Differential assembly and vehicle

Abstract

The differential assembly comprises a protective shell and a differential, the differential is mounted in the protective shell and comprises a shell and a planetary gear train mounted in the shell, the shell is rotatably mounted in the protective shell, an opening is formed in the shell, an oil guide channel is formed in the protective shell, and the planetary gear train is mounted in the shell. And an outlet of the oil guide channel faces the opening of the shell. According to the differential assembly provided by the embodiment of the utility model, the oil guide channel is arranged on the protective shell, and the outlet of the oil guide channel faces the opening of the shell, so that lubricating oil can be actively injected into the shell through the oil guide channel even if the differential driven jaw disc and the differential driving jaw disc are in a separated state; lubricating oil can be sprayed to the open hole after passing through the oil guide channel, and then enters the shell from the open hole, so that the planetary gear train in the shell is lubricated, and the planetary gear train in the shell is always kept in a better lubricating and cooling state.

Description

TECHNICAL FIELD

[0001] The utility model relates to vehicle technical field especially is related to a differential assembly and vehicle. BACKGROUND

[0002] The basic structure of the differential includes a housing, one or more gear sets (planetary gears and sun gears, etc.), and half shafts that deliver power to the wheels. When a vehicle is traveling in a straight line, the left and right wheels need to rotate at the same speed; when the vehicle is turning, the outer wheels must rotate faster than the inner wheels because the outer wheels travel a longer path. The differential achieves this by adjusting the speed difference between the left and right wheels.

[0003] However, the lubrication and cooling effect of the differential in the related art still needs to be further improved. SUMMARY

[0004] The utility model discloses at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to provide a differential assembly, which keeps the planetary gear train inside the housing in a better lubrication and cooling state.

[0005] The differential assembly according to the utility model embodiment comprises a protective shell and a differential, the differential is installed in the protective shell, the differential comprises a housing and a planetary gear train installed in the housing, the housing is rotatably installed in the protective shell, and the housing is provided with an opening, wherein the protective shell is provided with an oil guide channel, and the outlet of the oil guide channel faces the opening of the housing.

[0006] According to the differential assembly of the utility model embodiment, the oil guide channel is arranged on the protective shell, the outlet of the oil guide channel faces the opening of the housing, so that even when the driven disc and the driving disc of the differential are separated from each other, the oil guide channel can actively inject lubricating oil into the housing, the lubricating oil can be sprayed into the opening after passing through the oil guide channel, and then enter the housing, thereby completing the lubrication of the planetary gear train in the housing, so that the planetary gear train in the housing is kept in a better lubrication and cooling state.

[0007] In addition, the differential assembly according to the utility model can also have the following additional technical features:

[0008] In some embodiments of the utility model, the shell includes detachable first shell and second shell, the planetary gear system is installed in the first shell, the second shell is used for covering the planetary gear system in the first shell, the first shell has the first opening, and multiple first openings are arranged.

[0009] In some embodiments of the utility model, the protective shell is provided with an oil injection pipe, and the oil injection pipe is provided with a first oil guide channel.

[0010] In some embodiments of the utility model, the oil injection pipe has multiple oil outlet holes, and the oil outlet directions of at least two of the multiple oil outlet holes are different.

[0011] In some embodiments of the utility model, the oil injection pipe extends along the rotation axis direction of the shell and is located on one side of the first shell in the radial direction, and the oil outlet holes are all located on the side of the oil injection pipe facing the first shell.

[0012] In some embodiments of the utility model, the second shell has the second opening, multiple second openings are arranged, multiple second openings are arranged around the rotation axis of the shell, the protective shell has the second oil guide channel, and the outlet of the second oil guide channel faces the second opening.

[0013] In some embodiments of the utility model, the outlet of the second oil guide channel is located on the side of the second shell away from the first shell, the side of the second shell away from the first shell is provided with a convex ring around the rotation axis, the side of the convex ring away from the rotation axis is provided with a first oil guide groove around the rotation axis, and the first oil guide groove is communicated with the second opening.

[0014] In some embodiments of the utility model, the inner wall of at least one second opening is provided with a second oil guide groove, the second oil guide groove is connected with the first oil guide groove, and the second oil guide groove is used for guiding the oil in the first oil guide groove into the shell.

[0015] In some embodiments of the utility model, the second oil guide groove extends along the axial direction of the shell and is located at the position close to the rotation axis of the second opening.

[0016] In some embodiments of the utility model, the side of the second shell facing the first shell is provided with a third oil guide groove, and the third oil guide groove is communicated with the second oil guide groove.

[0017] In some embodiments of the utility model, the third oil guide groove extends to the shaft hole of the second shell along the radial direction.

[0018] In some embodiments of the utility model, the first oil guide groove, the second oil guide groove and the third oil guide groove are at least one, the direction of the groove bottom to the groove mouth, at least one of the two opposite side walls is inclined to the direction of moving away from each other.

[0019] In some embodiments of the utility model, the second oil guide channel includes a first section, a second section and a third section, the first section and the third section are spaced apart along the radial direction, the second section is communicated between the first section and the third section, the first section has the outlet towards the second opening at one end away from the second section, the third section has a first oil inlet at one end away from the second section, wherein the differential assembly further includes a main reduction driven gear sleeved on the shell, the first oil inlet is located on the radial outer side of the main reduction driven gear.

[0020] In some embodiments of the utility model, the second oil guide channel further includes a fourth section, the fourth section is connected with the second section, one end of the fourth section away from the second section has a second oil inlet communicated with the external space, wherein the first section and the third section are parallel and both extend along the axial direction, the second section and the fourth section are collinear and both extend along the radial direction.

[0021] In some embodiments of the utility model, the flow cross section of the first section is smaller than the flow cross section of the second section.

[0022] The utility model further provides a vehicle with the differential assembly of the above-mentioned embodiments.

[0023] According to the vehicle of the utility model embodiment, by being provided with the differential assembly of the above-mentioned embodiments, the differential assembly can better control the wheels on both sides of the vehicle to rotate at the same speed or at different speeds, and has high reliability and good stability.

[0024] Additional aspects and advantages of the utility model will be in part apparent and in part pointed out hereinafter. BRIEF DESCRIPTION OF DRAWINGS

[0025] The above and / or additional aspects and advantages of the utility model will become apparent and more readily appreciated from the following description of the embodiments, with reference to the following drawings, in which:

[0026] Figure 1 It is the sectional view of omitting the first protective shell according to the differential assembly of the utility model embodiment.

[0027] Figure 2is a structural schematic view of a differential and a main reduction driven gear of a differential assembly according to an embodiment of the utility model.

[0028] Figure 3 is a structural schematic view of an oil injection pipe of a differential assembly according to an embodiment of the utility model.

[0029] Figure 4 is a structural schematic view of a second housing of a differential assembly according to an embodiment of the utility model.

[0030] Figure 5 is Figure 4 is an enlarged view of area A.

[0031] Figure 6 is a sectional view of a second housing of a differential assembly according to an embodiment of the utility model.

[0032] Figure 7 is Figure 6 is an enlarged view of area B.

[0033] Figure 8 is a structural schematic view of a differential of a differential assembly according to an embodiment of the utility model.

[0034] Figure 9 is a sectional view of a differential assembly omitting a second protective shell according to an embodiment of the utility model.

[0035] Reference signs:

[0036] 100, differential assembly;

[0037] 1, protective shell; 11, first protective shell; 12, second protective shell; 13, oil injection pipe; 131, oil outlet hole; 14, second oil guide channel; 141, first section; 142, second section; 143, third section; 144, fourth section;

[0038] 2, differential; 21, housing; 211, first housing; 2111, first opening; 212, second housing; 2121, second opening; 2122, convex ring;

[0039] 22, planetary gear train; 221, first half shaft gear; 222, second half shaft gear; 223, planetary gear; 224, planetary gear shaft; 225, differential driving cog disc; 226, differential driven cog disc; 227, cylindrical pin; 228, spherical pad;

[0040] 23, first bearing; 24, second bearing; 25, main reduction driven gear;

[0041] 31, first oil guide groove; 32, second oil guide groove; 33, third oil guide groove; 34, shaft hole. DETAILED DESCRIPTION

[0042] The 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, and are merely intended to explain the present application, and cannot be understood as limiting the present application.

[0043] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features limited by "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specifically limited.

[0044] In the description of the present application, it should be noted that, unless otherwise specifically defined and limited, the terms "mounting", "connecting", "connection" should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0045] Reference is made below to Figures 1-9 A differential assembly 100 according to an embodiment of the present application is described.

[0046] As shown in Figure 1 and Figure 9 The differential assembly 100 according to an embodiment of the present application includes a protective shell 1 and a differential 2, the differential 2 is mounted in the protective shell 1, the protective shell 1 includes a first protective shell 11 and a second protective shell 12, the differential 2 includes a housing 21 and a planetary gear train 22 mounted in the housing 21, the housing 21 is rotatably mounted in the protective shell 1, and the housing 21 is provided with an opening, wherein the protective shell 1 is provided with an oil guide channel, and the outlet of the oil guide channel faces the opening of the housing 21.

[0047] The differential 2 is an important component in the automobile transmission system, which is mainly used to allow the left and right wheels to rotate at different speeds when the vehicle turns, so as to ensure good contact of the tires with the ground and avoid slipping or excessive wear. The differential 2 is usually installed on the drive axle, connecting the transmission shaft of the engine and the wheels.

[0048] The basic structure of the differential 2 includes a housing 21, one or more gear sets (planetary gears 223 and sun gears, etc.), and half shafts that transmit power to the wheels. When the vehicle travels straight, the left and right wheels need to rotate at the same speed; when the vehicle turns, the outer wheels must rotate faster than the inner wheels because the outer wheels travel a longer path. The differential 2 achieves this by adjusting the speed difference between the left and right wheels.

[0049] For a specific example, refer to Figure 1 and Figure 9 The differential 2 includes a housing 21 and a planetary gear train 22 installed in the housing 21, the planetary gear train 22 including a first half shaft gear 221, a second half shaft gear 222, a planetary gear 223, a planetary gear shaft 224, a differential driving cog disc 225, a differential driven cog disc 226, a cylindrical pin 227, and a spherical pad 228. The differential 2 also includes a first bearing 23, a second bearing 24, and a main reduction driven gear 25. The housing 21 can be rotatably installed in the protective shell 1 through the first bearing 23 and the second bearing 24, and the main reduction driven gear 25 is sleeved on the outer peripheral side of the housing 21.

[0050] Further, the planetary gear 223 is rotatably sleeved on the planetary gear shaft 224, and in the direction of the rotation axis of the housing 21, the planetary gear 223 is engaged between the first half shaft gear 221 and the second half shaft gear 222. The planetary gear 223 can be in driving connection with the differential driven cog disc 226, and the differential driven cog disc 226 can move relative to the differential driving cog disc 225 along the direction of the rotation axis, so that the differential driven cog disc 226 and the differential driving cog disc 225 switch between the meshing state of mutual engagement and the separation state of mutual separation.

[0051] Further, the spherical pad 228 is arranged between the planetary gear 223 and the housing 21, and the cylindrical pin 227 is arranged between the planetary gear shaft 224 and the housing 21.

[0052] When the differential driven gear disc 226 and the differential driving gear disc 225 are in the meshing state of mutual meshing, the main reduction driven gear 25 can rotate, at this time, the main reduction driven gear 25 can stir the lubricating oil in the housing 21, and the lubricating oil can enter the inside of the housing 21 well, lubricating the planetary gear train 22 in the housing 21, however, when the differential driven gear disc and the differential driving gear disc 225 of the differential 2 are in the separation state of mutual separation, the transmission connection between the planetary gear train 22 and the main reduction driven gear 25 is disconnected, at this time, the main reduction driven gear 25 cannot stir the lubricating oil in the housing 21, and the lubrication and cooling effect of the planetary gear train 22 in the housing 21 is not good.

[0053] In the present application, the oil guide channel is arranged on the protective shell 1, and the outlet of the oil guide channel faces the opening of the housing 21, so that when the differential driven gear disc 226 and the differential driving gear disc 225 are in the separation state of mutual separation, lubricating oil can be actively injected into the housing 21 through the oil guide channel, and the lubricating oil can be sprayed to the opening after passing through the oil guide channel, and then enter the inside of the housing 21 from the opening, thereby completing the lubrication and cooling of the planetary gear train 22 in the housing 21, so that the differential driven gear disc and the differential driving gear disc 225 of the differential 2 can also be well lubricated and cooled when they are in the separation state of mutual separation.

[0054] According to the differential assembly 100 of the embodiment of the present application, the oil guide channel is arranged on the protective shell 1, and the outlet of the oil guide channel faces the opening of the housing 21, so that even when the differential driven gear disc 226 and the differential driving gear disc 225 are in the separation state of mutual separation, lubricating oil can be actively injected into the housing 21 through the oil guide channel, and the lubricating oil can be sprayed to the opening after passing through the oil guide channel, and then enter the inside of the housing 21 from the opening, thereby completing the lubrication of the planetary gear train 22 in the housing 21, so that the planetary gear train 22 in the housing 21 can always be kept in a good lubrication and cooling state.

[0055] In some embodiments of the present application, as shown in Figure 1 , Figure 2 and Figure 9 , the housing 21 comprises a first housing 211 and a second housing 212 which are detachably connected, the planetary gear train 22 is installed in the first housing 211, and the second housing 212 is used for capping the planetary gear train 22 in the first housing 211; the first housing 211 has an opening which is a first opening 2111, and the first opening 2111 is provided with a plurality of.

[0056] That is, when the driven dog disc and the differential driving dog disc 225 of the differential 2 are in a separated state of mutual separation. The main driven gear 25 and the housing 21 are lost in the transmission relationship between the planetary gear system 22, by providing a plurality of first openings 2111 on the first housing 211, the first opening 2111 can be relatively easy to be opposite to the outlet of the oil guide channel, so that the lubricating oil in the oil guide channel can be relatively directly into the housing 21, optionally, a plurality of first openings 2111 are arranged around the rotation axis of the housing 21.

[0057] In some embodiments of the utility model, as shown in Figure 1 、 Figure 3 and Figure 9 The protective shell 1 is provided with an oil injection pipe 13, and the oil injection pipe 13 has an oil guide channel, which is a first oil guide channel. That is, the pipeline structure, such as the oil injection pipe 13 in the example, can be installed in the protective shell 1, the oil injection pipe 13 can be close to the opening of the housing 21, which can reduce the difficulty of lubricating oil entering the housing 21 through the opening, at the same time, the oil injection pipe 13 can make good use of the space between the protective shell 1 and the housing 21, and also reduce the difficulty of setting the oil guide channel in the protective shell 1, which can reduce the production cost. Exemplarily, the oil injection pipe 13 is installed in the first protective shell 11.

[0058] In some embodiments of the utility model, as shown in Figure 1 、 Figure 2 and Figure 9 The oil outlet end of the oil injection pipe 13 has a plurality of oil outlet holes 131, and the oil outlet directions of at least two oil outlet holes 131 of the plurality of oil outlet holes 131 are different. That is, by making the oil outlet directions of at least two oil outlet holes 131 of the plurality of oil outlet holes 131 different, oil of different angles can be sprayed from the oil injection pipe 13, so that the first opening 2111 is not easy to be dislocated with the oil outlet hole 131, and even if the first opening 2111 is dislocated with the oil outlet hole 131, the lubricating oil can be transported into the housing 21 as much as possible.

[0059] Exemplarily, the oil outlet hole 131 is provided with three, and the oil outlet directions of the three oil outlet holes 131 are different. It should be noted that the example is only illustrative, and the number and direction of the oil outlet hole 131 of the application are not limited.

[0060] In some embodiments of the utility model, as shown in Figure 1 、 Figure 2 and Figure 9 The oil injection pipe 13 extends along the rotation axis direction of the housing 21, and is located on one side of the first housing 211 in the radial direction, and the oil outlet hole 131 is located on the side of the oil injection pipe 13 facing the first housing 211.

[0061] In some embodiments of the utility model, as shown in Figure 1 、 Figure 4 It is shown that the second shell 212 has an opening as a second opening 2121, and the second opening 2121 is provided with a plurality of second openings 2121, which are arranged at intervals around the rotation axis of the shell 21. The oil guide channel in the protective shell 1 is a second oil guide channel 14, and the outlet of the second oil guide channel 14 faces the second opening 2121.

[0062] That is, the lubricating oil can enter the shell 21 from the first opening 2111 of the first shell 211, and the second oil guide channel 14 is arranged in the protective shell 1, so that the lubricating oil can also enter the shell 21 from the second opening 2121 of the second shell 212, thereby better lubricating and cooling the planetary gear train 22 in the shell 21.

[0063] In some embodiments of the utility model, as shown in Figure 1 、 Figures 4-7 It is shown that the outlet of the second oil guide channel 14 is located on the side of the second shell 212 away from the first shell 211, and the side of the second shell 212 away from the first shell 211 is provided with a convex ring 2122 around the rotation axis. The side of the convex ring 2122 away from the rotation axis is provided with a first oil guide groove 31 around the rotation axis, and the first oil guide groove 31 is in communication with the second opening 2121.

[0064] That is, since the shell 21 can rotate, when the shell 21 stops rotating, the second opening 2121 of the second shell 212 may not be opposite to the outlet of the second oil guide channel 14. Based on this, by arranging the first oil guide groove 31 on the side of the second shell 212 away from the first shell 211, the lubricating oil flowing out of the outlet of the second oil guide channel 14 can enter the first oil guide groove 31, and then flow along the oil guide groove towards the second opening 2121, and then enter the shell 21 from the second opening 2121, thereby completing the lubrication of the planetary gear train 22.

[0065] In addition, even when the shell 21 stops rotating, one of the second openings 2121 of the second shell 212 is opposite to the outlet of the second oil guide channel 14, a part of the lubricating oil can directly enter the shell 21 from the second opening 2121, and another part of the lubricating oil can enter the first oil guide groove 31, and then enter the shell 21 from other second openings 2121 which are not opposite to the outlet of the second oil guide channel 14 along the first oil guide groove 31.

[0066] In some embodiments of the utility model, as shown in Figure 1 、 Figures 4-7As shown, the inner wall of the at least one second opening 2121 is provided with a second oil guide groove 32, the second oil guide groove 32 is connected with the first oil guide groove 31, and the second oil guide groove 32 is used for guiding the oil in the first oil guide groove 31 into the housing 21. The second oil guide groove can guide the flow direction of the lubricating oil entering the second opening 2121, so that the lubricating oil can better enter the housing 21.

[0067] In some embodiments of the utility model, as shown in Figure 1 , Figures 4-7 As shown, the second oil guide groove 32 extends along the axial direction of the housing 21 and is located at the position adjacent to the rotation axis of the second opening 2121. That is, the lubricating oil entering the second opening 2121 can be better collected into the second oil guide groove 32, thereby better entering the housing 21 along the second oil guide groove 32, which is conducive to improving the lubrication and cooling effect on the planetary gear train 22.

[0068] In some embodiments of the utility model, as shown in Figure 1 , Figures 4-7 As shown, the side surface of the second housing 212 facing the first housing 211 is provided with a third oil guide groove 33, and the third oil guide groove 33 is in communication with the second oil guide groove 32. That is, when the lubricating oil flows along the second oil guide groove 32 towards the housing 21, the lubricating oil can enter the third oil guide groove 33 from the second oil guide groove 32, so that the lubricating oil can be better diffused in the housing 21 along the third oil guide groove 33, and the flow direction of the lubricating oil entering the housing 21 can be better constrained, which is conducive to improving the lubrication and cooling effect on the planetary gear train 22.

[0069] Optionally, as shown in Figure 1 , Figures 4-7 As shown, the third oil guide groove 33 extends to the shaft hole 34 of the second housing 212 in the radial direction. In this way, through the third oil guide groove 33 extending in the radial direction, the lubricating oil can be diffused in the radial direction to realize the lubrication of the planetary gear train 22, and the third oil guide groove 33 extending in the radial direction can also better guide the lubricating oil to the shaft hole 34 to better realize the lubrication and cooling between the output shaft and the half shaft gear.

[0070] In some embodiments of the utility model, as shown in Figure 1 , Figure 9 As shown, at least one of the first oil guide groove 31, the second oil guide groove 32 and the third oil guide groove 33, the direction from the groove bottom to the groove opening, at least one of the opposite two side walls is inclined towards the direction away from each other. That is, in the direction from the groove bottom to the groove opening, the opening of the groove gradually increases, which can be conducive to the collection of the lubricating oil, so that the lubricating oil can be better guided to effectively lubricate and cool the planetary gear train 22.

[0071] For example, the first oil guiding groove 31, the second oil guiding groove 32, and the third oil guiding groove 33 are all oriented from the bottom of the groove to the opening of the groove, and at least one of the two opposite sidewalls is inclined in a direction away from each other. It should be noted that this example is only illustrative and is not intended to be limiting.

[0072] In some embodiments of this utility model, such as Figure 1 , Figure 9 As shown, the second oil guide channel 14 includes a first section 141, a second section 142, and a third section 143. The first section 141 and the third section 143 are radially spaced apart. The second section 142 connects the first section 141 and the third section 143. The end of the first section 141 away from the second section 142 has an outlet facing the second opening 2121. The end of the third section 143 away from the second section 142 has a first oil inlet. The differential assembly 100 also includes a main reduction driven gear 25 sleeved on the housing 21. The first oil inlet is located radially outside the main reduction driven gear 25.

[0073] In other words, when the main reducer driven gear 25 rotates, the main reducer driven gear 25 can agitate the lubricating oil to the first oil inlet, and then enter the oil guide channel from the first oil inlet. That is, the lubricating oil can be transported along the third section 143, the second section 142, and the first section 141, and then from the opening of the first section 141 toward the second housing 212, thereby better recycling the lubricating oil in the housing 21.

[0074] In some embodiments of this utility model, such as Figure 1 , ​ As shown, the second oil guide channel 14 also includes a fourth section 144, which is connected to the second section 142. The end of the fourth section 144 away from the second section 142 has a second oil inlet that communicates with the external space. The first section 141 and the third section 143 are parallel and both extend axially. The second section 142 and the fourth section 144 are collinear and both extend radially.

[0075] In other words, lubricating oil can be introduced from the outside of the protective shell 1 through the second oil inlet of the fourth section 144 into the second oil guide channel 14. Specifically, the lubricating oil introduced from the second oil inlet of the fourth section 144 can be delivered to the second housing 212 in sequence through the second section 142 and the first section 141, thereby better lubricating and cooling the planetary gear train 22 inside the housing 21.

[0076] In some embodiments of this utility model, such as ​As shown, the flow passage cross section of the first section 141 is smaller than that of the second section 142. That is, when the lubricating oil enters the first section 141 from the second section 142, the oil pressure of the lubricating oil increases, thereby better increasing the distance of the lubricating oil from the opening of the first section 141, and better spraying the lubricating oil onto the side wall of the second housing 212, or directly entering the housing 21 from the second opening 2121 of the second housing 212, with high reliability and good practicability.

[0077] The utility model discloses still propose a kind of vehicle with the differential assembly 100 of above-mentioned embodiment.

[0078] According to the vehicle of the utility model embodiment, by being provided with the differential assembly 100 of above-mentioned embodiment, the differential assembly 100 can better control the wheel of two sides of vehicle to rotate at same speed or different speed, with high reliability and good stability.

[0079] The differential assembly 100 and other constitutions and operation of the vehicle according to the utility model embodiment are known to those skilled in the art, and will not be described in detail here.

[0080] In the description of the present specification, the description of the terms "some embodiments", "optionally", "further" or "some examples" and the like means that the specific features, structures, materials or characteristics described in conjunction with the embodiments or examples are included in at least one embodiment or example of the utility model. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0081] Although the embodiments of the utility model have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and purposes of the utility model, and the scope of the utility model is defined by the claims and their equivalents.

Claims

1. A differential assembly (100) characterized by, Comprising: A protective shell (1); A differential (2) mounted in the protective shell (1), the differential (2) comprising: a housing (21) and a planetary gear train (22) mounted in the housing (21), the housing (21) is rotatably mounted in the protective shell (1), and the housing (21) is provided with an opening, wherein the protective shell (1) is provided with an oil guide channel, and the outlet of the oil guide channel is directed towards the opening of the housing (21).

2. The differential assembly (100) of claim 1, wherein, The housing (21) comprises a first housing (211) and a second housing (212) connected detachably, the planetary gear train (22) is mounted in the first housing (211), and the second housing (212) is used to cover the planetary gear train (22) in the first housing (211); The first housing (211) has the opening as a first opening (2111), and the first opening (2111) is provided with a plurality of first openings (2111) arranged at intervals around the rotation axis of the housing (21).

3. The differential assembly (100) of claim 2, wherein, An oil injection pipe (13) is mounted in the protective shell (1), and the oil injection pipe (13) has the oil guide channel as a first oil guide channel.

4. The differential assembly (100) of claim 3, wherein, The oil outlet end of the oil injection pipe (13) has a plurality of oil outlet holes (131), and at least two of the plurality of oil outlet holes (131) have different oil outlet directions.

5. The differential assembly (100) of claim 4, wherein, The oil injection pipe (13) extends along the rotation axis direction of the housing (21) and is located on one side of the first housing (211) in the radial direction, and the oil outlet holes (131) are all located on the side of the oil injection pipe (13) facing the first housing (211).

6. The differential assembly (100) according to claim 2, characterized in that: The second housing (212) has the opening as a second opening (2121), and the second opening (2121) is provided with a plurality of second openings (2121) arranged at intervals around the rotation axis of the housing (21), and the protective shell (1) has the oil guide channel as a second oil guide channel (14), and the outlet of the second oil guide channel (14) is directed towards the second opening (2121).

7. The differential assembly (100) of claim 6, wherein, The outlet of the second oil guide channel (14) is located on the side of the second housing (212) away from the first housing (211), The side of the second housing (212) away from the first housing (211) is provided with a convex ring (2122) surrounding the rotation axis, the side of the convex ring (2122) away from the rotation axis is provided with a first oil guide groove (31) surrounding the rotation axis, and the first oil guide groove (31) communicates with the second opening (2121).

8. The differential assembly (100) of claim 7, wherein, The inner wall of at least one of the second openings (2121) is provided with a second oil guide groove (32), the second oil guide groove (32) is connected with the first oil guide groove (31), and the second oil guide groove (32) is used to guide the oil in the first oil guide groove (31) into the housing (21).

9. The differential assembly (100) of claim 8, wherein, The second oil guide groove (32) extends along the axial direction of the housing (21) and is located adjacent to the rotation axis of the second opening (2121).

10. The differential assembly (100) of claim 8, wherein, The second housing (212) has a third oil guide groove (33) on the side facing the first housing (211), and the third oil guide groove (33) is in communication with the second oil guide groove (32).

11. The differential assembly (100) of claim 10, wherein, The third oil guide groove (33) extends along the radial direction to the shaft hole (34) of the second housing (212).

12. The differential assembly (100) according to claim 10, characterized in that, At least one of the first oil guide groove (31), the second oil guide groove (32) and the third oil guide groove (33) has a direction from the groove bottom to the groove opening, and at least one of the two opposite side walls is inclined towards the direction away from each other.

13. The differential assembly (100) of claim 6, characterized in that, The second oil guide channel (14) comprises a first section (141), a second section (142) and a third section (143), the first section (141) and the third section (143) are spaced apart along the radial direction, and the second section (142) is in communication between the first section (141) and the third section (143), The first section (141) has an outlet towards the second opening (2121) at the end away from the second section (142), The third section (143) has a first oil inlet at the end away from the second section (142), wherein the differential assembly (100) further comprises a main reduction driven gear (25) sleeved on the housing (21), and the first oil inlet is located radially outside the main reduction driven gear (25).

14. The differential assembly (100) of claim 13, wherein, The second oil guide channel (14) further comprises a fourth section (144), the fourth section (144) is connected with the second section (142), and the fourth section (144) has a second oil inlet in communication with the external space at the end away from the second section (142), wherein, The first section (141) and the third section (143) are parallel and both extend along the axial direction, and the second section (142) and the fourth section (144) are collinear and both extend along the radial direction.

15. The differential assembly (100) of claim 13, wherein, The flow cross section of the first section (141) is smaller than the flow cross section of the second section (142).

16. A vehicle characterized by comprising: The differential assembly (100) according to any one of claims 1-15.

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