CN108240420B

CN108240420B - Drive shaft locking device, power drive system and vehicle

Info

Publication number: CN108240420B
Application number: CN201611229294.0A
Authority: CN
Inventors: 凌和平; 贝明; 翟震; 黄长安; 罗永孟
Original assignee: BYD Co Ltd
Current assignee: BYD Co Ltd
Priority date: 2016-12-27
Filing date: 2016-12-27
Publication date: 2021-01-19
Anticipated expiration: 2036-12-27
Also published as: CN108240420A

Abstract

The invention discloses a driving shaft locking device, a power driving system and a vehicle, wherein the power shaft locking device comprises: a planetary gear mechanism; the friction plate type clutch comprises a first joint part and a second joint part, the planet carrier, the first driving shaft and the first joint part synchronously rotate, the first joint part can axially move relative to the first driving shaft, and the second driving shaft, the second joint part and the sun gear synchronously rotate; a joint drive device, the joint drive device comprising: the driving part is arranged for driving the driving needle to drive the first joint part to move towards the direction close to the second joint part along the axial direction, so that the first joint part is jointed with the second joint part. Thus, the drive shaft locking device can lock the two drive shafts, and the escaping capability of the vehicle can be improved.

Description

Drive shaft locking device, power drive system and vehicle

Technical Field

The invention relates to the technical field of vehicles, in particular to a driving shaft locking device for a vehicle, a power driving system with the driving shaft locking device and the vehicle with the power driving system.

Background

In the related technology, the new energy automobile adopts a distributed driving mode, two motors respectively drive wheels on two sides, and the rotating speed and the torque of the left wheel and the right wheel can be respectively and independently adjusted by a controller, so that a differential is omitted, but the left axle and the right axle still need to be locked under certain slippery road conditions to improve the trafficability of the automobile. If be applied to distributing type driven new energy automobile with traditional electronic locking differential, then wasted differential function of differential, traditional electronic locking differential structure is complicated moreover, and spare part is more, and occupation space is more.

Disclosure of Invention

The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. To this end, the present invention proposes a drive shaft locking device for a vehicle, which can lock two drive shafts and can facilitate the escape of the vehicle.

The invention further provides a power driving system.

The invention further provides a vehicle.

A drive shaft locking device for a vehicle according to the present invention includes: the planetary gear mechanism comprises a sun gear, a planet carrier and a gear ring; a first drive shaft, a second drive shaft, and a friction plate clutch including a first engagement portion and a second engagement portion, wherein the carrier is connected to the first drive shaft and the first engagement portion, respectively, to rotate the carrier, the first drive shaft, and the first engagement portion in synchronization, and the first engagement portion is movable in an axial direction relative to the first drive shaft, and the second drive shaft is connected to the sun gear and the second engagement portion to rotate the second drive shaft, the second engagement portion, and the sun gear in synchronization; an interface drive device, the interface drive device comprising: the driving needle can rotate around the central axis of the sun gear along with the gear ring and can move axially relative to the gear ring, two ends of the driving needle are respectively matched with the driving part and the first joint part, and the driving part is used for driving the driving needle to drive the first joint part to move along the axial direction towards the direction close to the second joint part, so that the first joint part is jointed with the second joint part.

According to the drive shaft locking device of the present invention, when the first engaging portion and the second engaging portion are engaged, the first drive shaft and the second drive shaft are locked to each other, and the first drive shaft and the second drive shaft can be rotated in synchronization, so that the vehicle can be facilitated to escape from the trouble. In addition, the first driving shaft and the second driving shaft can be locked by arranging the joint driving device and the power joint device, so that the driving shaft locking device has the advantages of simple structure, reliable function realization, few parts, small volume and low cost.

In addition, the drive shaft locking device according to the present invention may also have the following distinctive technical features:

in some examples of the present invention, the planetary carriers are two and disposed at both sides of the sun gear, respectively.

In some examples of the invention, the two planet carriers are divided into an axially fixed planet carrier fixed with the first drive shaft and an axially moving planet carrier axially movable with respect to the axially fixed planet carrier, the axially moving planet carrier being fixed with the first joint.

In some examples of the invention, the planet wheel has a planet wheel shaft, which is connected with the axially fixed planet carrier and the axially moving planet carrier, respectively, wherein the planet wheel shaft is in sliding connection with the axially moving planet carrier.

In some examples of the invention, a drive pin axial slot is provided on the gear ring, the drive pin being slidably disposed within the drive pin axial slot.

In some examples of the present invention, the drive shaft locking device further includes: a resilient means resiliently disposed between the first and second engagement portions to cause the first engagement portion to have a tendency to move in a direction away from the second engagement portion.

In some examples of the present invention, the driving part includes: a follower portion rotatable with the drive needle and actuable, the follower portion having a drive surface disposed thereon, the follower portion being actuable by sliding of the drive needle on the drive surface to cause the drive surface to drive the drive needle in the axial direction to move so that the first engagement portion engages the second engagement portion.

In some examples of the present invention, the driving part further includes: a braking portion configured to brake the follower portion.

In some examples of the present invention, the braking portion is configured to brake the follower portion using an electromagnetic force.

In some examples of the present invention, the driving portion is an electromagnetic brake, the following portion constitutes a braking member of the electromagnetic brake, and the braking portion constitutes a braking frame of the electromagnetic brake.

In some examples of the invention, the follower portion is free-sleeved on the first drive shaft.

In some examples of the invention, the drive surface is a chamfer or a curved surface.

In some examples of the invention, the drive face comprises: the connecting structure comprises a first section and a second section, wherein the first section is connected with the second section, the connecting position of the first section and the second section is the lowest point, and the other ends of the first section and the second section, which are far away from the connecting position, are the highest points.

In some examples of the invention, the follower portion comprises: the follow-up part comprises a follow-up part body and an annular follow-up part flange arranged on the follow-up part body, wherein the end face, facing the driving needle, of the follow-up part flange is provided with the driving surface.

In some examples of the present invention, the driving surface is provided with a driving surface limiting groove, and one end of the driving needle is located in the driving surface limiting groove.

In some examples of the invention, the first engagement portion is empty on the second drive shaft.

The power drive system according to the present invention includes: the drive shaft locking device for a vehicle; a first motor generator that is in transmission with the first drive shaft and that outputs power to one of a pair of wheels; a second motor generator that is in transmission with the second drive shaft and outputs power to the other of the pair of wheels.

The advantageous effects of the power drive system are the same as those of the drive shaft locking device, and are not described in detail herein.

The vehicle comprises the power driving system.

The beneficial effects of the vehicle are the same as those of the power drive system, and are not described in detail herein.

Drawings

FIG. 1 is a schematic view of a driveshaft lock device according to an embodiment of the invention;

FIG. 2 is an exploded view of a drive shaft locking arrangement according to an embodiment of the present invention;

FIG. 3 is a schematic structural view of the follower portion;

FIG. 4 is a schematic illustration of a power drive system according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of a power drive system according to an embodiment of the present invention.

Reference numerals:

a power drive system 1000;

a drive shaft locking device 100;

a planetary gear mechanism 10; a sun gear 11; a planet wheel 12; a carrier 13; an axially fixed planet carrier 131; axially moving the carrier 132;

a ring gear 14; drive pin axial slots 141;

a first drive shaft 20; a second drive shaft 30;

a power engagement device 40; the first engaging portion 41; the second engaging portion 42;

an engaging portion driving device 50; a driving needle 51; a drive section 52; a follower portion 521; a follower part body 521 a; follower portion flange 521 b;

a stopper 522;

a drive face 523; a first segment 523 a; a second segment 523 b; a driving surface limit groove 523 c;

a resilient means 70;

a first motor generator D1; a second motor generator D2; a third motor generator D3; a fourth motor generator D4;

left front wheel Z1; the left rear wheel Z2; the right front wheel Y1; the right rear wheel Y2.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

The driving shaft locking device 100 according to the embodiment of the present invention is described in detail below with reference to the accompanying drawings, the driving shaft locking device 100 may be applied to a vehicle, and is particularly suitable for a new energy vehicle using distributed driving, the driving shaft locking device 100 may be used to lock two driving shafts, so that left and right wheels may rotate synchronously, and the vehicle may be an electric vehicle, but is not limited thereto.

As shown in fig. 1 and 2, a drive shaft locking device 100 according to an embodiment of the present invention may include: a planetary gear mechanism 10, a first drive shaft 20, a second drive shaft 30, a power engagement device 40, and an engagement section drive device 50.

The planetary gear mechanism 10 includes a sun gear 11, planet gears 12, a carrier 13, and a ring gear 14, the planet gears 12 being rotatably mounted on the carrier 13, and the planet gears 12 being engaged between the sun gear 11 and the ring gear 14, whereby the planet gears 12 can transmit power between the sun gear 11 and the ring gear 14. Here, the planet wheel 12 may be a plurality of, for example, three, and three planet wheels 12 may be uniformly distributed about the central axis of the sun wheel 11. The planet carrier 13 may have a planet axle on which the planet wheels 12 are mounted.

The first drive shaft 20 and the second drive shaft 30 are two separate shafts, for example, the first drive shaft 20 may be in transmission with the left wheel and the second drive shaft 30 may be in transmission with the right wheel. The axes of the first drive shaft 20 and the second drive shaft 30 may be collinear. However, the present invention is not limited thereto, and for example, the first drive shaft 20 may be a right half shaft and the second drive shaft 30 may be a left half shaft.

The power engagement device 40 may be a friction plate clutch, which may include a first engagement portion 41 and a second engagement portion 42, wherein the friction plate clutch may include: a driving disk, which may be the first engaging portion 41, and a driven disk, which may be the second engaging portion 42.

As shown in fig. 1, the carrier 13 is connected to the first drive shaft 20 and the first joint portion 41, respectively, so that the carrier 13, the first drive shaft 20, and the first joint portion 41 rotate in synchronization, and the first joint portion 41 is movable in the axial direction relative to the first drive shaft,

the second driving shaft 30 may be connected to the sun gear 11 and the second joint 42, respectively, so that the second driving shaft 30, the second joint 42, and the sun gear 11 rotate in synchronization.

The joint driving device 50 may include: a driving pin 51 and a driving portion 52, the driving pin 51 being arranged to be rotatable with the ring gear 14 about the central axis of the sun gear 11, and the driving pin 51 being arranged to be axially movable relative to the ring gear 14.

The two ends of the driving pin 51 are respectively matched with the driving portion 52 and the first engaging portion 41, and the driving portion 52 is configured to drive the driving pin 51 to move axially, so that the driving pin 51 drives the first engaging portion 41 to move axially in a direction approaching the second engaging portion 41 (i.e. in a left-to-right direction shown in fig. 1), so that the first engaging portion 41 engages with the second engaging portion 42.

That is, the ring gear 14 can drive the driving pin 51 to rotate synchronously, for example, as shown in fig. 1, the ring gear 14 is provided with a driving pin axial groove 141, and the driving pin 51 can be slidably disposed in the driving pin axial groove 141. And the driving part 52 can drive the driving needle 51 to move from left to right, because one end of the driving needle 51 is matched with the first joint part 41, the driving needle 51 can synchronously drive the first joint part 41 to move from left to right, the first joint part 41 is continuously close to the second joint part 42 until the first joint part 41 is engaged with the second joint part 42, wherein when the first joint part 41 is engaged with the second joint part 42, the first driving shaft 20 and the second driving shaft 30 are locked with each other, the first driving shaft 20 and the second driving shaft 30 can synchronously rotate, so that the power on one slipping side can be output through the other side, and the vehicle can be conveniently released.

The traditional electric locking differential mechanism is added with an electric actuating locking mechanism on the basis of a common open differential mechanism, so that the differential mechanism has a locking function and is locked through an electric control differential mechanism. The electric locking differential mechanism is commonly applied to a centralized drive type fuel automobile, namely, power is distributed to a left half shaft and a right half shaft after passing through a main speed reducer and the differential mechanism, and the differential mechanism is used for adjusting the speed difference of the left wheel and the right wheel. But cannot be directly applied to electric vehicles, which are bulky and do not have an engine.

Thus, the driving shaft locking device 100 of the present invention is significantly different from the conventional electric locking differential in structure and implementation, and the first driving shaft 20 and the second driving shaft 30 can be locked by arranging the engaging portion driving device 50 and the power engaging device 40 (i.e., friction plate clutch), so that the driving shaft locking device 100 has a simple structure, reliable function, few parts, small volume and low cost. In which the engagement of the friction plate clutch is reliable and stable, and the operational reliability of the drive shaft locking device 100 can be improved.

Wherein, as shown in fig. 1, the planetary gear mechanism 10, the power coupling device 40, the first drive shaft 20 and the second drive shaft 30 are coaxially arranged. Therefore, the drive shaft locking device 100 can be made small in radial dimension, small in size, and small in occupied space.

According to a preferred embodiment of the present invention, as shown in fig. 1, there may be two planetary carriers 13, and the two planetary carriers 13 are respectively disposed at both sides of the sun gear 11. Thereby, it is possible to contribute to the structural reliability of the planetary gear mechanism 10, and it is also possible to contribute to the connection of the carrier 13 to the first drive shaft 20 and the first engagement portion 41, respectively, so that the structural reliability of the drive shaft locking device 100 can be improved, and the coaxiality of mounting of the drive pin 51 can be improved, and the shift during the axial movement is not easily caused.

Further, as shown in fig. 1, the two carriers 13 may be divided into an axially fixed carrier 131 and an axially moving carrier 132, the axially fixed carrier 131 being fixed to the first drive shaft 20, the axially moving carrier 132 being movable in the axial direction relative to the axially fixed carrier 131, the axially moving carrier 132 being fixed to the first engagement portion 41. That is, the axially fixed carrier 131 may be adapted to be fixed to the first drive shaft 20, and the axially movable carrier 132 may be adapted to be fixed to the first joint portion 41, so that the first joint portion 41 may be urged to move axially toward the second joint portion 42 by axial movement of the axially movable carrier 132 relative to the first drive shaft 20 and the axially fixed carrier 131, and the first drive shaft 20, the axially fixed carrier 131, the axially movable carrier 132, and the first joint portion 41 may be caused to rotate in synchronization.

Specifically, the planet gears 12 may have planet gear shafts that are respectively connected with the axially fixed planet carrier 131 and the axially moving planet carrier 132, wherein the planet gear shafts are in sliding connection with the axially moving planet carrier 132. This facilitates the axial movement of the axially movable carrier 132, and ensures the operational reliability of the drive shaft locking device 100.

Preferably, as shown in fig. 1, the drive shaft locking device 100 may further include: and an elastic means 70, the elastic means 70 being elastically disposed between the first engaging portion 41 and the second engaging portion 42 to make the first engaging portion 41 have a tendency to move in a direction away from the second engaging portion 42. Thus, the elastic device 70 can provide the first engaging portion 41 with a reverse force, and can urge the first engaging portion 41 to move axially in a direction away from the second engaging portion 42 until the first engaging portion 41 is completely separated from the second engaging portion 42, at which time the drive shaft locking device 100 releases the locking of the two drive shafts.

As shown in fig. 1, the driving part 52 may include: the follower 521 is capable of rotating along with the driving needle 51, the follower 521 can be braked, the follower 521 is provided with a driving surface 523, when the follower 521 is braked, the driving needle 51 slides on the driving surface 523 to change the contact and matching position of the driving needle 51 and the driving surface 523, so that the driving surface 523 drives the driving needle 51 to move in the axial direction to enable the first engaging part 41 to engage with the second engaging part 42. It will be understood that the follower 521 and the driving needle 51 may be in synchronous rotation before the follower 521 is not braked, but after the follower 521 is braked, the rotation speed of the follower 521 is reduced, and a rotation speed difference will occur between the follower 521 and the driving needle 51, so that the driving needle 51 can slide on the driving surface 523 of the follower 521, and the driving needle 51 after sliding can move axially relative to the planet carrier 13, so that the driving needle 51 can drive the first engaging part 41 to approach the second engaging part 42 gradually until the first engaging part 41 is engaged with the second engaging part 42.

Further, as shown in fig. 1, the driving part 52 may further include: a brake portion 522, the brake portion 522 is provided for braking the follower portion 521. That is, the braking portion 522 may function as the braking follower portion 521, and when it is necessary for the first engaging portion 41 and the second engaging portion 42 to engage, the braking portion 522 may brake the follower portion 521.

Preferably, the braking portion 522 may be provided to brake the following portion 521 using an electromagnetic force. The electromagnetic force control is accurate and reliable, so that the operational reliability of the drive shaft locking apparatus 100 can be improved, and the service life of the drive shaft locking apparatus 100 can be extended. For example, the driving unit 52 may be an electromagnetic brake, the follower unit 521 may constitute a brake member of the electromagnetic brake, and the brake unit 522 may constitute a brake frame of the electromagnetic brake. With the control manner of the electromagnetic brake and the planetary gear mechanism, the control system of the drive shaft locking device 100 can be simplified, and the system reliability can be made higher.

Alternatively, as shown in fig. 1, the follower 521 may be fitted over the first drive shaft 20 in a hollow manner. Thus, the engagement between the follower 521 and the driving pin 51 can be facilitated, and the axial length of the driving shaft locking device 100 can be reduced at least to some extent, and the volume of the driving shaft locking device 100 can be reduced.

According to one embodiment of the present invention, as shown in FIG. 3, drive surface 523 may be a sloped or curved surface. By providing drive surface 523 with a sloped or curved surface, sliding of drive needle 51 on drive surface 523 may be facilitated and drive needle 51 may be urged to move in an axial direction.

Further, the driving surface 523 may include: the first segment 523a is connected to the second segment 523b, the connection point of the first segment 523a and the second segment 523b is the lowest point, and the other ends of the first segment 523a and the second segment 523b far away from the connection point are the highest points. Thus, when the one end of the actuating pin 51 is at the lowest point, the first engaging portion 41 and the second engaging portion 42 are in the disengaged state, and when the one end of the actuating pin 51 is at or near the highest point, the first engaging portion 41 and the second engaging portion 42 are in the engaged state. This facilitates the sliding of the driving needle 51 between the lowest point and the highest point by properly arranging the driving surface 523, which facilitates the engagement of the first engaging part 41 and the second engaging part 42, and improves the operational reliability of the driving shaft locking device 100.

Preferably, each of the first segment 523a and the second segment 523b may be circular arc-shaped. The first segment 523a and the second segment 523b having the circular arc shape may facilitate sliding of one end of the driving needle 51 on the driving surface 523, and may reduce a movement resistance of the driving needle 51.

Optionally, the corresponding circle center angles of each of the first segment 523a and the second segment 523b are the same. In this way, the first segment 523a and the second segment 523b are substantially identical, thereby further facilitating the sliding of the driving needle 51 on the driving surface 523.

Alternatively, drive face 523 may be multi-segmented, with the multi-segmented drive face 523 spaced circumferentially apart. Thereby, the number of the driving pins 51 may correspond to the number of the driving surfaces 523, which may increase the number of the driving pins 51, so that the plurality of driving pins 51 may be reliably engaged with the first engaging portion 41, the second engaging portion 42 may be reliably moved in the axial direction, and the driving shaft locking device 100 may be more reliably operated.

The multi-section driving surfaces 523 can be connected with each other through a connecting plane, and the connecting plane is flush with the highest point. This can improve the structural reliability of the follower 521 on the surface of the driving surface 523 at least to some extent, and can improve the structural reliability of the drive shaft locking device 100.

According to an alternative embodiment of the present invention, as shown in fig. 3, the follower 521 may include: the follower portion includes a follower portion body 521a and an annular follower portion flange 521b provided on the follower portion body 521a, and a drive surface 523 is provided on an end surface of the follower portion flange 521b facing the drive needle 51. Thus, the follower body 521a can effectively enhance the structural reliability of the follower 521, and the driving surface 523 can be provided on the end surface of the follower flange 521b, so that the difficulty in designing the driving surface 523 can be reduced, and the structural reliability of the driving surface 523 can be improved.

Further, as shown in fig. 3, the driving surface 523 may be provided with a driving surface limiting groove 523c, and one end of the driving needle 51 is located in the driving surface limiting groove 523 c. Therefore, by providing the driving surface limiting groove 523c, one end of the driving needle 51 can be engaged in the driving surface limiting groove 523c, so that the one end of the driving needle 51 can be prevented from being disengaged from the driving surface 523 to at least a certain extent, and the moving reliability and stability of the driving needle 51 on the driving surface 523 can be improved.

Wherein, as shown in fig. 1, the first engaging portion 41 may be fitted over the second driving shaft 30 in a hollow manner. The first engagement portion 41 thus provided can contribute to a reduction in the axial dimension of the drive shaft locking device 100, and can contribute to a reduction in the volume of the drive shaft locking device 100, and in addition, can contribute to an improvement in the reliability of the arrangement of the first engagement portion 41.

A power drive system 1000 according to an embodiment of the present invention is described in detail below.

As shown in fig. 4 and 5, the power drive system 1000 may include the drive shaft locking device 100 for a vehicle, the first motor generator D1, and the second motor generator D2 of the above-described embodiment, the first motor generator D1 being in transmission with the first drive shaft 20, and the first motor generator D1 outputting power to one of the pair of wheels, the second motor generator D2 being in transmission with the second drive shaft 30, and the second motor generator D2 outputting power to the other of the pair of wheels. Thus, when the drive shaft locking device 100 locks the first drive shaft 20 and the second drive shaft 30, the two wheels are rotated in synchronization, and when the drive shaft locking device 100 does not lock the first drive shaft 20 and the second drive shaft 30, the first motor generator D1 and the second motor generator D2 are individually operated to drive the corresponding wheels to rotate at an appropriate rotation speed.

As shown in fig. 4, in the power drive system 1000, the drive shaft locking device 100 of the above embodiment may be applied to only one set of wheels. A first gear c1, a second gear c2, a third gear c3, a fourth gear c4, a fifth gear c5 and a sixth gear c6 are arranged between the first motor generator D1 and the left front wheel Z1, wherein the first gear c1 is fixed on a motor shaft of the first motor generator D1, the second gear c2 is meshed with the first gear c1, the second gear c2 is also coaxially fixed with the third gear c3, the third gear c3 is meshed with the fourth gear c4, the fourth gear c4 is fixed on the first driving shaft 20, a fifth gear c5 is also fixed on the first driving shaft 20, a sixth gear c6 is connected to a half shaft of the left front wheel Z1, the fifth gear c5 is meshed with the sixth gear c6, so that the power of the first motor generator D6 can be transmitted to the left front wheel Z6 through the three sets of meshed gears, and the first gear c6 and the first driving shaft 6 can also play a role in the transmission of course, The third gear c3 and the fourth gear c4 can play a role in reducing speed and increasing torque.

Of course, the present invention is not limited thereto, and as shown in fig. 5, the drive shaft locking device 100 of the above embodiment may be applied to two sets of wheels in the power drive system 1000. For example, the drive shaft locking devices 100 may be two, one drive shaft locking device 100 is fitted in the left and right front wheels Z1 and Y1, and the first motor generator D1 is driven with the first drive shaft 20 of the drive shaft locking device 100 and the second motor generator D2 is driven with the second drive shaft 30 of the drive shaft locking device 100.

Another drive shaft locking device 100 is fitted in the left rear wheel Z2 and the right rear wheel Y2, and the third motor generator D3 is in transmission with the first drive shaft 20 of the drive shaft locking device 100, and the fourth motor generator D4 is in transmission with the second drive shaft 30 of the drive shaft locking device 100.

The operation and principle of the drive shaft locking device 100 according to the embodiment of the present invention will be described in detail with reference to fig. 1 in conjunction with the specific embodiment shown in fig. 4.

When the vehicle is normally driven straight, the first motor generator D1 and the second motor generator D2 are operated individually, and the controller of the vehicle can control the first motor generator D1 and the second motor generator D2 to operate at the same speed and the same direction, so that the left front wheel Z1 and the right front wheel Y1 can rotate at the same speed and the same direction.

During normal turning of the vehicle, the controller may control the first motor generator D1 and the second motor generator D2 to rotate at the same direction and at different speeds, for example, during left turning, the speed of the first motor generator D1 may be lower than that of the second motor generator D2, and the speed of the right front wheel Y1 may be greater than that of the left front wheel Z1, so that left turning is achieved.

During the normal straight running and the normal turning running of the vehicle, under the action of the elastic device 70, one end of the driving needle 51 in the driving shaft locking device 100 is at the lowest point of the driving surface 523 of the follower 521, and at this time, the driving needle 51 and the follower 521 are in a synchronous rotation state.

When the vehicle is trapped and skidded, the driver controls the electromagnetic brake to be powered on, the brake frame brakes the brake component, the rotating speed of the brake component is restrained, a rotating speed difference is generated between the driving needle 51 and the brake component, the driving needle 51 slides on the driving surface 523 of the brake component, the driving needle 51 can slide from the lowest point to the highest point or a position close to the highest point of the driving surface 523, the driving needle 51 moves axially towards one side of the first engaging part 41, so that the driving needle 51 can drive the first engaging part 41 to gradually approach the second engaging part 42 until the first engaging part 41 is engaged with the second engaging part 42, and at the moment, the first driving shaft 20 and the second driving shaft 30 synchronously rotate, so that the trapping capacity of the vehicle can be improved.

When the vehicle is out of the way, the driver can press the electromagnetic brake again, the electromagnetic brake is powered off, the elastic device pushes the electromagnetic brake to axially move in the direction away from the second joint part 42, in the process, the driving needle 51 axially moves along with the first joint part 41, one end, matched with the driving surface 523, of the driving needle 51 can gradually slide from the highest point or the position close to the highest point to the lowest point, at the moment, the second joint part 42 and the first joint part 41 are completely separated, and the vehicle can continue to run according to the vehicle normal straight line running and vehicle normal turning running mode.

The vehicle according to the embodiment of the present invention includes the power drive system 1000 of the above embodiment.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims

1. A drive shaft lock device for a vehicle, characterized by comprising:

the planetary gear mechanism comprises a sun gear, a planet carrier and a gear ring;

a first drive shaft, a second drive shaft, and a friction plate clutch, the friction plate clutch including a first engagement portion and a second engagement portion, wherein the carrier is connected to the first drive shaft and the first engagement portion, respectively, to rotate the carrier, the first drive shaft, and the first engagement portion in synchronization, and the first engagement portion is movable in an axial direction with respect to the first drive shaft, the second drive shaft is connected to the sun gear and the second engagement portion to rotate the second drive shaft, the second engagement portion, and the sun gear in synchronization, and the first drive shaft and the second drive shaft are drivingly connected to different electric motors, respectively;

an interface drive device, the interface drive device comprising: the driving needle is arranged to rotate around the central axis of the sun gear along with the gear ring and can move axially relative to the gear ring, two ends of the driving needle are respectively matched with the driving part and the first joint part, and the driving part is arranged to drive the driving needle to drive the first joint part to move in the direction close to the second joint part along the axial direction, so that the first joint part is jointed with the second joint part;

the two planet carriers are respectively arranged on two sides of the sun gear;

two the planet carrier divide into axial fixity planet carrier and axial displacement planet carrier, the axial fixity planet carrier with first drive shaft is fixed, the axial displacement planet carrier is relative the axial fixity planet carrier can follow axial displacement, the axial displacement planet carrier with first junction is fixed.

2. The driveshaft lock device for a vehicle according to claim 1, wherein the planetary gear has a planetary gear shaft that is connected to the axially fixed carrier and the axially moving carrier, respectively, wherein the planetary gear shaft is in sliding connection with the axially moving carrier.

3. The drive shaft locking apparatus for a vehicle according to claim 1, wherein a drive pin axial groove is provided on the ring gear, and the drive pin is slidably disposed in the drive pin axial groove.

4. The drive shaft locking apparatus for a vehicle according to claim 1, characterized by further comprising: a resilient means resiliently disposed between the first and second engagement portions to cause the first engagement portion to have a tendency to move in a direction away from the second engagement portion.

5. The drive shaft locking device for a vehicle according to claim 1, characterized in that the drive portion includes:

a follower portion rotatable with the drive needle and actuatable, the follower portion having a drive surface disposed thereon, the follower portion being actuatable to move the drive needle in the axial direction by the drive surface as the drive needle slides on the drive surface when actuated, such that the first engagement portion engages the second engagement portion.

6. The drive shaft locking device for a vehicle according to claim 5, characterized in that the drive portion further comprises:

a braking portion configured to brake the follower portion.

7. The drive shaft locking apparatus for a vehicle according to claim 6, characterized in that the braking portion is provided to brake the follower portion using electromagnetic force.

8. The drive shaft locking apparatus for a vehicle according to claim 7, characterized in that the drive portion is an electromagnetic brake, the follower portion constitutes a brake member of the electromagnetic brake, and the brake portion constitutes a brake frame of the electromagnetic brake.

9. The drive shaft locking apparatus for a vehicle according to claim 5, characterized in that the follower portion is idly fitted over the first drive shaft.

10. The drive shaft locking apparatus for a vehicle according to claim 5, wherein the drive surface is a slope or a curved surface.

11. The drive shaft locking device for a vehicle according to claim 5, wherein the drive surface includes: the connecting structure comprises a first section and a second section, wherein the first section is connected with the second section, the connecting position of the first section and the second section is the lowest point, and the other ends of the first section and the second section, which are far away from the connecting position, are the highest points.

12. The drive shaft locking apparatus for a vehicle according to claim 11, wherein the follower portion includes: the follow-up part comprises a follow-up part body and an annular follow-up part flange arranged on the follow-up part body, wherein the end face, facing the driving needle, of the follow-up part flange is provided with the driving surface.

13. The drive shaft locking apparatus for a vehicle as claimed in claim 5, wherein a drive surface limit groove is provided on the drive surface, and one end of the driving pin is located in the drive surface limit groove.

14. The drive shaft locking apparatus for a vehicle according to claim 1, characterized in that the first engaging portion is empty-sleeved on the second drive shaft.

15. A power drive system, comprising:

the drive shaft locking device for a vehicle according to any one of claims 1 to 14;

a first motor generator that is in transmission with the first drive shaft and that outputs power to one of a pair of wheels;

a second motor generator that is in transmission with the second drive shaft and outputs power to the other of the pair of wheels.

16. A vehicle characterized by comprising the power drive system according to claim 15.