Planetary differential mechanism

Abstract

The invention relates to the technical field of differential mechanisms, and discloses a planet differential mechanism which comprises a power input planet carrier, a power output planet carrier, a planet wheel set, a first sun wheel and a second sun wheel, and the power input planet carrier is used for being connected with a power input source; the power output planet carrier is connected with the power input planet carrier, a separator is arranged in the power output planet carrier, and the interior of the power output planet carrier is divided into a first accommodating cavity and a second accommodating cavity by the separator; the planet wheel set is assembled on the power output planet carrier; the first sun gear is assembled in the first containing cavity and abuts against one side of the isolation piece, and the first sun gear is meshed with part of planet gears of the planet gear set. The second sun gear is assembled in the second containing cavity and abuts against the other side of the isolation piece, and the second sun gear is meshed with the other part of planet gears of the planet gear set. The first sun gear and the second sun gear are isolated through the isolation piece, mutual interference between the sun gears and mutual interference between the sun gears and the planet gears are avoided, and the planet differential operates smoothly.

Description

Technical Field

[0001] The present invention relates to the technical field of differentials, and in particular to a planetary differential. Background Art

[0002] The differential is set to adjust the speed difference between the left and right drive wheels, which can make the left and right drive wheels rotate at different speeds. When walking equipment such as AGV carts and mobile robots turn or drive on uneven roads, the speed difference between the left and right drive wheels is adjusted through the differential to ensure that the left and right drive wheels perform pure rolling motion. The planetary differential uses the principle of planetary structure to achieve speed difference regulation. It generally includes a planetary gear train, a sun gear and a planet carrier. The power enters the differential and directly drives the planet carrier to rotate, and then drives the sun gear to rotate through the planetary gear train, and outputs the power to the left and right drive wheels through the sun gear. At present, the sun gear that outputs power to the left drive wheel and the sun gear that outputs power to the right drive wheel of the existing planetary differential are arranged opposite to each other, and the installation space between the two sun gears is interconnected, which will cause the sun gear to easily move axially and interfere with other planetary gears. Summary of the invention

[0003] The object of the present invention is to provide a planetary differential to solve the problem that the sun gear is prone to axial movement and interferes with other planetary gears.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] The present invention provides a planetary differential, comprising:

[0006] A power input planet carrier, used for connecting a power input source;

[0007] A power output planetary carrier connected to the power input planetary carrier, wherein a spacer is provided inside the power output planetary carrier, and the spacer separates the interior of the power output planetary carrier into a first accommodating chamber and a second accommodating chamber;

[0008] A planetary gear set, mounted on the power output planetary carrier;

[0009] A first sun gear is assembled in the first accommodating cavity and abuts against one side of the isolation member, the first sun gear meshing with some planetary gears in the planetary gear set; and

[0010] The second sun gear is assembled in the second accommodating cavity and abuts against the other side of the isolation member, and the second sun gear is meshed with another part of the planetary gears in the planetary gear set.

[0011] In some embodiments, the power output planetary carrier includes a first frame body and a second frame body connected to each other, a first accommodating cavity is formed inside the first frame body, and a second accommodating cavity is formed inside the second frame body. The isolation member is arranged between the first frame body and the second frame body, and the isolation member is connected to one of the first frame body and the second frame body.

[0012] In some embodiments, the isolation member is disposed on a side of the second frame facing the first frame and is integrally formed with the second frame, and the isolation member blocks an end of the second accommodating cavity close to the first frame.

[0013] In some embodiments, the planetary gear set comprises:

[0014] A plurality of first planetary gears are mounted on the first frame and arranged around the first sun gear, and each of the first planetary gears is respectively meshed with the first sun gear;

[0015] A plurality of second planetary gears are assembled on the second frame and arranged around the second sun gear, and each of the second planetary gears is respectively meshed with the second sun gear.

[0016] In some embodiments, a plurality of the first planetary gears are arranged in one-to-one correspondence with a plurality of the second planetary gears, and a portion of the first planetary gears extends into the second frame to mesh with the corresponding second planetary gears.

[0017] In some embodiments, one end of the gear teeth of the first planetary gear meshing with the second planetary gear is flush with a side of the isolation member facing the second accommodating cavity, and one end of the gear teeth of the second planetary gear meshing with the first planetary gear is flush with a side of the isolation member facing the first accommodating cavity.

[0018] In some embodiments, a first limiting groove is provided in the second frame, and one end of the gear teeth of the first planetary gear meshing with the second planetary gear is inserted in the first limiting groove and abuts against the bottom surface of the first limiting groove; an installation groove is provided on one side of the power input planetary frame, and one end of the gear teeth of the first planetary gear meshing with the first sun gear passes through the first frame and abuts against the bottom surface of the installation groove.

[0019] In some embodiments, a second limiting groove is further provided in the second frame, and one end of the gear teeth of the second planetary gear meshing with the second sun gear is inserted in the second limiting groove and abuts against the bottom surface of the second limiting groove; one end of the gear teeth of the second planetary gear meshing with the first planetary gear abuts against the first frame.

[0020] In some embodiments, a first positioning hole is provided on the power input planetary carrier, a second positioning hole matching the first positioning hole is provided on the first frame body, a positioning groove is provided on the second frame body, and a positioning pin passes through the first positioning hole and the corresponding second positioning hole and is inserted into the positioning groove.

[0021] In some embodiments, in the radial direction of the power output planetary carrier, the planetary gear set, the first sun gear, and the second sun gear are all enclosed in the power output planetary carrier.

[0022] Compared with the prior art, the planetary differential in the embodiment of the present invention has the following beneficial effects:

[0023] The planetary differential of the embodiment of the present invention comprises a power input planetary carrier, a power output planetary carrier, a planetary gear set, a first sun gear and a second sun gear, and the power input source inputs power to the planetary differential through the power input planetary carrier. The power input planetary carrier transmits power to the power output planetary carrier, drives the planetary gear set to rotate through the power output planetary carrier, and then drives the first sun gear and the second sun gear to rotate, and outputs power outward through the first sun gear and the second sun gear. In the present application, an isolating member is arranged in the power output planetary carrier, and the first sun gear and the second sun gear are separated by the isolating member. On the one hand, the isolating member can limit the first sun gear and the second sun gear, and prevent the first sun gear and the second sun gear from moving toward each other in the axial direction, thereby preventing the first sun gear and the second sun gear from interfering with each other; on the other hand, because the isolating member limits the axial movement of the first sun gear and the second sun gear, it can prevent the first sun gear and the part of the planetary gear meshing with the second sun gear in the planetary gear set from interfering with each other, and prevent the second sun gear and the part of the planetary gear meshing with the first sun gear in the planetary gear set from interfering with each other. Therefore, the present application can make the planetary differential run smoothly and avoid the phenomenon of tooth jamming or gear tooth collision in the planetary differential. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic structural diagram of a planetary differential according to an embodiment of the present application;

[0025] Figure 2 is an exploded view of the planetary differential described in the embodiment of the present application;

[0026] Figure 3 is a schematic top view of a planetary differential according to an embodiment of the present application;

[0027] Figure 4 yes Figure 3 AA section view in the figure;

[0028] Figure 5 yes Figure 3 BB section view in the figure;

[0029] Figure 6 is a schematic structural diagram of a power input planet carrier in an embodiment of the present application;

[0030] Figure 7 is a schematic diagram of another perspective of the power input planet carrier in the embodiment of the present application;

[0031] Figure 8 is a schematic structural diagram of the first frame in an embodiment of the present application;

[0032] Fig. 9 This is a schematic diagram of the cooperation between the first frame and the planetary gear set in the embodiment of the present application;

[0033] Fig.10 is a schematic structural diagram of the second frame in an embodiment of the present application;

[0034] Fig.11 is a schematic diagram of another viewing angle of the second frame in the embodiment of the present application;

[0035] Fig.12 is a schematic top view of the second frame in the embodiment of the present application;

[0036] Fig.13 yes Fig.12 CC section view in the figure;

[0037] Fig.14 is a schematic diagram of the cooperation between the second frame and the planetary gear set in the embodiment of the present application;

[0038] Fig.15 It is a schematic diagram of the coordination between the planetary gear set and the first sun gear and the second sun gear in the embodiment of the present application.

[0039] Numbers in the figure:

[0040] 1. Power input planetary carrier; 11. Mounting groove; 12. First positioning hole; 13. Convex ring; 131. Shaft hole; 132. Bolt hole; 2. Power output planetary carrier; 21. Isolation piece; 22. First frame; 221. First accommodating cavity; 222. Second positioning hole; 223. Mounting hole; 23. Second frame; 231. Second accommodating cavity; 232. First limiting groove; 233. Second limiting groove; 234. Positioning groove; 235. Positioning pin; 236. Bolt; 3. Planetary gear set; 31. First planetary gear; 32. Second planetary gear; 33. Wheel axle; 4. First sun gear; 5. Second sun gear. DETAILED DESCRIPTION

[0041] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0042] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0044] See also Figure 1-Figure 15 As shown, an embodiment of the present invention provides a planetary differential for a two-wheel vehicle, comprising a power input planetary carrier 1, a power output planetary carrier 2, a planetary gear set 3, a first sun gear 4 and a second sun gear 5, wherein the power input planetary carrier 1 is used to connect a power input source; the power output planetary carrier 2 is connected to the power input planetary carrier 1, and a spacer 21 is provided in the power output planetary carrier 2, and the spacer 21 divides the interior of the power output planetary carrier 2 into a first accommodating chamber 221 and a second accommodating chamber 231; the planetary gear set 3 is mounted on the power output planetary carrier 2, and the planetary gear set 3 includes a plurality of planetary gears; the first sun gear 4 is mounted in the first accommodating chamber 221 and abuts against one side of the spacer 21, and the first sun gear 4 meshes with some of the planetary gears in the planetary gear set 3; the second sun gear 5 is mounted in the second accommodating chamber 231 and abuts against the other side of the spacer 21, and the second sun gear 5 meshes with another part of the planetary gears in the planetary gear set 3. The power input source inputs power to the planetary differential through the power input planetary carrier 1. The power input planetary carrier 1 transmits power to the power output planetary carrier 2, which drives the planetary gear set 3 to rotate, thereby driving the first sun gear 4 and the second sun gear 5 to rotate, and outputs power to the outside through the first sun gear 4 and the second sun gear 5.

[0045] In the present application, an isolating member 21 is provided in the power output planetary carrier 2, and the first sun gear 4 and the second sun gear 5 are isolated by the isolating member 21. On the one hand, the isolating member 21 can limit the first sun gear 4 and the second sun gear 5, and prevent the first sun gear 4 and the second sun gear 5 from moving toward each other in the axial direction, thereby preventing the first sun gear 4 and the second sun gear 5 from interfering with each other. On the other hand, since the isolating member 21 limits the axial movement of the first sun gear 4 and the second sun gear 5, it can prevent the first sun gear 4 and the part of the planetary gears meshing with the second sun gear 5 in the planetary gear set 3 from interfering with each other, and prevent the second sun gear 5 and the part of the planetary gears meshing with the first sun gear 4 in the planetary gear set 3 from interfering with each other. Therefore, the present application can make the planetary differential run smoothly and avoid the phenomenon of tooth jamming or gear collision in the planetary differential.

[0046] The power input planetary carrier 1 is used to input power into the planetary differential. The power input source can be a motor. The outer peripheral side of the power input planetary carrier 1 is provided with gear teeth. The output shaft of the motor is provided with an input gear, and the input gear meshes with the gear teeth of the power input planetary carrier 1. When the output shaft of the motor rotates, it drives the gear to rotate, and the power input planetary carrier 1 is driven to rotate through the gear. Since the power input planetary carrier 1 is connected to the power output planetary carrier 2, when the power input planetary carrier 1 rotates, the power output planetary carrier 2 can be driven to rotate. The power input planetary carrier 1 and the power output planetary carrier 2 are detachably connected, which is convenient for assembly and disassembly. Figure 2 Optionally, the power input planet carrier 1 and the power output planet carrier 2 can be connected by bolts 236, and corresponding bolt holes 132 are provided on the power input planet carrier 1 and the power output planet carrier 2, and the bolts 236 pass through the corresponding bolt holes 132 to fasten the power input planet carrier 1 and the power output planet carrier 2. A plurality of bolts 236 can be provided, and they are arranged at equal intervals along the circumference of the power input planet carrier 1.

[0047] See also Figure 1 As shown, in some embodiments, in the radial direction of the power output planetary carrier 2, the planetary gear set 3, the first sun gear 4, and the second sun gear 5 are all enclosed in the power output planetary carrier 2. In order to improve the lubrication effect between the planetary gear set 3 and the first sun gear 4 and the second sun gear 5, grease is used as grease. Since there is a large centrifugal force during the operation of the planetary differential, the planetary gear set 3, the first sun gear 4, and the second sun gear 5 are enclosed in the power output planetary carrier 2 to prevent the lubricating grease meshing with the planetary gear set 3 and the first sun gear 4 and the second sun gear 5 from being thrown out of the gear tooth surface by the large centrifugal force, or even thrown out of the power output planetary carrier 2, which affects the lubrication effect and causes the tooth jam phenomenon.

[0048] See also Figure 1-Figure 5As shown, in some embodiments, the power output planetary carrier 2 includes a first frame 22 and a second frame 23 connected to each other, and the first frame 22 and the second frame 23 are detachably connected. Optionally, the first frame 22 and the second frame 23 can be connected by bolts 236. The bolts 236 pass through the power input planetary carrier 1, the first frame 22 and the second frame 23 in sequence to achieve a fastening connection between the three. The outer circumference of the first frame 22 and the outer circumference of the second frame 23 are both closed annular surfaces, which are convenient for closing the planetary gear set 3, the first sun gear 4 and the second sun gear 5. The first frame 22 forms a first accommodating cavity 221 inside, and the second frame 23 forms a second accommodating cavity 231 inside. The isolation member 21 is arranged between the first frame 22 and the second frame 23, and the isolation member 21 is connected to one of the first frame 22 and the second frame 23. The first frame 22 and the second frame 23 are separated by the isolation member 21, so as to separate the first sun gear 4 and the second sun gear 5. The power output planetary carrier 2 is configured as a split structure of the first frame body 22 and the second frame body 23, which facilitates the assembly and disassembly of the power output planetary carrier 2, and the manufacturing and forming of the power output planetary carrier 2, especially the processing and forming of the first accommodating cavity 221 and the second accommodating cavity 231, and the processing of structures such as holes and grooves on the first frame body 22 and the second frame body 23.

[0049] See also Figure 4 and Fig.13 As shown, in some embodiments, the isolating member 21 is disposed on the side of the second frame 23 facing the first frame 22, and the isolating member 21 blocks one end of the second accommodating cavity 231 close to the first frame 22, so that the first sun gear 4 and the second sun gear 5 are isolated. The isolating member 21 is integrally formed with the second frame 23, and the isolating member 21 and the second frame 23 together form a cylindrical structure, one end of the cylindrical structure is open, and the other end is closed by the isolating member 21, and the inner cavity of the cylindrical structure forms the second accommodating cavity 231. Bolt holes 132 and the like can be provided on the side wall of the cylindrical structure. A mounting hole 223 for mounting a planetary gear can be provided on the side wall of the cylindrical structure, and the mounting hole 223 is connected to the second accommodating cavity 231, so that the planetary gear and the second sun gear 5 can be meshed with each other. The first frame 22 is an annular structure, and the inner space of the annular structure forms a first accommodating cavity 221. The bolt holes 132 and the mounting holes 223 for mounting the planetary gears are all opened on the side wall of the annular structure, and the mounting holes 223 are connected to the first accommodating cavity 221 to facilitate the engagement of the planetary gears with the first sun gear 4.

[0050] It should be noted that in other embodiments, the isolating member 21 may also be integrally formed with the first frame 22 . In this case, the first frame 22 and the isolating member 21 form a cylindrical structure, and the second frame 23 is an annular structure.

[0051] See also Figure 6-Figure 14As shown, in some embodiments, a first positioning hole 12 is provided on the power input planetary carrier 1, a second positioning hole 222 matching the first positioning hole 12 is provided on the first frame body 22, a positioning groove 234 is provided on the second frame body 23, and a positioning pin 235 passes through the first positioning hole 12 and the corresponding second positioning hole 222 and is inserted into the positioning groove 234. Through the cooperation of the first positioning hole 12, the second positioning hole 222, the positioning groove 234 and the positioning pin 235, the power input planetary carrier 1, the first frame body 22 and the second frame body 23 are positioned to facilitate the connection of the three. In addition, the setting of the positioning groove 234 can also play an axial limiting role on the positioning pin 235 to prevent the axial movement of the positioning pin 235. In this embodiment, a plurality of first positioning holes 12 are provided, and the plurality of first positioning holes 12 are arranged at equal intervals along the circumference of the power input planetary carrier 1. Accordingly, a plurality of second positioning holes 222, positioning grooves 234 and positioning pins 235 are provided respectively.

[0052] See also Figure 2-Figure 5 , Fig. 9 and Fig.15 As shown, in some embodiments, the planetary gear set 3 includes a plurality of first planetary gears 31 and a plurality of second planetary gears 32. The plurality of first planetary gears 31 are mounted on the first frame 22 and arranged around the first sun gear 4. Each first planetary gear 31 is respectively meshed with the first sun gear 4; the plurality of second planetary gears 32 are mounted on the second frame 23 and arranged around the second sun gear 5. Each second planetary gear 32 is respectively meshed with the second sun gear 5. When the first frame 22 rotates with the power input to the planetary frame 1, the first planetary gears 31 are driven to rotate, and the first sun gear 4 is driven to rotate by the rotation of the first planetary gears 31, so that the power is output outwardly through the first sun gear 4. When the second frame 23 rotates with the power input to the planetary frame 1, the second planetary gears 32 are driven to rotate, and the second sun gear 5 is driven to rotate by the second planetary gears 32, so that the power is output outwardly through the second sun gear 5. The plurality of first planetary gears 31 are evenly arranged along the circumference of the first sun gear 4 , and the plurality of second planetary gears 32 are evenly arranged along the circumference of the second sun gear 5 , so that the first sun gear 4 and the second sun gear 5 are subjected to uniform force.

[0053] See also Fig.15As shown, in some embodiments, a plurality of first planetary gears 31 and a plurality of second planetary gears 32 are arranged one by one, and a portion of the first planetary gear 31 extends into the second frame 23 and meshes with the corresponding second planetary gear 32. Under this arrangement, the first planetary gear 31 is not only meshed with the first sun gear 4, but also meshed with the second planetary gear 32; the second planetary gear 32 is not only meshed with the second sun gear 5, but also meshed with the first planetary gear 31. The use of this multi-tooth meshing arrangement can increase the bearing capacity of the tooth surface, output a larger torque, and reduce the volume of the planetary differential. The figure shows that three first planetary gears 31 and three second planetary gears 32 are arranged respectively, and the three first planetary gears 31 are arranged at equal intervals along the circumference of the first sun gear 4, and the three second planetary gears 32 are arranged at equal intervals along the circumference of the second sun gear 5. In other embodiments, the first planetary gear 31 and the second planetary gear 32 can also be arranged in four or five or other numbers.

[0054] See also Figure 4 and Figure 5 As shown, in some embodiments, one end of the gear teeth of the first planetary gear 31 meshing with the second planetary gear 32 is flush with the side of the isolating member 21 facing the second accommodating cavity 231. Since the second sun gear 5 abuts against the isolating member 21, the gear teeth of the first planetary gear 31 and the gear teeth of the second sun gear 5 do not contact each other in the axial direction, thereby avoiding interference between the first planetary gear 31 and the second sun gear 5. One end of the gear teeth of the second planetary gear 32 meshing with the first planetary gear 31 is flush with the side of the isolating member 21 facing the first accommodating cavity 221. Since the first sun gear 4 abuts against the isolating member 21, the second planetary gear 32 will not extend into the first accommodating cavity 221 and mesh with the first sun gear 4, thereby avoiding interference between the second planetary gear 32 and the first sun gear 4.

[0055] See also Figure 4-Figure 14 As shown, in order to facilitate the positioning of the first planetary gear 31 and prevent the first planetary gear 31 from axial movement, a first limiting groove 232 is provided in the second frame 23, and one end of the gear teeth of the first planetary gear 31 meshing with the second planetary gear 32 is inserted into the first limiting groove 232 and abuts against the bottom surface of the first limiting groove 232; a mounting groove 11 is provided on one side of the power input planetary frame 1, and one end of the gear teeth of the first planetary gear 31 meshing with the first sun gear 4 passes through the first frame 22 and abuts against the bottom surface of the mounting groove 11. The first limiting groove 232 and the second limiting groove 233 are used to limit the axial ends of the gear teeth of the first planetary gear 31 respectively, so as to prevent the first planetary gear 31 from axial movement, so that one end of the gear teeth of the first planetary gear 31 can be kept in a state flush with the side of the isolation member 21 facing the second accommodating cavity 231. The first frame 22 is assembled in the mounting groove 11, and the mounting groove 11 provides a mounting space for the first frame 22. A convex ring 13 is disposed on the other side of the power input planetary carrier 1 . The inner space of the convex ring 13 is communicated with the inner space of the mounting groove 11 . The first sun gear 4 penetrates the first carrier body 22 and extends into the convex ring 13 .

[0056] In order to facilitate the meshing of the first planetary gear 31 and the first sun gear 4, the mounting hole 223 for mounting the first planetary gear 31 provided on the first frame 22 is communicated with the first accommodating cavity 221 for mounting the first sun gear 4. Figure 8 As shown, the cross-sectional profile formed by each mounting hole 223 and the first accommodating cavity 221 is a closed figure surrounded by multiple arc-shaped edges.

[0057] See also Fig.10 As shown, in some embodiments, a second limiting groove 233 is further provided in the second frame 23, and one end of the gear teeth of the second planetary gear 32 meshing with the second sun gear 5 is inserted into the second limiting groove 233 and abuts against the bottom surface of the groove of the second limiting groove 233; one end of the gear teeth of the second planetary gear 32 meshing with the first planetary gear 31 abuts against the first frame 22. The second planetary gear 32 is limited by the second limiting groove 233 and the first frame 22 to prevent the second planetary gear 32 from axial movement and to avoid mutual interference between the second planetary gear 32 and the first sun gear 4. The second limiting groove 233 is connected to the first limiting groove 232, so that the second planetary gear 32 and the first planetary gear 31 can mesh with each other. In order to prevent the second planetary gear 32 from meshing with the first sun gear 4, the groove depths of the first limiting groove 232 and the second limiting groove 233 are different. The depth of the first limiting groove 232 is less than the depth of the second limiting groove 233.

[0058] In order to facilitate the installation of the first planetary gear 31 and the second planetary gear 32, the first planetary gear 31 and the second planetary gear 32 are respectively sleeved on the axle 33. When the first planetary gear 31 is assembled on the first frame 22, the two ends of the axle 33 of the first planetary gear 31 are respectively inserted into the power input planetary frame 1 and the second frame 23. Specifically, an axial hole 131 matching the axle 33 can be provided at the corresponding positions of the power input planetary frame 1 and the second frame 23, wherein the axial hole 131 on the power input planetary frame 1 is provided on the convex ring 13, and the axial hole 131 on the second frame 23 corresponding to the first planetary gear 31 is provided at the bottom of the first limiting groove 232 and passes through the bottom of the first limiting groove 232. When the second planetary gear 32 is assembled on the second frame 23, the two ends of the axle 33 of the second planetary gear 32 are respectively inserted into the first frame 22 and the second frame 23. Specifically, an axial hole 131 matching the axle 33 can be set at corresponding positions of the first frame 22 and the second frame 23, wherein the axial hole 131 on the second frame 23 corresponding to the second planetary gear 32 is opened at the bottom of the second limiting groove 233 and passes through the bottom of the second limiting groove 233.

[0059] The working process of the present invention is:

[0060] The power input source transmits power to the power input planetary carrier 1, driving the power input planetary carrier 1 to rotate. The power input planetary carrier 1 drives the first frame 22 and the second frame 23 to rotate, so that the first planetary gear 31 and the second planetary gear 32 rotate, and then the first sun gear 4 is driven to rotate through the first planetary gear 31, and the second sun gear 5 is driven to rotate through the second planetary gear 32. The first sun gear 4 and the second sun gear 5 output power to the outside, driving the left and right driving wheels to move.

[0061] In summary, the embodiment of the present invention provides a planetary differential, which drives the planetary gear set 3 to rotate through the power output planetary carrier 2, thereby driving the first sun gear 4 and the second sun gear 5 to rotate, and outputs power outward through the first sun gear 4 and the second sun gear 5. In the present application, an isolating member 21 is arranged in the power output planetary carrier 2, and the first sun gear 4 and the second sun gear 5 are separated by the isolating member 21. On the one hand, the isolating member 21 can limit the first sun gear 4 and the second sun gear 5, so as to prevent the first sun gear 4 and the second sun gear 5 from moving toward each other in the axial direction, thereby preventing the first sun gear 4 and the second sun gear 5 from interfering with each other; on the other hand, since the isolating member 21 limits the axial movement of the first sun gear 4 and the second sun gear 5, it is possible to avoid mutual interference between the first sun gear 4 and the part of the planetary gears meshing with the second sun gear 5 in the planetary gear set 3, and to avoid mutual interference between the second sun gear 5 and the part of the planetary gears meshing with the first sun gear 4 in the planetary gear set 3. Therefore, the present application can make the planetary differential run smoothly and avoid the phenomenon of tooth jamming or gear collision in the planetary differential.

[0062] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A planetary differential, characterized in that: include: A power input planet carrier, used for connecting a power input source; A power output planetary carrier connected to the power input planetary carrier, wherein a spacer is provided inside the power output planetary carrier, and the spacer separates the interior of the power output planetary carrier into a first accommodating chamber and a second accommodating chamber; A planetary gear set, mounted on the power output planetary carrier; A first sun gear is assembled in the first accommodating cavity and abuts against one side of the isolation member, and the first sun gear is meshed with some planetary gears in the planetary gear set; as well as The second sun gear is assembled in the second accommodating cavity and abuts against the other side of the isolation member, and the second sun gear is meshed with another part of the planetary gears in the planetary gear set.

2. The planetary differential according to claim 1, characterized in that: The power output planetary carrier includes a first frame body and a second frame body connected to each other, a first accommodating cavity is formed inside the first frame body, and a second accommodating cavity is formed inside the second frame body. The isolating member is arranged between the first frame body and the second frame body, and the isolating member is connected to one of the first frame body and the second frame body.

3. The planetary differential according to claim 2, characterized in that: The isolating member is disposed on a side of the second frame body facing the first frame body and is integrally formed with the second frame body. The isolating member blocks an end of the second accommodating cavity close to the first frame body.

4. The planetary differential according to claim 2, characterized in that: The planetary gear set comprises: A plurality of first planetary gears are mounted on the first frame and arranged around the first sun gear, and each of the first planetary gears is respectively meshed with the first sun gear; A plurality of second planetary gears are assembled on the second frame and arranged around the second sun gear, and each of the second planetary gears is respectively meshed with the second sun gear.

5. The planetary differential according to claim 4, characterized in that: The plurality of first planetary gears are arranged in one-to-one correspondence with the plurality of second planetary gears, and the first planetary gears partially extend into the second frame to mesh with the corresponding second planetary gears.

6. The planetary differential according to claim 5, characterized in that: One end of the gear teeth of the first planetary gear meshing with the second planetary gear is flush with a side of the isolating member facing the second accommodating cavity, and one end of the gear teeth of the second planetary gear meshing with the first planetary gear is flush with a side of the isolating member facing the first accommodating cavity.

7. The planetary differential according to claim 5, characterized in that: A first limiting groove is provided in the second frame body, and one end of the gear teeth of the first planetary gear meshing with the second planetary gear is inserted in the first limiting groove and abuts against the bottom surface of the first limiting groove; an installation groove is provided on one side of the power input planetary frame, and one end of the gear teeth of the first planetary gear meshing with the first sun gear passes through the first frame body and abuts against the bottom surface of the installation groove.

8. The planetary differential according to claim 5, characterized in that: A second limiting groove is also provided in the second frame, and one end of the gear teeth of the second planetary gear meshing with the second sun gear is inserted in the second limiting groove and abuts against the bottom surface of the second limiting groove; one end of the gear teeth of the second planetary gear meshing with the first planetary gear abuts against the first frame.

9. The planetary differential according to claim 2, characterized in that: The power input planetary carrier is provided with a first positioning hole, the first frame body is provided with a second positioning hole matching the first positioning hole, the second frame body is provided with a positioning groove, and the positioning pin passes through the first positioning hole and the corresponding second positioning hole and is inserted into the positioning groove.

10. The planetary differential according to claim 1, characterized in that: In the radial direction of the power output planetary carrier, the planetary gear set, the first sun gear, and the second sun gear are all enclosed in the power output planetary carrier.

Images