CN115875425B

CN115875425B - Internal gear ring shaft, input shaft assembly, hybrid electric drive assembly and vehicle

Info

Publication number: CN115875425B
Application number: CN202211306028.9A
Authority: CN
Inventors: 刘宏; 付丽; 雷君; 聂少文; 刘欢
Original assignee: Dongfeng Motor Group Co Ltd
Current assignee: Dongfeng Motor Group Co Ltd
Priority date: 2022-10-24
Filing date: 2022-10-24
Publication date: 2024-04-16
Anticipated expiration: 2042-10-24
Also published as: CN115875425A; WO2024087635A1

Abstract

The invention discloses an inner gear ring shaft, an input shaft assembly, a hybrid electric drive assembly and a vehicle, and solves the technical problem of low integration level of an electric drive system in the prior art. The inner gear ring shaft provided by the invention can be integrally sleeved outside a planetary gear row and used as a part of the planetary gear row, the inner gear ring shaft is arranged on the shell assembly through the support bearing, a plurality of installation positions of components can be arranged on the inner gear ring shaft, and the inner gear ring shaft is in transmission connection with the inner gear ring of the planetary gear row and takes part in the operation of the planetary gear row as a part of the planetary gear row. Therefore, through the arrangement of the inner gear ring shaft, the planetary gear transmission function, the execution mechanism installation, the gear shifting gear installation and the necessary axial limiting function can be integrated at the same time, so that the integration level of the electric driving system is greatly improved, the functional volume of the electric driving system is reduced, and the electric driving system with the inner gear ring shaft has more flexible arrangement and carrying performance.

Description

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

Technical Field

The application belongs to the technical field of planetary gear sets, and particularly relates to an inner gear ring shaft, an input shaft assembly, a hybrid electric drive assembly and a vehicle.

Background

With the development of an electric drive system, the integration of the components and parts gradually becomes a great trend, and the high integration can reduce the weight of the components and parts, reduce the cost, reduce the load of the whole vehicle and enhance the carrying performance of the electric drive assembly. In addition to high integration, compact structural arrangements are an important dimension for the hybrid system of the load to reduce its volume and enhance its mountability.

Related researches on hybrid electric drive assemblies in the prior art are focused on angles such as a power split transmission architecture, a power split mode and the like, for example, the invention applies for a serial double-motor differential power split stepless speed change transmission system (publication number is CN 110303865A) and discloses a power split transmission architecture. Whereas studies on high integration and low functional volume of hybrid electric drive are rarely documented.

Disclosure of Invention

In order to solve the technical problems, the invention provides an inner gear ring shaft, an input shaft assembly, a hybrid electric drive assembly and a vehicle, wherein the inner gear ring shaft is arranged to highly integrate a plurality of systems, so that the functional volume of electric drive is reduced, and the arrangement and carrying performance are more flexible.

The technical scheme adopted for achieving the purpose of the invention is that the inner gear ring shaft is sleeved outside the planetary gear set and is arranged on the shell assembly through the support bearing; the internal gear ring shaft includes:

The shaft sleeve part is sleeved on a sun gear shaft or a planet carrier shaft of the planet row, and is provided with at least one first installation position for installing an executing mechanism;

the cover part is connected with the shaft sleeve part and is used for being in transmission connection with the inner gear ring of the planet row;

wherein the cover part and/or the sleeve part is provided with at least one assembly position for arranging the support bearing; the cover part and/or the sleeve part is provided with at least one second mounting position for setting the gear.

In some embodiments, the cover portion includes a toothed sleeve portion and a baffle portion, an inner ring of the baffle portion connecting the sleeve portion and an outer ring connecting the toothed sleeve portion.

In certain embodiments, the tooth sleeve portion is in a unitary structure or keyed connection with the ring gear; the shaft sleeve part, the baffle plate part and the tooth sleeve part are of an integrated structure.

In certain embodiments, the tooth sleeve portion is splined to the ring gear; and the internal spline of the tooth sleeve part is provided with a clamp spring groove.

In certain embodiments, the tooth sleeve portion and the sleeve portion are both provided with the mounting locations; the assembly position of the tooth sleeve part is an inner hole wall, and the assembly position of the shaft sleeve part is provided with a shaft sleeve for installing the support bearing.

In some embodiments, a limiting structure for axially limiting the support bearing is arranged between the assembly position of the tooth sleeve part and the installation position of the inner gear ring.

In certain embodiments, the tooth sleeve portion and the sleeve portion are each provided with the second mounting location; the second installation position is provided with a limiting structure for limiting the gear or the bearing of the gear axially.

In certain embodiments, the first mounting location is a keyed connection; and a limiting structure for axially limiting the actuating mechanism is arranged on the first mounting position.

In some embodiments, the first mounting location, the mounting location, and the second mounting location are each provided with two; the two first installation positions are distributed at two ends of the shaft sleeve part; the two fitting bits and the two second mounting bits are respectively provided on the boss portion and the cover portion.

In some embodiments, at least one oil guide hole penetrating through the sleeve wall of the sleeve part is formed in the sleeve part and/or the cover part; the outer surface of the shaft sleeve part is provided with an oil guide groove communicated with the oil guide hole.

Based on the same inventive concept, the present application also provides an input shaft assembly including: a planetary gear set for connecting 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 gear ring is sleeved on a sun gear shaft or a planet carrier shaft of the planet row, and the cover part of the inner gear ring shaft is in transmission connection with the inner gear ring of the planet row; the at least one actuator is mounted on the at least one first mounting location; the at least one support bearing is arranged on the at least one assembly; the at least one gear is disposed on the at least one second mounting location.

In certain embodiments, the at least one actuator comprises a first actuator and a second actuator; the at least one support bearing includes a first support bearing and a second support bearing; the at least one gear includes a first gear and a second gear.

In certain embodiments, the first actuator and the second actuator are distributed at both ends of the boss; the first support bearing is arranged in the inner hole of the cover part, and the second support bearing is arranged between the first executing mechanism and the second executing mechanism through a shaft sleeve; the first gear is sleeved on the cover part through a bearing, and the second gear is sleeved on the shaft sleeve part through a bearing and is positioned between the first executing mechanism and the second supporting bearing.

In some embodiments, the first gear comprises a gear ring part and a connecting part, the gear ring part is sleeved on the cover part through a bearing, and the connecting part is fixedly connected with the combining teeth on one side of the first actuating mechanism; the gear hub of the first executing mechanism is in transmission connection with the first installation position; the combined teeth on the other side of the first executing mechanism are fixedly connected with the second gear, and the second gear is limited axially through the shaft sleeve.

In some embodiments, the gear hub of the second actuator is in driving connection with the sun gear shaft of the planetary row, the coupling teeth on one side of the second actuator are in driving connection with the shaft sleeve portion, and the coupling teeth on the other side of the second actuator are fixedly connected with the housing assembly.

In some embodiments, the sun gear shaft or the planet carrier shaft of the planet row is provided with a connection structure for driving connection with the motor assembly.

In certain embodiments, the planet row is provided with a lubrication channel, the outlet of which is directed towards the planet bearings of the planet row; the sun gear shaft of the planet row is provided with a first hollow cavity which is communicated in the axial direction, the planet carrier of the planet row is provided with an oil collecting cavity, and the first hollow cavity, the oil collecting cavity and the lubricating channel are sequentially communicated.

In some embodiments, the planet carrier comprises a planet carrier shaft, a connecting plate and a planet wheel shaft which are sequentially connected, wherein the planet carrier shaft is provided with the oil collecting cavity and the first oil guide hole which are communicated, and the planet wheel shaft is provided with the second oil guide hole;

An oil guide piece is arranged 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 communicated to form the lubrication channel.

In certain embodiments, a support bearing is mounted between the sun gear shaft and the inner gear shaft; the sun gear shaft is provided with at least one fourth oil guide hole communicated with the first hollow cavity, and the outlet of one fourth oil guide hole faces the support bearing.

In some embodiments, the input shaft assembly further comprises an oil conduit, wherein the oil conduit is installed in the first hollow cavity in a penetrating manner, and the proximal planet row end extends into the oil collecting cavity.

In some embodiments, the oil guide pipe is provided with a plurality of oil outlet holes which are distributed at intervals along the axial direction and/or the radial direction of the oil guide pipe; an oil outlet is arranged at the far planet row end of the oil guide pipe; the oil outlet is a U-shaped groove and/or a round hole.

Based on the same inventive concept, the present application also provides a hybrid electric drive assembly including:

A housing assembly;

The input shaft assembly is arranged in the shell assembly.

In certain embodiments, the hybrid electric drive assembly further comprises an electric motor assembly coupled to the housing assembly, a rotor of the electric motor assembly in driving communication with the sun gear shaft of the planetary row.

In some embodiments, the housing assembly comprises a right housing, a left housing and an end cover connected in sequence, wherein the right housing and the left housing enclose a shaft tooth mounting cavity, and the left housing and the end cover enclose a motor mounting cavity; the input shaft assembly is located in the shaft tooth mounting cavity, and the motor assembly is located in the motor mounting cavity.

In some embodiments, the left housing is provided with a middle plate, the middle plate being mounted with a third support bearing for supporting a rotor of the motor assembly; and the combining teeth of one actuating mechanism are fixedly connected with the middle plate.

In some embodiments, the motor assembly includes a generator and a drive motor, a rotor of the generator in driving connection with a sun gear shaft of the planetary row.

In some embodiments, a second hollow cavity is provided inside the rotor of the generator, the second hollow cavity being in communication with the first hollow cavity of the sun gear shaft of the planetary row.

Based on the same inventive concept, the present application also provides a vehicle, characterized in that: the hybrid electric drive assembly comprises the hybrid electric drive assembly; or an input shaft assembly as described above; or includes the above-described inner ring gear shaft.

According to the technical scheme, the inner ring gear shaft provided by the invention can be integrally sleeved outside the planet row and used as a part of the planet row, the inner ring gear shaft is mounted on the shell assembly through the support bearing, a plurality of mounting positions of components can be arranged on the inner ring gear shaft, the inner ring gear shaft comprises a shaft sleeve part and a cover part, the shaft sleeve part is sleeved on a sun gear shaft or a planet carrier shaft of the planet row, a plurality of first mounting positions for mounting an actuating mechanism or a plurality of second mounting positions for mounting the support bearing can be arranged on the shaft sleeve part along the axial direction, the cover part is in transmission connection with the inner ring gear of the planet row and takes part of the inner ring gear shaft as a part of the planet row to participate in running of the planet row, and the inner hole profile and the outer profile of the cover part can be used as the mounting positions for mounting the support bearing or the second mounting positions for mounting the gears. Therefore, through the arrangement of the inner gear ring shaft, the planetary gear transmission function, the execution mechanism installation, the gear shifting gear installation and the necessary axial limiting function can be integrated at the same time, so that the integration level of the electric driving system is greatly improved, the functional volume of electric driving is reduced, and the electric driving system provided with the inner gear ring shaft has more flexible arrangement and carrying performance.

The invention provides a highly integrated planetary gear input shaft assembly, which is characterized in that each system is arranged and supported through an inner gear ring shaft, so that the arrangement space of the assembly is effectively reduced, the cost is reduced, the structure is more compact, the carrying performance is better, and the product competitiveness is stronger.

Drawings

Fig. 1 is a schematic diagram of the structure of an inner ring gear shaft in embodiment 1 of the present invention.

Fig. 2 is a full cross-sectional view of the inner ring gear shaft of fig. 1.

Fig. 3 is a schematic structural diagram of an input shaft assembly in embodiment 2 of the present invention.

FIG. 4 is a schematic illustration of the internal lubrication passages of the input shaft assembly of FIG. 3.

Fig. 5 is an overall construction diagram of a hybrid electric drive assembly in embodiment 3 of the present application.

Fig. 6 is a schematic illustration of the hybrid electric drive assembly of fig. 5 with the end cap removed.

Fig. 7 is a schematic view of the hybrid electric drive assembly of fig. 5 with the right housing removed.

Reference numerals illustrate: 10-oil guide pipes, 11-oil outlet holes and 12-oil outlets; 20-an oil guide; 30-lining; 40-executing mechanism, 41-gear hub, 42-combined gear, S1-first executing mechanism, S2-second executing mechanism; 50-first gear, 51-gear ring, 52-connecting; 60-a second gear; 70-clamping springs; 80-shaft sleeve.

100-Planetary rows; 110-a sun gear shaft, 111-a first hollow cavity, 1111-an oil storage cavity, 1112-a reaming section, 112-a fourth oil guide hole and 113-a bearing mounting groove; 120-planetary carriers, 121-planetary carrier shafts, 122-connecting plates, 123-planetary wheel shafts, 124-oil collecting cavities, 1241-large hole sections, 1242-small hole sections, 125-first oil guide holes, 126-second oil guide holes, 1261-axial oil guide holes, 1262-radial oil guide holes and 127-third oil guide holes; 130-sun gear; 140-planetary gears; 150-an inner gear ring; 160-lubrication channels; 171-planetary gear bearing; 172-a first planet carrier bearing; 173-a second planet carrier bearing; 174—an intermediate bearing; 175-a first support bearing; 176-a second support bearing; 177 a-needle bearings for mounting the first gear, 177 b-needle bearings for mounting the inner ring gear, 177 c-needle bearings for mounting the second gear; 178-thrust bearings; 179-ball bearings.

200-An inner gear ring shaft and 201-an inner hole; 210-a boss; 220-cover part, 221-tooth sleeve part, 222-baffle part, 223-internal spline; 230-a first installation site; 240-assembling, 241-inner hole wall; 250-a second installation site; 260-a limit structure, 261-a clamp spring groove, 262-an end face, 263-a convex edge and 264-a hole shoulder; 270-an oil guide hole; 280-oil guiding groove.

1000-A hybrid electric drive assembly; 300-a housing assembly; 301-an oil inlet passage; 302-shaft tooth mounting cavity; 303-a motor mounting cavity; 310-right housing; 320-left shell, 321-middle plate; 330-end cap. 400-motor assembly, 401-generator, 402-drive motor; 410-rotor, 411-second hollow cavity; 500-a gear shifting mechanism assembly; 600-intermediate shaft tooth assembly; 700-differential assembly; 800-a controller assembly; 900-input shaft assembly.

Detailed Description

In order to make the present application more clearly understood by those skilled in the art, the following detailed description of the technical scheme of the present application will be given by way of specific examples with reference to the accompanying drawings.

Example 1:

The embodiment of the present invention provides an internal gear ring shaft 200, the internal gear ring shaft 200 as a whole may be sleeved outside the planetary gear row 100, and serve as a part of the planetary gear row 100, the internal gear ring shaft 200 is mounted on the housing assembly 300 through a support bearing, and a plurality of mounting positions of components may be provided thereon. Referring specifically to fig. 1 and 2, the internal gear ring shaft 200 includes a sleeve portion 210 and a cover portion 220, and the sleeve portion 210 is of a sleeve structure and can be fitted over a shaft, such as a sun gear shaft 110 or a carrier shaft 121 of the planetary gear set 100. The axial dimension of the boss 210 is longer, on which several first mounting locations 230 for mounting the actuator 40, or mounting locations 240 for supporting bearings, and second mounting locations 250 for gears, may be provided in the axial direction. The cover 220 is in driving connection with the ring gear 150 of the planetary gear set 100, and as a part of the planetary gear set 100 participates in the operation of the planetary gear set 100, both the inner bore profile and the outer profile of the cover 220 can be used as a mounting point 240 for the support bearing or a second mounting point 250 for the gear. Therefore, by arranging the inner gear ring shaft 200, the transmission function of the planet row 100, the installation of the actuating mechanism 40, the installation of the gear shifting gear and the necessary axial limiting function can be integrated at the same time, so that the integration level of the electric driving system is greatly provided, the functional volume of the electric driving system is reduced, and the electric driving system with the inner gear ring shaft 200 has more flexible arrangement and carrying performance.

The inner race shaft 200 may be of an integral structure, that is, the sleeve portion 210 and the cover portion 220 may be integrally formed by casting, machining, or the like. The ring gear shaft 200 may be of a separate type, and the sleeve portion 210 and the cover portion 220 may be fixedly connected by welding, adhesion, screwing, or the like. In this embodiment, the inner ring gear shaft 200 is a cast integral structure, and then the inner and outer profiles are machined, and the inner and outer profiles may be made of metal materials such as stainless steel and cast aluminum.

The cover 220 of the ring gear shaft 200 is covered on the main body of the planetary gear set 100, and the sun gear 130, the planet gears 140, and the ring gear 150 of the planetary gear set 100 are all located in the inner hole of the cover 220. Specifically, the cover portion 220 includes a tooth socket portion 221 and a baffle portion 222, and an inner ring of the baffle portion 222 is connected to the sleeve portion 210 and an outer ring is connected to the tooth socket portion 221. The tooth socket portion 221 has a similar structure to the shaft sleeve portion 210, and the tooth socket portion 221 is in driving connection with the ring gear 150 of the planetary gear set 100. The baffle portion 222 may be an annular flat plate, an annular spherical shell or a three-dimensional structure formed by a plurality of connecting rods, and the specific structural form of the baffle portion 222 is not limited by the present application. The sleeve portion 210, the baffle portion 222, and the tooth sleeve portion 221 may be integrally formed or fixedly coupled by welding, bonding, screwing, or the like. The gear sleeve portion 221 and the ring gear 150 may be of an integral structure or keyed to achieve a power transmission such that the entire ring gear shaft 200 can rotate together with the ring gear 150 of the planetary row 100.

Specifically, in this embodiment, the tooth sleeve portion 221 is connected with the ring gear 150 through a spline, the inner surface of the tooth sleeve portion 221 is provided with an inner spline 223, the inner surface of the ring gear 150 is a tooth meshed with the planet gear 140, the outer surface of the ring gear 150 is an outer spline, the ring gear 150 is axially clamped into the inner spline 223, one side of the ring gear 150 is axially limited through an end face 262 inside the baffle portion 222, the inner spline 223 of the tooth sleeve portion 221 is provided with a clamp spring groove 261, and after the clamp spring 70 is installed in the clamp spring groove 261, the clamp spring 70 can axially limit the other side of the ring gear 150. Thereby ensuring that the sleeve portion 221 and the ring gear 150 do not move axially relative to each other. And the snap spring 70 is a detachable structure, which does not affect the installation and detachment of the ring gear 150.

The plurality of member mounting positions on the inner ring gear shaft 200 mainly includes a first mounting position 230 for mounting the actuator 40, an assembling position 240 for providing a support bearing, and a second mounting position 250 for providing a gear. The actuator 40 may be a synchronizer or a clutch, and the actuator 40 may be a hollow sleeve on the inner ring gear shaft 200 or fixedly connected or in transmission connection with the inner ring gear shaft 200. The support bearing is used to mount the inner ring gear shaft 200 to the housing assembly 300. The gear may be a gear or a transmission gear which only plays a role in transmission, and the gear may be a hollow sleeve on the inner ring gear shaft 200 or fixedly connected or in transmission connection with the inner ring gear shaft 200. In other embodiments, other component mounting positions, such as a component mounting position for mounting an oil deflector, a component mounting position for setting a sensor, and the like, may also be provided as appropriate to the inner ring gear shaft 200.

In the above-mentioned component mounting positions, the first mounting positions 230 are all disposed on the sleeve portion 210, mainly because the actuator 40 needs a certain axial space for operation, and the sleeve portion 210 has a larger axial dimension than the cover portion 220, so that the axial space required for the actuator 40 to operate can be satisfied; on the other hand, the sleeve portion 210 is sleeved on the sun gear shaft 110 or the planet carrier shaft 121 of the planet row 100, the cover portion 220 is sleeved on the sun gear 130, the planet gears 140 and the inner gear ring 150 of the planet row 100, and the sleeve portion 210 is smaller than the cover portion 220 in radial dimension, so that the actuator 40 is convenient to arrange.

In the present embodiment, the actuator 40 is used to change the transmission ratio of the planetary gear set 100, such as to joint the ring gear 150 of the planetary gear set 100 with the sun gear shaft 110 for rotation, joint the ring gear 150 with the planet carrier for rotation, joint the planet carrier with the sun gear shaft 110 for rotation, lock the ring gear 150, lock the sun gear 130, lock the planet gears 140, and so on. In this embodiment, the first mounting position 230 is a key connection structure, so that the actuator 40 is in driving connection with the ring gear shaft 200, and since the ring gear shaft 200 is in driving connection with the ring gear 150 of the planet row 100, the actuator 40 can change the movement condition of the ring gear 150, for example, to engage the ring gear 150 with the sun gear shaft 110 or the planet carrier, or to lock the ring gear 150.

The first mounting position 230 is provided with a limiting structure 260 for axially limiting the actuator 40, so as to prevent relative axial rotation between the actuator 40 and the ring gear shaft 200. In particular, in the present embodiment, the actuator 40 is in spline connection with the inner ring gear shaft 200, that is, the key connection structure of the first mounting position 230 adopts external splines, and the inner ring of the gear hub 41 and/or the coupling teeth 42 of the actuator 40 is provided with internal splines. For spline connection, the actuating mechanism 40 and the inner gear ring shaft 200 are limited by adopting a clamp spring 70, the corresponding limiting structure 260 is a clamp spring groove 261 arranged on an external spline, and the clamp spring 70 is clamped in the clamp spring groove 261 after the gear hub 41 and/or the combining teeth 42 of the actuating mechanism 40 are/is installed in place.

With respect to the mounting location 240 for the support bearing and the second mounting location 250 for the gear, the support bearing and the gear work in a rotational manner without axial movement and thus may be provided on the cap portion 220 and/or the collar portion 210 as desired. Typically, at least two bearings are required for mounting and fixing a shaft, so that the number of mounting locations 240 is also two or more, and the two or more mounting locations 240 are axially spaced apart, i.e. the tooth socket portion 221 and the shaft socket portion 210 are each provided with mounting locations 240. Specifically, the assembly position 240 of the cover portion 220 is an inner hole wall 241 of the tooth sleeve portion 221, the assembly position 240 of the shaft sleeve portion 210 is a polish rod segment, and the support bearing is in interference fit with the inner hole wall 241 and the polish rod segment. A limiting structure 260 for axially limiting the corresponding support bearing is arranged between the assembly position 240 of the tooth sleeve part 221 and the installation position of the inner gear ring 150, and the limiting structure 260 can adopt end face limiting (such as shaft shoulder limiting and boss limiting) or clamp spring limiting. Referring to fig. 2, in this embodiment, a hole shoulder is formed between the inner hole wall 241 of the tooth sleeve portion 221 and the inner spline 223, and the support bearing mounted on the inner hole wall 241 is axially limited by the hole shoulder.

In some embodiments, the assembling position 240 of the shaft sleeve portion 210 is provided with the shaft sleeve 80, so that on one hand, the diameter difference between the support bearing and the polish rod section can be compensated, on the other hand, the shaft sleeve 80 and the corresponding polish rod section can be used for axial limiting of surrounding structural members, and on the other hand, the support bearing is in interference press fit with the shaft sleeve 80. When the sleeve 80 is used for axial limiting of surrounding structural members, the surrounding structural members also play a role in axial limiting of the sleeve 80.

In the present embodiment, the inner ring gear shaft 200 is suitable for use in a planetary transmission having gears, for example, a four-speed transmission requiring at least two actuators 40 and at least two gears. Taking a hybrid power drive system (publication number CN113232501 a) as an example, the hybrid power drive system realizes four gears of an engine through two synchronizers and two gear gears, and the two synchronizers and the two gear gears are respectively recorded as: the first actuator S1, the second actuator S2, the first gear 50 and the second gear 60. The first executing mechanism S1 and the second executing mechanism S2 are synchronizers, the first gear 50 is a large gear ring, and three gears and four gears of the engine are realized; the second gear 60 is a small ring gear, which achieves first gear and second gear of the engine.

The first gear 50 and the second gear 60 are mounted on two second mounting positions 250, respectively, and since the first gear 50 and the second gear 60 are both sleeved on the inner ring gear shaft 200, bearings, such as ball bearings, are mounted in the inner holes of the first gear 50 and the second gear 60, as shown in fig. 3. In other embodiments, no bearings are required if the gears are in driving connection with the inner ring gear shaft 200. In order to reduce the axial length of the inner ring gear shaft 200, the tooth sleeve portion 221 and the sleeve portion 210 are each provided with a second mounting position 250, i.e., the first gear 50 is idly sleeved on the tooth sleeve portion 221 through a bearing, and the second gear 60 is idly sleeved on the sleeve portion 210 through a bearing.

The second mounting location 250 of the inner gear ring shaft 200 is provided with a limiting structure 260 for limiting the gear or the bearing axial direction of the gear, and the limiting structure 260 may be a limiting boss, a limiting step or a groove for mounting the snap spring 70. If the limiting structure 260 is used for axially limiting the bearing, a limiting boss, a limiting step and a limiting end face of the structure are generally selected for limiting; if the limiting structure 260 is used to axially limit the gear, which is in driving connection with the ring gear shaft 200, such as a spline connection, the circlip 70 is typically selected for axial limiting.

In the design of the limiting structure 260, in order to facilitate the installation of the structural components such as the actuator 40, the gear, the bearing, etc., in this embodiment, the outer surface of the sleeve portion 210 is designed as a stepped shaft, specifically, from the far planet row end to the near planet row end, the outer diameter of the sleeve portion 210 tends to increase, and each structural component is sleeved on the sleeve portion 210 one by one. The stepped shaft may form several limiting steps for axial positioning, and the stepped shaft has several raised edges 263 for limiting the shaft sleeve 80, bearing, etc.

In the present embodiment, the internal gear ring shaft 200 is applied to a planetary transmission having four gears, and therefore, the first mounting position 230, the fitting position 240, and the second mounting position 250 are each provided with two. In order to ensure that the two actuators 40 mounted on the two first mounting locations 230 have sufficient axial toggle space, the two first mounting locations 230 are distributed at two ends of the sleeve portion 210, it should be noted that the first mounting locations 230 may be used for mounting all components of the actuators 40, or may be used for mounting only part of the components of the actuators 40, for example, only the gear hubs 41 of the synchronizers or the single-sided coupling teeth 42. In order to reduce the axial dimension of the internal gear ring shaft 200 and improve the mounting performance of the hybrid transmission provided with the internal gear ring shaft 200, in the present embodiment, two mounting pieces 240 and two second mounting pieces 250 are provided on the boss portion 210 and the cover portion 220, respectively.

Since the inner ring gear shaft 200 of the present embodiment needs to be provided with a plurality of bearings and gears, and lubrication requirements of the plurality of bearings and gears need to be guaranteed, particularly, splash lubrication or active lubrication may be adopted, and since the arrangement of the bearings and gears of the inner ring gear shaft 200 is compact, axial limiting effects are formed, it is difficult to achieve the expected lubrication effect only by the lubricant that splashes outside, and therefore, the present embodiment adopts the active lubrication scheme.

Specifically, at least one oil guiding hole 270 penetrating through the sleeve wall of the sleeve portion 210 is disposed on the sleeve portion 210, and a plurality of oil guiding holes 270 are generally disposed along the circumferential direction, and a plurality of oil guiding holes 270 disposed on the same cross section are grouped, so that a plurality of groups of oil guiding holes 270 may be disposed on the sleeve portion 210 along the axial direction thereof. In this embodiment, the outer surface of the sleeve portion 210 is provided with oil guiding grooves 280 communicated with the oil guiding holes 270, the oil guiding grooves 280 are communicated with a group of oil guiding holes 270, and the specific number of the oil guiding grooves 280 is determined according to actual needs. The oil guiding groove 280 is a concave groove, and the lubricating oil flowing out of the oil guiding hole 270 can be uniformly distributed along the circumferential direction by arranging the oil guiding groove 280, in addition, the groove can be used as a tool retracting groove during the external surface machining of the inner gear ring shaft 200 due to the fact that the oil guiding groove 280 is a groove.

Additionally, in some embodiments, oil guide holes 270 may also be provided in the sleeve portion 220, and the oil guide holes 270 may optionally be provided in the tooth sleeve portion 221 and/or the baffle portion 222 to facilitate the ingress and egress of oil into the inner bore of the cap portion 220. Referring to fig. 2, in this embodiment, a plurality of oil guiding holes 270 may be provided on the baffle plate portion 222, and the oil guiding holes 270 are configured to incline outwards along the splashing direction, so that the splashed lubricating oil is thrown out of the oil guiding holes 270 when the planet row 100 rotates, and lubricates structural members outside the inner ring gear shaft 200.

Example 2:

Based on the same inventive concept, the present embodiment provides an input shaft assembly 900, and the input shaft assembly 900 may be applied to a hybrid electric drive assembly or a general transmission, and the input shaft assembly 900 is connected to an output shaft of an engine. Referring specifically to fig. 3 and 4, the input shaft assembly 900 includes the planetary row 100, at least one actuator 40, at least one support bearing, at least one gear, and the inner ring gear shaft 200 of embodiment 1 described above. The at least one actuator 40 of the input shaft assembly 900 is mounted on the at least one first mounting location 230 of the inner ring gear shaft 200; at least one support bearing of the input shaft assembly 900 is provided on at least one fitting bit 240 of the inner ring gear shaft 200; at least one gear of the input shaft assembly 900 is disposed on at least one second mounting location 250 of the inner ring gear shaft 200. That is, the number of the first mounting locations 230, the fitting locations 240, and the second mounting locations 250 of the ring gear shaft 200 matches the number of the actuators 40, the support bearings, and the gears to be mounted. Typically, a shaft requires two support bearings to mount the support; the number of actuators 40 is positively correlated with the gear design, e.g. one actuator 40 implements two gears; the number of gears is related to the transmission design, and the gears can be specifically matched with the actuating mechanism 40 to realize gear shifting, or can be matched with other gears as transmission gears to realize speed ratio adjustment.

The input shaft assembly 900 is high in integration and small in axial dimension since the actuator 40, the planetary row 100, and the gears are integrated at the same time, and the above structures are integrated by the ring gear shaft 200. The inner space of the inner gear ring shaft 200 is provided with the planetary row 100, the outer space is provided with the actuating mechanism 40, the bearing and the gear, so that the input shaft assembly 900 can be used as an independent supply set to be assembled with the shell during assembly, and the assembly difficulty is reduced.

In this embodiment, the input shaft assembly 900 is a single row 100 variator subassembly that can achieve four engine gears. The two actuators 40 are respectively a first actuator S1 and a second actuator S2, and the first actuator S1 and the second actuator S2 may adopt a synchronizer (single-sided or double-sided) or a clutch as required. The two support bearings are also provided, namely a first support bearing 175 and a second support bearing 176, and the first support bearing 175 and the second support bearing 176 can be ball bearings, needle bearings, thrust bearings and the like, and the ball bearings are adopted in the embodiment. The same gear sets up two, is first gear 50 and second gear 60 respectively, and first gear 50 and second gear 60 all cooperate with actuating mechanism 40, realize shifting.

Specifically, the first actuator S1 and the second actuator S2 are distributed at two ends of the boss 210. The first actuator S1/second actuator S2 may be provided to selectively connect the sun gear shaft 110 with the inner ring gear shaft 200, to selectively connect the carrier shaft 121 with the inner ring gear shaft 200, to selectively connect the inner ring gear shaft 200 with the first gear 50, or to selectively connect the inner ring gear shaft 200 with the second gear 60, according to actual needs. In this embodiment, the first actuator S1 adopts a synchronizer, which has a gear hub 41 and two engaging teeth 42 on two sides, and the gear hub 41 of the first actuator S1 is in transmission connection with the first mounting position 230; the combining tooth 42 on one side of the first actuating mechanism S1 is fixedly connected with the first gear wheel 50; the coupling tooth 42 on the other side of the first actuator S1 is fixedly connected to the second gear 60, and the first actuator S1 is used to connect the inner ring gear shaft 200 optionally to the first gear 50 or the second gear 60. The second actuator S2 is also a synchronizer, and has a gear hub 41 and coupling teeth 42 on two sides, the gear hub 41 of the second actuator S2 is in transmission connection with the sun gear shaft 110 of the planetary gear set 100, the coupling teeth 42 on one side of the second actuator S2 are in transmission connection with the shaft sleeve portion 210, the coupling teeth 42 on the other side of the second actuator S2 are fixedly connected with the housing assembly 300, and the second actuator S2 is used for connecting the sun gear shaft 110 with the inner gear shaft 200 or the housing assembly 300 optionally, so as to realize different speed ratio outputs of the planetary gear set 100. In order to increase the axial load capacity of the input shaft assembly 900, a thrust bearing is disposed 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.

Specifically, 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, the second support bearing 176 is disposed between the first actuator S1 and the second actuator S2 through the sleeve 80, and the first support bearing 175 and the second support bearing 176 mainly function to support the inner ring gear shaft 200, and therefore, ball bearings may be employed. The first support bearing 175 is axially limited by the end face 262 of the first mounting position 230, namely, a hole shoulder 264 formed by the first mounting position 230 and the support position of the cover part 220; the second support bearing 176 is axially retained by a boss provided 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.

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

In this embodiment, the first gear 50 is a large gear ring, and the first gear 50 is required to meet both the diameter requirement that the first gear can be sleeved on the cover 220 and the connection requirement that the first gear is connected to the first actuator S1 mounted on the shaft sleeve 210, so that the first gear 50 specifically includes a gear ring portion 51 and a connection portion 52, the gear ring portion 51 is similar to the gear sleeve portion 221 of the inner gear ring shaft 200 in structure, the connection portion 52 is similar to the baffle portion 222 of the inner gear ring shaft 200 in structure, and the structure is an annular plate structure. The ring gear portion 51 and the connecting portion 52 may be an integrally formed structure or may be fixedly connected by welding, threaded fasteners. The ring gear portion 51 is sleeved on the cover portion 220 through a needle bearing 177a, and the bearing is limited axially through a convex edge 263 arranged on the outer surface of the cover portion 220. The connecting portion 52 is fixedly connected with the engaging tooth 42 on one side of the first actuator S1, and the connecting portion 52 and the engaging tooth 42 of the first actuator S1 may be integrally formed, welded, or in transmission connection. The second gear 60 is fixedly connected with 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 may be integrally formed, welded, or in transmission connection. The second gear 60 is axially restrained by the sleeve 80 of the second support bearing 176.

To further increase the axial load capacity of the input shaft assembly 900, as shown in FIG. 3, a thrust bearing 178 is disposed between the connecting portion 52 and the cover portion 220, and more particularly, the thrust bearing 178 is disposed between the connecting portion 52 and the baffle portion 222. That is, the first gear 50 is fitted over the inner race shaft 200 via the needle bearing 177a and the thrust bearing 178, and is axially restrained by the thrust bearing 178 and the end face 262 outside the baffle plate portion 222. The cover portion 220 of the inner ring gear shaft 200 is provided with oil guide holes 270 penetrating through the wall thickness so that the lubricating oil splashed in the planetary gear set 100 can enter the gap between the first gear 50 and the cover portion 220 through the oil guide holes 270 on the cover portion 220, lubricating the needle bearings 177a and the thrust bearings 178 therein.

Referring to fig. 3, in the input shaft assembly 900, the sun gear shaft 110 or the planet carrier shaft 121 of the planet row 100 is connected to the engine to realize power input of the engine, the inner gear ring shaft 200 is sleeved on the planet carrier shaft 121 or the sun gear shaft 110 of the planet row 100 for output, for example, when the planet row 100 adopts the sun gear shaft 110 for input, the inner gear ring shaft 200 and the planet carrier shaft 121 serve as output, and the inner gear ring shaft 200 is correspondingly sleeved on the planet carrier shaft 121. When the carrier shaft 121 is used as the input of the planetary gear set 100, the inner ring gear shaft 200 and the sun gear shaft 110 are used as the output, and the inner ring gear shaft 200 is fitted around the sun gear shaft 110. The cover portion 220 of the ring gear shaft 200 is in driving connection with the ring gear 150 of the planetary gear set 100, and specifically may be integrally formed, welded or keyed. The inner ring gear shaft 200, the carrier shaft 121, and the sun gear shaft 110 need to rotate during operation, and in some conditions, there is a difference in rotational speed, so it is necessary to install a bearing between the inner ring gear shaft 200 and the sun gear shaft 110 or the carrier shaft 121, the inner ring of the bearing is sleeved on the sun gear shaft 110 or the carrier shaft 121, and the inner ring gear shaft 200 is sleeved on the outer ring of the bearing. In the present embodiment, the inner ring gear shaft 200 is fitted over the sun gear shaft 110 via two needle bearings 177 b.

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 planet carrier shaft 121 of the planet row 100 of the input shaft assembly 900 is connected with the motor assembly 400, for example, the planet row 100 adopts the input of the planet carrier shaft 121, the inner gear ring shaft 200 and the sun gear shaft 110 as outputs, the inner gear ring shaft 200 is sleeved on the sun gear shaft 110, and the sun gear shaft 110 is provided with a connecting structure for driving connection with the motor assembly 400; when the sun gear shaft 110 is input to the planetary gear set 100 and the inner gear shaft 200 and the carrier shaft 121 are output, the inner gear shaft 200 is provided with a connection structure for driving connection with the motor assembly 400. In the present embodiment, the planetary gear set 100 of the input shaft assembly 900 adopts a technical scheme that a planet carrier shaft 121 is input, an inner gear ring shaft 200 and a sun gear shaft 110 are taken as outputs, and the inner gear ring shaft 200 is sleeved on the sun gear shaft 110.

The planet row 100 is a main part for power split, lubrication of the planet row 100 is an important condition for ensuring normal operation of the input shaft assembly 900, and the main lubrication requirement of the planet row 100 is that the planet bearings 171 are arranged in a large number and widely distributed manner, on one hand, the planet bearings 171 are arranged in an area surrounded by the planet carrier 120 and between the planet 140 and the planet axle 123, so that the planet bearings 171 are blocked by the planet 140 and the planet carrier 120, lubricating oil is difficult to enter the installation place of the planet bearings 171, and therefore, the planet bearings 171 are easy to ablate and affect the use of the whole planet row 100.

In order to improve lubrication of the planet row 100, referring to fig. 4, in this embodiment, the planet row 100 is provided with a lubrication channel 160, the sun gear shaft 110 of the planet row 100 is provided with a first hollow cavity 111 penetrating along an axial direction, and the sun gear shaft 110 may be integrally formed with the sun gear 130 of the planet row 100, or may be in a keyed connection, in this embodiment, the sun gear shaft 110 is integrally formed with the sun gear 130. The planet carrier 120 of the planet row 100 is provided with an oil collecting chamber 124, the first hollow chamber 111, the oil collecting chamber 124 and the lubrication channel 160 are communicated in sequence, and the outlet of the lubrication channel 160 is directed to the planet wheel bearing 171 of the planet row 100. In order to facilitate lubrication of the structure outside the sun gear shaft 110, the sun gear shaft 110 is provided with a plurality of fourth oil guiding holes 112 communicated with the first hollow cavity 111, wherein the outlet of one fourth oil guiding hole 112 faces to the bearing between the sun gear shaft 110 and the inner gear shaft 200.

Specifically, the lubrication channel 160 of the planet carrier 120 may be an oil channel formed in the base material of the planet carrier 120, or may be an oil channel formed by surrounding external elements, so long as the installation place capable of sending lubricating oil into the planet wheel bearing 171 is satisfied. In this embodiment, the planetary gear bearing 171 is a needle bearing, and may specifically be a full needle bearing or a steel cage needle bearing. The planetary gear bearing 171 adopts a double-row needle bearing, a gasket is arranged in the middle of the planetary gear bearing, and the gasket forms a gap with the planetary gear shaft 123 in the radial direction, so that lubricating oil can enter the needle bearing to lubricate the roller surface of the needle bearing.

Referring to fig. 4, in the present embodiment, the planet carrier 120 includes a planet carrier shaft 121, a connecting plate 122 and a plurality of planet wheel shafts 123 sequentially connected, the planet wheel 140 is sleeved on the planet wheel shaft 123, a planet wheel bearing 171 is installed between the planet wheel 140 and the planet wheel shafts 123, and two sides of the planet wheel 140 are respectively meshed with the gear of the sun wheel 130 and the gear of the ring gear 150 through gears. The carrier shaft 121 is located at the center of the connection plate 122, and the planetary wheel shafts 123 are uniformly distributed in the circumferential direction around the carrier shaft 121. The planet carrier shaft 121 and the connecting plate 122 may be detachably connected through a threaded fastener, a fastening structure, or the like, or may be welded and fixed, or the planet carrier shaft 121 and the connecting plate 122 are in an integral structure, in this embodiment, the planet carrier shaft 121 is press-fitted on the connecting plate 122 through interference. The connection plate 122 and the planetary axle 123 may be detachably connected by a threaded fastener, a snap structure, or the like, or may be welded and fixed, or the connection plate 122 and the planetary axle 123 may be integrally formed, which is not limited by the present application. The overall external shape, profile of the carrier 120 is also not limiting of the application, for example, the carrier 120 may take the form of a cage.

Specifically, the planet carrier shaft 121 is provided with an oil collecting cavity 124 and a first oil guiding hole 125 which are communicated, and the oil collecting cavity 124 is located at the center of the planet carrier shaft 121, and is preferably coaxial with the planet carrier shaft 121. The planetary axle 123 is provided with a second oil guide hole 126, and an outlet of the second oil guide hole 126 faces the planetary gear bearings 171 of the planetary row 100. The oil guide 20 is arranged outside the connecting plate 122, and the first oil guide hole 125, the gap between the oil guide 20 and the connecting plate 122 and the second oil guide hole 126 are sequentially communicated to form a lubrication channel 160. The oil guide 20 guides the lubricating oil, which is thrown out of the first oil guide hole 125 by centrifugal action in the oil collecting chamber 124, to the second oil guide hole 126.

In this embodiment, an intermediate bearing 174 is disposed between the planet carrier shaft 121 and the sun gear shaft 110, where the intermediate bearing 174 adopts a thrust bearing, so that a larger axial force can be borne by the intermediate bearing 174, one end of the sun gear shaft 110 abuts against the planet carrier shaft 121 through the thrust bearing, and the thrust bearing can meet the working requirement that a rotation speed difference exists between the planet carrier 120 and the sun gear shaft 110 under certain working conditions of the planet row 100. The intermediate bearing 174 is specifically located at the end of the sun gear shaft 110, and in some embodiments, a concave bearing mounting groove 113 may be provided at the end of the sun gear shaft 110, the bearing mounting groove 113 being in communication with the first hollow cavity 111, thereby allowing the internal void of the intermediate bearing 174 to communicate with the first hollow cavity 111, and the lubrication oil in the first hollow cavity 111 to enter the intermediate bearing 174.

The second oil guiding hole 126 may be a channel extending along the radial direction and/or the axial direction of the planetary axle 123, or may be a channel extending along the circumferential direction of the planetary axle 123, that is, the second oil guiding hole 126 may be an axial straight channel, a radial straight channel, an oblique straight channel, a curved channel, etc., which is not limited by the present application. Specifically, in the present embodiment, the second oil guiding hole 126 includes an axial oil guiding hole 1261 extending along the axial direction of the planetary axle 123 and at least one radial oil guiding hole 1262 extending along the radial direction of the planetary axle 123, and the outlet of the radial oil guiding hole 1262 forms the outlet of the lubrication channel 160. The number of radial oil guiding holes 1262 is determined according to the size of the planet wheel bearing 171, and more than two radial oil guiding holes 1262 are generally arranged, and the outlets of the more than two radial oil guiding holes 1262 are spaced and uniformly distributed along the circumferential surface of the planet wheel shaft 123, for example, the second oil guiding hole 126 comprises an axial oil guiding hole 1261 extending along the axial direction of the planet wheel shaft 123 and four radial oil guiding holes 1262 extending along the radial direction of the planet wheel shaft 123, and the four radial oil guiding holes 1262 are distributed at 90 degrees with each other, so that oil products can reach the planet wheel bearing 171, and the whole planet row 100 is prevented from being sintered due to insufficient lubrication of the planet wheel bearing 171. In some embodiments, the inlet of the axial oil guide hole 1261 is provided as a flare, preferably a round flare, which reduces the flow resistance. The diameter of the flared hole gradually increases from the middle to the end in the axial direction of the planetary wheel shaft 123, facilitating the entry of lubricating oil into the axial oil guide hole 1261.

In certain embodiments, the planet carrier 120 has a first planet carrier bearing 172 mounted thereon, the first planet carrier bearing 172 disposed in the lubrication channel 160, the interior space of the first planet carrier bearing 172 in communication with the lubrication channel 160 for lubrication. Referring to fig. 3 and 4, the first planet carrier bearing 172 is mounted on the planet carrier shaft 121 and adjacent to the web 122 of the planet carrier 120, the first planet carrier bearing 172 is a thrust bearing, the loose ring of which is in contact with the web 122, and the tight ring of which is connected and/or in contact with an external stationary member (e.g., the housing assembly 300 for mounting the planet carrier 100) to axially stabilize the planet carrier. A channel for lubricating oil to circulate is formed between the loose ring and the tight ring, and the lubricating oil can lubricate the roller of the thrust bearing when the lubricating oil circulates between the loose ring and the tight ring. Of course, in other embodiments, the first carrier bearing 172 may be disposed at other locations of the carrier 120, completely separated from the lubrication channel 160, to avoid the flow resistance generated by the internal structure of the first carrier bearing 172.

In some embodiments, to improve rotational stability of the planet carrier 120, a second planet carrier bearing 173 is also mounted on the planet carrier shaft 121, and the second planet carrier bearing 173 employs a needle bearing, for example, such that the planet carrier 120 is mounted in the housing assembly 300 (specifically, the right housing 310) via the second planet carrier bearing 173. The second planet carrier bearing 173 also requires lubrication during operation, for which purpose the planet carrier shaft 121 is provided with a third oil guide hole 127 communicating with the oil collecting chamber 124, the outlet of the third oil guide hole 127 being directed towards the second planet carrier bearing 173. In general, oil collection chamber 124 is required to be able to receive the proximal planet row 100 end of oil conduit 10 and to store a quantity of oil for delivery to third oil transfer orifice 127. Considering that less lubrication oil is required for the second planet carrier bearing 173 than for the planet carrier bearing 171, in order to ensure that the oil is sufficiently supplied to the planet carrier bearing 171, in some embodiments, the oil collecting chamber 124 has a stepped hole structure, and a large hole section 1241 of the oil collecting chamber is used for accommodating the near planet row 100 end of the oil guide pipe 10, and a small hole section 1242 is communicated with the third oil guide hole 127.

Due to axial manufacturing and machining errors of the planet carrier 120, the sun gear shaft 110, etc. of the planet row 100, a certain gap is usually formed between the sun gear shaft 110 and the planet carrier 120, and in some limit cases, a large amount of lubricating oil flowing into the gap is leaked out through the gap. In order to solve the above-mentioned problem, in the present embodiment, the oil conduit 10 is embedded in the sun gear shaft 110, the oil conduit 10 is installed in the sun gear shaft 110 of the planet carrier 100 in a penetrating manner, specifically in the first hollow cavity 111, and the end of the oil conduit 10 near the planet carrier 100 extends into the oil collecting cavity 124, so as to guide the oil in the sun gear shaft 110 into the oil collecting cavity 124 of the planet carrier. By arranging the oil guide pipe 10, under the condition that the axial oil guide channel is relatively long, the oil guide pipe 10 is used for transmitting lubricating oil from the lubricating oil inlet at the end of the far planet row 100 to the planet carrier 120 of the planet row 100, the situation that the oil cannot reach the planet row 100 due to centrifugal force formed by high-speed operation of the sun gear shaft 110 can be avoided, and the near planet row end of the oil guide pipe 10 extends into the oil collecting cavity 124, so that the leakage amount of the lubricating oil at the gap between the sun gear shaft 110 and the planet carrier 120 can be reduced. The lubricating oil flows through the lubricating channel 160 and finally flows to the planet wheel bearings 171 to lubricate the bearings of the planet wheels 140, so that the sufficient oil quantity of the bearings is ensured, and the problem of whole vehicle safety caused by ablation of the whole planet row 100 is avoided.

The oil guide pipe 10 is provided with a plurality of oil outlet holes 11 which are distributed at intervals along the axial direction and/or the radial direction of the oil guide pipe 10. The oil outlet holes 11 are generally provided in plurality along the axial direction of the guide pipe, and the diameters and the pitch of the oil outlet holes 11 are the same. The oil outlet holes 11 at the same axial position may be provided in plurality, and the plurality of oil outlet holes 11 at the same axial position are circumferentially spaced apart, so that the oil can uniformly flow into the first hollow cavity 111 of the sun gear shaft 110. An oil outlet 11 may be additionally provided at an axial position of the oil guide pipe 10 corresponding to the mounting position of the bearing.

In some embodiments, the distal row 100 of the oil guide pipe 10 has more than one oil outlet 12, and since the oil outlet 12 is disposed on the wall of the oil guide pipe 10, the oil can be discharged radially, the resistance is reduced, and the oil can enter the lubrication channel 160 conveniently. Oil outlet 12 may be configured as a slot or a complete bore with an opening, for example oil outlet 12 may be a U-shaped slot or a circular bore. The number of oil outlets 12 is not limited by the present application, and for example, the number of oil outlets 12 is set to 3, the shape of 3 oil outlets 12 may be the same or different.

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

Application example:

Taking the input shaft assembly 900 suitable for the application of the invention "a hybrid drive system" (publication No. CN113232501 a) as an example, the structure of the input shaft assembly 900 is as follows:

The inner race shaft 200 is supported on the right and left housings of the housing assembly 300 by ball bearings (first support bearings 175) and ball bearings (second support bearings 176) mounted on the sleeve 80, respectively. On the outer side of the inner ring gear shaft 200, a ring gear (first gear 50) is welded integrally with the coupling teeth 42 on the first synchronizer (first actuator S1) side, and is fitted around the inner ring gear shaft 200 by a needle bearing 177a and a thrust bearing 178 so as to be rotatable about the inner ring gear shaft 200, the needle bearing 177a is axially restrained by a shoulder, and the thrust bearing 178 is axially restrained by engagement with the end face 262 of the inner ring gear shaft 200. The gear hub 41 of the first synchronizer is connected with the external spline of the inner gear ring shaft 200 through the internal spline to transmit torque, and the gear hub 41 of the first synchronizer is axially limited through the end face 262 of the inner gear ring shaft 200 and the snap spring 70 arranged in the snap spring groove 261; the small gear ring (the second gear 60) is arranged outside the shaft sleeve part 210 of the inner gear ring shaft 200 through the needle bearing 177c after being welded with the combined gear 42 of the first synchronizer into a whole so as to freely rotate around the inner gear ring shaft 200, the small gear ring (the second gear 60) is axially limited through the shaft sleeve 80 pressed on the shaft diameter of the inner gear ring shaft 200, and the needle bearing 177c is axially limited through shaft shoulders at two sides; the engaging teeth 42 on the second synchronizer (second actuator S2) side are connected to the external spline of the ring gear shaft 200 by the internal spline, and the force is transmitted, so that the engaging teeth 42 of the second synchronizer are axially restrained by the end face 262 of the sleeve 80 and the clip spring 70 fitted in the clip spring groove 261.

Inside the inner ring gear shaft 200, the sun gear shaft 110 is supported in the inner bore 201 of the inner ring gear shaft 200 by two needle bearings 177 b. The hub 41 of the first synchronizer is torque-transmitting by an internally splined connection with the externally splined connection of the sun gear shaft 110. The external spline at the end part of the sun gear shaft 110 is connected with the internal 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 by a ball bearing 179. The ring gear 150 is engaged with the internal spline of the ring gear shaft 200 by the external spline, and is integrally connected to the ring gear shaft 200 to rotate together, and the ring gear 150 is axially limited by the end face 262 of the ring gear shaft 200 and the clip spring 70 mounted in the clip spring groove 261. The ring gear 150 supports the entire planetary gear system on the ring gear shaft 200 by meshing with the pinion gears. The planet carrier 120 is mounted on the right housing through a needle bearing (second planet carrier bearing 121) 173, the planet carrier shaft 121 is press-fitted on the connection plates 122 on both sides of the planet carrier 120 through interference, the planet gears 140 are mounted on the planet carrier shaft 121 through a needle bearing (planet carrier bearing 171), and the planet gears 140 are engaged with the ring gear 150 and the sun gear 130, respectively.

The input shaft assembly 900 provided in this embodiment 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) through the inner gear ring shaft 200, and the planetary gear 100, and is connected to the motor through the inside support sun gear shaft 110, and also integrates the lubrication system of the planetary gear bearing 171, the actuator 40, the gear gears and the related bearings, and the cooling system of the motor. The inner gear shaft 200 provides a supporting structure for each system through the inner and outer profiles and is mounted on the left and right housings of the housing assembly through the first supporting bearings 175 and the second supporting bearings 176 on both sides, so that the input shaft assembly 900 can be highly integrated together, arrangement mounting positions and interfaces of other parts are reduced, axial and radial dimensions of an electric drive system carrying the input shaft assembly 900 are reduced, functional volume of the electric drive system is reduced, cost is reduced, and carrying performance is enhanced, so that products are more competitive.

Example 3:

Based on the same inventive concept, this embodiment provides a hybrid electric drive assembly 1000, referring to fig. 5 to 7, the hybrid electric drive assembly 1000 includes a housing assembly 300 and the input shaft assembly 900 of the above embodiment 2, and the input shaft assembly 900 is installed inside the housing assembly 300. The structure of the housing assembly 300 is designed according to the structure of the input shaft assembly 900, and it is sufficient to satisfy the installation requirement of the input shaft assembly 900, and the specific structure is not limited by the present application.

The hybrid electric drive assembly 1000 further includes a motor assembly 400 coupled to the housing assembly 300, and the motor assembly 400 may be configured to include only one motor, or more than two motors. The rotor of at least one motor of the motor assembly 400 is in driving connection with the sun gear shaft 110 of the planetary row 100, enabling power transfer between the motor and the planetary row 100. Specifically, in the present embodiment, the motor assembly 400 includes a generator 401 and a driving motor 402, where a rotor of the generator 401 is in driving connection with the sun gear shaft 110 of the planetary gear set 100, for example, the rotor of the generator 401 is in spline connection with the sun gear shaft 110 of the planetary gear set 100.

The motor assembly 400 may be disposed within the integrated and housing assembly 300, or the motor assembly 400 may be external. In order to improve the integration level of the hybrid electric drive assembly 1000, the present embodiment adopts a solution with a built-in motor, specifically, the housing assembly 300 includes a right housing 310, a left housing 320 and an end cover 330 which are sequentially connected, the right housing 310 and the left housing 320 enclose a shaft tooth mounting cavity 302, the planet row 100 is located in the shaft tooth mounting cavity 302, and the planet carrier shaft 121 is supported on the right housing 310 through a first planet carrier bearing 172 and a second planet carrier bearing 173. The left housing 320 and the end cap 330 enclose a motor mounting cavity 303, and the motor assembly 400 is located in the motor mounting cavity 303. The rotor 410 of the generator 401 is supported on the left housing 320 and the end cap 330 by two bearings.

In this embodiment, the rotor 410 of the generator 401 is provided with a second hollow cavity 411 penetrating along the axial direction, the oil inlet channel 301, the second hollow cavity 411 and the first hollow cavity 111 are sequentially communicated, the rotor 410 of the motor assembly 400 and the planet row 100 are coaxially arranged, the lubricating oil introduced by the oil inlet channel 301 of the housing assembly 300 is introduced into the first hollow cavity 111 of the planet row 100 through the second hollow cavity 411, the oil guide pipe 10 of the planet row lubricating structure is installed in the second hollow cavity 411 and the first hollow cavity 111, the far planet row 100 end of the oil guide pipe 10 is directly in butt joint communication with the oil inlet channel 301 of the housing assembly 300, and the near planet row 100 end of the oil guide pipe 10 is directly in butt joint communication with the oil collecting cavity 124 of the planet carrier 120. By connecting the rotor 410 of the motor assembly 400 and the internal oil path of the planetary gear set 100 in series, the rotor of the motor serves as a pipeline of lubricating oil, so that the structure of the lubricating system is simplified, and the integration level and the whole vehicle carrying performance of the hybrid electric drive assembly 1000 are improved.

The end cover 330 is provided with an oil inlet channel 301, the bottom of the left shell 320 forms an oil pan, lubricating oil after lubricating the planet row 100 falls into the oil pan, and the external oil pump provides pumping power, so that the lubricating oil circulates in the oil pan, the oil inlet channel 301, the oil guide pipe 10 and the lubricating channel 160.

Since the rotor of the generator 401, the sun gear shaft 110 of the planetary gear set 100, and the ring gear shaft 200 are all required to be provided with bearings for mounting and supporting. In order to increase the bearing mounting hole, in this embodiment, the left housing 320 is provided with a middle plate 321, and the middle plate 321 is a cover body and is fixedly connected with the left housing 320 through a threaded fastener or welding. The intermediate plate 321 is mounted with ball bearings 179 for supporting the rotor 410 of the generator 401, as shown in fig. 3. In order to further increase the integration level, 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 may be directly machined on the intermediate plate 321.

Referring to fig. 7, in some embodiments, the hybrid electric drive assembly 1000 further includes a gear shifting mechanism assembly 500, a countershaft tooth assembly 600, a differential assembly 700, and a controller assembly 800, wherein the gear shifting mechanism assembly 500, the countershaft tooth assembly 600, and the differential assembly 700 are all located in the tooth mounting cavity 302, and the gear shifting mechanism assembly 500 and the countershaft tooth assembly 600 cooperate with the planetary row 100 to achieve speed shifting and gear shifting functions, and power is output from the differential assembly 700 to the wheel axle. The controller assembly 800 is mounted outside the housing assembly 300, and is used for controlling the motor assembly 400 and/or the gear shifting mechanism assembly 500 to work, and of course, the controller assembly 800 can also control the oil pump and some electronic devices such as sensors (temperature sensor, pressure sensor, etc.) arranged inside the hybrid electric drive assembly 1000 to work. The details of the gear shifting mechanism assembly 500, the intermediate shaft gear assembly 600, and the controller assembly 800 are described with reference to related disclosures of the prior art, and are not described herein.

Example 4:

Based on the same inventive concept, the present embodiment provides a vehicle including the hybrid electric drive assembly 1000 of embodiment 3 described above, that is, the vehicle is a hybrid vehicle powered by an engine and a motor. Since the vehicle is provided with the hybrid electric drive assembly 1000 of the above embodiment 3, the hybrid electric drive assembly 1000 has at least all the advantageous effects of the technical solution of the above embodiment 3, and is highly integrated and small in size, and can be mounted in engine cabins of vehicles of different vehicle types. Other undescribed structures of the vehicle are referred to in the related art disclosures, and are not described herein.

Example 5:

Based on the same inventive concept, the present embodiment provides a vehicle, which includes the input shaft assembly 900 of embodiment 2, that is, the vehicle may be a hybrid vehicle, a pure electric vehicle, or a common fuel vehicle, and the engine and/or the motor may provide power, so that the input shaft assembly 900 of embodiment 2 can achieve the effects of gear shifting and speed changing. Other undescribed structures of the vehicle are referred to in the related art disclosures, and are not described herein.

Example 6:

Based on the same inventive concept, the present embodiment provides a vehicle including the inner ring gear shaft of the above embodiment 1, that is, the vehicle may be a hybrid vehicle or a pure electric vehicle or a general fuel vehicle, powered by an engine and/or a motor, and the inner ring gear shaft of the above embodiment 1 may be applied to a transmission of the vehicle, or an in-wheel motor system. Other undescribed structures of the vehicle are referred to in the related art disclosures, and are not described herein.

While preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the application.

It will be apparent to those skilled in the art that various modifications and variations can be made to the present application without departing from the spirit or scope of the application. Thus, it is intended that the present application also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.

Claims

1. An inner ring gear shaft, characterized by being applied to an electric drive system; the planetary gear is sleeved outside the planetary gear of the electric drive system and is arranged on the shell assembly of the electric drive system through a support bearing; the internal gear ring shaft includes:

The shaft sleeve part is sleeved on a sun gear shaft or a planet carrier shaft of the planet row, and is provided with at least one first installation position for installing an executing mechanism, and the executing mechanism is used for changing the transmission ratio of the planet row;

2. The internal gear shaft according to claim 1, characterized in that: the cover part comprises a tooth sleeve part and a baffle plate part, wherein an inner ring of the baffle plate part is connected with the shaft sleeve part, and an outer ring of the baffle plate part is connected with the tooth sleeve part.

3. The internal gear shaft according to claim 2, characterized in that: the tooth sleeve part and the inner gear ring are in an integrated structure or are connected through keys; the shaft sleeve part, the baffle plate part and the tooth sleeve part are of an integrated structure.

4. The internal gear shaft according to claim 3, characterized in that: the tooth sleeve part is connected with the inner gear ring through a spline; and the internal spline of the tooth sleeve part is provided with a clamp spring groove.

5. The internal gear shaft according to claim 2, characterized in that: the tooth sleeve part and the shaft sleeve part are respectively provided with the assembly position; the assembly position of the tooth sleeve part is an inner hole wall, and the assembly position of the shaft sleeve part is provided with a shaft sleeve for installing the support bearing.

6. The internal gear shaft according to claim 5, characterized in that: and a limiting structure for axially limiting the support bearing is arranged between the assembly position of the tooth sleeve part and the installation position of the inner gear ring.

7. The internal gear shaft according to claim 2, characterized in that: the tooth sleeve part and the shaft sleeve part are respectively provided with the second installation position; the second installation position is provided with a limiting structure for limiting the gear or the bearing of the gear axially.

8. The internal gear shaft according to claim 1, characterized in that: the first installation position is of a key connection structure; and a limiting structure for axially limiting the actuating mechanism is arranged on the first mounting position.

9. The internal gear shaft according to any one of claims 1 to 8, characterized in that: the first installation position, the installation position and the second installation position are respectively provided with two parts; the two first installation positions are distributed at two ends of the shaft sleeve part; the two fitting bits and the two second mounting bits are respectively provided on the boss portion and the cover portion.

10. The internal gear shaft according to any one of claims 1 to 8, characterized in that: at least one oil guide hole penetrating through the sleeve wall of the shaft sleeve part is formed in the shaft sleeve part and/or the cover part; the outer surface of the shaft sleeve part is provided with an oil guide groove communicated with the oil guide hole.

11. An input shaft assembly, comprising: a planetary row for connecting an engine, at least one actuator, at least one support bearing, at least one gear and the inner ring gear shaft according to any one of claims 1 to 10; the inner gear ring is sleeved on a sun gear shaft or a planet carrier shaft of the planet row, and the cover part of the inner gear ring shaft is in transmission connection with the inner gear ring of the planet row; the at least one actuator is mounted on the at least one first mounting location; the at least one support bearing is arranged on the at least one assembly; the at least one gear is disposed on the at least one second mounting location.

12. The input shaft assembly as in claim 11, wherein: the at least one executing mechanism comprises a first executing mechanism and a second executing mechanism; the at least one support bearing includes a first support bearing and a second support bearing; the at least one gear includes a first gear and a second gear.

13. The input shaft assembly as in claim 12, wherein: the first executing mechanism and the second executing mechanism are distributed at two ends of the shaft sleeve part; the first support bearing is arranged in the inner hole of the cover part, and the second support bearing is arranged between the first executing mechanism and the second executing mechanism through a shaft sleeve; the first gear is sleeved on the cover part through a bearing, and the second gear is sleeved on the shaft sleeve part through a bearing and is positioned between the first executing mechanism and the second supporting bearing.

14. The input shaft assembly as in claim 13, wherein: the first gear comprises a gear ring part and a connecting part, the gear ring part is sleeved on the cover part through a bearing, and the connecting part is fixedly connected with the combining teeth on one side of the first executing mechanism; the gear hub of the first executing mechanism is in transmission connection with the first installation position; the combined teeth on the other side of the first executing mechanism are fixedly connected with the second gear, and the second gear is limited axially through the shaft sleeve.

15. The input shaft assembly as in claim 13, wherein: the gear hub of the second actuating mechanism is in transmission connection with the sun gear shaft of the planetary gear row, the combination teeth on one side of the second actuating mechanism are in transmission connection with the shaft sleeve part, and the combination teeth on the other side of the second actuating mechanism are fixedly connected with the shell assembly.

16. The input shaft assembly as in claim 11, wherein: the sun gear shaft or the planet carrier shaft of the planet row is provided with a connecting structure for being in transmission connection with the motor assembly.

17. The input shaft assembly as in claim 11, wherein: the planet row is provided with a lubrication channel, and an outlet of the lubrication channel faces to a planet wheel bearing of the planet row; the sun gear shaft of the planet row is provided with a first hollow cavity which is communicated in the axial direction, the planet carrier of the planet row is provided with an oil collecting cavity, and the first hollow cavity, the oil collecting cavity and the lubricating channel are sequentially communicated.

18. The input shaft assembly as in claim 17, wherein: the planet carrier comprises a planet carrier shaft, a connecting plate and a planet wheel shaft which are sequentially connected, wherein the planet carrier shaft is provided with the oil collecting cavity and the first oil guide hole which are communicated, and the planet wheel shaft is provided with the second oil guide hole;

19. The input shaft assembly as in claim 17, wherein: a support bearing is arranged between the sun gear shaft and the inner gear ring shaft; the sun gear shaft is provided with at least one fourth oil guide hole communicated with the first hollow cavity, and the outlet of one fourth oil guide hole faces the support bearing.

20. The input shaft assembly as in claim 17, wherein: the input shaft assembly further comprises an oil guide pipe, the oil guide pipe is installed in the first hollow cavity in a penetrating mode, and the near planet row end extends into the oil collecting cavity.

21. The input shaft assembly as in claim 20, wherein: the oil guide pipe is provided with a plurality of oil outlet holes which are distributed at intervals along the axial direction and/or the radial direction of the oil guide pipe; an oil outlet is arranged at the far planet row end of the oil guide pipe; the oil outlet is a U-shaped groove and/or a round hole.

22. A hybrid electric drive assembly, comprising:

A housing assembly;

The input shaft assembly of any one of claims 11-21 mounted inside the housing assembly.

23. The hybrid electric drive assembly of claim 22, wherein: the hybrid electric drive assembly further comprises a motor assembly connected with the shell assembly, and a rotor of the motor assembly is in transmission connection with a sun gear shaft of the planet row.

24. The hybrid electric drive assembly of claim 23, wherein: the shell assembly comprises a right shell, a left shell and an end cover which are sequentially connected, wherein the right shell and the left shell are encircled to form a shaft tooth installation cavity, and the left shell and the end cover are encircled to form a motor installation cavity; the input shaft assembly is located in the shaft tooth mounting cavity, and the motor assembly is located in the motor mounting cavity.

25. The hybrid electric drive assembly of claim 24, wherein: the left shell is provided with a middle plate, and a third support bearing for supporting a rotor of the motor assembly is arranged on the middle plate; and the combining teeth of one actuating mechanism are fixedly connected with the middle plate.

26. The hybrid electric drive assembly of claim 23, wherein: the motor assembly comprises a generator and a driving motor, and a rotor of the generator is in transmission connection with a sun gear shaft of the planet row.

27. The hybrid electric drive assembly of claim 26, wherein: the rotor of the generator is internally provided with a second hollow cavity which is communicated with the first hollow cavity of the sun gear shaft of the planet row.

28. A vehicle, characterized in that: comprising a hybrid electric drive assembly according to any one of claims 22-27; or comprising the input shaft assembly of any one of claims 11-21; or comprises the inner ring gear shaft as claimed in any one of claims 1 to 10.