Speed reducer assembly with differential mechanism and vehicle

Abstract

The speed reducer assembly comprises a speed reducer shell, a driving gear, the differential mechanism and a rotary supporting piece, the differential mechanism comprises a differential mechanism half shell, the driving gear is rotationally connected to the speed reducer shell, and the driving gear is fixedly connected with the differential mechanism half shell; the differential half shells are driven to rotate through rotation of the driving gears; the differential mechanism half shells are provided with annular supporting faces, and the supporting faces are located at the ends, in the axial direction, of the differential mechanism half shells. The speed reducer shell is provided with supporting matching faces, and the rotary supporting piece is clamped between the supporting faces and the supporting matching faces so that the supporting faces of the speed reducer shell can be supported on the supporting matching faces of the speed reducer shell. According to the scheme, only one half shell of the differential shell is reserved, the other half shell is omitted, the half shell of the differential is directly supported on the speed reducer shell through the supporting face on the half shell of the differential, and therefore the weight of the whole shell of the differential is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of automobile parts, and in particular to a speed reducer assembly with a differential and a vehicle. Background Art

[0002] The differential is the main component of the vehicle's electric drive. Its function is to transmit power to the half-axles on both sides while allowing the half-axles on both sides to rotate at different speeds when the car turns, so that the wheels on both sides can travel at unequal distances in a pure rolling form as much as possible, reducing the friction between the tires and the ground. When the car turns, the wheel line is an arc. For example, when the car turns left, the center point of the arc is on the left. In the same time, the arc of the right wheel is longer than that of the left wheel. In order to balance this difference, the left wheel must be slower and the right wheel must be faster, using different speeds to make up for the distance difference.

[0003] The power of the engine enters the differential through the drive shaft, directly driving the differential housing to rotate, and then the planetary gear drives the left and right half shafts to drive the left and right wheels respectively. When the car is moving straight, the rotation speeds of the left and right wheels and the differential housing are equal and in a balanced state, but when the car turns, the balance state of the three is destroyed, resulting in a decrease in the speed of the inner wheel and an increase in the speed of the outer wheel.

[0004] The current differential housing generally includes two half shells, which together constitute the entire housing structure of the differential. The half-shaft gears and planetary gears are all installed inside the differential housing. However, the differential housing of this structure is heavy and costly, and still needs to be optimized. Summary of the invention

[0005] The present application provides a speed reducer assembly with a differential and a vehicle to solve the problem of heavy weight and high cost of a differential housing.

[0006] In order to solve the above technical problems, the first technical solution provided in the present application is: a reducer assembly with a differential, including a reducer housing, a driving gear, a differential and a rotating support, the differential including a differential half shell, the driving gear is rotatably connected to the reducer housing, and the driving gear is fixedly connected to the differential half shell to drive the differential half shell to rotate through the rotation of the driving gear; the differential half shell has an annular support surface, the support surface is located at one end of the differential half shell in the axial direction, the support surface is arranged along the circumference of the differential half shell, and the support surface intersects with the axial direction of the differential half shell; the reducer housing has a supporting mating surface, along the axial direction of the differential half shell, the supporting surface and the supporting mating surface are arranged opposite to each other, and the rotating support is clamped between the supporting surface and the supporting mating surface, the supporting surface can be rotated along the circumference of the differential half shell itself through the rotating support relative to the supporting mating surface, so as to support the supporting surface of the reducer housing on the supporting mating surface of the reducer housing.

[0007] According to one embodiment of the present application, the drive gear and the differential half shell are integrally formed.

[0008] According to an embodiment of the present application, the supporting surface and the supporting mating surface are both perpendicular to the axial direction of the differential half-shell.

[0009] According to one embodiment of the present application, the rotating support member includes a retaining frame and a plurality of rolling bodies rotatably connected to the retaining frame. The retaining frame is an annular plate structure, and a plurality of mounting holes are provided on the retaining frame that penetrate the retaining frame in the thickness direction. The plurality of mounting holes are arranged at intervals along the circumference of the retaining frame, and the rolling bodies are installed in each mounting hole one by one, and the rolling bodies can rotate around their own axes relative to the retaining frame.

[0010] According to an embodiment of the present application, the rolling element is cylindrical and extends in the radial direction of the retaining frame.

[0011] According to one embodiment of the present application, the differential further includes a half-shaft gear, a planetary shaft and a planetary gear; the half-shaft gear includes a gear portion and a sleeve portion, there are two half-shaft gears, and the two half-shaft gears are respectively a first half-shaft gear and a second half-shaft gear; the planetary shaft is fixed in the differential half shell, the planetary gear is rotatably sleeved on the planetary shaft, and the planetary gear is meshed with the gear portion of the half-shaft gear; a mounting cavity is provided in the differential half shell, and a mounting opening communicating with the mounting cavity is opened at one end of the differential half shell in the axial direction, and the planetary shaft and the planetary gear are inserted into the mounting cavity through the mounting opening; the differential half shell has a support cylinder at one end away from the support surface in the axial direction, and the support cylinder is sleeved on the sleeve portion of the first half-shaft gear, and the reducer housing includes a first side wall and a second side wall arranged oppositely, the support cylinder and the sleeve portion of the first half-shaft gear are jointly penetrated in the first side wall of the reducer housing, and the support cylinder is rotatably connected to the first side wall through a first bearing, and the sleeve portion of the second half-shaft gear is penetrated in the second side wall of the reducer housing and is rotatably connected to the second side wall through a second bearing, and the sleeve portion of the second half-shaft gear is penetrated in the second side wall of the reducer housing and is rotatably connected to the second side wall through a second bearing.

[0012] According to one embodiment of the present application, the gear portion of the second half-shaft gear has a second half-shaft gear end face facing the second side wall, the outer ring of the second bearing abuts against the second side wall, and the inner ring of the second bearing abuts against the gear portion end face of the second half-shaft gear, so as to press the second half-shaft gear onto the planetary gear in the axial direction of the differential half shell, and then press the planetary shaft into the differential half shell, so as to achieve relative fixation between the planetary shaft and the differential half shell.

[0013] According to one embodiment of the present application, the inner wall of the differential half shell is provided with two mounting parts protruding toward the mounting cavity, and each mounting part is provided with a slot, the slot is connected to the mounting cavity, and the opening of the slot is axially directed toward the mounting opening of the differential half shell; the two ends of the planetary shaft are respectively inserted into the slots on the two mounting parts.

[0014] According to one embodiment of the present application, the outer wall of the planetary shaft is provided with a first anti-rotation surface, and the groove wall of the slot is provided with a second anti-rotation surface. Through the shape matching of the first anti-rotation surface and the second anti-rotation surface, the rotation of the planetary shaft relative to the slot along the circumference of the planetary shaft itself is limited.

[0015] In order to solve the above technical problems, the second technical solution provided in the present application is: a vehicle, comprising a reducer assembly with a differential of the above solution.

[0016] The beneficial effects of this application are:

[0017] The present application provides a reducer assembly with a differential and a vehicle having the reducer assembly with a differential. The reducer assembly includes a reducer housing, a drive gear, a differential and a rotating support. In the related art, the housing structure of the differential is mostly two half shells, and the two half shells together constitute the entire housing structure. The two half shells are respectively supported on the reducer housing and are heavy. The present application only retains one of the half shells (differential half shell) of the differential housing and cancels the other half shell. The differential half shell is directly supported on the reducer housing through the supporting surface thereon, thereby reducing the weight of the entire differential housing. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work, among which:

[0019] Figure 1 is a cross-sectional schematic diagram of a speed reducer assembly with a differential provided by the present application;

[0020] Figure 2 yes Figure 1 A schematic diagram of the three-dimensional structure of a differential half shell and a driving gear in a reducer assembly;

[0021] Figure 3 yes Figure 2 A schematic diagram of the structure of the differential half shell and the drive gear from another perspective;

[0022] Figure 4 yes Figure 1 A schematic diagram of the three-dimensional structure of an embodiment of a rotating support member in a reducer assembly;

[0023] Figure 5 yes Figure 1 A schematic diagram of the three-dimensional structure of a second side wall in a reducer housing of a reducer assembly;

[0024] Figure 6 yes Figure 1 A schematic diagram of the three-dimensional structure of the planetary shaft in the reducer assembly;

[0025] Figure 7 yes Figure 1 Front view of the planetary shaft in the reducer assembly.

[0026] Description of reference numerals:

[0027] Reducer assembly 100

[0028] Reducer housing 110

[0029] Support mating surface 1100

[0030] The first side wall 111

[0031] The second side wall 112

[0032] Drive gear 120

[0033] Differential 130

[0034] Differential half housing 131

[0035] Support surface 1310

[0036] Mounting cavity 1311

[0037] Installation section 1312

[0038] Card slot 1313

[0039] Second anti-rotation surface 1314

[0040] Support tube 1315

[0041] Planetary gear 132

[0042] Planetary gasket 1321

[0043] Planetary shaft 133

[0044] Axle gear 134

[0045] Gear 1341

[0046] Sleeve part 1342

[0047] First side gear 134A

[0048] Second side gear 134B

[0049] The first anti-rotation surface 1331

[0050] Rotating support 140

[0051] Cage 141

[0052] Mounting hole 1410

[0053] Rolling element 142

[0054] First bearing 150

[0055] Second bearing 160

[0056] Axial R DETAILED DESCRIPTION

[0057] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0058] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0059] The present application provides a speed reducer assembly with a differential. In one embodiment, referring to Figure 1 , Figure 1 1 is a schematic cross-sectional view of a reducer assembly with a differential provided in the present application. The reducer assembly 100 with a differential includes a reducer housing 110 , a drive gear 120 , a differential 130 and a rotating support 140 .

[0060] The differential 130 includes a differential half shell 131, and the drive gear 120 is rotatably connected to the reducer housing 110, and the drive gear 120 is fixedly connected to the differential half shell 131, so that the rotation of the drive gear 120 drives the differential half shell 131 to rotate. Figure 2 and Figure 3 , Figure 2 yes Figure 1 A schematic diagram of the three-dimensional structure of the differential half shell 131 and the driving gear 120 in the reducer assembly 100, Figure 3 yes Figure 2 A schematic diagram of the structure of the differential half shell 131 and the drive gear 120 from another perspective, Figures 1 to 3The driving gear 120 and the differential half shell 131 are shown to be integrally formed. The driving gear 120 and the differential half shell 131 can also be separately arranged, and the driving gear 120 and the differential half shell 131 are fixedly connected by bolt fasteners to achieve power transmission between the driving gear 120 and the differential half shell 131.

[0061] The differential half shell 131 has an annular support surface 1310, which is located at one end of the differential half shell 131 in the axial direction R, and is arranged along the circumferential direction of the differential half shell 131, and the support surface 1310 intersects with the axial direction R of the differential half shell 131. The meaning of the support surface 1310 intersecting with the axial direction R of the differential half shell 131 is that the support surface 1310 is not parallel to the axial direction R of the differential half shell 131, and the two can be perpendicular to each other or form an acute angle. When the support surface 1310 and the differential half shell 131 are perpendicular to each other, the support surface 1310 is a plane perpendicular to the axial direction R of the differential half shell 131, and when the support surface 1310 and the differential half shell 131 form an acute angle, the support surface 1310 is a conical surface surrounding the central axis of the differential half shell 131.

[0062] The reducer housing 110 has a support mating surface 1100. Along the axial direction R of the differential half shell 131, the support surface 1310 is arranged opposite to the support mating surface 1100, and the rotating support member 140 is clamped between the support surface 1310 and the support mating surface 1100. The support surface 1310 can rotate relative to the support mating surface 1100 along the circumference of the differential half shell 131 itself through the rotating support member 140 to support the support surface 1310 of the differential half shell 131 on the support mating surface 1100 of the reducer housing 110.

[0063] In the related art, the housing structure of the differential 130 is mostly composed of two half shells, which together constitute the entire housing structure. The two half shells are respectively supported on the reducer housing 110 and are heavy. The present application only retains one of the half shells (differential half shell 131) of the housing of the differential 130 and cancels the other half shell. The differential half shell 131 is directly supported on the reducer housing 110 through the support surface 1310 thereon, thereby reducing the weight of the entire housing of the differential 130 and reducing costs.

[0064] It should be noted that the driving gear 120 in the present application refers to the last stage reduction gear of the reduction gear set in the reducer assembly 100. Figure 1 Only the last stage reduction gear is shown, and other reduction gears are omitted. The power output from the vehicle's drive motor or engine is transmitted to the reduction gear set in the reducer assembly 100, and the power is transmitted to the differential half shell 131 through multiple stages of reduction.

[0065] In some embodiments, the support surface 1310 and the support mating surface 1100 are both perpendicular to the axial direction R of the differential half-shell 131. In this way, the support surface 1310 and the support mating surface 1100 are both planes perpendicular to the axial direction R of the differential half-shell 131, and the structures of the support surface 1310 and the support mating surface 1100 are simpler, and it is also convenient to install the rotating support member 140 between the support surface 1310 and the support mating surface 1100.

[0066] It should also be noted that, when the drive gear 120 and the differential half shell 131 are integrally arranged, the support surface 1310 can be arranged only on the end surface of the differential half shell 131, or can be arranged on the end surface of the drive gear 120 and the end surface of the differential half shell 131 at the same time, that is, it is arranged on the end surface of the integral structure formed by the drive gear 120 and the differential half shell 131.

[0067] See also Figure 4 , Figure 4 yes Figure 1 A schematic diagram of the three-dimensional structure of an embodiment of a rotating support member 140 in a reducer assembly 100. In some embodiments, the rotating support member 140 includes a retaining frame 141 and a plurality of rolling bodies 142 rotatably connected to the retaining frame 141. The retaining frame 141 is an annular plate structure. The retaining frame 141 is provided with a plurality of mounting holes 1410 extending through the thickness direction thereof. The plurality of mounting holes 1410 are arranged at intervals along the circumference of the retaining frame 141. The plurality of rolling bodies 142 are mounted in the plurality of mounting holes 1410 one by one, and the rolling bodies 142 can rotate in the mounting holes 1410 relative to the retaining frame 141 around the axis of the rolling body 142 itself.

[0068] The retainer 141 can be fixed on the reducer housing 110, and in the thickness direction of the retainer 141, the side of the rolling element 142 facing the support surface 1310 protrudes from the plate surface of the retainer 141 facing the support surface 1310, so that the rolling element 142 contacts the support surface 1310, and the rolling element 142 does not contact the support mating surface 1100, so when the differential half shell 131 rotates relative to the reducer housing 110, the retainer 141 can be fixed, and the support surface 1310 on the differential half shell 131 drives the rolling element 142 to rotate, and the rolling element 142 only has self-rotation, and rolling friction occurs between the rolling element 142 and the support surface 1310. With such a configuration, the support surface 1310 can drive the rolling element 142 to rotate to realize the rotation of the support surface 1310 relative to the reducer housing 110.

[0069] The retaining frame 141 can also be fixed on the differential half shell 131. In the thickness direction of the retaining frame 141, the side of the rolling body 142 facing the support mating surface 1100 protrudes out of the plate surface of the retaining frame 141 facing the support mating surface 1100, so that the rolling body 142 is in contact with the support mating surface 1100, and the rolling body 142 is not in contact with the support surface 1310. Therefore, when the differential half shell 131 rotates relative to the reducer housing 110, the differential half shell 131 drives the retaining frame 141 and each rolling body 142 on the retaining frame 141 to rotate together. While the rolling body 142 revolves around the central axis of the differential half shell 131, the rolling body 142 can also rotate by itself through the cooperation between the rolling body 142 and the support mating surface 1100, and rolling friction occurs between the rolling body 142 and the support mating surface 1100. With such configuration, the rolling element 142 can not only revolve around the central axis of the differential half-shell 131 , but also rotate on its own axis, thereby realizing the rotation of the supporting surface 1310 relative to the reducer housing 110 .

[0070] Specifically, the rolling body 142 is cylindrical and extends along the radial direction of the retaining frame 141. Correspondingly, the mounting hole 1410 is a rectangular hole. In other embodiments, the rolling body 142 may also be a spherical or elliptical body of revolution. It is understood that the rolling body 142 is cylindrical, and the contact area between it and the support surface 1310 or between it and the support mating surface 1100 is larger.

[0071] Furthermore, the rolling body 142 can be supported in the mounting hole 1410 by a support shaft. The support shaft is coaxially arranged with the rolling body 142 . The support shaft is used to support the rolling body 142 to achieve relative rotation of the rolling body 142 in the mounting hole 1410 .

[0072] See again Figure 1 The differential 130 further includes a half shaft gear 134 , a planetary shaft 133 and a planetary gear 132 .

[0073] The side gear 134 includes a gear portion 1341 and a sleeve portion 1342. The gear portion 1341 and the sleeve portion 1342 are coaxially fixed. Further, the gear portion 1341 and the sleeve portion 1342 can be integrally formed. There are two side gears 134, which are arranged along the axial direction R of the differential half shell 131. The two side gears 134 are respectively a first side gear 134A and a second side gear 134B.

[0074] The planetary shaft 133 is fixed in the differential half shell 131, and the planetary gear 132 is rotatably sleeved on the planetary shaft 133, and the planetary gear 132 is meshed with the gear portion 1341 of the half-shaft gear 134. There are also two planetary gears 132, and the two planetary gears 132 are respectively meshed with the gear portion 1341 of the first half-shaft gear 134A and the gear portion 1341 of the second half-shaft gear 134B, and the axes of the two planetary gears 132 are perpendicular to the axes of the two half-shaft gears 134.

[0075] The following Figure 1 The structure shown is a simple description of the basic principle of the differential 130.

[0076] The power output from the vehicle's drive motor or engine is first transmitted to the drive gear 120. The rotation of the drive gear 120 drives the differential half shell 131 fixed thereto to rotate. The power is transmitted from the differential half shell 131 to the left and right half shafts through the half shaft gear 134. When the differential half shell 131 rotates, it drives the planetary gear 132 to revolve around the central axis of the differential half shell 131.

[0077] When the vehicle is traveling in a straight line, the resistances on the left and right wheels are substantially the same, and the planetary gears 132 in the differential half-shell 131 revolve along with the differential half-shell 131 without generating any rotation.

[0078] When the vehicle turns, the left and right wheels travel different distances and encounter different resistances. The planetary gear 132 in the differential half shell 131 rotates along with the differential half shell 131 to transfer more torque to the side axle gear 134 on the side of the wheel with a longer travel distance. Due to the revolution of the planetary gear 132 and its own rotation, the left and right side axle gears 134 rotate at different speeds, allowing the vehicle to turn smoothly.

[0079] The matching structure of the planetary gear 132 and the half-shaft gear 134 relative to the differential half shell 131 and the reducer housing 110 is described in detail below.

[0080] Combined Figure 1 and Figure 3 A mounting cavity 1311 is provided in the differential half shell 131. The mounting cavity 1311 refers to the space defined by the inner wall of the differential half shell 131. An mounting opening connected to the mounting cavity 1311 is opened at one end of the differential half shell 131 in the axial direction R. The planetary shaft 133 and the planetary gear 132 penetrate into the mounting cavity 1311 through the mounting opening. The mounting opening refers to the opening area on the radial inner side of the annular support surface 1310.

[0081] The differential half shell 131 has a support cylinder 1315 at one end away from the support surface 1310 in the axial direction R. The support cylinder 1315 is sleeved on the sleeve portion 1342 of the first half-shaft gear 134A. The reducer housing 110 includes a first side wall 111 and a second side wall 112 that are oppositely arranged. Figure 5 , Figure 5 yes Figure 1 The schematic diagram of the three-dimensional structure of the second side wall 112 in the reducer housing 110 of the reducer assembly 100 is shown in FIG. 1 , and the supporting mating surface 1100 is arranged on the side of the second side wall 112 facing the first side wall 111. It should be noted that, Figure 1 The middle rectangular dotted frame refers to the reducer housing 110 , which is only a schematic diagram, and the actual shape of the reducer housing 110 is specifically set according to needs.

[0082] The support cylinder 1315 and the sleeve portion 1342 of the first half-shaft gear 134A are jointly penetrated through the first side wall 111 of the reducer housing 110, and the support cylinder 1315 is rotatably connected to the first side wall 111 through a first bearing, and the sleeve portion 1342 of the second half-shaft gear 134B is penetrated through the second side wall 112 of the reducer housing 110 and is rotatably connected to the second side wall 112 through a second bearing 160.

[0083] The differential half shell 131 is limited and supported in the axial direction R and radial direction through the first bearing 150 and the rotating support member 140. Specifically:

[0084] In the axial direction R of the differential 130 housing, the differential half shell 131 is stably supported on the reducer housing 110 through the first bearing 150 and the rotating support 140. Specifically, the outer ring of the first bearing 150 abuts against the first side wall 111 in the axial direction R of the differential 130 housing, and the inner ring of the first bearing 150 abuts against the outer surface of the differential half shell 131 in the axial direction R of the differential 130 housing, so that the differential half shell 131 is clamped between the first side wall 111 and the second side wall 112 in its axial direction R, thereby realizing the limitation and support of the differential half shell 131 in the axial direction R.

[0085] In the radial direction of the differential 130 housing, the support cylinder 1315 of the differential half shell 131 realizes radial limitation and support of the differential 130 housing through the first bearing 150 .

[0086] In one embodiment, the gear portion 1341 of the second half-shaft gear 134B has a second half-shaft gear end face facing the second side wall 112, the outer ring of the second bearing 160 abuts against the second side wall 112, and the inner ring of the second bearing 160 abuts against the second half-shaft gear end face, so as to press the second half-shaft gear 134B onto the planetary gear 132 in the axial direction R of the differential half shell 131, and then press the planetary shaft 133 into the differential half shell 131, so as to achieve relative fixation between the planetary shaft 133 and the differential half shell 131.

[0087] In this embodiment, the gear portion 1341 of the second side gear 134B is pressed against the planetary gear 132, thereby pressing the planetary shaft 133 into the clamping groove 1313 in the differential half shell 131. The gear portion 1341 of the second side gear 134B indirectly supports the planetary shaft 133, thereby limiting the position of the planetary shaft 133 in the axial direction R of the differential half shell 131. In the related art, the planetary shaft 133 is fixed in the differential 130 by fasteners such as bolts penetrating from the differential housing into the planetary shaft 133 in a direction perpendicular to the axis of the planetary shaft 133, thereby fixing the planetary shaft 133 relative to the differential housing. However, in this embodiment, the planetary shaft 133 can be fixed relative to the differential half shell 131 without fasteners.

[0088] See again Figure 3 In one embodiment, the inner wall of the differential half shell 131 is provided with two mounting parts 1312 protruding toward the mounting cavity 1311, and the mounting parts 1312 are provided with a slot 1313, the slot 1313 is communicated with the mounting cavity 1311, and the opening of the slot 1313 faces the mounting opening in the axial direction R of the differential half shell 131, and the two ends of the planetary shaft 133 are respectively inserted into the slots 1313 on the two mounting parts 1312. In this embodiment, the planetary shaft 133 is fixed relative to the differential half shell 131 by providing the mounting part 1312 on the differential half shell 131, avoiding the situation that the strength of the differential half shell 131 is too low due to directly slotting the end surface of the differential half shell 131 to accommodate the end of the planetary shaft 133.

[0089] See also Figure 6 and Figure 7 , Figure 6 yes Figure 1 A schematic diagram of the three-dimensional structure of the planetary shaft 133 in the reducer assembly 100, Figure 7 yes Figure 1The front view of the planetary shaft 133 in the reducer assembly 100, in one embodiment, the outer wall of the planetary shaft 133 is provided with a first anti-rotation surface 1331, and the groove wall of the slot 1313 is provided with a second anti-rotation surface 1314, and the first anti-rotation surface 1331 and the second anti-rotation surface 1314 are matched with each other in the shape, so as to limit the rotation of the planetary shaft 133 relative to the slot 1313 along the circumference of the planetary shaft 133 itself. Specifically, the first anti-rotation surface 1331 and the second anti-rotation surface 1314 are both planes. In this embodiment, the two ends of the planetary shaft 133 are respectively mounted to the two mounting parts 1312, and the anti-rotation cooperation between the planetary shaft 133 and the mounting part 1312 makes the second half-shaft gear 134B pressed against the planetary gear 132, that is, the relative fixation of the planetary shaft 133 and the mounting part 1312 is realized, so as to facilitate the rotation of the planetary gear 132 on the planetary shaft 133 and prevent the planetary shaft 133 from rotating with the planetary gear 132.

[0090] Since the planetary shaft 133 is inserted into the slot 1313 through the opening of the slot 1313, in order to make the first anti-rotation surface 1331 and the second anti-rotation surface 1314 fit better after the planetary shaft 133 is inserted into the slot 1313, so as to achieve a better relative fixing effect between the planetary shaft 133 and the mounting portion 1312, there are two second anti-rotation surfaces 1314 on the mounting portion 1312, and the two second anti-rotation surfaces 1314 are parallel to each other. The two second anti-rotation surfaces 1314 on the mounting portion 1312 are the two opposite groove walls of the slot 1313. Correspondingly, there are also two first anti-rotation surfaces 1331 at the end of the planetary shaft 133, and the two first anti-rotation surfaces 1331 are arranged back to back and parallel to each other in the radial direction of the planetary shaft 133. With such arrangement, when the two ends of the planetary shaft 133 are respectively inserted into the two slots 1313 through the openings of the two slots 1313, the two mutually parallel first anti-rotation surfaces 1331 at the end of the planetary shaft 133 can respectively slide into the slot 1313 along the two second anti-rotation surfaces 1314 on the mounting portion 1312, thereby making the end of the planetary shaft 133 fit tightly against the slot wall of the slot 1313.

[0091] In addition, since the support surface 1310 on the differential half shell 131 needs to be supported on the support mating surface 1100 on the reducer housing 110, in order to avoid the installation portion 1312 interfering with the fit between the support surface 1310 and the support mating surface 1100, the installation portion 1312 should not protrude from the support surface 1310 in the axial direction R of the differential half shell 131. For example, the surface of the installation portion 1312 in the axial direction R of the differential half shell 131 is flush with the support surface 1310, or the surface of the installation portion 1312 in the axial direction R of the differential half shell 131 is recessed relative to the support surface 1310.

[0092] In one embodiment, in order to achieve lubrication when the planetary gear 132 and the differential half shell 131 rotate relative to each other, the differential 130 further includes a planetary gasket 1321 sleeved on the planetary shaft 133. The planetary gasket 1321 is partially spherical in shape. The concave surface of the planetary gasket 1321 fits with the axial end surface of the planetary gear 132. Correspondingly, the axial R end surface of the planetary gear 132 facing the concave surface of the planetary gasket 1321 is a convex surface. The convex surface of the planetary gasket 1321 fits with the inner wall of the differential half shell 131, specifically, it fits with the surface of the mounting portion 1312 facing the planetary gear 132. Correspondingly, the surface of the mounting portion 1312 facing the convex surface of the planetary gasket 1321 is a concave surface. In this embodiment, since there are two planetary gears 132 and two mounting portions 1312, there are also two planetary gaskets 1321, and one planetary gasket 1321 corresponds to one planetary gasket 1321.

[0093] The present application also provides a vehicle, which includes the above-mentioned speed reducer assembly 100 with a differential. The specific structure of the speed reducer assembly 100 with a differential refers to the above-mentioned embodiment. Since the present vehicle adopts all the technical solutions of the above-mentioned embodiment, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiment, which will not be described one by one here.

[0094] The terms "first", "second" and "third" in this application are only used for descriptive purposes and should not be understood as indicating the number of indicated technical features. Thus, the features defined as "first", "second" and "third" may explicitly or implicitly include at least one of the features. All directional indications (such as up, down, left, right, front, back...) in the embodiments of the present application are only used to explain the relative positional relationship, movement, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication also changes accordingly. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions.

[0095] The above descriptions are merely embodiments of the present application and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A speed reducer assembly with a differential, characterized in that: The invention comprises a reducer housing, a driving gear, a differential and a rotating support, wherein the differential comprises a differential half-shell, the driving gear is rotatably connected to the reducer housing, and the driving gear is fixedly connected to the differential half-shell, so that the differential half-shell is driven to rotate by the rotation of the driving gear; The differential half shell has an annular support surface, the support surface is located at one end of the differential half shell in the axial direction, the support surface is arranged along the circumference of the differential half shell, and the support surface intersects with the axial direction of the differential half shell; The reducer housing has a support mating surface, and along the axial direction of the differential half-shell, the support surface is arranged opposite to the support mating surface, and the rotating support member is clamped between the support surface and the support mating surface. The support surface can rotate relative to the support mating surface along the circumference of the differential half-shell itself through the rotating support member to support the support surface of the reducer housing on the support mating surface of the reducer housing.

2. The speed reducer assembly with differential according to claim 1, characterized in that: The drive gear is integrally formed with the differential half-shell.

3. The speed reducer assembly with differential according to claim 1, characterized in that: The supporting surface and the supporting mating surface are both perpendicular to the axial direction of the differential half-shell.

4. The speed reducer assembly with differential according to claim 3, characterized in that: The rotating support member includes a retaining frame and a plurality of rolling bodies rotatably connected to the retaining frame. The retaining frame is an annular plate structure. The retaining frame is provided with a plurality of mounting holes that penetrate through the thickness direction thereof. The plurality of mounting holes are arranged at intervals along the circumference of the retaining frame. The rolling bodies are mounted in the mounting holes one by one, and the rolling bodies can rotate around their own axes relative to the retaining frame.

5. The speed reducer assembly with differential according to claim 4, characterized in that: The rolling element is cylindrical and extends along the radial direction of the retaining frame.

6. The speed reducer assembly with differential according to claim 1, characterized in that: The differential also includes axle gears, planetary shafts and planetary gears; The side shaft gear comprises a gear portion and a sleeve portion, and there are two side shaft gears, and the two side shaft gears are respectively a first side shaft gear and a second side shaft gear; The planetary shaft is fixed in the differential half shell, the planetary gear is rotatably sleeved on the planetary shaft, and the planetary gear is meshed with the gear portion of the half-shaft gear; A mounting cavity is provided in the differential half shell, and a mounting opening communicating with the mounting cavity is provided at one axial end of the differential half shell, and the planetary shaft and the planetary gear penetrate into the mounting cavity through the mounting opening; The differential half shell has a support cylinder at one end axially away from the support surface, and the support cylinder is sleeved on the sleeve portion of the first half-shaft gear. The reducer housing includes a first side wall and a second side wall that are opposite to each other. The support cylinder and the sleeve portion of the first half-shaft gear are jointly penetrated through the first side wall of the reducer housing, and the support cylinder is rotatably connected to the first side wall through a first bearing. The sleeve portion of the second half-shaft gear is penetrated through the second side wall of the reducer housing and is rotatably connected to the second side wall through a second bearing.

7. The speed reducer assembly with a differential according to claim 6, characterized in that: The gear portion of the second half-shaft gear has a second half-shaft gear end face facing the second side wall, the bearing outer ring of the second bearing abuts against the second side wall, and the bearing inner ring of the second bearing abuts against the gear portion end face of the second half-shaft gear, so that the second half-shaft gear is pressed against the planetary gear in the axial direction of the differential half shell, and then the planetary shaft is pressed into the differential half shell, so as to achieve relative fixation between the planetary shaft and the differential half shell.

8. The speed reducer assembly with a differential according to claim 6 or 7, characterized in that: The inner wall of the differential half-shell is provided with two mounting parts protruding toward the mounting cavity, and each mounting part is provided with a slot, the slot is communicated with the mounting cavity, and the opening of the slot is axially facing the mounting opening of the differential half-shell; The two ends of the planetary shaft are respectively inserted into the slots on the two mounting parts.

9. The speed reducer assembly with a differential according to claim 8, characterized in that: The outer wall of the planetary shaft is provided with a first anti-rotation surface, and the groove wall of the slot is provided with a second anti-rotation surface. Through the shape matching of the first anti-rotation surface and the second anti-rotation surface, the rotation of the planetary shaft relative to the slot along the circumference of the planetary shaft itself is limited.

10. A vehicle, characterized in that: A speed reducer assembly with a differential comprising any one of claims 1 to 9.

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