Planet carrier, planet assembly, driving system and vehicle

Abstract

The utility model provides a planet carrier, a planet assembly, a driving system and a vehicle. The planet carrier comprises a first support and a second support. The first support comprises a support body, a plurality of first supporting arms extending from one side of the support body in the axial direction and second supporting arms extending from the first supporting arms in the axial direction. The projection area of the first supporting arm in the axial direction is smaller than that of the second supporting arm in the axial direction. The second support is connected with the second supporting arms. According to the planet carrier, the supporting arm of the first support is in the T-shaped design, and compared with an I-shaped supporting arm in the prior art, the T-shaped supporting arm can improve the supporting rigidity, increase the connecting area between the second support and the first support and enhance the impact resistance and torsional deformation resistance of the planet carrier so as to meet the use requirement.

Description

TECHNICAL FIELD

[0001] The utility model relates to planetary carrier technical field especially relates to a planetary carrier, planetary assembly, drive system and vehicle. BACKGROUND

[0002] The planetary assembly generally includes planetary carrier, sun gear and planetary gear and other components arranged on the planetary carrier, has the advantages of compact structure, large speed ratio, high transmission efficiency. With the development of driving technology, the upper limit of motor speed is constantly improved, thus the performance of planetary assembly also needs to be improved, and the reliability of planetary assembly as an important component of motor torque transmission is particularly important. Since the planetary carrier is a key component for torque transmission in the planetary assembly, it needs to have high torsional deformation resistance and impact resistance, and the existing planetary carrier is generally connected as a whole frame structure by two annular plates and a plurality of support plates, wherein the support plates are located between the two annular plates, and the two ends thereof are connected with the two annular plates. The torsional deformation resistance and impact resistance of this kind of planetary carrier are low. SUMMARY

[0003] The utility model provides a kind of planetary carrier, planetary assembly, drive system and vehicle, to solve the problem of low torsional deformation resistance and impact resistance of existing planetary carrier.

[0004] A planetary carrier includes a first support and a second support.

[0005] The first support includes a support body, a plurality of first support arms extending from one side of the support body in an axial direction, and a second support arm extending from each first support arm in an axial direction.

[0006] The projection area of the first support arm in the axial direction is smaller than the projection area of the second support arm in the axial direction.

[0007] The second support is connected with the plurality of second support arms.

[0008] Preferably, a plurality of reinforcing ribs are provided on the second support; each reinforcing rib is arranged opposite to a second support arm.

[0009] Preferably, a clamping groove is provided on the inner side wall of the second support arm, and the second support is installed in the clamping groove.

[0010] Preferably, a plurality of limiting protrusions are provided on the second support, and an installation groove is formed between two adjacent limiting protrusions; each installation groove is installed with a second support arm.

[0011] Preferably, the first mounting hole and a plurality of second mounting holes are arranged around the periphery of the first mounting hole are arranged on the bracket body, and one second mounting hole is arranged between two adjacent first support arms; the third mounting hole and a plurality of fourth mounting holes are arranged around the periphery of the third mounting hole are arranged on the second bracket.

[0012] The planetary carrier further comprises a spline sleeve installed in the first mounting hole or the third mounting hole.

[0013] Each second mounting hole corresponds to a fourth mounting hole, and a planetary wheel shaft is installed in the second mounting hole and the fourth mounting hole.

[0014] Preferably, the first bracket and the second bracket are integrally formed.

[0015] A planetary assembly comprises a sun gear, a planetary wheel shaft, a planetary wheel, a ring gear and the planetary carrier.

[0016] The sun gear is installed in the sun gear space.

[0017] The planetary wheel shaft is arranged through the corresponding first body and the second body of the planetary wheel space.

[0018] The planetary wheel is installed on the planetary wheel shaft and meshes with the sun gear.

[0019] The ring gear is sleeved on the planetary carrier and meshes with the planetary wheel.

[0020] A driving system comprises a power source, a power shaft and the planetary assembly.

[0021] The power source is connected to the sun gear of the planetary assembly.

[0022] The power shaft is connected to the planetary carrier of the planetary assembly.

[0023] Preferably, the power source and the sun gear are integrally designed.

[0024] A vehicle comprises the driving system.

[0025] In the above embodiment, the second bracket is connected to a plurality of second support arms, so that the first bracket and the second bracket are matched to form a sun gear space and a plurality of planetary wheel spaces arranged around the periphery of the sun gear space, which facilitates the installation of the sun gear and the planetary wheel. The projection area of the first support arm in the axial direction is smaller than the projection area of the second support arm in the axial direction, so that the support arm of the first bracket is designed in a T shape. Compared with the I-shaped support arm in the prior art, the T-shaped support arm can improve the support rigidity and increase the connection area between the second bracket and the first bracket, thereby enhancing the impact resistance and anti-torsional deformation capacity of the planetary carrier to meet the use requirements. Attached Figure Description

[0026] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is an axonometric view of a planetary carrier in one embodiment of the present invention;

[0028] Figure 2 This is an axonometric view of the first bracket in one embodiment of the present invention;

[0029] Figure 3 This is an axonometric view of the second bracket in one embodiment of the present invention;

[0030] Figure 4 This is a cross-sectional view of a planetary assembly in one embodiment of the present invention.

[0031] The components include: 1. First bracket; 101. Bracket body; 102. First support arm; 103. Second support arm; 2. Second bracket; 21. Mounting groove; 3. Reinforcing rib; 4. Snap-fit ​​groove; 5. Limiting protrusion; 6. First mounting hole; 7. Second mounting hole; 8. Third mounting hole; 9. Fourth mounting hole; 10. Spline sleeve; 11. Planetary gear shaft; 12. Sun gear; 13. Planetary gear; 14. Gear ring; 15. Planetary needle roller; 16. First bearing; 17. Second bearing. Detailed Implementation

[0032] To make the technical problems solved, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0033] In the description of this utility model, it should be understood that the terms "longitudinal," "radial," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0034] In the description of the utility model, it is necessary to explain that, unless there is explicit provision and limitation, the term "installation", "connection", "connection" should be understood broadly, for example, it can be fixed connection, also can be detachable connection, or integrally connected;It can be mechanical connection, or electrical connection;It can be directly connected, or indirectly connected through intermediate medium, it can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above-mentioned terms in the utility model can be understood according to specific circumstances.

[0035] The utility model embodiment provides a kind of planet carrier, refer to Figure 1 、 Figure 2 And Figure 3 The planet carrier includes first support 1 and second support 2;First support 1 includes support main body 101, multiple first support arm 102 extending from the side of support main body 101 in axial direction and second support arm 103 extending from each first support arm 102 in axial direction;The projection area of first support arm 102 in axial direction is less than the projection area of second support arm 103 in axial direction;Second support 2 is connected with multiple second support arm 103.

[0036] Wherein, axial direction is the axial direction of planet carrier.

[0037] As an example, the planet carrier is used to provide support for the planet gears 13 to enable them to rotate around the sun gear 12; the planet carrier includes a first carrier 1 and a second carrier 2. The first carrier 1 includes a carrier main body 101, a plurality of first support arms 102, and a plurality of second support arms 103; the carrier main body 101 is a disc structure, the plurality of first support arms 102 are components extending out from one side of the carrier main body 101 in the axial direction, the plurality of second support arms 103 are respectively components extending out from the plurality of first support arms 102 in the axial direction, and the plurality of first support arms 102 are arranged on the carrier main body 101 in the circumferential direction. The second carrier 2 is a disc structure, and the second carrier 2 is connected to the plurality of second support arms 103, specifically by connecting the outer edge of the second carrier 2 to the inner side wall of the plurality of second support arms 103, so that the first carrier 1 and the second carrier 2 cooperate to form a sun gear space and a plurality of planet gear spaces arranged around the periphery of the sun gear space, which facilitates the installation of the sun gear 12 and the planet gears 13. The projection area of the first support arm 102 in the axial direction is smaller than the projection area of the second support arm 103 in the axial direction, so that the support arm of the first carrier 1 is designed in a T shape. Compared with the I-shaped support arm in the prior art, the T-shaped support arm can not only improve the support rigidity, but also increase the connection area between the second carrier 2 and the first carrier 1, thereby enhancing the impact resistance and anti-torsional deformation capability of the planet carrier to meet the use requirements. In addition, the second carrier 2 and the first carrier 1 are connected by welding or other connection methods, and the planet carrier is composed of two components, the first carrier 1 and the second carrier 2, which are connected together by component welding, thereby reducing the influence of the distortion of the two carriers on the weld.

[0038] In an embodiment, referring to Figure 1 and Figure 3 , the second carrier 2 is provided with a plurality of reinforcing ribs 3; each reinforcing rib 3 is arranged opposite to a second support arm 103.

[0039] As an example, the second carrier 2 is provided with a plurality of reinforcing ribs 3, and the plurality of reinforcing ribs 3 are arranged at intervals in the circumferential direction; each reinforcing rib 3 is arranged opposite to a second support arm 103; in this way, the torsional rigidity of the second carrier 2 can be improved, and the deformation at the joint between the second carrier 2 and the second support arm 103 can be reduced, thereby ensuring the reliability of the planet carrier. The reinforcing rib 3 is specifically a rib, which can be arranged on the end face of the second carrier 2 away from the first carrier 1, or on the end face close to the first carrier 1.

[0040] In an embodiment, referring to Figure 1 and Figure 2 , the inner side wall of the second support arm 103 is provided with a clamping groove 4, and the second carrier 2 is installed in the clamping groove 4.

[0041] As an example, the inner side wall of the second support arm 103 is provided with a clamping groove 4, and the second support 2 is installed in the clamping groove 4; in this way, the clamping groove 4 can provide installation limiting for the second support 2, ensure the stability of the installation of the second support 2, and enhance the impact resistance of the planetary carrier.

[0042] In an embodiment, referring to Figure 1 and Figure 3 , the second support 2 is provided with a plurality of limiting protrusions 5, and an installation groove 21 is formed between adjacent two limiting protrusions 5, and a second support arm 103 is installed in each installation groove 21.

[0043] As an example, the second support 2 is provided with a plurality of limiting protrusions 5, and an installation groove 21 is formed between adjacent two limiting protrusions 5, and a second support arm 103 is installed in each installation groove 21; in this way, the installation groove 21 provides installation limiting for the second support arm 103, makes the installation between the second support 2 and the first support 1 more stable and reliable, and enhances the impact resistance and anti-torsional deformation ability of the planetary carrier.

[0044] In an embodiment, referring to Figure 1 , Figure 2 and Figure 3 , the support body 101 is provided with a first installation hole 6 and a plurality of second installation holes 7 arranged around the periphery of the first installation hole 6, and a second installation hole 7 is arranged between adjacent two first support arms 102; the second support 2 is provided with a third installation hole 8 and a plurality of fourth installation holes 9 arranged around the periphery of the third installation hole 8; the planetary carrier further comprises a spline sleeve 10 installed in the first installation hole 6 or the third installation hole 8; each second installation hole 7 corresponds to a fourth installation hole 9 for installing a planetary wheel shaft 11.

[0045] As an example, the first mounting hole 6 and the plurality of second mounting holes 7 are arranged on the support body 101, the plurality of second mounting holes 7 are arranged around the periphery of the first mounting hole 6, one second mounting hole 7 is arranged between two adjacent first support arms 102, specifically, the first mounting hole 6 corresponds to the sun gear space of the planet carrier, and the second mounting hole 7 corresponds to the planet gear space of the planet carrier; the third mounting hole 8 and the plurality of fourth mounting holes 9 are arranged on the second support 2, the plurality of fourth mounting holes 9 are arranged around the periphery of the third mounting hole 8, specifically, the third mounting hole 8 corresponds to the sun gear space of the planet carrier, and the fourth mounting hole 9 corresponds to the planet gear space of the planet carrier. The planet carrier further comprises a spline sleeve 10; during installation, the spline sleeve 10 is installed in the first mounting hole 6 or the third mounting hole 8, specifically, the spline sleeve 10 is installed in the third mounting hole 8 in a welding manner or other connecting manner, and the sun gear 12 is installed in the sun gear space formed by the first support 1 and the second support 2 through the first mounting hole 6; or the spline sleeve 10 is installed in the first mounting hole 6 in a welding manner or other connecting manner, and the sun gear 12 is installed in the sun gear space formed by the first support 1 and the second support 2 through the third mounting hole 8. Each second mounting hole 7 corresponds to a fourth mounting hole 9 and is used for installing a planet gear shaft 11. In this way, the sun gear 12 is installed in the sun gear space of the planet carrier, connected with the power source and used as a power input end to transmit power; the spline sleeve 10 is connected with the power shaft through spline connection and used as a power output end to transmit power.

[0046] In an embodiment, with reference to Figure 1 、 Figure 2 and Figure 3 , the first support 1 and the second support 2 are integrally formed.

[0047] As an example, the first support 1 and the second support 2 are integrally formed; specifically, the first support 1 is formed by stamping a plate material through a mold, the reinforcing rib 3 (for example, a convex rib) is extruded on the plate material of the second support 2, and the two are connected together by using end face fusion welding technology, so that the connecting surface between the two supports can be enlarged, the support rigidity is improved, and the welding stress is reduced. In addition, the misalignment amount of the mounting holes of the planet gear shaft 11, that is, the second mounting hole 7 and the fourth mounting hole 9, on the two supports can be reduced, and the planet gear shaft 11 is facilitated to be installed. Compared with a cast planet carrier and a forged planet carrier, the planet carrier has a compact structure, a low weight, a high manufacturing feasibility, and a single-piece cost reduction of about 15%-30%, and has considerable economic benefits.

[0048] The embodiment of the utility model provides a kind of planetary assembly, with reference to Figures 1-4, including the sun gear 12, the planet shaft 11, the planet gear 13, the ring gear 14 and the planet carrier; the sun gear 12 is installed in the sun gear space, the planet shaft 11 is arranged in the corresponding first support 1 and the second support 2 of the planet gear space, the planet gear 13 is installed on the planet shaft 11 and engaged with the sun gear 12, and the ring gear 14 is sleeved outside the planet carrier and engaged with the planet gear 13.

[0049] As an example, the planetary assembly includes the sun gear 12, the planet shaft 11, the planet gear 13, the ring gear 14 and the planet carrier; the planet carrier includes the first support 1 and the second support 2. The first support 1 includes the support main body 101, a plurality of first support arms 102 and a plurality of second support arms 103; the support main body 101 is a disc structure, the plurality of first support arms 102 are components extending from one side of the support main body 101 in the axial direction, the plurality of second support arms 103 are respectively components extending from the plurality of first support arms 102 in the axial direction, and the plurality of first support arms 102 are arranged on the support main body 101 in the circumferential direction. The second support 2 is a disc structure, the outer edge of the second support 2 is connected with the inner side wall of the plurality of second support arms 103, so that the first support 1 and the second support 2 are matched to form the sun gear space and a plurality of planet gear spaces arranged around the periphery of the sun gear space, the sun gear 12 is installed in the sun gear space between the first support 1 and the second support 2 of the planet carrier, the planet shaft 11 is arranged in the corresponding first support 1 and the second support 2 of the planet gear space. The planet gear 13 is installed on the planet shaft 11 and engaged with the sun gear 12; the ring gear 14 is sleeved outside the planet carrier and engaged with the planet gear 13; in this way, the ring gear 14 is fixed on the housing of the driving system as a support reference, the sun gear 12 is installed in the sun gear space of the planet carrier and connected with the power source as a power input end to transmit power, the sun gear 12 drives the planet gear 13 to rotate, the planet gear 13 rotates in the ring gear 14 to drive the planet carrier to rotate, the spline sleeve 10 of the planet carrier is connected with the power shaft through the spline to serve as a power output end to transmit power. The planetary assembly further includes the planet roller 15; the planet roller 15 is arranged between the planet gear 13 and the planet shaft 11 to make the rotation of the planet gear 13 more stable and safe. The planetary assembly further includes the first bearing 16 and the second bearing 17; the first bearing 16 is installed at the first end of the planet carrier by interference fit, the second bearing 17 is installed at the second end of the planet carrier by interference fit, and the two bearings cooperate to make the rotation of the planet carrier more stable and safe.

[0050] In the example, the projection area of the first support arm 102 in the axial direction is smaller than the projection area of the second support arm 103 in the axial direction, so that the support arm of the first support 1 is designed in a T shape. Compared with the I-shaped support arm in the prior art, the T-shaped support arm can improve the support rigidity, increase the connection area between the second support 2 and the first support 1, and enhance the impact resistance and anti-torsional deformation capability of the planet carrier to meet the use requirements. In addition, the second support 2 and the first support 1 are connected by welding or other connection methods, the planet carrier is composed of two components of the first support 1 and the second support 2, and the two components are connected together by welding, so that the influence of the torsional deformation of the two supports on the weld is reduced.

[0051] The utility model embodiment provides a kind of drive system, refer to Figures 1-4 , including power source, power shaft and planetary assembly;Power source and the sun gear 12 of planetary assembly are connected;Power shaft and the planet carrier of planetary assembly are connected.

[0052] As an example, the drive system comprises a power source, a power shaft and a planetary assembly, the planetary assembly comprises a sun gear 12, a planetary shaft 11, a planetary gear 13, a ring gear 14 and a planetary carrier; the planetary carrier comprises a first support 1 and a second support 2. The first support 1 comprises a support body 101, a plurality of first support arms 102 and a plurality of second support arms 103; the support body 101 is a disc structure, the plurality of first support arms 102 are components extending out from one side of the support body 101 in the axial direction, the plurality of second support arms 103 are respectively components extending out from the plurality of first support arms 102 in the axial direction, and the plurality of first support arms 102 are arranged on the support body 101 in the circumferential direction. The second support 2 is a disc structure, and the outer edge of the second support 2 is connected with the inner side wall of the plurality of second support arms 103, so that the first support 1 and the second support 2 are matched to form a sun gear space and a plurality of planetary gear spaces arranged around the periphery of the sun gear space. The sun gear 12 is installed between the first support 1 and the second support 2 of the planetary carrier, that is, in the sun gear space, and the planetary shaft 11 is arranged through the corresponding first support 1 and the second support 2 of the planetary gear space. The planetary gear 13 is installed on the planetary shaft 11 and engaged with the sun gear 12; the ring gear 14 is sleeved outside the planetary carrier and engaged with the planetary gear 13; in this way, the ring gear 14 is fixed on the housing of the drive system as a support reference, the sun gear 12 is installed in the sun gear space of the planetary carrier and connected with the power source as a power input end to transmit power, the sun gear 12 drives the planetary gear 13 to rotate, the planetary gear 13 rotates in the ring gear 14 to drive the planetary carrier to rotate, the spline sleeve 10 of the planetary carrier is connected with the power shaft through the spline to serve as a power output end to transmit power. The planetary assembly further comprises planetary rollers 15 arranged between the planetary gear 13 and the planetary shaft 11 to make the rotation of the planetary gear 13 more stable and safe. The planetary assembly further comprises a first bearing 16 and a second bearing 17, the first bearing 16 is installed at the first end of the planetary carrier by interference fit, and the second bearing 17 is installed at the second end of the planetary carrier by interference fit, and the two bearings cooperate to make the rotation of the planetary carrier more stable and safe.

[0053] In the example, the projection area of the first support arm 102 in the axial direction is smaller than the projection area of the second support arm 103 in the axial direction, so that the support arm of the first support 1 is designed in a T shape. Compared with the I-shaped support arm in the prior art, the T-shaped support arm can not only improve the support rigidity, but also increase the connection area between the second support 2 and the first support 1, thereby enhancing the impact resistance and anti-torsional deformation capacity of the planetary carrier to meet the use requirements. In addition, the second support 2 and the first support 1 are connected by welding or other connection methods, the planetary carrier is composed of two components, the first support 1 and the second support 2, which are connected together by component welding, thereby reducing the influence of the distortion of the two supports on the weld.

[0054] In an embodiment, the power source is integrated with the sun gear 12.

[0055] As an example, the power source is a driving motor, and the driving motor is integrated with the sun gear 12, so that the power of the driving motor can be directly input, and power loss is reduced.

[0056] The embodiment of the utility model provides a kind of vehicle, including drive system.

[0057] As an example, the vehicle includes a drive system, which includes a power source, a power shaft and a planetary assembly, the planetary assembly includes a sun gear 12, a planetary gear shaft 11, a planetary gear 13, a ring gear 14 and a planet carrier;The planet carrier includes a first support 1 and a second support 2. The first support 1 includes a support body 101, a plurality of first support arms 102 and a plurality of second support arms 103;The support body 101 is a disc structure, the plurality of first support arms 102 are components extending from one side of the support body 101 in the axial direction, the plurality of second support arms 103 are respectively components extending from the plurality of first support arms 102 in the axial direction, and the plurality of first support arms 102 are arranged on the support body 101 in the circumferential direction. The second support 2 is a disc structure, and the outer edge of the second support 2 is connected with the inner side wall of the plurality of second support arms 103, so that the first support 1 and the second support 2 cooperate to form a sun gear space and a plurality of planetary gear spaces arranged around the periphery of the sun gear space. The sun gear 12 is installed between the first support 1 and the second support 2 of the planet carrier, i.e. in the sun gear space, and the planetary gear shaft 11 is arranged through the corresponding first support 1 and second support 2 of the planetary gear space. The planetary gear 13 is installed on the planetary gear shaft 11 and engages with the sun gear 12;The ring gear 14 is sleeved outside the planet carrier and engages with the planetary gear 13. In this way, the ring gear 14 is fixed on the housing of the drive system as a support reference, the sun gear 12 is installed in the sun gear space of the planet carrier and connected with the power source as a power input end, the power is transmitted, the sun gear 12 drives the planetary gear 13 to rotate, the planetary gear 13 rotates in the ring gear 14 to drive the planet carrier to rotate, the spline sleeve 10 of the planet carrier is connected with the power shaft through the spline, as a power output end, the power is transmitted out. The planetary assembly further includes a planetary needle roller 15, which is arranged between the planetary gear 13 and the planetary gear shaft 11 to make the rotation of the planetary gear 13 more stable and safe. The planetary assembly further includes a first bearing 16 and a second bearing 17, the first bearing 16 is installed at the first end of the planet carrier by interference fit, the second bearing 17 is installed at the second end of the planet carrier by interference fit, and the two bearings cooperate to make the rotation of the planet carrier more stable and safe.

[0058] In the example, the projection area of the first support arm 102 in the axial direction is smaller than the projection area of the second support arm 103 in the axial direction, so that the support arm of the first support 1 is designed in a T shape. The T-shaped support arm can not only improve the support rigidity, but also increase the connection area between the second support 2 and the first support 1, and enhance the impact resistance and anti-torsional deformation capacity of the planet carrier, so as to meet the use requirements. In addition, the second support 2 and the first support 1 are connected by welding or other connection methods, the planet carrier is composed of two components of the first support 1 and the second support 2 by welding, and the two supports are connected together in the form of component welding, so as to reduce the influence of the torsional deformation of the two supports on the weld.

[0059] The above-described embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application.

Claims

1. A planet carrier, characterized in that The first support and the second support are provided. The first support comprises a support body, a plurality of first support arms extending from one side of the support body in an axial direction, and a second support arm extending from each of the first support arms in an axial direction; the projection area of the first support arm in the axial direction is smaller than the projection area of the second support arm in the axial direction; the second support is connected to the plurality of second support arms.

2. The planet carrier of claim 1, wherein A plurality of reinforcing ribs are provided on the second support; each of the reinforcing ribs is arranged opposite to one of the second support arms.

3. The planet carrier of claim 1, wherein A clamping groove is provided on the inner side wall of the second support arm, and the second support is installed in the clamping groove.

4. The planet carrier of claim 1, wherein A plurality of limiting protrusions are provided on the second support, and an installation groove is formed between two adjacent limiting protrusions; one of the second support arms is installed in each of the installation grooves.

5. The planet carrier of claim 1, wherein A first installation hole and a plurality of second installation holes arranged around the periphery of the first installation hole are provided on the support body; one of the second installation holes is arranged between two adjacent first support arms; a third installation hole and a plurality of fourth installation holes arranged around the periphery of the third installation hole are provided on the second support; The planetary carrier further comprises a spline sleeve installed in the first installation hole or the third installation hole. Each of the second installation holes corresponds to one of the fourth installation holes, and is used to install a planetary shaft.

6. The planet carrier of claim 1, wherein The first support and the second support are integrally formed.

7. A planetary assembly characterized by, The planetary assembly comprises a sun gear, a planetary shaft, a planetary gear, a ring gear, and the planetary carrier according to any one of claims 1-6. The sun gear is installed in the sun gear space. The planetary shaft is arranged through the corresponding first body and second body of the planetary gear space. The planetary gear is installed on the planetary shaft and is engaged with the sun gear. The ring gear is sleeved on the outside of the planetary carrier and is engaged with the planetary gear.

8. A drive system characterized by, The planetary assembly comprises a power source, a power shaft, and the planetary assembly according to claim 7. The power source is connected to the sun gear of the planetary assembly. The power shaft is connected to the planetary carrier of the planetary assembly.

9. The drive system of claim 8, wherein, The power source is integrally designed with the sun gear.

10. A vehicle characterized by comprising: The driving system comprises the driving system according to any one of claims 8-9.

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