CN117565650A - Power drive system, chassis architecture and vehicle - Google Patents

Abstract

The invention discloses a power driving system, a chassis framework and a vehicle, wherein the power driving system comprises a driving unit and a power coupling structure, the driving unit comprises a first driving unit and a second driving unit, the first driving unit is provided with a first output shaft, and the second driving unit is provided with a second output shaft; the power coupling structure is arranged between the first driving unit and the second driving unit, the power driving system is provided with a first mode and a second mode, and in the first mode, the first driving unit independently drives the first output shaft and the second driving unit independently drives the second output shaft; in the second mode, the first driving unit is linked with the second driving unit through the power coupling structure, so that power of the first driving unit and power of the second driving unit can be intensively output through the first output shaft or the second output shaft. The technical scheme of the invention can improve the escaping capability of the vehicle under complex road conditions such as climbing, escaping and the like.

Description

Power drive system, chassis architecture and vehicle

Technical Field

The invention relates to the technical field of vehicle power systems, in particular to a power driving system, a chassis framework and a vehicle.

Background

The distributed double electric drive has the unique advantages of simple structure, high efficiency and energy saving transmission, independent and controllable driving and braking torque and the like, can cancel an automobile steering mechanism, and is an intelligent future development trend of new energy automobiles. Under normal working condition running, the wheel torque is enough to meet the running overtaking requirement, but under complex road conditions such as climbing, getting rid of poverty, the wheel easily slips in a spin way, and the problem of insufficient torque occurs. Accordingly, there is a need to provide a new solution to improve or solve this problem.

Disclosure of Invention

The invention mainly aims to provide a power driving system which aims to improve the escaping capability of a vehicle under complex road conditions such as climbing, escaping and the like.

To achieve the above object, the present invention provides a power drive system comprising:

a drive unit including a first drive unit having a first output shaft and a second drive unit having a second output shaft; and

the power coupling structure is arranged between the first driving unit and the second driving unit, the power driving system is provided with a first mode and a second mode, and in the first mode, the first driving unit independently drives the first output shaft and the second driving unit independently drives the second output shaft; in the second mode, the first driving unit is linked with the second driving unit through the power coupling structure, so that power of the first driving unit and the second driving unit can be intensively output through the first output shaft or the second output shaft.

Optionally, the power coupling structure is disposed between the first output shaft and the second output shaft, and in the second mode, the first output shaft is linked with the second output shaft through the power coupling structure.

Optionally, the axis of the first output shaft extends along a first direction, the power coupling structure includes a first engagement portion, a second engagement portion, and an actuating mechanism, in the first direction, the first engagement portion is fixed relative to the driving unit, the second engagement portion is movable relative to the driving unit, and the actuating mechanism is capable of at least urging the second engagement portion to approach and engage with the first engagement portion; one of the first engagement portion and the second engagement portion is provided at the first output shaft, and the other is provided at the second output shaft.

Optionally, the first engaging portion and the second engaging portion are distributed along a radial direction of the first output shaft, a first tooth portion is disposed on an outer peripheral surface of the first engaging portion, a second tooth portion is disposed on an inner peripheral surface of the second engaging portion, and the second tooth portion can move along the first direction and is in socket engagement with the first tooth portion.

Optionally, the first engaging portion and the second engaging portion are distributed along an axial direction of the first output shaft, a first tooth portion is disposed on an end face of the first engaging portion, a second tooth portion is disposed on an end face of the second engaging portion, and the second tooth portion can move along the first direction and is engaged with the first tooth portion in an abutting mode.

Optionally, the first output shaft includes first axle section and the second axle section that is connected, first axle section is connected with first drive unit, the second output shaft includes the third axle section, the third axle section is equipped with and is used for supplying the second axle section stretches into the installation cavity, first tooth portion with the second tooth portion is all located the installation intracavity.

Optionally, the first engaging portion and the second engaging portion are distributed along a radial direction of the first output shaft, the second engaging portion is slidably arranged on an inner side surface of the mounting cavity, the actuating mechanism is arranged on the third shaft section, and the first engaging portion is fixedly arranged on a peripheral side surface of the second shaft section.

Optionally, an inner spline is disposed on an inner side surface of the mounting cavity, an outer spline is disposed on a peripheral side surface of the second engagement portion, and the outer spline is adapted to the inner spline.

Optionally, the third shaft section includes a first shell section and a second shell section that are spliced together, the first shell section and the second shell section jointly enclose the mounting cavity, the second shell section is disposed near the first shaft section, and the actuating mechanism is disposed on the first shell section;

optionally, the first engaging portion and the second engaging portion are distributed along an axial direction of the first output shaft, the second engaging portion is slidably provided on a peripheral side surface of the second shaft section, the first engaging portion is the second shell portion, and the first tooth portion is provided on an end surface of the second shell portion, which is close to the mounting cavity.

Optionally, the power coupling structure further includes an elastic restoring member disposed in the mounting cavity, the elastic restoring member connects the second engaging portion and the third shaft section, and when the actuating mechanism drives the second engaging portion to approach the first engaging portion, an elastic deformation amount of the elastic restoring member increases.

Optionally, the actuating mechanism includes round pin axle and driving piece, the diapire of installation cavity is equipped with the hole of stepping down, the first end of round pin axle passes the hole of stepping down and stretch into the installation cavity, and can the butt second meshing portion, the second end of round pin axle is located the outside of installation cavity, and receive the drive of driving piece.

Optionally, the actuating mechanism further includes a shift fork movably disposed on the third shaft section, one end of the shift fork is connected to the driving member, and the other end of the shift fork is connected to the second end of the pin shaft.

Optionally, the driving piece includes an electromagnet, and a material of the pin shaft is configured to be a magnetic material, so that when the electromagnet is electrified, a repulsive force can be generated on the pin shaft, and the pin shaft is caused to push the second engagement portion to engage with the first engagement portion.

Optionally, the first output shaft includes first axle section and the second axle section that is connected, first axle section is connected with first drive unit, the second output shaft includes third axle section and fourth axle section, the third axle section is connected with second drive unit, the second axle section with the fourth axle section is relative and adjacent the setting, one of them is equipped with the second meshing portion, and another is equipped with the first meshing portion.

Optionally, the first engaging portion and the second engaging portion are distributed along a radial direction of the first output shaft, the second engaging portion is provided with a first internal spline and a second internal spline at intervals along the first direction, the first engaging portion is provided with a first external spline corresponding to the first internal spline, the second shaft section is provided with a second external spline corresponding to the second internal spline, and the second external spline is slidably sleeved on the second internal spline; the first external spline is the first tooth portion, and the first internal spline is the second tooth portion.

Optionally, the fourth shaft section is provided with a shaft inner cavity, the end part of the second shaft section is provided with a bearing step, at least part of the bearing step extends into the shaft inner cavity, and the power driving system further comprises a third bearing, wherein the third bearing is arranged between the inner side surface of the shaft inner cavity and the bearing step.

Optionally, the second shaft section and the fourth shaft section are arranged at intervals in the first direction, the first meshing portion and the second meshing portion are distributed along the axial direction of the first output shaft, the second meshing portion is slidably arranged on the peripheral side face of the second shaft section, and the first meshing portion is fixedly arranged on the peripheral side face of the fourth shaft section.

Optionally, the actuating mechanism includes push-pull member and driving piece, the second meshing portion corresponds the push-pull member is equipped with the atress groove, the first end of push-pull member inserts and establishes the atress groove, the second end of push-pull member exposes in the outside in atress groove, and receive the drive of driving piece.

The invention also provides a chassis framework which comprises the power driving system.

The invention also proposes a vehicle comprising the aforementioned power drive system, or comprising the aforementioned chassis architecture.

The invention also provides a vehicle, which comprises a vehicle body, a first driving wheel, a second driving wheel and the power driving system, wherein the first driving wheel and the second driving wheel are respectively arranged on two opposite sides of the vehicle body, a first output shaft of the power driving system is connected with the first driving wheel, and a second output shaft of the power driving system is connected with the second driving wheel.

According to the technical scheme, the power coupling structure is additionally arranged between the first driving unit and the second driving unit, so that various advantages of the distributed double electric drive can be brought into play when the vehicle runs normally, and the output torque of the first driving unit and the output torque of the second driving unit can be transmitted to the first output shaft or the second output shaft in a concentrated manner when the vehicle is in complex road conditions such as climbing and getting rid of poverty, and the output torque is output to the driving wheel which does not slip through the first output shaft or the second output shaft, so that the getting rid of poverty of the vehicle is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a first embodiment of a power drive system according to the present invention;

FIG. 2 is a schematic diagram of a power driving system according to a second embodiment of the present invention;

FIG. 3 is a schematic diagram of a third embodiment of a power driving system according to the present invention;

FIG. 4 is a schematic diagram of a fourth embodiment of the power drive system of the present invention;

FIG. 5 is a schematic diagram of a fifth embodiment of a power driving system according to the present invention;

FIG. 6 is a schematic diagram of a sixth embodiment of a power driving system according to the present invention;

FIG. 7 is a schematic diagram of a seventh embodiment of a power driving system according to the present invention;

FIG. 8 is a schematic engagement view of the first engagement portion and the second engagement portion of the embodiment of FIG. 4;

FIG. 9 is an exploded view of the structure shown in FIG. 8;

FIG. 10 is an enlarged view of a portion of FIG. 9 at A;

fig. 11 is a schematic structural view of a second engagement portion of the embodiment shown in fig. 5.

Reference numerals illustrate:

reference numerals	Name of the name	Reference numerals	Name of the name
				10	First drive unit	30	Power coupling structure
11	First motor	31	A first engagement portion
				12	First reduction gear set	311	First tooth part
13	First output shaft	312	First external spline
				131	A first shaft section	32	Second engagement portion
132	Second shaft section	321	Second tooth part
				133	First flat key	322	Sliding key groove
134	Second external spline	323	First internal spline
				135	Bearing step	324	Second internal spline
20	Second drive unit	325	Stress groove
				21	Second motor	326	Lead-in angle
22	Second reduction gear set	33	Actuating mechanism
				23	Second output shaft	331	Pin shaft
23a	Mounting cavity	332	Shifting fork
				23b	Yielding hole	333	Push-pull member
23c	Shaft lumen	34	Elastic resetting piece
				231	Third shaft section	41	First bearing
232	Fourth shaft section	42	Second bearing
				233	A first shell portion	43	Third bearing
234	A second shell portion

The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present invention are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.

In the present invention, unless specifically stated and limited otherwise, the terms "connected," "affixed," and the like are to be construed broadly, and for example, "affixed" may be a fixed connection, a removable connection, or an integral body; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

In addition, if there is a description of "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" as it appears throughout includes three parallel schemes, for example "A and/or B", including the A scheme, or the B scheme, or the scheme where A and B are satisfied simultaneously. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.

The present invention provides a power drive system, which can be applied to a highly integrated chassis architecture, and can also be applied to a vehicle, and the present application is not limited in particular. The vehicle is provided with a vehicle body, and two driving wheels, namely a first driving wheel and a second driving wheel, which are respectively arranged on two opposite sides of the vehicle body. Referring to fig. 1 to 11, the cross-sectional views of fig. 4 to 7 only show the structure of the related structure located at one side of the central axis.

Referring to fig. 1 to 7, in an embodiment of the power driving system of the present invention, the power driving system includes:

a drive unit comprising a first drive unit 10 and a second drive unit 20, the first drive unit 10 having a first output shaft 13 and the second drive unit 20 having a second output shaft 23; and

the power coupling structure 30 is arranged between the first driving unit 10 and the second driving unit 20, the power driving system is provided with a first mode and a second mode, in the first mode, the first driving unit 10 independently drives the first output shaft 13 and the second driving unit 20 independently drives the second output shaft 23; in the second mode, the first driving unit 10 is coupled with the second driving unit 20 through the power coupling structure 30 so that power of the first driving unit 10 and the second driving unit 20 can be intensively output through the first output shaft 13 or the second output shaft 23.

Specifically, the power drive system will be described below as an example of application to a vehicle in which the first output shaft 13 is connected to first drive wheels and the second output shaft 23 is connected to second drive wheels. When the vehicle is running normally, the output torques of the first driving unit 10 and the second driving unit 20 are not coupled, and the driving wheels on both sides of the vehicle body are independently driven; when the spin slip degrees of the driving wheels at both sides of the vehicle are different and the escaping demand occurs, the power coupling structure 30 acts and causes the output torques of the first driving unit 10 and the second driving unit 20 to be coupled so as to transmit the output torques originally transmitted to the driving wheels at the slip side to the driving wheels at the non-slip side, that is, the output torques of the first driving unit 10 and the second driving unit 20 are intensively transmitted to the driving wheels at the non-slip side, thereby fully utilizing the adhesion force of the driving wheels to generate enough traction force and enabling the vehicle to escape and continue traveling.

According to the technical scheme of the invention, the power coupling structure 30 is additionally arranged between the first driving unit 10 and the second driving unit 20, so that various advantages of the distributed double electric drive can be brought into play when the vehicle normally runs, and the output torque of the first driving unit 10 and the second driving unit 20 can be transmitted to the first output shaft 13 or the second output shaft 23 in a concentrated manner when the vehicle is in complex road conditions such as climbing, getting rid of poverty and the like, and is output to a driving wheel which does not slip through the first output shaft 13 or the second output shaft 23, so that the getting rid of poverty of the vehicle is improved.

Referring to fig. 1, in an alternative embodiment of the present invention, the first driving unit 10 includes a first motor 11, the second driving unit 20 includes a second motor 21, and the vehicle further includes a power battery electrically connected to both the first motor 11 and the second motor 21. Thus, it is advantageous to reduce the carbon emissions of the vehicle during traveling and to improve its market competitiveness. Of course, in other embodiments, an internal combustion engine, a steam engine, or the like may also be employed as the power source of the first drive unit 10 and the second drive unit 20.

Without loss of generality, the drive unit typically also includes a reduction structure disposed between the motor and the output shaft, including but not limited to the form of a reduction gear set, as this application is not specifically limited. However, for convenience of explanation, a reduction structure will be described as a reduction gear set.

That is, referring to fig. 1 to 3, the first driving unit 10 further includes a first reduction gear set 12, a driving gear of a primary gear set of the first reduction gear set 12 is disposed on a rotating shaft of the first motor 11, and a driven gear of a final gear set is disposed on the first output shaft 13; the second driving unit 20 further includes a second reduction gear set 22, a driving gear of a gear set of a primary gear set of the second reduction gear set 22 is provided on a rotating shaft of the first motor 11, and a driven gear of a final gear set is provided on a second output shaft 23.

It will be appreciated that there are various power coupling structures 30 and forms, for example, referring to fig. 1, in the first embodiment, the power coupling structure 30 is disposed between the rotating shaft of the first motor 11 and the rotating shaft of the second motor 21, that is, the coupling position is at the input shaft, and the power coupling of the input shaft is achieved.

Referring to fig. 2, in the second embodiment, the power coupling structure 30 is disposed between the rotation axes of the driven gears of the primary wheel sets of the two driving units, that is, the coupling position is at the intermediate shaft, so as to realize the power coupling of the intermediate shaft. Of course, the power coupling structure 30 may be provided on another intermediate shaft, and is not limited to the illustrated form.

It should be noted that, when the second mode is entered and the torque is output on one side, the parts from the coupling position to the rear all participate in the operation of the torque output on one side, and thus, higher performance requirements are put on the parts, including but not limited to performance such as torsional strength and the like. That is, the parts involved in the one-sided output torque need to be able to withstand at least twice the maximum of the peak torques of the first motor 11 or the second motor 21.

Without loss of generality, the structural dimensions of the part are typically chosen to be increased to enhance its performance, including torsional strength, without changing the material of the part. It will be appreciated that the closer the coupling position is to the input (e.g. the shaft of the first electric machine 11), the more parts are involved in the single-sided output torque, and the greater the overall space occupied by the arrangement, which is detrimental to the overall spatial arrangement of the power drive system, when these parts are required to meet the higher performance requirements.

Thus, the present invention preferably provides that the coupling location is a power coupling of the drive shaft. Specifically, referring to fig. 3, in the third embodiment, the power coupling structure 30 is disposed between the first output shaft 13 and the second output shaft 23, and in the second mode, the first output shaft 13 is linked with the second output shaft 23 through the power coupling structure 30.

In the third embodiment, further alternatively, the first output shaft 13 and the second output shaft 23 are coaxially disposed, and the first motor 11 and the second motor 21 are disposed side by side on the vehicle body in the front-rear direction of the vehicle, that is, a structure in which two motors are arranged in parallel is adopted. Thus, the structure of the power driving system is simplified, the space requirement for arrangement of the power driving system is reduced, and the system arrangement is more compact. Of course, in other embodiments, the first output shaft 13 and the second output shaft 23 may be coaxial, not coaxial, and the first motor 11 and the second motor 21 may be offset in the front-rear direction of the vehicle, or may be arranged side by side in the left-right direction or the up-down direction of the vehicle.

Referring to fig. 4 to 7, in the third embodiment, alternatively, the axis of the first output shaft 13 extends along a first direction, the power coupling structure 30 includes a first engaging portion 31, a second engaging portion 32, and an actuating mechanism 33, in the first direction, the first engaging portion 31 is fixed relative to the driving unit, the second engaging portion 32 is capable of moving relative to the driving unit, and the actuating mechanism 33 is capable of at least urging the second engaging portion 32 to approach and engage with the first engaging portion 31; one of the first engagement portion 31 and the second engagement portion 32 is provided at the first output shaft 13, and the other is provided at the second output shaft 23. In this way, the transmission of torque is realized by adopting the meshing tooth structure, selective meshing transmission of the first meshing part 31 and the second meshing part 32 can be realized by the actuating mechanism 33, and the power driving system can be switched between the first mode and the second mode, so that stable and smooth torque transmission is facilitated, and the switching between the decoupling state and the coupling state of the power coupling structure 30 is also facilitated.

Of course, in other embodiments, transmission modes such as a meshing gear structure, for example, a friction wheel transmission mode, a hydraulic transmission mode and the like, may be omitted, wherein the friction wheel transmission mode can refer to a continuously variable transmission (CVT, continuously variable transmission), and the hydraulic transmission mode can refer to a hydraulic torque converter. Specifically, alternatively, the friction wheel transmission structure includes two transmission wheels, a transmission belt arranged between the two transmission wheels, the actuating mechanism 33 includes a buffer wheel coaxially and parallelly arranged with the transmission wheels, and an actuating member capable of promoting the transmission belt to transversely move, the two transmission wheels are respectively arranged on the first output shaft 13 and the second output shaft 23, when the power driving system is in the first mode, the transmission belt is sleeved on the buffer wheel, and at this time, the two transmission wheels rotate independently; when the actuating piece drives the transmission belt to transversely move from the buffer wheel to the transmission wheels, the two transmission wheels realize coupling linkage through the transmission belt, and the power driving system enters a second mode; when the actuating member causes the drive belt to traverse from the drive wheel to the buffer wheel, the two drive wheels are decoupled and the power drive system is restored to the first mode.

In the fourth embodiment and the sixth embodiment, as shown in fig. 4, 6 and 8 to 10, alternatively, the first engaging portion 31 and the second engaging portion 32 are distributed along the radial direction of the first output shaft 13, the first engaging portion 31 is provided with a first tooth 311 on the outer circumferential surface, the second engaging portion 32 is provided with a second tooth 321 on the inner circumferential surface, and the second tooth 321 is capable of moving along the first direction and is engaged with the first tooth 311 in a sleeved manner.

Of course, referring to fig. 5, 7 and 11, in the fifth and seventh embodiments, the first engagement portion 31 and the second engagement portion 32 may be distributed along the axial direction of the first output shaft 13, the first tooth portion 311 may be provided on the end surface of the first engagement portion 31, the second tooth portion 321 may be provided on the end surface of the second engagement portion 32, and the second tooth portion 321 may be movable in the first direction and may be engaged with the first tooth portion 311 in an abutting manner.

Specifically, referring to fig. 4 and 8 to 10, the peripheral side surface of the second engagement portion 32 in fig. 8 to 10 does not show an external spline structure. In the fourth embodiment, alternatively, the first tooth portion 311 and the second tooth portion 321 are configured as a combined tooth structure, the second tooth portion 321 is provided with the lead-in angle 326, and the extending direction of the lead-in angle 326 is disposed intersecting with the axial direction of the second output shaft 23. In this way, smoothness when the second tooth portion 321 is sleeved in the first tooth portion 311 can be improved, and risk of collision damage of the first tooth portion 311 and the second tooth portion 321 is reduced. It should be noted that the structure of the lead-in angle 326 is well known in the transmission art, and therefore, the present application will not be described in detail herein.

Referring to fig. 4 and 5, in the fourth embodiment and the fifth embodiment, alternatively, the first output shaft 13 includes a first shaft section 131 and a second shaft section 132 that are connected, the first shaft section 131 is connected with the first driving unit 10 (that is, the driven gear of the final stage wheel set of the first reduction gear set 12 is disposed on the peripheral side surface of the first shaft section 131), the second output shaft 23 includes a third shaft section 231, the third shaft section 231 is provided with a mounting cavity 23a into which the second shaft section 132 extends, and the first tooth portion 311 and the second tooth portion 321 are both disposed in the mounting cavity 23a. That is, the third shaft section 231 is designed in a shaped shaft structure and is formed with the mounting cavity 23a capable of accommodating the first and second teeth 311 and 321, so that the first and second teeth 311 and 321 can be protected. Of course, in other embodiments, the mounting cavity 23a may not be provided, as in the embodiments of fig. 6 or 7.

Referring to fig. 4, in the fourth embodiment, alternatively, the first engaging portion 31 and the second engaging portion 32 are distributed along the radial direction of the first output shaft 13, the second engaging portion 32 is slidably disposed on the inner side surface of the mounting cavity 23a, the actuating mechanism 33 is disposed on the third shaft section 231, and the first engaging portion 31 is fixedly disposed on the peripheral side surface of the second shaft section 132.

Referring to fig. 4, in the fourth embodiment, alternatively, the inner side surface of the mounting cavity 23a is provided with an internal spline, and the peripheral side surface of the second engagement portion 32 is provided with an external spline, and the external spline is adapted to the internal spline. Thus, the structure is simple and easy to realize. Of course, in other embodiments, other forms of sliding movement of the second engagement portion 32 on the mounting cavity 23a may be employed, which is not particularly limited in this application.

Referring to fig. 4 and 5, in the fourth embodiment and the fifth embodiment, optionally, the third shaft section 231 includes a first casing portion 233 and a second casing portion 234 that are spliced together, the first casing portion 233 and the second casing portion 234 jointly enclose the mounting cavity 23a, the second casing portion 234 is disposed adjacent to the first shaft section 131, and the actuating mechanism 33 is disposed on the first casing portion 233. Thus, the first and second casing portions 233 and 234, which are provided separately, facilitate the formation of the mounting chamber 23a, and also facilitate the mounting of the second engagement portion 32 and the actuating mechanism 33 in the mounting chamber 23a. Of course, in other embodiments, the third shaft section 231 may be integrally formed and the mounting cavity 23a may be formed.

Referring to fig. 4, in the fourth embodiment, alternatively, the inner side surface of the first casing 233 is provided with an internal spline, and the external spline of the second engagement portion 32 is slidably disposed on the internal spline of the first casing 233.

Of course, the second engaging portion 32 may be provided on other parts, for example, referring to fig. 5, in the fifth embodiment, alternatively, the first engaging portion 31 and the second engaging portion 32 are distributed along the axial direction of the first output shaft 13, the second engaging portion 32 is slidably provided on the peripheral side surface of the second shaft section 132, the first engaging portion 31 is the second shell portion 234, and the first tooth portion 311 is provided on the end surface of the second shell portion 234 near the mounting cavity 23a.

Specifically, referring to fig. 5, in the fifth embodiment, optionally, a first flat key 133 is disposed on a peripheral side surface of the second shaft section 132, the second engaging portion 32 is provided with sliding key grooves 322 corresponding to the first flat key 133, and the sliding key grooves 322 penetrate through opposite end surfaces of the second engaging portion 32, so that the sliding key grooves 322 can slide on the first flat key 133 along the first direction. Thus, the structure is simple and easy to realize. Note that, the second engagement portion 32 in fig. 11 does not show the structure of the sliding key groove 322, but only shows the structure of the end face teeth. Of course, in other embodiments, other forms of sliding movement of the second engagement portion 32 on the second shaft section 132 may be employed, which is not particularly limited in this application.

Referring to fig. 4 and 5, in the fourth embodiment and the fifth embodiment, optionally, the power coupling structure 30 further includes an elastic restoring member 34 disposed in the mounting cavity 23a, the elastic restoring member 34 connects the second engaging portion 32 and the third shaft section 231, and when the actuating mechanism 33 drives the second engaging portion 32 to approach the first engaging portion 31, the elastic deformation amount of the elastic restoring member 34 increases. That is, the second engagement portion 32 can be brought to a position where the first engagement portion 31 is separated by the elastic restoring member 34, thereby improving the response rate and reliability of the decoupling operation. Of course, in other embodiments, the resilient return member 34 may not be provided.

Specifically, the elastic restoring member 34 may be arranged in various ways, for example, referring to fig. 4, in the fourth embodiment, alternatively, one end of the elastic restoring member 34 is connected to one side of the second engaging portion 32 near the second casing portion 234, and the other end is connected to the second casing portion 234. Referring to fig. 5, in the fifth embodiment, alternatively, one end of the elastic restoring member 34 is connected to a side of the second engagement portion 32 away from the first engagement portion 31, and the other end is connected to the first casing portion 233.

Referring to fig. 4 and 5, in the fourth and fifth embodiments, further alternatively, the first housing portion 233 is provided with a first bearing 41 on a peripheral side surface thereof, and is coupled to the vehicle body through the first bearing 41; the second shell portion 234 is provided with a second bearing 42 at a peripheral side thereof and is coupled to the vehicle body through the second bearing 42; the driven gear of the final stage wheel group of the second reduction gear group is provided at the peripheral side surface of the first casing portion 233. In this way, the mounting of the third shaft section 231 is achieved through the first bearing 41 and the second bearing 42, and the rotational stability and smoothness thereof can be improved.

Referring to fig. 4 and 5, in the fourth embodiment and the fifth embodiment, alternatively, the actuating mechanism 33 includes a pin 331 and a driving member, the bottom wall of the mounting cavity 23a is provided with a yielding hole 23b, a first end of the pin 331 passes through the yielding hole 23b and extends into the mounting cavity 23a and can abut against the second engaging portion 32, and a second end of the pin 331 is located outside the mounting cavity 23a and is driven by the driving member.

Referring to fig. 4 and 5, in the fourth embodiment and the fifth embodiment, optionally, the actuating mechanism 33 further includes a shift fork 332 movably disposed on the third shaft section 231, one end of the shift fork 332 is connected to the driving member, and the other end is connected to the second end of the pin 331. The driving member may be a linear motor or a cylinder, a hydraulic cylinder, or the like. That is, a mechanical transmission is achieved through the fork 332 to transmit the force of the driving member to the pin 331 and to cause the pin 331 to move in the first direction. Thus, the structure is simple and easy to realize. After the shifting fork 332 is reset, the elastic potential energy accumulated by the elastic reset element 34 can promote the second engagement portion 32 and the pin 331 to reset, and the power coupling structure 30 is in a decoupled state. It should be noted that, the matching structure of the shift fork 332 and the driving member in this embodiment may refer to the shift fork 332 structure used in the transmission of the vehicle in the prior art, and the related scheme is relatively mature, so that the application will not be repeated here.

Of course, other driving manners may be adopted, for example, in other embodiments, the driving member includes an electromagnet, the material of the pin shaft 331 is configured to be a magnetic material such as neodymium iron boron, and when the electromagnet is energized, a repulsive force can be generated on the pin shaft 331, and the pin shaft 331 is caused to push the second engaging portion 32 to engage the first engaging portion 31, so that the power coupling structure 30 enters the coupled state; when the electromagnet is powered off, the repulsive force to the pin 331 can be removed, and the second engagement portion 32 is urged to be disengaged from the first engagement portion 31 by the elastic restoring member 34.

Referring to fig. 6 and 7, in the sixth embodiment and the seventh embodiment, alternatively, the first output shaft 13 includes a first shaft section 131 and a second shaft section 132 that are connected, the first shaft section 131 is connected with the first driving unit 10, the second output shaft 23 includes a third shaft section 231 and a fourth shaft section 232, the third shaft section 231 is connected with the second driving unit 20, the second shaft section 132 and the fourth shaft section 232 are disposed opposite and adjacent to each other, one of the second shaft section 132 and the fourth shaft section 232 is provided with the second engaging portion 32, and the other is provided with the first engaging portion 31.

Referring to fig. 6, in the sixth embodiment, alternatively, the first engaging portion 31 and the second engaging portion 32 are distributed along the radial direction of the first output shaft 13, the second engaging portion 32 is provided with a first internal spline 323 and a second internal spline 324 at intervals along the first direction, the first engaging portion 31 is provided with a first external spline 312 corresponding to the first internal spline 323, the second shaft section 132 is provided with a second external spline 134 corresponding to the second internal spline 324, and the second external spline 134 is slidably sleeved on the second internal spline 324; the first external spline 312 is a first tooth 311, and the first internal spline 323 is a second tooth 321. In this manner, the structure is simple and easy to implement, and the second engagement portion 32 is facilitated to be mounted on the second shaft section 132 and the fourth shaft section 232. Of course, in other embodiments, other forms of sliding movement of the second engagement portion 32 over the second shaft section 132 may be employed, as the application is not specifically limited.

Referring to fig. 6, in a sixth embodiment, further optionally, the fourth shaft section 232 is provided with a shaft cavity 23c, the end of the second shaft section 132 is provided with a supporting step 135, the supporting step 135 extends into the shaft cavity 23c at least partially, and the power driving system further includes a third bearing 43, and the third bearing 43 is disposed between the inner side surface of the shaft cavity 23c and the supporting step 135. In this way, the fourth shaft section 232 is supported by the support step 135, and the second shaft section 132 is supported by the third bearing 43 to be freely rotatable with respect to the fourth shaft section 232 when the power coupling structure 30 is in the decoupled state. Of course, the bearing step 135 and the third bearing 43 may not be provided, and the second shaft section 132 and the fourth shaft section 232 may be spaced apart in the first direction, as in the embodiment shown in fig. 7.

Referring to fig. 7, in the seventh embodiment, alternatively, the second shaft section 132 and the fourth shaft section 232 are disposed at intervals in the first direction, the first engaging portion 31 and the second engaging portion 32 are distributed along the axial direction of the first output shaft 13, the second engaging portion 32 is slidably disposed on the circumferential side surface of the second shaft section 132, and the first engaging portion 31 is fixedly disposed on the circumferential side surface of the fourth shaft section 232. Alternatively, the second engagement portion 32 is also slidably provided on the peripheral side surface of the second shaft section 132 in a spline connection. Of course, in other embodiments, other forms of sliding movement of the second engagement portion 32 over the second shaft section 132 may be employed, as the application is not specifically limited.

Referring to fig. 6 and 7, in the sixth embodiment and the seventh embodiment, alternatively, the actuating mechanism 33 includes a push-pull member 333 and a driving member, the second engaging portion 32 is provided with a force slot 325 corresponding to the push-pull member 333, a first end of the push-pull member 333 is inserted into the force slot 325, and a second end of the push-pull member 333 is exposed outside the force slot 325 and is driven by the driving member. In this way, the structure is simple and easy to implement, and the mounting of the actuation mechanism 33 is facilitated.

In the sixth embodiment and the seventh embodiment, alternatively, the driving member may be a linear motor or an air cylinder, a hydraulic cylinder, or the like, that is, with the cooperation structure of the push-pull member 333 and the force receiving groove 325, it is possible to transmit the displacement of the telescopic rod of the linear motor to the second engagement portion 32 and urge the second engagement portion 32 toward or away from the first engagement portion 31 in the first direction. Thus, the structure is simple and easy to realize.

Of course, the push-pull member 333 may be configured as a shift fork 332, that is, the force and displacement of the driving member may be indirectly transmitted to the second engaging portion 32 by the shift fork 332; the push-pull member 333 may be driven to move by an electromagnet, and the related solution is referred to the fourth embodiment and the fifth embodiment, and will not be described herein.

The invention also provides a chassis architecture, which comprises the power driving system, and the specific structure of the power driving system refers to the above embodiment.

The invention also provides a vehicle, which comprises the power driving system, and the specific structure of the power driving system refers to the embodiment, and because the vehicle adopts all the technical schemes of all the embodiments, the vehicle at least has all the beneficial effects brought by the technical schemes of the embodiments, and the description is omitted herein.

Wherein optionally, the vehicle includes including automobile body, first drive wheel, second drive wheel and aforesaid power drive system, and first drive wheel and second drive wheel divide to locate the relative both sides of automobile body, and power drive system's first output shaft is connected with first drive wheel, and the second output shaft is connected with the second drive wheel.

The foregoing description is only of the optional embodiments of the present invention, and is not intended to limit the scope of the invention, and all the equivalent structural changes made by the description of the present invention and the accompanying drawings or the direct/indirect application in other related technical fields are included in the scope of the invention.

Claims (16)

1. A power drive system, the power drive system comprising:

a drive unit including a first drive unit having a first output shaft and a second drive unit having a second output shaft; and

the power coupling structure is arranged between the first driving unit and the second driving unit, the power driving system is provided with a first mode and a second mode, and in the first mode, the first driving unit independently drives the first output shaft and the second driving unit independently drives the second output shaft; in the second mode, the first driving unit is linked with the second driving unit through the power coupling structure, so that power of the first driving unit and the second driving unit can be intensively output through the first output shaft or the second output shaft.

2. The power drive system of claim 1, wherein the power coupling structure is disposed between the first output shaft and the second output shaft, the first output shaft being coupled to the second output shaft by the power coupling structure in the second mode.

3. The power drive system of claim 2, wherein the axis of the first output shaft extends in a first direction, the power coupling structure including a first engagement portion, a second engagement portion, and an actuating mechanism, the first engagement portion being fixed relative to the drive unit and the second engagement portion being movable relative to the drive unit in the first direction, the actuating mechanism being capable of urging at least the second engagement portion toward and into engagement with the first engagement portion; one of the first engagement portion and the second engagement portion is provided at the first output shaft, and the other is provided at the second output shaft.

4. The power drive system according to claim 3, wherein the first engagement portion and the second engagement portion are distributed in a radial direction of the first output shaft, an outer peripheral surface of the first engagement portion is provided with a first tooth portion, an inner peripheral surface of the second engagement portion is provided with a second tooth portion, and the second tooth portion is movable in the first direction and is engaged with the first tooth portion in a socket manner;

or the first meshing part and the second meshing part are distributed along the axial direction of the first output shaft, the end face of the first meshing part is provided with a first tooth part, the end face of the second meshing part is provided with a second tooth part, and the second tooth part can move along the first direction and is in abutting engagement with the first tooth part.

5. The power drive system of claim 4, wherein the first output shaft includes a first shaft section and a second shaft section connected, the first shaft section being connected to a first drive unit, the second output shaft including a third shaft section having a mounting cavity into which the second shaft section extends, the first tooth and the second tooth each being disposed within the mounting cavity.

6. The power drive system of claim 5, wherein the first engagement portion and the second engagement portion are distributed along a radial direction of the first output shaft, the second engagement portion is slidably disposed on an inner side surface of the mounting cavity, the actuating mechanism is disposed on the third shaft section, and the first engagement portion is fixedly disposed on a peripheral side surface of the second shaft section.

7. The power drive system of claim 6, wherein an inner side of the mounting cavity is provided with an inner spline, and a peripheral side of the second engagement portion is provided with an outer spline, the outer spline being fitted in the inner spline.

8. The power drive system of claim 5, wherein the third shaft section includes first and second spliced housing portions that collectively enclose the mounting cavity, the second housing portion being disposed adjacent the first shaft section, the actuation mechanism being disposed on the first housing portion.

9. The power drive system according to claim 8, wherein the first engagement portion and the second engagement portion are distributed in an axial direction of the first output shaft, the second engagement portion is slidably provided on a peripheral side surface of the second shaft section, the first engagement portion is the second shell portion, and the first tooth portion is provided on an end surface of the second shell portion near the mounting chamber.

10. The power drive system of claim 5, wherein the power coupling structure further comprises an elastic restoring member disposed in the mounting cavity, the elastic restoring member connecting the second engagement portion and the third shaft section, the elastic restoring member having an increased amount of elastic deformation when the actuating mechanism urges the second engagement portion toward the first engagement portion.

11. The power driving system as claimed in claim 5, wherein the actuating mechanism comprises a pin shaft and a driving member, a bottom wall of the installation cavity is provided with a yielding hole, a first end of the pin shaft passes through the yielding hole and stretches into the installation cavity and can abut against the second engagement portion, and a second end of the pin shaft is located outside the installation cavity and is driven by the driving member.

12. The power drive system of claim 11, wherein the actuating mechanism further comprises a fork movably disposed in the third shaft section, one end of the fork being connected to the driving member and the other end being connected to the second end of the pin;

or the driving piece comprises an electromagnet, the material of the pin shaft is configured to be a magnetic material, and when the electromagnet is electrified, repulsive force can be generated on the pin shaft, and the pin shaft is driven to push the second meshing part to mesh with the first meshing part.

13. The power drive system of claim 4, wherein the first output shaft includes first and second connected shaft segments, the first shaft segment being connected to a first drive unit, the second output shaft including third and fourth shaft segments, the third shaft segment being connected to a second drive unit, the second and fourth shaft segments being disposed opposite one another, one of the second and fourth shaft segments being provided with the second engagement portion and the other being provided with the first engagement portion.

14. The power drive system of claim 13, wherein the first engagement portion and the second engagement portion are distributed along a radial direction of the first output shaft, the second engagement portion is provided with a first internal spline and a second internal spline at intervals along the first direction, the first engagement portion is provided with a first external spline corresponding to the first internal spline, the second shaft section is provided with a second external spline corresponding to the second internal spline, and the second external spline is slidably sleeved on the second internal spline; the first external spline is the first tooth part, and the first internal spline is the second tooth part;

and/or the second shaft section and the fourth shaft section are arranged at intervals in the first direction, the first meshing part and the second meshing part are distributed along the axial direction of the first output shaft, the second meshing part is slidably arranged on the peripheral side surface of the second shaft section, and the first meshing part is fixedly arranged on the peripheral side surface of the fourth shaft section;

and/or the actuating mechanism comprises a push-pull piece and a driving piece, the second meshing part is provided with a stress groove corresponding to the push-pull piece, the first end of the push-pull piece is inserted into the stress groove, and the second end of the push-pull piece is exposed out of the stress groove and is driven by the driving piece.

15. Chassis architecture comprising a power drive system according to any of claims 1 to 14.

16. A vehicle comprising a power drive system according to any one of claims 1 to 14 or comprising a chassis architecture according to claim 15.