Planet row lubricating structure and vehicle

Abstract

The invention discloses a planet row lubricating structure and a vehicle. The planet row lubricating structure comprises a reduction gearbox, a planet row and an oil collecting tray. The reduction gearbox is provided with a reducer mounting cavity and an oil storage cavity which are communicated. The planet row is positioned in the speed reducer mounting cavity; a first bearing is arranged between the planet row and the reduction gearbox; a planet wheel shaft of the planet row is provided with an oil guide cavity and an oil guide hole which are communicated; a planetary gear of the planetary row is installed on the planetary gear shaft through a second bearing, and the second bearing corresponds to the oil guide hole in position. The oil collecting disc is connected with a planet carrier of the planet row and provided with oil outlet nozzles with the same number as the planet wheel shafts, and the oil outlet nozzles extend into the corresponding oil guide cavities so as to communicate the oil guide cavities with oil collecting cavities of the oil collecting disc. A plurality of oil channels are formed in the box wall of the reduction gearbox, and the installation space of the first bearing and the oil collecting cavity of the oil collecting disc are communicated with the corresponding oil channels respectively. The planet row is actively sprayed with oil for lubrication through the oil collecting disc, and the cooling effect is good. No oil pipe needs to be arranged outside the reduction gearbox, and the reduction gearbox is more compact in structure.

Description

Technical Field

[0001] The present application belongs to the technical field of planetary gear lubrication structures, and in particular, relates to a planetary gear lubrication structure and a vehicle. Background Art

[0002] In the related art, planetary gear reducers mostly adopt the gear oil stirring passive lubrication cooling method. However, the gear oil stirring lubrication has large oil stirring loss and low cooling efficiency. Summary of the invention

[0003] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes a planetary gear lubrication structure and a vehicle, which actively sprays oil to lubricate the planetary gear by arranging an oil collecting pan.

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

[0005] A reduction box is provided with a reducer installation cavity and an oil storage cavity which are connected, and a plurality of oil channels are provided in the wall of the reduction box;

[0006] A planetary gear is located in the reducer installation cavity, and a first bearing is provided between the planetary gear and the reduction box; the planetary gear shaft of the planetary gear is provided with a communicating oil guide cavity and an oil guide hole; the planetary gear of the planetary gear is installed on the planetary gear shaft through a second bearing, and the second bearing corresponds to the position of the oil guide hole;

[0007] An oil collecting pan connected to the planet carrier of the planetary gear; provided with the same number of oil outlet nozzles as the number of the planetary gear shafts, the oil outlet nozzles extending into the corresponding oil guide chambers to connect the oil guide chambers with the oil collecting chamber of the oil collecting pan;

[0008] Wherein, the installation space of the first bearing and the oil collecting cavity of the oil collecting pan are respectively communicated with the corresponding oil passages.

[0009] In some embodiments, an oil pump is further included, which is installed on the reduction gearbox and close to the oil storage chamber; the oil passage includes a first oil passage, and the oil pump is connected to the oil storage chamber through the first oil passage.

[0010] In some embodiments, the oil storage chamber is disposed at the bottom of the reduction gear box, an oil filter and a magnet are disposed in a wall of the reduction gear box, and the oil filter and the magnet are both disposed in the first oil channel.

[0011] In some embodiments, the first oil passage has two openings communicating with the outside, plugs are provided in the two openings, and the oil filter and the magnet are respectively close to the two openings.

[0012] In some embodiments, the reducer includes a connected reducer housing and an end cover, and the oil passage includes a second oil passage provided in the reducer housing and a third oil passage provided in the end cover; the second oil passage is connected to the oil collecting chamber of the oil collecting pan; the third oil passage is connected to the installation space of the first bearing.

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

[0014] In some embodiments, the oil collecting pan is annular and is sleeved on an end of the planet carrier away from the output shaft.

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

[0016] In some embodiments, an end of the planet carrier away from the output shaft is provided with an axially protruding lip, the oil collecting pan is sleeved on the outer side of the lip, and the fourth bearing is embedded in the inner side of the lip.

[0017] In some embodiments, the planetary gear lubrication structure further comprises:

[0018] A motor housing connected to the reduction box, wherein a plurality of oil passages are arranged in the housing wall of the motor housing;

[0019] A motor is 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 both located in a stator mounting cavity of the stator housing, and the stator housing is provided with an oil inlet hole and an oil outlet hole communicating with the stator mounting cavity;

[0020] An oil cooler is installed on the motor housing, the oil inlet of the oil cooler is connected to the oil pump through the oil passage of the reduction box, and the oil outlet of the oil cooler is connected to the oil inlet hole through the oil passage of the motor housing;

[0021] Wherein, the rotor assembly of the motor is drivingly connected to the sun gear of the planetary gearbox; and the oil outlet is connected to the oil passage of the reduction box.

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

[0023] In some embodiments, an oil seal is provided between the reduction box and the rotating disk of the rotor assembly; the sun gear is provided with an input shaft, and the input shaft is key-connected with the rotor shaft of the motor.

[0024] In a second aspect of the present application, a vehicle is provided, comprising the above-mentioned planetary gear lubrication structure.

[0025] According to one or more embodiments of the present application, a planetary gear lubrication structure is provided, including a reduction box, a planetary gear and an oil collecting plate. The reduction box is provided with a connected reducer installation cavity and an oil storage cavity. The planetary gear is located in the reducer installation cavity, and a first bearing is provided between the planetary gear and the reduction box; the planetary gear shaft of the planetary gear is provided with a connected oil guide cavity and an oil guide hole; the planetary gear of the planetary gear is installed on the planetary gear shaft through a second bearing, and the second bearing corresponds to the position of the oil guide hole. The oil collecting plate is connected to the planetary carrier of the planetary gear, and the oil collecting plate is provided with the same number of oil outlet nozzles as the planetary gear shaft, and the oil outlet nozzles extend into the corresponding oil guide cavity to connect the oil guide cavity and the oil collecting cavity of the oil collecting plate. A plurality of oil channels are provided in the box wall of the reduction box, and the installation space of the first bearing and the oil collecting cavity of the oil collecting plate are respectively connected with the corresponding oil channels. The planetary gear is actively sprayed and lubricated by the oil collecting plate, and the cooling effect is good. The lubricating oil is transported from the box wall of the reduction box to the oil collecting plate and the bearings of the planetary carrier, and the bearings of the planetary carrier do not need to be additionally provided with an oil guide structure, and the oil pipe does not need to be provided outside the reduction box, and the reduction box structure is more compact. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following is a brief introduction to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

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

[0028] Figure 2 Shows Figure 1 Schematic diagram of the oil collecting pan of the planetary gearbox lubrication structure Figure 1 .

[0029] Figure 3 Shows Figure 1 Schematic diagram of the oil collecting pan of the planetary gearbox lubrication structure Figure 2 .

[0030] Figure 4 Shows 2 and Figure 3 Full cutaway of the oil pan Figure 1 .

[0031] Figure 5 Shows 2 and Figure 3 Full cutaway of the oil pan Figure 2 .

[0032] Figure 6 Schematic diagrams of the structure of the planetary gear lubrication structure in other embodiments are shown.

[0033] Figure 7 Shows Figure 6 A full cross-section of the planetary gear lubrication structure.

[0034] Figure 8 Shows Figure 6 Schematic diagram of the oil circuit structure of the planetary gear lubrication structure Figure 1 .

[0035] Fig. 9 Shows Figure 6 Schematic diagram of the oil circuit structure of the planetary gear lubrication structure Figure 2 .

[0036] Fig.10 Shows Figure 6 Schematic diagram of the oil circuit structure of the planetary gear lubrication structure Figure 3 .

[0037] Fig.11 Shows Figure 6 Schematic diagram of the oil circuit structure of the planetary gear lubrication structure Figure 4 .

[0038] Fig.12 Shows Figure 6 Schematic diagram of the oil circuit structure of the planetary gear lubrication structure Figure 5 .

[0039] Fig.13 Shows Figure 6 Structural block diagram of the cooling and lubrication circuit of the planetary gear lubrication structure.

[0040] Description 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 passage, 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 passage, 213-fifth oil channel, 214-sixth oil channel; 220-reduction gearbox, 220a-reduction gearbox mounting cavity; 221-reduction gearbox 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 block; 412-planet carrier, 4121-output shaft, 4122-convex edge; 413-planetary gear; 414-planetary gear shaft, 414a-oil guide chamber, 414b-oil guide hole; 415-gear ring; 420-first bearing; 430-second bearing; 440-third bearing; 450-oil collecting pan, 450a-oil collecting chamber, 451-oil outlet nozzle, 452-oil baffle plate, 453-avoidance area, 454-installation hole. 500-oil pump; 600-oil cooler; 700-rotor; 801-first oil seal; 802-second oil seal. DETAILED DESCRIPTION

[0041] In order to make the technical personnel in the technical field to which the present application belongs to understand the present application more clearly, the technical scheme in the embodiments of the present application will be clearly and completely described 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, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0042] In addition, the present application may repeat reference numbers and / or reference letters in different examples, and such repetition is for the purpose of simplicity and clarity, and does not in itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present application provides various specific examples of processes and materials, but those of ordinary skill in the art may recognize the application of other processes and / or the use of other materials.

[0043] The specific technical solutions of the present application are described in detail below in conjunction with the accompanying drawings that are not necessarily drawn to scale. Among them, similar or identical reference numerals may be used to designate the same or similar parts in different figures. The use of similar or identical reference numerals in different figures does not mean that all figures including similar or identical reference numerals constitute a single or the same embodiment. The accompanying drawings generally illustrate various embodiments discussed in the present application by way of example and not limitation.

[0044] See also Figure 1 In the first aspect of the present application, a planetary gear lubrication structure is provided, including a reduction gearbox 220, a planetary gearbox 410 and an oil collecting pan 450. The reduction gearbox 220 is provided with a reducer installation cavity 220a and an oil storage cavity (not shown in the figure) that are connected. The planetary gearbox 410 is located in the reducer installation cavity 220a, and a first bearing 420 is provided between the planetary gearbox 410 and the reduction gearbox 220; the planetary gear shaft 414 of the planetary gearbox 410 is provided with a connected oil guide cavity 414a and an oil guide hole 414b; the planetary gear 413 of the planetary gearbox 410 is installed on the planetary gear shaft 414 through a second bearing 430, and the second bearing 430 corresponds to the position of the oil guide hole 414b.

[0045] The planetary gear shaft 414 of the planetary gear row 410 is provided with a connected oil guide cavity 414a and an oil guide hole 414b; the planetary gear 413 of the planetary gear row 410 is installed on the planetary gear shaft 414 through the second bearing 430, and the second bearing 430 corresponds to the position of the oil guide hole 414b. The oil collecting plate 450 is connected to the planetary carrier 412 of the planetary gear row 410, and the oil collecting plate 450 is provided with the same number of oil outlet nozzles 451 as the planetary gear shaft 414, and the oil outlet nozzles 451 extend into the corresponding oil guide cavity 414a to connect the oil guide cavity 414a and the oil collecting cavity 450a of the oil collecting plate 450. A plurality of oil passages are provided in the box wall of the reduction box 220, and the installation space of the first bearing 420 and the oil collecting cavity 450a of the oil collecting plate 450 are respectively connected to the corresponding oil passages. The planetary gear row 410 is actively sprayed with oil for lubrication through the oil collecting plate 450, and the cooling effect is good. The lubricating oil is transported from the wall of the reduction box 220 to the oil collecting pan 450 and the bearings of the planetary carrier 412. The bearings of the planetary carrier 412 do not need to be additionally provided with an oil guide structure, and no oil pipes are required outside the reduction box 220, so the reduction box 220 has a more compact structure.

[0046] The lubricating oil of the planetary gear 410 can be pumped into the oil channel by an oil pump, and then enter the reducer installation cavity 220a. The oil pump can be installed on the reduction box 220, or other oil pumps of the vehicle equipped with the planetary gear lubrication structure can provide oil for the planetary gear lubrication structure. This application is not limited.

[0047] See also Figure 1In some embodiments, the planetary gear 413 of the planetary row 410 is mounted on the planetary gear shaft 414 through two symmetrically arranged second bearings 430. The second bearing 430 adopts a tapered roller bearing and can withstand a certain axial force. The oil guide hole 414b is connected to the gap between the two tapered roller bearings. The oil enters the second bearing 430 through the gap between the two tapered roller bearings, lubricates the second bearing 430 and then flows out, and then lubricates the meshing part between the planetary gear 413 and the ring gear 415 and the sun gear 411, as well as the third bearing 440 and the fourth bearing 460 between the sun gear 411 and the planet carrier 412. The oil then drips under the action of gravity and falls into the oil storage chamber. The oil storage chamber can be formed by the bottom part of the reducer installation chamber 220a, or it can be an oil pan additionally arranged at the bottom of the reducer installation chamber 220a, and this application does not limit it.

[0048] To prevent oil leakage, several oil seals are provided at the connection between the planetary gear 410 and the reduction gearbox 220. Figure 1 In some embodiments, the sun gear 411 of the planetary gear row 410 is provided with an input shaft 4111, the planetary carrier 412 of the planetary gear row 410 is provided with an output shaft 4121, and a first bearing 420 is provided between the output shaft 4121 and the reduction box 220. In other words, the planetary gear row 410 adopts a structure in which the sun gear 411 is input and the planetary carrier 412 is output. Accordingly, a first oil seal 801 is provided between the input shaft 4111 and the reduction box 220. A second oil seal 802 is provided between the output shaft 4121 and the reduction box 220, and the second oil seal 802 is located outside the first bearing 420.

[0049] See also Figure 1 In some embodiments, the reduction gearbox 220 includes a reduction gearbox housing 221 and an end cover 222 connected thereto, a first oil seal 801 is installed between the reduction gearbox housing 221 and the input shaft 4111 , and a second oil seal 802 is installed between the end cover 222 and the output shaft 4121 .

[0050] See also Figure 2 and Figure 3 , shows a schematic diagram of the structure of the oil collecting pan 450 in some embodiments. The oil collecting pan 450 is annular and is sleeved on one end of the planet carrier 412 away from the output shaft 4121, and rotates together with the planet carrier 412. The oil collecting pan 450 is provided with the same number of oil outlet nozzles 451 as the number of the planetary gear shafts 414 of the planetary row 410, and the lubricating oil is input into the oil collecting pan 450, and the lubricating oil can flow out through each oil outlet nozzle 451 to each planetary gear 413 and the corresponding bearing.

[0051] See also Figure 4In some embodiments, the oil collecting pan 450 is provided with a plurality of oil baffles 452, the number of the oil baffles 452 is the same as the number of the oil outlet nozzles 451, and the root of each oil baffle 452 is respectively close to the corresponding oil outlet nozzle 451. By providing the oil baffles 452, the oil can be gathered at the root of the oil baffles 452 in the rotating oil collecting pan 450, so that the oil can enter the oil outlet nozzle 451.

[0052] See also Figure 4 In some embodiments, the oil baffle plate 452 is arranged to be inclined relative to the radial direction of the oil collecting pan 450. Along the rotation direction of the oil collecting pan 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. Figure 4 When the oil pan 450 rotates in the direction indicated by the middle arrow, the oil will rotate relative to the oil pan 450 due to inertia. It can be understood that the oil pan 450 and the oil are both rotating along the Figure 4 When rotating in the direction indicated by the middle arrow, the rotation speed of the oil collecting pan 450 is faster than the oil, and the oil will gradually gather at the root of the oil baffle plate 452, 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] See also Figure 5 In some embodiments, the oil collecting pan 450 is mounted on the planetary carrier 412 by screws. In order to facilitate the installation of the screws, a plurality of avoidance areas 453 are provided on the side panel of the oil collecting pan 450 on the side away from the oil outlet nozzle 451, and a plurality of mounting holes 454 are provided on the side panel of the oil collecting pan 450 on the side where the oil outlet nozzle 451 is located. Each avoidance area 453 corresponds to each mounting hole 454 one by one. During installation, a sleeve can be set in the avoidance area 453, and the screws can be installed through the internal space of the sleeve to prevent the screws from accidentally falling into the oil collecting chamber 450a.

[0054] The planetary gear lubrication structure can be applied to any power system in the prior art. For example, the planetary gear of the planetary gear lubrication structure can be used as a reducer of an engine or a reducer of a motor. Therefore, the planetary gear lubrication structure can be applied to oil vehicles, pure electric vehicles or hybrid vehicles.

[0055] The lubricating oil can be input into the oil collecting pan 450 through an externally arranged oil pipe, or the lubricating oil can be transported by opening an oil channel in the box wall of the housing assembly 200. Furthermore, when the planetary gear lubrication 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, that is, the oil first enters the stator assembly to cool the stator assembly, and then is transported to the oil collecting pan 450 through the oil channel opened in the box wall of the housing. After the oil lubricates the planetary gear 410, it finally falls into the reducer installation cavity 220a. The oil pump is connected to the reducer installation cavity 220a, and the oil falling in the reducer installation cavity 220a is pumped to the stator assembly 110.

[0056] See also Figure 6 , shows a schematic diagram of the structure of a planetary gear lubrication structure in some embodiments, which includes, in addition to all the contents described above, a housing assembly 200, a controller 300 and at least two axial flux motors 100. The planetary gear 410 is transmission-connected to the axial flux motor 100, and is used to output the power output by the axial flux motor 100 to the outside after deceleration. It can be connected to the housing assembly 200, and the planetary gear 410 can also be installed inside the housing assembly 200.

[0057] The controller 300 is electrically connected to the axial flux motor 100. On the one hand, it provides three-phase current to the stator assembly of the axial flux motor 100. On the other hand, it communicates data with the vehicle controller 300 to control the working condition of the axial flux motor 100 and feedback the working parameters of the axial flux motor 100. The controller 300 is connected to the housing assembly 200. The controller 300 can be an independent part connected to 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] In order to meet the cooling requirements of the stator assembly 110 in the axial flux motor 100, in some embodiments, the planetary gear lubrication structure also 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 housing 111 are respectively connected. The oil pump pumps the 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 by air cooling or water cooling, which is not limited in this application. The oil inlet of the oil cooler 600 is connected to the oil pump 500, and the oil outlet of the oil cooler 600 is connected to the oil inlet hole 111b of the stator assembly 110.

[0059] The planetary gear lubrication structure can be a single motor system or a dual motor system. Figure 7In some embodiments, the planetary gear lubrication structure adopts a dual motor system, that is, two axial flux motors 100 are provided. The two axial flux motors 100 are arranged side by side along the axial direction with the second rotor assemblies 120b close to each other. Then the planetary gear lubrication structure includes two reducers 400, which are respectively connected to the two axial flux motors 100 for outputting the power output by the two axial flux motors 100 after deceleration.

[0060] See also Figure 6 and Fig.11 , shows a schematic diagram and a full cross-sectional view of a planetary row lubrication structure in some embodiments, wherein the planetary row lubrication structure is configured with two axial flux motors 100 and two single planetary 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, and the two axial flux motors 100 are arranged side by side in the motor mounting cavity 210a along the axial direction of the axial flux motor 100. The two planetary rows 410 are located in the reducer mounting cavity 220a and are symmetrically distributed on the outside of the two axial flux motors 100, so that the planetary row lubrication structure is substantially symmetrical. The two planetary rows 410 are respectively connected to the rotor assemblies of the two axial flux motors 100 in a transmission manner, and are used to output the power output by the two axial flux motors 100 to the outside after deceleration and torque increase.

[0061] See also Figure 7 In some embodiments, the housing assembly 200 includes a motor housing 210, a controller housing 230 and two reduction gearboxes 220, the two reduction gearboxes 220 are respectively connected to the openings at both ends of the motor housing 210 and are close to the rotor assembly. The reduction gearbox 220 and the motor housing 210 together form a motor installation cavity 210a, the inner cavity of the controller housing 230 forms a controller installation cavity 230a, and the inner cavity of the reduction gearbox 220 forms a reducer installation cavity 220a. An oil storage cavity is provided inside the reduction gearbox 220, and the oil storage cavity is connected to the reducer installation cavity 220a. The oil dripped from the various components installed in the reducer installation cavity 220a is gathered in the oil storage cavity. Along the axial direction of the axial flux motor 100, the motor housing 210 and the two reduction gearboxes 220 share the same box wall, which can significantly reduce the axial size of the planetary gear lubrication structure.

[0062] In some embodiments, the motor housing 210 and the main body 231 of the controller housing 230 are an integrated structure, that is, one of the chambers of the motor housing 210 is used as the motor installation chamber 210a, and the other chamber is used as the controller installation chamber 230a. The cover plate 232 of the controller housing 230 is connected to the motor housing 210 to seal the controller installation chamber 230a. The integration of the motor housing 210 and the controller housing 230 can significantly reduce the size of the planetary gear lubrication structure in the direction perpendicular to the axial direction.

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

[0064] Since the spline fitting of 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 Fig.12 In some embodiments, a shoulder is provided on the inner wall of the rotor shaft 121, and a support stopper 4112 is provided on the input shaft 4111. When the input shaft 4111 moves axially until the support stopper 4112 abuts against the shoulder and is axially limited, the spline groove 1214 of the rotor shaft 121 is stably engaged with the external spline of the input shaft 4111, and the end of the input shaft 4111 will not interfere with the cavity wall of the rotor shaft 121. In addition, the support stopper 4112 is slidably matched with the inner wall of the rotor shaft 121, and can also play a role in guiding and ensuring the coaxiality of the sun gear 411 and the rotor shaft 121.

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

[0066] In the planetary gear 410, the sun gear 411 and the input shaft 4111 can be an integrated structure, and the sun gear 411 and the input shaft 4111 can also be connected by a key, bolt, etc., which is not limited in this 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 allow lubricating oil to enter, thereby lubricating the meshing part between the spline groove 1214 of the rotor shaft 121 and the external spline of the input shaft 4111, and the matching part between the support stop 4112 of the input shaft 4111 and the inner wall of the rotor shaft 121. In order to prevent the lubricating oil from entering the motor installation cavity 210a, a first oil seal 801 is provided between the reduction box 220 and the turntable of the rotor assembly close to it.

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

[0068] See also Figure 7 and Fig.12 In some embodiments, the reduction box 220 includes a reduction box body 221 and an end cover 222 connected to each other, the reduction box body 221 is connected to the motor housing 210, and an oil seal is installed between the reduction box body 221 and the first mounting portion 1222. The planetary carrier 412 of the planetary row 410 is provided with an output shaft 4121, and a first bearing 420 is provided between the output shaft 4121 and the end cover 222. To prevent leakage of lubricating oil, a second oil seal 802 is provided between the output shaft 4121 and the end cover 222.

[0069] The lubricating oil can be input into the oil collecting pan 450 through an externally arranged oil pipe, or the lubricating oil can be transported by opening an oil passage in the box wall of the housing assembly 200. Furthermore, the cooling oil of the stator assembly 110 of the axial flux motor 100 can be mixed with the lubricating oil of the planetary gear 410, that is, the oil first enters the stator assembly 110 to cool the stator assembly 110, and then is transported to the oil collecting pan 450 through the oil passage 220c opened in the box wall of the housing assembly 200. The oil lubricates the planetary gear 410 and finally falls into the reducer installation cavity 220a. The oil pump 500 is connected to the reducer installation cavity 220a, and the oil falling into the reducer installation cavity 220a is pumped to the stator assembly 110.

[0070] See also Figures 8 to 12 The oil passages opened in the box wall of the housing assembly 200 include a first oil passage 2221 and a second oil passage 2211. The oil pump 500 is connected to the oil storage chamber through the first oil passage 2221, and the oil collecting chamber 450a of the oil collecting pan 450 is connected to the second oil passage 2211. Figures 8 to 12 The oil passages opened in the casing wall of the housing assembly 200 further include a third oil passage 2222, a fourth oil passage 212, a fifth oil passage 213 and a sixth oil passage 214. The third oil passage 2222 is communicated with the installation space of the first bearing 420; the oil cooler 600 is communicated with the oil pump 500 through the fourth oil passage 212. The oil cooler 600 is communicated with the oil inlet hole 111b of the stator casing 111 through the fifth oil passage 213, and the oil outlet hole 111c of the stator casing 111 is communicated with both the second oil passage 2211 and the third oil passage 2222 through the sixth oil passage 214.

[0071] In some embodiments, the housing assembly 200 includes a motor housing 210, a reduction box 220, and a controller housing 230. The reduction box 220 includes a connected reducer housing 221 and an end cover 222. The reduction box 220 is connected to the end opening of the motor housing 210 and is close to the first rotor assembly 120a. The first oil passage 2221 and the third oil passage 2222 are both provided in the end cover 222, the second oil passage 2211 is provided in the reducer housing 221, the fourth oil passage 212 and the sixth oil passage 214 are both provided in the motor housing 210 and the reducer housing 221, and the fifth oil passage 213 is provided in the motor housing 210.

[0072] See also Figure 8In some embodiments, an oil filter 2225 and a magnet 2226 are provided in the wall of the reduction box 220, and the oil filter 2225 and the magnet 2226 are both provided in the first oil passage 2221; the first oil passage 2221 has two openings 2223 communicating with the outside, and plugs 2224 are provided in the two openings 2223, and the oil filter 2225 and the magnet 2226 are respectively close to the two openings 2223. After the planetary gear lubrication structure has been running for a period of time, the oil filter 2225 and the magnet 2226 need to be cleaned or replaced, and the corresponding opening 2223 can be opened through the plug 2224, and the oil filter 2225 or the magnet 2226 in the opening 2223 can be removed for cleaning or replacement.

[0073] The second aspect of the present application provides a vehicle, which includes a planetary gear lubrication structure according to any one of the first aspects. The vehicle may be a pure electric vehicle or a hybrid vehicle, which is not limited by the present application.

[0074] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0075] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise" and "counterclockwise" indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not 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 status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0077] In this application, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0078] In addition, the descriptions of "first", "second", etc. in this application are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0079] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification.

[0080] In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

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

Claims

1. A planetary gear lubrication structure, characterized in that: include: A reduction box is provided with a reducer installation cavity and an oil storage cavity which are connected, and a plurality of oil channels are provided in the wall of the reduction box; A planetary gear is located in the reducer installation cavity, and a first bearing is provided between the planetary gear and the reduction box; the planetary gear shaft of the planetary gear is provided with a communicating oil guide cavity and an oil guide hole; the planetary gear of the planetary gear is installed on the planetary gear shaft through a second bearing, and the second bearing corresponds to the position of the oil guide hole; An oil collecting pan connected to the planet carrier of the planetary gear; provided with the same number of oil outlet nozzles as the number of the planetary gear shafts, the oil outlet nozzles extending into the corresponding oil guide chambers to connect the oil guide chambers with the oil collecting chamber of the oil collecting pan; Wherein, the installation space of the first bearing and the oil collecting cavity of the oil collecting pan are respectively communicated with the corresponding oil passages.

2. The planetary gear lubrication structure according to claim 1, characterized in that: It also includes an oil pump, which is installed on the reduction box and close to the oil storage chamber; the oil channel includes a first oil channel, and the oil pump is connected to the oil storage chamber through the first oil channel.

3. The planetary gear lubrication structure according to claim 2, characterized in that: The oil storage chamber is arranged at the bottom of the reduction box, an oil filter and a magnet are arranged in the box wall of the reduction box, and the oil filter and the magnet are both arranged in the first oil channel.

4. The planetary gear lubrication structure according to claim 3, characterized in that: The first oil passage has two openings communicating with the outside, plugs are provided in the two openings, and the oil filter and the magnet are respectively close to the two openings.

5. The planetary gear lubrication structure according to any one of claims 1 to 4, characterized in that: The reduction gearbox includes a connected reducer housing and an end cover, and the oil passage includes a second oil passage arranged in the reducer housing and a third oil passage arranged in the end cover; the second oil passage is connected to the oil collecting chamber of the oil collecting pan; the third oil passage is connected to the installation space of the first bearing.

6. The planetary gear lubrication structure according to claim 5, characterized in that: The planet carrier is provided with an output shaft, and the first bearing is provided between the output shaft and the end cover; The oil collecting pan is annular and sleeved on an end of the planet carrier away from the output shaft.

7. The planetary gear lubrication structure according to claim 6, characterized in that: A third bearing and a fourth bearing are provided between the sun gear of the planetary row and the planet carrier; An end of the planet carrier away from the output shaft is provided with a convex edge protruding along the axial direction, the oil collecting pan is sleeved on the outer side of the convex edge, and the fourth bearing is embedded in the inner side of the convex edge.

8. The planetary gear lubrication structure according to any one of claims 1 to 4, characterized in that: Also includes: A motor housing connected to the reduction box, wherein a plurality of oil passages are arranged in the housing wall of the motor housing; A motor is 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 both located in a stator mounting cavity of the stator housing, and the stator housing is provided with an oil inlet hole and an oil outlet hole communicating with the stator mounting cavity; An oil cooler is installed on the motor housing, the oil inlet of the oil cooler is connected to the oil pump through the oil passage of the reduction box, and the oil outlet of the oil cooler is connected to the oil inlet hole through the oil passage of the motor housing; Wherein, the rotor assembly of the motor is drivingly connected to the sun gear of the planetary gearbox; and the oil outlet is connected to the oil passage of the reduction box.

9. The planetary gear lubrication structure according to claim 8, characterized in that: The motor is an axial flux motor; the reduction box is connected to the end opening of the motor housing and is close to the rotor assembly; An oil seal is provided between the reduction box and the rotating disk of the rotor assembly; the sun gear is provided with an input shaft, and the input shaft is key-connected with the rotor shaft of the motor.

10. A vehicle, characterized in that: The invention comprises the planetary gear lubrication structure according to any one of claims 1 to 9.

Images