Differential mechanism, speed change device, power assembly and vehicle

Abstract

The utility model discloses a differential mechanism, a speed change device, a power assembly and a vehicle, relates to the technical field of vehicles, and aims to solve the problem that the service life of the differential mechanism is shortened. A containing space is formed in the rotary shell, the rotary shell comprises a side wall part, the side wall part is provided with a first mounting hole and a first positioning hole which are communicated, and the first positioning hole is communicated with the external space of the rotary shell. Part of the first fixing shaft is contained in the first mounting hole, and a second positioning hole is formed in the first fixing shaft. And the first positioning pin is accommodated in the first positioning hole and the second positioning hole. And a first flow channel communicated with the first positioning hole is formed in the first positioning pin. And a first oil outlet is formed in the side wall of the first positioning pin. A part of the side wall part between the first positioning hole and the containing space is a first side wall part, and a second oil outlet is formed between the first side wall part and the side wall face of the first fixing shaft. And the second oil outlet is communicated with the first oil outlet. The first planetary gear is accommodated in the accommodating space and is rotatably connected to the first fixing shaft. The utility model is used for vehicle transmission.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicles, and in particular to a differential, a speed change device, a power assembly and a vehicle. Background Art

[0002] The vehicle includes a differential, which is arranged between two axles on opposite sides of the vehicle. A planetary gear is arranged inside the differential, and the planetary gear and the housing of the differential are in contact. The planetary gears are respectively meshed with the gears on the two axles on opposite sides of the vehicle. Through the arrangement of the planetary gears, when the vehicle turns or passes through a rough road, the wheels on both sides of the vehicle can rotate at different speeds, so that the vehicle can drive on a curve.

[0003] In the related art, the differential is arranged in the gearbox, and the gearbox contains lubricating oil. Usually, a hole is opened on one side of the differential housing in the width direction of the vehicle, so that the lubricating oil in the gearbox enters the differential through the hole on the differential housing, thereby lubricating the gears and the like in the differential.

[0004] With the above-mentioned differential setting method, after the lubricating oil enters the differential, most of it will be attached to the gears on the two opposite axles on both sides of the vehicle, and only a small part will be attached to the planetary gears. However, when the vehicle slips, the planetary gears will continue to rub against the housing during the continuous rotation, causing the temperature at this position to rise, which will affect the internal components of the differential and shorten the service life of the differential. Utility Model Content

[0005] The utility model aims to provide a differential, a speed change device, a power assembly and a vehicle, aiming to solve the problem of shortened service life of the differential.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] According to a first aspect provided by the present application, a differential is provided, including a rotating housing, a first fixed shaft, a first locating pin, a first planetary gear, a first driven gear and a second driven gear.

[0008] The rotating shell has a containing space, and the rotating shell includes a side wall portion, and the side wall portion is provided with a first mounting hole. The side wall portion is also provided with a first positioning hole, the first positioning hole is connected to the first mounting hole, and at least one end of the first positioning hole is connected to the external space of the rotating shell.

[0009] The first fixed shaft is partially accommodated in the first mounting hole. The first fixed shaft is partially provided with a second positioning hole, the second positioning hole is opposite to and connected with the first positioning hole. A first gap is provided between the first fixed shaft and the hole wall of the first mounting hole.

[0010] The first positioning pin is accommodated in the first positioning hole and the second positioning hole. A first flow channel is provided in the first positioning pin, and one end opening of the first flow channel is opposite to and communicates with one end opening of the first positioning hole communicating with the external space of the rotating housing. A first oil outlet is provided on the side wall of the first positioning pin at a position opposite to the first gap, and the first oil outlet is communicated with the first flow channel.

[0011] A portion of the side wall between the first positioning hole and the accommodating space is the first side wall, and a second oil outlet is provided between the first side wall and the side wall surface of the first fixed shaft. The second oil outlet is communicated with the first oil outlet.

[0012] The first planetary gear is accommodated in the accommodation space and is rotatably connected to the first fixed shaft.

[0013] The first driven gear is accommodated in the accommodation space. The first driven gear is rotatably connected to the rotating shell, and the first driven gear is coaxially arranged with respect to the rotating axis of the rotating shell.

[0014] The second driven gear is accommodated in the accommodation space. The second driven gear is rotatably connected to the rotating housing, and the second driven gear is coaxially arranged with respect to the rotating axis of the rotating housing. The first planetary gear is meshed with both the second driven gear and the first driven gear.

[0015] The differential provided in the embodiment of the present application can realize the vehicle's straight-line driving and curved driving through the cooperation between the first planetary gear, the first driven gear and the second driven gear. Since the first locating pin is accommodated in the first locating hole and the second locating hole, the first fixed shaft can be fixed to the rotating housing through the locating pin. And since the first flow channel is connected to the first locating hole, and the first oil outlet is connected to the first flow channel, the lubricating oil can flow into the first flow channel through the first locating hole, and then flow to the first oil outlet.

[0016] Since the first oil outlet and the second oil outlet are connected, the lubricating oil in the first flow channel can flow to the second oil outlet through the first oil outlet, and then flow into the gap between the first planetary gear and the side wall portion. During the rotation of the first planetary gear, the lubricating oil will adhere to the entire area of ​​the side surface of the first planetary gear facing the side wall portion along with the first planetary gear, thereby lubricating the first planetary gear and the side wall portion.

[0017] In this way, when the vehicle slips, the lubricating oil can continue to lubricate the first planetary gear to prevent the first planetary gear from overheating due to friction with the side wall, thereby protecting the differential and extending the service life of the differential.

[0018] In some embodiments, the first flow channel extends along the length direction of the first positioning pin and passes through the first positioning pin.

[0019] Compared with the differential provided in the embodiment of the present application, in which the first flow channel is formed by a blind hole opened on the locating pin, when the first flow channel passes through the first locating pin, the processing difficulty of the first flow channel can be reduced, thereby facilitating the processing of the first flow channel and the processing and manufacturing of the first locating pin.

[0020] In some embodiments, the first positioning pin is provided with an elastic notch, which is located on the side of the first flow channel facing the accommodating space. The elastic notch extends along the length direction of the first positioning pin and passes through the first positioning pin. The part of the elastic notch opposite to the first gap forms a first oil outlet.

[0021] The differential provided in the embodiment of the present application has an elastic notch that penetrates the first locating pin along the length direction of the first locating pin. Therefore, during the installation of the first locating pin, there is no need to move the locating pin. It is only necessary to make the elastic notch face the first planetary gear, and then place the first locating pin in the first locating hole and the second locating hole. This can simplify the installation process of the first locating pin and facilitate the installation of the first locating pin.

[0022] Furthermore, since an elastic notch is provided on the locating pin, the first locating pin can be compressed during the installation of the first locating pin to reduce the size of the elastic notch and thereby reduce the radial dimension of the first locating pin. After the compressed first locating pin is installed in the first locating hole and the second locating hole, the elastic force of the first locating pin during recovery is utilized to make the outer wall surface of the first locating pin and the inner wall surface of the first locating hole or the second locating hole tightly abut against each other, thereby achieving fixation among the first locating pin, the rotating housing and the first fixed shaft. This can also simplify the installation process of the first locating pin and facilitate the installation of the first locating pin.

[0023] In some embodiments, the side wall surface of the first fixed shaft includes a first concave area, and the first concave area is located on a side of the first mounting hole facing the accommodating space. A second oil outlet is formed between the first concave area and the inner wall surface of the first mounting hole.

[0024] In the differential provided by the embodiment of the present application, the lubricating oil at the first oil outlet can continuously gather between the first concave area and the first side wall portion until the entire second oil outlet is filled, and then contact the first planetary gear to lubricate the first planetary gear. In this way, compared with the lubricating oil at the first oil outlet flowing into the accommodating space through the first gap, the provision of the second oil outlet can reduce the resistance encountered by the lubricating oil at the first oil outlet when flowing into the accommodating space, thereby ensuring that the lubricating oil can normally contact the first planetary gear to ensure the lubricating oil's lubricating effect on the first planetary gear.

[0025] In some embodiments, the differential further includes a washer, which is sleeved on the first fixed shaft and abuts between the first planetary gear and the side wall portion.

[0026] In the differential provided in the embodiment of the present application, the first planetary gear will rub against the gasket during rotation. Compared with the friction between the first planetary gear and the side wall, the gasket can reduce the resistance encountered by the first planetary gear during rotation, so that the first planetary gear can rotate more smoothly, thereby improving the differential effect of the differential.

[0027] In some embodiments, the side wall portion is provided with a second mounting hole. The side wall portion is also provided with a third positioning hole, the third positioning hole is communicated with the second mounting hole, and at least one end of the third positioning hole is communicated with the external space of the rotating housing. Another part of the first fixed shaft is accommodated in the second mounting hole. Another part of the first fixed shaft is provided with a fourth positioning hole, the fourth positioning hole is opposite to and communicated with the third positioning hole. A second gap is provided between the first fixed shaft and the hole wall of the second mounting hole.

[0028] The differential also includes a second locating pin and a second planetary gear. The second locating pin is accommodated in the third locating hole and the fourth locating hole. A second flow channel is provided in the second locating pin. A third oil outlet is provided on the side wall of the second locating pin at a position opposite to the second gap, and the third oil outlet is connected to the second flow channel.

[0029] A portion of the side wall between the third positioning hole and the accommodating space is the second side wall, and a fourth oil outlet is provided between the third side wall and the side wall surface of the first fixed shaft. The fourth oil outlet is communicated with the third oil outlet.

[0030] The second planetary gear is accommodated in the accommodation space and is rotatably connected to the first fixed shaft. The second planetary gear is meshed with both the first driven gear and the second driven gear.

[0031] The differential provided in the embodiment of the present application can drive the first planetary gear and the second planetary gear to rotate through the first fixed shaft when the rotating housing rotates, so that the first planetary gear and the second planetary gear drive the first driven gear and the second driven gear to rotate, thereby improving the stability of the differential during rotation.

[0032] Furthermore, through the provision of the second locating pin and the second concave area, the lubricating oil can also lubricate the second planetary gear to extend the service life of the differential.

[0033] In some embodiments, the rotating housing further comprises a top wall portion and a bottom wall portion. The top wall portion and the bottom wall portion are connected to both sides of the side wall portion in the rotating axis direction of the rotating housing. The first driven gear is rotatably connected to the top wall portion. The second driven gear is rotatably connected to the bottom wall portion.

[0034] The differential provided by the embodiment of the present application can process the top wall and the bottom wall separately during the process of processing the rotating housing, and before assembling the top wall and the bottom wall together, the first driven gear can be rotatably connected to the top wall, and the second driven gear can be rotatably connected to the bottom wall, and then the top wall and the bottom wall are assembled together. In this way, when assembling the first driven gear, it will not be blocked by the bottom wall, and when assembling the second driven gear, it will be blocked by the top wall, which can facilitate the installation of the first driven gear and the second driven gear. At the same time, when installing the first planetary gear and the first fixed shaft on the side wall, they will not be blocked by the top wall and the bottom wall, which can facilitate the installation of the first planetary gear and the first fixed shaft.

[0035] In some embodiments, the side wall portion and the top wall portion are integrally formed, and the side wall portion and the bottom wall portion are assembled and connected.

[0036] In the differential provided by the embodiment of the present application, during the process of assembling the differential, after the first driven gear is rotatably connected to the top wall, the second driven gear is rotatably connected to the bottom wall, and the first planetary gear and the first fixed shaft are installed on the side wall, it is only necessary to connect the side wall and the bottom wall together to complete the assembly of the differential. In this way, compared with the split structure between the top wall, the side wall and the bottom wall, the integral molding of the side wall and the top wall can simplify the assembly process of the differential, thereby facilitating the assembly of the differential.

[0037] In some embodiments, one end of the first positioning hole passes through the end surface of the top wall portion facing away from the bottom wall portion, and the other end of the first positioning hole passes through the end surface of the side wall portion facing the bottom wall portion.

[0038] Compared with a blind hole in the differential provided in the embodiment of the present application, when the first positioning hole passes through the side wall and the top wall, the processing difficulty of the first positioning hole can be reduced, thereby facilitating the processing of the first flow channel and the processing and manufacturing of the top wall and the side wall.

[0039] In some embodiments, an annular rib is provided on the end surface of the top wall portion facing away from the bottom wall portion, and an opening of one end of the first positioning hole penetrating through the end surface of the top wall portion facing away from the bottom wall portion is located in the area formed by the annular rib.

[0040] In the differential provided by the embodiment of the present application, during the rotation of the rotating housing, the lubricating oil splashed into the area formed by the annular rib will gather on the inner wall surface of the annular rib under the action of centrifugal force, and then continue to flow into the first positioning hole and the first flow channel under the obstruction of the annular rib until the first flow channel is filled. In this way, through the provision of the annular rib, the lubricating oil can fill the first flow channel, and then enter the accommodating space through the first oil outlet and the second oil outlet to lubricate the first planetary gear and extend the service life of the differential.

[0041] In some embodiments, the annular rib is disposed around the axis of the first driven gear.

[0042] In the differential provided by the embodiment of the present application, the annular ribs can block the lubricating oil around the axis of the first driven gear, so that more lubricating oil is gathered on the inner wall surface of the annular ribs, and then enters the first flow channel through the first positioning hole. In this way, during the rotation of the rotating shell, the annular ribs can continue to gather the lubricating oil to ensure that a sufficient amount of lubricating oil enters the first flow channel through the first positioning hole, and then enters the accommodating space through the first oil outlet and the second oil outlet, thereby ensuring the lubrication effect of the first planetary gear.

[0043] In some embodiments, the annular rib includes a first ring portion and a second ring portion, wherein the second ring portion is connected between the first ring portion and the top wall portion. Along the direction from the top wall portion to the bottom wall portion, the radial dimension of the inner wall surface of the first ring portion gradually increases.

[0044] In the differential provided in the embodiment of the present application, when the lubricating oil gathers on the inner wall surface of the annular rib, under the action of centrifugal force, the lubricating oil will flow along the inner wall surface of the first ring portion in a direction close to the top wall portion, and gather between the inner wall surface of the first ring portion and the inner wall surface of the second ring portion, thereby preventing the lubricating oil from flowing along the inner wall surface of the first ring portion in a direction away from the top wall portion, thereby achieving the gathering effect of the annular rib on the lubricating oil.

[0045] In some embodiments, the differential further includes a first mating piece, a second mating piece, and a drive assembly. The first mating piece is disposed on a side of the second driven gear that is opposite to the first driven gear. The second mating piece and the first mating piece are arranged axially along the rotating housing. The drive assembly is connected to the second mating piece and is used to drive the second mating piece to move toward the first mating piece so that the first mating piece and the second mating piece cooperate to prevent the second driven gear from rotating relative to the rotating housing.

[0046] The differential provided in the embodiment of the present application can drive the second mating member to cooperate with the first mating member through the driving assembly when one side of the vehicle's wheel slips, so that the second driven gear and the rotating outer shell are relatively fixed. During the rotation of the rotating outer shell, there is no speed difference between the second driven gear and the rotating outer shell, which will limit the first planetary gear to only revolve with the rotating outer shell and cannot rotate around its own rotation axis.

[0047] In this way, since the first planetary gear can only revolve with the rotating housing, the first planetary gear can drive the first driven gear and the second driven gear to rotate at the same speed. In this way, no matter which side of the vehicle's road wheel slips, the road wheels on both sides of the vehicle can rotate at the same speed, so that the vehicle can continue to move and get out of trouble.

[0048] In some embodiments, the driving assembly includes an electromagnet, a permanent magnet, and a connecting rod. The electromagnet is disposed on a side of the bottom wall portion facing away from the top wall portion. The permanent magnet is disposed on a side of the bottom wall portion facing away from the top wall portion. One end of the connecting rod is connected to the permanent magnet. A connecting hole is provided on the bottom wall portion, the connecting rod passes through the connecting hole, and the other end of the connecting rod opposite to the second matching member is connected.

[0049] The differential provided in the embodiment of the present application can push the permanent magnet to move toward the second driven gear after the electromagnet is energized. Since the permanent magnet is connected to the connecting rod, the connecting rod is connected to the second matching piece, and the connecting rod passes through the connecting hole, under the action of the electromagnet, the permanent magnet, the connecting rod and the second matching piece can be synchronously moved along the axial direction of the connecting hole toward the second driven gear, thereby realizing the cooperation between the second matching piece and the second matching piece, and realizing the driving function of the drive assembly.

[0050] In some embodiments, the differential further includes an elastic member elastically supported between the first mating member and the second mating member.

[0051] In the differential provided by the embodiment of the present application, when the electromagnet is powered on, the second matching piece will move in the direction close to the first matching piece and match with the first matching piece, at which time the first matching piece and the second matching piece will compress the elastic piece. When the electromagnet is powered off, the elastic piece can release the elastic potential energy generated when it is compressed, and push the second matching piece to move in the direction away from the first matching piece, so that the second matching piece and the first matching piece are separated, and the second matching piece is reset. In this way, the second matching piece can be automatically reset by setting the elastic piece, which can simplify the structure of the differential and facilitate the setting of the differential.

[0052] According to a second aspect provided by the present application, a speed change device is provided, comprising the above-mentioned differential, a gearbox and a shift assembly. The differential is arranged in the gearbox. The shift assembly is arranged in the gearbox. The shift assembly comprises a transmission shaft, the transmission shaft is connected to the differential, and the shift assembly is used to adjust the transmission ratio between the transmission shaft and the differential.

[0053] According to a third aspect provided by the present application, a power assembly is provided, comprising the above-mentioned speed change device, an engine, a first output shaft and a second output shaft. The engine is connected to the transmission shaft for driving the transmission shaft to rotate. The first output shaft is connected to the first driven gear. The second output shaft is connected to the second driven gear.

[0054] According to a fourth aspect provided by the present application, a vehicle is provided, comprising the above-mentioned power assembly, a vehicle body, a first load-bearing road wheel and a second load-bearing road wheel. The power assembly is arranged on the vehicle body. The first load-bearing road wheel is connected to the first output shaft of the power assembly. The second load-bearing road wheel is connected to the second output shaft of the power assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0056] Figure 1 A schematic diagram of the external structure of a differential provided in an embodiment of the present application;

[0057] Figure 2 for Figure 1 A schematic diagram of the cross-sectional structure of the differential along the AA direction;

[0058] Figure 3 for Figure 2 A schematic cross-sectional view of the rotating housing 1;

[0059] Figure 4 for Figure 1 An exploded schematic diagram of the differential 10 in FIG.

[0060] Figure 5 for Figure 4 A schematic diagram of the external structure of the first fixed shaft 2;

[0061] Figure 6 for Figure 2 A local enlarged schematic diagram of the middle A;

[0062] Figure 7 for Figure 2 A schematic cross-sectional structure diagram of the first positioning pin 6 and the first fixed shaft 2;

[0063] Figure 8 for Figure 4 A schematic diagram of the external structure of the first positioning pin 6;

[0064] Fig. 9 for Figure 8 A schematic structural diagram of the first positioning pin 6 when viewed from the direction X;

[0065] Fig.10 for Figure 3 A partial enlarged schematic diagram of point B in the middle;

[0066] Fig.11 for Figure 4 A schematic structural diagram of the first matching member and the second matching member in a separated state;

[0067] Fig.12 for Fig.11 A schematic structural diagram of the first matching piece and the second matching piece in the matching state.

[0068] Figure numerals: 10, differential; 1, rotating housing; 11, accommodating space; 12, side wall; 121, first mounting hole; 122, first positioning hole; 1221, oil guide port; 123, first side wall; 124, second mounting hole; 125, third positioning hole; 126, second side wall; 127, oil inlet; 13, top wall; 131, annular rib; 1311, first ring; 1312, second ring; 14, bottom wall; 141, connecting hole; 2, first fixed shaft; 21, second oil outlet; 22, second positioning hole; 23, fourth positioning hole; 24, first concave area domain; 25, second concave area; 3, first planetary gear; 4, first driven gear; 5, second driven gear; 6, first locating pin; 61, first flow channel; 62, first oil outlet; 63, elastic notch; 7, second locating pin; 8, second planetary gear; 9, gasket; 101, first matching piece; 1011, first clamping protrusion; 102, second matching piece; 1021, second clamping protrusion; 1022, connecting plate; 103, driving assembly; 1031, electromagnet; 1032, permanent magnet; 1033, connecting rod; 104, protective shell; 105, elastic piece; M, first gap. DETAILED DESCRIPTION

[0069] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0070] In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", "front", "back", "inside", "outside" and the like indicate directions or positional relationships based on the directions or relative positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention. Unless otherwise specified, the above-mentioned directional description can be flexibly set in the process of actual application under the condition that the relative positional relationship shown in the accompanying drawings is satisfied.

[0071] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "plurality" means two or more.

[0072] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection. It can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0073] In the embodiments of the present invention, the terms "include", "comprises" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, article or device. In the absence of more restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, article or device including the element.

[0074] In the embodiments of the present invention, words such as "exemplary" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present invention should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way.

[0075] In the description of this specification, specific features, structures, materials or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.

[0076] The vehicle includes a differential, which is arranged between two axles on opposite sides of the vehicle. A planetary gear is arranged inside the differential, and a gasket is abutted between the planetary gear and the housing of the differential. The planetary gears are respectively meshed with the gears on the two axles on opposite sides of the vehicle. Through the arrangement of the planetary gears, when the vehicle turns or passes through a rough road, the wheels on both sides of the vehicle can rotate at different speeds, so that the vehicle can drive on a curve.

[0077] In the related art, the differential is arranged in the gearbox, and the gearbox contains lubricating oil. Usually, a hole is opened on one side of the differential housing in the width direction of the vehicle, so that the lubricating oil in the gearbox enters the differential through the hole on the differential housing, thereby lubricating the gears and the like in the differential.

[0078] With the above-mentioned differential setting method, after the lubricating oil enters the differential, most of it will be attached to the gears on the two opposite axles on both sides of the vehicle, and only a small part will be attached to the planetary gears. However, when the vehicle slips, the planetary gears will continue to rotate and rub against the gaskets, causing the temperature at that position to rise, and the gaskets will be burned and melted, which will affect the service life of the differential.

[0079] Based on this, the present application provides a vehicle, which includes a vehicle body, a first road wheel and a second road wheel.

[0080] Exemplarily, the first load-bearing wheel may be a round tire or a driving wheel of a crawler track.

[0081] Exemplarily, the second load-bearing wheel may be a round tire or a driving wheel of a crawler track.

[0082] Exemplarily, the second road wheel and the first road wheel may be the same or different.

[0083] The vehicle further includes a powertrain, specifically, the powertrain includes a transmission, an engine, a first output shaft, and a second output shaft.

[0084] Among them, Figure 1 As shown, Figure 1 This is a schematic diagram of the external structure of a differential provided in an embodiment of the present application, wherein the speed change device includes a gearbox, a shift assembly and a differential 10.

[0085] The first output shaft is connected to the differential 10 and is also connected to the first road wheel. The second output shaft is connected to the differential 10 and is also connected to the second road wheel.

[0086] The shift assembly is arranged in the gearbox. The differential 10 is arranged in the gearbox. The transmission shaft of the shift assembly is connected to the engine, and the shift assembly is connected to the differential 10.

[0087] The engine is used to drive the transmission shaft to rotate, and the shift assembly is used to adjust the rotation speed of the differential 10 .

[0088] In this way, when the vehicle is running, the engine can drive the transmission shaft of the shift assembly to rotate, so that the shift assembly drives the differential 10 to rotate, and the differential 10 drives the first output shaft and the first road wheel to rotate, and the differential 10 drives the second output shaft and the second road wheel to rotate, thereby realizing the driving of the vehicle.

[0089] Furthermore, the shift assembly can adjust the gear position of the vehicle during driving by adjusting the transmission ratio between the transmission shaft and the differential 10 .

[0090] Specifically, a plurality of transmission gears are connected to the transmission shaft, a third driven gear is connected to the outside of the differential 10, the transmission shaft can drive the plurality of transmission gears to rotate, and the shift assembly can drive the third driven gear to rotate at different gears through the plurality of transmission gears on the transmission shaft to drive the differential 10 to rotate.

[0091] On this basis, in some embodiments, such as Figure 1 , Figure 2 As shown, Figure 2 for Figure 1 The differential 10 is a cross-sectional structural diagram along the AA direction, and the differential 10 includes a rotating housing 1. The rotating housing 1 is provided with a receiving space 11. Figure 2 , Figure 3 As shown, Figure 3 for Figure 2 The sectional structure diagram of the rotating shell 1 in FIG. 1 is a schematic diagram, wherein the rotating shell 1 comprises a side wall portion 12 , and the side wall portion 12 is provided with a first mounting hole 121 .

[0092] like Figure 2 , Figure 4 As shown, Figure 4 for Figure 1 Schematic diagram of an exploded view of the differential 10 in FIG. 1 , the differential 10 further includes a first fixed shaft 2 , and a portion of the first fixed shaft 2 is accommodated in the first mounting hole 121 .

[0093] The differential 10 further includes a first planetary gear 3 . The first planetary gear 3 is accommodated in the accommodation space 11 and is rotatably connected to the first fixed shaft 2 .

[0094] like Figure 2 , Figure 4 As shown, the differential 10 further includes a first driven gear 4, which is accommodated in the accommodation space 11 and meshes with the first planetary gear 3. The first driven gear 4 is rotatably connected to the rotating housing 1, and the first driven gear 4 is coaxially arranged with respect to the rotating axis of the rotating housing 1.

[0095] like Figure 2 , Figure 4 As shown, the differential 10 further includes a second driven gear 5, which is accommodated in the accommodation space 11. The second driven gear 5 is rotatably connected to the rotating housing 1, and the second driven gear 5 is coaxially arranged with respect to the rotating axis of the rotating housing 1. The first planetary gear 3 is meshed with both the second driven gear 5 and the first driven gear 4.

[0096] Specifically, the first output shaft is connected to the first driven gear 4 of the differential 10 , and the second output shaft is connected to the second driven gear 5 of the differential 10 .

[0097] Through the above arrangement, when the vehicle is traveling in a straight line, the rotating housing 1 of the driving differential 10 can be rotated, so that the rotating housing 1 drives the first fixed shaft 2 to rotate. Since the first planetary gear 3 is meshed with the second driven gear 5 and the first driven gear 4, the force between the first planetary gear 3 and the first driven gear 4, and the force between the first planetary gear 3 and the second driven gear 5 are the same. At this time, the first planetary gear 3, the first driven gear 4 and the second driven gear 5 can remain relatively still, and the rotation speeds of the first driven gear 4 and the second driven gear 5 are the same, so that the rotation speeds of the first output shaft and the first road wheel are the same as the rotation speeds of the second output shaft and the second road wheel, so as to ensure that the vehicle can travel in a straight line.

[0098] When the vehicle turns, the road wheels on both sides of the vehicle need to rotate at different speeds. The road wheels located on the inner side of the vehicle turn will tend to rotate at a lower speed relative to the differential 10, while the road wheels located on the outer side of the vehicle turn will tend to rotate at a higher speed relative to the differential 10. The first planetary gear 3 will rotate under the influence of the trend of the speed change of the road wheels on both sides of the vehicle, so that the speeds of the road wheels on both sides of the vehicle meet their own speed requirements when the vehicle turns, so as to enable the vehicle to travel on a curve.

[0099] like Figure 2 , Figure 3 As shown, the side wall portion 12 is further provided with a first positioning hole 122 , the first positioning hole 122 is communicated with the first mounting hole 121 , and at least one end of the first positioning hole 122 is communicated with the external space of the rotating housing 1 .

[0100] It should be noted that the gearbox contains lubricating oil, which is used to adhere to the multiple transmission gears and the third driven gear on the shift assembly to lubricate the multiple transmission gears and the third driven gear. During the driving of the vehicle, the lubricating oil will continue to splash, and then part of it will flow into the first positioning hole 122.

[0101] like Figure 5 , Figure 6 As shown, Figure 5 for Figure 4 Schematic diagram of the external structure of the first fixed shaft 2, Figure 6 for Figure 2 In the partial enlarged schematic diagram at A, the first fixed shaft 2 is provided with a second positioning hole 22, which is opposite to and connected to the first positioning hole 122. A first gap M is provided between the first fixed shaft 2 and the hole wall of the first mounting hole 121.

[0102] like Figure 6 , Figure 7 As shown, Figure 7 for Figure 2The cross-sectional structural diagram of the first positioning pin 6 and the first fixed shaft 2 is shown in FIG. 1 . The differential 10 further includes a first positioning pin 6 , which is accommodated in the first positioning hole 122 and the second positioning hole 22 .

[0103] like Figure 7 , Figure 8 As shown, Figure 8 for Figure 4 Schematic diagram of the external structure of the first positioning pin 6, a first flow channel 61 is provided in the first positioning pin 6, and one end opening of the first flow channel 61 is opposite to and connected with one end opening of the first positioning hole 122 connected to the external space of the rotating shell 1.

[0104] like Figure 6 , Fig. 9 As shown, Fig. 9 for Figure 8 Schematic diagram of the structure of the first positioning pin 6 when viewed from the direction X, a first oil outlet 62 is provided at a portion of the side wall of the first positioning pin 6 opposite to the first gap M, and the first oil outlet 62 is communicated with the first flow channel 61.

[0105] Through the above arrangement, since the first positioning pin 6 is accommodated in the first positioning hole 122 and the second positioning hole 22, the first fixed shaft 2 can be fixed to the rotating housing 1 through the positioning pin. And since one end opening of the first flow channel 61 is opposite to and connected to one end opening of the first positioning hole 122 connected to the external space of the rotating housing 1, and the first oil outlet 62 is connected to the first flow channel 61, the lubricating oil can flow into the first flow channel 61 through the first positioning hole 122, and then flow to the first oil outlet 62.

[0106] It is understandable that when only a small amount of lubricating oil enters the first flow channel 61 through the first positioning hole 122 , when the rotating housing 1 rotates, the lubricating oil in the first flow channel 61 will be gathered on the inner wall surface of the first flow channel 61 away from the accommodating space 11 under the action of centrifugal force.

[0107] It should be noted that during the driving of the vehicle, the lubricating oil will continuously enter the first flow channel 61 from the first positioning hole 122. After the lubricating oil fills the entire first flow channel 61, the lubricating oil in the gearbox will continue to flow into the first flow channel 61 through the first positioning hole 122. At this time, the lubricating oil in the first flow channel 61 will overflow through the first oil outlet 62.

[0108] like Figure 6 , Figure 7 As shown, the part of the side wall 12 between the first positioning hole 122 and the accommodating space 11 is the first side wall 123 , and a second oil outlet 21 is provided between the first side wall 123 and the side wall surface of the first fixed shaft 2 . The second oil outlet 21 is connected to the first oil outlet 62 .

[0109] Through the above arrangement, the lubricating oil in the first flow channel 61 can flow to the second oil outlet 21 through the first oil outlet 62, and then flow into the gap between the first planetary gear 3 and the side wall portion 12. During the rotation of the first planetary gear 3, the lubricating oil will adhere to the entire area of ​​the side surface of the first planetary gear 3 facing the side wall portion 12 along with the first planetary gear 3, thereby lubricating the first planetary gear 3 and the side wall portion 12.

[0110] In this way, when the vehicle slips, the lubricating oil can continue to lubricate the first planetary gear 3 to prevent the first planetary gear 3 from overheating due to friction with the side wall portion 12, thereby protecting the differential 10 and extending the service life of the differential 10.

[0111] In some examples, such as Figure 1 , Figure 3 As shown, a plurality of oil inlets 127 are also provided on the side wall portion 12, and the plurality of oil inlets 127 are connected to the accommodating space 11, so that the lubricating oil in the gearbox enters the accommodating space 11 through the plurality of oil inlets 127, and is thereby attached to the first driven gear 4 and the second driven gear 5, so as to lubricate the first driven gear 4 and the second driven gear 5.

[0112] In some examples, such as Figure 2 , Figure 3 As shown, the side wall portion 12 is provided with a second mounting hole 124. The side wall portion 12 is also provided with a third positioning hole 125, the third positioning hole 125 is communicated with the second mounting hole 124, and at least one end of the third positioning hole 125 is communicated with the external space of the rotating housing 1.

[0113] like Figure 2 , Figure 4 As shown, another part of the first fixed shaft 2 is accommodated in the second mounting hole 124. Another part of the first fixed shaft 2 is provided with a fourth positioning hole 23, which is opposite to and connected to the third positioning hole 125. A second gap is provided between the first fixed shaft 2 and the hole wall of the second mounting hole 124.

[0114] The differential 10 further includes a second locating pin 7, which is received in the third locating hole 125 and the fourth locating hole 23. A second flow channel is provided in the second locating pin 7. A third oil outlet is provided on the side wall of the second locating pin 7 at a position opposite to the second gap, and the third oil outlet is communicated with the second flow channel.

[0115] Part of the side wall portion 12 between the third positioning hole 125 and the accommodating space 11 is the second side wall portion 126. A fourth oil outlet is provided between the third side wall portion 12 and the side wall surface of the first fixed shaft 2. The fourth oil outlet is communicated with the third oil outlet.

[0116] The differential 10 further includes a second planetary gear 8, which is accommodated in the accommodation space 11 and rotatably connected to the first fixed shaft 2. The second planetary gear 8 is meshed with both the first driven gear 4 and the second driven gear 5.

[0117] Through the above arrangement, when the rotating housing 1 rotates, the first fixed shaft 2 can drive the first planetary gear 3 and the second planetary gear 8 to rotate, so that the first planetary gear 3 and the second planetary gear 8 drive the first driven gear 4 and the second driven gear 5 to rotate, thereby improving the stability of the differential 10 during rotation.

[0118] Furthermore, through the provision of the second locating pin 7 and the second concave area 25 , the lubricating oil can also lubricate the second planetary gear 8 , so as to extend the service life of the differential 10 .

[0119] In some examples, the differential 10 further includes a second fixed shaft, and opposite ends of the second fixed shaft are rotatably connected to the third planetary gear and the fourth planetary gear. The differential 10 further includes a third locating pin and a fourth locating pin.

[0120] The second fixed shaft, the third planetary gear, the fourth planetary gear, the third locating pin and the fourth locating pin are arranged in the same manner as the first fixed shaft 2, the first planetary gear 3, the second planetary gear 8, the first locating pin 6 and the second locating pin 7. The first fixed shaft 2 is connected to the second fixed shaft, and the axial direction of the first fixed shaft 2 intersects with the axial direction of the second fixed shaft.

[0121] Exemplarily, the first flow channel 61 may be formed by a blind hole opened on the positioning pin.

[0122] For example, Figure 8 , Fig. 9 As shown, the first flow channel 61 extends along the length direction of the first positioning pin 6 and passes through the first positioning pin 6 .

[0123] In this way, compared with the first flow channel 61 formed by the blind hole opened on the positioning pin, when the first flow channel 61 passes through the first positioning pin 6, the processing difficulty of the first flow channel 61 can be reduced, thereby facilitating the processing of the first flow channel 61 and facilitating the processing and manufacturing of the first positioning pin 6.

[0124] Exemplarily, the length direction of the first positioning pin 6 may be the same as the axial direction of the rotating shell 1 , or may be arranged to be inclined with respect to the axial direction of the rotating shell 1 .

[0125] On this basis, in some embodiments, such as Figure 6 , Fig. 9As shown, the first positioning pin 6 is provided with an elastic notch 63, which is located on the side of the first flow channel 61 facing the accommodating space 11. The elastic notch 63 extends along the length direction of the first positioning pin 6 and passes through the first positioning pin 6. The part of the elastic notch 63 opposite to the first gap M forms a first oil outlet 62.

[0126] Exemplarily, the first positioning pin 6 and the elastic notch 63 may be formed by bending a plate.

[0127] Exemplarily, the first positioning pin 6 and the elastic notch 63 may be formed by first machining a tubular pin and then opening a side wall of the tubular pin.

[0128] Through the above-mentioned arrangement, since the elastic notch 63 penetrates the first positioning pin 6 along the length direction of the first positioning pin 6, there is no need to move the positioning pin during the installation of the first positioning pin 6. It is only necessary to make the elastic notch 63 face the first planetary gear 3, and then place the first positioning pin 6 in the first positioning hole 122 and the second positioning hole 22. This can simplify the installation process of the first positioning pin 6 and facilitate the installation of the first positioning pin 6.

[0129] Furthermore, since an elastic notch 63 is provided on the locating pin, the first locating pin 6 can be compressed during the installation of the first locating pin 6 to reduce the size of the elastic notch 63 and reduce the radial dimension of the first locating pin 6. After the compressed first locating pin 6 is installed in the first locating hole 122 and the second locating hole 22, the elastic force of the first locating pin 6 during its recovery is utilized to make the outer wall surface of the first locating pin 6 and the inner wall surface of the first locating hole 122 or the second locating hole 22 tightly abut against each other, thereby achieving fixation among the first locating pin 6, the rotating housing 1 and the first fixed shaft 2. This can also simplify the installation process of the first locating pin 6 and facilitate the installation of the first locating pin 6.

[0130] In this way, there is no need to set a fixing structure for fixing the first locating pin 6 , and the fixation between the first locating pin 6 , the rotating housing 1 and the first fixed shaft 2 can be achieved, which can simplify the structure of the differential 10 and facilitate the assembly of the differential 10 .

[0131] Exemplarily, the material of the positioning pin may be spring steel, alloy steel, stainless steel, etc.

[0132] In some embodiments, Figure 5 , Figure 6 As shown, the side wall of the first fixed shaft 2 includes a first concave area 24, which is located on the side of the first mounting hole 121 facing the accommodating space 11. A second oil outlet 21 is formed between the first concave area 24 and the inner wall of the first mounting hole 121.

[0133] Exemplarily, the first concave area 24 may be formed by a first recessed portion opened on the outer wall surface of the first fixed shaft 2 .

[0134] Exemplarily, the first concave area 24 may be formed by a groove on the outer wall surface of the first fixed shaft 2 .

[0135] Through the above arrangement, the lubricating oil at the first oil outlet 62 can continuously gather between the first concave area 24 and the first side wall portion 123 until the entire second oil outlet 21 is filled, and then contacts the first planetary gear 3 to lubricate the first planetary gear 3 .

[0136] In this way, compared with the lubricating oil at the first oil outlet 62 flowing into the accommodating space 11 through the first gap M, the setting of the second oil outlet 21 can reduce the resistance encountered by the lubricating oil at the first oil outlet 62 when flowing into the accommodating space 11, thereby ensuring that the lubricating oil can normally contact the first planetary gear 3 to ensure the lubricating effect of the lubricating oil on the first planetary gear 3.

[0137] In some embodiments, a second recessed portion is formed on the first side wall portion 123 , and a second oil outlet 21 is formed between an inner wall surface of the second recessed portion and an outer wall surface of the first fixed shaft 2 .

[0138] In some embodiments, the side wall surface of the first fixed shaft 2 includes a first concave area 24, and the first concave area 24 is located on the side of the first mounting hole 121 facing the accommodating space 11. A second recessed portion is formed on the first side wall portion 123. A second oil outlet 21 is formed between the first concave area 24 and the inner wall surface of the second recessed portion.

[0139] In some examples, such as Figure 6 , Figure 7 As shown, a first gap M is formed between a side wall surface of the first fixed shaft 2 in the axial direction of the rotating housing 1 and the first side wall portion 123 , and the first concave area 24 is located on a side wall surface of the first fixed shaft 2 in the axial direction of the rotating housing 1 .

[0140] A second gap is formed between the other side wall surface of the first fixed shaft 2 opposite to the rotating housing 1 in the axial direction and the first side wall portion 123. The portion of the elastic notch 63 opposite to the second gap forms a fifth oil outlet. A second concave area 25 is provided on the other side wall surface of the first fixed shaft 2 opposite to the rotating housing 1 in the axial direction, and another sixth oil outlet is formed between the second concave area 25 and the first side wall portion 123, and the sixth oil outlet is connected to the fifth oil outlet.

[0141] In this way, the lubricating oil at the first oil outlet 62 can flow into the accommodating space 11 through the first oil outlet 62 and the second oil outlet 21, and can also flow into the accommodating space 11 through the fifth oil outlet and the sixth oil outlet. This can speed up the flow rate in the lubricating oil tank accommodating space 11 and speed up the lubrication of the first planetary gear 3.

[0142] At the same time, since the second oil outlet 21 and the sixth oil outlet are located on the opposite sides of the first fixed shaft 2 in the axial direction of the rotating shell 1, during the rotation of the first planetary gear 3, the opposite sides of the first planetary gear 3 can be in contact with the lubricating oil at the same time, so that the lubricating oil can quickly adhere to the entire area of ​​the surface of the first planetary gear 3 facing the side wall portion 12, thereby further accelerating the lubrication of the first planetary gear 3.

[0143] It can be understood that when only one side of the first planetary gear 3 is in contact with the lubricating oil, the first planetary gear 3 needs to rotate at least 360° around its own rotation axis to allow the lubricating oil to adhere to the entire area of ​​the surface of the side facing the side wall portion 12. When both opposite sides of the first planetary gear 3 are in contact with the lubricating oil, the first planetary gear 3 needs to rotate at least 180° around its own rotation axis to allow the lubricating oil to adhere to the entire area of ​​the surface of the side facing the side wall portion 12.

[0144] In some embodiments, Figure 6 , Figure 7 As shown, the differential 10 further includes a gasket 9 , which is sleeved on the first fixed shaft 2 and abuts between the first planetary gear 3 and the side wall portion 12 .

[0145] Exemplarily, the gasket 9 may include a rubber gasket 9, a graphite gasket 9, or the like.

[0146] Through the above arrangement, the first planetary gear 3 will rub against the gasket 9 during rotation. Compared with the friction between the first planetary gear 3 and the side wall portion 12, the gasket 9 can reduce the resistance encountered by the first planetary gear 3 during rotation, so that the first planetary gear 3 can rotate more smoothly, thereby improving the differential effect of the differential 10.

[0147] In some examples, such as Figure 7 As shown, along the axial direction of the rotating housing 1 , the orthographic projection of the gasket 9 on the first concave area 24 is located on the concave area.

[0148] In this way, the gap between the gasket 9 and the first planetary gear 3 can be connected to the second oil outlet 21. After the lubricating oil enters the accommodating space 11 along the concave area, it will gather between the concave area and the inner wall surface of the gasket 9, and then enter the gap between the gasket 9 and the first planetary gear 3. As a result, during the rotation of the first planetary gear 3, it adheres to the entire area of ​​the side surface of the first planetary gear 3 facing the side wall portion 12 and the gasket 9, thereby ensuring the lubricating effect of the lubricating oil on the first planetary gear 3.

[0149] In some embodiments, Figure 2 As shown, the rotating housing 1 further comprises a top wall portion 13 and a bottom wall portion 14. The top wall portion 13 and the bottom wall portion 14 are connected to both sides of the side wall portion 12 in the rotation axis direction of the rotating housing 1.

[0150] The first driven gear 4 is rotatably connected to the top wall portion 13 . The second driven gear 5 is rotatably connected to the bottom wall portion 14 .

[0151] Through the above arrangement, in the process of machining the rotating shell 1, the top wall portion 13 and the bottom wall portion 14 can be machined separately, and before the top wall portion 13 and the bottom wall portion 14 are assembled together, the first driven gear 4 is rotatably connected to the top wall portion 13, and the second driven gear 5 is rotatably connected to the bottom wall portion 14, and then the top wall portion 13 and the bottom wall portion 14 are assembled together.

[0152] In this way, when assembling the first driven gear 4 , it will not be blocked by the bottom wall 14 , and when assembling the second driven gear 5 , it will be blocked by the top wall 13 , which can facilitate the installation of the first driven gear 4 and the second driven gear 5 .

[0153] At the same time, when the first planetary gear 3 and the first fixed shaft 2 are installed on the side wall portion 12 , they will not be blocked by the top wall portion 13 and the bottom wall portion 14 , thus facilitating the installation of the first planetary gear 3 and the first fixed shaft 2 .

[0154] Exemplarily, the side wall portion 12 and the bottom wall portion 14 are integrally formed, and the side wall portion 12 and the top wall portion 13 are assembled and connected.

[0155] Exemplarily, the side wall portion 12 and the top wall portion 13 are integrally formed, and the side wall portion 12 and the bottom wall portion 14 are assembled and connected.

[0156] Through the above arrangement, during the process of assembling the differential 10, after the first driven gear 4 is rotatably connected to the top wall portion 13, the second driven gear 5 is rotatably connected to the bottom wall portion 14, and the first planetary gear 3 and the first fixed shaft 2 are installed on the side wall portion 12, it is only necessary to connect the side wall portion 12 and the bottom wall portion 14 together to complete the assembly of the differential 10.

[0157] In this way, compared with the separate structures among the top wall portion 13 , the side wall portion 12 and the bottom wall portion 14 , the integral molding of the side wall portion 12 and the top wall portion 13 can simplify the assembly process of the differential 10 , thereby facilitating the assembly of the differential 10 .

[0158] In some embodiments, the first positioning hole 122 is a blind hole opened on the side wall portion 12 , and the opening of the blind hole is located on the top wall portion 13 .

[0159] In some embodiments, Figure 2 As shown, one end of the first positioning hole 122 passes through the end surface of the top wall portion 13 facing away from the bottom wall portion 14 , and the other end of the first positioning hole 122 passes through the end surface of the side wall portion 12 facing the bottom wall portion 14 .

[0160] It is understandable that the bottom wall portion 14 blocks the other end opposite to the first positioning hole 122 to ensure that the lubricating oil does not flow out from the other end opposite to the first positioning hole 122 when the lubricating oil fills the entire first flow channel 61 .

[0161] Through the above arrangement, compared with the first positioning hole 122 being a blind hole, when the first positioning hole 122 passes through the side wall portion 12 and the top wall portion 13, the processing difficulty of the first positioning hole 122 can be reduced, thereby facilitating the processing of the first flow channel 61 and facilitating the processing and manufacturing of the top wall portion 13 and the side wall portion 12.

[0162] In some examples, as shown in the figure, an oil guide port 1221 is formed at one end of the first positioning hole 122 , and the radial dimension of the oil guide port 1221 gradually decreases along the direction from the top wall portion 13 to the bottom wall portion 14 .

[0163] In this way, when the lubricating oil flows into the first positioning hole 122 through the oil guide port 1221, more lubricating oil can flow into the oil guide port 1221 through the end with a larger radial dimension of the oil guide port 1221, and then converge to the first flow channel 61 under the guidance of the inner wall surface of the oil guide port 1221. This can accelerate the flow rate of the lubricating oil into the first flow channel 61 and ensure the lubrication effect of the first planetary gear 3.

[0164] In some embodiments, Figure 1 , Figure 2 As shown, the end surface of the top wall portion 13 facing away from the bottom wall portion 14 is provided with an annular rib 131 , and the opening of one end of the first positioning hole 122 penetrating through the end surface of the top wall portion 13 facing away from the bottom wall portion 14 is located in the area formed by the annular rib 131 .

[0165] Exemplarily, the shape of the annular rib 131 can be circular, square, triangular, etc.

[0166] Through the above arrangement, during the rotation of the rotating shell 1, the lubricating oil splashed into the area formed by the annular rib 131 will gather on the inner wall surface of the annular rib 131 under the action of centrifugal force, and then continue to flow into the first positioning hole 122 and the first flow channel 61 under the obstruction of the annular rib 131 until the first flow channel 61 is filled.

[0167] In this way, by providing the annular rib 131 , the lubricating oil can fill the first flow channel 61 , and then enter the accommodating space 11 through the first oil outlet 62 and the second oil outlet 21 to lubricate the first planetary gear 3 and extend the service life of the differential 10 .

[0168] In some examples, along the axial direction of the rotating housing 1 , the orthographic projection of an opening of one end of the first positioning hole 122 penetrating through the end surface of the top wall 13 facing away from the bottom wall 14 on the annular rib 131 is at least partially located on the annular rib 131 .

[0169] In this way, the lubricating oil gathered on the inner wall surface of the annular rib 131 can directly enter the first positioning hole 122 , thereby accelerating the flow rate of the lubricating oil into the accommodating space 11 and ensuring the lubrication effect of the first planetary gear 3 .

[0170] Exemplarily, the annular rib 131 may be located on one side of the first driven wheel in the axial direction of the first fixed shaft 2 .

[0171] For example, Figure 1 As shown, the annular rib 131 is arranged around the axis of the first driven gear 4 .

[0172] Through the above arrangement, the annular rib 131 can block the lubricating oil around the axis of the first driven gear 4 , so that more lubricating oil is gathered on the inner wall surface of the annular rib 131 and then enters the first flow channel 61 through the first positioning hole 122 .

[0173] In this way, during the rotation of the rotating shell 1, the annular rib 131 can continuously gather the lubricating oil to ensure that a sufficient amount of lubricating oil enters the first flow channel 61 through the first positioning hole 122, and then enters the accommodating space 11 through the first oil outlet 62 and the second oil outlet 21, thereby ensuring the lubrication effect of the first planetary gear 3.

[0174] On this basis, in some embodiments, such as Fig.10 As shown, Fig.10 for Figure 3 In the partial enlarged schematic diagram at B in the middle, the annular rib 131 includes a first ring portion 1311 and a second ring portion 1312, and the second ring portion 1312 is connected between the first ring portion 1311 and the top wall portion 13. Along the direction from the top wall portion 13 to the bottom wall portion 14, the radial dimension of the inner wall surface of the first ring portion 1311 gradually increases.

[0175] Exemplarily, the inner wall surface of the annular rib 131 may be a plane or a curved surface.

[0176] Through the above-mentioned arrangement, when the lubricating oil gathers on the inner wall surface of the annular rib 131, under the action of centrifugal force, the lubricating oil will flow along the inner wall surface of the first ring portion 1311 in the direction close to the top wall portion 13, and gather between the inner wall surface of the first ring portion 1311 and the inner wall surface of the second ring portion 1312, thereby preventing the lubricating oil from flowing along the inner wall surface of the first ring portion 1311 in the direction away from the top wall portion 13, so as to achieve the gathering effect of the annular rib 131 on the lubricating oil.

[0177] In some examples, the radial dimension of the inner wall surface of the second ring portion 1312 gradually decreases along the direction from the top wall portion 13 to the bottom wall portion 14. The inner wall surface of the first positioning hole 122 away from the first planetary gear 3 intersects with the inner wall surface of the second ring portion 1312.

[0178] Under the guidance of the inner wall of the second ring portion 1312, the lubricating oil will gradually flow toward the first positioning hole 122, so that the lubricating oil can enter the first positioning hole 122 more smoothly, thereby further increasing the flow rate of the lubricating oil into the accommodating space 11 and ensuring the lubrication effect of the first planetary gear 3.

[0179] When the road wheel on one side of the vehicle slips, due to the setting of the differential 10, the road wheel on the slipping side will drive the first planetary gear 3 to rotate continuously, while the wheel on the non-slipping side will be subject to greater resistance and will remain still, which will make the vehicle unable to escape.

[0180] In order to avoid the above problems, Figure 4 , Fig.11 As shown, Fig.11 for Figure 4 The differential 10 provided in the present application further includes a first matching member 101, a second matching member 102 and a driving assembly 103.

[0181] The first matching member 101 is disposed on a side of the second driven gear 5 facing away from the first driven gear 4. The second matching member 102 and the first matching member 101 are arranged along the axial direction of the rotating housing 1.

[0182] The driving assembly 103 is connected to the second mating piece 102 and is used to drive the second mating piece 102 to move toward the first mating piece 101 so that the first mating piece 101 and the second mating piece 102 are mated to prevent the second driven gear 5 from rotating relative to the rotating housing 1 .

[0183] It can be understood that when the road wheel on one side of the vehicle slips, there is a speed difference between the first driven gear 4 and the rotating housing 1 , and there is also a speed difference between the second driven gear 5 and the rotating housing 1 .

[0184] Through the above arrangement, when one side of the wheel of the vehicle slips, the second mating member 102 and the first mating member 101 can be driven by the driving assembly 103 to cooperate with each other, so that the second driven gear 5 and the rotating shell 1 are relatively fixed. During the rotation of the rotating shell 1, there is no speed difference between the second driven gear 5 and the rotating shell 1, which will limit the first planetary gear 3 to only revolve with the rotating shell 1, and cannot rotate around its own rotation axis.

[0185] In this way, since the first planetary gear 3 can only revolve with the rotating housing 1, the first planetary gear 3 can drive the first driven gear 4 and the second driven gear 5 to rotate at the same speed. In this way, no matter which side of the vehicle's road wheel slips, the road wheels on both sides of the vehicle can rotate at the same speed, so that the vehicle can continue to move and get out of trouble.

[0186] In some embodiments, the driving assembly 103 may be a driving motor, which is used to push the second matching piece 102 to move so that the second matching piece 102 matches the first matching piece 101 .

[0187] In some embodiments, Figure 4 , Fig.11 As shown, the driving assembly 103 includes an electromagnet 1031 , a permanent magnet 1032 and a connecting rod 1033 .

[0188] The electromagnet 1031 is disposed on a side of the bottom wall 14 facing away from the top wall 13 . The permanent magnet 1032 is disposed on a side of the bottom wall 14 facing away from the top wall 13 .

[0189] One end of the connecting rod 1033 is connected to the permanent magnet 1032 . A connecting hole 141 is provided on the bottom wall 14 , through which the connecting rod 1033 passes, and the other end of the connecting rod 1033 is connected to the second matching member 102 .

[0190] Exemplarily, the driving assembly 103 may include one connecting rod 1033 , or may include a plurality of connecting rods 1033 , and correspondingly, the bottom wall portion 14 may include one connecting hole 141 , or may include a plurality of connecting holes 141 .

[0191] It can be understood that the electromagnet 1031 can generate magnetic poles after being energized, and utilize the repulsive force between the electromagnet 1031 and the permanent magnet 1032 to push the permanent magnet 1032 to move.

[0192] Through the above-mentioned arrangement, after the electromagnet 1031 is energized, it can push the permanent magnet 1032 to move toward the direction close to the second driven gear 5. Since the permanent magnet 1032 is connected to the connecting rod 1033, the connecting rod 1033 is connected to the second matching piece 102, and the connecting rod 1033 passes through the connecting hole 141, under the action of the electromagnet 1031, the permanent magnet 1032, the connecting rod 1033 and the second matching piece 102 can be synchronously moved along the axial direction of the connecting hole 141 toward the direction close to the second driven gear 5, thereby realizing the cooperation between the second matching piece 102 and the second matching piece 102, and realizing the driving function of the drive component 103.

[0193] In some examples, such as Figure 4 As shown, the differential 10 further includes a protective shell 104 , which is connected to the side of the bottom wall 14 facing away from the top wall 13 . The axial direction of the protective shell 104 is consistent with the axial direction of the second driven gear 5 , and the second output shaft is disposed inside the protective shell 104 .

[0194] The permanent magnet 1032 includes a magnet, which is arranged around the protective shell 104 along the circumference of the second driven gear 5 and is sleeved on the protective shell 104 to move along the axial direction of the protective shell 104 under the action of the electromagnet 1031 .

[0195] In some examples, the electromagnet 1031 includes a coil that is connected to a gearbox.

[0196] On this basis, in some embodiments, when the first mating piece 101 and the second mating piece 102 need to be separated, the electromagnet 1031 can be energized in the reverse direction so that the electromagnet 1031 generates a polarity opposite to the polarity of the pushing permanent magnet 1032, so that suction is generated between the electromagnet 1031 and the permanent magnet 1032, thereby attracting the permanent magnet 1032 to move in a direction away from the second driven wheel, so as to separate the second mating piece 102 and the first mating piece 101.

[0197] In other embodiments, Figure 4 , Fig.11 As shown, the differential 10 further includes an elastic member 105 , and the elastic member 105 is elastically supported between the first matching member 101 and the second matching member 102 .

[0198] Through the above arrangement, when the electromagnet 1031 is energized, the second mating piece 102 will move toward the first mating piece 101 and mating with the first mating piece 101 , and at this time, the first mating piece 101 and the second mating piece 102 will compress the elastic piece 105 .

[0199] When the electromagnet 1031 is powered off, the elastic member 105 can release the elastic potential energy generated when compressed, pushing the second fitting member 102 to move away from the first fitting member 101, so that the second fitting member 102 is separated from the first fitting member 101, and the second fitting member 102 is reset.

[0200] In this way, by disposing the elastic member 105 , the second matching member 102 can be automatically reset, which can simplify the structure of the differential 10 and facilitate the disposition of the differential 10 .

[0201] Exemplarily, the elastic member 105 may be an elastic tube, an elastic sheet, or the like.

[0202] Exemplarily, the elastic member 105 is a wave spring.

[0203] Through the above arrangement, when the elastic member 105 is compressed to make the first mating member 101 and the second mating member 102 fit together, the wave spring can be compressed to a smaller size along the axial direction of the rotating housing 1, and the first mating member 101 can be easily fitted with the second mating member 102.

[0204] In this way, the first matching piece 101 and the second matching piece 102 do not need to be set to a larger size, so that the first matching piece 101 and the second matching piece 102 can be matched, thereby facilitating the processing and setting of the first matching piece 101 and the second matching piece 102.

[0205] In some examples, such as Fig.11 , Fig.12 As shown, Fig.12 for Fig.11 The schematic diagram of the structure of the first mating piece and the second mating piece in the mating state, the first mating piece 101 includes a plurality of first snap-fitting protrusions 1011, and the plurality of first snap-fitting protrusions 1011 are all connected to the second driven gear 5, and along the circumference of the second driven gear 5, the plurality of first snap-fitting protrusions 1011 are arranged at intervals.

[0206] The second matching member 102 includes a plurality of second clamping protrusions 1021 and a connecting plate 1022 . The connecting plate 1022 is connected to the connecting rod 1033 . The plurality of second clamping protrusions 1021 are connected to a side of the connecting plate 1022 close to the second driven gear 5 .

[0207] When the first matching piece 101 and the second matching piece 102 are matched, a second matching protrusion 1021 is provided between two adjacent first matching protrusions 1011, and the second matching protrusion 1021 contacts both adjacent first matching protrusions 1011. In this way, the first matching piece 101 and the second matching piece 102 are matched.

[0208] The above are only specific implementations of the utility model, but the protection scope of the utility model is not limited to them. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A differential, characterized in that: include: A rotating shell, wherein a housing space is provided in the rotating shell, the rotating shell comprises a side wall portion, the side wall portion is provided with a first mounting hole; the side wall portion is further provided with a first positioning hole, the first positioning hole is communicated with the first mounting hole, and at least one end of the first positioning hole is communicated with an external space of the rotating shell; a first fixed shaft, a portion of which is accommodated in the first mounting hole; a second positioning hole is provided on the portion of the first fixed shaft, the second positioning hole is opposite to and communicates with the first positioning hole; a first gap is provided between the first fixed shaft and the hole wall of the first mounting hole; a first positioning pin, the first positioning pin being accommodated in the first positioning hole and the second positioning hole; a first flow channel being provided in the first positioning pin, one end opening of the first flow channel being opposite to and connected with one end opening of the first positioning hole communicating with the external space of the rotating housing; a first oil outlet being provided at a portion of the side wall of the first positioning pin opposite to the first gap, the first oil outlet being connected with the first flow channel; The part of the side wall between the first positioning hole and the accommodating space is the first side wall, and a second oil outlet is provided between the first side wall and the side wall surface of the first fixed shaft; the second oil outlet is connected to the first oil outlet; a first planetary gear, the first planetary gear being accommodated in the accommodation space and rotatably connected to the first fixed shaft; a first driven gear, the first driven gear being accommodated in the accommodation space; the first driven gear being rotatably connected to the rotating housing, and the first driven gear being coaxially arranged with respect to the rotating axis of the rotating housing; A second driven gear, the second driven gear is accommodated in the accommodating space; the second driven gear is rotatably connected to the rotating shell, and the second driven gear is coaxially arranged with respect to the rotating axis of the rotating shell; the first planetary gear is meshed with the second driven gear and the first driven gear.

2. The differential according to claim 1, characterized in that: The first flow channel extends along the length direction of the first positioning pin and passes through the first positioning pin.

3. The differential according to claim 2, characterized in that: The first positioning pin is provided with an elastic notch, which is located on the side of the first flow channel facing the accommodating space. The elastic notch extends along the length direction of the first positioning pin and passes through the first positioning pin. The part of the elastic notch opposite to the first gap forms the first oil outlet.

4. The differential according to claim 1, characterized in that: The side wall surface of the first fixed shaft includes a first concave area, and the first concave area is located on the side of the first mounting hole facing the accommodating space; the second oil outlet is formed between the first concave area and the inner wall surface of the first mounting hole.

5. The differential according to claim 1, characterized in that: The differential further includes a washer, which is sleeved on the first fixed shaft and abuts between the first planetary gear and the side wall portion.

6. The differential according to any one of claims 1 to 5, characterized in that: The side wall portion is provided with a second mounting hole; the side wall portion is also provided with a third positioning hole, the third positioning hole is communicated with the second mounting hole, and at least one end of the third positioning hole is communicated with the external space of the rotating shell; Another portion of the first fixed shaft is accommodated in the second mounting hole; a fourth positioning hole is provided on the other portion of the first fixed shaft, and the fourth positioning hole is opposite to and connected to the third positioning hole; a second gap is provided between the first fixed shaft and the hole wall of the second mounting hole; The differential also includes: a second positioning pin, the second positioning pin being received in the third positioning hole and the fourth positioning hole; a second flow channel being provided in the second positioning pin; a third oil outlet being provided at a portion of the side wall of the second positioning pin opposite to the second gap, the third oil outlet being communicated with the second flow channel; The part of the side wall between the third positioning hole and the accommodating space is the second side wall, and a fourth oil outlet is provided between the second side wall and the side wall surface of the first fixed shaft; the fourth oil outlet is connected to the third oil outlet; The second planetary gear is accommodated in the accommodation space and is rotatably connected to the first fixed shaft; the second planetary gear is meshed with both the first driven gear and the second driven gear.

7. The differential according to any one of claims 1 to 5, characterized in that: The rotating housing further comprises a top wall portion and a bottom wall portion; the top wall portion and the bottom wall portion are connected to both sides of the side wall portion in the rotation axis direction of the rotating housing; The first driven gear is rotatably connected to the top wall portion; the second driven gear is rotatably connected to the bottom wall portion.

8. The differential according to claim 7, characterized in that: The side wall portion and the top wall portion are integrally formed, and the side wall portion and the bottom wall portion are assembled and connected.

9. The differential according to claim 8, characterized in that: One end of the first positioning hole passes through an end surface of the top wall portion facing away from the bottom wall portion, and the other opposite end of the first positioning hole passes through an end surface of the side wall portion facing the bottom wall portion.

10. The differential according to claim 9, characterized in that: The end surface of the top wall portion facing away from the bottom wall portion is provided with an annular convex rib, and an opening of one end of the first positioning hole penetrating through the end surface of the top wall portion facing away from the bottom wall portion is located in the area formed by the annular convex rib.

11. The differential according to claim 10, characterized in that: The annular rib is arranged around the axis of the first driven gear.

12. The differential according to claim 10, characterized in that: The annular rib includes a first ring portion and a second ring portion, wherein the second ring portion is connected between the first ring portion and the top wall portion; along the direction from the top wall portion toward the bottom wall portion, the radial dimension of the inner wall surface of the first ring portion gradually increases.

13. The differential according to claim 7, characterized in that: The differential also includes: a first matching piece, the first matching piece being arranged on a side of the second driven gear facing away from the first driven gear; a second matching piece, wherein the second matching piece and the first matching piece are arranged along the axial direction of the rotating shell; A driving assembly is connected to the second mating piece and is used to drive the second mating piece to move toward the first mating piece so that the first mating piece and the second mating piece are mated to prevent the second driven gear from rotating relative to the rotating housing.

14. The differential according to claim 13, characterized in that: The drive components include: an electromagnet, the electromagnet being disposed on a side of the bottom wall portion facing away from the top wall portion; A permanent magnet, the permanent magnet being arranged on a side of the bottom wall portion facing away from the top wall portion; A connecting rod, one end of which is connected to the permanent magnet; a connecting hole is provided on the bottom wall portion, the connecting rod passes through the connecting hole, and the other end of the connecting rod opposite to the second matching piece is connected.

15. The differential according to claim 14, characterized in that The differential further includes an elastic member elastically supported between the first mating member and the second mating member.

16. A speed change device, characterized in that: include: The differential as claimed in any one of claims 1 to 15; a gearbox, wherein the differential is arranged in the gearbox; A shift assembly is arranged in the gearbox; the shift assembly includes a transmission shaft, the transmission shaft is connected to the differential, and the shift assembly is used to adjust the transmission ratio between the transmission shaft and the differential.

17. A powertrain, characterized in that: include: The speed change device as claimed in claim 16; An engine, the engine is connected to the transmission shaft and is used to drive the transmission shaft to rotate; a first output shaft connected to the first driven gear; A second output shaft is connected to the second driven gear.

18. A vehicle, characterized in that: include: The powertrain as claimed in claim 17; a vehicle body, wherein the power assembly is arranged on the vehicle body; a first road wheel connected to the first output shaft of the power assembly; A second road wheel, wherein the second road wheel is connected to the second output shaft of the power assembly.

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