Connecting structure of planetary reducer and differential mechanism and vehicle

Abstract

The utility model provides a connecting structure of a planetary reducer and a differential mechanism and a vehicle, and the connecting structure comprises a reducer assembly which comprises a sun gear, a planet gear assembly connected with the sun gear, and a planet carrier connected with the planet gear assembly; the differential assembly comprises a shell and a differential gear assembly, the shell comprises a first concave part, the first concave part forms an opening in the shell, at least part of the differential gear assembly is arranged in the first concave part, and the shell is buckled on the planet carrier. According to the structure, one part of the planet carrier serves as a structure for sealing the opening of the shell, namely, the other half of the shell of a differential in the prior art is omitted, the space occupied by the differential assembly in the axial direction of vehicle wheels is reduced, and miniaturization design of a vehicle is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle drive systems, in particular to a connection structure of a planetary reducer and a differential, and a vehicle. Background Art

[0002] The coaxial electric drive system is a key component of new energy electric vehicles. Its structure is as follows: the motor's rotor shaft is connected to the sun gear of the speed reducer. After being decelerated by the planetary gear train, the planetary gears drive the planetary carrier. The differential is connected to the planetary carrier and contains two axle gears and planetary bevel gears. The two axle gears are connected to two through-shafts, which are then connected to the left and right wheels. When the vehicle is in operation, the rotor shaft drives the differential through the speed reducer, and the differential's rotation transmits power to both wheels. When the vehicle is turning, the gears within the differential rotate relative to each other, compensating for the speed difference between the left and right gears.

[0003] The conventional differential is an assembly consisting of a left housing and a right housing. The left and right housings enclose a cavity for housing the side gears and planetary bevel gears. The left or right housing is bolted to the planetary carrier. In this structure, the two housings are relatively thick, occupying a significant amount of axial space around the vehicle's wheels, hindering the vehicle's short wheelbase and compact design. Utility Model Content

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defect in the prior art that the differential housing of the vehicle is relatively thick, which is not conducive to the short wheelbase design and miniaturization design of the vehicle, thereby providing a connection structure between a planetary reducer and a differential and a vehicle.

[0005] In order to solve the above problems, the utility model provides a connection structure between a planetary reducer and a differential, including: a reducer assembly, including a sun gear, a planetary gear assembly connected to the sun gear, and a planetary carrier connected to the planetary gear assembly; a differential assembly, including a housing and a differential gear assembly, the housing including a first recess, the first recess forming an opening on the housing, at least a portion of the differential gear assembly is arranged in the first recess, wherein the housing is snapped onto the planetary carrier.

[0006] Optionally, the housing includes a cover shell and a connecting flange arranged on the outer side wall of the cover shell, the space inside the cover shell forms a first recess, at least part of the differential gear assembly is arranged in the cover shell, and the connecting flange is connected to the planetary carrier.

[0007] Optionally, the planet carrier includes two end walls and side walls, wherein a first connecting hole is provided on one of the end walls, a second connecting hole is provided on the connecting flange, and the connecting structure further includes a fastener passing through the first connecting hole and the second connecting hole.

[0008] Optionally, the differential gear assembly includes a planetary bevel gear and two bevel half-shaft gears, the two bevel half-shaft gears are respectively located on both sides of the planetary bevel gear, and the bevel half-shaft gears are meshed with the planetary bevel gears, a rotating shaft hole is provided on the cover, and the differential assembly also includes a rotating shaft, which passes through the rotating shaft hole and is connected to the planetary bevel gears.

[0009] Optionally, an oil hole is provided on the cover.

[0010] Optionally, the planet carrier includes two end walls and a side wall, the end wall is provided with a second recess, the second recess includes an annular side wall, and the edge of the opening protruding toward the planet carrier cooperates with the annular side wall.

[0011] Optionally, the second recess also includes a first concave surface, a third concave surface is provided on the first concave surface, the differential gear assembly includes a planetary bevel gear and two bevel half-shaft gears, the two bevel half-shaft gears are respectively located on both sides of the planetary bevel gear, and the bevel half-shaft gears are meshed with the planetary bevel gears, the bevel half-shaft gears include a tooth portion and a shaft portion, and the tooth portion of one of the bevel half-shaft gears is provided in the third recess.

[0012] Optionally, the third recess includes a second concave surface, the second concave surface is provided with a through hole, and the shaft portion of the bevel gear side gear arranged in the third recess passes through the through hole.

[0013] The utility model also provides a vehicle, comprising the connection 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] With the technical solution of the present invention, the differential assembly housing has an opening. After the differential gear assembly is installed in the first recess, the housing is directly fastened to the planetary carrier through the opening for connection. In this structure, a portion of the planetary carrier serves to seal the housing opening, eliminating the other half of the differential housing as in the prior art. This reduces the space occupied by the differential assembly in the axial direction of the vehicle wheels, facilitating a compact vehicle design. Thus, the technical solution of the present invention overcomes the drawback of prior art vehicles with relatively thick differential housings, which hinders short wheelbase and compact designs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 A schematic structural diagram showing the connection structure between the planetary reducer and the differential of the present invention is shown;

[0019] Figure 2 Shown Figure 1 A schematic structural diagram of a differential assembly with a central connection structure;

[0020] Figure 3 Shown Figure 2 A schematic structural diagram of the housing of the center differential assembly;

[0021] Figure 4 Shown Figure 2 A schematic structural diagram of the housing of the center differential assembly from another side;

[0022] Figure 5 Shown Figure 2 A schematic structural diagram of the differential gear assembly of the center differential assembly;

[0023] Figure 6 Shown Figure 1 Schematic diagram of the structure of the motor and reducer assembly with a central connection structure;

[0024] Figure 7 Shown Figure 6 Schematic diagram of the structure of the planetary carrier of the middle reducer assembly;

[0025] Figure 8 Shown Figure 6 Schematic diagram of the structure of the sun gear and planetary gears of the middle reducer assembly;

[0026] Figure 9 Shown Figure 1 A cross-sectional schematic diagram of the connecting structure;

[0027] Figure 10 Shown Figure 9 Schematic diagram of the fastener;

[0028] Figure 11 Shown Figure 9 Schematic diagram of the cooperation between the bevel gear and the planetary carrier.

[0029] Description of reference numerals:

[0030] 10. Reducer assembly; 11. Sun gear; 12. Planetary gear assembly; 13. Planet carrier; 131. End wall; 132. Side wall; 133. First connecting hole; 20. Differential assembly; 21. Housing; 211. First recess; 212. Opening; 2121. Edge; 213. Cover; 214. Connecting flange; 215. Second connecting hole; 216. Rotating shaft hole; 217. Oil hole; 22. Differential gear assembly; 221. Planetary bevel gear; 222. Bevel gear side gear; 2221. Tooth portion; 2222. Shaft portion; 23. Rotating shaft; 30. Fastener; 40. Second recess; 41. Annular side wall; 42. First concave surface; 50. Third recess; 51. Through hole; 52. Second concave surface; 100. Motor; 101. Rotor shaft. DETAILED DESCRIPTION

[0031] The following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0032] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0033] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0034] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0035] like Figures 1 to 11As shown, the connection structure of the planetary reducer and differential according to the present application includes a reducer assembly 10 and a differential assembly 20. The reducer assembly 10 includes a sun gear 11, a planetary gear assembly 12 connected to the sun gear 11, and a planetary carrier 13 connected to the planetary gear assembly 12. The differential assembly 20 includes a housing 21 and a differential gear assembly 22. The housing 21 includes a first recess 211, which forms an opening 212 on the housing 21. At least a portion of the differential gear assembly 22 is disposed within the first recess 211. Furthermore, the housing 21 is snap-fitted to the planetary carrier 13.

[0036] Utilizing the technical solution of this embodiment, the housing 21 of the differential assembly 20 has an opening 212. After the differential gear assembly 22 is installed in the first recess 211, the housing 21 is directly fastened to the planetary carrier 13 for connection. In this structure, a portion of the planetary carrier 13 is used to seal the opening 212 of the housing 21. This eliminates the need for the other half of the differential housing in the prior art, reducing the space occupied by the differential assembly in the axial direction of the vehicle wheels and facilitating a compact vehicle design. Therefore, the technical solution of this embodiment overcomes the drawback of prior art vehicles' differential housings being relatively thick, which hinders short wheelbase and compact designs.

[0037] like Figure 1 and Figure 6 As shown, the function of the reducer assembly 10 is to change the transmission ratio and torque of the rotor shaft 101 of the motor 100, which includes a sun gear 11, a planetary gear assembly 12 and an outer gear ring (not shown in the figure). Figure 8 As can be seen, the sun gear 11 is located in the center. The planetary gear assembly 12 includes multiple planetary gears, which are circumferentially located around the sun gear 11. In this embodiment, there are three planetary gears. These planetary gears mesh with the outer ring gear, which is fixed. Therefore, when the rotor shaft 101 of the motor 100 rotates, the multiple planetary gears rotate along their own axes and around the sun gear 11. In other words, the reducer assembly 10 in this embodiment is a NW planetary gear system.

[0038] Combine Figure 8 It can also be seen that in the planetary gear assembly 12 in this embodiment, each planetary gear includes a large gear and a small gear arranged coaxially, the large gear is engaged with the sun gear 11, and the small gear is engaged with the ring gear, so the reducer assembly 10 can achieve two-stage deceleration and torque conversion.

[0039] from Figure 6 and Figure 7 It can be seen that the planet carrier 13 is connected to the planetary gear assembly 12, and the planetary gear can rotate on the planet carrier 13 through the rotating shaft. Therefore, when the planetary gear assembly 12 rotates around the sun gear 11, its rotation can be output through the planet carrier 13.

[0040] like Figures 2 to 4 It can be seen that the differential assembly 20 includes a housing 21, and the housing 21 has a first recess 211, and the first recess 211 forms an opening 212 on the housing 21. The above-mentioned "the first recess 211 forms an opening 212 on the housing 21" means that the differential gear assembly 22 is installed in the first recess 211 through the opening 212. After the differential gear assembly 22 is installed in the opening 212, it can be completely located in the opening 212, or it can be partially located in the opening 212, that is, there is still a part protruding from the opening 212. And for the housing 21, the opening 212 is not closed, and the differential gear assembly 22 can be detached from the opening 212. Figure 3 and Figure 4 Those skilled in the art will understand that the shell 21 is not a complete shell, and it is missing a part, or in other words, the shell 21 lacks the part that closes the first recess 211 .

[0041] from Figure 9 As can be seen, the housing 21 is fastened to the planet carrier 13 through the opening 212. Specifically, the housing 21 uses a portion of the planet carrier 13 to enclose the first recess 211, thereby securing the differential gear assembly 22 within. Therefore, the housing 21 eliminates the need for the missing portion; the planet carrier 13 seals its interior. Compared to the prior art, the housing 21 of the differential assembly 20 in this embodiment reduces its axial footprint by nearly half (by eliminating the other half of the housing), thus further facilitating a shorter wheelbase and more compact vehicle design.

[0042] like Figure 2 and Figure 3 As shown, in the technical solution of this embodiment, the housing 21 includes a cover shell 213 and a connecting flange 214 arranged on the outer wall of the cover shell 213, the differential gear assembly 22 is arranged in the cover shell 213, and the connecting flange 214 is connected to the planetary carrier 13.

[0043] Specifically, in this embodiment, the housing 213 has a generally hemispherical structure, which may be a spherical cap, or a shape approximately similar to a spherical cap. The space enclosed by the housing 213 forms the aforementioned first recess 211, and the edge of the housing 213 forms the aforementioned opening 212. This configuration allows the housing 213 to occupy as little space as possible.

[0044] In some embodiments not shown, the cover 213 may also be configured to have other shapes, such as a square, an irregular shape, etc.

[0045] Furthermore, after the differential gear assembly 22 is installed in the housing 213, it is engaged with the planet carrier 13, and the connecting flange 214 is engaged with the surface of the planet carrier 13. The connecting flange 214 and the planet carrier 13 are connected by fasteners 30, thereby ensuring that the housing 213 can be stably connected to the planet carrier 13.

[0046] Of course, the connecting flange 214 and the planet carrier 13 may also be connected by other means, such as welding, bonding, etc.

[0047] like Figure 4 、 Figure 7 and Figure 10 As shown, in the technical solution of this embodiment, the planetary carrier 13 includes two end walls 131 and a side wall 132, wherein a first connecting hole 133 is provided on one of the end walls 131, and a second connecting hole 215 is provided on the connecting flange 214, and the fastener 30 includes a bolt, which passes through the first connecting hole 133 and the second connecting hole 215.

[0048] from Figure 6 and Figure 7 As can be seen, the space between the two end walls 131 and the side walls 132 is used to accommodate the sun gear 11 and the planetary gear assembly 12. Of the two end walls 131, one faces the motor 100 after assembly, and the other faces the differential assembly 20. A through-hole is provided in the center of the end wall 131 facing the motor 100, through which the rotor shaft 101 of the motor 100 passes to connect with the sun gear 11.

[0049] from Figure 7 It can also be seen that the sidewall 132 is provided with multiple mounting slots for mounting the planetary gears. These slots allow a portion of the planetary gear to pass through the slots and be positioned outside the sidewall 132, enabling the planetary gears to mesh with the ring gear. Mounting holes are provided at corresponding positions on the two end walls 131, communicating with the mounting slots. The planetary gear axles pass through the two mounting holes, thereby securing the planetary gears to the planetary carrier 13 and enabling the planetary gears to rotate along their axes.

[0050] from Figure 7 and Figure 10 As can be seen, the cover 213 is fastened to the end wall 131 facing the differential assembly 20. A first connecting hole 133 is provided on the end wall 131, and a second connecting hole 215 is provided on the connecting flange 214. The first connecting hole 133 and the second connecting hole 215 are aligned, and bolts are then inserted into the first connecting hole 133 and the second connecting hole 215. The bolts are then tightened to secure the cover 213 to the planet carrier 13.

[0051] Furthermore, multiple second connection holes 215 are spaced apart along the extending direction of the connection flange 214. Correspondingly, multiple first connection holes 133 are also spaced apart circumferentially along the end wall 131. During installation, the multiple first connection holes 133 are aligned with the multiple second connection holes 215, and then multiple bolts are sequentially inserted into the first connection holes 133 and the second connection holes 215. The multiple bolts ensure that the cover 213 is securely connected to the planet carrier 13 along its entire circumference.

[0052] like Figure 5 As shown, in the technical solution of this embodiment, the differential gear assembly 22 includes a planetary bevel gear 221 and two bevel side gears 222. The two bevel side gears 222 are located on both sides of the planetary bevel gear 221, and the bevel side gears 222 mesh with the planetary bevel gears 221. The housing 213 is provided with a rotating shaft hole 216. The differential assembly 20 also includes a rotating shaft 23. The rotating shaft 23 passes through the rotating shaft hole 216 and is connected to the planetary bevel gears 221.

[0053] Specifically, the number of the planetary bevel gears 221 can be multiple according to the load-bearing requirements, for example, two or more. In this embodiment, the number of the planetary bevel gears 221 is four.

[0054] Along the wheel axis of the vehicle, the two bevel gears 222 are located on both sides of the planetary bevel gear 221, and both bevel gears 222 are meshed with the planetary bevel gear 221. The two bevel gears 222 are connected to the left and right wheels via through shafts.

[0055] from Figure 3 It can be seen that the housing 213 is provided with shaft holes 216, and the number of the shaft holes 216 is consistent with the number of the planetary bevel gears 221. In this embodiment, there are four shaft holes 216, and the four shaft holes 216 are evenly spaced along the circumferential direction.

[0056] Furthermore, the rotating shaft 23 passes through the rotating shaft hole 216 , and the rotating shaft 23 is fixed to the rotating shaft hole 216 via a shaft pin, and the planetary bevel gear 221 is rotatably connected to the rotating shaft 23 .

[0057] When the vehicle is running, the rotor shaft of motor 100 rotates, driving sun gear 11. This rotation of sun gear 11 drives planetary gear assembly 12. This rotation of planetary gear assembly 12 drives planet carrier 13. This rotation of planet carrier 13 drives housing 213. The rotation of housing 213 is transmitted to the wheels on both sides via planetary bevel gears 221 and bevel side gears 222.

[0058] When the vehicle is traveling in a straight line, the planetary bevel gear 221 and the bevel side gears 222 on either side do not rotate relative to each other, and the three can be considered an integrated structure. If the vehicle turns or otherwise experiences a speed discrepancy between the left and right wheels, the planetary bevel gear 221 and the bevel side gears 222 on either side rotate relative to each other, thereby closing the speed difference between the two wheels.

[0059] like Figure 3 As shown, in the technical solution of this embodiment, the cover 213 is provided with an oil hole 217. Lubricating oil can flow from the oil hole 217 to the meshing part of the planetary bevel gear 221 and the bevel gear side gear 222, thereby ensuring that the planetary bevel gear 221 and the bevel gear side gear 222 can rotate smoothly relative to each other.

[0060] like Figure 7 and Figure 11 As shown, in the technical solution of this embodiment, a second recess 40 is provided on the end wall 131 . The second recess 40 includes an annular side wall 41 . The edge 2121 of the opening 212 protruding toward the planet carrier 13 cooperates with the annular side wall 41 .

[0061] Specifically, a second recess 40 is provided on the surface of the end wall 131 facing the differential assembly 20. The second recess 40 is circular in shape and has an annular sidewall 41 and a first concave surface 42. The first concave surface 42 is recessed inward relative to the outer surface of the end wall 131. The second recess 40 is concentric with the end wall 131.

[0062] Combine Figure 4 and Figure 10 It can be seen that the above-mentioned connecting flange 214 is not arranged at the edge of the cover 213 facing the planetary carrier 13, but the connecting flange 214 is at a certain distance from the above-mentioned edge of the cover 213, which makes the edge of the cover 213 facing the planetary carrier 13 protrude from the connecting flange 214, that is, the opening 212 has an edge 2121.

[0063] During assembly, the edge 2121 of the opening 212 snaps into the second recess 40 and engages with the annular sidewall 41, allowing the housing 213 and the planet carrier 13 to be quickly coaxially aligned. The housing 213 is then rotated to align the first connection hole 133 with the second connection hole 215, and the fastener 30 can be assembled. This structure allows for quick positioning and assembly of the housing 213 and the planet carrier 13.

[0064] like Figure 7 and Figure 11As shown, in the technical solution of this embodiment, a third recess 50 is provided on the first recess 42 of the second recess 40. The third recess includes a second recess 52, which is recessed inward relative to the first recess 42, forming a stepped structure. The bevel side gear 222 includes a tooth portion 2221 and a shaft portion 2222. The tooth portion 2221 of one of the bevel side gears 222 is disposed within the third recess 50.

[0065] As mentioned above, the opening 212 of the cover 213 is not sealed, so the bevel gear 222 located on the outside needs to be further positioned.

[0066] from Figure 7 It can be seen that the third recess 50 is provided on the first concave surface 42 of the second recess 40 , and is also circular. The third recess 50 is concentrically provided with the second recess 40 .

[0067] The bevel gear half-axle gear 222 includes a tooth portion 2221 and a shaft portion 2222. The tooth portion 2221 refers to the portion with teeth arranged on the outer periphery, and the shaft portion refers to a section of structure protruding outward from the end surface of the tooth portion 2221. The structure is a hollow column structure and has no teeth arranged on the inner surface.

[0068] from Figure 11 It can be seen that during assembly, the tooth portion 2221 of the outer bevel side gear 222 is accommodated in the third recess 50. The inner diameter of the third recess 50 is slightly larger than the outer diameter of the tooth portion 2221 so as not to affect the rotation of the bevel side gear 222. Therefore, the third recess 50 serves to position the bevel side gear 222 at the opening 212.

[0069] As described above, by providing the second recess 40 and the third recess 50 on the surface of the end wall 131 facing the differential assembly 20 , the functions of positioning the cover 213 and the bevel gear side gear 222 are integrated.

[0070] like Figure 11 As shown, in the technical solution of this embodiment, a through hole 51 is provided on the second concave surface 52 of the third concave portion 50 , and the shaft portion 2222 of the bevel gear 222 disposed in the third concave portion 50 passes through the through hole 51 .

[0071] Specifically, the through hole 51 is located at the center of the second concave surface 52. The first concave surface 42, the second concave surface 52, and the through hole 51 are concentrically arranged. By passing the shaft portion 2222 through the through hole 51, the bevel gear 222 can be positioned so as to maintain a coaxial position with the planet carrier 13.

[0072] Combine Figure 11It can also be seen that the bevel side gear 222 is provided with a center hole with internal teeth for connecting with the external teeth of the through-shaft. For the bevel side gear 222 facing the reducer assembly 10, the through-shaft connected to it passes through the planet carrier 13, sun gear 11, and rotor shaft 101 before connecting to one wheel. For the bevel side gear 222 facing away from the reducer assembly 10, the through-shaft connected to it passes through a through hole in the top of the housing 213 before connecting to the other wheel.

[0073] The present application also provides a vehicle. According to an embodiment of the vehicle of the present application, the vehicle includes the above-mentioned connection structure between the planetary reducer and the differential.

[0074] Optionally, the vehicle is a new energy electric vehicle, and the vehicle further includes a motor 100 , the motor 100 includes a rotor shaft 101 , and the rotor shaft 101 is connected to the sun gear 11 .

[0075] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A connection structure between a planetary reducer and a differential, characterized in that: include: A speed reducer assembly (10) includes a sun gear (11), a planetary gear assembly (12) connected to the sun gear (11), and a planetary carrier (13) connected to the planetary gear assembly (12); A differential assembly (20) includes a housing (21) and a differential gear assembly (22), wherein the housing (21) includes a first recess (211), wherein the first recess (211) forms an opening (212) on the housing (21), and at least a portion of the differential gear assembly (22) is disposed in the first recess (211). Wherein, the housing (21) is buckled onto the planet carrier (13).

2. The connection structure according to claim 1, characterized in that: The housing (21) includes a cover shell (213) and a connecting flange (214) arranged on the outer side wall of the cover shell (213); the space inside the cover shell (213) forms the first recess (211); at least a portion of the differential gear assembly (22) is arranged inside the cover shell (213); and the connecting flange (214) is connected to the planet carrier (13).

3. The connection structure according to claim 2, characterized in that: The planet carrier (13) includes two end walls (131) and a side wall (132), wherein a first connecting hole (133) is provided on one of the end walls (131), and a second connecting hole (215) is provided on the connecting flange (214). The connecting structure also includes a fastener (30), and the fastener (30) passes through the first connecting hole (133) and the second connecting hole (215).

4. The connection structure according to claim 2, characterized in that: The differential gear assembly (22) includes a planetary bevel gear (221) and two bevel gear side gears (222), the two bevel gear side gears (222) are respectively located on both sides of the planetary bevel gear (221), and the bevel gear side gears (222) are meshed with the planetary bevel gears (221), a rotating shaft hole (216) is provided on the cover (213), and the differential assembly (20) further includes a rotating shaft (23), the rotating shaft (23) passes through the rotating shaft hole (216) and is connected to the planetary bevel gears (221).

5. The connection structure according to claim 2, characterized in that: The cover shell (213) is provided with an oil hole (217).

6. The connection structure according to any one of claims 2 to 5, characterized in that: The planet carrier (13) includes two end walls (131) and a side wall (132), the end wall (131) is provided with a second recess (40), the second recess (40) includes an annular side wall (41), and the edge (2121) of the opening (212) protruding toward the planet carrier (13) cooperates with the annular side wall (41).

7. The connection structure according to claim 6, characterized in that: The second concave portion (40) further comprises a first concave surface (42), a third concave portion (50) being provided on the first concave surface (42), the differential gear assembly (22) comprising a planetary bevel gear (221) and two bevel gear side gears (222), the two bevel gear side gears (222) being respectively located on both sides of the planetary bevel gear (221), and the bevel gear side gears (222) being meshed with the planetary bevel gears (221), the bevel gear side gears (222) comprising a tooth portion (2221) and a shaft portion (2222), the tooth portion (2221) of one of the bevel gear side gears (222) being provided in the third concave portion (50).

8. The connection structure according to claim 7, characterized in that: The third recess (50) includes a second recess (52), the second recess (52) being provided with a through hole (51), and the shaft (2222) of the bevel gear (222) disposed in the third recess (50) passes through the through hole (51).

9. A vehicle, characterized in that: The invention comprises a connection structure between a planetary reducer and a differential as claimed in any one of claims 1 to 8.

10. The vehicle according to claim 9, characterized in that The vehicle further comprises an electric motor (100), wherein the electric motor (100) comprises a rotor shaft (101), and the rotor shaft (101) is connected to the sun gear (11).

Images