Drive axle assembly and vehicle

Abstract

The utility model discloses a drive axle assembly and a vehicle. The drive axle assembly comprises a drive part, a differential mechanism and a first transmission shaft. The driving part is provided with an output shaft, the differential mechanism is provided with a first end and a second end oppositely arranged in the axial direction of the output shaft, the output shaft is in transmission connection with the first end, and the first transmission shaft is in transmission connection with the second end. The output shaft and the first transmission shaft are each provided with a stop part, and the stop parts are used for limiting the displacement of the differential mechanism in the axial direction of the output shaft. Thus, when the driving piece drives the differential mechanism to rotate, the differential mechanism is limited between the two stop parts, and the stability of connection between the driving piece and the differential mechanism and the stability of connection between the first transmission shaft and the differential mechanism are improved; and the problem of failure of the differential mechanism caused by relative displacement between the differential mechanism and the driving piece and relative displacement between the first transmission shaft and the differential mechanism is avoided.

Description

Technical Field

[0001] The present application belongs to the technical field of drive axles, and in particular relates to a drive axle assembly and a vehicle. Background Art

[0002] With the development of my country's logistics economy, forklifts have become more common, and the design and manufacturing of forklift transmission components have gradually matured. As forklifts are moving toward new energy sources, transmission components are also trending toward integrated designs. The drive axle assembly in a forklift includes a differential, which enables the left and right (or front and rear) drive wheels to rotate at different speeds. It primarily consists of left and right axle gears, two planetary gears, and a gear rack. Its function is to ensure that the left and right wheels roll at different speeds when the vehicle is turning or driving on uneven roads, ensuring pure rolling motion of the drive wheels on both sides. The differential is installed to adjust the speed difference between the left and right wheels.

[0003] In related technologies, a differential is connected to a drive shaft at each end, and the differential is positioned axially through the connection between the drive shaft and the differential. However, as the motor speed increases, relative displacement occurs between the drive shaft and the differential, resulting in poor connection stability between the two. Utility Model Content

[0004] The present application aims to provide a drive axle assembly and a vehicle that can solve the problem of unstable connection between the drive shaft and the differential in the prior art.

[0005] In order to solve the above technical problems, this application is implemented as follows:

[0006] In a first aspect, an embodiment of the present application provides a drive axle assembly, comprising: a drive member, a differential, and a first transmission shaft;

[0007] The driving member has an output shaft, and the differential has a first end and a second end arranged opposite to each other along the axial direction of the output shaft. The output shaft is transmission-connected to the first end, and the first transmission shaft is transmission-connected to the second end; a stop portion is respectively provided on the output shaft and the first transmission shaft, and the stop portion is used to limit the displacement of the differential in the axial direction of the output shaft.

[0008] Optionally, the stop portion includes a first stop member; the first stop member is provided on the output shaft, the first stop member at least partially contacts the first end to form the stop portion, and the first stop member is used to limit the relative displacement between the differential and the output shaft.

[0009] Optionally, the first stopper is arranged around at least a portion of the circumference of the output shaft.

[0010] Optionally, a first limiting groove is provided on the output shaft, and the first stopper is at least partially connected to the first limiting groove.

[0011] Optionally, the first stopper includes an annular first stopper body, which is sleeved on the output shaft and contacts the first end to limit the relative displacement between the differential and the output shaft; a radial first opening is provided in the first stopper body for allowing the output shaft to be clamped into the first stopper body.

[0012] Optionally, the first stopper further includes a first adjusting portion; the first adjusting portion is provided at the first opening, and the first adjusting portion is connected to the first stopper body, and is used to adjust the size of the first opening.

[0013] Optionally, along the axial direction of the output shaft, an orthographic projection of the first stopper at least partially coincides with an orthographic projection of the first end of the differential.

[0014] Optionally, the stop portion includes a second stop member; the second stop member is provided on the first transmission shaft, the second stop member at least partially contacts the second end to form the stop portion, and the second stop member is used to limit the relative displacement between the differential and the first transmission shaft.

[0015] Optionally, the second stopper is arranged around at least a portion of the circumference of the first transmission shaft.

[0016] Optionally, a second limiting groove is provided on the first transmission shaft, and the second stopper is at least partially connected to the second limiting groove.

[0017] Optionally, the second stop member includes an annular second stop member body, which is sleeved on the first transmission shaft and contacts the first end to limit the relative displacement between the differential and the first transmission shaft; a radial second opening is provided in the second stop member body for allowing the first transmission shaft to be clamped into the second stop member body.

[0018] Optionally, the second stopper further includes a second adjusting portion; the second adjusting portion is provided at the second opening, and the second adjusting portion is connected to the second stopper body for adjusting the size of the second opening.

[0019] Optionally, along the axial direction of the output shaft, an orthographic projection of the second stopper at least partially coincides with an orthographic projection of the second end of the differential.

[0020] Optionally, the first transmission shaft is spline-connected to the differential to form a first positioning surface, and the first positioning surface is used to radially position the differential.

[0021] Optionally, the differential includes a first half-shaft gear and a housing; the housing is transmission-connected to the output shaft, the housing has a mounting cavity, the first half-shaft gear is arranged in the mounting cavity, the first half-shaft gear is transmission-connected to the housing, the first half-shaft gear is provided with a first internal spline, the first transmission shaft is provided with a first external spline, the first half-shaft gear is sleeved on the first transmission shaft, and the first internal spline and the first external spline are meshed to form the first positioning surface.

[0022] Optionally, a second transmission shaft is further included; the second transmission shaft is arranged in the output shaft, the second transmission shaft is spline-connected with the differential to form a second positioning surface, and the second positioning surface is used to radially position the differential.

[0023] Optionally, the differential includes a second side gear; the second side gear is arranged in the mounting cavity and is arranged opposite to the first side gear; the second side gear is transmission-connected to the housing, a second internal spline is provided in the second side gear, the second transmission shaft is provided with a second external spline, the second side gear is sleeved on the second transmission shaft, and the second internal spline and the second external spline are meshed to form the second positioning surface.

[0024] Optionally, it also includes a first bearing; the output shaft has a hollow channel, and the second transmission shaft is at least partially arranged in the hollow channel; the first bearing is arranged between the second transmission shaft and the output shaft, and the second transmission shaft is rotatably connected to the output shaft through the first bearing.

[0025] Optionally, the differential further comprises a second bearing; the second bearing is arranged between the first side gear and the housing; and / or the second bearing is arranged between the second side gear and the housing.

[0026] In a second aspect, an embodiment of the present application proposes a vehicle comprising a drive axle assembly according to the above embodiment.

[0027] In an embodiment of the present application, the output shaft of the driving member is drivingly connected to the first end of the differential, and the first transmission shaft is drivingly connected to the second end of the differential. Stops are provided on the output shaft and the first transmission shaft, respectively, to limit the axial displacement of the differential along the output shaft. Thus, when the driving member drives the differential to rotate, the differential is restrained between the two stops, thereby improving the stability of the connection between the driving member and the differential, as well as the stability of the connection between the first transmission shaft and the differential, and preventing the problem of differential failure caused by relative displacement between the differential and the driving member, or between the first transmission shaft and the differential.

[0028] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0030] Figure 1 is a schematic diagram of a drive axle assembly according to an embodiment of the present application;

[0031] Figure 2 It is along Figure 1 Cross-sectional view along line AA;

[0032] Figure 3 yes Figure 2 An enlarged view of the circled section B;

[0033] Figure 4 is an exploded view of a differential according to an embodiment of the present application;

[0034] Figure 5 It is an enlarged view of the cooperation between the differential and the second stop member according to an embodiment of the present application.

[0035] Reference numerals:

[0036] 1-driving member; 2-first transmission shaft; 3-first stopper; 4-second stopper; 41-second stopper body; 42-second adjustment portion; 43-second opening; 5-differential; 51-mounting cavity; 511-first side gear; 512-second side gear; 52-housing; 521-first housing; 522-second housing; 53-transmission assembly; 531-first planetary gear; 532-first fixed shaft; 54-latch; 55- Second bearing; 56-gasket; 57-through hole; 58-fastener; 6-output shaft; 7-first limiting groove; 8-second limiting groove; 9-first positioning surface; 10-second positioning surface; 11-first bearing; 12-driven gear; 13-second planetary gear; 14-ring gear; 15-sun gear shaft; 16-planet carrier; 17-oil hole; 18-bridge housing; 19-spline sleeve; 20-second transmission shaft; 21-second fixed shaft; 22-sealing chamber. DETAILED DESCRIPTION

[0037] The embodiments of the present application will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application and are not to be construed as limiting the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present application.

[0038] The terms "first" and "second" in the specification and claims of this application may explicitly or implicitly refer to one or more of the features. Throughout the description of this application, unless otherwise specified, "plurality" means two or more. Furthermore, "and / or" in the specification and claims refers to at least one of the connected entities, and the character " / " generally indicates an "or" relationship between the connected entities.

[0039] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0040] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0041] The drive axle assembly and vehicle provided in the embodiments of the present application are described in detail below through specific embodiments and their application scenarios in conjunction with the accompanying drawings.

[0042] like Figures 2 to 3 As shown, the drive axle assembly according to some embodiments of the present application includes: a driving member 1, a differential 5 and a first transmission shaft 2; the driving member 1 has an output shaft 6, and the differential 5 has a first end and a second end relatively set along the axial direction of the output shaft, the output shaft 6 is transmission-connected to the first end, and the first transmission shaft 2 is transmission-connected to the second end; a stop portion is respectively provided on the output shaft 6 and the first transmission shaft 2, and the stop portion is used to limit the axial displacement of the differential 5 on the output shaft 6.

[0043] In the embodiment of the present application, the output shaft 6 of the driver 1 is drivingly connected to the first end of the differential 5, and the first transmission shaft 2 is drivingly connected to the second end of the differential 5; the output shaft 6 and the first transmission shaft 2 are respectively provided with a stopper, which is used to limit the axial displacement of the differential 5 on the output shaft 6. In this way, when the driver 1 drives the differential 5 to rotate, the differential 5 is restrained between the two stoppers, thereby improving the stability of the connection between the driver 1 and the differential 5 and the stability of the connection between the first transmission shaft 2 and the differential 5, and avoiding the problem of relative displacement between the differential 5 and the driver 1 and between the first transmission shaft 2 and the differential 5, which may cause the differential 5 to fail.

[0044] In some embodiments, as Figure 1 As shown, the drive axle assembly further includes an axle housing 18, which is connected to the housing of the drive member 1; Figure 3 As shown, a sealed cavity 22 is provided in the axle housing 18, and the differential 5 is disposed in the sealed cavity 22. A lubricant is provided in the sealed cavity 22 for lubricating and dissipating heat for the differential 5. Furthermore, an oil hole 17 is provided in the axle housing 18, communicating with the sealed cavity 22, for admitting the lubricant.

[0045] Alternatively, as Figure 3As shown, the stop portion includes a first stop member 3; the first stop member 3 is provided on the output shaft 6, and the first stop member 3 is at least partially in contact with the first end to form a stop portion, and the first stop member 3 is used to limit the relative displacement between the differential 5 and the output shaft 6.

[0046] In the embodiment of the present application, the first stopper 3 is provided on the output shaft 6, and the first stopper 3 at least partially contacts the first end to form a stop portion. The first stopper 3 is used to limit the relative displacement between the differential 5 and the output shaft 6. In this way, by providing the first stopper 3 in contact with the first end to form a stop portion, the relative displacement between the output shaft 6 and the differential 5 can be limited by the contact portion.

[0047] In some embodiments, as Figure 3 As shown, the output shaft 6 is connected to the first housing 521 of the differential 5 through a spline, and a first stopper 3 is provided at the corresponding position of the output shaft 6 and the first housing 521. The first stopper 3 is at least partially in contact with the first housing 521 of the differential 5, thereby forming a positioning for the differential 5.

[0048] In other embodiments, the first stopper 3 can be a cut retaining ring, a screw-locked retaining ring, a shoulder retaining ring, or other types of retaining rings. For example, the first stopper 3 can be a cut retaining ring for axial positioning of the differential 5; the cut retaining ring is a cut-shaped annular retaining ring that is mounted on the output shaft 6 of the motor and the first transmission shaft 2, respectively, and then fixed to the shafts by pins, screws, or other components to achieve the purpose of positioning.

[0049] Alternatively, as Figure 3 As shown, the first stopper 3 is arranged around at least a portion of the circumference of the output shaft 6 .

[0050] In the embodiment of the present application, the first stopper 3 is arranged to surround at least a portion of the circumference of the output shaft 6. In this way, the amount of the first stopper 3 used can be reduced, thereby reducing production costs.

[0051] In some embodiments, the first stop 3 can be set to be fan-shaped, and the fan-shaped first stop 3 is set on a portion of the circumference of the output shaft 6; further, the fan-shaped first stop 3 can be set to be multiple, and multiple fan-shaped first stops 3 are set at intervals along the circumference of the output shaft 6.

[0052] Alternatively, as Figure 3 As shown, a first limiting groove 7 is provided on the output shaft 6 , and the first stopper 3 is at least partially connected to the first limiting groove 7 .

[0053] In the embodiment of the present application, the first stopper 3 is at least partially connected to the first limit groove 7 by providing the first limit groove 7 on the output shaft 6. This facilitates the installation of the first stopper 3 on the output shaft 6 through the first limit groove 7. In addition, the first stopper 3 can be embedded in the first limit groove 7, thereby enhancing the connection strength between the first stopper 3 and the output shaft 6.

[0054] Optionally, the first stopper 3 includes an annular first stopper body, which is sleeved on the output shaft 6 and contacts the first end to limit the relative displacement between the differential 5 and the output shaft 6; a radial first opening is provided in the first stopper body for the output shaft 6 to be clamped into the first stopper body.

[0055] In the embodiment of the present application, the first stopper body is sleeved onto the output shaft 6, contacting the first end to limit relative displacement between the differential 5 and the output shaft 6. A first radial opening is provided in the first stopper body for receiving the output shaft 6. The provision of the first radial opening facilitates elastic deformation of the first stopper body in the radial direction, thereby facilitating installation of the first stopper body on the output shaft 6.

[0056] Optionally, the first stopper 3 further includes a first adjusting portion; the first adjusting portion is provided at the first opening, and the first adjusting portion is connected to the first stopper body, and is used to adjust the size of the first opening.

[0057] In the embodiment of the present application, the first adjusting portion is provided at the first opening and connected to the first stopper body. In this way, the size of the first opening can be adjusted by the first adjusting portion to facilitate installation of the first stopper body on the output shaft 6.

[0058] In some embodiments, two first adjustment parts may be provided, each of which is provided with a clamping hole, and the user may insert the jaws of the circlip pliers into the clamping hole to adjust the distance between the two first adjustment parts, thereby adjusting the size of the first opening.

[0059] Alternatively, as Figures 3 and 4 As shown, along the axial direction of the output shaft 6 , the orthographic projection of the first stopper 3 at least partially coincides with the orthographic projection of the first end of the differential 5 .

[0060] In the embodiment of the present application, the orthographic projection of the first stopper 3 is arranged to at least partially overlap with the orthographic projection of the first end of the differential 5. Thus, when the output shaft 6 and the differential 5 move toward each other, the output shaft 6 can abut against the differential 5 via the first stopper 3 to form a position limit. Furthermore, when the first transmission shaft 2 and the differential 5 move away from each other, the first transmission shaft 2 can abut against the differential 5 via the first stopper 3 to form a position limit.

[0061] Optionally, the stop portion includes a second stop member 4; the second stop member 4 is provided on the first transmission shaft 2, and the second stop member 4 at least partially contacts the second end to form a stop portion, and the second stop member 4 is used to limit the relative displacement between the differential 5 and the first transmission shaft 2.

[0062] In the embodiment of the present application, the second stopper 4 is provided on the first transmission shaft 2, and the second stopper 4 at least partially contacts the second end to form a stop portion. The second stopper 4 is used to limit the relative displacement between the differential 5 and the first transmission shaft 2. By providing the second stopper 4 in contact with the second end to form a stop portion, the relative displacement between the first transmission shaft 2 and the differential 5 can be limited by the contact portion.

[0063] In some embodiments, the second stopper 4 can be configured as the same type of stopper as the first stopper 3 , or can be configured as a different type of stopper, which is not limited in the embodiments of the present application.

[0064] In some embodiments, as Figures 3 to 5 As shown, the first transmission shaft 2 is connected to the second housing 522 of the differential 5 through a spline, and a second stopper 4 is provided at the corresponding position of the first transmission shaft 2 and the first housing 521. The second stopper 4 is at least partially in contact with the first housing 521 of the differential 5, thereby forming a positioning for the differential 5.

[0065] Optionally, the second stopper 4 is arranged around at least a portion of the circumference of the first transmission shaft 2 .

[0066] In the embodiment of the present application, the second stopper 4 is arranged to surround at least a portion of the circumference of the first transmission shaft 2. In this way, the amount of the second stopper 4 used can be reduced, thereby reducing production costs.

[0067] In some embodiments, the second stop 4 can be set to be fan-shaped, and the fan-shaped second stop 4 is set on a partial circumference of the first transmission shaft 2; further, the fan-shaped second stop 4 can be set to multiple, and multiple fan-shaped second stops 4 are set at intervals along the circumference of the first transmission shaft 2.

[0068] Alternatively, as Figure 4 and Figure 5 As shown, a second limiting groove 8 is provided on the first transmission shaft 2 , and the second stopper 4 is at least partially connected to the second limiting groove 8 .

[0069] In the embodiment of the present application, the second limiting groove 8 is provided on the first transmission shaft 2, and the second stopper 4 is at least partially connected to the second limiting groove 8. This facilitates the installation of the second stopper 4 on the first transmission shaft 2 through the second limiting groove 8; moreover, the second stopper 4 can be embedded in the second limiting groove 8, thereby enhancing the connection strength between the second stopper 4 and the first transmission shaft 2.

[0070] Alternatively, as Figure 5 As shown, the second stopper 4 includes an annular second stopper body 41, which is sleeved on the first transmission shaft 2. The second stopper body 41 contacts the first end to limit the relative displacement between the differential 5 and the first transmission shaft 2; a radial second opening 43 is provided in the second stopper body 41 for allowing the first transmission shaft 2 to be clamped into the second stopper body 41.

[0071] In the embodiment of the present application, the second stopper body 41 is sleeved onto the first transmission shaft 2, with the second stopper body 41 contacting the first end to limit relative displacement between the differential 5 and the first transmission shaft 2. A radial second opening 43 is provided in the second stopper body 41 for allowing the first transmission shaft 2 to engage with the second stopper body 41. The provision of the radial second opening 43 facilitates elastic deformation of the second stopper body 41 in the radial direction, thereby facilitating installation of the second stopper body 41 on the first transmission shaft 2.

[0072] Optionally, the second stopper 4 further includes a second adjusting portion 42 ; the second adjusting portion 42 is provided at the second opening 43 , and the second adjusting portion 42 is connected to the second stopper body 41 for adjusting the size of the second opening 43 .

[0073] In the embodiment of the present application, the second adjusting portion 42 is provided at the second opening 43, and the second adjusting portion 42 is connected to the second stopper body 41. In this way, the size of the second opening 43 can be adjusted by the second adjusting portion 42, so as to facilitate the installation of the second stopper body 41 on the first transmission shaft 2.

[0074] In some embodiments, the second adjustment portion 42 can be set to two, and each second adjustment portion 42 is provided with a clamping hole. The user can insert the jaws of the circlip pliers into the clamping hole to adjust the distance between the two second adjustment portions 42, thereby adjusting the size of the second opening 43.

[0075] Alternatively, as Figures 3 to 5 As shown, along the axial direction of the output shaft 6 , the orthographic projection of the second stopper 4 at least partially coincides with the orthographic projection of the second end of the differential 5 .

[0076] In this embodiment of the present application, the orthographic projection of the second stopper 4 is configured to at least partially overlap with the orthographic projection of the first end of the differential 5. Thus, when the first drive shaft 2 and the differential 5 move toward each other, the first drive shaft 2 can abut against the differential 5 via the second stopper 4, thereby limiting its position. Furthermore, when the output shaft 6 and the differential 5 move away from each other, the output shaft 6 can abut against the differential 5 via the second stopper 4, thereby limiting its position.

[0077] Alternatively, as Figures 3 and 4 As shown, the first transmission shaft 2 is spline-connected with the differential 5 to form a first positioning surface 9 , which is used to radially position the differential 5 .

[0078] In the embodiment of the present application, a first positioning surface 9 is formed by providing a spline connection between the first transmission shaft 2 and the differential 5. The first positioning surface 9 is used to radially position the differential 5. This helps to improve the positioning accuracy of the differential 5 and the connection strength between the differential 5 and the first transmission shaft 2, thereby increasing the service life of the differential 5.

[0079] In some embodiments, the spline connection between the first transmission shaft 2 and the differential 5 can be connected through a rectangular spline or an involute spline, and this application does not impose any restrictions thereon.

[0080] Alternatively, as Figures 2 to 4 As shown, the differential 5 includes a first half-shaft gear 511 and a housing 52; the housing 52 is transmission-connected to the output shaft 6, the housing 52 has a mounting cavity 51, the first half-shaft gear 511 is arranged in the mounting cavity 51, the first half-shaft gear 511 is transmission-connected to the housing 52, the first half-shaft gear 511 is provided with a first internal spline, the first transmission shaft 2 is provided with a first external spline, the first half-shaft gear 511 is sleeved on the first transmission shaft 2, and the first internal spline and the first external spline are meshed to form a first positioning surface 9.

[0081] In the embodiment of the present application, the housing 52 is drivingly connected to the output shaft 6. The housing 52 has a mounting cavity 51. The first side gear 511 is disposed in the mounting cavity 51. The first side gear 511 is drivingly connected to the housing 52. The first side gear 511 is provided with a first internal spline. The first transmission shaft 2 is provided with a first external spline. The first side gear 511 is sleeved on the first transmission shaft 2. The first internal spline and the first external spline mesh together to form a first positioning surface 9. In this way, the first positioning surface 9 formed by the meshing of the first internal spline and the first external spline facilitates improving the positioning accuracy of the differential 5 and the connection strength between the differential 5 and the first transmission shaft 2, thereby increasing the service life of the differential 5.

[0082] It should be noted that the first positioning surface 9 is formed by the contact between the plane where the first internal spline is located and the plane where the first external spline is located.

[0083] Alternatively, as Figures 3 and 4 As shown, it also includes a second transmission shaft 20; the second transmission shaft 20 is arranged in the output shaft 6, and the second transmission shaft 20 is spline-connected with the differential 5 to form a second positioning surface 10, which is used to radially position the differential 5.

[0084] In the embodiment of the present application, the second transmission shaft 20 is disposed in the output shaft 6, and the second transmission shaft 20 is spline-connected to the differential 5 to form a second positioning surface 10. The second positioning surface 10 is used to radially position the differential 5. This helps to improve the positioning accuracy of the differential 5 and the connection strength between the differential 5 and the second transmission shaft 20, thereby increasing the service life of the differential 5.

[0085] In some embodiments, the spline connection between the second transmission shaft 20 and the differential 5 can be connected through a rectangular spline or an involute spline, and this application does not impose any restrictions thereon.

[0086] Alternatively, as Figures 2 to 4 As shown, the differential 5 includes a second side gear 512; the second side gear 512 is arranged in the mounting cavity 51 and is arranged opposite to the first side gear 511; the second side gear 512 is transmission-connected with the housing 52, a second internal spline is provided in the second side gear 512, and a second external spline is provided on the second transmission shaft 20. The second internal spline and the second external spline are meshed to form a second positioning surface 10.

[0087] In the embodiment of the present application, the second side gear 512 is disposed in the mounting cavity 51 and is arranged opposite the first side gear 511. The second side gear 512 is drivingly connected to the housing 52. The second side gear 512 is provided with a second internal spline, and the second transmission shaft 20 is provided with a second external spline. The second side gear 512 is sleeved on the second transmission shaft 20, and the second internal spline and the second external spline mesh together to form the second positioning surface 10. Thus, the meshing of the second internal spline and the second external spline to form the second positioning surface 10 facilitates improving the positioning accuracy of the differential 5 and the connection strength between the differential 5 and the second transmission shaft 20, thereby increasing the service life of the differential 5.

[0088] In some embodiments, as Figures 2 to 4As shown, the differential 5 also includes a transmission assembly 53, which is disposed within the mounting cavity 51 and connected to the housing 52. A first side gear 511 and a second side gear 512 are disposed on either side of the transmission assembly 53 and mesh with the transmission assembly 53. Thus, the output shaft 6 transmits power to the housing 52, which in turn transmits the power to the transmission assembly 53. The transmission assembly 53 then transmits the power to the first side gear 511 and the second side gear 512, respectively. The first side gear 511 transmits the power to the first transmission shaft 2, while the second side gear 512 transmits the power to the second transmission shaft 20, thereby achieving power distribution.

[0089] In some embodiments, as Figure 3 and Figure 4 As shown, the housing 52 includes a first housing 521 and a second housing 522, which are connected by fasteners 58 to enclose the mounting cavity 51. A plurality of through-holes 57 are defined in the second housing 522, connecting the mounting cavity 51 with the sealed cavity 22. Thus, lubricating medium in the sealed cavity 22 can enter the mounting cavity 51 through the through-holes 57, providing lubrication and heat dissipation for the transmission assembly 53, the first side gear 511, and the second side gear 512 within the mounting cavity 51.

[0090] In some embodiments, as Figure 3 and Figure 4 As shown, the transmission assembly 53 includes two first planetary gears 531 and a first fixed shaft 532. The first fixed shaft 532 is fixed to the second housing 522 via a latch 54. The two first planetary gears 531 are sleeved on the first fixed shaft 532 along its axial direction. The two first planetary gears 531 are respectively engaged with the first side gear 511 and the second side gear 512. Thus, the first fixed shaft 532 rotates with the second housing 522. The first fixed shaft 532 transmits power to the two first planetary gears 531, which in turn transmit power to the first side gear 511 and the second side gear 512.

[0091] In addition, if Figure 3 As shown, a gasket 56 is provided between the first planetary gear 531 and the second housing 522 , thereby reducing the friction between the first planetary gear 531 and the second housing 522 , thereby increasing the service life of the first planetary gear 531 .

[0092] In other embodiments, Figure 2As shown, the drive axle assembly also includes a driven gear 12, a second planetary gear 13, a second fixed shaft 21, a ring gear 14, a sun gear shaft 15 and a planet carrier 16; the driven gear 12 is meshed with the first transmission member, the sun gear shaft 15 is mounted on the driven gear 12 by a spline or interference fit, the second planetary gear 13 is meshed with the sun gear shaft 15, the second planetary gear 13 is sleeved in the second fixed shaft 21, the second fixed shaft 21 is mounted on the planet carrier 16, and the second planetary gear 13 is also meshed with the ring gear 14; therefore, the first transmission member transmits power to the sun gear shaft 15 through the driven gear 12, the sun gear shaft 15 transmits power to the second planetary gear 13, and the second planetary gear 13 transmits power to the planet carrier 16; at the same time, the wheels of the vehicle can be mounted on the planet carrier 16, so that the rotation of the planet carrier 16 can drive the wheels to rotate, thereby realizing the vehicle's forward, backward and turning.

[0093] It should be noted that the second positioning surface 10 is formed by the contact between the plane where the second internal spline is located and the plane where the second external spline is located.

[0094] Alternatively, as Figures 2 to 3 As shown, it also includes a first bearing 11; the output shaft 6 has a hollow channel, and the second transmission shaft 20 is at least partially arranged in the hollow channel; the first bearing 11 is arranged between the second transmission shaft 20 and the output shaft 6, and the second transmission shaft 20 is rotatably connected to the output shaft 6 through the first bearing 11.

[0095] In the embodiment of the present application, the first transmission shaft 2 is disposed in the hollow channel; the first bearing 11 is disposed between the transmission shaft and the output shaft 6, and the second transmission shaft 20 is rotatably connected to the output shaft 6 via the first bearing 11. In this way, the first bearing 11 can improve the positioning accuracy between the second transmission shaft 20 and the output shaft 6, thereby improving the positioning accuracy between the second transmission shaft 20 and the first side gear 511.

[0096] In some embodiments, as Figure 2 As shown, the drive axle assembly further includes a spline sleeve 19 , and a first transmission shaft 2 is provided on the right side of the second transmission shaft 20 . The first transmission shaft 2 is spline-connected to the second transmission shaft 20 via the spline sleeve 19 .

[0097] Alternatively, as Figures 3 and 4 As shown, the differential 5 further includes a second bearing 55 ; the second bearing 55 is provided between the first side gear 511 and the housing 52 .

[0098] In the embodiment of the present application, the second bearing 55 is disposed between the first side gear 511 and the housing 52. This helps to improve the positioning accuracy between the first side gear 511 and the housing 52; in addition, it can also reduce the friction between the first side gear 511 and the housing 52, thereby increasing the service life of the first side gear 511.

[0099] Specifically, the second bearing 55 is provided between the first side gear 511 and the first housing 521 .

[0100] Alternatively, as Figures 2 to 4 As shown, the second bearing 55 is also provided between the second side gear 512 and the housing 52 .

[0101] In the embodiment of the present application, the second bearing 55 is disposed between the second side gear 512 and the housing 52. This helps to improve the positioning accuracy between the second side gear 512 and the housing 52; in addition, it can also reduce the friction between the second side gear 512 and the housing 52, thereby increasing the service life of the second side gear 512.

[0102] Specifically, the second bearing 55 may also be provided between the second side gear 512 and the second housing 522 .

[0103] In a second aspect, an embodiment of the present application proposes a vehicle comprising a drive axle assembly according to the above embodiment.

[0104] In the embodiment of the present application, the output shaft 6 of the driver 1 is drivingly connected to the first end of the differential 5, and the first transmission shaft 2 is drivingly connected to the second end of the differential 5; the output shaft 6 and the first transmission shaft 2 are respectively provided with a stopper, which is used to limit the axial displacement of the differential 5 on the output shaft 6. In this way, when the driver 1 drives the differential 5 to rotate, the differential 5 is restrained between the two stoppers, thereby improving the stability of the connection between the driver 1 and the differential 5 and the stability of the connection between the first transmission shaft 2 and the differential 5, and avoiding the problem of relative displacement between the differential 5 and the driver 1 and between the first transmission shaft 2 and the differential 5, which may cause the differential 5 to fail.

[0105] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0106] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and intent of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A drive axle assembly, characterized in that: include: A driving member (1), a differential (5) and a first transmission shaft (2); The driving member (1) has an output shaft (6), and the differential (5) has a first end and a second end arranged opposite to each other along the axial direction of the output shaft, the output shaft (6) is in transmission connection with the first end, and the first transmission shaft (2) is in transmission connection with the second end; a stopper is respectively provided on the output shaft (6) and the first transmission shaft (2), and the stopper is used to limit the displacement of the differential (5) in the axial direction of the output shaft (6).

2. The drive axle assembly according to claim 1, characterized in that: The stop portion comprises a first stopper (3); The first stopper (3) is provided on the output shaft (6), the first stopper (3) at least partially contacts the first end to form the stop portion, and the first stopper (3) is used to limit the relative displacement between the differential (5) and the output shaft (6).

3. The drive axle assembly according to claim 2, characterized in that: The first stopper (3) is arranged around at least a portion of the circumference of the output shaft (6).

4. The drive axle assembly according to claim 3, characterized in that: A first limiting groove (7) is provided on the output shaft (6), and the first stopper (3) is at least partially connected to the first limiting groove (7).

5. The drive axle assembly according to claim 2, characterized in that: The first stopper (3) comprises an annular first stopper body, the first stopper body being sleeved on the output shaft (6), the first stopper body being in contact with the first end to limit the relative displacement between the differential (5) and the output shaft (6); and a first radial opening is provided in the first stopper body for allowing the output shaft (6) to be clamped into the first stopper body.

6. The drive axle assembly according to claim 5, characterized in that: The first stopper (3) further comprises a first adjusting portion; the first adjusting portion is arranged at the first opening, and the first adjusting portion is connected to the first stopper body and is used to adjust the size of the first opening.

7. The drive axle assembly according to claim 2, characterized in that: Along the axial direction of the output shaft (6), the orthographic projection of the first stopper (3) at least partially coincides with the orthographic projection of the first end of the differential (5).

8. The drive axle assembly according to claim 1, characterized in that: The stop portion includes a second stopper (4); The second stopper (4) is provided on the first transmission shaft (2), the second stopper (4) at least partially contacts the second end to form the stop portion, and the second stopper (4) is used to limit the relative displacement between the differential (5) and the first transmission shaft (2).

9. The drive axle assembly according to claim 8, characterized in that: The second stopper (4) is arranged around at least part of the circumference of the first transmission shaft (2).

10. The drive axle assembly according to claim 9, characterized in that: A second limiting groove (8) is provided on the first transmission shaft (2), and the second stopper (4) is at least partially connected to the second limiting groove (8).

11. The drive axle assembly according to claim 8, characterized in that: The second stopper (4) comprises an annular second stopper body (41), the second stopper body (41) being sleeved on the first transmission shaft (2), the second stopper body (41) being in contact with the first end to limit the relative displacement between the differential (5) and the first transmission shaft (2); and a radial second opening (43) is provided in the second stopper body (41) for allowing the first transmission shaft (2) to be clamped into the second stopper body (41).

12. The drive axle assembly according to claim 11, characterized in that: The second stopper (4) further comprises a second adjusting portion (42); the second adjusting portion (42) is provided at the second opening (43), and the second adjusting portion (42) is connected to the second stopper body (41) and is used to adjust the size of the second opening (43).

13. The drive axle assembly according to claim 8, characterized in that: Along the axial direction of the output shaft (6), the orthographic projection of the second stopper (4) at least partially coincides with the orthographic projection of the second end of the differential (5).

14. The drive axle assembly according to any one of claims 1 to 13, characterized in that: The first transmission shaft (2) is spline-connected with the differential (5) to form a first positioning surface (9), and the first positioning surface (9) is used to radially position the differential (5).

15. The drive axle assembly according to claim 14, characterized in that: The differential (5) includes a first side gear (511) and a housing (52); The housing (52) is in transmission connection with the output shaft (6), the housing (52) has a mounting cavity (51), the first half-shaft gear (511) is arranged in the mounting cavity (51), the first half-shaft gear (511) is in transmission connection with the housing (52), the first half-shaft gear (511) is provided with a first internal spline, the first transmission shaft (2) is provided with a first external spline, the first half-shaft gear (511) is sleeved on the first transmission shaft (2), and the first internal spline and the first external spline are engaged to form the first positioning surface (9).

16. The drive axle assembly according to claim 15, characterized in that: Also includes a second transmission shaft (20); The second transmission shaft (20) is arranged in the output shaft (6), and the second transmission shaft (20) is spline-connected with the differential (5) to form a second positioning surface (10), and the second positioning surface (10) is used to radially position the differential (5).

17. The drive axle assembly according to claim 16, characterized in that: The differential (5) includes a second side gear (512); The second side gear (512) is arranged in the mounting cavity (51) and is arranged opposite to the first side gear (511); the second side gear (512) is connected to the housing (52) in a transmission manner, a second internal spline is provided in the second side gear (512), the second transmission shaft (20) is provided with a second external spline, the second side gear (512) is sleeved on the second transmission shaft (20), and the second internal spline and the second external spline are engaged to form the second positioning surface (10).

18. The drive axle assembly according to claim 16, characterized in that: Also includes a first bearing (11); The output shaft (6) has a hollow channel, and the second transmission shaft (20) is at least partially arranged in the hollow channel; the first bearing (11) is arranged between the second transmission shaft (20) and the output shaft (6), and the second transmission shaft (20) is rotatably connected to the output shaft (6) through the first bearing (11).

19. The drive axle assembly according to claim 17, wherein: The differential (5) further includes a second bearing (55); The second bearing (55) is provided between the first side gear (511) and the housing (52); And / or, the second bearing (55) is provided between the second side gear (512) and the housing (52).

20. A vehicle, characterized in that: Comprising a drive axle assembly according to any one of claims 1-19.

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