle, characterized by It includes the oil guide pipe (2) as described in any one of claims 1 to 8, or the adapter shaft as described in any one of claims 9 to 16, or the transmission device as described in claim 17, or the electric drive assembly as described in claim 18 or 19.

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