Reduction gear assembly with differential and vehicle

Abstract

The application discloses a reducer assembly with a differential and a vehicle. The reducer assembly comprises a reducer housing, a driving gear, a differential and a rotating support. The differential comprises a differential half housing. The driving gear is rotationally connected to the reducer housing and fixedly connected with the differential half housing, so as to drive the differential half housing to rotate through the rotation of the driving gear. The differential half housing has a ring-shaped support surface located at one end in the axial direction of the differential half housing. The reducer housing has a support matching surface. The rotating support is clamped between the support surface and the support matching surface, so as to support the support surface of the reducer housing on the support matching surface of the reducer housing. According to the above scheme, only one half housing of the differential housing is reserved, and the other half housing is cancelled. The differential half housing is directly supported on the reducer housing through the support surface thereon, so that the weight of the overall differential housing is reduced.

Description

TECHNICAL FIELD

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

[0002] The differential is a main component of the electric drive of a vehicle, which functions to allow the two half shafts to rotate at different speeds while transmitting power to the two half shafts, so as to enable the two wheels to travel at different distances as much as possible in the form of pure rolling, thereby reducing the friction between the tires and the ground. When the vehicle turns, the wheel line of the vehicle is a circular arc. For example, when the vehicle turns to the left, the center point of the circular arc is on the left side. In the same time, the arc line of the right wheel is longer than that of the left wheel. In order to balance the difference, the left wheel needs to rotate slower and the right wheel needs to rotate faster, so as to make up for the difference in distance by rotating at different speeds.

[0003] The power of the engine enters the differential through the transmission shaft, directly drives the differential housing to rotate, and then drives the left and right half shafts through the planetary gears, so as to drive the left and right wheels. When the vehicle travels straight, the rotation speeds of the left and right wheels and the differential housing are equal and balanced. When the vehicle turns, the balance is destroyed, resulting in a decrease in the rotation speed of the inner wheel and an increase in the rotation speed of the outer wheel.

[0004] At present, the differential housing generally comprises two half housings, which together constitute the entire housing structure of the differential. The half shaft gears and the planetary gears are both installed inside the housing of the differential. However, the differential housing of this structure is heavy and high in cost, and still needs to be optimized. SUMMARY

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

[0006] To solve the above technical problems, the first technical solution provided by the present application is a reducer assembly with a differential, which comprises a reducer housing, a driving gear, a differential, and a rotating support. The differential comprises a differential half housing. The driving gear is rotationally connected to the reducer housing and fixedly connected with the differential half housing, so as to drive the differential half housing to rotate through the rotation of the driving gear. The differential half housing has a ring-shaped support surface located at one end in the axial direction of the differential half housing. The support surface is arranged along the circumferential direction of the differential half housing and intersects with the axial direction of the differential half housing. The reducer housing has a support matching surface. The support surface and the support matching surface are oppositely arranged along the axial direction of the differential half housing. The rotating support is clamped between the support surface and the support matching surface. The support surface can rotate relative to the support matching surface along the circumferential direction of the differential half housing through the rotating support, so as to support the support surface of the reducer housing on the support matching surface of the reducer housing.

[0007] According to an embodiment of the present application, the driving gear is integrally formed with the differential half housing.

[0008] According to an embodiment of the present application, the support surface and the support matching surface are both perpendicular to the axial direction of the differential half housing.

[0009] According to an embodiment of the present application, the rotating support member comprises a retainer and a plurality of rolling bodies rotatably connected to the retainer, the retainer is in the form of a ring-shaped plate body structure, a plurality of mounting holes penetrating through the thickness direction of the retainer are formed on the retainer, the mounting holes are arranged in the circumferential direction of the retainer, each rolling body is installed in each mounting hole one by one, and the rolling body can rotate around its own axis relative to the retainer.

[0010] According to an embodiment of the present application, the rolling body is in the form of a cylinder and extends in the radial direction of the retainer.

[0011] According to an embodiment of the present application, the differential further comprises half shaft gears, a planet shaft and a planet gear; the half shaft gears comprise gear portions and sleeve portions, and there are two half shaft gears, which are a first half shaft gear and a second half shaft gear; the planet shaft is fixed in the differential half housing, the planet gear is rotatably sleeved on the planet shaft, and the planet gear is engaged with the gear portions of the half shaft gears; the differential half housing is provided with a mounting cavity, an installation opening communicating with the mounting cavity is formed at one end of the differential half housing in the axial direction, and the planet shaft and the planet gear penetrate into the mounting cavity through the installation opening; the end of the differential half housing away from the support surface in the axial direction is provided with a support cylinder, the support cylinder is sleeved on the sleeve portion of the first half shaft gear, the reducer housing comprises first and second side walls arranged oppositely, 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 rotatably connected to the second side wall through a second bearing.

[0012] According to an 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 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 end face of the gear portion of the second half shaft gear, so as to press the second half shaft gear against the planet gear in the axial direction of the differential half housing, and further press the planet shaft against the differential half housing, thereby achieving the relative fixation between the planet shaft and the differential half housing.

[0013] According to an embodiment of the present application, the inner wall of the differential half housing is provided with two mounting portions protruding towards the mounting cavity, a clamping groove is formed on each mounting portion, the clamping groove communicates with the mounting cavity, and the opening of the clamping groove faces the installation opening in the axial direction of the differential half housing; the two ends of the planet shaft are respectively inserted into the clamping grooves on the two mounting portions.

[0014] According to an embodiment of the present application, the outer side wall of the planet shaft is provided with a first anti-rotation surface, and the slot wall of the clamping groove is provided with a second anti-rotation surface. The first anti-rotation surface and the second anti-rotation surface are matched in shape to limit the rotation of the planet shaft relative to the clamping groove along the circumferential direction of the planet shaft.

[0015] To solve the above technical problems, a second technical solution provided by the present application is a vehicle comprising the differential-equipped speed reducer assembly.

[0016] The present application has the following beneficial effects:

[0017] The differential-equipped speed reducer assembly and the vehicle provided by the present application have the following beneficial effects: BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative effort, and the drawings include:

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

[0020] Figure 2 is a perspective view of the differential-equipped speed reducer assembly of Figure 1 ;

[0021] Figure 3 is another perspective view of the differential-equipped speed reducer assembly of Figure 2 ;

[0022] Figure 4 is a perspective view of an embodiment of the rotating support in the differential-equipped speed reducer assembly of Figure 1 ;

[0023] Figure 5 is a perspective view of the second side wall in the speed reducer housing of the differential-equipped speed reducer assembly of Figure 1 ;

[0024] Figure 6 isFigure 1 A perspective view of a planetary shaft in a reducer assembly of

[0025] Figure 7 A perspective view of a planetary shaft in a reducer assembly of Figure 1

[0026] BRIEF DESCRIPTION OF DRAWINGS

[0027] Reducer assembly 100

[0028] Reducer housing 110

[0029] Support mating surface 1100

[0030] First side wall 111

[0031] 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] Mounting portion 1312

[0038] Clamping slot 1313

[0039] Second anti-rotation surface 1314

[0040] Support cylinder 1315

[0041] Planetary gear 132

[0042] Planetary washer 1321

[0043] Planetary shaft 133

[0044] Half axle gear 134

[0045] Gear portion 1341

[0046] Sleeve portion 1342

[0047] First half axle gear 134A

[0048] Second half axle gear 134B

[0049] First anti-rotation surface 1331

[0050] Rotary support 140

[0051] Retainer 141

[0052] ​mounting hole 1410

[0053] rolling body 142

[0054] first bearing 150

[0055] second bearing 160

[0056] axial direction R DETAILED DESCRIPTION

[0057] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work are within the scope of protection of the present application.

[0058] Reference to “an embodiment” herein means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase that the phrase in various places in the specification are not necessarily all referring to the same embodiment, or are necessarily mutually exclusive or alternative embodiments. It is explicitly and implicitly understood that the embodiments described herein are capable of combination.

[0059] The present application provides a reducer assembly with a differential, in one embodiment, referring to Figure 1 , Figure 1 is a sectional view of the reducer assembly with a differential provided by the present application, the reducer assembly with a differential 100 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 housing 131, the drive gear 120 is rotationally connected to the reducer housing 110, and the drive gear 120 is fixedly connected to the differential half housing 131, so as to drive the differential half housing 131 to rotate through the rotation of the drive gear 120. Please refer to Figure 2 and Figure 3 , Figure 2 is a perspective structural schematic view of the differential half housing 131 and the drive gear 120 in the reducer assembly 100 of Figure 1 , Figure 3 is another perspective structural schematic view of the differential half housing 131 and the drive gear 120 of Figure 2 , Figures 1 to 3The driving gear 120 is integrally formed with the differential half housing 131, and the driving gear 120 and the differential half housing 131 can also be separately arranged, and the driving gear 120 and the differential half housing 131 are fixedly connected through a bolt fastener to realize power transmission between the driving gear 120 and the differential half housing 131.

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

[0062] The reducer housing 110 has a support matching surface 1100, and the support surface 1310 and the support matching surface 1100 are oppositely arranged along the axial direction R of the differential half housing 131, and the rotating support 140 is clamped between the support surface 1310 and the support matching surface 1100. The support surface 1310 can rotate relative to the support matching surface 1100 along the circumferential direction of the differential half housing 131 through the rotating support 140, so as to support the support surface 1310 of the differential half housing 131 on the support matching surface 1100 of the reducer housing 110.

[0063] In related technologies, the housing structure of the differential 130 is mostly composed of two half housings, and the two half housings are supported on the reducer housing 110. The weight of the differential 130 is large, and the present application only retains one half housing (differential half housing 131) of the differential 130, and cancels the other half housing. The differential half housing 131 is directly supported on the reducer housing 110 through the support surface 1310 thereon, so that the weight of the overall housing of the differential 130 is reduced, and the cost is reduced.

[0064] It should be noted that the driving gear 120 in the present application refers to the last stage of the reduction gear set in the reducer assembly 100, Figure 1 Only the last stage of the reduction gear is shown, and other reduction gears are omitted. The power output from the driving motor or engine of the vehicle is transmitted to the reduction gear set in the reducer assembly 100, and is transmitted to the differential half housing 131 after 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 housing 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 housing 131, and the support surface 1310 and the support mating surface 1100 are simpler in structure, and also facilitate the installation of the rotary support 140 between the support surface 1310 and the support mating surface 1100.

[0066] It should be noted that when the drive gear 120 and the differential half housing 131 are integrally arranged, the support surface 1310 can be arranged only on the end surface of the differential half housing 131, or can be arranged on the end surface of the drive gear 120 and the end surface of the differential half housing 131, that is, on the end surface of the overall structure formed by the drive gear 120 and the differential half housing 131.

[0067] Please refer to Figure 4 , Figure 4 is Figure 1 a perspective structural schematic diagram of an embodiment of the rotary support 140 in the reducer assembly 100. In some embodiments, the rotary support 140 includes a retainer 141 and a plurality of rolling bodies 142 rotatably connected to the retainer 141. The retainer 141 is in the form of a ring-shaped plate body structure, and a plurality of mounting holes 1410 penetrating the thickness direction of the retainer 141 are formed in the retainer 141. The plurality of mounting holes 1410 are arranged in a circumferential direction of the retainer 141, and the plurality of rolling bodies 142 are one-to-one correspondingly arranged in the plurality of mounting holes 1410. The rolling bodies 142 can rotate around the axis of the rolling bodies 142 relative to the retainer 141 in the mounting holes 1410.

[0068] The retainer 141 can be fixed to the reducer housing 110. In the thickness direction of the retainer 141, the side of the rolling bodies 142 facing the support surface 1310 protrudes from the plate surface of the retainer 141 facing the support surface 1310, so that the rolling bodies 142 are in contact with the support surface 1310, and the rolling bodies 142 are not in contact with the support mating surface 1100. Therefore, when the differential half housing 131 rotates relative to the reducer housing 110, the retainer 141 can be fixed, the support surface 1310 on the differential half housing 131 drives the rolling bodies 142 to rotate, and the rolling bodies 142 only have rotation, and rolling friction occurs between the rolling bodies 142 and the support surface 1310. In this way, the rotation of the support surface 1310 relative to the reducer housing 110 can be achieved by driving the rolling bodies 142 to rotate by the support surface 1310.

[0069] The cage 141 can also be fixed to the differential half housing 131, and in the thickness direction of the cage 141, the rolling body 142 protrudes from the plate surface of the cage 141 toward the support matching surface 1100, so that the rolling body 142 is in contact with the support matching surface 1100, and the rolling body 142 is not in contact with the support surface 1310, so that when the differential half housing 131 rotates relative to the reducer housing 110, the differential half housing 131 drives the cage 141 and each rolling body 142 on the cage 141 to rotate, and the rolling body 142 revolves around the central axis of the differential half housing 131, and the rolling body 142 also rotates by cooperating with the support matching surface 1100, and the rolling body 142 and the support matching surface 1100 are in rolling friction. In this way, in addition to revolving around the central axis of the differential half housing 131, the rolling body 142 also rotates, thereby realizing the rotation of the support surface 1310 relative to the reducer housing 110.

[0070] Specifically, the rolling body 142 is cylindrical and extends in the radial direction of the cage 141, and the mounting hole 1410 is a rectangular hole. In other embodiments, the rolling body 142 can also be a spherical or elliptical body, and it can be understood that the rolling body 142 is cylindrical, and has a larger contact area with the support surface 1310 or the support matching surface 1100.

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

[0072] Again refer to Figure 1 , the differential 130 also includes half shaft gears 134, planetary shafts 133 and planetary gears 132.

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

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

[0075] The basic principle of the differential 130 is briefly described below. Figure 1

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

[0077] When the vehicle travels straight, the resistance received by the left and right wheels is substantially the same, and the planetary gears 132 in the differential half housing 131 revolve with the differential half housing 131 without self-rotation.

[0078] When the vehicle turns, the distances traveled by the left and right wheels are different, and the resistances received are also different. The planetary gears 132 in the differential half housing 131 revolve with the differential half housing 131 while self-rotating to transmit more torque to the half shaft gears 134 on the side of the wheel with a longer travel distance. Due to the revolution of the planetary gears 132 plus their self-rotation, the rotational speeds of the left and right half shaft gears 134 are different, thereby enabling the vehicle to smoothly turn.

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

[0080] In combination with Figure 1 and Figure 3 , the differential half housing 131 is provided with a mounting cavity 1311. The meaning of the mounting cavity 1311 refers to the space defined by the inner wall of the differential half housing 131. The differential half housing 131 is provided with a mounting opening at one end in the axial direction R, which communicates with the mounting cavity 1311. The planetary shaft 133 and the planetary gear 132 pass through the mounting opening into the mounting cavity 1311. The meaning of the mounting opening refers to the opening area on the radially inner side of the annular support surface 1310.

[0081] ​The differential half housing 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 part 1342 of the first half axle gear 134A, the reducer housing 110 includes a first side wall 111 and a second side wall 112 arranged oppositely, please refer to Figure 5 , Figure 5 is Figure 1 a perspective view of the second side wall 112 of the reducer housing 110 of the reducer assembly 100 of the application, the support matching 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 rectangular dashed box in the figure refers to the reducer housing 110, which is only a schematic view, and the actual shape of the reducer housing 110 is set according to the needs.

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

[0083] The differential half housing 131 is limited and supported in the axial direction R and the radial direction by the first bearing 150 and the rotary support 140, specifically:

[0084] In the axial direction R of the differential 130 housing, the differential half housing 131 is stably supported on the reducer housing 110 by the first bearing 150 and the rotary support 140, specifically, the bearing outer ring of the first bearing 150 abuts on the first side wall 111 in the axial direction R of the differential 130 housing, and the bearing inner ring of the first bearing 150 abuts on the outer surface of the differential half housing 131 in the axial direction R of the differential 130 housing, so that the differential half housing 131 is clamped between the first side wall 111 and the second side wall 112 in the axial direction R, and the differential half housing 131 is limited and supported in the axial direction R.

[0085] In the radial direction of the differential 130 housing, the support cylinder 1315 of the differential half housing 131 is limited and supported in the radial direction of the differential 130 housing by the first bearing 150.

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

[0087] In the present embodiment, the gear portion 1341 of the second half axle gear 134B is pressed against the planetary gear 132, so as to press the planetary shaft 133 against the clamping groove 1313 in the differential half housing 131, and the gear portion 1341 of the second half axle gear 134B indirectly supports the planetary shaft 133, and completes the limiting of the planetary shaft 133 in the axial direction R of the differential half housing 131. In the related art, the fixation of the planetary shaft 133 in the differential 130 is mostly realized by the fasteners such as bolts, which are arranged in the planetary shaft 133 from the differential housing in the direction perpendicular to the axis of the planetary shaft 133, so as to realize the fixation of the planetary shaft 133 relative to the differential housing. However, the present embodiment does not need the fasteners to realize the fixation of the planetary shaft 133 relative to the differential half housing 131.

[0088] Again referring to Figure 3 In one embodiment, the inner wall of the differential half housing 131 is provided with two mounting portions 1312 protruding towards the mounting cavity 1311, the mounting portion 1312 is provided with a clamping groove 1313, the clamping groove 1313 is in communication with the mounting cavity 1311, and the opening of the clamping groove 1313 is in the axial direction R of the differential half housing 131 and faces the mounting opening, and the two ends of the planetary shaft 133 are respectively inserted into the clamping grooves 1313 on the two mounting portions 1312. The present embodiment realizes the fixation of the planetary shaft 133 relative to the differential half housing 131 by providing the mounting portion 1312 on the differential half housing 131, and avoids the direct slotting on the end face of the differential half housing 131 to accommodate the end portion of the planetary shaft 133, so as to avoid the low strength of the differential half housing 131.

[0089] Please refer to Figure 6 and Figure 7 , Figure 6 is Figure 1 the perspective structural schematic view of the planetary shaft 133 in the reducer assembly 100, Figure 7 is Figure 1Figure 6 is a front view of the planetary shaft 133 in the reducer assembly 100, in an embodiment, the outer side wall of the planetary shaft 133 is provided with a first anti-rotation surface 1331, and the slot wall of the clamping slot 1313 is provided with a second anti-rotation surface 1314. The first anti-rotation surface 1331 and the second anti-rotation surface 1314 are matched in shape to limit the rotation of the planetary shaft 133 relative to the clamping slot 1313 along the circumferential direction of the planetary shaft 133. Specifically, the first anti-rotation surface 1331 and the second anti-rotation surface 1314 are both flat surfaces. In this embodiment, the two ends of the planetary shaft 133 are respectively mounted to the two mounting portions 1312. The anti-rotation cooperation between the planetary shaft 133 and the mounting portions 1312 allows the relative fixation of the planetary shaft 133 and the mounting portions 1312 when the second half shaft gear 134B is pressed against the planetary gear 132, facilitating the rotation of the planetary gear 132 on the planetary shaft 133 and avoiding the rotation of the planetary shaft 133 along with the planetary gear 132.

[0090] Since the planetary shaft 133 is clamped into the clamping slot 1313 through the opening of the clamping slot 1313, the first anti-rotation surface 1331 and the second anti-rotation surface 1314 are better fitted after the planetary shaft 133 is clamped into the clamping slot 1313, so that the relative fixation effect between the planetary shaft 133 and the mounting portions 1312 is better. The second anti-rotation surface 1314 on the mounting portion 1312 is two, 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 slot walls of the clamping slot 1313. Correspondingly, the first anti-rotation surface 1331 on the end of the planetary shaft 133 is also two, and the two first anti-rotation surfaces 1331 are arranged opposite to each other in the radial direction of the planetary shaft 133 and parallel to each other. In this way, when the two ends of the planetary shaft 133 are respectively clamped into the two clamping slots 1313 through the openings of the two clamping slots 1313, the two first anti-rotation surfaces 1331 on the end of the planetary shaft 133 can respectively slide into the clamping slot 1313 against the two second anti-rotation surfaces 1314 on the mounting portion 1312, so that the end of the planetary shaft 133 is tightly fitted with the slot wall of the clamping slot 1313.

[0091] In addition, since the support surface 1310 on the differential half housing 131 needs to be supported on the support matching surface 1100 on the reducer housing 110, to avoid interference of the mounting portion 1312 with the cooperation between the support surface 1310 and the support matching surface 1100, the mounting portion 1312 should not protrude from the support surface 1310 in the axial direction R of the differential half housing 131, for example, the surface of the mounting portion 1312 in the axial direction R of the differential half housing 131 is flush with the support surface 1310, or the surface of the mounting portion 1312 in the axial direction R of the differential half housing 131 is recessed relative to the support surface 1310.

[0092] In one embodiment, in order to realize lubrication when the planetary gear 132 and the differential half housing 131 rotate relatively, the differential 130 further comprises planetary pads 1321 sleeved on the planetary shaft 133, the planetary pads 1321 are shaped as partial spherical surfaces, the concave surfaces of the planetary pads 1321 are attached to the axial end surfaces of the planetary gears 132, and correspondingly, the axial R end surfaces of the planetary gears 132 facing the concave surfaces of the planetary pads 1321 are convex surfaces; the convex surfaces of the planetary pads 1321 are attached to the inner walls of the differential half housing 131, specifically, are attached to the surfaces of the mounting portions 1312 facing the planetary gears 132, and correspondingly, the surfaces of the mounting portions 1312 facing the convex surfaces of the planetary pads 1321 are concave surfaces. In this embodiment, since the planetary gears 132 and the mounting portions 1312 are both two, the planetary pads 1321 are also two, and one planetary gear 132 corresponds to one planetary pad 1321.

[0093] The application also provides a vehicle comprising the differential-equipped speed reducer assembly 100. The specific structure of the differential-equipped speed reducer assembly 100 is referred to the above-mentioned embodiments, and since the vehicle adopts all the technical solutions of the above-mentioned embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here.

[0094] The terms "first", "second", "third" in the present application are only for descriptive purpose, and cannot be understood as indicating the number of the technical features indicated. Therefore, the features limited by "first", "second", "third" can explicitly or implicitly include at least one of the features. All the directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only for explaining the relative position relationship, movement condition, etc. between the components in a certain posture (as shown in the drawings), and if the certain posture changes, the directional indications also change accordingly. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion.

[0095] The above-mentioned only is the embodiment of the present application, and does not limit the patent scope of the present application, and any equivalent structure or equivalent process transformation using the content of the specification and drawings of the present application, or direct or indirect application 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 drive gear, a differential and a rotating support, wherein the differential comprises a differential half-shell, the drive gear is rotatably connected to the reducer housing, and the drive gear is fixedly connected to the differential half-shell, so that the rotation of the drive gear drives the differential half-shell to rotate; 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 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 and the support mating surface are arranged opposite to each other, 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 differential half-shell on the support mating surface of the reducer housing.

2. The speed reducer assembly with a 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 a 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 a 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 running 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 each mounting hole one by one, and the rolling bodies can rotate around their own axes relative to the retaining frame.

5. The speed reducer assembly with a 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 a differential according to claim 1, characterized in that: The differential also includes side gears, planetary shafts and planetary gears; The side gear comprises a gear portion and a sleeve portion, and there are two side gears, which are respectively a first side gear and a second side 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 side 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 are inserted 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 side gear has a second side 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 side gear, so that the second side gear is pressed against the planetary gear in the axial direction of the differential half-shell, and the planetary shaft is further 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 portions protruding toward the mounting cavity, each of the mounting portions is provided with a slot, the slot being in communication with the mounting cavity, and the opening of the slot is axially oriented 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.

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 surface 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 the speed reducer assembly according to any one of claims 1 to 9.

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