Integrated structure of planetary reducer and differential mechanism and vehicle

Abstract

The utility model provides an integrated structure of planetary reducer and differential mechanism and vehicle, wherein the integrated structure includes: planet carrier, planet carrier includes first side wall and two end wall, first side wall is provided with a plurality of planet wheel mounting groove, forms the support part between adjacent planet wheel mounting groove, one end wall is provided with mounting recess, and the two end wall is provided with the mounting recess. An opening is formed in the mounting concave part, the mounting concave part comprises a second side wall, and the second side wall is located on the inner side of the planet wheel mounting groove; the sun gear is arranged in the planet carrier, and the planet gears are arranged in the planet gear mounting grooves in a one-to-one correspondence mode; the differential gear set is arranged in the mounting concave part; and an end cover. According to the structure, the differential gear set is integrated in the planet carrier, a differential shell in the prior art is omitted, meanwhile, the space among the planet wheels is utilized, the axial integration degree of the planet wheels and the differential gear set is higher, and the axial space occupied by the planetary reducer and the differential is greatly reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to vehicle drive system technical field, concretely relates to a kind of integrated structure of planetary reducer and differential and vehicle. BACKGROUND

[0002] Coaxial electric drive system is an important component of new energy electric vehicle, its structure is roughly as follows: the rotor shaft of motor is connected to the sun gear of reducer, is driven to rotate by planetary gear train after reduction, and is driven to rotate by planet carrier by planetary gear.The differential is connected with the planet carrier, and two half shaft gears and planetary bevel gears are arranged in the differential.The two half shaft gears are connected with two through shafts respectively, and the two through shafts are connected with left and right wheels respectively.When the vehicle is running, the rotor shaft drives the differential to rotate through the reducer, and the differential rotates to transmit power to the two wheels.When the vehicle turns, the gears in the differential rotate relatively to compensate the speed difference between the two gears.

[0003] The differential in the prior art is a total assembly, which includes a left shell and a right shell. The left and right shells enclose a receiving cavity and are used to arrange the half shaft gears and the planetary bevel gears. The left shell or the right shell is connected to the planet carrier by bolts. In the above structure, the two shells have a large thickness, so they occupy a large axial space of the vehicle wheels, which is not conducive to the short wheelbase design and miniaturization design of the vehicle. SUMMARY

[0004] Therefore, the utility model wants to overcome the defect that the thickness of the differential shell of the vehicle in the prior art is large, which is not conducive to the short wheelbase design and miniaturization design of the vehicle, so as to provide an integrated structure of planetary reducer and differential and a vehicle.

[0005] To solve the above problems, the utility model provides an integrated structure of planetary reducer and differential, which comprises: a planet carrier, the planet carrier comprises a first side wall and two end walls, the first side wall is provided with a plurality of planet wheel mounting grooves, and a support part is formed between adjacent planet wheel mounting grooves, one of the end walls is provided with a mounting recess, the mounting recess forms an opening, the mounting recess comprises a second side wall, and the second side wall is located inside the planet wheel mounting groove; a sun gear and a plurality of planet wheels, the sun gear is arranged in the planet carrier, and the plurality of planet wheels are arranged one by one in the planet wheel mounting grooves; a differential gear set arranged in the mounting recess; and an end cover arranged at the opening of the mounting recess.

[0006] Optionally, the planet wheel comprises a first gear and a second gear connected coaxially, the planet wheel mounting groove comprises a first gear groove and a second gear groove in communication with each other, the first gear is arranged in the first gear groove, the second gear is arranged in the second gear groove, and the mounting recess is formed in the space enclosed inside the plurality of second gear grooves.

[0007] Optionally, an oil hole is provided on the second side wall, and the oil hole is connected to the second gear groove.

[0008] Optionally, the differential gear set includes a plurality of planetary bevel gears distributed along the circumferential direction and meshed in sequence, and two bevel half-shaft gears, the two bevel half-shaft gears are respectively located on both sides of the planetary bevel gears, and the bevel half-shaft gears are meshed with the planetary bevel gears, a rotating shaft hole is provided on the support part, and the integrated structure also includes a rotating shaft, which passes through the rotating shaft hole and is connected to the planetary bevel gears.

[0009] Optionally, a reinforcing rib is provided at a position of the end wall corresponding to the rotating shaft hole.

[0010] Optionally, a first through hole is provided on the bottom wall of the mounting recess, the bevel gear side gear comprises a tooth portion and a shaft portion, and the shaft portion of one of the bevel gear side gears passes through the first through hole.

[0011] Optionally, a second through hole is provided on the end cover, and the shaft portion of the other bevel gear half-shaft is passed through the second through hole.

[0012] Optionally, the differential gear set includes a plurality of planetary bevel gears distributed along the circumferential direction and meshed in sequence, and two bevel side gears, the two bevel side gears are respectively located on both sides of the planetary bevel gears, and the bevel side gears are meshed with the planetary bevel gears, wherein the number of planetary wheels is the same as the number of planetary bevel gears, or the number of planetary wheels is a positive integer multiple of the number of planetary bevel gears.

[0013] The utility model also provides a vehicle, comprising the integrated structure of the planetary reducer and the differential.

[0014] Optionally, the vehicle further includes an electric motor, the electric motor includes a rotor shaft, and the rotor shaft is connected to the sun gear.

[0015] The utility model has the following advantages:

[0016] Utilizing the technical solution of the present utility model, a mounting recess is provided on the planetary carrier, with the second sidewall of the mounting recess located inside the planetary gear mounting slots. During assembly, the differential gear set is installed in the mounting recess, which is then sealed with an end cap. This structure integrates the differential gear set within the planetary carrier, eliminating the differential housing used in prior art. It also utilizes the space between the multiple planetary gears, achieving a higher degree of axial integration between the planetary gears and the differential gear set, significantly reducing the axial space occupied by the planetary reducer and differential in the wheels. Therefore, the technical solution of the present utility model overcomes the drawback of prior art vehicles, where the differential housing is relatively thick, hindering the vehicle's short wheelbase and miniaturization design. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the drawings required to be used in the description of the specific embodiments or the prior art will be briefly introduced as follows. Obviously, the drawings described 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 on the basis of these drawings.

[0018] Figure 1 The structural schematic diagram of the integrated structure of the planetary reducer and the differential of the present application is shown.

[0019] Figure 2 The structural schematic diagram of the integrated structure of the present application is shown. Figure 1 The structural schematic diagram of the integrated structure of the present application is shown.

[0020] Figure 3 The structural schematic diagram of the integrated structure of the present application is shown. Figure 1 The structural schematic diagram of the planetary carrier of the integrated structure of the present application is shown.

[0021] Figure 4 The structural schematic diagram of the integrated structure of the present application is shown. Figure 3 The structural schematic diagram of the integrated structure of the present application is shown.

[0022] Figure 5 The structural schematic diagram of the integrated structure of the present application is shown. Figure 3 The structural schematic diagram of the integrated structure of the present application is shown.

[0023] Figure 6 The structural schematic diagram of the integrated structure of the present application is shown. Figure 1 The structural schematic diagram of the integrated structure of the present application is shown.

[0024] Figure 7 The structural schematic diagram of the integrated structure of the present application is shown. Figure 1 The structural schematic diagram of the integrated structure of the present application is shown.

[0025] Figure 8 The structural schematic diagram of the integrated structure of the present application is shown. Figure 1 The structural schematic diagram of the integrated structure of the present application is shown.

[0026] Figure 9 The structural schematic diagram of the integrated structure of the present application is shown. Figure 1 The structural schematic diagram of the integrated structure of the present application is shown.

[0027] Figure 10 The structural schematic diagram of the integrated structure of the present application is shown. Figure 9 The structural schematic diagram of the integrated structure of the present application is shown.

[0028] Figure 11 The structural schematic diagram of the integrated structure of the present application is shown. Figure 1 The structural schematic diagram of the integrated structure of the present application is shown.

[0029] Explanation of reference signs:

[0030] 10, planet carrier; 11, first side wall; 12, end wall; 13, planet wheel mounting slot; 131, first gear slot; 132, second gear slot; 14, support part; 141, rotation shaft hole; 142, reinforcing rib; 20, mounting recess; 21, opening; 22, second side wall; 221, oil passing hole; 23, first through hole; 30, sun gear; 40, planet wheel; 41, first gear; 42, second gear; 50, differential gear set; 51, planet bevel gear; 52, bevel pinion gear; 521, tooth part; 522, shaft part; 60, end cover; 61, second through hole; 70, rotation shaft; 100, motor; 101, rotor shaft. DETAILED DESCRIPTION

[0031] The technical solutions of the present application will be described clearly and completely below in conjunction with the drawings. Obviously, the described embodiments are only some 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 skilled in the art without creative work fall within the scope of the present application.

[0032] In the description of the present application, it should be noted that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0033] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or the communication inside two elements. For those skilled in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0034] In addition, the technical features involved in different embodiments of the present application described below can be combined with each other as long as there is no conflict.

[0035] For example, the first side wall 11 and the second side wall 22 can be combined into one side wall. Figures 1 to 11As shown, the embodiment of the integrated structure of the planetary reducer and the differential according to the application comprises a planet carrier 10, a sun gear 30, a plurality of planet gears 40, a differential gear set 50 and an end cover 60. The planet carrier 10 comprises a first side wall 11 and two end walls 12, the first side wall 11 is provided with a plurality of planet gear mounting grooves 13, and a support part 14 is formed between adjacent planet gear mounting grooves 13. One of the end walls 12 is provided with a mounting recess 20, the mounting recess 20 forms an opening 21, the mounting recess 20 comprises a second side wall 22, and the second side wall 22 is located inside the planet gear mounting groove 13. The sun gear 30 is arranged in the planet carrier 10, and the plurality of planet gears 40 are arranged in the planet gear mounting grooves 13 one by one. The differential gear set 50 is arranged in the mounting recess 20. The end cover 60 covers the opening 21 of the mounting recess 20.

[0036] By using the technical scheme of the embodiment, the mounting recess 20 is arranged on the planet carrier 10, and the second side wall of the mounting recess 20 is located inside the planet gear mounting groove 13. During assembly, the differential gear set 50 is arranged in the mounting recess 20, and then the mounting recess 20 is closed by the end cover 60. The above structure integrates the differential gear set 50 in the planet carrier 10, and eliminates the differential housing in the prior art. At the same time, the space between the plurality of planet gears 40 is utilized, so that the axial integration degree of the planet gears 40 and the differential gear set 50 is higher, and the space occupied by the planetary reducer and the differential in the wheel axial direction is greatly reduced. Therefore, the technical scheme of the embodiment solves the defect that the thickness of the housing of the differential of the vehicle in the prior art is large, which is not conducive to the short wheelbase design and miniaturization design of the vehicle.

[0037] Firstly, as shown in Figure 1 and Figure 7 , the planet carrier 10, the sun gear 30, the plurality of planet gears 40 and a ring gear (not shown in the figure) constitute a reducer assembly, which changes the transmission ratio and torque of the rotor shaft 101 of the motor 100. As can be seen from Figure 7 , the sun gear 30 is located in the middle position, and the plurality of planet gears 40 are arranged around the circumferential position of the sun gear 30. In the embodiment, the planet gears 40 are arranged as three. The plurality of planet gears 40 are engaged with the outer ring gear, and the outer ring gear is fixedly arranged. Therefore, when the rotor shaft 101 of the motor 100 rotates, the plurality of planet gears 40 rotate along their own axes on one hand, and rotate around the sun gear 30 on the other hand, that is, the reducer assembly in the embodiment is a NW planetary gear train.

[0038] In combination with Figure 3 and Figure 4It can be seen that the planet carrier 10 comprises two end walls 12 and a first side wall 11, one of the end walls 12 is arranged close to the motor 100, and the other end wall 12 is arranged away from the motor 100. Among them, the central position of the end wall close to the motor 100 is provided with a through hole, the sun gear 30 is arranged coaxially in the planet carrier 10, and the rotor shaft 101 can pass through the through hole and be connected with the sun gear 30.

[0039] Further, the first side wall 11 is provided with a planet wheel mounting groove 13, the planet wheel mounting groove 13 is a hollow structure, so that the outer side part of the planet wheel 40 can protrude from the first side wall 11 after the planet wheel 40 is mounted in the planet wheel mounting groove 13, thereby enabling the planet wheel 40 to mesh with the ring gear. The number of planet wheel mounting grooves 13 is consistent with the number of planet wheels 40, and in the embodiment, the planet wheel 40 is three, so the number of planet wheel mounting grooves 13 is also three.

[0040] Further, from Figures 3 to 5 It can be seen that on the first side wall 11, the part between the adjacent planet wheel mounting grooves 13 forms a support part 14, the support part 14 supports the two end walls 12, so that the planet carrier 10 maintains its shape.

[0041] From Figure 3 And Figure 4 It can be seen that the end wall 12 away from the motor 100 is provided with a mounting recess 20, the mounting recess 20 is recessed towards the inside of the planet carrier 10, and the mounting recess 20 is used to mount the differential gear set 50. After assembly, the end cover 60 is covered and fixed at the opening 21 of the mounting recess 20, so as to fix the differential gear set 50 in the mounting recess 20.

[0042] Through the above structure, on the one hand, the differential gear set 50 is integrated in the planet carrier 10, and the differential housing structure in the prior art is omitted, on the other hand, the space between the planet wheels 40 is utilized, so that the axial integration degree of the planet wheel 4 and the differential gear set 5 is higher, which greatly reduces the space occupied by the planetary reducer and the differential in the wheel axial direction, and is beneficial to the miniaturization design and short wheelbase design of the vehicle.

[0043] As Figures 3 to 5 And Figure 7 It can be seen that in the technical scheme of the embodiment, the planet wheel 40 comprises a first gear 41 and a second gear 42 connected coaxially, the diameter of the first gear 41 is greater than the diameter of the second gear 42. The planet wheel mounting groove 13 comprises a first gear groove 131 and a second gear groove 132 which are communicated with each other, the first gear 41 is arranged in the first gear groove 131, the second gear 42 is arranged in the second gear groove 132, and the mounting recess 20 is formed in the space surrounded by the inboard of the plurality of second gear grooves 132.

[0044] Specifically, each planetary gear 40 comprises coaxial and integral first gear 41 and second gear 42, the outer diameter of first gear 41 is larger than that of second gear 42, that is, first gear 41 is a large gear, and second gear 42 is a small gear. Wherein, first gear 41 is engaged with sun gear 30, and second gear 42 is engaged with ring gear, so as to realize two-stage transformation of transmission ratio and torque.

[0045] From Figure 4 It can be seen that the planetary gear mounting groove 13 comprises first gear groove 131 and second gear groove 132, the two groove bodies are distributed along the axial direction and are interconnected, and the first gear groove 131 is larger than the second gear groove 132. From Figure 1 It can be seen that the first gear 41 is accommodated in the first gear groove 131, and the second gear 42 is accommodated in the second gear groove 132.

[0046] In combination Figure 7 It can be understood by those skilled in the art that in the embodiment, since the first gears 41 of the three planetary gears 40 are engaged with the sun gear 30, the three first gears 41 and the sun gear 30 almost fill the plane. However, from Figure 7 It can be seen that there is a large space between the three second gears 42, so the scheme of the embodiment further utilizes the space between the three second gears 42 when integrating the speed reducer and the differential.

[0047] Specifically, in combination Figures 3 to 5 It can be seen that the mounting recess 20 is recessed inwardly on the end wall 12 and recessed to the space between the three second gear grooves 132. In this way, after the planetary gears 40 and the differential gear set 50 are assembled, from Figure 9 and Figure 10 It can be seen that at least part of the differential gear set 50 is located in the space between the three second gears 42. Therefore, in the embodiment, the integration degree of the speed reducer and the differential in the axial direction is higher, and the size of the integrated structure in the axial direction is smaller.

[0048] As Figure 4 shown, in the technical scheme of the embodiment, the second side wall 22 is provided with an oil passing hole 221, and the oil passing hole 221 is communicated with the second gear groove 132. The oil passing hole 221 communicates the second gear groove 132 and the mounting recess 20, so that the lubricating oil can be thrown into the differential gear set 50 through the oil passing hole 221 when the planetary gear 40 operates, thereby solving the problem of how to supplement oil to the differential gear set 50 without setting a differential housing.

[0049] Further, in the embodiment, the oil passing hole 221 is provided at the second side wall 22 corresponding to each of the three second gear grooves 132, that is, three oil passing holes 221 are provided, so as to realize uniform lubrication of the differential gear set 50 in the circumferential direction.

[0050] As shown in Figures 3 to 5 , and Figures 8 to 9 , in the technical scheme of the embodiment, the differential gear set 50 includes a plurality of planetary bevel gears 51 distributed in the circumferential direction and engaged in sequence, and two bevel half shaft gears 52, which are respectively located on the two sides of the planetary bevel gears 51 and are engaged with the planetary bevel gears 51. The support part 14 is provided with a rotating shaft hole 141, and the integrated structure further includes a rotating shaft 70 which passes through the rotating shaft hole 141 and is connected with the planetary bevel gears 51.

[0051] Specifically, in the embodiment, the planetary bevel gears 51 are provided in three, and of course, according to the torque bearing requirement, those skilled in the art can also adjust the planetary bevel gears 51 to other quantities. The two bevel half shaft gears 52 are respectively located on the two sides of the three planetary bevel gears 51 and are engaged with the three planetary bevel gears 51. The bevel half shaft gears 51 are connected with the through shaft to realize the power transmission to the wheels. The planetary bevel gears 52 realize the adjustment of the speed difference of the two gears.

[0052] When the vehicle is running, the rotor shaft 101 of the motor 100 rotates to drive the sun gear 30 to rotate, the sun gear 30 rotates to drive the planetary gear 40 to rotate, the planetary gear 40 rotates to drive the planetary carrier 10 to rotate, the planetary carrier 10 rotates to drive the differential gear set 50 to rotate, and the power is transmitted to the wheels on both sides through the planetary bevel gears 51 and the bevel half shaft gears 52.

[0053] In the process of straight running of the vehicle, the planetary bevel gears 51 and the bevel half shaft gears 52 on both sides do not rotate relative to each other, and the three can be regarded as an integral structure. If the vehicle turns or other conditions cause the speed of the left and right wheels to be inconsistent, at this time, the planetary bevel gears 51 and the bevel half shaft gears 52 on both sides rotate relative to each other, so as to adjust the speed difference of the two wheels.

[0054] Further, since the differential housing is no longer provided in the embodiment, the mounting hole of the rotating shaft 70 needs to be provided on the planetary carrier 10. As shown in Figures 3 to 5 , in the embodiment, the rotating shaft hole 141 is provided on the support part 14 by using the position of the solid structure of the support part 14.

[0055] From Figure 5 , it can be seen that the rotating shaft hole 141 extends along the radial direction of the planetary carrier 10, one end of the rotating shaft hole 141 penetrates through the outer surface of the support part 14, and the other end penetrates into the mounting recess 20. The rotating shaft 70 is arranged in the rotating shaft hole 141 and is fixed in the rotating shaft hole 141 by a shaft pin. The planetary bevel gears 51 are rotatably connected to the rotating shaft 70.

[0056] From Figure 5It can also be seen that, since three planetary wheel mounting grooves 13 are arranged in the embodiment, the support portions 14 correspondingly have three. Each support portion 14 is provided with a rotating shaft hole 141, and a rotating shaft 70 is arranged in each rotating shaft hole 141, and the three planetary bevel gears 51 correspondingly.

[0057] It can be seen that, the number of planetary wheels 40 and planetary bevel gears 51 is equal, which is a preferred embodiment.

[0058] Since the support portions 14 play a role in supporting the planetary carrier 10, the structural strength of the support portions 14 also needs to be ensured. As shown in Figure 3 and Figure 4 In the technical solution of the embodiment, the end wall 12 is provided with a reinforcing rib 142 at the position corresponding to the rotating shaft hole 141.

[0059] Specifically, the reinforcing rib 142 is arranged on the end wall 12 away from the motor 100 at the position corresponding to the rotating shaft hole 141, and the reinforcing rib 142 has a long strip structure, the extending direction of which is consistent with the extending direction of the rotating shaft hole 141, and the reinforcing rib 142 is located outside the rotating shaft hole 141. In this way, the strength of the position of the support portion 14 where the rotating shaft hole 141 is arranged can be reinforced.

[0060] As shown in Figures 3 to 5 , the bottom wall of the mounting recess 20 is provided with a first through hole 23, and the bevel pinion gear 52 includes a tooth portion 521 and a shaft portion 522, and the shaft portion 522 of one of the bevel pinion gears 52 passes through the first through hole 23.

[0061] Taking the bevel pinion gear 52 as an example, the bevel pinion gear 52 includes a tooth portion 521 and a shaft portion 522, the tooth portion 521 refers to the part provided with teeth on the outer periphery, and the shaft portion 522 refers to a structure protruding outward from the end face of the tooth portion 521, which is a hollow column structure and the inner surface of which is not provided with teeth.

[0062] As can be seen from Figure 11 , the shaft portion 522 of the bevel pinion gear 52 passes through the first through hole 23, which also has a positioning effect on the bevel pinion gear 52.

[0063] As shown in Figure 6 and Figure 11 , in the technical solution of the embodiment, the end cover 60 is provided with a second through hole 61, and the shaft portion 522 of the other bevel pinion gear 52 passes through the second through hole 61. The second through hole 61 also has a positioning effect on the bevel pinion gear 52.

[0064] As shown above, it is preferred in the embodiment that the number of the planetary gears 40 is equal to the number of the planetary bevel gears 51. In some unshown embodiments, the number of the planetary gears 40 is more than the number of the planetary bevel gears 51, which is also a feasible embodiment.

[0065] For example, the number of the planetary gears 40 is four and the number of the planetary bevel gears 51 is two, in which case the carrier 10 has four support portions 14, and the shaft hole 141 is arranged on two adjacent support portions 14.

[0066] For another example, the number of the planetary gears 40 is six and the number of the planetary bevel gears 51 is two, in which case the carrier 10 has six support portions 14, and the shaft hole 141 is arranged on two adjacent support portions 14.

[0067] For another example, the number of the planetary gears 40 is six and the number of the planetary bevel gears 51 is three, in which case the carrier 10 has six support portions 14, and the shaft hole 141 is arranged on two or three adjacent support portions 14.

[0068] In the above arrangement, the number of the support portions 14 can ensure that the shaft hole 141 corresponding to the number of the planetary bevel gears 51 is arranged after the shaft 70, and the plurality of planetary bevel gears 51 can be arranged in a uniform manner in the circumferential direction, thereby ensuring the stability of the rotation of the axle.

[0069] Therefore, the number of the planetary gears 40 is an integer multiple of the number of the planetary bevel gears 51, which is also a feasible embodiment.

[0070] The application further provides a vehicle, and an embodiment of the vehicle according to the application includes the integrated structure of the planetary reducer and the differential.

[0071] Optionally, the vehicle is a new energy electric vehicle, and the vehicle further includes a motor 100, and the motor 100 includes a rotor shaft 101 connected with the sun gear 30.

[0072] Obviously, the above embodiments are merely exemplary and are not intended to limit the embodiments. Based on the above description, other different forms of changes or modifications can be made by those skilled in the art. Here, it is not necessary or possible to exhaust all the embodiments. The obvious changes or modifications derived therefrom are still within the protection scope of the application.

Claims

1. An integrated structure of a planetary decelerator and a differential, characterized by, The application relates to a differential gear set, which comprises the following components: a planet carrier (10) comprising a first side wall (11) provided with a plurality of planet wheel mounting grooves (13) and two end walls (12), a support part (14) being formed between adjacent planet wheel mounting grooves (13), one of the end walls (12) being provided with a mounting recess (20) forming an opening (21), the mounting recess (20) comprising a second side wall (22) located inside the planet wheel mounting grooves (13); a sun gear (30) arranged in the planet carrier (10) and a plurality of planet gears (40) arranged in the planet wheel mounting grooves (13) one by one; a differential gear set (50) arranged in the mounting recess (20); an end cover (60) arranged at the opening (21) of the mounting recess (20).

2. The integrated structure of claim 1, wherein, The planet gears (40) comprise coaxially connected first gears (41) and second gears (42), the diameter of the first gears (41) is larger than that of the second gears (42), the planet wheel mounting grooves (13) comprise first gear grooves (131) and second gear grooves (132) communicating with each other, the first gears (41) are arranged in the first gear grooves (131), the second gears (42) are arranged in the second gear grooves (132), and the mounting recess (20) is formed in a space surrounded by the plurality of second gear grooves (132) on the inside.

3. The integrated structure of claim 2, wherein, The second side wall (22) is provided with an oil passing hole (221) communicating with the second gear grooves (132).

4. The integrated structure of any one of claims 1 to 3, wherein, The differential gear set (50) comprises a plurality of planet bevel gears (51) distributed in a circumferential direction and engaged in sequence, and two bevel half shaft gears (52) located on two sides of the planet bevel gears (51) and meshing with the planet bevel gears (51), the support part (14) is provided with a rotating shaft hole (141), and the integrated structure further comprises a rotating shaft (70) penetrating through the rotating shaft hole (141) and connected with the planet bevel gears (51).

5. The integrated structure of claim 4, wherein, The end wall (12) is provided with a reinforcing rib (142) corresponding to the position of the rotating shaft hole (141).

6. The integrated structure of claim 4, wherein, The bottom wall of the mounting recess (20) is provided with a first through hole (23), the bevel half shaft gears (52) comprise tooth parts (521) and shaft parts (522), and the shaft part (522) of one of the bevel half shaft gears (52) penetrates through the first through hole (23).

7. The integrated structure of claim 6, wherein, The end cover (60) is provided with a second through hole (61), and the shaft part (522) of the other bevel half shaft gear (52) penetrates through the second through hole (61).

8. The integrated structure of any one of claims 1-3, wherein, The differential gear set (50) comprises a plurality of planetary bevel gears (51) distributed in a circumferential direction and engaged in sequence, and two bevel half shaft gears (52), the two bevel half shaft gears (52) are respectively located on both sides of the planetary bevel gears (51), and the bevel half shaft gears (52) are engaged with the planetary bevel gears (51), wherein the number of the planetary gears (40) is the same as the number of the planetary bevel gears (51), or the number of the planetary gears (40) is a positive integer multiple of the number of the planetary bevel gears (51).

9. A vehicle characterized by comprising: The integrated structure of the planetary reducer and the differential includes the integrated structure of the planetary reducer and the differential according to any one of claims 1 to 8.

10. The vehicle of claim 9, wherein, The vehicle further comprises an electric motor (100), the electric motor (100) comprising a rotor shaft (101), the rotor shaft (101) being connected to the sun gear (30).

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