CN117713444B - Distributed driving system integrated with bracket arm, motor and planetary gear reducer - Google Patents
Distributed driving system integrated with bracket arm, motor and planetary gear reducer Download PDFInfo
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- CN117713444B CN117713444B CN202410166475.1A CN202410166475A CN117713444B CN 117713444 B CN117713444 B CN 117713444B CN 202410166475 A CN202410166475 A CN 202410166475A CN 117713444 B CN117713444 B CN 117713444B
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- 239000003638 chemical reducing agent Substances 0.000 title claims abstract description 91
- 239000000725 suspension Substances 0.000 claims abstract description 93
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 61
- 239000010687 lubricating oil Substances 0.000 claims abstract description 30
- 239000003921 oil Substances 0.000 claims description 38
- 238000009434 installation Methods 0.000 claims description 19
- 230000009471 action Effects 0.000 claims description 8
- 230000001050 lubricating effect Effects 0.000 claims description 7
- 230000005484 gravity Effects 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims 1
- 230000009286 beneficial effect Effects 0.000 abstract description 4
- 229910000831 Steel Inorganic materials 0.000 description 11
- 239000010959 steel Substances 0.000 description 11
- 239000000428 dust Substances 0.000 description 9
- 230000005540 biological transmission Effects 0.000 description 8
- 230000007246 mechanism Effects 0.000 description 8
- 239000000498 cooling water Substances 0.000 description 5
- 238000005461 lubrication Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The invention relates to a distributed driving system integrating a supporting arm, a motor and a planetary gear reducer, belonging to the technical field of driving systems of electric automobiles; in the elastic bracket arm, the mounting body is connected with the driving system through the suspension assembly, and the suspension assembly adopts the rubber bushing with certain elasticity, so that the flexible connection between the driving system and the mounting body is realized; the invention integrates the structure of the row planetary gear reducer and the driving motor, a plurality of lubricating oil channels are designed in the structure to ensure that all bearings can be lubricated, and a plurality of functions are integrated on the stator water jacket part, so that a compact arrangement form is realized, and the structure has shorter axial and radial dimensions and is beneficial to the application on the distributed driving electric automobile.
Description
Technical Field
The invention relates to the technical field of electric automobile driving systems, in particular to a distributed driving system integrating a bracket arm, a motor and a planetary gear reducer.
Background
The driving mode of the electric automobile determines the arrangement and performance of the whole automobile and is mainly divided into centralized driving and distributed driving, wherein the distributed driving refers to that each driving wheel of the automobile corresponds to an independent driving system, components such as a differential mechanism and the like are omitted, independent control of wheel torque can be realized, and the electric automobile has the advantages of compact structure and high transmission efficiency, and can obviously improve the dynamic performance and the operation stability of the automobile.
At present, since the driving system is arranged on the vehicle body, the improvement of the distributed driving on the whole vehicle cannot be exerted, the distributed driving system is generally arranged in the wheel or at the wheel end, but unsprung mass is increased, and the smoothness and the maneuverability of the vehicle are affected. In addition, the space in the wheel and the wheel end is limited, and strict requirements are imposed on the size of the driving system. For example, chinese patent applications publication nos. CN116160844A, CN110293831a and CN103204059 a.
In the prior art, a driving system in an electric automobile chassis assembly is generally connected by adopting a steering bracket arm structure, a wheel edge driving motor is designed to be a sprung mass, but the driving motor and the steering bracket arm form rigid connection through bolts, vibration of the driving motor can be transmitted to an automobile body through the steering bracket arm, riding comfort of the automobile is affected, a speed reducing mechanism is not arranged, and driving performance of the electric automobile chassis assembly is limited.
In addition, in the prior art, a power source and a speed reducing mechanism are integrated through a wheel-side integrated electric driving system integrating the power source and the speed reducing mechanism, so that the occupied space and the occupied volume of the system structure are reduced, but the speed reducing mechanism adopts a fixed-axis gear, and a larger transmission ratio is realized by using a larger-size axial direction and a larger-size radial direction, so that the arrangement of the electric driving system at the wheel end is influenced.
Disclosure of Invention
In view of the above problems, the present invention provides a distributed driving system integrating a bracket arm, a motor and a planetary gear reducer, on one hand, the distributed driving system realizes complete sprung mass as a wheel-side electric driving system, and on the other hand, the distributed driving system of the present invention realizes flexible connection with a vehicle body; in addition, the invention integrates the structures of the row planetary gear reducer and the driving motor, the functions of a plurality of parts are designed in a sharing way, a compact arrangement form is realized, and the invention has shorter axial and radial dimensions and is beneficial to the application on the distributed driving electric automobile.
A distributed drive system integrating a bracket arm, a motor, a planetary gear reducer, comprising: the speed reducer assembly 1, the driving motor 2 and the elastic bracket are shown in figure 1;
Preferably, the speed reducer assembly 1 comprises a gear ring assembly and a planet carrier assembly;
the driving motor 2 comprises a rotor 22, a stator 23, a first bearing assembly 24, an electric assembly 27 and a second bearing assembly 28;
the elastic bracket includes a left suspension assembly 31, a lower suspension assembly 32, a right suspension assembly 33, and a mounting body 34.
Further, a planet carrier assembly is arranged inside the gear ring assembly; as in fig. 3;
The ring gear assembly includes a ring gear 141, a ring gear snap ring 142, and a reducer housing 143;
still further, the outer circumference of the gear ring 141 is connected with the inner circumference of the decelerator housing 143 through a key groove for circumferential fixation of the gear ring 141; the gear ring snap ring 142 is arranged in the key groove and is used for assisting in axially fixing the gear ring 141;
Further, the planet carrier assembly includes a sump 161, a main frame 162, a planetary gear set, a sub-frame 164, a main frame bearing 15, and a sub-frame bearing 17; the planetary gear set comprises a first planetary gear 163, a second planetary gear and a third planetary gear;
The main frame bearing 15 is supported on the outer surface of the front side of the main frame 162 and sleeved in a bearing hole of the reducer casing 143; as shown in fig. 3;
The first planet gears 163, the second planet gears and the third planet gears are arranged on the rear side of the main frame 162 and the front side of the auxiliary frame 164 and are uniformly distributed along the circumferential direction;
still further, the first planetary gear 163 includes a first wheel 1631, a first retainer 1632, a second retainer, a first needle bearing 1633, a second needle bearing, and a first shaft 1634;
the first shaft 1634 axially penetrates through the first connecting wheel 1631, and the front side and the rear side of the first shaft 1634 are respectively connected with the rear side of the main frame 162 and the front side of the auxiliary frame 164; the rear side of the oil sump 161 is connected to the outer circumference of the front side of the main frame 162;
Furthermore, the front and rear sides of the first shaft 1634 are pressed and deformed to be clamped into the chamfering positions of the mounting holes of the main frame 162 and the auxiliary frame 164, so that the connection between the main frame 162 and the auxiliary frame 164 and the fixation of the first shaft 1634 are realized;
The rear side of the first shaft 1634 penetrates through the first needle bearing 1633 to be connected with a large gear of the first wheel 1631, and the front side of the first shaft 1634 penetrates through the second needle bearing to be connected with a small gear of the first wheel 1631; a first check ring 1632 is arranged between the main frame 162 and the pinion of the first wheel 1631, and a second check ring is arranged between the auxiliary frame 164 and the pinion of the first wheel 1631;
The connection mode of the planet wheel II and the planet wheel III is the same as that of the planet wheel I; as in fig. 3;
Furthermore, the oil collecting groove 161 is connected with the main frame 162 in a fastening manner, and lubricating oil can enter the hollow first shaft 1634 through an oil guide pipeline on the oil collecting groove 161, and passes through Zhou Xiangkong of the first shaft 1634 to lubricate the first needle bearing 1633 and the second needle bearing under the action of centrifugal force; as shown in fig. 5;
Further, the reducer casing 143 is provided with a lubrication oil passage C for exclusively lubricating the main frame bearing 15, as shown in fig. 6; the splashed lubricating oil can be intercepted by the rib plate I A to form an oil storage area I, and the lubricating oil flows to the main frame bearing 15 along the lubricating oil duct I C under the action of gravity.
Further, the speed reducer assembly 1 further comprises a speed reducer dust cover 12 and a planet carrier framework seal 13;
The planet carrier framework seal 13 is arranged at the rear side of the speed reducer dust cover 12 and is arranged between the main frame 162 and the speed reducer shell 143, so that lubricating oil is prevented from leaking;
The rear side of the reducer dust cover 12 is respectively connected with the front end surface of the reducer casing 143 and the front end surface of the main frame 162, so as to prevent dust and impurities from entering the reducer assembly 1.
Further, the speed reducer assembly 1 further comprises a universal joint 11 and a sun gear member;
The universal joint 11 is connected with the front side of the main frame 162 through bolts at the flange end, and the wheel hub is driven through the spline of the universal joint 11; the rear side of the sun gear member is connected with the front side of the driving motor 2;
the sun gear member comprises a sun gear 181, a sun gear snap ring 182 and a sun gear skeleton seal 183;
The inner side of the sun gear 181 is connected with the motor rotor shaft 222 through a spline, the front side of the sun gear 181 is connected with the sun gear snap ring 182, and the rear side of the sun gear 181 is connected with a shaft shoulder of the motor rotor shaft 222 for axially fixing the sun gear 181; the sun gear skeleton seal 183 is arranged between the sun gear 181 and the driving motor 2, and is matched with the stator water jacket 21 to separate a cavity of the driving motor 2 from a cavity of the speed reducer assembly 1, so that lubricating oil of the speed reducer assembly 1 is prevented from entering the driving motor 2;
Further, the large gear of the first 1631 wheel is meshed with the outer periphery of the sun gear 181, the small gear of the first 1631 wheel is meshed with the inner periphery of the gear ring 141, the driving motor 2 drives the sun gear 181 to rotate, the gear ring 141 is fixed, the planet carrier assembly rotates and outputs power, and the speed reducer assembly 1 realizes torque increasing and speed reducing of the input of the driving motor 2; the universal joint 11 is connected with a main frame 162 of the planet carrier assembly through bolts at the flange end, and drives a wheel hub through a spline end.
Preferably, the driving motor 2 further comprises a stator water jacket 21, a cooling water nozzle 25, a motor housing 26 and a motor cover plate 29; as shown in fig. 3 and 4;
The outer periphery of the stator 23 is connected with the inner periphery of the stator water jacket 21, and the outer periphery of the stator water jacket is connected with the motor housing 26; the motor housing 26 is connected with the speed reducer housing 143 and the motor cover 29; the periphery of the motor casing is connected with a cooling water nozzle 25;
Furthermore, the stator water jacket 21 is provided with a spiral water channel for cooling the stator 23, meanwhile, the stator water jacket 21 separates the inner cavity of the driving motor 2 from the inner cavity of the speed reducer assembly 1, and a first bearing component 24 mounting hole and a first stator water jacket 21 boss are arranged on the front side of the stator water jacket 21 to provide mounting support for the first bearing component 24 and the subframe bearing 17;
The auxiliary frame bearing 17 is supported on the outer surface of the boss of the stator water jacket 21 and sleeved in the bearing hole of the auxiliary frame 164;
The stator water jacket 21 is provided with a second lubricating oil duct D for lubricating the subframe bearing 17, as shown in FIG. 7;
the stator water jacket 21 includes an oil baffle 212 and a stator water jacket body 211; the stator water jacket main body 211 is provided with a rib plate II B; the oil baffle 212 and the rib plate B form an oil storage area II through an oil baffle bolt 213; the lubricating oil in the second oil storage area flows to the planet carrier subframe bearing 17 along the second lubricating oil duct D under the action of gravity;
The front side of the rotor 22 is connected with a sun gear member through a motor rotor shaft 222; an outer ring of the motor rotor shaft 222 is connected with the rotor permanent magnets 221;
The front side of the rotor 22 is connected with a first bearing assembly 24 through a motor rotor shaft 222, the rear side is connected with a second bearing assembly 28 through the motor rotor shaft 222, and the first bearing assembly 24 and the second bearing assembly 28 are used for supporting the rotor 22;
The first bearing assembly 24 comprises a water jacket end steel sleeve 241, a water jacket end clamping ring 242 and a first deep groove ball bearing 243; the water jacket end steel sleeve 241 is sleeved in the mounting hole of the stator water jacket 21; the inner periphery of the deep groove ball bearing I243 is connected with the motor rotor shaft 222, and the outer periphery is connected with the water jacket end steel sleeve 241;
The second bearing assembly 28 includes a second deep groove ball bearing 281, a cover plate end steel sleeve 282 and a wave spring 283; the second bearing assembly 28 uses the motor cover plate 29 as a support body, adopts a wave spring 283 to provide pretightening force for the second deep groove ball bearing 281, eliminates or reduces bearing vibration, and reduces bearing noise; the cover plate end steel sleeve 282 reduces the machining precision and material strength requirements of the stator water jacket 21 and the motor cover plate 29, and facilitates the disassembly of the bearing;
The electrical assembly 27 includes a resolver 271, a wire harness 272, a motor junction box 273; the rotary transformer 271 is connected to the rear portion of the motor rotor shaft 222 and the wire harness 272, respectively; the other side of the wire harness 272 is connected with a motor junction box 273.
According to the technical scheme, the speed reducer assembly 1 and the driving motor 2 are integrally designed, functional multiplexing of components is achieved structurally, wherein a stator water jacket boss is arranged on the outer end face of the front side of a stator water jacket 21 in the driving motor 2 and is used for supporting a subframe bearing 17 of the speed reducer assembly 1, a bearing hole is formed in the inner end face of the front side of the stator water jacket 21 and is used for installing a first bearing component 24 in the driving motor 2, and a second lubricating oil duct D is designed on the stator water jacket 21 and is used for lubricating the subframe bearing 17.
Preferably, the elastic bracket arm comprises a left suspension assembly 31, a lower suspension assembly 32, a right suspension assembly 33 and a mounting body 34;
The left suspension component 31 is connected with the left side of the driving motor 2, the right suspension component 33 is connected with the right side of the driving motor 2, and the lower suspension component 32 is connected with the bottom of the speed reducer assembly 1; as in fig. 2;
The lower suspension assembly 32 includes a first connecting rod 321, a first bolt 322, a first bushing 323, a first bolt set 324, a first mounting body connecting rod 325, and a second bolt 326;
the first bolt 322 is arranged on the front side of the first connecting rod 321, a connecting seat is arranged on the bottom side of the speed reducer shell 143, and the first connecting rod 321 is connected with the speed reducer shell 143 through the first bolt 322;
the second bolt 326 is disposed at the rear side of the first installation body connecting rod 325, and the first installation body connecting rod 325 is connected with the installation body 34 through the second bolt 326;
the rear side of the first connecting rod 321 is connected with the front side of the first connecting rod of the installation body to form a first connecting port; the first bush 323 is connected to the first connecting port via the first bolt set 324.
The speed reducer assembly 1, the driving motor 2, the left suspension assembly 31, the lower suspension assembly 32 and the right suspension assembly 33 are connected to the mounting body 34;
It can be understood that the first suspension connection point on the left side of the driving motor 2 is connected with the mounting body 34 through the left suspension assembly 31, the second suspension connection point on the right side of the driving motor 2 is connected with the mounting body 34 through the right suspension assembly 33, and the third suspension connection point on the bottom side of the reducer assembly 1 is connected with the mounting body 34 through the lower suspension assembly 32;
The first suspension connection point and the second suspension connection point of the driving motor 2 are distributed in a plane where an inertia main shaft of the distributed driving system is located and are symmetrically distributed about the mass center of the distributed driving system;
the suspension connection point three of the speed reducer assembly 1 is disposed at the lowest position of the speed reducer housing 143.
The right suspension assembly comprises a second connecting rod, a third bolt, a second bushing, a second bolt group, a second mounting body connecting rod and a fourth bolt; the third bolt is connected with the right side of the motor shell 26, and the fourth bolt is connected with the right side of the installation body;
The left suspension assembly comprises a connecting rod III, a bolt V, a bushing III, a bolt group III, a mounting body connecting rod III and a bolt V; the bolt five is connected with the left side of the motor shell 26, and the bolt six is connected with the left side of the installation body.
Further, the first bushing, the second bushing and the third bushing are elastic rubber bushings;
the first connecting rod 321 and the first connecting rod 325 of the installation body are elastically connected through a first bushing 323;
the axial rigidity of the left suspension assembly 31, the lower suspension assembly 32 and the right suspension assembly 33 are proportional to each other: 4:1:4, a step of;
The ratio of the axial distance between the bushing center point of the left suspension assembly 31, the lower suspension assembly 32 and the right suspension assembly 33 and the end face of the installation body is 1:2.2:1.
The mounting body 34 is a mounting body capable of mounting components of a drive system, such as a vehicle body, a vehicle frame, and an angle module.
The bushing used in the invention has certain elasticity, so that flexible connection exists between the driving system and the mounting body, and the vibration of the driving system caused by torque fluctuation is ensured not to be directly transmitted to the vehicle body.
Further, the elastic supporting arm is used for supporting the whole distributed driving system, and reducing and controlling the transmission of vibration of the distributed driving system;
The driving motor 2 is used as a power source, and power is output to the speed reducer assembly 1 through a sun gear 181 fixed on a rotor shaft;
The speed reducer assembly 1 adopts a planetary gear mechanism to realize speed reduction, and can realize a larger transmission ratio in smaller axial and radial spaces through the application of a linked planet gear;
The universal joint 11 is connected with a planet carrier of the planetary gear reducer through a flange, power is output to a wheel end, and when the wheel radially jumps, the universal joint 11 allows the wheel to be non-collinear with the axis of the distributed driving system, so that vertical force cannot be transmitted to the reducer assembly 1 and the driving motor 2, and the reducer assembly 1 and the driving motor 2 are connected to a vehicle body or a vehicle frame through elastic supporting arms, so that the complete sprung of the mass of the distributed driving system is realized.
Compared with the prior art, the invention has at least the following beneficial effects:
(1) The invention designs the elastic bracket arm for fixedly supporting the driving system, which completely belongs to sprung mass, does not influence the steering stability and smoothness of the vehicle, and is very beneficial to the application of distributed driving, especially the angle module driving (the system of integrating driving, braking, steering and suspension to the wheel end);
(2) In the elastic bracket arm, the mounting body is connected with the driving system through the suspension assembly, and the suspension assembly adopts the rubber bushing with certain elasticity, so that the flexible connection between the driving system and the mounting body is realized, and the vibration of the driving system caused by torque fluctuation is ensured not to be directly transmitted to the vehicle body, thereby improving the riding comfort of the vehicle;
(3) The invention adopts the row planet gears, can meet the design requirement of large transmission, simultaneously reduces the radial size of the planetary gear mechanism, improves the transmission efficiency and reduces the total weight of the system;
(4) According to the invention, the oil collecting groove and the oil baffle plate component are arranged in the speed reducer, and the oil duct design on the speed reducer shell is matched, so that the accurate fixed-point lubrication of all bearings in the speed reducer is realized, the liquid level of lubricating oil of the speed reducer assembly is reduced, and the power loss caused by oil stirring of gears is reduced.
Drawings
The drawings are only for purposes of illustrating particular embodiments and are not to be construed as limiting the invention.
FIG. 1 is a schematic diagram of an overall isometric view of the present invention;
FIG. 2 is a schematic illustration of a component part exploded view of the spring bracket lower suspension assembly of the present invention;
FIG. 3 is a schematic diagram of an exploded view of the integral part of the present invention;
FIG. 4 is a schematic illustration of a cross-sectional view of the speed reducer assembly and drive motor of the present invention;
FIG. 5 is a schematic illustration of a split view of the components of the planet carrier assembly of the present invention;
FIG. 6 is a schematic illustration of a front view of the oil storage area of the reducer housing of the present invention;
FIG. 7 is a schematic illustration of an axial view of a stator water jacket and associated assembly components of the present invention;
Reference numerals:
1-speed reducer assembly, 2-drive motor, 11-universal joint, 12-speed reducer dust cover, 13-carrier frame seal, 15-main frame bearing, 17-subframe bearing, 21-stator water jacket, 22-rotor, 23-stator, 24-bearing assembly one, 25-cooling water nozzle, 26-motor housing, 27-electrical assembly, 28-bearing assembly two, 29-motor cover plate, 31-left suspension assembly, 32-lower suspension assembly, 33-right suspension assembly, 34-mount body, 141-ring gear, 142-ring gear snap ring, 143-speed reducer housing, 161-sump, 162-main frame, 163-planet wheel one, 164-subframe, 181-sun gear, 182-sun gear snap ring, 183-sun gear frame seal, 211-stator water jacket body, 212-oil baffle plate, 213-baffle plate bolt, 221-rotor permanent magnet, 222-motor rotor shaft, 241-water jacket end steel sleeve, 242-water jacket end 243-groove ball bearing one, 271-rotating transformer, 272-273, 326-junction box, 321-282, 282-flange plate one, 1633-second, 163-flange plate, 163-well-mounting flange plate one, 163-3-well-B, 163-B-well-plate, 1632-B-well-fastener, 1633-B-well-B-fastener, 163, and one-well-plate-B-fastener, 163-3-B-well-B-fastener, and one-well-fastener, 163-B-well-fastener, c-lubricating oil duct I, D-lubricating oil duct II.
Detailed Description
In order that the above-recited objects, features and advantages of the present invention will be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description. It should be noted that, without conflict, the embodiments of the present invention and features in the embodiments may be combined with each other. In addition, the invention may be practiced otherwise than as specifically described and thus the scope of the invention is not limited by the specific embodiments disclosed herein.
In order to illustrate the effectiveness of the method according to the present invention, a specific embodiment of the present invention is shown in fig. 1-7, which discloses a distributed driving system integrated with a bracket, a motor and a planetary gear reducer, and the following specific implementation steps are as follows:
comprising the following steps: the speed reducer assembly 1, the driving motor 2 and the elastic bracket are shown in figure 1;
Preferably, the speed reducer assembly 1 comprises a gear ring assembly and a planet carrier assembly;
the driving motor 2 comprises a rotor 22, a stator 23, a first bearing assembly 24, an electric assembly 27 and a second bearing assembly 28;
the elastic bracket includes a left suspension assembly 31, a lower suspension assembly 32, a right suspension assembly 33, and a mounting body 34.
Further, a planet carrier assembly is arranged inside the gear ring assembly; as in fig. 3;
The ring gear assembly includes a ring gear 141, a ring gear snap ring 142, and a reducer housing 143;
still further, the outer circumference of the gear ring 141 is connected with the inner circumference of the decelerator housing 143 through a key groove for circumferential fixation of the gear ring 141; the gear ring snap ring 142 is arranged in the key groove and is used for assisting in axially fixing the gear ring 141;
Further, the planet carrier assembly includes a sump 161, a main frame 162, a planetary gear set, a sub-frame 164, a main frame bearing 15, and a sub-frame bearing 17; the planetary gear set comprises a first planetary gear 163, a second planetary gear and a third planetary gear;
The main frame bearing 15 is supported on the outer surface of the front side of the main frame 162 and sleeved in a bearing hole of the reducer casing 143; as shown in fig. 3;
The first planet gears 163, the second planet gears and the third planet gears are arranged on the rear side of the main frame 162 and the front side of the auxiliary frame 164 and are uniformly distributed along the circumferential direction;
still further, the first planetary gear 163 includes a first wheel 1631, a first retainer 1632, a second retainer, a first needle bearing 1633, a second needle bearing, and a first shaft 1634;
the first shaft 1634 axially penetrates through the first connecting wheel 1631, and the front side and the rear side of the first shaft 1634 are respectively connected with the rear side of the main frame 162 and the front side of the auxiliary frame 164; the rear side of the oil sump 161 is connected to the outer circumference of the front side of the main frame 162;
Furthermore, the front and rear sides of the first shaft 1634 are pressed and deformed to be clamped into the chamfering positions of the mounting holes of the main frame 162 and the auxiliary frame 164, so that the connection between the main frame 162 and the auxiliary frame 164 and the fixation of the first shaft 1634 are realized;
The rear side of the first shaft 1634 penetrates through the first needle bearing 1633 to be connected with a large gear of the first wheel 1631, and the front side of the first shaft 1634 penetrates through the second needle bearing to be connected with a small gear of the first wheel 1631; a first check ring 1632 is arranged between the main frame 162 and the pinion of the first wheel 1631, and a second check ring is arranged between the auxiliary frame 164 and the pinion of the first wheel 1631;
the connection mode of the planet wheel II and the planet wheel III is the same as that of the planet wheel I163; as in fig. 3;
Furthermore, the oil collecting groove 161 is connected with the main frame 162 in a fastening manner, and lubricating oil can enter the hollow first shaft 1634 through an oil guide pipeline on the oil collecting groove 161, and passes through Zhou Xiangkong of the first shaft 1634 to lubricate the first needle bearing 1633 and the second needle bearing under the action of centrifugal force; as shown in fig. 5;
further, the reducer casing 143 is provided with a lubrication oil passage C for exclusively lubricating the main frame bearing 15, as shown in fig. 6; the splashed lubricating oil can be intercepted by the rib plate I A to form an oil storage area I, and the lubricating oil flows to the main frame bearing 15 along the lubricating oil duct under the action of gravity.
Further, the speed reducer assembly 1 further comprises a speed reducer dust cover 12 and a planet carrier framework seal 13;
The planet carrier framework seal 13 is arranged at the rear side of the speed reducer dust cover 12 and is arranged between the main frame 162 and the speed reducer shell 143, so that lubricating oil is prevented from leaking;
The rear side of the reducer dust cover 12 is respectively connected with the front end surface of the reducer casing 143 and the front end surface of the main frame 162, so as to prevent dust and impurities from entering the reducer assembly 1.
Further, the speed reducer assembly 1 further comprises a universal joint 11 and a sun gear member;
The universal joint 11 is connected with the front side of the main frame 162 through bolts at the flange end, and the wheel hub is driven through the spline of the universal joint 11; the rear side of the sun gear member is connected with the front side of the driving motor 2;
the sun gear member comprises a sun gear 181, a sun gear snap ring 182 and a sun gear skeleton seal 183;
The inner side of the sun gear 181 is connected with the motor rotor shaft 222 through a spline, the front side of the sun gear 181 is connected with the sun gear snap ring 182, and the rear side of the sun gear 181 is connected with a shaft shoulder of the motor rotor shaft 222 for axially fixing the sun gear 181; the sun gear skeleton seal 183 is arranged between the sun gear 181 and the driving motor 2, and is matched with the stator water jacket 21 to separate a cavity of the driving motor 2 from a cavity of the speed reducer assembly 1, so that lubricating oil of the speed reducer assembly 1 is prevented from entering the driving motor 2;
Further, the large gear of the first 1631 wheel is meshed with the outer periphery of the sun gear 181, the small gear of the first 1631 wheel is meshed with the inner periphery of the gear ring 141, the driving motor 2 drives the sun gear 181 to rotate, the gear ring 141 is fixed, the planet carrier assembly rotates and outputs power, and the speed reducer assembly 1 realizes torque increasing and speed reducing of the input of the driving motor 2; the universal joint 11 is connected with a main frame 162 of the planet carrier assembly through bolts at the flange end, and drives a wheel hub through a spline end.
Preferably, the driving motor 2 further comprises a stator water jacket 21, a cooling water nozzle 25, a motor housing 26 and a motor cover plate 29; as shown in fig. 3 and 4;
The outer periphery of the stator 23 is connected with the inner periphery of the stator water jacket 21, and the outer periphery of the stator water jacket is connected with the motor housing 26; the motor housing 26 is connected with the speed reducer housing 143 and the motor cover 29; the periphery of the motor casing is connected with a cooling water nozzle 25;
Furthermore, the stator water jacket 21 is provided with a spiral water channel for cooling the stator 23, meanwhile, the stator water jacket 21 separates the inner cavity of the driving motor 2 from the inner cavity of the speed reducer assembly 1, and a first bearing component 24 mounting hole and a first stator water jacket 21 boss are arranged on the front side of the stator water jacket 21 to provide mounting support for the first bearing component 24 and the subframe bearing 17;
The auxiliary frame bearing 17 is supported on the outer surface of the boss of the stator water jacket 21 and sleeved in the bearing hole of the auxiliary frame 164;
The stator water jacket 21 is provided with a second lubricating oil duct D for lubricating the subframe bearing 17, as shown in FIG. 7;
the stator water jacket 21 includes an oil baffle 212 and a stator water jacket body 211; the stator water jacket main body 211 is provided with a rib plate II B; the oil baffle 212 and the rib plate B form an oil storage area II through an oil baffle bolt 213; the lubricating oil in the second oil storage area flows to the planet carrier subframe bearing 17 along the second lubricating oil duct D under the action of gravity;
The front side of the rotor 22 is connected with a sun gear member through a motor rotor shaft 222; an outer ring of the motor rotor shaft 222 is connected with the rotor permanent magnets 221;
The front side of the rotor 22 is connected with a first bearing assembly 24 through a motor rotor shaft 222, the rear side is connected with a second bearing assembly 28 through the motor rotor shaft 222, and the first bearing assembly 24 and the second bearing assembly 28 are used for supporting the rotor 22;
The first bearing assembly 24 comprises a water jacket end steel sleeve 241, a water jacket end clamping ring 242 and a first deep groove ball bearing 243; the water jacket end steel sleeve 241 is sleeved in the mounting hole of the stator water jacket 21; the inner periphery of the deep groove ball bearing I243 is connected with the motor rotor shaft 222, and the outer periphery is connected with the water jacket end steel sleeve 241;
The second bearing assembly 28 includes a second deep groove ball bearing 281, a cover plate end steel sleeve 282 and a wave spring 283; the second bearing assembly 28 uses the motor cover plate 29 as a support body, adopts a wave spring 283 to provide pretightening force for the second deep groove ball bearing 281, eliminates or reduces bearing vibration, and reduces bearing noise; the cover plate end steel sleeve 282 reduces the machining precision and material strength requirements of the stator water jacket 21 and the motor cover plate 29, and facilitates the disassembly of the bearing;
The electrical assembly 27 includes a resolver 271, a wire harness 272, a motor junction box 273; the rotary transformer 271 is connected to the rear portion of the motor rotor shaft 222 and the wire harness 272, respectively; the other side of the wire harness 272 is connected with a motor junction box 273.
According to the technical scheme, the speed reducer assembly 1 and the driving motor 2 are integrally designed, functional multiplexing of components is achieved structurally, wherein a stator water jacket boss is arranged on the outer end face of the front side of a stator water jacket 21 in the driving motor 2 and is used for supporting a subframe bearing 17 of the speed reducer assembly 1, a bearing hole is formed in the inner end face of the front side of the stator water jacket and is used for installing a bearing component I24 in the driving motor 2, and a lubricating oil duct II D is designed on the stator water jacket 21 and is used for lubricating the subframe bearing 17.
Preferably, the elastic bracket arm comprises a left suspension assembly 31, a lower suspension assembly 32, a right suspension assembly 33 and a mounting body 34;
The left suspension component 31 is connected with the left side of the driving motor 2, the right suspension component 33 is connected with the right side of the driving motor 2, and the lower suspension component 32 is connected with the bottom of the speed reducer assembly 1; as in fig. 2;
The lower suspension assembly 32 includes a first connecting rod 321, a first bolt 322, a first bushing 323, a first bolt set 324, a first mounting body connecting rod 325, and a second bolt 326;
the first bolt 322 is arranged on the front side of the first connecting rod 321, a connecting seat is arranged on the bottom side of the speed reducer shell 143, and the first connecting rod 321 is connected with the speed reducer shell 143 through the first bolt 322;
the second bolt 326 is disposed at the rear side of the first installation body connecting rod 325, and the first installation body connecting rod 325 is connected with the installation body 34 through the second bolt 326;
the rear side of the first connecting rod 321 is connected with the front side of the first connecting rod 325 of the mounting body to form a first connecting port; the first bush 323 is connected to the first connecting port via the first bolt set 324.
The speed reducer assembly 1, the driving motor 2, the left suspension assembly 31, the lower suspension assembly 32 and the right suspension assembly 33 are connected to the mounting body 34;
It can be understood that the first suspension connection point on the left side of the driving motor 2 is connected with the mounting body 34 through the left suspension assembly 31, the second suspension connection point on the right side of the driving motor 2 is connected with the mounting body 34 through the right suspension assembly 33, and the third suspension connection point on the bottom side of the reducer assembly 1 is connected with the mounting body 34 through the lower suspension assembly 32;
The first suspension connection point and the second suspension connection point of the driving motor 2 are distributed in a plane where an inertia main shaft of the distributed driving system is located and are symmetrically distributed about the mass center of the distributed driving system;
the suspension connection point three of the speed reducer assembly 1 is disposed at the lowest position of the speed reducer housing 143.
The right suspension assembly comprises a second connecting rod, a third bolt, a second bushing, a second bolt group, a second mounting body connecting rod and a fourth bolt; the third bolt is connected with the right side of the motor shell 26, and the fourth bolt is connected with the right side of the installation body;
The left suspension assembly comprises a connecting rod III, a bolt V, a bushing III, a bolt group III, a mounting body connecting rod III and a bolt V; the bolt five is connected with the left side of the motor shell 26, and the bolt six is connected with the left side of the installation body.
Further, the first bushing, the second bushing and the third bushing are elastic rubber bushings;
the first connecting rod 321 and the first connecting rod 325 of the installation body are elastically connected through a first bushing 323;
the axial rigidity of the left suspension assembly 31, the lower suspension assembly 32 and the right suspension assembly 33 are proportional to each other: 4:1:4, a step of;
The ratio of the axial distance between the bushing center point of the left suspension assembly 31, the lower suspension assembly 32 and the right suspension assembly 33 and the end face of the installation body is 1:2.2:1.
The mounting body 34 is a mounting body capable of mounting components of a drive system, such as a vehicle body, a vehicle frame, and an angle module.
The bushing used in the invention has certain elasticity, so that flexible connection exists between the driving system and the mounting body, and the vibration of the driving system caused by torque fluctuation is ensured not to be directly transmitted to the vehicle body.
Further, the elastic supporting arm is used for supporting the whole distributed driving system, and reducing and controlling the transmission of vibration of the distributed driving system;
The driving motor 2 is used as a power source, and power is output to the speed reducer assembly 1 through a sun gear 181 fixed on a rotor shaft;
The speed reducer assembly 1 adopts a planetary gear mechanism to realize speed reduction, and can realize a larger transmission ratio in smaller axial and radial spaces through the application of a linked planet gear;
The universal joint 11 is connected with a planet carrier of the planetary gear reducer through a flange, power is output to a wheel end, and when the wheel radially jumps, the universal joint 11 allows the wheel to be non-collinear with the axis of the distributed driving system, so that vertical force cannot be transmitted to the reducer assembly 1 and the driving motor 2, and the reducer assembly 1 and the driving motor 2 are connected to a vehicle body or a vehicle frame through elastic supporting arms, so that the complete sprung of the mass of the distributed driving system is realized.
The present invention is not limited to the above-mentioned embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present invention are intended to be included in the scope of the present invention.
Claims (6)
1. The distributed driving system integrating the supporting arm, the motor and the planetary gear reducer is characterized by comprising a reducer assembly (1), a driving motor (2) and an elastic supporting arm;
The speed reducer assembly (1) comprises a planet carrier assembly, a speed reducer shell (143), a universal joint (11) and a sun gear member; the planet carrier assembly comprises an oil collecting groove (161), a main frame (162), a planet wheel group, a sub-frame (164), a main frame bearing (15) and a sub-frame bearing (17); the planetary gear set is arranged between the main frame (162) and the auxiliary frame (164); the main frame bearing is connected with the main frame; the auxiliary frame bearing is connected with the driving motor (2); the oil collecting groove (161) is connected with the main frame (162);
The driving motor (2) comprises a rotor (22), a stator (23), a first bearing component (24) and a second bearing component (28); the first bearing assembly (24) and the second bearing assembly (28) are used for supporting the rotor (22); the drive motor further comprises a stator water jacket (21); the stator (23) is connected with the stator water jacket (21); the stator water jacket (21) is provided with a spiral water channel for cooling the stator (23); the stator water jacket (21) separates the inner cavity of the driving motor (2) from the inner cavity of the speed reducer assembly (1);
The stator water jacket (21) is provided with a bearing hole and a stator water jacket boss which are respectively used for supporting a bearing assembly I (24) and a subframe bearing (17);
The stator water jacket (21) comprises a second lubricating oil duct, an oil baffle plate (212) and a stator water jacket main body (211); the second lubricating oil duct is used for lubricating the auxiliary frame bearing (17); a second rib plate is arranged on the stator water jacket main body (211); the oil baffle plate (212) and the second rib plate form an oil storage area II, and lubricating oil in the oil storage area II flows to the auxiliary frame bearing along the lubricating oil duct under the action of gravity;
The speed reducer assembly (1) and the driving motor (2) are connected to form an integrated driving device, and the integrated driving device is arranged on the elastic supporting arm and is used for realizing flexible connection between the integrated driving device and the elastic supporting arm and realizing complete sprung of the quality of the distributed driving system;
the universal joint is connected with the main frame;
the sun gear member comprises a sun gear (181) and a sun gear skeleton seal (183);
the sun gear (181) is connected with the rotor (22); the sun gear framework is arranged between the sun gear (181) and the driving motor (2) in a sealing way;
the speed reducer shell (143) is provided with a first rib plate for intercepting splashed lubricating oil to form a first oil storage area;
the oil collecting groove (161) comprises a first needle bearing (1633), a second needle bearing and a first shaft (1634);
the splashed lubricating oil enters the first shaft (1634) through an oil guide pipeline on the oil collecting groove (161), passes through a circumferential hole of the first shaft (1634) under the action of centrifugal force, and lubricates the first needle bearing (1633) and the second needle bearing.
2. A distributed drive system according to claim 1, wherein the resilient bracket arm comprises a left suspension assembly (31), a lower suspension assembly (32) and a right suspension assembly (33);
The left suspension assembly (31) and the right suspension assembly (33) are respectively connected with the driving motor (2), and the lower suspension assembly is connected with the speed reducer assembly (1);
the lower suspension assembly (32) includes a bushing one (323); the right suspension assembly (33) comprises a second bushing; the left suspension assembly (31) includes a bushing III.
3. The distributed drive system of claim 2, wherein the first (323), second, and third bushings are elastomeric rubber bushings.
4. A distributed drive system according to claim 3, wherein the axial stiffness of the left suspension assembly (31), the lower suspension assembly (32) and the right suspension assembly (33) are proportional to: 4:1:4.
5. A distributed drive system according to claim 4, wherein the resilient bracket further comprises a mounting body (34); the speed reducer assembly (1) and the driving motor (2) are connected to the installation body through the left suspension assembly (31), the lower suspension assembly (32) and the right suspension assembly (33).
6. The distributed drive system of claim 5, further comprising a first suspension connection point, a second suspension connection point, and a third suspension connection point;
the first suspension connection point is connected with the installation body through the left suspension assembly, the second suspension connection point is connected with the installation body through the right suspension assembly, and the third suspension connection point is connected with the installation body through the lower suspension assembly.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202410166475.1A CN117713444B (en) | 2024-02-06 | 2024-02-06 | Distributed driving system integrated with bracket arm, motor and planetary gear reducer |
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| CN202410166475.1A CN117713444B (en) | 2024-02-06 | 2024-02-06 | Distributed driving system integrated with bracket arm, motor and planetary gear reducer |
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| CN117713444A CN117713444A (en) | 2024-03-15 |
| CN117713444B true CN117713444B (en) | 2024-04-19 |
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| CN117713444A (en) | 2024-03-15 |
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