Planetary shaft, differential mechanism and vehicle

Abstract

The utility model relates to a planet shaft, a differential mechanism and a vehicle, and relates to the technical field of differential mechanisms. The planet shaft comprises a long shaft and a short shaft; the short shaft comprises a main body and an inserting part which are connected in the axial direction of the short shaft, the inserting part is connected with the long shaft in an inserting mode, the cross section of the inserting part has the minimum diameter and the maximum diameter, and the direction where the maximum diameter is located is not perpendicular to the axis of the long shaft; wherein the number of the short shafts is two, and the two short shafts are located on the two sides of the long shaft respectively and are coaxially arranged. According to the invention, the cross section of the insertion part is arranged to be of a structure with the maximum diameter and the minimum diameter, and the direction of the maximum diameter of the insertion part is not perpendicular to the axis of the long shaft, so that the size of the insertion part can be increased in the non-radial direction of the long shaft on the premise that the radial strength of the matching part of the long shaft and the short shaft is not influenced. Therefore, the strength of the inserted part of the short shaft and the long shaft can be improved, so that the planet shaft can be effectively prevented from being broken during high-strength operation.

Description

Technical Field

[0001] This application relates to the technical field of differentials, and particularly to a planetary shaft, a differential, and a vehicle. Background Art

[0002] An automotive differential is a transmission system component used to allow the left and right wheels to rotate at different speeds when the vehicle turns, thereby improving driving stability and tire grip. Among them, the differential includes a housing, a cover, a cross planetary shaft, four planetary gears, and two half shaft gears. The housing and the cover are mutually covered to define an installation cavity. The cross planetary shaft is located in the installation cavity, and the four planetary gears are respectively installed at the four shaft ends of the cross planetary shaft. The two half shaft gears are located in the installation cavity and on both sides of the cross planetary shaft.

[0003] In the related art, the cross planetary shaft includes a long shaft and two short shafts coaxially arranged on both sides of the long shaft respectively, and the short shafts are inserted into the long shaft. However, the strength of the part where the short shaft is inserted into the long shaft is small and is prone to fracture during high-intensity operation. Summary of the Utility Model

[0004] Embodiments of this application provide a planetary shaft, a differential, and a vehicle to at least solve the above technical problems.

[0005] To achieve the above object, according to the first aspect of this application, a planetary shaft is provided. The planetary shaft includes a long shaft and a short shaft; the short shaft includes a main body and a plug-in part connected along the axial direction of the short shaft, the plug-in part is inserted into the long shaft, and the cross section of the plug-in part has a minimum diameter and a maximum diameter, and the direction where the maximum diameter is located is not perpendicular to the axis of the long shaft; wherein, there are two short shafts, and the two short shafts are respectively located on both sides of the long shaft and are coaxially arranged.

[0006] Optionally, the direction where the maximum diameter is located is parallel to the axis of the long shaft, and along the insertion direction, the maximum diameter is arranged facing the axis of the long shaft.

[0007] Optionally, the maximum diameter is the same as the diameter of the main body.

[0008] Optionally, the direction where the minimum diameter is located is perpendicular to the axis of the long shaft.

[0009] Optionally, the circumferential direction of the plug-in part smoothly transitions from the maximum diameter to the minimum diameter.

[0010] Optionally, along the circumferential direction of the short shaft, the end of the main body connected to the plug-in part smoothly transitions to the plug-in part.

[0011] Optionally, the cross section of the plug-in part is any one of the following shapes: waist-shaped, oval, rectangular.

[0012] Optionally, a first lubricating oil groove is provided on the circumferential surface of the main body.

[0013] Optionally, the extending direction of the first lubricating oil groove is perpendicular to the axis of the short shaft.

[0014] Optionally, the groove wall of the first lubricating oil groove is a first arc surface, one side of the first arc surface is tangent to the groove bottom of the first lubricating oil groove, and the other side is connected to the circumferential surface of the main body.

[0015] Optionally, a second lubricating oil groove is provided on the circumferential surface of the long shaft.

[0016] Optionally, the extending direction of the second lubricating oil groove is perpendicular to the axis of the long shaft.

[0017] Optionally, the groove wall of the second lubricating oil groove is a second arc surface, one side of the second arc surface is tangent to the groove bottom of the second lubricating oil groove, and the other side is connected to the circumferential surface of the main body.

[0018] Optionally, a first pin hole is provided on the short shaft, and the first pin hole is configured to cooperate with a first pin shaft fixed on the differential housing; and / or, a second pin hole is provided on the long shaft, and the second pin hole is configured to cooperate with a second pin shaft fixed on the differential housing.

[0019] According to a second aspect of the present application, a differential is provided, including the aforementioned planetary shaft.

[0020] According to a third aspect of the present application, a vehicle is provided, including the aforementioned differential.

[0021] In the planetary shaft of the embodiment of the present application, through the above technical solution, the cross-section of the insertion portion is set to a structure having a maximum diameter and a minimum diameter, and the direction in which the maximum diameter of the insertion portion is located is not perpendicular to the axis of the long shaft. Thus, on the premise of not affecting the radial strength of the mating portion of the long shaft and the short shaft, the size of the insertion portion can be increased in the non-radial direction of the long shaft. In this way, the strength of the portion where the short shaft is inserted into the long shaft can be improved, and thus the planetary shaft can be effectively prevented from breaking during high-intensity operation.

[0022] Other features and advantages of the present application will be described in detail in the subsequent specific implementation section. Description of the Drawings

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for description in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative efforts.

[0024] In order to more fully understand the present application and its beneficial effects, the following description will be made in conjunction with the drawings, where the same reference numerals represent the same parts in the following description.

[0025] Figure 1 is a schematic diagram of the overall structure of the planetary shaft provided in the exemplary embodiment of the present disclosure;

[0026] Figure 2 is an exploded view of the planetary shaft provided in the exemplary embodiment of the present disclosure;

[0027] Figure 3 is a schematic diagram of the structure of the short shaft provided in the exemplary embodiment of the present disclosure;

[0028] Figure 4 is a schematic diagram of the end face structure of the short shaft provided in the exemplary embodiment of the present disclosure;

[0029] Figure 5 is a side view of the short shaft provided in the exemplary embodiment of the present disclosure;

[0030] Figure 6 is Figure 5 an enlarged view of part A in

[0031] Figure 7 is a partial side view of the long shaft provided in the exemplary embodiment of the present disclosure;

[0032] Figure 8 is Figure 7 an enlarged view of part B in

[0033] Explanation of reference numerals:

[0034] 1 - planetary shaft;

[0035] 11 - long shaft; 111 - slot hole structure; 112 - second lubricating oil groove; 1121 - second arc surface; 113 - second pin hole;

[0036] 12 - short shaft; 121 - main body; 122 - insertion part; 123 - first lubricating oil groove; 1231 - first arc surface; 124 - first pin hole. Detailed implementation manners

[0037] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present application.

[0038] The present application provides a planetary shaft 1. Please refer to Figure 1 and Figure 2 , Figure 1 is a schematic diagram of the overall structure of the planetary shaft 1 provided in the exemplary embodiment of the present disclosure,Figure 2 It is an exploded view of the planetary shaft 1 provided in an exemplary embodiment of the present disclosure.

[0039] The planetary shaft 1 includes a long shaft 11 and a short shaft 12. The short shaft 12 includes a main body 121 and a plug-in portion 122 that are connected along the axial direction of the short shaft 12. The plug-in portion 122 is plugged into the long shaft 11. The cross-section of the plug-in portion 122 has a minimum diameter φmin and a maximum diameter φmax. The direction in which the maximum diameter is located is not perpendicular to the axis of the long shaft 11. Among them, there are two short shafts 12, and the two short shafts 12 are respectively located on both sides of the long shaft 11 and are coaxially arranged.

[0040] It can be understood that the cross-section of the plug-in portion 122 is non-circular so that the cross-section of the plug-in portion 122 has a minimum diameter and a maximum diameter.

[0041] It can be understood that a slot hole structure 111 for inserting the plug-in portion 122 is provided on the long shaft 11. The shape and size of the slot hole structure 111 are the same as those of the portion of the plug-in portion 122 inserted into the long shaft 11.

[0042] It can be understood that in order to ensure the strength of the long shaft 11, the size of the slot hole structure 111 provided thereon for cooperating with the short shaft 12 is limited in the radial direction thereof, that is, the slot hole structure 111 for cooperating with the short shaft 12 cannot be increased arbitrarily in the radial direction.

[0043] Based on this, in this embodiment, by setting the cross-section of the plug-in portion 122 to have a structure with a maximum diameter and a minimum diameter, and making the direction in which the maximum diameter of the plug-in portion 122 is located not perpendicular to the axis of the long shaft 11, the size of the plug-in portion 122 can be increased in the non-radial direction of the long shaft 11 on the premise of not affecting the strength in the radial direction of the mating portion between the long shaft 11 and the short shaft 12. In this way, the strength of the portion where the short shaft 12 is plugged into the long shaft 11 can be improved, and thus the planetary shaft 1 can be effectively prevented from breaking during high-intensity operation.

[0044] Please refer to Figure 2 , in some embodiments, the direction in which the maximum diameter is located is parallel to the axis of the long shaft 11, and along the plugging direction, the maximum diameter is arranged facing the axis of the long shaft 11.

[0045] Correspondingly, the slot hole structure 111 provided on the long shaft 11 for cooperating with the short shaft 12 has a maximum diameter on its axis. In this way, the maximum size of the slot hole structure 111 provided on the long shaft 11 for cooperating with the short shaft 12 can be arranged along the axial direction of the long shaft 11, so that the size of the plug-in portion 122 can be further increased on the premise of not affecting the strength in the radial direction of the mating portion between the long shaft 11 and the short shaft 12, so as to improve the strength of the portion where the short shaft 12 is plugged into the long shaft 11.

[0046] Please refer to Figure 3 andFigure 4 , Figure 3 is a schematic structural view of the short shaft 12 provided in an exemplary embodiment of the present disclosure, Figure 4 and is a schematic end face structure view of the short shaft 12 provided in an exemplary embodiment of the present disclosure. In some embodiments, the maximum diameter is the same as the diameter φ0 of the main body 121. Thus, the transition between the main body and the insertion portion 122 can be reduced, so that the stress at the connection between the main body and the insertion portion 122 can be reduced, thereby improving the stress state at the connection between the main body and the insertion portion 122. Thus, the reliability of the insertion shaft can be improved.

[0047] Please refer to Figure 2 , in some embodiments, the direction where the minimum diameter is located is perpendicular to the axis of the long shaft 11. Correspondingly, the slot hole structure 111 provided on the long shaft 11 and cooperating with the short shaft 12 has the maximum diameter in its radial direction. Thus, the minimum dimension of the slot hole structure 111 provided on the long shaft 11 and cooperating with the short shaft 12 can be arranged along the radial direction of the long shaft 11, so as to ensure the strength in the radial direction of the mating portion between the long shaft 11 and the short shaft 12.

[0048] Please refer to Figure 4 , in some embodiments, the circumferential direction of the insertion portion 122 smoothly transitions from the maximum diameter to the minimum diameter. Thus, it helps to reduce stress concentration, avoid material fatigue and crack generation caused by stress concentration, thereby improving the service life of the short shaft 12, and further improving the reliability of the planetary shaft 1.

[0049] Please refer to Figure 3 and Figure 5 , Figure 5 is a side view of the short shaft 12 provided in an exemplary embodiment of the present disclosure. In some embodiments, along the circumferential direction of the short shaft 12, one end of the main body 121 connected to the insertion portion 122 smoothly transitions to the insertion portion 122. Thus, it helps to reduce the stress at the connection between the main body 121 and the insertion portion 122, avoid cracks at the connection between the main body 121 and the insertion portion 122 caused by stress concentration, thereby improving the service life of the short shaft 12, and further improving the reliability of the planetary shaft 1.

[0050] In some embodiments, the cross-section of the insertion portion 122 is any one of the following shapes: kidney-shaped, oval, rectangular.

[0051] Wherein, when the cross-section of the insertion portion 122 is rectangular, the four corners of the rectangle are rounded.

[0052] Specifically, the major axis of the kidney shape is parallel to the axis of the long shaft 11, and along the insertion direction, the major axis of the kidney shape is arranged opposite to the axial direction of the long shaft 11.

[0053] Specifically, the major axis of the ellipse is parallel to the axis of the long shaft 11, and along the insertion direction, the major axis of the ellipse is axially oppositely arranged with respect to the long shaft 11.

[0054] Specifically, the long side of the rectangle is parallel to the axis of the long shaft 11, and along the insertion direction, the center line parallel to the long side of the rectangle is axially oppositely arranged with respect to the long shaft 11.

[0055] Please refer to Figure 4 and Figure 5 , in some embodiments, a first lubricating oil groove 123 is provided on the circumferential surface of the main body 121.

[0056] It can be understood that the differential housing is provided with a mounting hole for cooperating with the short shaft 12. By providing the first lubricating oil groove 123, an accommodating space can be formed between the first lubricating oil groove 123 and the hole wall of the mounting hole after the short shaft 12 is installed on the differential housing. This accommodating space can not only accommodate lubricating oil but also provide a lubricating oil flow path, thereby improving the lubrication degree of components such as planetary gears.

[0057] Please refer to Figure 4 and Figure 5 , in some embodiments, the extending direction of the first lubricating oil groove 123 is perpendicular to the axis of the short shaft 12. In this way, the machining of the first lubricating oil groove 123 can be positioned based on the axial and radial directions of the short shaft 12, thereby reducing the machining difficulty of the first lubricating oil groove 123 and further improving the forming efficiency of the short shaft 12.

[0058] Among them, the first lubricating oil groove 123 can be extended and arranged along a certain radial direction of the short shaft 12, and the first lubricating oil groove 123 can also be extended and arranged along the circumferential line of the short shaft 12.

[0059] Please refer to Figure 6 , Figure 6 is Figure 5 the enlarged view of part A in

[0060] In this embodiment, by setting the groove wall of the first lubricating oil groove 123 as the first arc surface 1231 and making it tangent to the groove bottom of the first lubricating oil groove 123, it helps to reduce the stress at the connection part between the groove wall of the first lubricating oil groove 123 and the groove bottom of the first lubricating oil groove 123, thereby improving the stress state of the short shaft 12 and further enhancing the reliability of the planetary shaft 1.

[0061] Please refer to Figure 7 , Figure 7It is a partial side view of the long shaft 11 provided in an exemplary embodiment of the present disclosure. In some embodiments, a second lubricating oil groove 112 is provided on the circumferential surface of the long shaft 11.

[0062] It can be understood that mounting holes for mating with the long shaft 11 are provided on the differential housing. By providing the second lubricating oil groove 112, an accommodating space can be formed between the second lubricating oil groove 112 and the hole wall of the mounting hole after the long shaft 11 is installed on the differential housing. This accommodating space can not only accommodate lubricating oil but also provide a flow path for the lubricating oil, thereby improving the lubrication degree of components such as planetary gears.

[0063] Please refer to Figure 1 and Figure 7 . In some embodiments, the extending direction of the second lubricating oil groove 112 is perpendicular to the axis of the long shaft 11. In this way, the machining of the second lubricating oil groove 112 can be positioned based on the axial and radial directions of the long shaft 11, thereby reducing the machining difficulty of the second lubricating oil groove 112 and further improving the forming efficiency of the short shaft 12.

[0064] Among them, the second lubricating oil groove 112 can be extended and arranged along a certain radial direction of the long shaft 11, and the second lubricating oil groove 112 can also be extended and arranged along the circumferential line of the long shaft 11.

[0065] Please refer to Figure 7 and 8 , Figure 8 is Figure 7 The enlarged view of position B in . In some embodiments, the groove wall of the second lubricating oil groove 112 is a second arc surface 1121. One side of the second arc surface 1121 is tangent to the groove bottom of the second lubricating oil groove 112, and the other side is connected to the circumferential surface of the main body 121.

[0066] In this embodiment, by setting the groove wall of the second lubricating oil groove 112 as the second arc surface 1121 and making it tangent to the groove bottom of the second lubricating oil groove 112, it helps to reduce the stress at the connecting part between the groove wall and the groove bottom of the second lubricating oil groove 112, thereby improving the stress state of the short shaft 12 and further enhancing the reliability of the planetary shaft 1.

[0067] In some embodiments, a first pin hole 124 is provided on the short shaft 12, and the first pin hole 124 is configured to cooperate with a first pin shaft fixed on the differential housing; and / or, a second pin hole 113 is provided on the long shaft 11, and the second pin hole 113 is configured to cooperate with a second pin shaft fixed on the differential housing.

[0068] Specifically, a first pin hole 124 is provided on the short shaft 12, or a second pin hole 113 is provided on the long shaft 11, or a first pin hole 124 is provided on the short shaft 12 and a second pin hole 113 is provided on the long shaft 11.

[0069] In this embodiment, by providing the first pin hole 124, the position of the short shaft 12 can be ensured to be fixed, so as to improve the position stability of the short shaft 12 within the differential housing, thereby improving the reliability of the differential transmission.

[0070] In addition, by providing the second pin hole 113, the position of the long shaft 11 can be ensured to be fixed, and the position stability of the long shaft 11 within the differential housing can be improved, thereby improving the reliability of the differential transmission.

[0071] Correspondingly, the present application further provides a differential, including the aforementioned planetary shaft 1.

[0072] It can be understood that the differential further includes a housing, four planetary gears and two half-axle gears. The housing includes a housing body and a cover body, and the housing body and the cover body are covered with each other to define an installation cavity. The planetary shaft 1 is located in the installation cavity, and the four planetary gears are respectively installed at both ends of the two short shafts 12 and the long shaft 11. The two half-axle gears are located in the installation cavity and on both sides of the planetary shaft 1.

[0073] In this embodiment, by adopting the aforementioned planetary shaft 1, on the premise of not affecting the radial strength of the mating part of the long shaft 11 and the short shaft 12, the size of the insertion part 122 can be increased in the non-radial direction of the long shaft 11. In this way, the strength of the part where the short shaft 12 is inserted into the long shaft 11 can be improved, so as to effectively avoid the fracture of the planetary shaft 1 during high-intensity operation, and further improve the reliability of the differential.

[0074] Correspondingly, the present application further provides a vehicle, including the aforementioned differential.

[0075] It can be understood that the vehicle can be a fuel vehicle, a plug-in hybrid vehicle or a new energy vehicle, etc., and the present disclosure does not make specific limitations thereto.

[0076] In this embodiment, by adopting the aforementioned differential, on the premise of not affecting the radial strength of the mating part of the long shaft 11 and the short shaft 12, the size of the insertion part 122 can be increased in the non-radial direction of the long shaft 11. In this way, the strength of the part where the short shaft 12 is inserted into the long shaft 11 can be improved, so as to effectively avoid the fracture of the planetary shaft 1 during high-intensity operation, and further improve the running stability of the vehicle.

[0077] Based on the foregoing embodiments of the planetary shaft 1, after summarizing them, the following planetary shaft 1 is obtained.

[0078] The planetary shaft 1 includes a major axis 11 and a minor axis 12. The minor axis 12 includes a main body 121 and a plug-in portion 122 that are axially connected along the minor axis 12. The plug-in portion 122 is plugged into the major axis 11. The cross-section of the plug-in portion 122 is an isosceles trapezoid, which has a minimum diameter and a maximum diameter. The maximum diameter is parallel to the axis of the major axis 11, and along the plug-in direction, the maximum diameter is axially oppositely arranged with respect to the major axis 11. And the maximum diameter is the same as the diameter of the main body 121. The minimum diameter is perpendicular to the axis of the major axis 11. The circumferential direction of the plug-in portion 122 smoothly transitions from the maximum diameter to the minimum diameter. Along the circumferential direction of the minor axis 12, one end of the main body 121 connected to the plug-in portion 122 smoothly transitions to the plug-in portion 122. A first lubricating oil groove 123 is provided on the circumferential surface of the main body 121. The extending direction of the first lubricating oil groove 123 is perpendicular to the axis of the minor axis 12. Among them, the groove wall of the first lubricating oil groove 123 is a first arc surface 1231. One side of the first arc surface 1231 is tangent to the groove bottom of the first lubricating oil groove 123. The other side is connected to the circumferential surface of the main body 121. A second lubricating oil groove 112 is provided on the circumferential surface of the major axis 11. The extending direction of the second lubricating oil groove 112 is perpendicular to the axis of the major axis 11. Among them, the groove wall of the second lubricating oil groove 112 is a second arc surface 1121, and one side of the second arc surface 1121 is tangent to the groove bottom of the first lubricating oil groove 123, and the other side is connected to the circumferential surface of the main body 121. A first pin hole 124 is provided on the minor axis 12, and the first pin hole 124 is configured to cooperate with a first pin shaft fixed on the differential housing; a second pin hole 113 is provided on the major axis 11, and the second pin hole 113 is configured to cooperate with a second pin shaft fixed on the differential housing. Among them, there are two minor axes 12, and the two minor axes 12 are respectively located on both sides of the major axis 11 and are coaxially arranged. Chamfers are provided at the respective edges of the major axis 11 and the minor axis 12 to avoid stress concentration. For example, a chamfer is provided at the connection between the main body 121 and the plug-in portion 122.

[0079] In the description of the present application, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more features. In the description of the present application, the meaning of "a plurality" is two or more, unless otherwise specifically defined.

[0080] In the above embodiments, the descriptions of the respective embodiments have their own emphases. For parts not detailed in a certain embodiment, reference may be made to the relevant descriptions of other embodiments.

[0081] Among the embodiments, implementation manners and related technical features of the present application, they can be combined and replaced with each other without conflict.

[0082] The above are only the preferred embodiments of the present application and do not impose any formal restrictions on the present application. Although in the present application, the descriptions of each embodiment have their own focuses, for the parts not detailed in a certain embodiment, reference can be made to other embodiments. However, any brief modifications, equivalent changes and decorations made to the above embodiments based on the technical essence of the present application without departing from the content of the technical solution of the present application still fall within the scope of the technical solution of the present application.

Claims

1. A planetary shaft (1), characterized in that: include: Long axis (11); A short shaft (12), comprising a main body (121) and a plug-in portion (122) connected along the axial direction of the short shaft (12), wherein the plug-in portion (122) is plugged into the long shaft (11), and a cross section of the plug-in portion (122) has a minimum diameter and a maximum diameter, and the direction of the maximum diameter is not perpendicular to the axis of the long shaft (11); There are two short axes (12), and the two short axes (12) are respectively located on both sides of the long axis (11) and are coaxially arranged.

2. The planetary shaft (1) according to claim 1, characterized in that The direction of the maximum diameter is parallel to the axis of the long axis (11), and along the plugging direction, the maximum diameter is arranged opposite to the axis of the long axis (11).

3. The planetary shaft (1) according to claim 2, characterized in that The maximum diameter is consistent with the diameter of the body (121).

4. The planetary shaft (1) according to claim 1, characterized in that The direction of the minimum diameter is perpendicular to the axis of the major axis (11).

5. The planetary shaft (1) according to any one of claims 1 to 4, characterized in that: The circumference of the plug-in portion (122) smoothly transitions from the maximum diameter to the minimum diameter.

6. The planetary shaft (1) according to any one of claims 1 to 4, characterized in that: Along the circumferential direction of the short axis (12), one end of the main body (121) connected to the plug-in portion (122) smoothly transitions to the plug-in portion (122).

7. The planetary shaft (1) according to any one of claims 1 to 4, characterized in that: The cross section of the plug-in portion (122) is any one of the following shapes: oval, elliptical, or rectangular.

8. The planetary shaft (1) according to any one of claims 1 to 4, characterized in that: A first lubricating oil groove (123) is provided on the circumferential surface of the main body (121).

9. The planetary shaft (1) according to claim 8, characterized in that The extension direction of the first lubricating oil groove (123) is perpendicular to the axis of the short shaft (12).

10. The planetary shaft (1) according to claim 8, characterized in that The groove wall of the first lubricating oil groove (123) is a first arcuate surface (1231), one side of the first arcuate surface (1231) is tangent to the groove bottom of the first lubricating oil groove (123), and the other side is connected to the circumferential surface of the main body (121).

11. The planetary shaft (1) according to any one of claims 1 to 4, characterized in that: A second lubricating oil groove (112) is provided on the circumferential surface of the long shaft (11).

12. The planetary shaft (1) according to claim 11, characterized in that The extension direction of the second lubricating oil groove (112) is perpendicular to the axis of the long axis (11).

13. The planetary shaft (1) according to claim 12, characterized in that The groove wall of the second lubricating oil groove (112) is a second arcuate surface (1121), one side of the second arcuate surface (1121) is tangent to the groove bottom of the second lubricating oil groove (112), and the other side is connected to the circumferential surface of the main body (121).

14. The planetary shaft (1) according to any one of claims 1 to 4, characterized in that: The short shaft (12) is provided with a first pin hole (124), and the first pin hole (124) is configured to cooperate with a first pin shaft fixed on the differential housing; And / or, a second pin hole (113) is provided on the long shaft (11), and the second pin hole (113) is configured to cooperate with a second pin shaft fixed on the differential housing.

15. A differential, characterized in that: Comprising a planet shaft (1) as claimed in any one of claims 1 to 14.

16. A vehicle, characterized in that: Comprising the differential as claimed in claim 15.

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