CN219634909U

CN219634909U - Electric drive axle and vehicle

Info

Publication number: CN219634909U
Application number: CN202320544323.1U
Authority: CN
Inventors: 袁浩然; 杨玉龙; 龚丽萍; 付龙; 任广福
Original assignee: Zhejiang Xuanfu Technology Co ltd; Zhejiang Geely Holding Group Co Ltd
Current assignee: Zhejiang Xuanfu Technology Co ltd; Zhejiang Geely Holding Group Co Ltd
Priority date: 2023-03-14
Filing date: 2023-03-14
Publication date: 2023-09-05
Anticipated expiration: 2033-03-14

Abstract

The utility model discloses an electric drive axle and a vehicle, wherein the electric drive axle comprises: the motor is arranged in the motor shell and comprises a stator and a rotor; the compound planetary gear set is arranged in the speed reducer shell, the compound planetary gear set comprises a speed reduction gear set and a differential gear set, the rotor is in power connection with the speed reduction gear set, the speed reduction gear set is in power connection with the differential gear set, the differential gear set is in power connection with a first half shaft and a second half shaft respectively, and the motor shell is detachably connected with the speed reducer shell. The electric drive axle is beneficial to reducing the total weight of the electric drive axle structure, reducing lubricating oil leakage points, improving the rigidity of the whole structure, reducing the load deformation, realizing the separate disassembly and assembly of the motor shell and the reducer shell, further respectively maintaining and maintaining the motor and the reducer, saving time and having better use effect.

Description

Electric drive axle and vehicle

Technical Field

The utility model relates to the technical field of automobile manufacturing, in particular to an electric drive axle and a vehicle with the electric drive axle.

Background

New energy vehicles require the use of an electric drive axle comprising an electric motor, a reduction gear and a differential to drive the vehicle. The electric drive axle is divided into two types, namely a parallel shaft electric drive axle in which a motor and a half shaft connected with wheels are arranged in parallel, and a coaxial electric drive axle in which the motor and the half shaft connected with the wheels are arranged coaxially. In general, a coaxial electric drive axle is powered by an electric motor and transmits the power to a composite planetary gear set connected thereto, and the composite planetary gear set drives a vehicle through a first half shaft and a second half shaft connected thereto. The existing coaxial electric drive axle adopts a three-section type shell design, and consists of a speed reducer shell, a motor main shell and a motor auxiliary shell, wherein the structure weight is large, two shell sealing surfaces exist between the three shells, lubricating oil leakage points are more, and meanwhile, due to the design of multiple connecting positions, the overall rigidity of the coaxial electric drive axle is low, the loaded deformation is large, the reliability of the assembly is reduced, and an improvement space exists.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, an object of the present utility model is to provide an electric drive axle, which has the characteristics of light weight, less leakage points of lubricating oil, high structural rigidity, and the like, and is convenient to disassemble, so as to save maintenance and repair time.

An electric drive axle according to an embodiment of the present utility model includes: the motor is arranged in the motor shell and comprises a stator and a rotor; the compound planetary gear set is arranged in the speed reducer shell, the compound planetary gear set comprises a speed reduction gear set and a differential gear set, the rotor is in power connection with the speed reduction gear set, the speed reduction gear set is in power connection with the differential gear set, the differential gear set is in power connection with a first half shaft and a second half shaft respectively, and the motor shell is detachably connected with the speed reducer shell.

According to the electric drive axle provided by the embodiment of the utility model, the motor shell and the speed reducer shell are respectively arranged for the motor and the speed reducer so as to reduce the total weight of the electric drive axle structure and reduce the leakage point of lubricating oil, meanwhile, the rigidity of the whole structure is improved, the loaded deformation is small, the reliability of the electric drive axle is improved, the motor shell and the speed reducer shell are respectively disassembled and assembled, and further the motor and the speed reducer can be respectively maintained and maintained, so that the time consumption is saved, the application range is wider, and the use effect is better.

According to the electric drive axle of some embodiments of the present utility model, the motor housing is provided with a first motor flange, the reducer housing is provided with a first reducer flange, and the first motor flange is relatively attached to the first reducer flange and detachably connected through a first connecting piece.

According to the electric drive axle of some embodiments of the present utility model, a motor installation cavity for accommodating the motor is formed in the motor casing, a reducer installation cavity for accommodating the compound planetary gear is formed in the reducer casing, a support plate is arranged between the motor installation cavity and the reducer installation cavity, and the support plate is provided with a first motor oil seal for sealing and separating the motor installation cavity from the reducer installation cavity.

According to some embodiments of the utility model, a first differential oil seal is arranged between the speed reducer shell and the differential gear set, and a second differential oil seal is arranged between the rotor and the differential gear set; and/or the stator is fixedly arranged in the motor mounting cavity, the rotor is in a shaft tube shape, one end of the rotor is rotatably supported at the end part of the motor shell, the other end of the rotor is rotatably supported at the supporting plate, and a second motor oil seal is arranged between the motor shell and the rotor.

An electric drive axle according to some embodiments of the present utility model further comprises: the motor comprises a motor shell, a first shaft tube and a second shaft tube, wherein the first shaft tube is detachably connected with one end of the motor shell, deviating from the motor shell, the first shaft tube is sleeved outside a first half shaft, the second shaft tube is detachably connected with one end of the motor shell, deviating from the motor shell, the second shaft tube is sleeved outside a second half shaft, and the first shaft tube and the second shaft tube are suitable for being connected with a frame.

According to some embodiments of the utility model, the reducer casing is provided with a second reducer flange, the first shaft tube is provided with a first connecting flange, and the second reducer flange is relatively attached to the first connecting flange and is detachably connected through a second connecting piece; the motor casing is equipped with the second motor flange, the second shaft pipe is equipped with the second flange, the second motor flange with the relative laminating of second flange just links to each other through third connecting piece detachably.

An electric drive axle according to some embodiments of the present utility model further comprises: the planetary carrier is rotatably arranged in the speed reducer shell, the differential gear set and the compound planetary row are respectively arranged on two sides of the planetary carrier, and the differential gear set and the compound planetary row are coaxially arranged.

According to some embodiments of the utility model, the composite planetary gear comprises a sun gear, a composite planetary gear and a gear ring, wherein the gear ring is fixedly arranged in the speed reducer shell, the sun gear is connected with the rotor, and the composite planetary gear is rotatably connected with the planetary carrier; the compound planetary gear comprises a first planetary gear and a second planetary gear, the first planetary gear and the second planetary gear are coaxially and fixedly connected, the radial size of the first planetary gear is larger than that of the second planetary gear, the first planetary gear is meshed with the sun gear for transmission, and the second planetary gear is meshed with the gear ring for transmission.

According to some embodiments of the present utility model, the differential gear set includes a plurality of differential gears distributed around a rotation axis of the differential gears, the differential gears are rotatably mounted to the planet carrier, and two side gears fixedly connected to the first and second half shafts, respectively, and the two side gears are oppositely mounted to be engaged with two radial sides of the differential gears, respectively.

The utility model further provides a vehicle.

According to the vehicle of the embodiment of the utility model, the electric drive axle of any one of the above is provided.

The advantages of the vehicle and the electric drive axle described above with respect to the prior art are the same and are not described in detail here.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

FIG. 1 is a cross-sectional view of an electric drive axle according to an embodiment of the present utility model;

FIG. 2 is a second cross-sectional view of an electric drive axle according to an embodiment of the present utility model;

FIG. 3 is a cross-sectional view of a compound planetary row according to an embodiment of the utility model;

fig. 4 is a schematic structural view of a compound planetary row according to an embodiment of the present utility model.

Reference numerals:

the electric drive axle 100 is configured to drive the vehicle,

the motor 1, the stator 11, the rotor 12, the motor housing 2, the first motor flange 21, the second motor flange 22, the motor mounting cavity 23, the motor cover plate 24, the motor cover plate mounting seat 25, the connecting piece 26,

compound planetary gear set 3, reduction gear set 31, sun gear 311, compound planet 312, first planet gear 3121, first planet gear spacer 3122, second planet gear 3123, second planet gear spacer 3124, compound planet gear bearing 3125, compound planet pin 3126, compound planet carrier 3127, ring gear 313, differential gear set 32, differential gear 321, differential gear spacer 3211, differential gear carrier 3212, side gear 322, side gear spacer 3221, side gear carrier 3222, side gear cover 3223, second differential oil seal 3224,

the speed reducer housing 4, the first speed reducer flange 41, the first connecting piece 42, the second speed reducer flange 43, the speed reducer mounting cavity 44, the support plate 45, the first motor oil seal 46,

the first half shaft 5, the second half shaft 6, the first shaft tube 7, the first connecting flange 71, the second connecting member 72, the second shaft tube 8, the second connecting flange 81, the third connecting member 82,

the planetary gear set comprises a planetary carrier 9, a first motor bearing 91, a first motor bearing seat 911, a second motor bearing 92, a second motor bearing seat 921, a first speed reducer bearing 93, a first speed reducer bearing seat 931, a second speed reducer bearing 94, a second speed reducer bearing seat 941, a limit sleeve 95, a second motor oil seal 96, a first differential oil seal 97 and a planetary carrier support 98.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

An electric drive axle 100 according to an embodiment of the present utility model is described below with reference to fig. 1-4, which has the characteristics of light weight, less leakage of lubricating oil, high structural rigidity, and the like.

As shown in fig. 1 to 4, an electric drive axle 100 according to an embodiment of the present utility model includes: a motor 1, a motor housing 2, a compound planetary gear set 3 and a reducer housing 4.

The motor 1 is installed in the motor casing 2, and the motor 1 includes stator 11 and rotor 12, and compound planet row 3 is installed in reduction gear casing 4, and compound planet row 3 includes reduction gear set 31 and differential gear set 32, and rotor 12 and reduction gear set 31 power connection, reduction gear set 31 and differential gear set 32 power connection, differential gear set 32 respectively with first semi-axis 5 and second semi-axis 6 power connection, motor casing 2 and reduction gear casing 4 detachably link to each other.

In this embodiment, the casing portion of the electric drive axle 100 is composed of two main components of a motor casing 2 and a reducer casing 4, the motor casing 2 and the reducer casing 4 are respectively detachable, the outside of the motor 1 is a cylindrical stator 11, the stator 11 is fixedly connected to the inner wall of the motor casing 2 in a bolt connection or interference connection manner, a rotor 12 coaxial with the stator 11 is arranged at the center of the motor 1, a first motor bearing 91 and a second motor bearing 92 are respectively mounted at two ends of the rotor 12 through a first motor bearing seat 911 and a second motor bearing seat 921 so as to axially and radially position the rotor 12, and a first reducer bearing 93 and a second reducer bearing 94 are respectively mounted at two ends of the compound planetary row 3 through a first reducer bearing seat 931 and a second reducer bearing seat 941 so as to axially and radially position the compound planetary row 3.

When the vehicle works, the motor 1 generates power, the rotor 12 is in power connection with the reduction gear set 31, the reduction gear set 31 is in power connection with the differential gear set 32, and the differential gear set 32 is in power connection with the first half shaft 5 and the second half shaft 6 respectively, so that the motor 1 can transmit the power to the first half shaft 5 and the second half shaft 6 through the compound planetary gear set 3 so as to drive the vehicle to run.

According to the electric drive axle 100 provided by the embodiment of the utility model, the motor shell 2 and the speed reducer shell 4 are respectively arranged on the motor 1 and the speed reducer so as to reduce the total weight of the electric drive axle 100, reduce the leakage point of lubricating oil, improve the rigidity of the whole structure, reduce the load deformation, improve the reliability of the electric drive axle 100, realize the respective disassembly and assembly of the motor shell 2 and the speed reducer shell 4, further respectively maintain and repair the motor 1 and the speed reducer, save time, and have the advantages of wider application range and better use effect.

In some embodiments, as shown in fig. 2, the motor housing 2 is provided with a first motor flange 21, the reducer housing 4 is provided with a first reducer flange 41, and the first motor flange 21 is relatively fitted to the first reducer flange 41 and detachably connected by a first connector 42.

Specifically, the motor casing 2 is coaxially provided with the first motor flange 21 near one end of the speed reducer, the first motor flange 21 and the motor casing 2 are manufactured in an integrated manner, the speed reducer casing 4 is coaxially provided with the first speed reducer flange 41 near one end of the motor 1, the first speed reducer flange 41 and the speed reducer casing 4 are manufactured in an integrated manner, the connection surface of the first motor flange 21 and the first speed reducer flange 41 is relatively attached, the first motor flange 21 and the first speed reducer flange 41 are connected through the first connecting piece 42, the first connecting piece 42 can be set into bolts and the like, the motor casing 2 and the speed reducer casing 4 are connected through the first motor flange 21 and the first speed reducer flange 41, so that only one sealing surface is formed, the possibility of lubricating oil leakage is reduced, meanwhile, the rigidity of the casing is good, the deformation after the loading of the casing is reduced, the whole reliability of the electric drive axle 100 is improved, the motor casing 2 and the speed reducer casing 4 are connected together through the first motor flange 21 and the first speed reducer flange 41, the motor casing 2 can be conveniently maintained, the maintenance time is saved, and the like.

Meanwhile, one end of the motor casing 2, which is axially far away from the speed reducer, is coaxially provided with a motor cover plate mounting seat 25, the outer side of the motor cover plate mounting seat 25 is matched with a mounting spigot arranged on the inner side of the motor cover plate 24, and the motor cover plate mounting seat are fixedly connected together through a connecting piece 26, and the connecting piece 26 can be provided as a bolt and the like.

In some embodiments, as shown in fig. 2, a motor mounting cavity 23 for accommodating the motor 1 is formed in the motor casing 2, a reducer mounting cavity 44 for accommodating the compound planetary gear set 3 is formed in the reducer casing 4, a support plate 45 is disposed between the motor mounting cavity 23 and the reducer mounting cavity 44, and the support plate 45 is provided with a first motor oil seal 46 for sealing the motor mounting cavity 23 from the reducer mounting cavity 44.

Specifically, a supporting plate 45 mounting seat is arranged between the motor mounting cavity 23 and the speed reducer mounting cavity 44, namely, a supporting plate 45 mounting seat is coaxially arranged between the first motor flange 21 and the first speed reducer flange 41, the supporting plate 45 is coaxially arranged on the supporting plate 45 mounting seat, the supporting plate 45 is fixedly connected with the motor casing 2 through a connecting piece 26 such as a bolt, meanwhile, a first motor oil seal 46 mounting seat, a first motor bearing seat 911 and a first speed reducer bearing seat 931 are coaxially arranged in sequence from one side close to the motor 1 to one side close to the speed reducer in the axial center of the supporting plate 45, the first motor oil seal 46 is arranged on the first motor oil seal 46 mounting seat and matched with the outer diameter of the rotor 12, and the sealed motor mounting cavity 23 is close to one end at the inner side and forms a sealed motor mounting cavity 23 together with the first motor oil seal 46.

And the first motor bearing 91 is coaxially installed in the first motor bearing seat 911, the first motor bearing 91 can position one end of the rotor 12 close to the speed reducer, the first speed reducer bearing 93 is coaxially installed in the first speed reducer bearing seat 931, the first speed reducer bearing 93 can position one end of the composite planetary row 3 close to the motor 1, and the rotor 12 and the composite planetary row 3 can be respectively positioned in the axial direction through the first motor bearing 91 and the first speed reducer bearing 93, so that the stability of the internal structure is ensured.

In some embodiments, a first differential oil seal 97 is provided between the reduction housing 4 and the differential gear set 31, and a second differential oil seal 3224 is provided between the rotor 12 and the differential gear set 31; and/or, the stator 11 is fixedly installed in the motor installation cavity 23, the rotor 12 is configured as a shaft tube, one end of the rotor 12 is rotatably supported at the end of the motor casing 2, the other end of the rotor 12 is rotatably supported at the support plate 45, and a second motor oil seal 96 is arranged between the motor casing 2 and the rotor 12.

That is, a first differential oil seal 97 is provided between the speed reducer case 4 and the differential gear set 31, a second differential oil seal 3224 is provided between the rotor 12 and the differential gear set 31, and at the same time, the stator 11 is fixedly installed in the motor installation cavity 23, the rotor 12 is configured in a shaft tube shape, one end of the rotor 12 is rotatably supported at the end of the motor case 2, the other end of the rotor 12 is rotatably supported at the support plate 45, a second motor oil seal 96 is provided between the motor case 2 and the rotor 12, or, a first differential oil seal 97 is provided only between the speed reducer case 4 and the differential gear set 31, a second differential oil seal 3224 is provided between the rotor 12 and the differential gear set 31, or only the stator 11 is fixedly installed in the motor installation cavity 23, the rotor 12 is configured in a shaft tube shape, one end of the rotor 12 is rotatably supported at the end of the motor case 2, the other end of the rotor 12 is rotatably supported at the support plate 45, and a second motor oil seal 96 is provided between the motor case 2 and the rotor 12.

Specifically, the stator 11 is fixedly installed in the motor installation cavity 23, the center of the motor 1 is provided with a rotor 12 coaxial with the stator 11, the rotor 12 is configured as a shaft tube, one end of the rotor 12 is rotatably supported at the end part of the motor casing 2 far away from one end of the speed reducer, the other end is rotatably supported at the supporting plate 45 and at least partially extends into the speed reducer installation cavity 44 to be in power connection with the speed reduction gear set 31, the two ends of the rotor 12 are respectively provided with a first motor bearing 91 and a second motor bearing 92 through a first motor bearing seat 911 and a second motor bearing seat 921 to axially and radially locate the rotor 12, one end of the speed reducer far away from the motor 1 is provided with a first differential oil seal 97, the two half-shaft gear blanking covers 3223, the two second differential oil seals 3224, the first differential oil seal 97 and the first motor oil seal 46 jointly form a closed speed reducer installation cavity 44, the speed reducer installation cavity 44 is isolated from the motor installation cavity 23 and the outside, external impurities are prevented from entering the speed reducer, the speed reducer lubricating oil is polluted, the reliability of the speed reducer gears and the bearings and the oil seals are not easy to generate oil leakage and failure problems and the like,

meanwhile, a second motor oil seal 96 is axially arranged on the inner side of the motor cover plate 24 close to the motor shell 2, the second motor oil seal 96 is matched with one end of the rotor 12 far away from the speed reducer so as to seal leakage of one end of the motor shell 2 far away from the speed reducer, and the first motor oil seal 46 is arranged on a first motor oil seal 46 mounting seat and matched with the outer diameter of the rotor 12, meanwhile, the first motor oil seal 46 is sealed and sleeved outside the rotor 12 so as to seal one end of the motor mounting cavity 23 close to the speed reducer, and the first motor oil seal 46 and the stator 11 together form a sealed motor mounting cavity 23 so as to prevent external impurities and water vapor from entering.

The first differential oil seal 97, the second differential oil seal 3224 and the first motor oil seal 46 enable an independent cavity isolated from the atmosphere to be formed in the speed reducer shell 4, the cleanliness of lubricating oil in the cavity is not influenced by the outside, such as impurities on a half shaft and in a shaft tube, meanwhile, the performance of the oil seal is little influenced by the jumping of the half shaft, and the lubricating oil is not easy to leak from the oil seal, so that the reliability of related gears, bearings and oil seals is improved.

In some embodiments, as shown in fig. 1, the electric drive axle further comprises: a first shaft tube 7 and a second shaft tube 8.

The first shaft tube 7 is detachably connected with one end of the speed reducer shell 4, which is away from the motor shell 2, and the first shaft tube 7 is sleeved outside the first half shaft 5, the second shaft tube 8 is detachably connected with one end of the motor shell 2, which is away from the speed reducer shell 4, and the second shaft tube 8 is sleeved outside the second half shaft 6, and the first shaft tube 7 and the second shaft tube 8 are suitable for being connected with a frame.

Specifically, the first axle tube 7 and the second axle tube 8 are coaxially provided with the first half axle 5 and the second half axle 6, the first axle tube 7 and the second axle tube 8 are suitable for being connected with a frame, namely, the first axle tube 7 is sleeved outside the first half axle 5, the second axle tube 8 is sleeved outside the second half axle 6, the first axle tube 7 and the second axle tube 8 are coaxial with the coaxial electric drive axle 100, meanwhile, the first axle tube 7 is detachably connected with one end of the speed reducer shell 4, which is away from the motor shell 2, the second axle tube 8 is detachably connected with one end of the motor shell 2, which is away from the speed reducer shell 4, the connection mode is convenient for the disassembly of the electric drive axle 100, one inner ends of the first half axle 5 and the second half axle 6 are respectively connected with the compound planetary row 3 in the electric drive axle 100 through external splines, the motor 1 transmits power to the compound planetary row 3, and then the power is transmitted to wheels on two sides of a vehicle through the first half axle 5 and the second half axle 6, thereby driving the wheels, meanwhile, the first axle tube 7 and the second axle tube 8 can be directly connected with the frame of the vehicle through elastic elements such as, so as to protect the first half axle 5 and the second half axle 6, and the safety of the vehicle can be guaranteed, and the reliability of the first half axle 5 and the safety of the second half axle 6 can be improved.

The electric drive axle is connected with a first axle tube 7 and a second axle tube 8, i.e. in an integral bridge form, as shown in fig. 1, and is not connected with the first axle tube 7 and the second axle tube 8, i.e. in a non-integral bridge form, and the two types of electric drive axles are respectively in two embodiments, and are applicable to different vehicles so as to further meet different requirements.

In some embodiments, as shown in fig. 1, the reducer casing 4 is provided with a second reducer flange 43, the first shaft tube 7 is provided with a first connection flange 71, the second reducer flange 43 is relatively fitted with the first connection flange 71 and detachably connected by a second connection member 72, the motor casing 2 is provided with a second motor flange 22, the second shaft tube 8 is provided with a second connection flange 81, and the second motor flange 22 is relatively fitted with the second connection flange 81 and detachably connected by a third connection member 82.

Specifically, the end of the reducer casing 4, which is axially far from the motor 1, is coaxially provided with a second reducer flange 43, the second reducer flange 43 and the reducer casing 4 are manufactured in an integral manner, one end of the first shaft tube 7, which is close to the reducer, is provided with a first connecting flange 71, the first connecting flange 71 and the first shaft tube 7 can be manufactured in an integral manner or manufactured separately, the end of the motor casing 2, which is axially far from the reducer, is coaxially provided with a second motor flange 22, the second motor flange 22 and the motor casing 2 are manufactured in an integral manner, one end of the second shaft tube 8, which is close to the motor 1, is provided with a second connecting flange 81, the second connecting flange 81 and the second shaft tube 8 can be manufactured in an integral manner or manufactured separately, the connecting surfaces between the first connecting flange 71 and the second reducer flange 43 and the second connecting flange 81 and the second motor flange 22 are relatively attached, the first connecting flange 71 and the second reducer flange 43 are connected through a second connecting piece 72, the second connecting flange 81 and the second motor flange 22 are connected through a third connecting piece 82, the second connecting piece 82 and the third connecting piece 82 can be provided as bolts or the like.

The above connection mode further increases the tightness between the reducer shell 4 and the motor shell 2 and the outside of the bridge body of the electric drive axle 100, reduces the possibility of lubricating oil leakage, simultaneously has good rigidity, reduces the deformation of the shell after loading, improves the reliability of the whole electric drive axle 100, and ensures that the first shaft tube 7 is detachably connected with the reducer shell 4 and the second shaft tube 8 and the motor shell 2 through the connecting piece 26, thereby being convenient for maintenance, disassembly and the like, and saving the maintenance time.

In some embodiments, as shown in fig. 3, electric drive axle 100 further includes: a planet carrier 9.

Specifically, in the present embodiment, the planet carrier 9 is configured as an integral cage structure, the planet carrier 9 is rotatably mounted in the reducer casing 4, the differential gear set 32 and the compound planet row 3 are respectively mounted on two sides of the planet carrier 9, and the differential gear set 32 and the compound planet row 3 are coaxially arranged, the compound planet row 3 is composed of the planet carrier 9, the reduction gear set 31, the differential gear set 32, and first reducer bearings 93 and second reducer bearings 94 coaxially mounted on two ends of the planet carrier 9, and the planet carrier posts 98 are disposed in the planet carrier 9, the planet carrier posts 98 are distributed along the circumferential direction, and may be uniformly distributed or non-uniformly distributed, and are disposed at one end of the planet carrier 9 close to the second reducer bearing seat 941, and support and positioning are provided for the compound planet row 3 through the planet carrier 9, so that the compound planet row 3 can operate in the reducer mounting cavity 44.

In some embodiments, as shown in fig. 3-4, the compound planetary gear row 3 includes a sun gear 311, a compound planetary gear 312, and a ring gear 313, the ring gear 313 is fixedly mounted in the reducer housing 4, the sun gear 311 is connected to the rotor 12, and the compound planetary gear 312 is rotatably connected to the planet carrier 9; the composite planet gear 312 includes a first planet gear 3121 and a second planet gear 3123, the first planet gear 3121 and the second planet gear 3123 are coaxially connected, the radial dimension of the first planet gear 3121 is larger than the radial dimension of the second planet gear 3123, the first planet gear 3121 is meshed with the sun gear 311 for transmission, and the second planet gear 3123 is meshed with the ring gear 313 for transmission.

Specifically, the sun gear 311 is arranged on one side of the compound planetary row 3, which is axially close to the motor 1, one end of the rotor 12, which is close to the speed reducer, is fixedly connected with the sun gear 311 arranged along the axis of the compound planetary row 3, the connection mode can adopt a unthreaded hole interference connection or spline connection mode, a check ring groove is arranged on one side of the sun gear 311, which is far away from the motor 1, a sun gear check ring is arranged in the check ring groove, and the sun gear check ring can limit the axial movement of the sun gear 311 on the rotor 12 together with a limit sleeve 95 arranged on the rotor 12, which is close to one side of the motor 1, of the sun gear 311, so that the running stability is ensured.

Further, disc-shaped composite planet wheel mounting seats 3127 are respectively arranged on two sides of the composite planet wheels 312, the plurality of composite planet wheels 312 are assembled with the planet carrier support posts 98 at intervals in the circumferential direction, and the same number as the planet carrier support posts 98, composite planet wheel gaskets are respectively and coaxially arranged on two axial end faces of the composite planet wheels 312, so that abrasion on the end faces of the composite planet wheel mounting seats 3127 when the composite planet wheels 312 rotate is reduced, meanwhile, the composite planet wheels 312 are axially supported, one or more composite planet wheel gaskets can be respectively and coaxially arranged on two sides of the composite planet wheels 312, the composite planet wheel mounting seats 3127 are coaxially provided with the same number of composite planet wheel pin shaft holes along the circumferential direction, composite planet wheel pin shafts 3126 are coaxially pressed in each composite planet wheel pin shaft hole, composite planet wheel bearings 3125 are coaxially arranged on the outer circumferential surfaces of the composite planet wheel pin shafts 3126, and the outer sides of the composite planet wheel bearings 3125 are matched with the composite planet wheel inner holes, so as to radially support the composite planet wheels 312.

Meanwhile, the gear ring 313 is fixedly installed in the reducer casing 4, external spline teeth are arranged on the radial outer side of the gear ring 313, internal spline teeth are arranged on the inner wall of the reducer casing 4 in the middle of the axial direction, check ring grooves are formed in the middle of the inner side of the internal spline teeth in the axial direction, the internal spline teeth are matched with external spline teeth arranged on the radial outer side of the gear ring 313 of the compound planetary gear row 3 to fix the gear ring 313 to prevent rotation, gear ring 313 check rings are installed in the check ring grooves, and meanwhile, the gear ring 313 check rings are matched with check ring grooves formed in the middle of the external spline teeth of the teeth to fix the gear ring 313 to prevent axial movement.

The composite planet wheel 312 is rotatably connected with the planet carrier 9, and the composite planet wheel 312 is composed of a first planet gear 3121 and a second planet gear 3123 which are coaxially arranged, the first planet gear 3121 and the second planet gear 3123 are coaxially fixedly connected, that is, the first planet gear 3121 and the second planet gear 3123 can be manufactured by using an integral molding process, or in an interference connection through a shaft hole, and can be connected into a whole by welding, wherein the radial dimension of the first planet gear 3121 is larger than the radial dimension of the second planet gear 3123, and the composite planet wheel 312 can be provided in plurality, so that the first planet gear 3121 of the plurality of composite planet wheels 312 simultaneously meshes with the sun gear 311 for transmission, and the second planet gear 3123 of the plurality of composite planet wheels 312 simultaneously meshes with the gear ring 313 for transmission.

Meanwhile, the first planetary gear spacer 3122 and the second planetary gear spacer 3124 are coaxially installed on the axial two end surfaces of the composite planetary gear 312, so as to reduce the abrasion of the end surfaces of the composite planetary gear mounting seat 3127 when the first planetary gear 3121 and the second planetary gear 3123 rotate, and simultaneously axially support the first planetary gear 3121 and the second planetary gear 3123.

In some embodiments, as shown in fig. 3-4, the differential gear set 32 includes a plurality of differential gears 321 and two side gears 322, the plurality of differential gears 321 are distributed around the rotation axis of the side gears 322, the differential gears 321 are rotatably mounted on the planet carrier 9, the two side gears 322 are fixedly connected with the first half shaft 5 and the second half shaft 6, respectively, and the two side gears 322 are oppositely mounted and meshed with two radial sides of the plurality of differential gears 321, respectively.

Specifically, the differential housing portion of the planet carrier is provided with two side gear mounting seats 3222 axially and oppositely from the side close to the motor 1, two side gears 322 are coaxially mounted in the two side gear mounting seats 3222 respectively, and the two side gears 322 are further provided with side gear gaskets 3221, the side gear gaskets 3221 can prevent the end faces of the side gear mounting seats 3222 from being worn during rotation of the side gears 322, and can simultaneously support and position the side gears 322 axially and radially, wherein the two side gears 322 are bevel gears, have the same tooth number and gear parameters, and inner splines are coaxially arranged at positions, axially close to the side gear mounting seats 3222, of the two side gears 322 and can be respectively connected with outer splines, which are arranged at one ends, close to the speed reducer, of the first side shaft 5 and one ends, far from the motor 1, of the second side shaft 6, so as to transmit power to wheels connected with the first side shaft 5 and the second side shaft 6, and drive the vehicle to run.

Simultaneously, two side gears 322 are axially far away from the side gear mounting seat 3222 and are coaxially provided with a side gear blanking cover 3223, and the side gear 322 close to one side of the motor 1 is axially provided with a second differential oil seal 3224, an inner lip of the second differential oil seal 3224 is matched with one end of the rotor 12 close to the speed reducer in an outer diameter mode, one end of the speed reducer far away from the motor 1 is provided with a first differential oil seal 97, the two side gear blanking covers 3223, the two second differential oil seals 3224, the first differential oil seal 97 and the first motor oil seal 46 jointly form a closed speed reducer mounting cavity 44, so that the speed reducer mounting cavity 44 is isolated from the motor mounting cavity 23 and the outside, external impurities are prevented from entering the speed reducer, speed reducer lubricating oil is polluted, the reliability of a speed reducer bearing and the oil seal is good, and the problems of gear, bearing failure, oil seal oil leakage and the like are difficult to generate.

Further, two differential gear mounting seats 3212 with axes perpendicular to the axis of the compound planetary row 3 are arranged in the differential shell relatively, the inner surfaces of the two differential gear mounting seats 3212 are spherical, a differential gear gasket 3211 and a differential gear 321 which are spherical are sequentially arranged from outside to inside, the two differential gears 321 are bevel gears, and the number of teeth and the gear parameters are the same.

The utility model further provides a vehicle.

According to the vehicle of the embodiment of the utility model, the electric transaxle 100 of any one of the above is provided.

According to the vehicle provided by the embodiment of the utility model, the electric drive axle 100 is arranged, and the motor casing 2 and the speed reducer casing 4 are respectively arranged on the motor 1 and the speed reducer of the electric drive axle 100, so that the total structural weight of the electric drive axle 100 is reduced, the leakage point of lubricating oil is reduced, meanwhile, the rigidity of the whole structure is improved, the loaded deformation is small, the reliability of the electric drive axle 100 is improved, the application range is wider, and the use effect is better.

1. In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

2. In the description of the utility model, a "first feature" or "second feature" may include one or more of such features.

3. In the description of the present utility model, "plurality" means two or more.

4. In the description of the utility model, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, and may also include the first and second features not being in direct contact but being in contact with each other by another feature therebetween.

5. In the description of the utility model, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.

Claims

1. An electric drive axle, comprising:

the motor is arranged in the motor shell and comprises a stator and a rotor;

the compound planetary gear set is arranged in the speed reducer shell, the compound planetary gear set comprises a speed reduction gear set and a differential gear set, the rotor is in power connection with the speed reduction gear set, the speed reduction gear set is in power connection with the differential gear set, the differential gear set is in power connection with a first half shaft and a second half shaft respectively, and the motor shell is detachably connected with the speed reducer shell.

2. The electric drive axle of claim 1, wherein the motor housing is provided with a first motor flange and the reducer housing is provided with a first reducer flange, the first motor flange being relatively flush with the first reducer flange and being detachably connected by a first connector.

3. The electric drive axle of claim 1, wherein a motor mounting cavity is formed in the motor housing for receiving the motor, a reducer mounting cavity is formed in the reducer housing for receiving the compound planetary gear set, a support plate is disposed between the motor mounting cavity and the reducer mounting cavity, and a first motor oil seal is disposed on the support plate for sealing the motor mounting cavity from the reducer mounting cavity.

4. The electric drive axle of claim 3 wherein a first differential oil seal is provided between the reducer housing and the differential gear set and a second differential oil seal is provided between the rotor and the differential gear set;

and/or the stator is fixedly arranged in the motor mounting cavity, the rotor is in a shaft tube shape, one end of the rotor is rotatably supported at the end part of the motor shell, the other end of the rotor is rotatably supported at the supporting plate, and a second motor oil seal is arranged between the motor shell and the rotor.

5. The electric drive axle of claim 1, further comprising: the motor comprises a motor shell, a first shaft tube and a second shaft tube, wherein the first shaft tube is detachably connected with one end of the motor shell, deviating from the motor shell, the first shaft tube is sleeved outside a first half shaft, the second shaft tube is detachably connected with one end of the motor shell, deviating from the motor shell, the second shaft tube is sleeved outside a second half shaft, and the first shaft tube and the second shaft tube are suitable for being connected with a frame.

6. The electric drive axle of claim 5, wherein the motor is configured to drive the motor,

the speed reducer shell is provided with a second speed reducer flange, the first shaft tube is provided with a first connecting flange, and the second speed reducer flange is relatively attached to the first connecting flange and detachably connected with the first connecting flange through a second connecting piece;

the motor casing is equipped with the second motor flange, the second shaft pipe is equipped with the second flange, the second motor flange with the relative laminating of second flange just links to each other through third connecting piece detachably.

7. The electric drive axle of claim 1, further comprising: the planetary carrier is rotatably arranged in the speed reducer shell, the differential gear set and the compound planetary row are respectively arranged on two sides of the planetary carrier, and the differential gear set and the compound planetary row are coaxially arranged.

8. The electric drive axle of claim 7, wherein the compound planetary gear set comprises a sun gear, compound planet gears, and a ring gear, the ring gear being fixedly mounted within the reducer housing, the sun gear being coupled to the rotor, the compound planet gears being rotatably coupled to the planet carrier;

the compound planetary gear comprises a first planetary gear and a second planetary gear, the first planetary gear and the second planetary gear are coaxially and fixedly connected, the radial size of the first planetary gear is larger than that of the second planetary gear, the first planetary gear is meshed with the sun gear for transmission, and the second planetary gear is meshed with the gear ring for transmission.

9. The electric drive axle of claim 7, wherein the differential gear set includes a plurality of differential gears distributed about an axis of rotation of the differential gears, the differential gears rotatably mounted to the planet carrier, and two side gears fixedly connected to the first and second axle shafts, respectively, and the two side gears are mounted in opposition to each other to engage a radial side of the plurality of differential gears, respectively.

10. A vehicle, characterized in that an electric drive axle as claimed in any one of claims 1-9 is provided.