WO2024087635A1

WO2024087635A1 - Inner-ring-gear shaft, input shaft assembly, hybrid electric drive assembly, and vehicle

Info

Publication number: WO2024087635A1
Application number: PCT/CN2023/098280
Authority: WO
Inventors: 刘宏; 付丽; 雷君; 聂少文; 刘欢
Original assignee: 东风汽车集团股份有限公司
Priority date: 2022-10-24
Filing date: 2023-06-05
Publication date: 2024-05-02
Also published as: CN115875425B; CN115875425A

Abstract

An inner-ring-gear shaft (200), an input shaft assembly (900), a hybrid electric drive assembly (1000), and a vehicle. The inner-ring-gear shaft (200) can be sleeved outside a planetary gear set (100) as a whole, and serves as a part of the planetary gear set (100); the inner-ring-gear shaft (200) is mounted on a housing assembly (300) by means of a support bearing, and can be provided with positions where a plurality of members are mounted; and the inner-ring-gear shaft (200) is in transmission connection with an inner ring gear of the planetary gear set (100), and serves as a part of the planetary gear set (100) to take part in the operation of the planetary gear set.

Description

Internal gear ring shaft, input shaft assembly, hybrid electric drive assembly and vehicle

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims priority to Chinese patent application No. 202211306028.9 filed on October 24, 2022, the entire contents of which are incorporated herein by reference.

Technical Field

The present invention belongs to the technical field of planetary gear transmission devices, and in particular relates to an inner ring gear shaft, an input shaft assembly, a hybrid electric drive assembly and a vehicle.

Background technique

With the development of electric drive systems, all-in-one has gradually become a major trend. High integration can reduce the weight of components, reduce costs, reduce vehicle load, and enhance the carrying capacity of electric drive assemblies. For hybrid systems with loads, in addition to high integration, compact structural layout is also an important dimension for reducing volume and enhancing carrying capacity.

In the prior art, the research on hybrid electric drive assembly is mostly focused on the power split transmission architecture, power distribution mode and other aspects. For example, the Chinese invention application with publication number CN110303865A, "Continuously Variable Transmission System with Series Dual Motor Differential Power Split", discloses a power split transmission architecture. However, there are few records of research on high integration and low functional volume of hybrid electric drive.

Summary of the invention

To solve the above technical problems, the present invention provides an inner gear ring shaft, an input shaft assembly, a hybrid electric drive assembly and a vehicle. By providing an inner gear ring shaft, multiple systems are highly integrated, the functional volume of the electric drive is reduced, and thus more flexible layout and loading performance are achieved.

According to a first aspect of the present disclosure, there is provided an inner gear ring shaft, which is used to be sleeved on the outside of a planetary gear row and installed on a housing assembly through a support bearing; the inner gear ring shaft comprises: a sleeve portion, which is used to be sleeved on the sun gear shaft or the planetary carrier shaft of the planetary gear row, and the sleeve portion is provided with at least one first mounting position for installing an actuator; a cover portion, which is connected to the sleeve portion and is used for transmission connection with the inner gear ring of the planetary gear row; wherein the cover portion and/or the sleeve portion are provided with at least one assembly position for setting the support bearing; the cover portion and/or the sleeve portion are provided with at least one second mounting position for setting a gear.

According to a second aspect of the present disclosure, an input shaft assembly is provided, comprising: a planetary gear for connecting to an engine, at least one actuator, at least one support bearing, at least one gear and the above-mentioned inner ring gear shaft; the inner ring gear shaft is sleeved on the sun gear shaft or the planetary carrier shaft of the planetary gear, and the cover portion of the inner ring gear shaft is transmission-connected to the inner ring gear of the planetary gear; the at least one actuator is installed on the at least one first installation position; the at least one support bearing is arranged on the at least one assembly position; and the at least one gear is arranged on the at least one second installation position.

According to a third aspect of the present disclosure, a hybrid electric drive assembly is provided, comprising: a housing assembly; and the above-mentioned input shaft assembly, installed inside the housing assembly.

According to a fourth aspect of the present disclosure, a vehicle is provided, comprising the hybrid electric drive assembly mentioned above; or, comprising the input shaft assembly mentioned above; or, comprising the inner gear ring shaft mentioned above.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the following briefly introduces the drawings required for the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present disclosure, and those skilled in the art can obtain other drawings based on these drawings without creative work.

In order to more completely understand the present disclosure and its beneficial effects, the following description will be made in conjunction with the accompanying drawings. In the following description, the same reference numerals represent the same parts.

FIG1 is a schematic diagram of the structure of an inner gear ring shaft according to some embodiments of the present disclosure;

FIG2 is a full cross-sectional view of the inner gear ring shaft of FIG1 ;

FIG3 is a schematic structural diagram of an input shaft assembly according to some embodiments of the present disclosure;

FIG4 is a schematic structural diagram of an internal lubrication passage of the input shaft assembly of FIG3 ;

FIG5 is an overall structural diagram of a hybrid electric drive assembly according to some embodiments of the present disclosure;

FIG6 is a schematic diagram of the structure of the hybrid electric drive assembly of FIG5 after removing the end cover; and

FIG. 7 is a schematic diagram of the structure of the hybrid electric drive assembly of FIG. 5 with the right housing removed.

Explanation of the reference numerals: 10 - oil guide pipe, 11 - oil outlet hole, 12 - oil outlet port; 20 - oil guide member; 30 - bushing; 40 - actuator, 41 - gear hub, 42 - coupling gear, S1 - first actuator, S2 - second actuator; 50 - first gear gear, 51 - gear ring part, 52 - connecting part; 60 - second gear gear; 70 - retaining spring; 80 - bushing.

100-planetary row; 110-sun gear shaft, 111-first hollow cavity, 1111-oil storage cavity, 1112-expanding section, 112-fourth oil guide hole, 113-bearing mounting groove; 120-planet carrier, 121-planet carrier shaft, 122-connecting plate, 123-planetary gear shaft, 124-oil collecting cavity, 1241-large hole section, 1242-small hole section, 125-first oil guide hole, 126-second oil guide hole, 1261-axial oil guide hole, 1262-radial oil guide hole, 127-third oil guide hole ; 130-sun gear; 140-planet gear; 150-inner ring gear; 160-lubrication channel; 171-planet gear bearing; 172-first planet carrier bearing; 173-second planet carrier bearing; 174-intermediate bearing; 175-first support bearing; 176-second support bearing; 177a-needle bearing for mounting the first gear gear, 177b-needle bearing for mounting the inner ring gear shaft, 177c-needle bearing for mounting the second gear gear; 178-thrust bearing; 179-ball bearing.

200-inner gear ring shaft, 201-inner hole; 210-sleeve portion; 220-cover portion, 221-gear sleeve portion, 222-baffle portion, 223-inner spline; 230-first mounting position; 240-assembly position, 241-inner hole wall; 250-second mounting position; 260-limiting structure, 261-circlip groove, 262-end face, 263-convex edge, 264-hole shoulder; 270-oil guide hole; 280-oil guide groove.

1000-hybrid electric drive assembly; 300-housing assembly; 301-oil inlet channel; 302-shaft gear installation cavity; 303-motor installation cavity; 310-right housing; 320-left housing, 321-middle plate; 330-end cover. 400-motor assembly, 401-generator, 402-drive motor; 410-rotor, 411-second hollow cavity; 500-shift mechanism assembly; 600-intermediate shaft gear assembly; 700-differential assembly; 800-controller assembly; 900-input shaft assembly.

Detailed ways

The following will be combined with the drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present disclosure.

According to the first aspect of the present disclosure, there is provided an inner gear ring shaft 200, which can be sleeved outside the planetary gear row 100 as a whole and serve as a part of the planetary gear row 100. The inner gear ring shaft 200 is installed on the housing assembly 300 through a support bearing, and multiple installation positions of components can be set on it. FIG. 1 is a schematic structural diagram of the inner gear ring shaft according to some embodiments of the present disclosure; FIG. 2 is a full cross-sectional view of the inner gear ring shaft of FIG. 1. As shown in FIG. 1 and FIG. 2, the inner gear ring shaft 200 may include a sleeve portion 210 and a cover portion 220. The sleeve portion 210 is a sleeve structure and can be sleeved on a shaft, such as the sun gear shaft 110 or the planet carrier shaft 121 of the planetary gear row 100. The sleeve portion 210 has a relatively long axial dimension, and a plurality of first installation positions 230 for installing the actuator 40, or an assembly position 240 for setting the support bearing, and a second installation position 250 for setting the gear can be set on it along the axial direction. The cover 220 is in transmission connection with the inner gear ring 150 of the planetary gear set 100, and participates in the operation of the planetary gear set 100 as a part of the planetary gear set 100. The inner hole profile and the outer profile of the cover 220 can be used as the assembly position 240 for setting the support bearing or the second installation position 250 for setting the gear. Therefore, by setting the inner gear ring shaft 200, the transmission function of the planetary gear set 100, the installation of the actuator 40, the installation of the shift gear and the necessary axial limit function can be integrated at the same time, thereby greatly improving the integration of the electric drive system, reducing the functional volume of the electric drive, and making the electric drive system equipped with the inner gear ring shaft 200 have more flexible layout and loading performance.

The inner gear ring shaft 200 may be an integral structure, that is, the sleeve portion 210 and the cover portion 220 are integrally formed by casting or machining. The inner gear ring shaft 200 may also be a split structure, and the sleeve portion 210 and the cover portion 220 may be fixedly connected by welding, bonding, screwing, etc. In some embodiments, the inner gear ring shaft 200 is an integral structure formed by casting, and then the inner and outer surfaces are machined, and the material may be a metal material such as stainless steel and cast aluminum.

The cover portion 220 of the inner gear ring shaft 200 is disposed on the main body of the planetary gear set 100. The planetary gear 140 and the inner gear ring 150 are both located in the inner hole of the cover portion 220. In some embodiments, the cover portion 220 includes a gear sleeve portion 221 and a baffle portion 222, wherein the inner ring of the baffle portion 222 is connected to the shaft sleeve portion 210, and the outer ring is connected to the gear sleeve portion 221. The structure of the gear sleeve portion 221 is similar to that of the shaft sleeve portion 210, both of which are shaft sleeve structures, and the gear sleeve portion 221 is transmission-connected to the inner gear ring 150 of the planetary gear 100. The baffle portion 222 may be an annular flat plate, an annular spherical shell, or a three-dimensional structure composed of multiple connecting rods, and the specific structural form of the baffle portion 222 is not limited in the present disclosure. The shaft sleeve portion 210, the baffle portion 222, and the gear sleeve portion 221 may be an integrated structure, or may be fixedly connected by welding, bonding, screwing, or the like. The gear sleeve portion 221 and the inner gear ring 150 may be an integral structure or key-connected to achieve power transmission, so that the entire inner gear ring shaft 200 can rotate together with the inner gear ring 150 of the planetary gear set 100 .

In some embodiments, the gear sleeve 221 is connected to the inner gear ring 150 through a spline, and the inner profile of the gear sleeve 221 is provided with an inner spline 223; the inner profile of the inner gear ring 150 is a tooth meshing with the planetary gear 140, and the outer profile is an outer spline; the inner gear ring 150 is axially inserted into the inner spline 223, and one side of the inner gear ring 150 is axially limited by the inner end face 262 of the baffle portion 222. A retaining spring groove 261 is provided on the inner spline 223 of the gear sleeve 221. After the retaining spring 70 is installed in the retaining spring groove 261, the retaining spring 70 can axially limit the other side of the inner gear ring 150. This ensures that the gear sleeve 221 and the inner gear ring 150 will not move relative to each other in the axial direction. In addition, the retaining spring 70 is a detachable structure and will not affect the installation and removal of the inner gear ring 150.

The multiple component installation positions on the inner gear ring shaft 200 mainly include a first installation position 230 for installing the actuator 40, an assembly position 240 for setting the support bearing, and a second installation position 250 for setting the gear. In some embodiments, the actuator 40 can be a synchronizer or a clutch, and the actuator 40 can be loosely mounted on the inner gear ring shaft 200, or fixedly connected or transmission connected to the inner gear ring shaft 200. The support bearing is used to install the inner gear ring shaft 200 on the housing assembly 300. The gear can be a gear gear or a transmission gear that only plays a transmission role. The gear can be loosely mounted on the inner gear ring shaft 200, or fixedly connected or transmission connected to the inner gear ring shaft 200. In some embodiments, other component installation positions can also be set on the inner gear ring shaft 200 according to specific circumstances, such as a component installation position for installing an oil retaining member, a component installation position for setting a sensor, etc.

Among the above-mentioned component installation positions, the first installation position 230 is arranged on the sleeve portion 210, mainly because the action of the actuator 40 requires a certain axial space, and the axial dimension of the sleeve portion 210 is larger than that of the cover portion 220, which can meet the axial space required for the action of the actuator 40; on the other hand, the sleeve portion 210 is sleeved on the sun gear shaft 110 or the planetary carrier shaft 121 of the planetary gear row 100, and the cover portion 220 is sleeved on the sun gear 130, the planetary gear 140, and the inner ring gear 150 of the planetary gear row 100. The radial dimension of the sleeve portion 210 is smaller than that of the cover portion 220, which is convenient for arranging the actuator 40.

In some embodiments, the function of the actuator 40 is to change the transmission ratio of the planetary gear row 100, such as engaging the inner gear ring 150 of the planetary gear row 100 with the sun gear shaft 110 for joint rotation, engaging the inner gear ring 150 with the planet carrier for joint rotation, engaging the planet carrier with the sun gear shaft 110 for joint rotation, locking the inner gear ring 150, locking the sun gear 130, locking the planet gear 140, etc. In some embodiments, the first mounting position 230 is a key connection structure, so that the actuator 40 is transmission-connected with the inner gear ring shaft 200. Since the inner gear ring shaft 200 is transmission-connected with the inner gear ring 150 of the planetary gear row 100, the actuator 40 can change the movement of the inner gear ring 150, such as engaging the inner gear ring 150 with the sun gear shaft 110 or the planet carrier, or locking the inner gear ring 150.

A limiting structure 260 for axially limiting the actuator 40 is provided on the first installation position 230 to prevent axial relative rotation between the actuator 40 and the inner gear ring shaft 200. In some embodiments, the actuator 40 and the inner gear ring shaft 200 are splined, that is, the key connection structure of the first installation position 230 adopts an external spline, and the inner ring of the gear hub 41 and/or the coupling tooth 42 of the actuator 40 is provided with an internal spline. For the spline connection, the actuator 40 and the inner gear ring shaft 200 are limited by a retaining spring 70, and the corresponding limiting structure 260 is a retaining spring groove 261 provided on the external spline. The retaining spring 70 is stuck in the retaining spring groove 261 after the gear hub 41 and/or the coupling tooth 42 of the actuator 40 are installed in place.

As for the assembly position 240 for setting the support bearing and the second installation position 250 for setting the gear, the support bearing and the gear work in the form of rotation, and do not need to move axially, so they can be set on the cover part 220 and/or the sleeve part 210 according to actual needs. Usually, a shaft requires at least two bearings to be installed and fixed, so the number of assembly positions 240 is also more than two, and the more than two assembly positions 240 are distributed at intervals along the axial direction, that is, the gear sleeve part 221 and the sleeve part 210 are both provided with assembly positions 240. In some embodiments, the assembly position 240 of the cover part 220 is the inner hole wall 241 of the gear sleeve part 221, and the assembly position 240 of the sleeve part 210 is the polished rod section, and the support bearing is interference fit with the inner hole wall 241 and the polished rod section. A limiting structure 260 for limiting the axial position of the corresponding support bearing is provided between the assembly position 240 of the gear sleeve 221 and the installation position of the inner gear ring 150. The limiting structure 260 at this position can adopt end face limiting (such as shaft shoulder limiting, boss limiting) or retaining spring limiting. As shown in FIG. 2, in some In the embodiment, a hole shoulder is formed between the inner hole wall 241 of the gear sleeve portion 221 and the inner spline 223 , and the support bearing installed on the inner hole wall 241 is axially limited by the hole shoulder.

In some embodiments, a sleeve 80 is provided on the assembly position 240 of the sleeve portion 210, which can compensate for the diameter difference between the support bearing and the polished rod section on the one hand, and can be used for axial positioning of surrounding structural members on the other hand. The sleeve 80 is press-fitted with the corresponding polished rod section by interference fit, and the support bearing is installed on the sleeve 80 by interference fit. When the sleeve 80 is used for axial positioning of surrounding structural members, the surrounding structural members also play a role in axial positioning of the sleeve 80.

In some embodiments, the inner gear ring shaft 200 is suitable for a planetary gear transmission with gears, for example, a four-speed transmission requires at least two actuators 40 and at least two gears. Taking the Chinese invention application "A hybrid power drive system" with publication number CN113232501A as an example, the hybrid power drive system realizes the engine's four gears through two synchronizers and two gears, and the two synchronizers and the two gears are respectively recorded as: the first actuator S1, the second actuator S2, the first gear 50 and the second gear 60. The first actuator S1 and the second actuator S2 are both synchronizers, the first gear 50 is a large gear ring, which realizes the engine's third gear and the engine's fourth gear; the second gear 60 is a small gear ring, which realizes the engine's first gear and the engine's second gear.

The first gear gear 50 and the second gear gear 60 are respectively installed in two second installation positions 250. Since the first gear gear 50 and the second gear gear 60 are both loosely sleeved on the inner gear ring shaft 200, bearings, such as ball bearings, are installed in the inner holes of the first gear gear 50 and the second gear gear 60. FIG. 3 is a schematic diagram of the structure of the input shaft assembly according to some embodiments of the present disclosure. As shown in FIG. 3, in some embodiments, if the gear is connected to the inner gear ring shaft 200 in a transmission manner, no bearing is required. In order to reduce the axial length of the inner gear ring shaft 200, the gear sleeve portion 221 and the shaft sleeve portion 210 are both provided with a second installation position 250, that is, the first gear gear 50 is loosely sleeved on the gear sleeve portion 221 through a bearing, and the second gear gear 60 is loosely sleeved on the shaft sleeve portion 210 through a bearing.

The second mounting position 250 of the inner gear ring shaft 200 is provided with a limiting structure 260 for axially limiting the gear or the bearing of the gear, and the limiting structure 260 can be a limiting boss, a limiting step, or a groove for installing a retaining spring 70. If the limiting structure 260 is used to axially limit the bearing, a limiting boss, a limiting step, or a structural end face limiting is usually selected; if the limiting structure 260 is used to axially limit the gear, the gear is connected to the inner gear ring shaft 200 by transmission, such as a spline connection, and a retaining spring 70 is usually selected for axial limiting.

In the design of the limiting structure 260, in order to facilitate the installation of the actuator 40, gears, bearings and other structural parts, in some embodiments, the outer surface of the sleeve part 210 is designed as a stepped shaft. In some embodiments, the outer diameter of the sleeve part 210 increases from the far planetary gear end to the near planetary gear end, and each structural part is mounted one by one on the sleeve part 210. The stepped shaft itself can form a number of limiting steps for axial positioning. In addition, a number of convex edges 263 are also provided on the stepped shaft to limit the sleeve 80, bearings and the like in the axial direction.

In some embodiments, the inner gear ring shaft 200 is suitable for a planetary gear transmission with four gears, so there are two first mounting positions 230, two assembly positions 240, and two second mounting positions 250. In order to ensure that the two actuators 40 installed on the two first mounting positions 230 have sufficient axial shifting space, the two first mounting positions 230 are distributed at both ends of the sleeve portion 210. It should be noted that the first mounting position 230 can be used to install all components of the actuator 40, or only part of the components of the actuator 40, such as only installing the gear hub 41 of the synchronizer or the single-sided coupling gear 42. In order to reduce the axial size of the inner gear ring shaft 200 and improve the mounting performance of the hybrid transmission provided with the inner gear ring shaft 200, in some embodiments, the two assembly positions 240 and the two second mounting positions 250 are respectively provided on the sleeve portion 210 and the cover portion 220.

In some embodiments, since multiple bearings and gears need to be installed on the inner ring shaft 200, the lubrication requirements of the multiple bearings and gears need to be guaranteed, so splash lubrication or active lubrication can be used. Since the bearings and gears of the inner ring shaft 200 are compactly arranged and form an axial limiting effect on each other, it may be difficult to achieve the expected lubrication effect only by external splashing lubricating oil. Therefore, an active lubrication solution is adopted.

In some embodiments, the shaft sleeve 210 is provided with at least one oil guide hole 270 penetrating the sleeve wall of the shaft sleeve 210. The oil guide holes 270 are usually arranged in a plurality along the circumferential direction. The plurality of oil guide holes 270 located in the same cross section are grouped together. Then, the shaft sleeve 210 may be provided with a plurality of groups of oil guide holes 270 along its axial direction. In some embodiments, the outer surface of the shaft sleeve 210 is provided with an oil guide groove 280 connected to the oil guide hole 270. The oil guide groove 280 is connected to a group of oil guide holes 270. The specific number of the oil guide grooves 280 is determined according to actual needs. The oil guide groove 280 is an inwardly concave groove. By providing the oil guide groove 280, the lubricant flowing out of the oil guide hole 270 can be The oil is evenly distributed along the circumferential direction. In addition, since the oil guide groove 280 is a groove, the groove can also be used as a tool relief groove when machining the outer surface of the inner gear ring shaft 200.

In some embodiments, the cover portion 220 may also be provided with an oil guide hole 270, which may be selectively provided on the gear sleeve portion 221 and/or the baffle portion 222 to facilitate the lubricating oil to enter and exit the inner hole of the cover portion 220. As shown in FIG2 , in some embodiments, the baffle portion 222 may be provided with a plurality of oil guide holes 270, which are arranged to be inclined outwardly along the splashing direction, so that the splashed lubricating oil is thrown out from the oil guide hole 270 when the planetary gear 100 rotates, and lubricating the external structural parts of the inner gear ring shaft 200.

Based on the same inventive concept, according to the second aspect of the present disclosure, an input shaft assembly 900 is also provided, which can be applied to a hybrid electric drive assembly or a common gearbox, and the input shaft assembly 900 is connected to the output shaft of the engine. FIG. 3 is a schematic structural diagram of an input shaft assembly according to some embodiments of the present disclosure; FIG. 4 is a schematic structural diagram of an internal lubrication channel of the input shaft assembly of FIG. 3 . As shown in FIG. 3 and FIG. 4 , the input shaft assembly 900 may include a planetary gear 100, at least one actuator 40, at least one support bearing, at least one gear, and the inner ring gear shaft 200 of the first aspect of the present disclosure. At least one actuator 40 of the input shaft assembly 900 is installed on at least one first mounting position 230 of the inner ring gear shaft 200; at least one support bearing of the input shaft assembly 900 is arranged on at least one assembly position 240 of the inner ring gear shaft 200; at least one gear of the input shaft assembly 900 is arranged on at least one second mounting position 250 of the inner ring gear shaft 200. That is to say, the number of the first installation position 230, the assembly position 240, and the second installation position 250 of the inner gear ring shaft 200 matches the number of the actuators 40, support bearings, and gears to be installed. Generally, one shaft requires two support bearings for installation and support; the number of actuators 40 is positively correlated with the gear design, for example, one actuator 40 realizes two gears; the number of gears is related to the transmission design, and in some embodiments, the gears can be matched with the actuator 40 to achieve gear shifting, or can be used as transmission gears to cooperate with other gears to achieve speed ratio adjustment.

The input shaft assembly 900 integrates the actuator 40, the planetary gear 100 and the gear at the same time, and the above structure is integrated into one body through the inner gear ring shaft 200, so the integration is high and the axial size is small. The planetary gear 100 is installed in the inner space of the inner gear ring shaft 200, and the actuator 40, the bearing and the gear are installed in the outer space, so that the input shaft assembly 900 can be assembled with the housing as an independent supply set during assembly, which reduces the assembly difficulty.

In some embodiments, the input shaft assembly 900 is a sub-assembly of a single planetary gearbox 100 transmission mechanism that can realize the fourth gear of the engine. There are two actuators 40, namely the first actuator S1 and the second actuator S2. The first actuator S1 and the second actuator S2 can use synchronizers (single or double) or clutches as needed. There are also two support bearings, namely the first support bearing 175 and the second support bearing 176. The first support bearing 175 and the second support bearing 176 can use ball bearings, needle bearings, thrust bearings, etc. Some embodiments use ball bearings. There are also two gears, namely the first gear gear 50 and the second gear gear 60. The first gear gear 50 and the second gear gear 60 both cooperate with the actuator 40 to achieve gear shifting.

In some embodiments, the first actuator S1 and the second actuator S2 are distributed at both ends of the sleeve portion 210. The first actuator S1/the second actuator S2 can be set to selectively connect the sun gear shaft 110 with the inner gear shaft 200, selectively connect the planetary carrier shaft 121 with the inner gear shaft 200, selectively connect the inner gear shaft 200 with the first gear position gear 50, or selectively connect the inner gear shaft 200 with the second gear position gear 60 according to actual needs. In some embodiments, the first actuator S1 adopts a synchronizer, having a gear hub 41 and coupling teeth 42 on both sides. The gear hub 41 of the first actuator S1 is transmission-connected with the first mounting position 230; the coupling teeth 42 on one side of the first actuator S1 are fixedly connected with the first gear position gear 50; the coupling teeth 42 on the other side of the first actuator S1 are fixedly connected with the second gear position gear 60. The first actuator S1 is used to selectively connect the inner gear shaft 200 with the first gear position gear 50 or the second gear position gear 60. The second actuator S2 also uses a synchronizer, having a gear hub 41 and coupling teeth 42 on both sides. The gear hub 41 of the second actuator S2 is transmission-connected to the sun gear shaft 110 of the planetary gear row 100, the coupling teeth 42 on one side of the second actuator S2 are transmission-connected to the shaft sleeve 210, and the coupling teeth 42 on the other side of the second actuator S2 are fixedly connected to the housing assembly 300. The second actuator S2 is used to connect the sun gear shaft 110 to the inner gear ring shaft 200 or the housing assembly 300 to achieve different speed ratio outputs of the planetary gear row 100. In order to improve the axial load-bearing capacity of the input shaft assembly 900, a thrust bearing is provided between the gear hub 41 of the second actuator S2 and the housing assembly 300, and the thrust bearing is sleeved on the sun gear shaft 110.

In some embodiments, the first support bearing 175 and the second support bearing 176 are respectively mounted on the sleeve portion 210 and the cover portion 220, the first support bearing 175 is disposed in the inner hole of the cover portion 220, and the second support bearing 176 is disposed in the first support bearing 175 through the sleeve 80. Between the first actuator S1 and the second actuator S2, the first support bearing 175 and the second support bearing 176 mainly play the role of supporting the inner gear ring shaft 200, so both can use ball bearings. The first support bearing 175 is axially limited by the end face 262 of the first mounting position 230, that is, the hole shoulder 264 formed by the first mounting position 230 of the cover part 220 and the supporting position; the second support bearing 176 is axially limited by the boss set on the sleeve 80. The inner ring of the first support bearing 175 and the outer ring of the second support bearing 176 are respectively interference fit with the bearing mounting holes of the housing assembly 300.

In some embodiments, the first gear gear 50 is loosely sleeved on the cover portion 220 through a needle bearing 177a, and the second gear gear 60 is loosely sleeved on the shaft sleeve portion 210 through a needle bearing 177c and is located between the first actuator S1 and the second support bearing 176. The first gear gear 50 and the second gear gear 60 are both gear rings, and the bearings installed in their inner holes are needle bearings. The first gear gear 50 and the second gear gear 60 can both rotate freely relative to the inner gear ring shaft 200.

In some embodiments, the first gear 50 is a large gear ring. The first gear 50 must not only meet the diameter requirement of being able to be mounted on the cover 220, but also meet the requirement of being connected to the first actuator S1 installed on the sleeve 210. Therefore, the first gear 50 can be configured to include a gear ring portion 51 and a connecting portion 52. The gear ring portion 51 is similar in structure to the gear sleeve portion 221 of the inner gear ring shaft 200, both of which are sleeve structures. The connecting portion 52 is similar in structure to the baffle portion 222 of the inner gear ring shaft 200, both of which are annular plate structures. The gear ring portion 51 and the connecting portion 52 can be an integrally formed structure, or connected and fixed by welding or threaded fasteners. The gear ring portion 51 is sleeved on the cover 220 through a needle bearing 177a, and the bearing is axially limited by a convex edge 263 provided on the outer surface of the cover 220. The connecting portion 52 is fixedly connected to the coupling tooth 42 on one side of the first actuator S1. The connecting portion 52 and the coupling tooth 42 of the first actuator S1 can be integrally formed, welded, or transmission-connected. The second gear 60 is fixedly connected to the coupling tooth 42 on the other side of the first actuator S1 , and the second gear 60 and the coupling tooth 42 of the first actuator S1 can be integrally formed, welded, or transmission-connected. The second gear 60 is axially limited by the sleeve 80 of the second support bearing 176 .

In order to further improve the axial bearing capacity of the input shaft assembly 900, as shown in FIG3, a thrust bearing 178 is provided between the connecting portion 52 and the cover portion 220. In some embodiments, a thrust bearing 178 may be provided between the connecting portion 52 and the baffle portion 222. That is, the first gear position gear 50 is sleeved on the inner gear ring shaft 200 through the needle bearing 177a and the thrust bearing 178, and is axially limited by the thrust bearing 178 and the end face 262 outside the baffle portion 222. The cover portion 220 of the inner gear ring shaft 200 is provided with an oil guide hole 270 that penetrates the wall thickness, so that the lubricating oil splashed in the planetary gear 100 can enter the gap between the first gear position gear 50 and the cover portion 220 through the oil guide hole 270 on the cover portion 220, and lubricate the needle bearing 177a and the thrust bearing 178 therein.

As shown in FIG3 , in the input shaft assembly 900, the sun gear shaft 110 or the planet carrier shaft 121 of the planetary row 100 is connected to the engine to realize the engine power input, and the inner gear ring shaft 200 is sleeved on the planet carrier shaft 121 or the sun gear shaft 110 of the planetary row 100 for output. For example, if the planetary row 100 uses the sun gear shaft 110 for input, the inner gear ring shaft 200 and the planet carrier shaft 121 are used as outputs, and the inner gear ring shaft 200 is correspondingly sleeved on the planet carrier shaft 121. If the planetary row 100 uses the planet carrier shaft 121 for input, the inner gear ring shaft 200 and the sun gear shaft 110 are used as outputs, and the inner gear ring shaft 200 is correspondingly sleeved on the sun gear shaft 110. The cover portion 220 of the inner gear ring shaft 200 is transmission-connected to the inner gear ring 150 of the planetary row 100, and in some embodiments, it can be integrally formed, welded or keyed. The inner gear ring shaft 200, the planet carrier shaft 121, and the sun gear shaft 110 need to rotate during operation, and there is a speed difference under certain working conditions, so a bearing needs to be installed between the inner gear ring shaft 200 and the sun gear shaft 110 or the planet carrier shaft 121. The inner ring of the bearing is sleeved on the sun gear shaft 110 or the planet carrier shaft 121, and the inner gear ring shaft 200 is sleeved on the outer ring of the bearing. In some embodiments, the inner gear ring shaft 200 is sleeved on the sun gear shaft 110 through two needle bearings 177b.

In some embodiments, the input shaft assembly 900 is applied to a hybrid electric drive assembly and has a parallel mode of engine drive and motor drive. The sun gear shaft 110 or the planetary carrier shaft 121 of the planetary row 100 of the input shaft assembly 900 is connected to the motor assembly 400. For example, the planetary row 100 adopts the planetary carrier shaft 121 as input, and the inner ring shaft 200 and the sun gear shaft 110 are used as outputs. The inner ring shaft 200 is mounted on the sun gear shaft 110, and the sun gear shaft 110 is provided with a connection structure for transmission connection with the motor assembly 400; if the planetary row 100 adopts the sun gear shaft 110 as input, and the inner ring shaft 200 and the planetary carrier shaft 121 are used as outputs, then the inner ring shaft 200 is provided with a connection structure for transmission connection with the motor assembly 400. In some embodiments, the planetary gear row 100 of the input shaft assembly 900 adopts a technical solution in which the planetary carrier shaft 121 is input, and the inner ring gear shaft 200 and the sun gear shaft 110 are used as outputs, and the inner ring gear shaft 200 is sleeved on the sun gear shaft 110 .

The planetary gear 100 is the main part of the power distribution. The lubrication of the planetary gear 100 is to ensure the normal operation of the input shaft assembly 900. The main lubrication requirement of the planetary gear row 100 lies in the planetary gear bearings 171. On the one hand, the planetary gear bearings 171 are numerous and widely distributed. On the other hand, since the installation position of the planetary gear bearings 171 is located in the area surrounded by the planetary carrier 120 and between the planetary gear 140 and the planetary gear shaft 123, it is difficult for the lubricating oil to enter the installation position of the planetary gear bearings 171 due to the obstruction of the planetary gear 140 and the planetary carrier 120. Therefore, the planetary gear bearings 171 are prone to ablation, affecting the use of the entire planetary gear row 100.

In order to improve the lubrication of the planetary gear 100, as shown in FIG4, in some embodiments, the planetary gear 100 is provided with a lubrication channel 160, and the sun gear shaft 110 of the planetary gear 100 is provided with a first hollow cavity 111 that penetrates in the axial direction. The sun gear shaft 110 can be integrally formed with the sun gear 130 of the planetary gear 100, or key-connected. In some embodiments, the sun gear shaft 110 is integrally formed with the sun gear 130. The planet carrier 120 of the planetary gear 100 is provided with an oil collecting cavity 124, and the first hollow cavity 111, the oil collecting cavity 124 and the lubrication channel 160 are sequentially connected, and the outlet of the lubrication channel 160 faces the planetary gear bearing 171 of the planetary gear 100. In order to facilitate lubrication of the external structure of the sun gear shaft 110, the sun gear shaft 110 is provided with a plurality of fourth oil guide holes 112 that are connected to the first hollow cavity 111, and the outlet of one of the plurality of fourth oil guide holes 112 faces the bearing between the sun gear shaft 110 and the inner gear ring shaft 200.

In some embodiments, the lubrication channel 160 of the planet carrier 120 may be an oil channel opened in the base material of the planet carrier 120, or may be an oil channel formed by enclosing external components, as long as the lubricating oil can be delivered to the installation location of the planetary gear bearing 171. In some embodiments, the planetary gear bearing 171 is a needle bearing, which may be a full needle bearing or a steel cage needle bearing. The planetary gear bearing 171 adopts a double-row needle bearing with a gasket in the middle. The gasket should form a gap with the planetary gear shaft 123 in the radial direction to ensure that the lubricating oil can enter the needle bearing and lubricate the roller surface of the needle bearing.

As shown in FIG. 4 , in some embodiments, the planet carrier 120 may include a planet carrier shaft 121, a connecting plate 122, and a plurality of planetary gear shafts 123 connected in sequence, the planetary gear 140 is sleeved on the planetary gear shaft 123, a planetary gear bearing 171 is installed between the planetary gear 140 and the planetary gear shaft 123, and the two sides of the planetary gear 140 are respectively meshed with the gear of the sun gear 130 and the gear of the inner gear ring 150 through gears. The planetary carrier shaft 121 is located at the center of the connecting plate 122, and the planetary gear shafts 123 are evenly distributed along the circumference with the planetary carrier shaft 121 as the center. The planetary carrier shaft 121 and the connecting plate 122 can be detachably connected by threaded fasteners, snap-fit structures, etc., or fixed by welding, or the planetary carrier shaft 121 and the connecting plate 122 are an integrated structure. In some embodiments, the planetary carrier shaft 121 is pressed on the connecting plate 122 by interference fit. The connecting plate 122 and the planetary gear shaft 123 can also be detachably connected by threaded fasteners, snap-fit structures, etc., or welded and fixed, or the connecting plate 122 and the planetary gear shaft 123 are an integrated structure, which is not limited in the present disclosure. The overall external shape and profile of the planetary carrier 120 are also not limited in the present disclosure, for example, the planetary carrier 120 can adopt a cage structure.

In some embodiments, the planet carrier shaft 121 may be provided with a connected oil collecting chamber 124 and a first oil guide hole 125, the oil collecting chamber 124 is located at the center of the planet carrier shaft 121, and in other embodiments, may be coaxial with the planet carrier shaft 121. The planetary wheel shaft 123 is provided with a second oil guide hole 126, and the outlet of the second oil guide hole 126 faces the planetary wheel bearing 171 of the planetary gear 100. An oil guide member 20 is provided on the outer side of the connecting plate 122, and the first oil guide hole 125, the gap between the oil guide member 20 and the connecting plate 122, and the second oil guide hole 126 are connected in sequence to form a lubrication channel 160. The oil guide member 20 guides the lubricating oil in the oil collecting chamber 124 that is thrown out of the first oil guide hole 125 under the action of centrifugation to the second oil guide hole 126.

In some embodiments, an intermediate bearing 174 is provided between the planet carrier shaft 121 and the sun gear shaft 110. The intermediate bearing 174 is a thrust bearing and can withstand a large axial force. One end of the sun gear shaft 110 is against the planet carrier shaft 121 through the thrust bearing. The thrust bearing can meet the working requirements of the planetary gear 100 under certain working conditions that there is a speed difference between the planet carrier 120 and the sun gear shaft 110. The intermediate bearing 174 can be located at the end of the sun gear shaft 110. In some embodiments, a concave bearing mounting groove 113 can be provided at the end of the sun gear shaft 110. The bearing mounting groove 113 is connected to the first hollow cavity 111, so that the internal gap of the intermediate bearing 174 is connected to the first hollow cavity 111, and the lubricating oil in the first hollow cavity 111 can enter the intermediate bearing 174.

The second oil guide hole 126 may be a channel extending radially and/or axially along the planetary gear shaft 123, or may be a channel extending circumferentially along the planetary gear shaft 123. That is, the second oil guide hole 126 may be an axial straight channel, a radial straight channel, an oblique straight channel, a curved channel, etc., which is not limited in the present disclosure. In some embodiments, the second oil guide hole 126 includes an axial oil guide hole 1261 extending axially along the planetary gear shaft 123 and at least one radial oil guide hole 1262 extending radially along the planetary gear shaft 123, and the outlet of the radial oil guide hole 1262 constitutes the outlet of the lubrication channel 160. The number of radial oil guide holes 1262 is determined according to the number of the planetary gear bearings 171. The diameter of the radial oil guide holes 1262 is determined by the size of the planetary gear shaft 123. Usually, there are more than two radial oil guide holes 1262. The outlets of the more than two radial oil guide holes 1262 are spaced and evenly distributed along the circumferential surface of the planetary gear shaft 123. For example, the second oil guide hole 126 includes an axial oil guide hole 1261 extending axially along the planetary gear shaft 123 and four radial oil guide holes 1262 extending radially along the planetary gear shaft 123. The four radial oil guide holes 1262 are distributed at 90 degrees to each other to ensure that the oil reaches the planetary gear bearing 171 and avoid sintering of the entire planetary gear row 100 due to insufficient lubrication of the planetary gear bearing 171. In some embodiments, the inlet of the axial oil guide hole 1261 is set to be a flared port; the flared port can be a circular flared port to reduce flow resistance. Along the axial direction of the planetary gear shaft 123, the aperture of the flared port gradually increases from the middle to the end, so as to facilitate the entry of lubricating oil into the axial oil guide hole 1261.

In some embodiments, a first planetary carrier bearing 172 may be installed on the planetary carrier 120, and the first planetary carrier bearing 172 is arranged in the lubrication channel 160, and the internal gap of the first planetary carrier bearing 172 is connected to the lubrication channel 160 for the circulation of lubricating oil. As shown in FIG3 and FIG4, the first planetary carrier bearing 172 is installed on the planetary carrier shaft 121 and is close to the connecting plate 122 of the planetary carrier 120. The first planetary carrier bearing 172 is a thrust bearing, and the loose ring of the thrust bearing is in contact with the connecting plate 122, and the tight ring of the thrust bearing is connected and/or in contact with an external fixing member (for example, a housing assembly 300 for installing the planetary gear 100), so that the planetary gear 100 is axially stable. A channel for the circulation of lubricating oil can be formed between the loose ring and the tight ring, and the roller of the thrust bearing can also be lubricated when the lubricating oil circulates between the loose ring and the tight ring. Of course, in some embodiments, the first planetary carrier bearing 172 can also be arranged at other positions of the planetary carrier 120, and completely separated from the lubrication channel 160, so as to avoid the internal structure of the first planetary carrier bearing 172 from generating flow resistance.

In some embodiments, in order to improve the rotation stability of the planet carrier 120, a second planet carrier bearing 173 is also installed on the planet carrier shaft 121. The second planet carrier bearing 173 adopts a needle bearing. For example, the planet carrier 120 is installed in the housing assembly 300 (for example, the right housing 310) through the second planet carrier bearing 173. The second planet carrier bearing 173 also needs lubrication during operation. For this purpose, the planet carrier shaft 121 is provided with a third oil guide hole 127 connected to the oil collecting chamber 124, and the outlet of the third oil guide hole 127 faces the second planet carrier bearing 173. In general, the oil collecting chamber 124 is required to accommodate the end of the oil guide pipe 10 near the planetary row 100, and store a certain amount of oil to be transported to the third oil guide hole 127. Taking into account that the second planetary carrier bearing 173 requires less lubricating oil than the planetary wheel bearing 171, in order to ensure that the planetary wheel bearing 171 is adequately supplied with oil, in some embodiments, the oil collecting chamber 124 has a stepped hole structure, wherein the large hole section 1241 is used to accommodate the end of the oil guide pipe 10 near the planetary row 100, and the small hole section 1242 is connected to the third oil guide hole 127.

Since the planet carrier 120, the sun gear shaft 110, etc. of the planetary gear row 100 have axial manufacturing and processing errors, there is usually a certain gap between the sun gear shaft 110 and the planet carrier 120. In some extreme cases, the lubricating oil flowing into this part will leak out through the gap in large quantities. In order to solve the above problem, in some embodiments, the sun gear shaft 110 is embedded in the oil guide pipe 10, and the oil guide pipe 10 is installed through the sun gear shaft 110 of the planetary gear row 100, for example, it is installed through the first hollow cavity 111, and the end of the oil guide pipe 10 near the planetary gear row 100 extends into the oil collecting cavity 124 to guide the oil in the sun gear shaft 110 into the oil collecting cavity 124 of the planetary gear row. By providing the oil guide pipe 10, when the axial oil guide channel is relatively long, the oil guide pipe 10 is used to transfer the lubricating oil from the lubricating oil inlet at the end of the far planetary gear 100 to the planetary carrier 120 of the planetary gear 100, so as to avoid the situation that the oil is thrown out and cannot reach the planetary gear 100 due to the centrifugal force formed by the high-speed operation of the sun gear shaft 110, and the near planetary gear end of the oil guide pipe 10 extends into the oil collecting chamber 124, which can reduce the leakage of the lubricating oil at the gap between the sun gear shaft 110 and the planetary carrier 120. The lubricating oil circulates in the lubrication channel 160 and finally flows to the planetary gear bearing 171 to lubricate the bearings of each planetary gear 140, ensure sufficient oil volume of the bearing, and avoid the safety problem of the whole vehicle caused by the ablation of the entire planetary gear 100.

The oil guide tube 10 is provided with a plurality of oil outlet holes 11 spaced apart along the axial direction and/or radial direction of the oil guide tube 10. A plurality of oil outlet holes 11 are usually provided along the axial direction of the oil guide tube, and the diameter and hole spacing of each oil outlet hole 11 are the same. A plurality of oil outlet holes 11 located at the same axial position can also be provided, and the plurality of oil outlet holes 11 located at the same axial position are spaced apart along the circumferential direction, so that the oil can flow evenly into the first hollow cavity 111 of the sun gear shaft 110. An additional oil outlet hole 11 can be provided at the axial position of the oil guide tube 10 corresponding to the installation position of the bearing.

In some embodiments, the distal planetary gear 100 end of the oil guide tube 10 is provided with more than one oil outlet 12. Since the oil outlet 12 is provided on the tube wall of the oil guide tube 10, oil can be discharged radially, reducing resistance and facilitating oil to enter the lubrication channel 160. The oil outlet 12 can be set as a slot with an opening or a complete hole, for example, the oil outlet 12 can be a U-shaped slot or a circular hole. The number of the oil outlets 12 is not limited in the present disclosure. For example, if the number of the oil outlets 12 is set to 3, the shapes of the 3 oil outlets 12 can be the same or different.

Since the inner diameter of the first hollow cavity 111 is larger than the outer diameter of the oil guiding tube 10, in order to ensure that the oil guiding tube 10 is stably installed in the first hollow cavity 111, in some embodiments, at least one bushing 30 is sleeved on the oil guiding tube 10, and the bushing 30 fills the gap between the oil guiding tube 10 and the cavity wall of the first hollow cavity 111. The bushing 30 plays a role in supporting the oil guiding tube 10, and the material of the bushing 30 is copper or composite plastic.

In some embodiments, taking the input shaft assembly 900 of the Chinese invention application “A hybrid power drive system” ( ) with publication number CN113232501A as an example, the structure of the input shaft assembly 900 can be set as follows:

The inner gear ring shaft 200 is supported on the right housing and the left housing of the housing assembly 300 by a ball bearing (first support bearing 175) and a ball bearing (second support bearing 176) mounted on the sleeve 80. On the outer side of the inner gear ring shaft 200, the large gear ring (first gear 50) is welded to the coupling tooth 42 on one side of the first synchronizer (first actuator S1) and is sleeved on the inner gear ring shaft 200 by a needle bearing 177a and a thrust bearing 178 to freely rotate around the inner gear ring shaft 200. The needle bearing 177a is axially limited by a shaft shoulder, and the thrust bearing 178 cooperates with the end face 262 of the inner gear ring shaft 200 for axial limitation. The gear hub 41 of the first synchronizer is connected to the outer spline of the inner gear ring shaft 200 through the inner spline to transmit torque, and the gear hub 41 of the first synchronizer is axially limited by the end face 262 of the inner gear ring shaft 200 and the retaining spring 70 installed in the retaining spring groove 261; the small ring gear (second gear 60) is welded to the combined tooth 42 of the first synchronizer and then installed on the outer side of the sleeve part 210 of the inner gear ring shaft 200 through the needle bearing 177c, so as to rotate freely around the inner gear ring shaft 200. The small ring gear (second gear 60) is axially limited by a sleeve 80 pressed onto the axial diameter of the inner ring gear shaft 200, and the needle bearing 177c is axially limited by the shoulders on both sides; the coupling tooth 42 on one side of the second synchronizer (second actuator S2) is connected to the external spline of the inner ring gear shaft 200 through an internal spline for power transmission, and the coupling tooth 42 of the second synchronizer is axially limited by the end face 262 of the sleeve 80 and the retaining spring 70 installed in the retaining spring groove 261.

Inside the inner gear ring shaft 200, the sun gear shaft 110 is supported in the inner hole 201 of the inner gear ring shaft 200 through two needle bearings 177b. The gear hub 41 of the first synchronizer is connected to the outer spline of the sun gear shaft 110 through the inner spline for torque transmission. The outer spline at the end of the sun gear shaft 110 is connected to the inner spline of the motor shaft of the generator 401 for power transmission; the motor shaft is supported on the middle plate 321 of the left housing 320 through the ball bearing 179. The inner gear ring 150 is matched with the inner spline of the inner gear ring shaft 200 through the outer spline, and is connected with the inner gear ring shaft 200 to rotate together. The inner gear ring 150 is axially limited by the end face 262 of the inner gear ring shaft 200 and the retaining spring 70 installed in the retaining spring groove 261. The inner gear ring 150 supports the entire planetary gear system on the inner gear ring shaft 200 by meshing with the planetary gears. The planet carrier 120 is mounted on the right housing through a needle bearing (the second planet carrier shaft 121 bears 173), the planet carrier shaft 121 is pressed onto the connecting plates 122 on both sides of the planet carrier 120 by interference fit, and the planetary gear 140 is mounted on the planet carrier shaft 121 through a needle bearing (planetary gear bearing 171), and the planetary gear 140 is respectively meshed with the inner ring gear 150 and the sun gear 130.

In the input shaft assembly 900 provided in some embodiments, the entire planetary gear system integrates the first actuator S1 and the second actuator S2, the 1/2 gear ring (the second gear 60) and the 3/4 gear ring (the first gear 50), and the planetary gear 100 through the inner gear ring shaft 200, and is connected to the motor through the inner side supporting sun gear shaft 110, and also integrates the lubrication system of the planetary gear bearing 171, the actuator 40, the gear gear and related bearings, and the cooling system of the motor. The inner gear ring shaft 200 provides a support structure for each system through the inner and outer surfaces, and is installed on the left and right shells of the shell assembly through the first support bearing 175 and the second support bearing 176 on both sides, so that the input shaft assembly 900 can be highly integrated, reducing the arrangement and installation positions and interfaces of other parts, so that the axial and radial dimensions of the electric drive system equipped with the input shaft assembly 900 can be reduced, reducing the functional volume of the electric drive system, reducing costs and enhancing its carrying capacity, making the product more competitive.

Based on the same inventive concept, a hybrid electric drive assembly 1000 is provided according to the third aspect of the present disclosure. FIG. 5 is an overall structural diagram of the hybrid electric drive assembly according to the third aspect of the present disclosure; FIG. 6 is a structural schematic diagram of the hybrid electric drive assembly of FIG. 5 after the end cover is removed; and FIG. 7 is a structural schematic diagram of the hybrid electric drive assembly of FIG. 5 after the right shell is removed. As described in FIG. 5 to FIG. 7, the hybrid electric drive assembly 1000 may include a shell assembly 300 and the input shaft assembly 900 of the second aspect of the present disclosure, and the input shaft assembly 900 is installed inside the shell assembly 300. The structure of the shell assembly 300 is designed according to the structure of the input shaft assembly 900, and it only needs to meet the installation requirements of the input shaft assembly 900, and the specific structure is not limited by the present disclosure.

The hybrid electric drive assembly 1000 may further include a motor assembly 400 connected to the housing assembly 300. The motor assembly 400 may be configured to include only one motor, or more than two motors. The motor assembly 400 is connected to the sun gear shaft 110 of the planetary gear row 100 to achieve power transmission between the motor and the planetary gear row 100. In some embodiments, the motor assembly 400 may include a generator 401 and a drive motor 402, and the rotor of the generator 401 is connected to the sun gear shaft 110 of the planetary gear row 100 by a transmission connection, for example, the rotor of the generator 401 is connected to the sun gear shaft 110 of the planetary gear row 100 by a spline.

The motor assembly 400 may be set to be integrated inside the housing assembly 300, or the motor assembly 400 may be external. In order to improve the integration of the hybrid electric drive assembly 1000, some embodiments adopt a solution in which the motor is built in. The housing assembly 300 may include a right housing 310, a left housing 320 and an end cover 330 connected in sequence. The right housing 310 and the left housing 320 enclose a shaft gear installation cavity 302. The planetary gear row 100 is located in the shaft gear installation cavity 302. The planetary carrier shaft 121 is supported on the right housing 310 through the first planetary carrier bearing 172 and the second planetary carrier bearing 173. The left housing 320 and the end cover 330 enclose a motor installation cavity 303, and the motor assembly 400 is located in the motor installation cavity 303. The rotor 410 of the generator 401 is supported on the left housing 320 and the end cover 330 through two bearings.

In some embodiments, the rotor 410 of the generator 401 is provided with a second hollow cavity 411 which penetrates axially, the oil inlet channel 301, the second hollow cavity 411 and the first hollow cavity 111 are connected in sequence, the rotor 410 of the motor assembly 400 is coaxially arranged with the planetary row 100, the lubricating oil introduced into the oil inlet channel 301 of the housing assembly 300 is introduced into the first hollow cavity 111 of the planetary row 100 through the second hollow cavity 411, the oil guide pipe 10 of the planetary row lubrication structure is installed in the second hollow cavity 411 and the first hollow cavity 111, the far planetary row 100 end of the oil guide pipe 10 is directly connected to the oil inlet channel 301 of the housing assembly 300, and the near planetary row 100 end of the oil guide pipe 10 is directly connected to the oil collecting cavity 124 of the planetary carrier 120. By connecting the rotor 410 of the motor assembly 400 in series with the internal oil circuit of the planetary gear 100, the rotor of the motor acts as a pipeline for lubricating oil, which simplifies the structure of the lubrication system and improves the integration and vehicle mountability of the hybrid electric drive assembly 1000.

An oil inlet channel 301 is provided in the end cover 330, and an oil pan is formed at the bottom of the left housing 320. The lubricating oil after lubricating the planetary gear 100 falls into the oil pan, and the external oil pump provides oil pumping power, so that the lubricating oil circulates in the oil pan, the oil inlet channel 301, the oil guide pipe 10, and the lubrication channel 160.

Since the rotor of the generator 401, the sun gear shaft 110 of the planetary gear 100, and the inner gear ring shaft 200 all need to be provided with bearings for installation support. In order to increase the bearing mounting holes, in some embodiments, the left housing 320 is provided with an intermediate plate 321, and the intermediate plate 321 is a cover body, which is fixedly connected to the left housing 320 by threaded fasteners or welding. The intermediate plate 321 is installed with a ball bearing 179 for supporting the rotor 410 of the generator 401, as shown in FIG3. In order to further improve the integration, the coupling teeth 42 of the actuator (specifically the second actuator S2) close to the generator 401 are fixedly connected to the intermediate plate 321, and specifically, the coupling teeth of the actuator can be directly processed on the intermediate plate 321.

As shown in FIG7 , in some embodiments, the hybrid electric drive assembly 1000 may further include a shift mechanism assembly 500, an intermediate shaft gear assembly 600, a differential assembly 700 and a controller assembly 800; the shift mechanism assembly 500, the intermediate shaft gear assembly 600 and the differential assembly 700 are all located in the shaft gear installation cavity 302; the shift mechanism assembly 500 and the intermediate shaft gear assembly 600 cooperate with the planetary gear 100 to realize the speed change and shifting functions, and the power is output to the wheel shaft system by the differential assembly 700. The controller assembly 800 is installed outside the housing assembly 300 and is used to control the operation of the motor assembly 400 and/or the shift mechanism assembly 500. Of course, the controller assembly 800 can also control the operation of the oil pump and some sensors (temperature sensors, pressure sensors, etc.) and other electronic devices set inside the hybrid electric drive assembly 1000. The specific contents of the shift mechanism assembly 500, the intermediate shaft gear assembly 600, and the controller assembly 800 may refer to the relevant disclosures of the prior art and will not be elaborated here.

Based on the same inventive concept, a vehicle is provided according to the fourth aspect of the present disclosure, including the hybrid electric drive assembly 1000 of the third aspect of the present disclosure, that is, the vehicle is a hybrid vehicle, powered by an engine and a motor. Since the vehicle is equipped with the hybrid electric drive assembly 1000 of the third aspect of the present disclosure, it has at least all the beneficial effects brought by the technical solution of the third aspect of the present disclosure. The hybrid electric drive assembly 1000 has high integration and small size, and can be installed in the engine compartment of vehicles of different models. Other structures of the vehicle that are not described in detail can refer to the relevant disclosure of the prior art, and will not be described in detail here.

Based on the same inventive concept, according to the fifth aspect of the present disclosure, a vehicle is provided, including the input shaft assembly 900 of the second aspect of the present disclosure, that is, the vehicle can be a hybrid vehicle or a pure electric vehicle or a common fuel vehicle, powered by an engine and/or a motor, and the input shaft assembly 900 of the second aspect of the present disclosure can achieve the effect of shifting and changing speed. Other structures of the vehicle not described in detail can refer to the relevant disclosure of the prior art, and will not be described here.

Based on the same inventive concept, according to the sixth aspect of the present disclosure, a vehicle is also provided, including the inner gear ring shaft of the first aspect of the present disclosure, that is, the vehicle can be a hybrid vehicle or a pure electric vehicle or a common fuel vehicle, powered by an engine and/or a motor, and the inner gear ring shaft of the first aspect of the present disclosure can be applied to the gearbox of the vehicle, or the wheel hub motor system. Other undetailed structures of the vehicle can refer to the relevant disclosure of the prior art, and will not be described here.

According to some embodiments of the present disclosure, the inner gear ring shaft provided in the embodiments of the present disclosure can be sleeved outside the planetary gear row as a whole and serve as a part of the planetary gear row. The inner gear ring shaft is installed on the housing assembly through a support bearing, and multiple installation positions of components can be set on it. In some embodiments, the inner gear ring shaft includes a sleeve portion and a cover portion, and the sleeve portion is used to be sleeved on the sun gear shaft or the planetary carrier shaft of the planetary gear row. A number of first installation positions for installing the actuator can be set axially thereon, or a mounting position for setting the support bearing, and a second mounting position for setting the gear. The cover portion is connected to the inner gear ring of the planetary gear row in a transmission manner, and participates in the operation of the planetary gear row as a part of the planetary gear row. The inner hole profile and the outer profile of the cover portion can be used as the mounting position for setting the support bearing or the second mounting position for setting the gear. Therefore, by setting the inner gear ring shaft, the planetary gear transmission function, the actuator installation, the shift gear installation and the necessary axial limit function can be integrated at the same time, thereby greatly improving the integration of the electric drive system, reducing the functional volume of the electric drive, and making the electric drive system provided with the inner gear ring shaft have more flexible layout and loading performance.

The disclosed embodiment provides a highly integrated planetary gear input shaft assembly, which arranges and supports various systems through an inner ring gear shaft, effectively reducing the layout space of the assembly, reducing costs, making the structure more compact and more mountable, and making the product more competitive.

Although the preferred embodiments of the present disclosure have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present disclosure.

Obviously, those skilled in the art can make various changes and modifications to the present disclosure without departing from the spirit and scope of the present disclosure. Thus, if these modifications and variations of the present disclosure fall within the scope of the claims of the present disclosure and their equivalents, the present disclosure is also intended to include these modifications and variations.

Claims

An inner gear ring shaft is used to be sleeved outside the planetary gear and installed on the housing assembly through a support bearing. The inner gear ring shaft includes:

A shaft sleeve portion, used for sleeve-mounting on the sun gear shaft or the planet carrier shaft of the planetary gear, wherein the shaft sleeve portion is provided with at least one first mounting position for mounting an actuator; and

A cover portion, connected to the shaft sleeve portion and used for driving connection with the inner gear ring of the planetary gear;

Wherein, the cover portion and/or the shaft sleeve portion is provided with at least one assembly position for arranging the support bearing; the cover portion and/or the shaft sleeve portion is provided with at least one second installation position for arranging the gear.
The inner gear ring shaft according to claim 1, wherein: the cover portion includes a gear sleeve portion and a baffle portion, the inner ring of the baffle portion is connected to the shaft sleeve portion, and the outer ring is connected to the gear sleeve portion.
The inner gear ring shaft as described in claim 2, wherein: the gear sleeve portion and the inner gear ring are an integral structure or key-connected; the shaft sleeve portion, the baffle portion, and the gear sleeve portion are an integral structure.
The inner gear ring shaft as described in claim 3, wherein: the gear sleeve portion is connected to the inner gear ring via a spline; and the internal spline of the gear sleeve portion is provided with a retaining spring groove.
The inner gear ring shaft as described in claim 2, wherein: the gear sleeve portion and the shaft sleeve portion are both provided with the assembly position; the assembly position of the gear sleeve portion is the inner hole wall, and the assembly position of the shaft sleeve portion is provided with a shaft sleeve for mounting the support bearing.
The inner gear ring shaft according to claim 5, wherein: a limiting structure for axially limiting the support bearing is provided between the assembly position of the gear sleeve portion and the mounting position of the inner gear ring.
The inner gear ring shaft as described in claim 2, wherein: the gear sleeve portion and the shaft sleeve portion are both provided with the second mounting position; the second mounting position is provided with a limiting structure for axially limiting the gear or the bearing of the gear.
The inner gear ring shaft according to claim 1, wherein: the first mounting position is a key connection structure; and a limiting structure for axially limiting the actuator is provided on the first mounting position.
The inner gear ring shaft according to any one of claims 1-8, wherein: two of the first mounting position, the assembly position, and the second mounting position are each provided; the two first mounting positions are distributed at both ends of the shaft sleeve portion; the two assembly positions and the two second mounting positions are respectively provided on the shaft sleeve portion and the cover portion.
The inner gear ring shaft according to any one of claims 1 to 8, wherein: the shaft sleeve portion and/or the cover portion is provided with at least one oil guide hole penetrating the sleeve wall of the shaft sleeve portion; and the outer surface of the shaft sleeve portion is provided with an oil guide groove connected to the oil guide hole.
An input shaft assembly, comprising: a planetary gear row for connecting to an engine, at least one actuator, at least one supporting bearing, at least one gear and an inner gear ring shaft according to any one of claims 1 to 10; the inner gear ring shaft is sleeved on the sun gear shaft or the planetary carrier shaft of the planetary gear row, and the cover portion of the inner gear ring shaft is transmission-connected to the inner gear ring of the planetary gear row; the at least one actuator is mounted on the at least one first mounting position; the at least one supporting bearing is arranged on the at least one assembly position; the at least one gear is arranged on the at least one second mounting position.
The input shaft assembly as described in claim 11, wherein: the at least one actuator includes a first actuator and a second actuator; the at least one support bearing includes a first support bearing and a second support bearing; and the at least one gear includes a first gear and a second gear.
The input shaft assembly as described in claim 12, wherein: the first actuator and the second actuator are distributed at both ends of the sleeve portion; the first support bearing is arranged in the inner hole of the cover portion, and the second support bearing is arranged between the first actuator and the second actuator through a sleeve; the first gear is loosely sleeved on the cover portion through a bearing, and the second gear is loosely sleeved on the sleeve portion through a bearing and is located between the first actuator and the second support bearing.
The input shaft assembly as described in claim 13, wherein: the first gear gear includes a ring gear portion and a connecting portion, the ring gear portion is loosely sleeved on the cover portion through a bearing, and the connecting portion is fixedly connected to the coupling tooth on one side of the first actuator; the gear hub of the first actuator is transmission-connected to the first mounting position; the coupling tooth on the other side of the first actuator is fixedly connected to the second gear gear, and the second gear gear is axially limited by the sleeve.
The input shaft assembly as described in claim 13, wherein: the gear hub of the second actuator is drivingly connected to the sun gear shaft of the planetary gear row, the coupling teeth on one side of the second actuator are drivingly connected to the shaft sleeve portion, and the coupling teeth on the other side of the second actuator are fixedly connected to the housing assembly.
The input shaft assembly according to any one of claims 11 to 15, wherein the sun gear shaft or the planetary carrier shaft of the planetary gear row is provided with a connecting structure for driving connection with the motor assembly.
The input shaft assembly as claimed in any one of claims 11 to 15, wherein: the planetary row is provided with a lubrication channel, the outlet of the lubrication channel faces the planetary wheel bearings of the planetary row; the sun gear shaft of the planetary row is provided with a first hollow cavity extending axially therethrough, the planetary carrier of the planetary row is provided with an oil collecting cavity, and the first hollow cavity, the oil collecting cavity and the lubrication channel are connected in sequence.
The input shaft assembly according to claim 17, wherein: the planet carrier comprises a planet carrier shaft, a connecting plate and a planetary gear shaft connected in sequence, the planet carrier shaft is provided with the oil collecting chamber and the first oil guide hole in communication, and the planetary gear shaft is provided with a second oil guide hole;

An oil guide piece is disposed on the outer side of the connecting plate; the first oil guide hole, the gap between the oil guide piece and the connecting plate, and the second oil guide hole are sequentially connected to form the lubrication channel.
The input shaft assembly as described in claim 17, wherein: a support bearing is installed between the sun gear shaft and the inner ring gear shaft; the sun gear shaft is provided with at least one fourth oil guide hole connected to the first hollow cavity, and an outlet of one of the fourth oil guide holes faces the support bearing.
The input shaft assembly as claimed in claim 17, wherein: the input shaft assembly further comprises an oil guide pipe, the oil guide pipe is installed through the first hollow cavity, and the end near the planetary gear extends into the oil collecting cavity.
The input shaft assembly as claimed in claim 20, wherein: the oil guide pipe is provided with a plurality of oil outlet holes spaced apart along the axial direction and/or radial direction of the oil guide pipe; the far planetary gear end of the oil guide pipe is provided with an oil outlet; the oil outlet is a U-shaped groove and/or a circular hole.
A hybrid electric drive assembly, comprising:

a housing assembly; and

The input shaft assembly according to any one of claims 11 to 21 is installed inside the housing assembly.
The hybrid electric drive assembly as described in claim 22 further includes a motor assembly connected to the housing assembly, and the rotor of the motor assembly is drivingly connected to the sun gear shaft of the planetary gear.
The hybrid electric drive assembly as described in claim 23, wherein: the housing assembly includes a right housing, a left housing and an end cover connected in sequence, the right housing and the left housing together form a shaft gear mounting cavity, and the left housing and the end cover together form a motor mounting cavity; the input shaft assembly is located in the shaft gear mounting cavity, and the motor assembly is located in the motor mounting cavity.
The hybrid electric drive assembly as described in claim 24, wherein: the left housing is provided with an intermediate plate, and the intermediate plate is equipped with a third support bearing for supporting the rotor of the motor assembly; and one of the engaging teeth of the actuator is fixedly connected to the intermediate plate.
The hybrid electric drive assembly as claimed in claim 23, wherein: the motor assembly includes a generator and a drive motor, and the rotor of the generator is drivingly connected to the sun gear shaft of the planetary gear.
The hybrid electric drive assembly as claimed in claim 26, wherein: a second hollow cavity is provided inside the rotor of the generator, and the second hollow cavity is connected to the first hollow cavity of the sun gear shaft of the planetary gear.
A vehicle, comprising the hybrid electric drive assembly according to any one of claims 22 to 27; or, comprising the input shaft assembly according to any one of claims 11 to 21; or, comprising the inner gear ring shaft according to any one of claims 1 to 10.