Planetary gear lubrication arrangement and vehicle

Abstract

The application discloses a planetary row lubricating structure and a vehicle. The planetary row lubricating structure comprises a reduction gearbox, a planetary row and an oil collecting disc. The reduction gearbox is provided with a reduction gear mounting cavity and an oil storage cavity in communication. The planetary row is located in the reduction gear mounting cavity, and a first bearing is arranged between the planetary row and the reduction gearbox. An oil guide cavity and an oil guide hole in communication are arranged in a planetary wheel shaft of the planetary row. A planetary gear of the planetary row is mounted on the planetary wheel shaft through a second bearing, and the second bearing is in position correspondence with the oil guide hole. The oil collecting disc is connected with a planet carrier of the planetary row, and the oil collecting disc is provided with a same number of oil outlet nozzles as the planetary wheel shafts. The oil outlet nozzles extend into the corresponding oil guide cavities to connect the oil guide cavities and oil collecting cavities of the oil collecting disc. A plurality of oil channels are arranged in a wall of the reduction gearbox, and the mounting space of the first bearing and the oil collecting cavities of the oil collecting disc are respectively connected with the corresponding oil channels. The planetary row is actively sprayed and lubricated by the oil collecting disc, and the cooling effect is good. No oil pipe needs to be arranged outside the reduction gearbox, and the structure of the reduction gearbox is more compact.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of planetary gear set lubrication structure, and particularly relates to a planetary gear set lubrication structure and a vehicle. BACKGROUND

[0002] In the related art, the planetary gear set reducer is mostly lubricated and cooled in a gear stirring oil passive mode. However, the gear stirring oil lubrication has a large stirring oil loss and a low cooling efficiency. SUMMARY

[0003] The application aims to at least solve one of the technical problems in the prior art. To this end, the application provides a planetary gear set lubrication structure and a vehicle, which are actively lubricated by setting an oil collecting disc.

[0004] In a first aspect of the application, a planetary gear set lubrication structure is provided, comprising:

[0005] A reduction gearbox is provided with a reduction gear mounting cavity and an oil storage cavity in communication, and a plurality of oil channels are arranged in the wall of the reduction gearbox;

[0006] A planetary gear set is arranged in the reduction gear mounting cavity, and a first bearing is arranged between the planetary gear set and the reduction gearbox; an oil guide cavity and an oil guide hole are arranged in the sun gear shaft of the planetary gear set in communication; a planetary gear is arranged on the sun gear shaft through a second bearing, and the second bearing is in position correspondence with the oil guide hole;

[0007] An oil collecting disc is connected with the planet carrier of the planetary gear set, and a plurality of oil outlet nozzles are arranged in the oil collecting disc in the same number as the sun gear shafts, and the oil outlet nozzles are arranged in the corresponding oil guide cavities to connect the oil guide cavities and the oil collecting cavity of the oil collecting disc;

[0008] The mounting space of the first bearing and the oil collecting cavity of the oil collecting disc are in communication with the corresponding oil channels, respectively.

[0009] In some embodiments, an oil pump is further arranged on the reduction gearbox and close to the oil storage cavity; the oil channels include a first oil channel, and the oil pump is in communication with the oil storage cavity through the first oil channel.

[0010] In some embodiments, the oil storage cavity is arranged at the bottom of the reduction gearbox, and an oil filter and a magnet are arranged in the wall of the reduction gearbox, and the oil filter and the magnet are arranged in the first oil channel.

[0011] In some embodiments, the first oil channel has two openings in communication with the outside, and a plug is arranged in each of the two openings, and the oil filter and the magnet are arranged close to the two openings, respectively.

[0012] In some embodiments, the reduction gearbox comprises a connected reduction gearbox housing and an end cover, the oil passage comprises a second oil passage arranged in the reduction gearbox housing and a third oil passage arranged in the end cover; the second oil passage is in communication with the oil collecting cavity of the oil collecting disc; the third oil passage is in communication with the mounting space of the first bearing.

[0013] In some embodiments, the planet carrier is provided with an output shaft, and the first bearing is arranged between the output shaft and the end cover.

[0014] In some embodiments, the oil collecting disc is annular and is arranged at an end of the planet carrier away from the output shaft.

[0015] In some embodiments, the planet carrier is provided with a third bearing and a fourth bearing between the sun gear of the planet row and the planet carrier.

[0016] In some embodiments, an end of the planet carrier away from the output shaft is provided with a protruding ridge in the axial direction, the oil collecting disc is arranged outside the protruding ridge, and the fourth bearing is embedded inside the protruding ridge.

[0017] In some embodiments, the planet row lubrication structure further comprises:

[0018] A motor housing connected with the reduction gearbox, and a plurality of oil passages arranged in the wall of the motor housing;

[0019] A motor installed in the motor housing, wherein the stator assembly of the motor comprises a stator housing, the stator winding and the stator core of the stator assembly are arranged in the stator mounting cavity of the stator housing, and the stator housing is provided with an oil inlet hole and an oil outlet hole in communication with the stator mounting cavity;

[0020] An oil cooler installed in the motor housing, wherein the oil inlet of the oil cooler is in communication with the oil pump through the oil passage of the reduction gearbox, and the oil outlet of the oil cooler is in communication with the oil inlet hole of the stator housing through the oil passage of the motor housing;

[0021] The rotor assembly of the motor is in transmission connection with the sun gear of the planet row, and the oil outlet hole is in communication with the oil passage of the reduction gearbox.

[0022] In some embodiments, the motor is an axial flux motor, the reduction gearbox is connected to the end opening of the motor housing and is close to the rotor assembly.

[0023] In some embodiments, an oil seal is arranged between the reduction gearbox and the rotating disc of the rotor assembly, and the sun gear is provided with an input shaft which is in key connection with the rotor shaft of the motor.

[0024] In the second aspect of the present application, a vehicle is provided, comprising the planet row lubrication structure described above.

[0025] According to the planetary gear set lubricating structure provided by one or more embodiments of the present application, the reduction gearbox is provided with a reduction gearbox mounting cavity and an oil storage cavity in communication. The planetary gear set is located in the reduction gearbox mounting cavity, and a first bearing is arranged between the planetary gear set and the reduction gearbox. The planetary wheel shaft of the planetary gear set is provided with an oil guide cavity and an oil guide hole in communication. The planetary gear of the planetary gear set is mounted on the planetary wheel shaft through a second bearing, and the second bearing is in position correspondence with the oil guide hole. The oil collecting disc is connected with the planet carrier of the planetary gear set, and the oil collecting disc is provided with the same number of oil outlet nozzles as the planetary wheel shafts. The oil outlet nozzles extend into the corresponding oil guide cavities to connect the oil guide cavities and the oil collecting cavities of the oil collecting disc. The reduction gearbox wall is provided with a plurality of oil channels, and the installation space of the first bearing and the oil collecting cavities of the oil collecting disc are respectively connected with the corresponding oil channels. The oil collecting disc actively sprays oil to lubricate the planetary gear set, and the cooling effect is good. The lubricating oil is transported from the reduction gearbox wall to the oil collecting disc and the bearings of the planet carrier. The bearings of the planet carrier do not need to be additionally provided with an oil guide structure, and the reduction gearbox does not need to be provided with an oil pipe outside, and the reduction gearbox structure is more compact. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0027] Figure 1 A cross-sectional view of the planetary gear set lubricating structure in one or more embodiments of the present application is shown.

[0028] Figure 2 A structure diagram of the oil collecting disc of the planetary gear set lubricating structure of Figure 1 . Figure 1 .

[0029] Figure 3 A structure diagram of the oil collecting disc of the planetary gear set lubricating structure of Figure 1 . Figure 2 .

[0030] Figure 4 A full cross-sectional view of the oil collecting disc of 2 and Figure 3 . Figure 1 .

[0031] Figure 5 A full cross-sectional view of the oil collecting disc of 2 and Figure 3 . Figure 2 .

[0032] Figure 6 A structure diagram of the planetary gear set lubricating structure in some other embodiments is shown.

[0033] Figure 7 A full sectional view of the planetary row lubrication structure of Figure 6 is shown.

[0034] Figure 8 A structure diagram of the oil passage of the planetary row lubrication structure of Figure 6 is shown. Figure 1 .

[0035] Figure 9 A structure diagram of the oil passage of the planetary row lubrication structure of Figure 6 is shown. Figure 2 .

[0036] Figure 10 A structure diagram of the oil passage of the planetary row lubrication structure of Figure 6 is shown. Figure 3 .

[0037] Figure 11 A structure diagram of the oil passage of the planetary row lubrication structure of Figure 6 is shown. Figure 4 .

[0038] Figure 12 A structure diagram of the oil passage of the planetary row lubrication structure of Figure 6 is shown. Figure 5 .

[0039] Figure 13 A structure diagram of the cooling lubrication circuit of the planetary row lubrication structure of Figure 6 is shown.

[0040] Explanation of reference numerals: 100 - axial flux motor, 110 - stator assembly; 111 - stator housing, 111a - stator mounting cavity, 111b - oil inlet hole, 111c - oil outlet hole, 111e - cooling oil channel, 120a - first rotor assembly; 120b - second rotor assembly, 121 - rotor shaft; 200 - housing assembly; 210 - motor housing, 210a - motor mounting cavity, 211 - mounting plate, 212 - fourth oil channel, 213 - fifth oil channel, 214 - sixth oil channel; 220 - reduction gearbox, 220a - reducer mounting cavity; 221 - reducer housing, 2211 - second oil channel; 222 - end cover, 2221 - first oil channel, 2222 - third oil channel, 2223 - opening, 2224 - plug, 2225 - oil filter, 2226 - magnet; 230 - controller housing, 230a - controller mounting cavity, 231 - main body, 232 - cover plate. 300 - controller; 400 - reducer; 410 - planetary row, 411 - sun gear, 4111 - input shaft, 4112 - support stop; 412 - planet carrier, 4121 - output shaft, 4122 - convex edge; 413 - planet gear; 414 - planet wheel shaft, 414a - oil guide cavity, 414b - oil guide hole; 415 - ring gear; 420 - first bearing; 430 - second bearing; 440 - third bearing; 450 - oil collecting disc, 450a - oil collecting cavity, 451 - oil outlet nozzle, 452 - oil blocking plate, 453 - avoidance area, 454 - mounting hole. 500 - oil pump; 600 - oil cooler; 700 - rotary transformer; 801 - first oil seal; 802 - second oil seal. DETAILED DESCRIPTION

[0041] In order for those skilled in the art to which the present application pertains to more clearly understand the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0042] In addition, reference numerals and / or reference letters can be repeated in different examples in the present application, and such repetition is for the purpose of simplification and clarity, and does not indicate the relationship between the various embodiments and / or arrangements being discussed. In addition, the present application provides examples of various specific processes and materials, but those of ordinary skill in the art can realize the application of other processes and / or the use of other materials.

[0043] The specific technical solutions of the present application will be described in detail below with reference to the drawings which are not necessarily drawn to scale. Similar or identical reference numerals can be used to designate similar or identical parts in different drawings. The use of similar or identical reference numerals in different drawings does not mean that all drawings comprising similar or identical reference numerals constitute a single or same embodiment. The drawings generally illustrate various embodiments discussed in the present application in an exemplary and non-limiting manner.

[0044] Referring to Figure 1 In the first aspect of the present application, a planetary gear set lubricating structure is provided, which comprises a reduction gearbox 220, a planetary gear set 410 and an oil collecting disc 450. The reduction gearbox 220 is provided with a reduction gear mounting cavity 220a and an oil storage cavity (not shown in the figure) in communication. The planetary gear set 410 is located in the reduction gear mounting cavity 220a, and a first bearing 420 is arranged between the planetary gear set 410 and the reduction gearbox 220. The planetary wheel shaft 414 of the planetary gear set 410 is provided with an oil guide cavity 414a and an oil guide hole 414b in communication. The planetary gear 413 of the planetary gear set 410 is mounted on the planetary wheel shaft 414 through a second bearing 430, and the second bearing 430 corresponds in position to the oil guide hole 414b.

[0045] The planetary wheel shaft 414 of the planetary gear set 410 is provided with an oil guide cavity 414a and an oil guide hole 414b in communication. The planetary gear 413 of the planetary gear set 410 is mounted on the planetary wheel shaft 414 through a second bearing 430, and the second bearing 430 corresponds in position to the oil guide hole 414b. The oil collecting disc 450 is connected to the planet carrier 412 of the planetary gear set 410, and the oil collecting disc 450 is provided with a number of oil outlet nozzles 451 equal to the number of planetary wheel shafts 414. The oil outlet nozzles 451 extend into the corresponding oil guide cavities 414a to connect the oil guide cavities 414a and the oil collecting cavity 450a of the oil collecting disc 450. A plurality of oil channels are arranged in the wall of the reduction gearbox 220, and the mounting space of the first bearing 420 and the oil collecting cavity 450a of the oil collecting disc 450 are respectively connected to the corresponding oil channels. The oil collecting disc 450 actively sprays oil to lubricate the planetary gear set 410, and the cooling effect is good. The lubricating oil is transported from the wall of the reduction gearbox 220 to the oil collecting disc 450 and the bearings of the planet carrier 412. The bearings of the planet carrier 412 do not need to be additionally provided with an oil guide structure, and the reduction gearbox 220 does not need to be provided with an oil pipe outside, so that the structure of the reduction gearbox 220 is more compact.

[0046] The lubricating oil of the planetary gear set 410 can be pumped into the oil channels by an oil pump, and then into the reduction gear mounting cavity 220a. The oil pump can be mounted on the reduction gearbox 220, or other oil pumps of a vehicle provided with the planetary gear set lubricating structure can provide oil for the planetary gear set lubricating structure. The present application does not make any limitation.

[0047] Referring to Figure 1In some embodiments, the planet gears 413 of the planetary gear set 410 are mounted on the planet shaft 414 through two symmetrically arranged second bearings 430, which are conical roller bearings capable of bearing axial force. The oil guide holes 414b are in communication with the gaps between the two conical roller bearings. The lubricating oil enters the second bearings 430 through the gaps between the two conical roller bearings, lubricates the second bearings 430, and then flows out to lubricate the meshing positions of the planet gears 413, the ring gear 415 and the sun gear 411, and the third bearing 440 and the fourth bearing 460 between the sun gear 411 and the planet carrier 412. Subsequently, the oil drops under the action of gravity and falls into the oil storage cavity. The oil storage cavity can be formed by the bottom portion of the reducer mounting cavity 220a, or can be an oil pan additionally arranged at the bottom of the reducer mounting cavity 220a, which is not limited in the present application.

[0048] To prevent oil leakage, a plurality of oil seals are arranged at the connection between the planetary gear set 410 and the reduction box 220. Please refer to Figure 1 In some embodiments, the sun gear 411 of the planetary gear set 410 is provided with an input shaft 4111, and the planet carrier 412 of the planetary gear set 410 is provided with an output shaft 4121. A first bearing 420 is arranged between the output shaft 4121 and the reduction box 220. That is, the planetary gear set 410 adopts a structure in which the sun gear 411 is input and the planet carrier 412 is output. Correspondingly, a first oil seal 801 is arranged between the input shaft 4111 and the reduction box 220. A second oil seal 802 is arranged between the output shaft 4121 and the reduction box 220, and the second oil seal 802 is located outside the first bearing 420.

[0049] Please refer to Figure 1 In some embodiments, the reduction box 220 includes a connected reducer housing 221 and an end cover 222. The first oil seal 801 is arranged between the reducer housing 221 and the input shaft 4111, and the second oil seal 802 is arranged between the end cover 222 and the output shaft 4121.

[0050] Please refer to Figure 2 and Figure 3 Fig. 8 shows a structural schematic diagram of the oil collecting disc 450 in some embodiments. The oil collecting disc 450 is annular, and is sleeved on the end of the planet carrier 412 away from the output shaft 4121 and rotates together with the planet carrier 412. The oil collecting disc 450 is provided with a plurality of oil outlet nozzles 451 corresponding to the number of planet shafts 414 of the planetary gear set 410. The lubricating oil is input into the oil collecting disc 450, and can flow out through each oil outlet nozzle 451 to each planet gear 413 and the corresponding bearing.

[0051] Please refer to Figure 4In some embodiments, the oil collection disc 450 is provided with a plurality of oil baffle plates 452, the number of the oil baffle plates 452 is the same as the number of the oil outlet nozzles 451, and the root of each oil baffle plate 452 is located close to the corresponding oil outlet nozzle 451. By providing the oil baffle plates 452, the oil can be gathered at the root of the oil baffle plates 452 in the rotating oil collection disc 450, so that the oil enters the oil outlet nozzle 451.

[0052] Referring to Figure 4 In some embodiments, the oil baffle plates 452 are radially inclined relative to the oil collection disc 450, and along the rotation direction of the oil collection disc 450, the root of the oil baffle plate 452 is located in front of the corresponding oil outlet nozzle 451, and the free end of the oil baffle plate 452 is located behind the corresponding oil outlet nozzle 451. When the oil collection disc 450 rotates in the direction indicated by the arrow in Figure 4 , the oil will rotate relative to the oil collection disc 450 due to inertia, which can be understood as that the oil collection disc 450 and the oil both rotate in the direction indicated by the arrow in Figure 4 , and the rotation speed of the oil collection disc 450 is faster than that of the oil, so the oil will gradually gather at the root of the oil baffle plate 452 and flow along the oil baffle plate 452 to the free end of the oil baffle plate 452, and finally enter the oil outlet nozzle 451.

[0053] Referring to Figure 5 In some embodiments, the oil collection disc 450 is mounted on the planet carrier 412 by screws, in order to facilitate the installation of the screws, the side plate of the oil collection disc 450 away from the oil outlet nozzles 451 is provided with a plurality of avoiding areas 453, and the side plate of the oil collection disc 450 on which the oil outlet nozzles 451 are located is provided with a plurality of mounting holes 454, each avoiding area 453 corresponds to each mounting hole 454, and when mounting, a sleeve can be arranged in the avoiding area 453, and the screw is installed through the internal space of the sleeve, so as to avoid that the screw accidentally falls into the oil collection cavity 450a.

[0054] The planetary gear set lubricating structure can be applied to any power system in the prior art, for example, the planetary gear set of the planetary gear set lubricating structure can be used as a reducer of an engine, and can be used as a reducer of a motor. Therefore, the planetary gear set lubricating structure can be applied to an oil car, a pure electric car or a hybrid electric vehicle.

[0055] The lubricating oil can be input into the oil collecting disc 450 through an externally arranged oil pipe or through an oil channel formed in the tank wall of the housing assembly 200. Further, when the planetary gear lubricating structure is used as a reducer of the motor, the cooling oil of the stator assembly of the motor can be mixed with the lubricating oil of the planetary gear 410, i.e. the oil is first input into the stator assembly to cool the stator assembly, and then is input into the oil collecting disc 450 through the oil channel formed in the tank wall of the housing, and finally falls into the reducer mounting cavity 220a after lubricating the planetary gear 410. The oil pump is in communication with the reducer mounting cavity 220a to pump the oil falling into the reducer mounting cavity 220a to the stator assembly 110.

[0056] Please refer to Figure 6 , which shows a structural schematic diagram of the planetary gear lubricating structure in some embodiments. In addition to all the above, the planetary gear lubricating structure further includes the housing assembly 200, the controller 300 and at least two axial flux motors 100. The planetary gear 410 is in transmission connection with the axial flux motor 100 to output power output by the axial flux motor 100 after being decelerated. The planetary gear 410 can be connected with the housing assembly 200 or can be installed inside the housing assembly 200.

[0057] The controller 300 is in electrical connection with the axial flux motor 100 to provide three-phase current for the stator assembly of the axial flux motor 100 and to communicate data with the vehicle controller 300 to control the working condition of the axial flux motor 100 and to feed back the working parameters of the axial flux motor 100. The controller 300 is connected with the housing assembly 200. The controller 300 can be an independent part connected with the housing assembly 200. The controller 300 can also be installed inside the housing assembly 200. The axial flux motor 100 is installed in the housing assembly 200, and the housing assembly 200 serves as the motor shell of the axial flux motor 100.

[0058] To meet the cooling requirement of the stator assembly 110 in the axial flux motor 100, in some embodiments, the planetary gear lubricating structure further includes an oil pump 500 and an oil cooler 600. The oil pump 500 and the oil cooler 600 are respectively installed at different positions of the housing assembly 200, and the oil pump 500, the oil cooler 600 and the stator shell 111 are in communication. The oil pump pumps oil into the oil cooler 600, and the oil cooler 600 is used to cool the oil. The oil cooler 600 can cool the oil in a way of air cooling or water cooling, which is not limited in the application. The oil inlet of the oil cooler 600 is in communication with the oil pump 500, and the oil outlet of the oil cooler 600 is in communication with the oil inlet hole 111b of the stator assembly 110.

[0059] The planetary gear lubricating structure can be a single motor system or a double motor system. Please refer to Figure 7In some embodiments, the planetary row lubrication structure adopts a dual-motor system, i.e. two axial flux motors 100 are provided. The two axial flux motors 100 are arranged in parallel along the axial direction in a posture in which the second rotor assemblies 120b are close to each other. The planetary row lubrication structure corresponds to include two reducers 400, and the two reducers 400 are respectively in driving connection with the two axial flux motors 100, for outputting power output by the two axial flux motors 100 to the outside after being reduced.

[0060] Referring to Figure 6 and Figure 11 , structural schematic diagrams and full cross-sectional diagrams of the planetary row lubrication structure in some embodiments are shown, the planetary row lubrication structure is configured with two axial flux motors 100 and two single-planet row reducers 400. The housing assembly 200 is provided with a controller mounting cavity 230a, a motor mounting cavity 210a and a reducer mounting cavity 220a. The controller 300 is located in the controller mounting cavity 230a, the two axial flux motors 100 are arranged in parallel along the axial direction of the axial flux motor 100 in the motor mounting cavity 210a, and the two planetary rows 410 are located in the reducer mounting cavity 220a and are symmetrically distributed on the outer sides of the two axial flux motors 100, so that the planetary row lubrication structure is substantially symmetrical. The two planetary rows 410 are respectively in driving connection with the rotor assemblies of the two axial flux motors 100, for outputting power output by the two axial flux motors 100 to the outside after being reduced and torque-increased.

[0061] Referring to Figure 7 In some embodiments, the housing assembly 200 includes a motor housing 210, a controller housing 230 and two reducer boxes 220, the two reducer boxes 220 are respectively connected to the openings at the two ends of the motor housing 210 and are close to the rotor assemblies. The reducer box 220 and the motor housing 210 jointly form the motor mounting cavity 210a, the inner cavity of the controller housing 230 forms the controller mounting cavity 230a, the inner cavity of the reducer box 220 forms the reducer mounting cavity 220a, the reducer box 220 is internally provided with an oil storage cavity, the oil storage cavity is in communication with the reducer mounting cavity 220a, and the oil dripped by each component mounted in the reducer mounting cavity 220a is collected in the oil storage cavity. Along the axial direction of the axial flux motor 100, the motor housing 210 and the two reducer boxes 220 share a common wall, which can significantly reduce the axial dimension of the planetary row lubrication structure.

[0062] In some embodiments, the motor housing 210 and the main body 231 of the controller housing 230 are integrated, i.e., one of the chambers of the motor housing 210 is the motor mounting cavity 210a and the other is the controller mounting cavity 230a. The cover plate 232 of the controller housing 230 is connected to the motor housing 210 to seal the controller mounting cavity 230a. The integration of the motor housing 210 and the controller housing 230 can significantly reduce the size of the planetary row lubrication structure in the direction perpendicular to the axial direction.

[0063] To further reduce the axial size of the planetary row lubrication structure and improve the power density of the planetary row lubrication structure, please refer to Figure 12 In some embodiments, the rotor shaft 121 is provided with a spline groove 1214, and the sun gear 411 of the planetary row 410 is provided with an input shaft 4111, which is keyed to the spline groove 1214. The torque output by the rotor shaft 121 is transmitted to the planetary row 410 through the sun gear 411. In some embodiments, the first shaft section 1211 of the rotor shaft 121 is hollow inside, and the spline groove 1214 is provided on the inner wall thereof.

[0064] Since the spline connection between the input shaft 4111 and the rotor shaft 121 is not visible, the input shaft 4111 and the rotor shaft 121 can only be assembled blindly. To avoid interference between the two during assembly, please refer to Figure 12 In some embodiments, the inner wall of the rotor shaft 121 is provided with a hole shoulder, and the input shaft 4111 is provided with a support stop 4112. When the input shaft 4111 is moved axially to the abutment between the support stop 4112 and the hole shoulder and is axially limited, the spline groove 1214 of the rotor shaft 121 and the outer spline of the input shaft 4111 are stably engaged, and the end of the input shaft 4111 does not interfere with the cavity wall of the rotor shaft 121. In addition, the support stop 4112 and the inner wall of the rotor shaft 121 are in sliding fit, which also plays a role in guiding and ensuring the coaxiality of the sun gear 411 and the rotor shaft 121.

[0065] Taking the planetary row lubrication structure of the axial flux motor 100 with an overall outer diameter of 310 mm as an example, the outer envelope size of the planetary row lubrication structure is 380*420*290 mm, of which the axial size is 420 mm and the height is 290 mm. The smaller axial size allows the planetary row lubrication structure to be directly assembled between two wheels along the Y direction (vehicle width direction), and the torques output by the two planetary rows 410 drive the two wheels respectively.

[0066] In the planetary gear set 410, the sun gear 411 and the input shaft 4111 can be in an integral structure, or the sun gear 411 and the input shaft 4111 can be connected by a key, a bolt or the like, which is not limited in the application. In some embodiments, the input shaft 4111 and the sun gear 411 are integrally formed to form a gear shaft, and the gear shaft is a hollow shaft to reduce the weight of the gear shaft, and the hollow shaft can also supply lubricating oil to the meshing position of the spline groove 1214 of the rotor shaft 121 and the outer spline of the input shaft 4111, and the matching position of the support block 4112 of the input shaft 4111 and the inner wall of the rotor shaft 121. To prevent the lubricating oil from entering the motor mounting cavity 210a, a first oil seal 801 is arranged between the reduction gearbox 220 and the rotating disc of the rotor assembly close to the reduction gearbox 220.

[0067] Referring to Figure 7 and Figure 12 In some embodiments, the two axial flux motors 100 are arranged in an axial and side-by-side manner with the second rotor assemblies 120b close to each other, the stators of the two rotary transformers 700 are connected to the motor housing 210 respectively, and the rotors of the two rotary transformers 700 are connected to the two second rotating discs 122b respectively. Specifically, the inside of the motor housing 210 is provided with a mounting plate 211, and the stators of the two rotary transformers 700 are symmetrically mounted on both sides of the mounting plate 211 by bolts. The second rotating disc 122b of each axial flux motor 100 is provided with a second mounting portion 1223, and the rotor of the rotary transformer 700 is sleeved on the second mounting portion 1223 in an interference fit. The first rotating disc 122a of each axial flux motor 100 is provided with a first mounting portion 1222, which is an annular protrusion, and the reduction gearbox 220 is sleeved on the first mounting portion 1222, and the first oil seal 801 is installed between the reduction gearbox 220 and the first mounting portion 1222.

[0068] Referring to Figure 7 and Figure 12 In some embodiments, the reduction gearbox 220 includes a connected reduction gearbox body 221 and an end cover 222, the reduction gearbox body 221 is connected to the motor housing 210, and the oil seal is installed between the reduction gearbox body 221 and the first mounting portion 1222. The planetary carrier 412 of the planetary gear set 410 is provided with an output shaft 4121, and a first bearing 420 is arranged between the output shaft 4121 and the end cover 222. To prevent the lubricating oil from leaking, a second oil seal 802 is arranged between the output shaft 4121 and the end cover 222.

[0069] The lubricating oil can be input into the oil collecting disc 450 through an externally arranged oil pipe or through an oil channel formed in the tank wall of the housing assembly 200. Further, the cooling oil of the stator assembly 110 of the axial flux motor 100 can be mixed with the lubricating oil of the planetary row 410, i.e. the oil first enters the stator assembly 110 to cool the stator assembly 110, and then is delivered to the oil collecting disc 450 through the oil channel 220c formed in the tank wall of the housing assembly 200, lubricates the planetary row 410, and finally falls into the reducer mounting cavity 220a. The oil pump 500 communicates with the reducer mounting cavity 220a to pump the oil falling in the reducer mounting cavity 220a to the stator assembly 110.

[0070] Please refer to Figures 8 to 12 The oil channel formed in the tank wall of the housing assembly 200 includes a first oil channel 2221 and a second oil channel 2211. The oil pump 500 communicates with the oil storage cavity through the first oil channel 2221, and the oil collecting cavity 450a of the oil collecting disc 450 communicates with the second oil channel 2211. Please refer to Figures 8 to 12 The oil channel formed in the tank wall of the housing assembly 200 further includes a third oil channel 2222, a fourth oil channel 212, a fifth oil channel 213 and a sixth oil channel 214. The third oil channel 2222 communicates with the mounting space of the first bearing 420. The oil cooler 600 communicates with the oil pump 500 through the fourth oil channel 212. The oil cooler 600 communicates with the oil inlet hole 111b of the stator housing 111 through the fifth oil channel 213, and the oil outlet hole 111c of the stator housing 111 communicates with the second oil channel 2211 and the third oil channel 2222 through the sixth oil channel 214.

[0071] In some embodiments, the housing assembly 200 includes a motor housing 210, a reducer tank 220 and a controller housing 230. The reducer tank 220 includes a reducer tank body 221 and an end cover 222 connected thereto. The reducer tank 220 is connected to the end opening of the motor housing 210 and is close to the first rotor assembly 120a. The first oil channel 2221 and the third oil channel 2222 are arranged in the end cover 222, the second oil channel 2211 is arranged in the reducer tank body 221, the fourth oil channel 212 and the sixth oil channel 214 are arranged in the motor housing 210 and the reducer tank body 221 at the same time, and the fifth oil channel 213 is arranged in the motor housing 210.

[0072] Please refer to Figure 8In some embodiments, the oil filter 2225 and the magnet 2226 are arranged in the box wall of the reduction box 220, and are arranged in the first oil channel 2221. The first oil channel 2221 has two openings 2223 communicating with the outside, and the two openings 2223 are provided with plugs 2224. The oil filter 2225 and the magnet 2226 are arranged close to the two openings 2223 respectively. When the planetary gear set lubricating structure needs to be cleaned or the oil filter 2225 and the magnet 2226 need to be replaced, the corresponding opening 2223 can be opened through the plug 2224, and then the oil filter 2225 or the magnet 2226 in the opening 2223 can be removed for cleaning or replacement.

[0073] In a second aspect, the embodiments of the present application provide a vehicle, which comprises the planetary gear set lubricating structure of any one of the embodiments of the first aspect. The vehicle can be a pure electric vehicle or a hybrid vehicle, which is not limited in the present application.

[0074] In the present application, unless specifically defined and limited otherwise, the first feature is "on" or "under" the second feature, which can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "above", "over" and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "under" and "under" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0075] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" indicate the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0076] It should be noted that all directional indications in the embodiments of the present application are only used to explain the relative position relationship, movement condition and the like between components in a certain posture, and if the certain posture changes, the directional indications also change accordingly.

[0077] In the present application, unless specifically defined otherwise, the terms "connected", "fixed", and the like should be construed broadly and do not necessarily denote a direct connection, but can also mean an indirect connection or an interaction in between. Unless otherwise specifically defined, the terms "connected" and "fixed" can mean a mechanical connection, an electrical connection, or a direct connection or an indirect connection through an intermediate medium, or an internal connection of two elements or an interaction between two elements. The specific meaning of the above terms in the present application can be understood by those skilled in the art according to the specific circumstances.

[0078] In addition, the terms "first", "second", and the like in the present application are used only for the purpose of description, and should not be construed as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first" and "second" can explicitly or implicitly include one or more features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specifically defined.

[0079] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in the present application.

[0080] In addition, the technical solutions of various embodiments can be combined with each other, but it must be based on the fact that a person skilled in the art can realize it, when the combination of technical solutions appears contradictory or cannot be realized, it should be considered that the combination of technical solutions does not exist, nor within the scope of protection claimed by the present application.

[0081] Although the embodiments of the present application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and purposes of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A planetary row lubrication arrangement, characterized in that The application relates to a motor and a reduction gearbox. The motor and the reduction gearbox comprise: a reduction gearbox provided with a reduction gearbox mounting cavity and an oil storage cavity in communication, a plurality of oil channels are arranged in the wall of the reduction gearbox; a motor housing connected with the reduction gearbox, a plurality of oil channels are arranged in the wall of the motor housing; a planetary gear train arranged in the reduction gearbox mounting cavity, a first bearing is arranged between the planetary gear train and the reduction gearbox; an oil guide cavity and an oil guide hole are arranged in the sun gear shaft of the planetary gear train in communication; a second bearing is arranged between the sun gear of the planetary gear train and the sun gear shaft; the second bearing is in position correspondence with the oil guide hole; a motor arranged in the motor housing, a stator assembly of the motor comprises a stator housing, the stator winding and the stator core of the stator assembly are arranged in the stator mounting cavity of the stator housing, the stator housing is provided with an oil inlet hole and an oil outlet hole in communication with the stator mounting cavity, the oil outlet hole is in communication with the oil channel of the reduction gearbox; a rotor assembly of the motor is in transmission connection with the sun gear of the planetary gear train; an oil collecting disc connected with the planet carrier of the planetary gear train, a plurality of oil outlet nozzles are arranged in the oil collecting disc in the same number as the sun gear shaft, the oil outlet nozzles are arranged in the corresponding oil guide cavities to connect the oil guide cavities and the oil collecting cavity of the oil collecting disc; an oil cooler arranged in the motor housing, an oil inlet of the oil cooler is in communication with an oil pump through the oil channel of the reduction gearbox, an oil outlet of the oil cooler is in communication with the oil inlet hole through the oil channel of the motor housing; 2. The planetary row lubrication arrangement according to claim 1, characterized in that wherein the mounting space of the first bearing and the oil collecting cavity of the oil collecting disc are in communication with the corresponding oil channels respectively.

3. The planetary row lubrication arrangement according to claim 2, characterized in that The application further comprises an oil pump, the oil pump is arranged in the reduction gearbox and close to the oil storage cavity; the oil channels comprise a first oil channel, the oil pump is in communication with the oil storage cavity through the first oil channel.

4. The planetary row lubrication arrangement according to claim 3, characterized in that The oil storage cavity is arranged at the bottom of the reduction gearbox, an oil filter and a magnet are arranged in the wall of the reduction gearbox, the oil filter and the magnet are arranged in the first oil channel.

5. The planetary row lubrication arrangement according to any one of claims 1 - 4, characterized in that, The first oil channel has two openings in communication with the outside, a plug is arranged in each of the two openings, the oil filter and the magnet are arranged close to the two openings respectively.

6. The planetary row lubrication arrangement according to claim 5, characterized in that The reduction gearbox comprises a reduction gearbox body and an end cover, the oil channels comprise a second oil channel arranged in the reduction gearbox body and a third oil channel arranged in the end cover; the second oil channel is in communication with the oil collecting cavity of the oil collecting disc; the third oil channel is in communication with the mounting space of the first bearing. The planet carrier is provided with an output shaft, the first bearing is arranged between the output shaft and the end cover; 7. The planetary row lubrication arrangement according to claim 6, characterized in that The oil collecting disc is annular and is arranged on the end of the planet carrier away from the output shaft. The sun gear of the planetary gear train and the planet carrier are provided with a third bearing and a fourth bearing; 8. The planetary row lubrication arrangement according to any one of claims 1 - 4, characterized in that The end of the planet carrier away from the output shaft is provided with a convex edge protruding in the axial direction, the oil collecting disc is arranged outside the convex edge, and the fourth bearing is embedded inside the convex edge. The motor is an axial flux motor; the reduction gearbox is connected with the end opening of the motor housing and is close to the rotor assembly; An oil seal is arranged between the reduction gearbox and the rotating disc of the rotor assembly; the sun gear is provided with an input shaft, and the input shaft is in key connection with the rotor shaft of the motor.

9. A vehicle characterized by comprising: A planetary row lubrication arrangement comprising the features of any one of claims 1-8.

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