Differential and vehicle

Abstract

The application discloses a differential mechanism and a vehicle, and the differential mechanism comprises a driven gear, a first shell and a second shell, wherein the driven gear comprises an inner ring part and an outer ring part, the outer ring part surrounds the inner ring part, and the outer ring part is provided with a power input gear; the first shell and the second shell are connected to two sides of the inner ring part respectively, a rotatable planetary gear is arranged in the first shell, rotatable half shaft gears are arranged in the first shell and the second shell, and the half shaft gears are in mesh transmission with the planetary gear. The differential mechanism of the embodiment of the application can significantly reduce the weight of the differential mechanism assembly through the improvement of the shell of the differential mechanism and the connection mode of the shell of the differential mechanism and the driven gear.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicles, in particular to a differential and a vehicle. BACKGROUND

[0002] The automobile differential is an indispensable device for vehicle transmission and control. The function of the differential is to enable the front axle and the rear axle or the left and right wheels to rotate at different speeds during vehicle turning, thereby ensuring the normal turning of the vehicle. The differential is usually located in the main reducer of the front axle and the rear axle, in the all-time transfer, or in the front-drive transmission and the new energy reducer. Most differentials are arranged at the end of the transmission chain, and therefore bear the maximum torque load.

[0003] In order to ensure strength and reliability, the weight of the differential is usually large. At present, the energy saving and emission reduction pressure of fuel vehicles and the endurance pressure of new energy vehicles need to be focused on lightweighting, and the strength and reliability need to be ensured. However, it is often difficult to ensure lightweighting while ensuring strength and reliability. SUMMARY

[0004] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, one object of the present application is to provide a differential, which can significantly reduce the weight of the differential assembly through improvements in the differential housing and the connection mode between the differential housing and the driven gear.

[0005] The differential according to the embodiment of the present application comprises: a driven gear, which comprises an inner ring portion and an outer ring portion, the outer ring portion surrounds the outer ring portion, and the outer ring portion is provided with a power input tooth; a first housing and a second housing, the first housing and the second housing are respectively connected to the two sides of the inner ring portion, a rotatable planetary gear is arranged in the first housing, and a rotatable half shaft gear is arranged in the first housing and the second housing, and the half shaft gear is in meshing transmission with the planetary gear.

[0006] According to the differential provided by the embodiment of the present application, the driven gear is divided into an inner ring portion and an outer ring portion with a power input tooth, the outer ring surrounds the outer ring, the first housing and the second housing are connected through the inner ring portion, the thickness requirement of the conventional blind hole arranged in the outer ring portion can be reduced, the overall thickness of the driven gear can be greatly reduced, the weight of the driven gear can be reduced, and the overall weight of the differential can be reduced.

[0007] According to the differential provided by the embodiment of the present application, one side of the inner ring portion is formed with a positioning groove, and the end of the first housing extends into the positioning groove.

[0008] The inner wall of the positioning groove is provided with a connecting through hole, the first shell and the second shell are each provided with a connecting hole which is opposite to the connecting through hole, and the connecting through hole and the connecting hole are used for penetrating a connecting piece.

[0009] The end of the first shell is provided with a plurality of connecting columns which are distributed at intervals in the circumferential direction of the first shell, and the connecting columns are provided with the connecting holes.

[0010] At least one of the connecting holes corresponding to the plurality of connecting columns is a threaded blind hole, and at least one is a threaded through hole.

[0011] The first shell is provided with a reinforcing rib between two adjacent connecting columns.

[0012] The first shell is provided with a plurality of lightening holes which are distributed at intervals in the circumferential direction of the first shell.

[0013] The first shell is provided with a short planetary gear shaft and a long planetary gear shaft, and the short planetary gear shaft and the long planetary gear shaft are vertically crossed and distributed, and the short planetary gear shaft and the long planetary gear shaft are each sleeved with the planetary gear.

[0014] The first shell and the half shaft gear are provided with a half shaft gear gasket, and the planetary gear and the second shell are provided with a planetary gear gasket.

[0015] The embodiment of the present application also discloses a vehicle.

[0016] The vehicle according to the embodiment of the present application is provided with the differential of any one of the above.

[0017] Additional aspects and advantages of the present application will be in part apparent and in part pointed out below. BRIEF DESCRIPTION OF DRAWINGS

[0018] The above and / or additional aspects and advantages of the present application will become apparent and be readily understood from the following description, taken in conjunction with the accompanying drawings, in which:

[0019] Figure 1 is a schematic view of a differential assembly of an embodiment of the present application;

[0020] Figure 2 is a schematic view of another angle of a differential assembly of an embodiment of the present application;

[0021] Figure 3 is a cross-sectional view of the differential assembly of the present embodiment along the long planetary gear shaft;

[0022] Figure 4 is a cross-sectional view of the differential assembly of the present embodiment along the short planetary gear shaft;

[0023] Figure 5 is a cross-sectional view of the differential assembly of the present embodiment along the first housing and the second housing connected by the connecting piece;

[0024] Figure 6 is a perspective view of the first housing of the differential assembly of the present embodiment;

[0025] Figure 7 is another perspective view of the first housing of the differential assembly of the present embodiment from another angle;

[0026] Figure 8 is a perspective view of the reverse side of the second housing of the present embodiment;

[0027] Figure 9 is a perspective view of the front side of the second housing of the present embodiment;

[0028] Figure 10 is a perspective view of the reverse side of the driven gear of the present embodiment;

[0029] Figure 11 is a perspective view of the front side of the driven gear of the present embodiment;

[0030] Figure 12 is a structural view of the long planetary gear shaft of the present embodiment;

[0031] Figure 13 is a structural view of the short planetary gear shaft of the present embodiment;

[0032] Figure 14 is a perspective view of the reverse side of the half shaft gear of the present embodiment;

[0033] Figure 15 is a perspective view of the front side of the half shaft gear of the present embodiment;

[0034] Figure 16 is a structural view of the front side of the planetary gear of the present embodiment;

[0035] Figure 17 is a structural view of the reverse side of the planetary gear of the present embodiment;

[0036] Figure 18 is a structural view of the half shaft gear spacer of the present embodiment;

[0037] Figure 19 is a structure diagram of the pin connecting the first housing and the short planetary gear shaft of the embodiment of the present application;

[0038] Figure 20 is a structure diagram of the planetary gear washer of the embodiment of the present application;

[0039] Figure 21 is a structure diagram of the planetary gear and the connection of the short planetary gear shaft and the long planetary gear shaft of the embodiment of the present application;

[0040] Figure 22 is a structure diagram of the differential assembly of the embodiment of the present application except the housing;

[0041] Figure 23 is a structure diagram of the differential assembly of the embodiment of the present application except the housing from another angle.

[0042] Reference signs:

[0043] Differential assembly 100,

[0044] Second housing 1, connecting piece 11, connecting piece mating surface 12, cylindrical surface 13, second bearing positioning surface 14, second positioning stop 15, second flange end surface 16, second inner end surface 17, bolt through hole 18,

[0045] Planetary gear 2, first inner hole 21, spherical positioning surface 22, planetary gear tooth 23, planetary gear washer 3,

[0046] Driven gear 4, second inner hole 41, left flange end surface 42, connecting through hole 43, right flange end surface 44, power input tooth 45, positioning groove 46,

[0047] Long planetary gear shaft 5, first outer cylindrical surface 51, groove 52,

[0048] First housing 6, first flange end surface 61, first positioning stop 62, lock pin hole 63, threaded blind hole 64, threaded through hole 65, spherical surface 66, short planetary gear shaft mounting hole 67, long planetary gear shaft mounting hole 68, weight reduction hole 69, first inner end surface 610, long threaded hole column 611, short threaded hole column 612, first reinforcing rib 613, bearing mounting cylindrical surface 614, first bearing positioning surface 615, second reinforcing rib 616,

[0049] Half shaft gear washer 7, half shaft gear 8, positioning surface 81, inner spline hole 82, half shaft gear tooth 83,

[0050] Short planetary gear shaft 9, second outer cylindrical surface 91, positioning hole 92, protrusion 93, pin 10. DETAILED DESCRIPTION

[0051] Embodiments of the present application are described below in detail, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary only, for the purpose of explanation, and are not to be understood as limiting the present application.

[0052] The differential according to the embodiments of the present application is described below with reference to Figures 1-23 The differential according to the embodiments of the present application is described below with reference to The differential according to the embodiments of the present application is described below with reference to

[0053] As shown in the drawings, the differential according to the embodiments of the present application comprises a passive gear 4, a first housing 6 and a second housing 1, the passive gear 4 comprises an inner ring portion and an outer ring portion, the outer ring portion surrounds the inner ring portion, and the outer ring portion is provided with power input teeth 45; the first housing 6 and the second housing 1 are respectively connected to the two sides of the inner ring portion, the first housing 6 is provided with rotatable planetary gears 2, and the first housing 6 and the second housing 1 are both provided with rotatable half shaft gears 8, and the half shaft gears 8 are engaged with the planetary gears 2 for transmission. Figures 1-23 In practice, as shown in the drawings, the passive gear 4 and the differential are integrated into a differential assembly 100, and the housing of the differential is changed into two separate parts, as shown in the drawings, the two parts of the housing are the first housing 6 and the second housing 1, and the inner ring portion of the passive gear 4 is

[0054] Figure 10 Figure 11 Figures 3-9 Figure 10 Figure 11 ​​​​The first housing 6 and the second housing 1 are located on both sides of the passive gear 4 and connected with the passive gear 4 at the inner ring part, while the prior art passive gear 4 is usually designed as a blind hole at the back where the power input teeth 45 are located when connected with the external structure, so as to facilitate the connection of the passive gear 4 with other structures, which requires that the position where the power input teeth 45 of the passive gear 4 are located has a relatively large thickness to ensure the strength. However, the passive gear 4 of the present application is connected with the external structure at the inner ring part of the passive gear 4, so that the thickness of the position where the power input teeth 45 of the passive gear 4 are located can be greatly reduced, thereby reducing the weight of the passive gear 4. The first housing 6 is internally provided with the planetary gear 2 and the half shaft gear 8, wherein the planetary gear 2 is used for transmitting the action force, and the half shaft gear 8 is also used for transmitting the action force while changing the transmission direction of the force.

[0055] In addition, as shown in Figures 3-5 , the diameters of the first housing 6 and the second housing 1 are smaller than the diameter of the passive gear 4, which can reduce the weight of the overall differential housing, and in combination with the reduction of the weight of the passive gear 4, the weight of the differential assembly 100 is reduced, so that the structure of the embodiment of the present application is compact and lightweight.

[0056] In some embodiments, as shown in Figure 3 , Figure 6 and Figure 11 , a positioning groove 46 is formed on one side of the inner ring part, and the end of the first housing 6 extends into the positioning groove 46. By providing the positioning groove 46 on the inner ring part, the first housing 6 can be quickly and initially positioned when installed with the passive gear 4, and the first housing 6 can also be conveniently installed with the inner ring part of the passive gear 4 after positioning.

[0057] In some embodiments, as shown in Figure 10 and Figure 11 , the inner wall of the positioning groove 46 is provided with a connecting through hole 43, as shown in Figure 6 and Figure 8 , the first housing 6 and the second housing 1 are each provided with a connecting hole opposite to the connecting through hole 43, and the connecting hole of the first housing 6 is the threaded through hole 65 and the threaded blind hole 64 in Figure 6 , and the connecting hole of the second housing 1 is the bolt via hole 18 in Figure 8 and Figure 9 , the connecting through hole 43 and the corresponding connecting holes of the first housing 6 and the second housing 1 are used for penetrating the connecting piece 11, and the connecting piece 11 is generally a bolt, as shown in Figure 5 , which is used to connect the first housing 6, the second housing 1 and the passive gear 4.

[0058] In actuality, the passive gear 4 includes a middle second inner hole 41, and the inner ring part of the passive gear 4 is respectively provided with a left flange end face 42 and a right flange end face 44, a connecting through hole 43 is arranged through the left flange end face 42 and the right flange end face 44 of the inner ring part, a power input tooth 45 is arranged at the periphery of the inner ring part, and the connecting through hole 43 is distributed along the periphery of the inner ring part at intervals; in combination with Figure 6 and Figure 7 As shown in the drawings, the first shell 6 includes a spherical surface 66 and a bearing mounting cylindrical surface 614, the periphery of the bearing mounting cylindrical surface 614 includes a first bearing positioning surface 615 for positioning the installed bearing, and the inner periphery of the spherical surface 66 is a first positioning stop 62, which extends outward along the periphery of the first positioning stop 62 to form a first flange end face 61 of the first shell 6, and the first flange end face 61 is provided with a plurality of threaded through holes 65 or threaded blind holes 64.

[0059] In combination with Figure 8 and Figure 9 As shown in the drawings, the second shell 1 is provided with a second positioning stop 15 in the middle, which extends outward along the periphery to form a second flange end face 16, and the second flange end face 16 is provided with a plurality of bolt through holes 18; one side of the second flange end face 16 is provided with a cylindrical surface 13 with a smaller diameter than the second positioning stop 15, the periphery of the cylindrical surface 13 is provided with a second bearing positioning surface 14 for positioning the installed bearing, and the side of the second flange end face 16 close to the cylindrical surface 13 is a connecting piece matching surface 12, which can be used to match the connecting piece 11.

[0060] So, when the passive gear 4 is mounted with the first shell 6 and the second shell 1, first, the inner periphery of the first positioning stop 62 and the bearing mounting cylindrical surface 614 of the first shell 6 are coaxially centered with the second inner hole 41 of the passive gear 4 and the second positioning stop 15 of the second shell 1, the first flange end face 61 of the first shell 6 is attached to the right flange end face 44 of the passive gear 4, and the threaded blind hole 64 and the threaded through hole 65 of the first shell 6 are aligned with the connecting through hole 43 of the passive gear 4. The second positioning stop 15 of the second shell 1 cooperates with the second inner hole 41 of the passive gear 4 to play a coaxial centering role, the second flange end face 16 of the second shell 1 is attached to the left flange end face 42 of the passive gear 4, and the bolt through hole 18 of the second shell 1 is aligned with the connecting through hole 43 of the passive gear 4; the connecting piece 11 passes through the connecting through hole 43 of the passive gear 4 from the bolt through hole 18 of the second shell 1 and then enters the threaded through hole 65 or the threaded blind hole 64 of the first shell 6, so as to achieve the fastening connection between the first shell 6, the passive gear 4 and the second shell 1, and press the second shell 1, the passive gear 4 and the first shell 6 to realize the integrated connection of the three, transmit power and bear load through the static friction force generated by the attached surface, and the selection of the structure of the first shell 6 and the second shell 1 can facilitate the connection of the two, and also facilitate the integrated arrangement of the planetary gear 2 inside the first shell 6.

[0061] In some embodiments, the end of the first shell 6 is provided with a plurality of connecting columns which are distributed at intervals in the circumferential direction of the first shell 6, and the connecting columns are provided with connecting holes. The connecting column is the outer contour structure of the threaded through hole 65 and the threaded blind hole 64 described above. Compared with other parts of the first shell 6, the threaded through hole 65 and the threaded blind hole 64 use more material and have a thicker thickness, and form the connecting column, which can enhance the strength of the connecting part of the first shell 6 and also facilitate installation. The connecting hole is the threaded through hole 65 or the threaded blind hole 64 described above.

[0062] In some embodiments, at least one of the connecting holes corresponding to the plurality of connecting columns is a threaded blind hole 64 and at least one is a threaded through hole 65. In this way, the threaded blind hole 64 and the threaded through hole 65 are arranged in cooperation, which meets the connection requirement, and the outer contour of the threaded blind hole 64 forms a long threaded hole column 611, and the outer contour of the threaded through hole 65 forms a short threaded hole column 612. The use of the two can not only ensure better strength and support performance of the long threaded hole column 611 of the threaded blind hole 64, but also enable the short threaded hole column 612 formed by the outer contour of the threaded through hole 65 to have a lighter weight while assisting in bearing on the basis of ensuring strength and support performance.

[0063] In some embodiments, the first shell 6 is provided with a reinforcing rib between adjacent two connecting columns. Continue to refer to Figure 6 and Figure 7As shown, the types of reinforcing ribs include first reinforcing ribs 613 and second reinforcing ribs 616, the second reinforcing ribs 616 are arranged between two adjacent long threaded hole columns 611 and two adjacent short threaded hole columns 612, and the first reinforcing ribs 613 are arranged on one side of the long threaded hole column 611 close to the bearing mounting cylindrical surface 614. The long threaded hole column 611 and the threaded blind hole 64 inside it are mainly used for important structures of the main body bearing and supporting, and the arrangement of the first reinforcing ribs 613 can further enhance the strength of the first housing 6 and the strength of the connection between the first housing 6 and the passive gear 4 and the second housing 1. The arrangement of the second reinforcing ribs 616 between two adjacent long threaded hole columns 611 and two adjacent short threaded hole columns 612 can enhance the strength and auxiliary bearing capacity of the first housing 6, meet the strength, and achieve the effect of light weight. Moreover, it can also increase the bonding area of the first flange end face 61.

[0064] In some embodiments, the first housing 6 is provided with a plurality of lightening holes 69 which are distributed at intervals in the circumferential direction of the first housing 6; and the lightening holes 69 are arranged in the non-power transmission area. The arrangement of the lightening holes 69 can make the first housing 6 lighter in weight as a whole and use less material in total, and at the same time, since the lightening holes 69 are arranged in the non-power transmission area, it does not affect the overall power transmission.

[0065] In some embodiments, the first housing 6 is provided with a short planetary gear shaft 9 and a long planetary gear shaft 5, and the short planetary gear shaft 9 and the long planetary gear shaft 5 are vertically intersected and distributed, and the short planetary gear shaft 9 and the long planetary gear shaft 5 are both sleeved with a planetary gear 2.

[0066] In practice, as shown in Figure 12 , Figure 13 and Figure 21 , the long planetary gear shaft 5 includes a first outer cylindrical surface 51, and at least two grooves 52 are arranged around the middle position of the first outer cylindrical surface 51. The short planetary gear shaft 9 includes a second outer cylindrical surface 91, and a protrusion 93 is arranged at one end of the second outer cylindrical surface 91 of the short planetary gear shaft 9. Two short planetary gear shafts 9 are respectively installed at the grooves 52 on both sides of one long planetary gear shaft 5 through the protrusions 93. Each short planetary gear shaft 9 is sleeved with a planetary gear 2, and the long planetary gear shaft 5 is sleeved with two planetary gears 2, and the two planetary gears 2 on the long planetary gear shaft 5 are located on both sides of the connection between the grooves 52 and the protrusions 93.

[0067] The first shell 6 is provided with two short planetary gear shaft mounting holes 67 and two long planetary gear shaft mounting holes 68, the connecting line of the two short planetary gear shaft mounting holes 67 is perpendicular to the connecting line of the centers of the two long planetary gear shaft mounting holes 68, one end of each short planetary gear shaft 9 is connected with the long planetary gear shaft 5, the other end is connected at the short planetary gear shaft mounting hole 67 of the first shell 6, and the two ends of the long planetary gear shaft 5 are both mounted at the two long planetary gear shaft mounting holes 68 of the first shell 6; and the first shell 6 is connected with the passive gear 4 and the second shell 1, so that the structure of the embodiment of the application is compact, the integration degree is high, and space is saved.

[0068] In addition, the end of each short planetary gear shaft 9 away from the long planetary gear shaft 5 is also provided with a positioning hole 92, the first flange end face 61 of the first shell 6 is also provided with a lock pin hole 63, the short planetary gear shaft 9 extends out of the first shell 6, and the first shell 6 is connected with the short planetary gear shaft 9 at the positioning hole 92 through the pin 10, so that the end of the short planetary gear shaft 9 is fixed, the firmness of the connection of the short planetary gear shaft 9 is ensured, and the long planetary gear shaft 5 is directly inserted into the long planetary gear shaft mounting hole 68 of the first shell 6. The above structure makes the power transmission path of the embodiment of the application shorter, achieves the effect of lighter weight, and the power transmission path is shown in the cutting head in Figure 3 The power is transmitted to the long planetary gear shaft 5 through the passive gear 4, then transmitted to the planetary gear 2 through the long planetary gear shaft 5 and the short planetary gear shaft 9, and the planetary gear 2 distributes the power to the half shaft gears 8 on both sides. It should be noted that the above non-power transmission area is the area outside the position where the long planetary gear shaft 5 and the short planetary gear shaft 9 are mounted on the first shell 6.

[0069] The half shaft gear 8 includes a positioning face 81, an inner spline hole 82 and a half shaft gear tooth 83, the half shaft gear tooth 83 is located on one side of the positioning face 81, as shown in Figure 22 The half shaft gear tooth 83 and the four planetary gears 2 are all engaged, which is used for forming differential function with the planetary gear 2 and changing the transmission direction of the force.

[0070] In some embodiments, as shown in Figure 3 The first shell 6 is provided with a half shaft gear gasket 7 between the first shell 6 and the half shaft gear 8, and the planetary gear gasket 3 between the planetary gear 2 and the second shell 1.

[0071] As shown in Figure 3 , Figure 14 and Figure 15 The second inner end face 17 of the second shell 1 is attached to the half shaft gear gasket 7, the positioning face 81 of the half shaft gear 8 is attached to the other face of the half shaft gear gasket 7, and the other side, Figure 6In the embodiment, the first inner end face 610 of the first housing 6 is attached to the half shaft gear 8, and the locating face 81 of the half shaft gear 8 is attached to the other face of the half shaft gear gasket 7. Figure 3 、 Figure 16 、 Figure 17 As shown in the figure, the planetary gear 2 comprises a spherical locating face 22, a first inner hole 21 and planetary gear teeth 23, the spherical locating face 22 of the four planetary gears 2 is attached to the four planetary gear gaskets 3, and the planetary gear gasket 3 is matched with the spherical face 66 of the first housing 6; the half shaft gear gasket 7 plays a role of supporting the half shaft gear 8, reducing friction and adjusting the meshing gap between the half shaft gear 8 and the planetary gear 2, and the planetary gear gasket 3 is used to reduce the friction between the first housing 6 and the planetary gear 2.

[0072] The embodiment of the application further discloses a vehicle.

[0073] The vehicle according to the embodiment of the application is provided with the differential of any one of the above. The vehicle and the differential have the same advantages as the prior art, and will not be described here.

[0074] In the description of the application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the application.

[0075] In the description of the application, "first feature" and "second feature" can include one or more features.

[0076] In the description of the application, "a plurality of" means two or more.

[0077] In the description of the application, "above" or "below" the first feature of the second feature can include that the first and second features are in direct contact, or can include that the first and second features are not in direct contact but are in contact through another feature between them.

[0078] In the description of the application, "above", "above" and "above" of the first feature of the second feature include that the first feature is directly above and obliquely above the second feature, or only means that the first feature is higher than the second feature in height.

[0079] In the description of the specification, reference to "one embodiment", "some embodiments", "an exemplary embodiment", "an example", "a specific example", or "some examples" means that a particular feature, structure, material, or characteristic being described is included in at least one embodiment or example of the application. The appearances of the phrases "in one embodiment", "in some embodiments", "in an exemplary embodiment", "an example", "a specific example", or "some examples" in various places in the specification are not necessarily referring to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples.

[0080] Although embodiments of the application have been illustrated and described, it will be clear to those of ordinary skill in the art that various changes, modifications, substitutions, and alterations can be made therein without departing from the principles and the spirit of the application. The scope of the application is limited only by the claims and the equivalents thereof.

Claims

1. A differential characterized in that, The differential comprises: a passive gear comprising an inner ring portion and an outer ring portion, the outer ring portion surrounding the inner ring portion, the outer ring portion being provided with power input teeth; a first housing and a second housing, the first housing and the second housing being respectively connected to two sides of the inner ring portion, the first housing being provided with a rotatable planetary gear, and the first housing and the second housing being respectively provided with a rotatable half shaft gear, the half shaft gear being in meshing transmission with the planetary gear; an end portion of the first housing being provided with a plurality of connecting columns, the connecting columns being distributed in a circumferential direction of the first housing, the connecting columns being provided with connecting holes; at least one of the connecting holes corresponding to each of the connecting columns is a threaded blind hole, and at least one is a threaded through hole, an outer contour of the connecting column formed by the threaded blind hole being a long threaded hole column, and an outer contour of the connecting column formed by the threaded through hole being a short threaded hole column; the first housing is provided with a reinforcing rib between adjacent two connecting columns, the reinforcing rib including a first reinforcing rib and a second reinforcing rib, the second reinforcing rib being arranged between adjacent two long threaded hole columns and adjacent two short threaded hole columns, and the first reinforcing rib being arranged on a side of the long threaded hole column close to a bearing mounting cylindrical surface; the first housing is provided with a plurality of lightening holes, the lightening holes being distributed in the circumferential direction of the first housing.

2. The differential of claim 1, wherein, one side of the inner ring portion is formed with a positioning recess, and an end portion of the first housing extends into the positioning recess.

3. The differential of claim 2, wherein, an inner wall of the positioning recess is provided with a connecting through hole, the first housing and the second housing are respectively provided with a connecting hole opposite to the connecting through hole, and the connecting through hole and the connecting hole are used for penetrating a connecting member.

4. The differential of claim 1, wherein, the first housing is provided with a short planetary gear shaft and a long planetary gear shaft, and the short planetary gear shaft and the long planetary gear shaft are vertically crossed and distributed, the short planetary gear shaft and the long planetary gear shaft being respectively sleeved with the planetary gear.

5. The differential of claim 1, wherein, a half shaft gear gasket is arranged between the first housing and the half shaft gear, and a planetary gear gasket is arranged between the planetary gear and the second housing.

6. A vehicle characterized by comprising: the differential is provided with any one of claims 1-5.

Images