Electric drive assembly and vehicle

Abstract

The application discloses an electric drive assembly and a vehicle. The electric drive assembly comprises a reducer provided with a flow guide assembly for receiving lubricating oil in the reducer; an input shaft provided with a first end, a second end and a shaft hole communicating the first end and the second end, an outlet end of the flow guide assembly being located in the first end of the shaft hole; a motor shaft, an output end of the motor shaft extending into the shaft hole from the second end, and a spline being sleeved on an outer circumferential side of the output end, the outer circumferential side of the spline and a hole wall of the shaft hole having a matching gap; and an oil guide piece comprising an oil guide pipe, the oil guide pipe being arranged in the shaft hole, the oil guide pipe being provided with an oil guide hole, the diameter of the oil guide hole increasing in the axial direction towards the motor shaft, and the oil guide hole communicating with the matching gap. The lubricating oil flowing out of the reducer is guided and transmitted by the flow guide assembly into the oil guide pipe with a variable-diameter oil guide hole in the input shaft, the lubricating oil can be guided to the matching gap of the spline between the output end of the motor shaft and the input shaft, and active lubrication of the spline is realized.

Description

Technical Field

[0001] This application relates to the field of drive technology, and in particular to an electric drive assembly and vehicle. Background Technology

[0002] In existing electric drive assemblies, the high-speed motor shaft and reducer transmit torque via splines. As the speed increases, the splines are prone to resonance with the housing during high-speed rotation, which aggravates noise and vibration, resulting in a poor user experience. In addition, insufficient lubrication at the spline position can easily lead to rust or wear, affecting the service life and reliability of the splines. Utility Model Content

[0003] The main technical problem addressed by this application is to provide an electric drive assembly and vehicle that solves the problem of insufficient spline lubrication in the electric drive assembly.

[0004] To solve the above-mentioned technical problems, this application adopts a technical solution: an electric drive assembly, the electric drive assembly comprising: a reducer, provided with a flow-draining component for receiving lubricating oil in the reducer; an input shaft, provided with a first end and a second end arranged axially opposite to each other and a shaft hole connecting the first end and the second end, wherein the first end is rotatably connected to the reducer, and the outlet end of the flow-draining component is located in the first end of the shaft hole; a motor shaft, the output end of the motor shaft extending from the second end into the shaft hole, and the output... A spline is sleeved on the outer periphery of the end, and the spline is connected to the wall of the shaft hole. There is a fitting clearance between the outer periphery of the spline and the wall of the shaft hole. An oil guide includes an oil guide tube, which is disposed in the shaft hole and located on the side of the output end facing the first end. The oil guide tube has an axial oil guide hole, and the liquid outlet end extends into the oil guide hole. In the axial direction, the diameter of the oil guide hole increases towards the direction close to the motor shaft. The oil guide hole communicates with the fitting clearance so that the lubricating oil flowing out of the liquid outlet end flows into the fitting clearance through the oil guide hole.

[0005] The oil guide pipe is further provided with an oil inlet end and an oil outlet end arranged axially opposite to each other. The oil guide hole connects the oil inlet end and the oil outlet end. The oil outlet end extends from the oil inlet end into the oil guide hole. The oil guide component also includes: a plurality of oil guide ribs, which are circumferentially spaced on the inner wall of the oil guide hole. Each oil guide rib extends from the oil inlet end to the oil outlet end. An oil retardation groove is formed between two adjacent oil guide ribs and the hole wall of the oil guide hole to accommodate the lubricating oil flowing into the oil guide pipe from the oil inlet end.

[0006] Each of the oil guide ribs includes: a first oil guide portion extending along the axial direction of the oil guide hole, and the first oil guide portion extending from the oil inlet end to the oil outlet end; a second oil guide portion disposed near the oil inlet end, and one end of the second oil guide portion being connected to the first oil guide portion, and the other end extending along the radial direction of the oil guide hole, wherein at least a portion of the outer sidewall of the outlet end abuts against the second oil guide portion.

[0007] In the direction away from the first oil guide portion, the distance between the side surface of the second oil guide portion away from the oil guide hole wall and the oil guide hole wall gradually decreases.

[0008] The reducer includes: a reduction housing with a through hole and an oil collection hole communicating with the through hole; the first end of the input shaft is rotatably disposed in the through hole, and the shaft hole communicates with the through hole; the inlet end of the drainage assembly is located in the through hole to receive lubricating oil flowing out of the reduction housing and falling into the through hole through the oil collection hole, and to transfer the received lubricating oil to the oil guide pipe in the shaft hole via the outlet end.

[0009] The drainage assembly includes: an oil collecting member disposed within the through hole and having an inlet end, the oil collecting member being used to collect lubricating oil flowing into the through hole from the oil collecting hole; and a drainage member having one end connected to the oil collecting member and the other end extending into the oil guide pipe within the input shaft and having an outlet end, so as to introduce the collected lubricating oil into the oil guide hole, wherein the outer peripheral wall of the drainage member abuts against the second oil guide portion.

[0010] The oil collecting component includes: a first oil collecting part, one end of which is connected to one side wall of the through hole, and the other end extending radially toward the center of the through hole; a second oil collecting part, one end of which is connected to the other side wall of the through hole, and the other end extending radially toward the center of the through hole, and connected to the end of the first oil collecting part away from the wall of the through hole, wherein the first oil collecting part and the second oil collecting part are inclined in opposite directions; wherein the draining member is connected at the connection position of the first oil collecting part and the second oil collecting part, and the draining member is suspended in the through hole.

[0011] The inner wall of the shaft hole is provided with a protrusion that protrudes towards the motor shaft. The protrusion is arranged circumferentially around the inner wall of the shaft hole, and the protrusion is fitted into the recess on the outer surface of the motor shaft to block one side opening of the mating gap.

[0012] The electric drive assembly further includes a drive housing disposed on one side of the reduction housing, and the second end of the input shaft is rotatably connected to the drive housing.

[0013] To solve the above-mentioned technical problems, this application also adopts a technical solution: a vehicle including the electric drive assembly described in any of the above claims.

[0014] Beneficial effects: The lubricating oil flowing out of the reducer of this application is guided and transmitted through the diversion component into the oil guide pipe with a variable diameter oil guide hole in the input shaft. This guides the lubricating oil to the spline mating clearance between the motor shaft output end and the input shaft, thereby achieving active lubrication and effective cooling of the spline transmission position, reducing spline friction and wear, and improving product reliability. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein: Figure 1 This is a schematic diagram of the structure of an electric drive assembly provided in an embodiment of this application; Figure 2 for Figure 1 Enlarged schematic diagram of Part II; Figure 3 This is a schematic diagram of the structure of an input shaft provided in an embodiment of this application; Figure 4 This is a schematic diagram of the connection structure between the motor shaft and the spline provided in an embodiment of this application; Figure 5 This is a schematic diagram of the structure of an oil guide provided in an embodiment of this application; Figure 6 This is a schematic diagram of the structure of a speed reducer provided in one embodiment of this application; Figure 7 This is a structural block diagram of a vehicle provided in one embodiment of this application. Detailed Implementation

[0016] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0017] The terms "first," "second," and "third" in this application are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first," "second," or "third" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified. All directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationships and movements between components in a specific orientation (as shown in the figures). If the specific orientation changes, the directional indications also change accordingly. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or devices.

[0018] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0019] Please refer to the following: Figure 1 , Figure 2 , Figure 3 and Figure 4 ,in Figure 2 for Figure 1 The enlarged schematic diagram of part II shows that this application provides an electric drive assembly 100, which includes a reducer 10, an input shaft 20, a motor shaft 30, and an oil guide 40. The input shaft 20 can be the shaft structure in the reducer 10, and the motor shaft 30 is the shaft structure in the drive motor. The reducer 10 reduces the output speed of the drive motor and increases the output torque, making it an indispensable power transmission component in the electric drive assembly 100. The input shaft 20, as the input component of the reducer 10, has shaft holes 23 extending through both ends. The motor shaft 30, as the rotary output shaft, has its output end 31 inserted into the shaft hole 23 of the input shaft 20, and torque transmission is achieved through a spline 50 connection. The oil guide 40 is arranged inside the shaft hole 23 and is specifically used to guide lubricating oil to the mating clearance 51 of the spline 50.

[0020] Specifically, the reducer 10 is provided with a flow-guiding assembly 11, which is used to receive the lubricating oil in the reducer 10 so as to make full use of the lubricating oil and transmit it to the oil guide 40 in the input shaft 20 to lubricate the spline 50.

[0021] The input shaft 20 has a first end 21 and a second end 22 arranged axially opposite to each other, and a shaft hole 23 connecting the first end 21 and the second end 22. The first end 21 is rotatably connected to the reducer 10, and the liquid outlet end 111 of the drainage assembly 11 is located in the first end 21 of the shaft hole 23.

[0022] The input shaft 20 has a first end 21 (near the reducer 10) and a second end 22 (away from the reducer 10), which are axially opposite. A through-hole 23 is provided within the shaft, which not only accommodates the motor shaft 30 but also serves as a channel for the transmission of lubricating oil (i.e., the outlet end 111 of the drainage assembly 11 and the oil guide 40). The first end 21 is rotatably connected to the reducer 10, meaning that the input shaft 20 itself can be an input component of the reducer 10, rotating under the drive of an external motor. Lubricating oil is transmitted from the outlet end 111 of the drainage assembly 11 in the reducer 10 to the oil guide 40 within the shaft hole 23, where gravity or centrifugal force allows the lubricating oil to flow.

[0023] The output end 31 of the motor shaft 30 extends into the shaft hole 23 from the second end 22, and a spline 50 is sleeved on the outer periphery of the output end 31. The spline 50 is connected to the hole wall of the shaft hole 23 to realize torque transmission. There is a fitting clearance 51 between the outer periphery of the spline 50 and the hole wall of the shaft hole 23.

[0024] The oil guide component 40 includes an oil guide tube 41, which is disposed within the shaft hole 23 and located on the side of the output end 31 facing the first end 21 (i.e., upstream of the spline 50 region). The oil guide tube 41 has an axial oil guide hole 411, and the outlet end 111 extends into the oil guide hole 411. In the axial direction, the diameter of the oil guide hole 411 increases towards the motor shaft 30, forming a flared or expanded diameter structure. The oil guide hole 411 connects to the fitting clearance 51 so that the lubricating oil flowing out of the outlet end 111 flows into the fitting clearance 51 through the oil guide hole 411. That is, one end of the oil guide hole 411 connects to the outlet end 111 of the drainage component 11, and the other end connects to the fitting clearance 51 at the spline 50 position.

[0025] It is understandable that this application does not require an additional electric pump. The lubrication system of the reducer 10 is used to complete the lubrication of the key points inside the input shaft 20 and the motor shaft 30 (i.e., the mating clearance 51 of the spline 50), which can reduce manufacturing costs and the number of failure points.

[0026] After the lubricating oil flows from the reducer 10 into the flow guide assembly 11, it is directly transmitted through the outlet end 111 of the flow guide assembly 11 to the oil guide tube 41 inside the input shaft 20. When the input shaft 20 rotates at high speed, the centrifugal force generated, combined with the design of the enlarged diameter oil guide hole 411, reduces the flow resistance of the lubricating oil, making it easier for the lubricating oil to flow into the mating clearance 51 of the spline 50. The lubricating oil forms an oil film in the mating clearance 51 to achieve lubrication, thereby reducing the wear of the spline 50, extending the service life of the spline 50, and reducing the abnormal noise and vibration caused by dry friction due to insufficient lubrication at the spline 50 position, thus improving noise, vibration, and harshness (NVH) performance. At the same time, the lubricating oil flows into the mating clearance 51 of the spline 50 by part of its own gravity, without trapping air bubbles, thereby reducing the noise caused by air bubbles in the lubricating oil.

[0027] In the aforementioned electric drive assembly 100, the lubricating oil flowing out of the reducer 10 is guided and transmitted through the diversion component 11 into the oil guide pipe 41 with a variable diameter oil guide hole 411 inside the input shaft 20. This guides the lubricating oil to the mating clearance 51 of the spline 50 between the output end 31 of the motor shaft 30 and the input shaft 20, thereby achieving active lubrication and effective cooling of the spline 50 at the transmission position, reducing the friction and wear of the spline 50, and improving product reliability.

[0028] Please refer to the following: Figure 1 and Figure 2 In one embodiment, the inner wall of the shaft hole 23 is provided with a protrusion 231 protruding towards the motor shaft 30. The protrusion 231 is arranged circumferentially around the inner wall of the shaft hole 23, and the protrusion 231 is fitted into the recess 311 on the outer surface of the motor shaft 30 to block one side opening of the mating clearance 51. Specifically, the protrusion 231 is embedded in the recess 311 on the outer surface of the motor shaft 30 to form an axial limiting and radial sealing structure. That is, the fitting of the protrusion 231 and the recess 311 is equivalent to adding an oil-blocking structure on one side of the mating clearance 51, effectively reducing the risk of lubricating oil leakage.

[0029] Please refer to the following: Figure 1 , Figure 2 , Figure 4 and Figure 5 In one embodiment, the oil guide pipe 41 is further provided with an oil inlet end 412 and an oil outlet end 413 arranged axially opposite to each other. The oil guide hole 411 connects the oil inlet end 412 and the oil outlet end 413. The liquid outlet end 111 of the drainage component 11 extends into the oil guide hole 411 from the oil inlet end 412. The oil guide component 40 also includes a plurality of oil guide ribs 42, which are circumferentially spaced on the inner wall of the oil guide hole 411. Each oil guide rib 42 extends from the oil inlet end 412 to the oil outlet end 413. An oil slurry groove 43 is formed between two adjacent oil guide ribs 42 and the hole wall of the oil guide hole 411 to accommodate the lubricating oil flowing into the oil guide pipe 41 from the oil inlet end 412.

[0030] Specifically, the oil guide pipe 41 has a clearly defined oil inlet end 412 (near the reducer 10 side, i.e., towards the first end 21 of the input shaft 20) and an oil outlet end 413 (near the motor shaft 30 side, i.e. towards the spline 50 mating clearance 51) in the axial direction. The oil guide hole 411 passes through the oil inlet end 412 and the oil outlet end 413, forming a directional lubrication channel leading to the spline 50 mating clearance 51, ensuring that the flow direction of the lubricating oil is controllable and the flow path is clear.

[0031] Meanwhile, the oil guide ribs 42 on the inner wall of the oil guide hole 411 are elongated protrusions. The two adjacent oil guide ribs 42 together with the inner wall of the oil guide hole 411 form an oil buffer groove 43. When the lubricating oil flows directly from the oil inlet 412 into the oil guide pipe 41 from the outlet 111 of the diversion component 11, the flow rate may be unstable due to speed fluctuations and oil pressure changes. The oil buffer groove 43 can temporarily store some lubricating oil and allow the lubricating oil to enter the spline 50 mating clearance 51 from multiple directions at the same time, reducing the risk of local dry friction caused by single-point oil supply, thereby improving the uniformity of circumferential lubrication of the spline 50 tooth surface.

[0032] Please refer to the following: Figure 1 , Figure 2 and Figure 4 In one embodiment, the oil guide pipe 41 is interference-fitted into the input shaft 20. When the input shaft 20 rotates, the oil guide pipe 41 rotates synchronously. At this time, the inlet end 112 of the oil guide pipe 41 always maintains a fixed relative position with the outlet end 111 of the drainage component 11, and the outlet end 413 of the oil guide pipe 41 always maintains a fixed relative position with the mating clearance 51 of the spline 50, ensuring that the lubricating oil can be accurately and continuously injected into the friction pair.

[0033] In one embodiment, the number of oil guide ribs 42 is 3 to 8, for example, 3, 5 and 8, depending on the requirements, and is not limited here.

[0034] Please refer to it again. Figure 1 , Figure 2 , Figure 4 and Figure 5 In one embodiment, since the diameter of the oil guide hole 411 increases towards the direction closer to the motor shaft 30, that is, the diameter of the oil guide hole 411 gradually increases from the oil inlet end 412 to the oil outlet end 413, the hole wall of the oil guide hole 411 has an inclined slope structure. When the oil guide pipe 41 rotates at high speed, the centrifugal force generated will form a thrust on the inclined oil guide hole 411 hole wall, so that the lubricating oil can enter the mating clearance 51 of the spline 50. The higher the speed, the greater the centrifugal force, and the greater the thrust of the lubricating oil, which is more conducive to the lubrication of the high-speed spline 50.

[0035] Correspondingly, the volume of the oil trough 43 formed by two adjacent oil guide ribs 42 also gradually increases from the oil inlet end 412 to the oil outlet end 413, thereby matching different lubrication requirements.

[0036] Please continue reading. Figure 1 , Figure 2 , Figure 4 and Figure 5 In one embodiment, each oil guide rib 42 includes a first oil guide portion 421 and a second oil guide portion 422. The first oil guide portion 421 extends along the axial direction of the oil guide hole 411 and extends from the oil inlet end 412 to the oil outlet end 413. The first oil guide portion 421 is the main body constituting the oil guide rib 42 and plays the role of axial flow guide skeleton. The second oil guide 422 is disposed near the oil inlet end 412, and one end of the second oil guide 422 is connected to the first oil guide 421, while the other end extends radially along the oil guide hole 411. At least a portion of the outer wall of the liquid outlet end 111 abuts against the second oil guide 422, that is, the liquid outlet end 111 extends directly into the oil guide hole 411 through the oil inlet end 412. At this time, since a portion of the outer wall of the liquid outlet end 111 abuts against the second oil guide 422, a sealed or semi-sealed structure is formed. That is, the second oil guide 422 can reduce the risk of lubricating oil entering the oil buffer 43 leaking back from the oil inlet end 412.

[0037] In one embodiment, the first oil guiding part 421 and the second oil guiding part 422 are integrally formed to improve the structural strength of the oil guiding rib 42.

[0038] Please refer to the following: Figure 1 , Figure 2 and Figure 5 In one embodiment, in the direction away from the first oil guide portion 421, the distance between the side surface of the second oil guide portion 422 facing away from the wall of the oil guide hole 411 and the wall of the oil guide hole 411 gradually decreases. That is, the surface of the second oil guide portion 422 facing away from the wall of the oil guide hole 411 has a sloping structure. While blocking the lubricating oil from flowing back from the oil inlet end 412 of the oil guide pipe 41, it can also be adapted to the flow guiding components 11 of different sizes, thereby improving the versatility of the oil guide component 40.

[0039] Please refer to the following: Figure 1 , Figure 2 and Figure 6 In one embodiment, the reducer 10 includes a reduction housing 12, which has a through hole 121 and an oil collection hole 122 communicating with the through hole 121. The first end 21 of the input shaft 20 is rotatably disposed in the through hole 121, and the shaft hole 23 communicates with the through hole 121. The liquid inlet end 112 of the flow guide assembly 11 is located in the through hole 121 to receive the lubricating oil flowing out of the reduction housing 12 and falling into the through hole 121 through the oil collection hole 122, and to transmit the received lubricating oil to the oil guide pipe 41 in the shaft hole 23 through the liquid outlet end 111.

[0040] Specifically, the reduction housing 12 is the main support structure of the reducer 10. The first end 21 of the input shaft 20 is inserted into the through hole 121 of the reduction housing 12 and can rotate relative to the reduction housing 12. The shaft hole 23 inside the input shaft 20 is directly connected to the through hole 121 so that the drainage assembly 11 receives the lubricating oil in the through hole 121 and transmits the lubricating oil to the oil guide tube 41 in the shaft hole 23. The oil collecting hole 122 is located near the through hole 121 (usually above the through hole 121). The oil collecting hole 122 collects the lubricating oil that falls or splashes inside the reduction housing 12 and directs it into the through hole 121.

[0041] Please refer to the following: Figure 1 and Figure 2 In one embodiment, the electric drive assembly 100 further includes a first bearing 60, which is disposed in the through hole 121 and sleeved on the outer periphery of the first end 21 of the input shaft 20, so that the input shaft 20 can rotate relative to the deceleration housing 12.

[0042] Please refer to the following: Figure 1 , Figure 2 , Figure 5 and Figure 6 In one embodiment, the drainage assembly 11 further includes an oil collecting member 113 and a drainage member 114. The oil collecting member 113 is disposed within the through hole 121 and has an inlet end 112. The oil collecting member 113 is used to collect lubricating oil flowing into the through hole 121 from the oil collecting hole 122. One end of the drainage member 114 is connected to the oil collecting member 113, and the other end extends into the oil guide pipe 41 inside the input shaft 20 and has an outlet end 111, so as to introduce the collected lubricating oil into the oil guide hole 411. The outer peripheral wall of the drainage member 114 abuts against the second oil guide portion 422.

[0043] Specifically, the oil collecting component 113 is used to capture and temporarily store the lubricating oil flowing from the oil collecting hole 122 into the through hole 121, preventing the lubricating oil from splashing disorderly or flowing directly out of the through hole 121, thus achieving local enrichment. One end of the guide component 114 is fixed to the oil collecting component 113 to receive the collected lubricating oil, and the other end extends into the oil guide tube 41 inside the input shaft 20, directly connecting to the oil guide hole 411, and directing the lubricating oil in the oil collecting component 113 into the oil inlet end 412 of the oil guide tube 41.

[0044] Meanwhile, because the outer peripheral wall of the drain element 114 abuts against (i.e., in physical contact or in close contact with) the second oil guide portion 422, the abutment forms a near-sealed annular contact, preventing radial leakage of lubricating oil between the outlet end 111 of the drain element 114 and the inlet end 412 of the oil guide pipe 41. Especially when the input shaft 20 rotates at high speed, the abutment between the outer peripheral wall of the drain element 114 and the second oil guide portion 422 can also resist lubricating oil overflow caused by centrifugal force.

[0045] Understandably, the drain element 114 is usually a slender tubular or semi-circular structure, which is prone to vibration or bending. This drain element 114 abuts against the rigid second oil guide part 422, which can enhance the vibration resistance of the drain element 114 and reduce its risk of fatigue fracture.

[0046] In one embodiment, when the distance between the side surface of the second oil guide portion 422 facing away from the wall of the oil guide hole 411 and the wall of the oil guide hole 411 gradually decreases, the guide member 114 can be configured as a slightly inclined structure (i.e., having a slightly inclined guide surface), so that the lubricating oil flows out of the guide member 114 and immediately flows into the oil guide hole 411, and then enters the oil buffer groove 43, reducing the risk of generating impact eddies.

[0047] During actual lubrication, the lubricating oil in the reduction housing 12 flows through the oil collecting hole 122 into the through hole 121. The oil collecting component 113 captures the lubricating oil and transports it to the guide component 114. The guide component 114 accurately injects the lubricating oil into the guide pipe 41. After entering the guide hole 411, the lubricating oil is stably transported through the oil buffer groove 43 and finally passes through the oil outlet 413 to lubricate the spline 50 (see reference). Figure 4 The lubrication loop is completed by adjusting the clearance 51 of the spline 50. It can be seen that the entire lubrication process does not require an external pump, saving energy and ensuring sufficient lubrication of the clearance 51 of the spline 50 under high speed and low viscosity lubricating oil. Simultaneously, a passive oil inlet method is adopted, utilizing the centrifugal force generated by the rotation of the input shaft 20 to push the lubricating oil into the clearance 51 of the spline 50. This simplifies the design of the active oil circuit and reduces oil resistance. Furthermore, because centrifugal force is used to propel the lubricating oil, no additional vibration sources are generated, thus reducing NVH (noise, vibration, and harshness) issues.

[0048] Please refer to it again. Figure 1 , Figure 2 and Figure 6 In one embodiment, the oil collecting component 113 includes a first oil collecting part 1131 and a second oil collecting part 1132. One end of the first oil collecting part 1131 is connected to one side wall of the through hole 121, and the other end extends radially toward the center of the through hole 121. One end of the second oil collecting part 1132 is connected to the other side wall of the through hole 121, and the other end extends radially toward the center of the through hole 121 and connects to the end of the first oil collecting part 1131 away from the wall of the through hole 121. The first oil collecting part 1131 and the second oil collecting part 1132 are inclined in opposite directions. A draining component 114 is connected at the connection point between the first oil collecting part 1131 and the second oil collecting part 1132, and the draining component 114 is suspended within the through hole 121.

[0049] Specifically, the relatively inclined structure of the first oil collecting part 1131 and the second oil collecting part 1132 makes the oil collecting part 113 form a funnel-shaped channel. When the lubricating oil flows from the oil collecting hole 122 into the through hole 121, it falls under gravity or is thrown towards the hole wall of the through hole 121 by centrifugal force. At this time, the inclined first oil collecting part 1131 and the second oil collecting part 1132 can guide the lubricating oil to converge towards the center along its inclined surface, reducing the risk of lubricating oil remaining in the dead corner at the edge of the through hole 121.

[0050] All the collected lubricating oil eventually flows to the connection between the first oil collection section 1131 and the second oil collection section 1132, which becomes the lowest potential energy point or the oil collection focus, making it easy for the guide member 114 to take oil from here and guide the lubricating oil into the oil guide pipe 41.

[0051] The guide member 114 does not contact the inner wall of the through hole 121 or other components, but is supported only by the oil collecting member 113 and extends freely into the input shaft 20. Its suspended configuration avoids the formation of additional support points between itself and the wall of the through hole 121, thereby reducing the risk of additional support points interfering with the flow of lubricating oil or the rotation of the input shaft 20.

[0052] In one embodiment, the oil collecting component 113 and the drainage component 114 are integrally formed, which improves the structural stability of the oil collecting component 113 and the drainage component 114. In other embodiments, the oil collecting component 113 and the drainage component 114 may also be separate structures, which are fixed by welding or bonding, etc., depending on the requirements, and are not limited here.

[0053] Please continue reading. Figure 1 , Figure 2 and Figure 6 In one embodiment, the electric drive assembly 100 further includes a drive housing 70 disposed on one side of the reduction housing 12, and the second end 22 of the input shaft 20 is rotatably connected to the drive housing 70. The drive housing 70 and the reduction housing 12 are typically connected by bolts or integrally cast to form the main load-bearing frame of the electric drive assembly 100. The first end 21 of the input shaft 20 is rotatably disposed in the through hole 121 of the reduction housing 12, and the second end 22 is rotatably connected to the drive housing 70 to drive the motor shaft 30 connected to the drive housing 70 to rotate.

[0054] Please refer to it again. Figure 1 and Figure 2 In one embodiment, the electric drive assembly 100 further includes a second bearing 80, which is sleeved on the outer periphery of the second end 22 of the input shaft 20 so that the input shaft 20 can rotate relative to the drive housing 70.

[0055] Please refer to the following: Figure 1 , Figure 2 and Figure 7This application also provides a vehicle 200, including the above-described electric drive assembly 100.

[0056] In the aforementioned vehicle 200, lubricating oil flowing from the reducer 10 enters the electric drive assembly 100 via the shaft hole 23. Combined with the oil guide pipe 41 having a variable diameter guide hole 411, the lubricating oil can be guided to the spline 50 (see reference) between the output end 31 of the motor shaft 30 and the input shaft 20. Figure 4 At the fitting clearance 51, active lubrication and effective cooling of the spline 50 transmission position are achieved, thereby reducing the friction and wear of the spline 50 and improving product reliability.

[0057] The above are merely embodiments of this application and do not limit the scope of this patent application. Any equivalent structural or procedural changes made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the scope of patent protection of this application.

Claims

1. An electric drive assembly, characterized in that, The electric drive assembly includes: The speed reducer is equipped with a flow-draining assembly for receiving lubricating oil from within the speed reducer. The input shaft has a first end and a second end arranged axially opposite to each other, and a shaft hole connecting the first end and the second end. The first end is rotatably connected to the reducer, and the liquid outlet end of the drainage assembly is located inside the first end of the shaft hole. The motor shaft has an output end that extends into the shaft hole from the second end, and a spline is sleeved on the outer periphery of the output end. The spline is connected to the hole wall of the shaft hole, and there is a fitting clearance between the outer periphery of the spline and the hole wall of the shaft hole. An oil guiding component includes an oil guiding pipe disposed within the shaft hole and located on the side of the output end facing the first end. The oil guiding pipe has an axial oil guiding hole, and the outlet end extends into the oil guiding hole. In the axial direction, the diameter of the oil guiding hole increases towards the direction close to the motor shaft. The oil guiding hole connects to the mating clearance so that the lubricating oil flowing out of the outlet end flows into the mating clearance through the oil guiding hole.

2. The electric drive assembly according to claim 1, characterized in that, The oil guide pipe is further provided with an oil inlet end and an oil outlet end arranged axially opposite to each other. The oil guide hole connects the oil inlet end and the oil outlet end. The oil outlet end extends from the oil inlet end into the oil guide hole. The oil guide component also includes: Multiple oil guide ribs are spaced circumferentially on the inner wall of the oil guide hole. Each oil guide rib extends from the oil inlet end to the oil outlet end. An oil retardation groove is formed between two adjacent oil guide ribs and the wall of the oil guide hole to accommodate the lubricating oil flowing into the oil guide pipe from the oil inlet end.

3. The electric drive assembly according to claim 2, characterized in that, Each of the aforementioned oil guide ribs includes: A first oil guide portion is provided, extending along the axial direction of the oil guide hole, and the first oil guide portion extends from the oil inlet end to the oil outlet end; The second oil guide is disposed near the oil inlet end, and one end of the second oil guide is connected to the first oil guide, and the other end extends along the radial direction of the oil guide hole, wherein at least a portion of the outer wall of the liquid outlet end abuts against the second oil guide.

4. The electric drive assembly according to claim 3, characterized in that, In the direction away from the first oil guide portion, the distance between the side surface of the second oil guide portion facing away from the oil guide hole wall and the oil guide hole wall gradually decreases.

5. The electric drive assembly according to claim 3, characterized in that, The speed reducer includes: The reduction gear housing has a through hole and an oil collection hole communicating with the through hole. The first end of the input shaft is rotatably disposed in the through hole, and the shaft hole communicates with the through hole. The liquid inlet end of the drainage assembly is located in the through hole to receive lubricating oil flowing out of the reduction gear housing and falling into the through hole through the oil collection hole, and to transfer the received lubricating oil to the oil guide pipe in the shaft hole through the liquid outlet end.

6. The electric drive assembly according to claim 5, characterized in that, The drainage component includes: An oil collecting component is provided in the through hole and has the liquid inlet end. The oil collecting component is used to collect lubricating oil flowing into the through hole from the oil collecting hole. A guide member has one end connected to the oil collecting member and the other end extending into the oil guide pipe inside the input shaft and having the liquid outlet end, so as to introduce the collected lubricating oil into the oil guide hole, wherein the outer peripheral wall of the guide member abuts against the second oil guide part.

7. The electric drive assembly according to claim 6, characterized in that, The oil collection component includes: The first oil collection part is connected at one end to one side wall of the through hole, and the other end extends radially toward the center of the through hole; The second oil collecting part has one end connected to the other side wall of the through hole, and the other end extends radially toward the center of the through hole and is connected to the end of the first oil collecting part away from the wall of the through hole. The first oil collecting part and the second oil collecting part are inclined in opposite directions. The draining member is connected at the connection point between the first oil collecting part and the second oil collecting part, and the draining member is suspended in the through hole.

8. The electric drive assembly according to claim 1, characterized in that, The inner wall of the shaft hole is provided with a protrusion that protrudes toward the motor shaft. The protrusion is arranged circumferentially around the inner wall of the shaft hole, and the protrusion is fitted into the recess on the outer surface of the motor shaft to block one side opening of the mating gap.

9. The electric drive assembly according to claim 5, characterized in that, The electric drive assembly also includes: A drive housing is disposed on one side of the reduction housing, and the second end of the input shaft is rotatably connected to the drive housing.

10. A vehicle, characterized in that, The electric drive assembly included in any one of claims 1-9 above.

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