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 first body and a plurality of first supporting arms extending out of one side of the first body in the axial direction, and the first supporting arms are arranged in the circumferential direction of the first body at intervals. The second support comprises a second main body and a plurality of second supporting arms extending out of one side of the second main body in the axial direction, and the second supporting arms are arranged in the circumferential direction of the second main body at intervals. The end face, in the axial direction, of each first supporting arm is connected with the end face, in the axial direction, of the corresponding second supporting arm. According to the two supports, the protruding supporting arms are arranged on one plate, the two plates are connected through the two supporting arms, the connecting point is located in the area between the two plates, and the torsional deformation resistance is enhanced; the influence of distortion of the two brackets on a welding seam is reduced, so that the supporting rigidity of the planet carrier can be improved.

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 and the components such as sun gear and planet wheel arranged on the planetary carrier, has the advantages such as compact structure, high speed ratio, high transmission efficiency. With the development of driving technology, the upper limit of motor speed is continuously improved, so that the performance of planetary assembly also needs to be improved, and the reliability of planetary assembly as an important component for transmitting motor torque is particularly important. Since the planetary carrier is a key component for transmitting torque in the planetary assembly, it needs to have high torsional deformation resistance and impact resistance, and the existing planetary carrier is generally connected as an integral 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 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 that the torsional deformation resistance and impact resistance of existing planetary carrier are low.

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

[0005] The first support includes a first body, a plurality of first support arms extending from one side of the first body in an axial direction, and the plurality of first support arms are spaced apart along the circumference of the first body.

[0006] The second support includes a second body, a plurality of second support arms extending from one side of the second body in an axial direction, and the plurality of second support arms are spaced apart along the circumference of the second body.

[0007] The end surface of each first support arm in the axial direction is in contact with the end surface of a second support arm in the axial direction.

[0008] Preferably, the size of the first support arm in the radial direction is smaller than the size of the second support arm in the radial direction.

[0009] Preferably, the length of each first support arm in the axial direction is equal to the length of a second support arm in the axial direction.

[0010] Preferably, the central axis of each first support arm in the axial direction coincides with the central axis of a second support arm in the axial direction.

[0011] Preferably, the first support arm comprises a first support part extending from the first body in an axial direction and a first connecting part extending from the first support part in a radial direction;

[0012] The second support arm comprises a second support part extending from the second body in an axial direction and a second connecting part extending from the second support part in a radial direction;

[0013] The first connecting part is connected with the second connecting part.

[0014] Preferably, the first support part comprises a first connecting plate and two second connecting plates extending from two sides of the first connecting plate respectively; the included angle between each second connecting plate and the first connecting plate is obtuse;

[0015] The second support part comprises a third connecting plate and two fourth connecting plates extending from two sides of the third connecting plate respectively; the included angle between each fourth connecting plate and the third connecting plate is obtuse.

[0016] Preferably, the first body is provided with a first mounting hole and a plurality of second mounting holes arranged around the periphery of the first mounting hole, and one second mounting hole is arranged between two adjacent first support arms; the second body is provided with a third mounting hole and a plurality of fourth mounting holes arranged around the periphery of the third mounting hole;

[0017] The planetary carrier further comprises a spline sleeve installed in the first mounting hole or the third mounting hole;

[0018] Each second mounting hole corresponds to a fourth mounting hole for installing a planetary shaft.

[0019] A planetary assembly comprising a sun gear, a planetary shaft, a planetary gear, a ring gear and the planetary carrier;

[0020] The sun gear is installed in the sun gear space;

[0021] The planetary shaft is arranged through the corresponding first body and second body of the planetary gear space;

[0022] The planetary gear is installed on the planetary shaft and engaged with the sun gear;

[0023] The ring gear is sleeved outside the planetary carrier and engaged with the planetary gear.

[0024] A driving system comprising a power source, a power shaft and the planetary assembly;

[0025] The power source is connected with the sun gear of the planetary assembly;

[0026] The power shaft is connected with a planet carrier of the planetary assembly.

[0027] A vehicle comprising the drive system.

[0028] In the above embodiment, the end surface of each first support arm in the axial direction is connected with the end surface of a second support arm in the axial direction, specifically by welding or other means; compared with the existing planet carrier, in the present example, both supports of the planet carrier are provided with protruding support arms on a plate, and the two plates are connected through the two support arms, so that the connection point is located in the region between the two plates, that is, the connection point of the two supports is located in the region between the first main body and the second main body, the anti-torsional deformation capability is enhanced; the influence of the torsional deformation of the two supports on the weld is reduced, so that the support rigidity of the planet carrier can be improved, the impact resistance of the planet carrier is enhanced, and the use requirements can be met. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the following will be briefly introduced the drawings needed to be used in the description of the embodiments of the utility model, obviously, the drawings in the following description are only some embodiments of the utility model, for those skilled in the art, under the premise of not paying the creative labor, other drawings can also be obtained according to these drawings.

[0030] Figure 1 It is the axial side view of the planet carrier in an embodiment of the utility model;

[0031] Figure 2 It is the axial side view of the first support in an embodiment of the utility model;

[0032] Figure 3 It is the axial side view of the second support in an embodiment of the utility model;

[0033] Figure 4 It is the sectional view of the planetary assembly in an embodiment of the utility model.

[0034] Wherein, 1, first support;11, first main body;12, first support arm;121, first support part;1211, first connecting plate;1212, second connecting plate;122, first connecting part;13, first mounting hole;14, second mounting hole;2, second support;21, second main body;22, second support arm;221, second support part;2211, third connecting plate;2212, fourth connecting plate;222, second connecting part;23, third mounting hole;24, fourth mounting hole;3, spline sleeve;4, planetary gear shaft;5, sun gear;6, planetary gear;7, ring gear;8, planetary needle roller;9, first bearing;10, second bearing. DETAILED DESCRIPTION

[0035] In order to make the technical problems, technical schemes and beneficial effects solved by the utility model clearer and more apparent, the utility model will be further described in detail below in combination with the drawings and embodiments.

[0036] In the description of the utility model, it needs to be understood that the orientation or position relationship indicated by the terms "longitudinal", "radial", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is the orientation or position relationship based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model. In the description of the utility model, unless otherwise specified, the meaning of "a plurality of" is two or more than two.

[0037] In the description of the utility model, it needs to be understood that, unless otherwise specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0038] 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 first main body 11, multiple first support arms 12 extending from the side of first main body 11 in axial direction, multiple first support arms 12 are spaced apart along the circumference of first main body 11;Second support 2 includes second main body 21, multiple second support arms 22 extend from the side of second main body 21 in axial direction, multiple second support arms 22 are spaced apart along the circumference of second main body 21;The end face of each first support arm 12 in axial direction is connected with the end face of a second support arm 22 in axial direction.

[0039] Wherein, axial direction is the axial direction of planet carrier, radial direction is the radial direction of planet carrier.

[0040] As an example, the planet carrier is used to provide support for the planet gears 6 to enable them to rotate around the sun gear 5. The existing planet carrier is connected to the left and right plates by a support plate (or integrally formed with one of the plates and connected to the other plate), so that the connection points are located on the left and right plates (the connection points are offset), and stress is concentrated at the connection points. When the planet carrier is subjected to force, the left and right plates are twisted and deformed greatly, and the ability to resist torsional deformation is poor. The planet carrier in this example includes a first support 1 and a second support 2. The first support 1 includes a first main body 11 and a plurality of first support arms 12; the first main body 11 is a disc structure, and the plurality of first support arms 12 are components extending out from one side of the first main body 11 in the axial direction, and are arranged on the first main body 11 in the circumferential direction. The second support 2 includes a second main body 21 and a plurality of second support arms 22; the second main body 21 is a disc structure, and the plurality of second support arms 22 are components extending out from one side of the second main body 21 in the axial direction, and are arranged on the second main body 21 in the circumferential direction. The end face of each first support arm 12 in the axial direction is connected to the end face of a second support arm 22 in the axial direction, specifically by welding or other means; compared with the existing planet carrier, the two supports of the planet carrier in this example are provided with protruding support arms on one plate, and the two plates are connected by the two support arms, so that the connection points are located in the area between the two plates, that is, the connection points of the two supports are located in the area between the first main body 11 and the second main body 21, and the ability to resist torsional deformation is enhanced; the influence of the torsional deformation of the two supports on the weld is reduced, thereby improving the support rigidity of the planet carrier and enhancing the impact resistance of the planet carrier to meet the use requirements. Among them, the plurality of first support arms 12 cooperate with the plurality of second support arms 22 to form an accommodation space for mounting the sun gear 5 and the planet gears 6, so as to install the sun gear 5 and the planet gears 6, and to provide a more compact layout, a simpler structure, a lower cost, and a higher strength planet carrier using limited space.

[0041] In an embodiment, with reference to Figure 1 , Figure 2 and Figure 3 , the size of the first support arm 12 in the radial direction is smaller than the size of the second support arm 22 in the radial direction.

[0042] As an example, the size of the first support arm 12 in the radial direction is smaller than the size of the second support arm 22 in the radial direction, so that the sizes of the support arms of the two supports are different. For the NW planetary assembly, the planet gears 6 are double gears with one large and one small, and the two support arms are set to be one large and one small. The large support arm can increase the rigidity and enhance the impact resistance of the planet carrier, and the small support arm serves as a clearance, and such a shape can achieve the effect of weight reduction and reduce costs.

[0043] In an embodiment, with reference to Figure 1 ,Figure 2 and Figure 3 The length of each first support arm 12 in the axial direction is equal to the length of the second support arm 22 in the axial direction.

[0044] As an example, the length of each first support arm 12 in the axial direction is equal to the length of the second support arm 22 in the axial direction, that is, the connection points of the two supports are centrally located in the region between the first body 11 and the second body 21, so as to increase the anti-torsional deformation capacity of the two supports and improve the impact resistance of the planetary carrier.

[0045] In an embodiment, referring to Figure 1 , Figure 2 and Figure 3 The central axis of each first support arm 12 in the axial direction coincides with the central axis of the second support arm 22 in the axial direction.

[0046] As an example, the central axis of each first support arm 12 in the axial direction coincides with the central axis of the second support arm 22 in the axial direction, that is, the end faces of the two support arms are connected centrally along the axial direction; such arrangement is conducive to ensuring that the connection strength between the two supports is optimal, improving the impact resistance of the planetary carrier, reducing the weight, and thus increasing the anti-torsional deformation capacity of the two supports.

[0047] In an embodiment, referring to Figure 1 , Figure 2 and Figure 3 The first support arm 12 comprises a first support portion 121 extending from the first body 11 in the axial direction and a first connecting portion 122 extending from the first support portion 121 in the radial direction; the second support arm 22 comprises a second support portion 221 extending from the second body 21 in the axial direction and a second connecting portion 222 extending from the second support portion 221 in the radial direction; the first connecting portion 122 is connected to the second connecting portion 222.

[0048] As an example, the first support arm 12 comprises a first support part 121 and a first connecting part 122; the first support part 121 is a component extending out from the first main body 11 in the axial direction, and the first connecting part 122 is a component extending out from the first support part 121 in the radial direction; the first support part 121 and the first connecting part 122 cooperate to form an L-shaped support structure, which improves the structural strength and rigidity of the first support 1 compared with the support plate in the existing planet carrier. The second support arm 22 comprises a second support part 221 and a second connecting part 222; the second support part 221 is a component extending out from the second main body 21 in the axial direction, and the second connecting part 222 is a component extending out from the second support part 221 in the radial direction; the second support part 221 and the second connecting part 222 cooperate to form an L-shaped support structure, which improves the structural strength and rigidity of the second support 2 compared with the support plate in the existing planet carrier. The first connecting part 122 is connected to the second connecting part 222, so that the two L-shaped support structures are connected, and the first support 1 and the second support 2 cooperate to form a sun gear space and a plurality of planet gear spaces for mounting the sun gear 5 and the planet gears 6; the size of the first support arm 12 in the radial direction is smaller than the size of the second support arm 22 in the radial direction, and the sizes of the support arms of the two supports are different. For the NW planet assembly, the planet gears 6 are double gears with one large and one small, and the two support arms are set to be one large and one small. The large support arm can increase the rigidity and enhance the impact resistance of the planet carrier, and the small support arm plays a role of avoiding, and such shape can play a weight reduction effect and reduce the cost.

[0049] In an embodiment, with reference to Figure 1 、 Figure 2 and Figure 3 , the first support part 121 comprises a first connecting plate 1211 and two second connecting plates 1212 extending from both sides of the first connecting plate 1211 respectively; the included angle between each second connecting plate 1212 and the first connecting plate 1211 is obtuse; the second support part 221 comprises a third connecting plate 2211 and two fourth connecting plates 2212 extending from both sides of the third connecting plate 2211 respectively; the included angle between each fourth connecting plate 2212 and the third connecting plate 2211 is obtuse.

[0050] As an example, the first support part 121 comprises a first connecting plate 1211 and two second connecting plates 1212; the two second connecting plates 1212 are respectively components extending out from two sides of the first connecting plate 1211, and the included angle between each second connecting plate 1212 and the first connecting plate 1211 is an obtuse angle; the first connecting plate 1211, the two second connecting plates 1212, the first main body 11 and the first connecting part 122 cooperate to form a trapezoidal support structure, which improves the structural strength and rigidity of the first support 1 compared with the support plate in the existing planet carrier; the second support part 221 comprises a third connecting plate 2211 and two fourth connecting plates 2212; the two fourth connecting plates 2212 are respectively components extending out from two sides of the third connecting plate 2211; the included angle between each fourth connecting plate 2212 and the third connecting plate 2211 is an obtuse angle; the third connecting plate 2211, the two fourth connecting plates 2212, the second main body 21 and the second connecting part 222 cooperate to form a trapezoidal support structure, which improves the structural strength and rigidity of the second support 2 compared with the support plate in the existing planet carrier. In this way, the two trapezoidal support structures are connected, the first support 1 and the second support 2 cooperate to form a sun gear space and a plurality of planet gear spaces for installing the sun gear 5 and the planet gear 6; the size of the first support arm 12 in the radial direction is smaller than the size of the second support arm 22 in the radial direction, and the sizes of the support arms of the two supports are different; for the NW planetary assembly, the planet gear 6 is a double gear with one large and one small, and the two support arms are set to be one large and one small, the large support arm can increase the rigidity and enhance the impact resistance of the planet carrier, and the small support arm plays a role of avoiding, and such shape can play a weight reduction effect and reduce the cost.

[0051] In an embodiment, referring to Figure 1 , Figure 2 and Figure 3 , the first main body 11 is provided with a first mounting hole 13 and a plurality of second mounting holes 14 arranged around the periphery of the first mounting hole 13, and a second mounting hole 14 is arranged between adjacent two first support arms 12; the second main body 21 is provided with a third mounting hole 23 and a plurality of fourth mounting holes 24 arranged around the periphery of the third mounting hole 23; the planet carrier further comprises a spline sleeve 3 installed in the first mounting hole 13 or the third mounting hole 23; each second mounting hole 14 corresponds to a fourth mounting hole 24 for installing a planet gear shaft 4.

[0052] As an example, the first body 11 is provided with a first mounting hole 13 and a plurality of second mounting holes 14, the plurality of second mounting holes 14 are arranged around the periphery of the first mounting hole 13, one second mounting hole 14 is arranged between two adjacent first support arms 12, specifically, the first mounting hole 13 corresponds to the sun gear space of the planetary carrier, and the second mounting hole 14 corresponds to the planet gear space of the planetary carrier; the second body 21 is provided with a third mounting hole 23 and a plurality of fourth mounting holes 24, the plurality of fourth mounting holes 24 are arranged around the periphery of the third mounting hole 23, specifically, the third mounting hole 23 corresponds to the sun gear space of the planetary carrier, and the fourth mounting hole 24 corresponds to the planet gear space of the planetary carrier. The planetary carrier further comprises a spline sleeve 3; during installation, the spline sleeve 3 is installed in the first mounting hole 13 or the third mounting hole 23, specifically, the spline sleeve 3 is installed in the third mounting hole 23 by welding or other connection methods, and the sun gear 5 is installed in the sun gear space formed by the first support 1 and the second support 2 through the first mounting hole 13; or the spline sleeve 3 is installed in the first mounting hole 13 by welding or other connection methods, and the sun gear 5 is installed in the sun gear space formed by the first support 1 and the second support 2 through the third mounting hole 23. Each second mounting hole 14 corresponds to a fourth mounting hole 24 for installing a planet gear shaft 4. In this way, the sun gear 5 is installed in the sun gear space of the planetary carrier and connected to the power source as a power input end to transmit power; the spline sleeve 3 is connected to the power shaft through spline connection as a power output end to transmit power.

[0053] In an embodiment, the first support 1 and the second support 2 are integrally formed structures; specifically, the first support 1 is formed by stamping a plate material through a mold, the second support 2 is formed by stamping a plate material through a mold, and the two supports are connected together by using a centering circumferential welding technology, so as to reduce welding stress concentration, improve the impact resistance of the planetary carrier, and reduce the weight. The first support 1 and the second support 2 are connected in the center, that is, the mounting holes of the planet gear shaft 4 on the two supports are centered, so as to reduce the dislocation amount of the mounting holes of the planet gear shaft 4 on the two supports, that is, the second mounting hole 14 and the fourth mounting hole 24, and provide convenience for installing the planet gear shaft 4. Compared with a cast and forged planetary carrier, the planetary carrier has a compact structure, low weight, high manufacturing feasibility, and a single-piece cost reduction of about 15%-30%, and has considerable economic benefits.

[0054] The embodiment of the utility model provides a kind of planetary assembly, refer to Figures 1-4 , comprising sun gear 5, planet gear shaft 4, planet gear 6, ring gear 7 and planetary carrier;Sun gear 5 is installed in sun gear space, planet gear shaft 4 is arranged in the first support 1 and the second support 2 corresponding to planet gear space;Planet gear 6 is installed on planet gear shaft 4, and is engaged with sun gear 5;Ring gear 7 is sleeved outside planetary carrier, and is engaged with planet gear 6.

[0055] As an example, the planetary assembly comprises a sun gear 5, a planetary wheel shaft 4, a planetary wheel 6, a ring gear 7 and a planetary carrier; the planetary carrier in this example is a NW planetary carrier, specifically comprising a first support 1 and a second support 2. The first support 1 comprises a first main body 11 and a plurality of first support arms 12; the first main body 11 is a disc structure, and the plurality of first support arms 12 are components extending out from one side of the first main body 11 in the axial direction, and are arranged on the first main body 11 in the circumferential direction. The second support 2 comprises a second main body 21 and a plurality of second support arms 22; the second main body 21 is a disc structure, and the plurality of second support arms 22 are components extending out from one side of the second main body 21 in the axial direction, and are arranged on the second main body 21 in the circumferential direction. The end face of each first support arm 12 in the axial direction is connected to the end face of a second support arm 22 in the axial direction, specifically by welding or other means; compared with the existing planetary carrier, both supports of the planetary carrier in this example are provided with protruding support arms on a plate, and the two plates are connected through the two support arms, so that the connection point is located in the region between the two plates, that is, the connection point of the two supports is located in the region between the first main body 11 and the second main body 21, and the resistance to torsional deformation is enhanced; the influence of the torsional deformation of the two supports on the weld is reduced, thereby the supporting rigidity of the planetary carrier can be improved, and the impact resistance of the planetary carrier can be enhanced to meet the use requirements. Among them, the plurality of first support arms 12 are connected to the plurality of second support arms 22 respectively, so that the first support 1 and the second support 2 cooperate to form a sun gear space and a plurality of planetary wheel spaces arranged around the periphery of the sun gear space, the sun gear 5 is installed between the first support 1 and the second support 2 of the planetary carrier, that is, in the sun gear space, the planetary wheel shaft 4 is arranged through the corresponding first support 1 and second support 2 of the planetary wheel space, and a more compact layout, a simpler structure, a lower cost and a higher strength planetary carrier is provided by using limited space. The planetary wheel 6 is installed on the planetary wheel shaft 4 and meshes with the sun gear 5; the planetary wheel 6 is a double planetary wheel, and the two parts of the double planetary wheel correspond to the first support arm 12 of the first support 1 and the second support arm 22 of the second support 2 respectively; the ring gear 7 is sleeved outside the planetary carrier and meshes with the planetary wheel 6; in this way, the ring gear 7 is fixed on the housing of the driving system as a support reference, the sun gear 5 is installed in the sun gear space of the planetary carrier and connected to the power source as a power input end, the power is transmitted, the sun gear 5 drives the planetary wheel 6 to rotate, the planetary wheel 6 rotates in the ring gear 7 to drive the planetary carrier to rotate, the spline sleeve 3 of the planetary carrier is connected with the power shaft through the spline as a power output end, and the power is transmitted out. The planetary assembly further comprises a planetary needle roller 8; the planetary needle roller 8 is arranged between the planetary wheel 6 and the planetary wheel shaft 4, so that the rotation of the planetary wheel 6 is more stable and safe.The planetary assembly further comprises a first bearing 9 and a second bearing 10, the first bearing 9 is installed on the first end of the planet carrier in an interference fit, and the second bearing 10 is installed on the second end of the planet carrier in an interference fit, and the two bearings cooperate to make the rotation of the planet carrier more stable and safe.

[0056] 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 5 of planetary assembly are connected;Power shaft and the planet carrier of planetary assembly are connected.

[0057] As an example, the drive system comprises a power source, a power shaft and a planetary assembly; the planetary assembly comprises a sun gear 5, a planetary shaft 4, a planetary gear 6, a ring gear 7 and a planetary carrier; the planetary carrier in this example is a NW planetary carrier, which specifically comprises a first support 1 and a second support 2. The first support 1 comprises a first main body 11 and a plurality of first support arms 12; the first main body 11 is a disc structure, and the plurality of first support arms 12 are components extending out from one side of the first main body 11 in the axial direction and are arranged on the first main body 11 in the circumferential direction. The second support 2 comprises a second main body 21 and a plurality of second support arms 22; the second main body 21 is a disc structure, and the plurality of second support arms 22 are components extending out from one side of the second main body 21 in the axial direction and are arranged on the second main body 21 in the circumferential direction. The end face of each first support arm 12 in the axial direction is connected to the end face of a second support arm 22 in the axial direction, specifically by welding or other means; compared with the existing planetary carrier, both supports of the planetary carrier in this example are provided with protruding support arms on a plate, and the two plates are connected through the two support arms, so that the connection point is located in the region between the two plates, that is, the connection point of the two supports is located in the region between the first main body 11 and the second main body 21, and the resistance to torsional deformation is enhanced; the influence of the torsional deformation of the two supports on the weld is reduced, so that the support rigidity of the planetary carrier can be improved and the impact resistance of the planetary carrier can be enhanced to meet the use requirements. Among them, the plurality of first support arms 12 are connected to the plurality of second support arms 22 respectively, 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 5 is installed between the first support 1 and the second support 2 of the planetary carrier, that is, in the sun gear space, the planetary shaft 4 is arranged on the corresponding first support 1 and second support 2 of the planetary gear space, and a more compact layout, a simpler structure, a lower cost and a higher strength planetary carrier are provided by using limited space; the end faces of the first support 1 and the second support 2 in the axial direction are connected by welding or other means, the influence of the torsional deformation of the two supports on the weld is reduced, so that the support rigidity of the planetary carrier can be improved and the impact resistance of the planetary carrier can be enhanced to meet the use requirements. The planetary gear 6 is installed on the planetary shaft 4 and engages with the sun gear 5; the planetary gear 6 is a double planetary gear, and the two parts of the double planetary gear correspond to the first support arm 12 of the first support 1 and the second support arm 22 of the second support 2 respectively; the ring gear 7 is sleeved outside the planetary carrier and engages with the planetary gear 6; in this way, the ring gear 7 is fixed on the housing of the drive system as a support reference, the sun gear 5 is installed in the sun gear space of the planetary carrier and connected to the power source as a power input end, the power is transmitted, the sun gear 5 drives the planetary gear 6 to rotate, the planetary gear 6 rotates in the ring gear 7 to drive the planetary carrier to rotate, and the spline sleeve 3 of the planetary carrier is connected to the power shaft through the spline as a power output end to transmit the power.

[0058] The driving system in the example is a coaxial distributed electric driving structure based on an NW planetary carrier, and in the coaxial distributed electric driving limited envelope space, the layout is more compact, the structure is simpler, the cost is lower, and the strength is higher;A distributed electric driving with simple assembly, high processability, good lubrication effect and high structural strength is provided, which improves the miniaturization of the planetary assembly (NW planetary row), reduces the meshing misalignment amount of the planetary gears, improves the NVH performance, and ensures the strength of the planetary carrier and the weld.

[0059] In an embodiment, the power source is designed in an integrated manner with the sun gear 5.

[0060] As an example, the power source adopts a driving motor, and the driving motor is designed in an integrated manner with the sun gear 5, so that the power of the driving motor can be directly input, and power loss is reduced.

[0061] The utility model embodiment provides a kind of vehicle, including driving system.

[0062] As an example, the vehicle comprises a drive system, the drive system comprises a power source, a power shaft and a planetary assembly; the planetary assembly comprises a sun gear 5, a planetary shaft 4, a planetary gear 6, a ring gear 7 and a planetary carrier; the planetary carrier in this example is a NW planetary carrier, specifically comprising a first support 1 and a second support 2. The first support 1 comprises a first main body 11 and a plurality of first support arms 12; the first main body 11 is a disc structure, and the plurality of first support arms 12 are components extending out from one side of the first main body 11 in the axial direction, and are arranged on the first main body 11 in the circumferential direction. The second support 2 comprises a second main body 21 and a plurality of second support arms 22; the second main body 21 is a disc structure, and the plurality of second support arms 22 are components extending out from one side of the second main body 21 in the axial direction, and are arranged on the second main body 21 in the circumferential direction. The end face of each first support arm 12 in the axial direction is connected to the end face of a second support arm 22 in the axial direction, specifically by welding or other means; compared with the existing planetary carrier, both supports of the planetary carrier in this example are provided with protruding support arms on a plate, and the two plates are connected through the two support arms, so that the connection point is located in the area between the two plates, that is, the connection point of the two supports is located in the area between the first main body 11 and the second main body 21, and the anti-torsional deformation capability is enhanced; the influence of the torsional deformation of the two supports on the weld is reduced, so that the support rigidity of the planetary carrier can be improved, and the impact resistance of the planetary carrier can be enhanced to meet the use requirements. Among them, the plurality of first support arms 12 are connected to the plurality of second support arms 22 respectively, 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 5 is installed between the first support 1 and the second support 2 of the planetary carrier, that is, in the sun gear space, the planetary shaft 4 is arranged on the corresponding first support 1 and second support 2 of the planetary gear space, and a more compact layout, a simpler structure, a lower cost and a higher strength planetary carrier is provided by using limited space; the end faces of the first support 1 and the second support 2 in the axial direction are connected by welding or other means, the influence of the torsional deformation of the two supports on the weld is reduced, so that the support rigidity of the planetary carrier can be improved, and the impact resistance of the planetary carrier can be enhanced to meet the use requirements. The planetary gear 6 is installed on the planetary shaft 4 and engages with the sun gear 5; the planetary gear 6 is a double planetary gear, and the two parts of the double planetary gear correspond to the first support arm 12 of the first support 1 and the second support arm 22 of the second support 2 respectively; the ring gear 7 is sleeved outside the planetary carrier and engages with the planetary gear 6; in this way, the ring gear 7 is fixed on the housing of the drive system as a support reference, the sun gear 5 is installed in the sun gear space of the planetary carrier and connected to the power source as a power input end, the power is transmitted, the sun gear 5 drives the planetary gear 6 to rotate, the planetary gear 6 rotates in the ring gear 7 to drive the planetary carrier to rotate, and the spline sleeve 3 of the planetary carrier is connected with the power shaft through spline connection as a power output end to transmit power.

[0063] The driving system in the example is a coaxial distributed electric driving structure based on an NW planetary carrier, which has a more compact layout, a simpler structure, a lower cost, and a higher strength in a limited envelope space of the coaxial distributed electric driving; and provides a distributed electric driving which is simple to assemble, has high processability, good lubrication effect, and high structural strength, improves miniaturization of the planetary assembly (NW planetary row), reduces meshing misalignment of the planetary gears, improves NVH performance, and ensures strength of the planetary carrier and the weld.

[0064] The above-described embodiments are only used to illustrate the technical solutions of the present application, rather than 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 equivalently; 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; The first support comprises a first body, a plurality of first support arms extending from one side of the first body in an axial direction, and the plurality of first support arms are arranged at intervals along the circumference of the first body; The second support comprises a second body, a plurality of second support arms extending from one side of the second body in an axial direction, and the plurality of second support arms are arranged at intervals along the circumference of the second body; An end surface of each of the first support arms in the axial direction is in contact with an end surface of each of the second support arms in the axial direction.

2. The planet carrier of claim 1, wherein The size of the first support arm in the radial direction is smaller than the size of the second support arm in the radial direction.

3. The planet carrier of claim 1, wherein The length of each of the first support arms in the axial direction is equal to the length of each of the second support arms in the axial direction.

4. The planet carrier of claim 1, wherein The central axis of each of the first support arms in the axial direction coincides with the central axis of each of the second support arms in the axial direction.

5. The planet carrier of claim 1, wherein The first support arm comprises a first support part extending from the first body in the axial direction and a first connecting part extending from the first support part in the radial direction; The second support arm comprises a second support part extending from the second body in the axial direction and a second connecting part extending from the second support part in the radial direction; The first connecting part is in contact with the second connecting part.

6. The planet carrier of claim 5, wherein The first support part comprises a first connecting plate and two second connecting plates extending from both sides of the first connecting plate respectively; and the included angle between each of the second connecting plates and the first connecting plate is an obtuse angle. The second support part comprises a third connecting plate and two fourth connecting plates extending from both sides of the third connecting plate respectively; and the included angle between each of the fourth connecting plates and the third connecting plate is an obtuse angle.

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

8. A planetary assembly characterized by, The planetary gear set comprises a sun gear, a planetary shaft, a planetary gear, a ring gear, and the planetary carrier according to any one of claims 1-7; 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 in meshing connection with the sun gear; The ring gear is sleeved on the outside of the planetary carrier and is in meshing connection with the planetary gear.

9. A drive system characterized by, The planetary gear set comprises a power source, a power shaft, and the planetary carrier according to claim 8; The power source is in contact with the sun gear of the planetary gear set; The power shaft is in contact with the planetary carrier of the planetary gear set.

10. A vehicle characterized by comprising: The driving system comprises the driving system according to claim 9.

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