CN108237904B

CN108237904B - Drive shaft locking device, power drive system and vehicle

Info

Publication number: CN108237904B
Application number: CN201611226797.2A
Authority: CN
Inventors: 李俊锋; 凌和平; 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: 2021-02-23
Anticipated expiration: 2036-12-27
Also published as: CN108237904A

Abstract

The invention discloses a drive shaft locking device, a power drive system and a vehicle, wherein the drive shaft locking device comprises: a planetary gear mechanism; the power joint device comprises a first joint part and a second joint part, the first driving shaft is connected with the sun gear and rotates synchronously with the first joint part, and the second driving shaft is connected with the gear ring and rotates synchronously with the second joint part; a joint drive device, the joint drive device comprising: the driving part is used for driving the driving needle to drive the second joint part to move towards the direction close to the first joint part along the axial direction, so that the second joint part is jointed with the first joint part; the second joint part rotates along with the sleeve and can axially move relative to the sleeve; an elastic device elastically disposed between the second engaging portion and the sleeve. 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 power engagement device, the power engagement device including a first engagement portion and a second engagement portion, the first drive shaft being connected to the sun gear and further arranged to rotate in synchronism with the first engagement portion, the second drive shaft being connected to the ring gear, the second drive shaft further arranged to rotate in synchronism with the second engagement portion; 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 planet carrier and can move axially relative to the planet carrier, two ends of the driving needle are respectively matched with the driving part and the second joint part, and the driving part is arranged to drive the driving needle to drive the second joint part to move towards the direction close to the first joint part along the axial direction, so that the second joint part is jointed with the first joint part; a sleeve connected between the ring gear and the second drive shaft, the second engagement portion rotating with the sleeve and being axially movable relative to the sleeve; a resilient means resiliently disposed between the second engagement portion and the sleeve to cause the second engagement portion to have a tendency to move in a direction away from the first engagement portion.

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 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 second engagement portion engages the first 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 driving shaft is connected with the sun gear, the second driving shaft is connected with the gear ring, and the driving needle penetrates through the planet carrier; the planet gear is arranged on the planet carrier through a planet gear shaft, and the driving needle and the planet gear shaft are the same component.

In some examples of the invention, the first driving shaft is connected with the sun gear, the second driving shaft is connected with the gear ring, and the driving needle penetrates through the planet carrier; the planet wheel is mounted on the planet carrier through a planet wheel shaft, and the driving needle is spaced from the planet wheel shaft.

In some examples of the present invention, the two planetary carriers are respectively disposed at two sides of the sun gear, and the driving pin penetrates through the two planetary carriers.

In some examples of the invention, the sleeve is provided with a sleeve axial groove, the second engagement portion is provided with a second engagement portion projection, and the second engagement portion projection is provided in the sleeve axial groove so that the second engagement portion is rotatable with the sleeve and axially movable relative to the sleeve.

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

In some examples of the invention, the first engagement formation and the second engagement formation are both received within the sleeve.

In some examples of the invention, the resilient means is a coil spring and is fitted over the first drive shaft.

In some examples of the present invention, the first engagement portion is fitted over and fixed to the first drive shaft, and the coil spring is located outside the first engagement portion.

In some examples of the invention, the resilient device is received within the sleeve.

In some examples of the invention, the first engaging portion has a plurality of circumferentially distributed first engaging teeth, and the second engaging portion has a plurality of circumferentially distributed second engaging teeth.

In some examples of the invention, the ring gear has an integrally formed annular extension constituting the sleeve.

In some examples of the invention, a plurality of arc-shaped connecting strips are arranged between the gear ring and the sleeve, are distributed at intervals along the circumferential direction and are respectively welded and fixed with the gear ring and the sleeve.

In some examples of the invention, the first driving shaft is connected with the sun gear, the second driving shaft is connected with the gear ring, and the driving needle penetrates through the planet carrier; the planet carrier is provided with a plurality of convex plates which are distributed at intervals along the circumferential direction, the convex plates are divided into a first convex plate and a second convex plate, the first convex plates and the second convex plates are arranged in a staggered mode in the circumferential direction, the first convex plates are used for mounting a planet wheel shaft, and the second cam is provided with a driving needle supporting hole used for supporting the driving needle.

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 a drive shaft locking device according to an embodiment of the present invention;

FIG. 4 is a schematic structural view of the follower portion;

FIG. 5 is a schematic view of the sleeve and the second drive shaft;

FIG. 6 is a cross-sectional view of a drive shaft locking arrangement according to an embodiment of the present invention;

FIG. 7 is a schematic illustration of a power drive system according to an embodiment of the present invention;

FIG. 8 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; a first convex plate 131; a second flange 132; a ring gear 14;

a first drive shaft 20;

a second drive shaft 30;

a power engagement device 40; the first engaging portion 41; the first engaging tooth 411; the second engaging portion 42; the second engaging portion protrusion 421; the second engaging tooth 422;

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 sleeve 60; a sleeve axial slot 61; an arc-shaped connecting strip 62;

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, an engagement section drive device 50, a sleeve 60, and an elastic device 70.

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 coupling device 40 includes a first coupling portion 41 and a second coupling portion 42, the first drive shaft 20 is connected to the sun gear 11, and the first drive shaft 20 is also arranged to rotate synchronously with the first coupling portion 41 (i.e., at the same speed and in the same direction), the second drive shaft 30 is connected to the ring gear 14, and the second drive shaft 30 is also arranged to rotate synchronously with the second coupling portion 42 (i.e., at the same speed and in the same direction).

The joint driving device 50 may include: a driving pin 51 and a driving portion 52, the driving pin 51 being provided to be rotatable with the carrier 13 about the central axis of the sun gear 11, and the driving pin 51 being provided to be axially movable relative to the carrier 13.

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

That is, the planet carrier 13 can drive the driving needle 51 to synchronously rotate, and the driving portion 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 second engaging portion 42, so that the driving needle 51 can synchronously drive the second engaging portion 42 to move from left to right, the second engaging portion 42 is continuously close to the first engaging portion 41 until the second engaging portion 42 is engaged with the first engaging portion 41, wherein when the first engaging portion 41 is engaged with the second engaging portion 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 side of the slip can be output through the other side, and the escape of the vehicle can be facilitated.

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, so that the driving shaft locking device 100 has a simple structure, reliable functions, few parts, a small volume and low cost.

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.

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 second engaging part 42 to engage with the first engaging part 41. 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 bring the second engaging part 42 gradually closer to the first engaging part 41 until the second engaging part 42 is engaged with the first engaging part 41.

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. 4, the driving 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 second engaging portion 42, the axial movement of the second engaging portion 42 may be reliably made, and the operation of the drive shaft locking device 100 may be more reliably made.

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. 4, 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. 4, the driving surface 523 may be provided with a driving surface limiting groove 523c, and one end of the driving pin 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.

According to an embodiment of the present invention, the first driving shaft 20 is connected to the sun gear 11, the second driving shaft 30 is connected to the ring gear 14, and the driving pin 51 is inserted through the carrier 13. The planet gears 12 are mounted on the planet carrier 13 by means of planet gear shafts, which may be the same component as the drive pins 51. Thus, by setting the length of the planetary gear shaft appropriately, the drive pin 51 can be omitted, and the planetary gear shaft can be reliably arranged on the carrier 13, so that the cost of the drive shaft locking device 100 can be reduced, and the number of parts of the drive shaft locking device 100 can be reduced.

Of course, the present invention is not limited thereto, and according to another embodiment of the present invention, the first driving shaft 20 is connected to the sun gear 11, the second driving shaft 30 is connected to the ring gear 14, and the driving pin 51 is inserted through the carrier 13. The planet gears 12 are mounted on the planet carrier 13 by planet gear shafts, with the drive pins 51 spaced from the planet gear shafts. Therefore, the driving needle 51 and the planet wheel shaft are two independent components, so that the change of the planet carrier 13 can be reduced, and the driving shaft locking device 100 can realize a corresponding locking function by reasonably arranging the driving needle 51. Alternatively, in this embodiment, the driver pin 51 is arranged in parallel with the planetary wheel shaft 13.

As shown in fig. 1, there may be two planetary carriers 13, and the two planetary carriers 13 are respectively disposed at two sides of the sun gear 11, and the driving pin 51 penetrates through the two planetary carriers 13. Therefore, the driving pin 51 needs to be engaged with the second engaging portion 42, so that the axial length of the driving pin 51 is large, and therefore, by arranging the two spaced planetary carriers 13, it is possible to advantageously ensure the arrangement stability of the driving pin 51, so that the structural reliability of the driving shaft locking device 100 can be improved, and the driving pin 51 can be installed with improved coaxiality and is not easily displaced during axial movement.

As shown in fig. 1, 3, 5, and 6, the drive shaft locking device 100 may further include: a sleeve 60, the sleeve 60 being connected between the ring gear 14 and the second drive shaft 30, the second engagement portion 42 rotating with the sleeve 60, and the second engagement portion 42 being axially movable relative to the sleeve 60. The sleeve 60 and the second drive shaft 30 may be an integral part, and then the sleeve 60 may be connected to the ring gear 14. Wherein the second engaging portion 42 rotates with the sleeve 60 so that the second engaging portion 42 can rotate synchronously with the second driving shaft 30 via the sleeve 60, and by arranging the second engaging portion 42 to be axially movable with respect to the sleeve 60, the second engaging portion 42 can be urged to be axially movable with respect to the first engaging portion 41 without affecting the sleeve 60 and the second driving shaft 30, so that the structural reliability and the operational reliability of the driving shaft locking device 100 can be improved.

Further, as shown in fig. 2 and 5, the sleeve 60 is provided with a sleeve axial groove 61, the second engaging portion 42 is provided with a second engaging portion protrusion 421, and the second engaging portion protrusion 421 is provided in the sleeve axial groove 61, so that the second engaging portion 42 can rotate with the sleeve 60, and the second engaging portion 42 is axially movable with respect to the sleeve 60. The sleeve axial groove 61 extends in the axial direction, which facilitates the axial movement of the second engaging portion protrusion 421 on the sleeve axial groove 61, and facilitates the limitation of the circumferential position of the second engaging portion protrusion 421, so that the sleeve 60 can drive the second engaging portion 42 to rotate synchronously. The sleeve axial grooves 61 may be plural, the plural sleeve axial grooves 61 may be uniformly distributed on the inner surface of the sleeve 60 at intervals, the second engaging portion protrusions 421 may be plural, and the plural second engaging portion protrusions 421 correspond to the plural sleeve axial grooves 61 one to one.

Wherein the second engaging portion 42 may be empty over the first drive shaft 20 as shown in fig. 1. The second engaging portion 42 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 second engaging portion 42.

Alternatively, as shown in fig. 1 and 6, both the first engaging portion 41 and the second engaging portion 42 may be received within the sleeve 60. Thus, the sleeve 60 can protect the first engagement portion 41 and the second engagement portion 42, and can prevent the lubricant oil of the first engagement portion 41 and the second engagement portion 42 from leaking out, thereby improving the structural reliability of the drive shaft locking device 100.

As shown in fig. 1, the drive shaft locking device 100 may further include: an elastic means 70, the elastic means 70 being elastically arranged between the second engagement portion 42 and the sleeve 60 to give the second engagement portion 42 a tendency to move away from the first engagement portion 41. It can be understood that when the locking state between the first driving shaft 20 and the second driving shaft 30 needs to be released, the second engaging portion 42 needs to be away from the first engaging portion 41, and at this time, the braking portion 522 stops the brake following portion 521, and the elastic device 70 can drive the second engaging portion 42 to move away from the first engaging portion 41, so that the second engaging portion 42 can be separated from the first engaging portion 41, so that the first driving shaft 20 and the second driving shaft 30 can return to the normal working state.

Preferably, the elastic means 70 may be a coil spring, and the coil spring is sleeved on the first driving shaft 20. Thus, the coil spring arrangement is reliable, and the overall reliability of the drive shaft locking apparatus 100 is good.

As shown in fig. 2, the first engaging portion 41 is sleeved and fixed on the first driving shaft 20, and the coil spring is located outside the first engaging portion 41. This can improve the structural reliability of the first engaging portion 41 and the first drive shaft 20 on the one hand, and can improve the arrangement reliability of the coil spring and the first engaging portion 41 on the other hand by making reasonable use of the radial space of the first drive shaft 20.

Alternatively, as shown in fig. 1 and 6, the resilient means 70 may be housed within the sleeve 60. The sleeve 60 may serve to receive the elastic means 70, which may improve the reliability of the arrangement of the elastic means 70.

According to an embodiment of the invention, as shown in fig. 2, the first engaging portion 41 has a plurality of circumferentially distributed first engaging teeth 411, and the second engaging portion 42 has a plurality of circumferentially distributed second engaging teeth 422. It is understood that the first engaging part 41 and the second engaging part 42 are engaged when the first engaging tooth 411 and the second engaging tooth 422 are engaged, and the fitting reliability of the first engaging part 41 and the second engaging part 42 can be improved by providing a plurality of first engaging teeth 411 and a plurality of second engaging teeth 422.

Alternatively, the second engaging portion 42 may be provided with a second engaging portion limiting groove, and one end of the driving pin 51 is located in the second engaging portion limiting groove. By providing the second engaging portion stopper groove, the reliability of the engagement between the second engaging portion 42 and the one end of the driving pin 51 can be improved, and the overall operational reliability of the driving shaft locking device 100 can be improved.

Among them, the ring gear 14 is arranged in various ways.

For example, the ring gear 14 may alternatively have an integrally formed annular extension constituting the sleeve 60. In this way, the ring gear 14 and the sleeve 60 are reliably connected to each other, and the difficulty in manufacturing the drive shaft locking device 100 can be reduced, and the cost of the drive shaft locking device 100 can be reduced.

Of course, the present invention is not limited to this, and as shown in fig. 2 and 3, a plurality of arc-shaped connecting strips 62 are disposed between the ring gear 14 and the sleeve 60, the plurality of arc-shaped connecting strips 62 are distributed at intervals in the circumferential direction, and the plurality of arc-shaped connecting strips 62 are welded and fixed to the ring gear 14 and the sleeve 60, respectively. That is, each of the arc-shaped connection strips 62 may serve to fixedly connect the ring gear 14 and the sleeve 60, and the connection strips are arranged in an arc shape such that they are fitted to the edges of the ring gear 14 and the sleeve 60, which may improve the overall structural reliability of the drive shaft locking device 100.

As shown in fig. 2, the first drive shaft 20 is connected to the sun gear 11, the second drive shaft 30 is connected to the ring gear 14, and the drive pin 51 is inserted through the carrier 13. The carrier 13 has a plurality of convex plates distributed at intervals in the circumferential direction, the plurality of convex plates are divided into a first convex plate 131 and a second convex plate 132, the plurality of first convex plates 131 and the plurality of second convex plates 132 are arranged alternately in the circumferential direction, the first convex plate 131 is used for mounting the planetary wheel shaft, and the second convex plate 132 is provided with a driving pin supporting hole for supporting the driving pin 51. Thus, the carrier 13 is provided with the planetary gear shafts and the driving pins 51 which do not interfere with each other, so that the reliability of the arrangement of the driving pins 51 on the carrier 13 can be ensured.

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

As shown in fig. 7 and 8, 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. 7, 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. 8, 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. 7.

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 axially moves towards one side of the second engaging part 42, so that the driving needle 51 can drive the second engaging part 42 to gradually approach the first engaging part 41 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 second joint part 42 to move axially in the direction away from the first joint part 41, in the process, the driving needle 51 moves axially along with the second joint part 42, the end, matched with the driving surface 523, of the driving needle 51 can slide gradually 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 power engagement device, the power engagement device including a first engagement portion and a second engagement portion, the first drive shaft being connected to the sun gear and further arranged to rotate in synchronism with the first engagement portion, the second drive shaft being connected to the ring gear, the second drive shaft further arranged to rotate in synchronism with the second engagement portion;

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 planet carrier and can move axially relative to the planet carrier, two ends of the driving needle are respectively matched with the driving part and the second joint part, and the driving part is arranged to drive the driving needle to drive the second joint part to move towards the direction close to the first joint part along the axial direction, so that the second joint part is jointed with the first joint part;

a sleeve connected between the ring gear and the second drive shaft, the second engagement portion rotating with the sleeve and being axially movable relative to the sleeve;

a resilient means resiliently disposed between the second engagement formation and the sleeve to give the second engagement formation a tendency to move in a direction away from the first engagement formation;

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 second engagement portion engages the first engagement portion.

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

a braking portion configured to brake the follower portion.

3. The drive shaft locking apparatus for a vehicle according to claim 2, characterized in that the braking portion is provided to brake the follower portion using electromagnetic force.

4. The drive shaft locking apparatus for a vehicle according to claim 3, 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.

5. The drive shaft locking apparatus for a vehicle according to claim 1, characterized in that the follower portion is idly fitted over the first drive shaft.

6. The drive shaft locking apparatus for a vehicle according to claim 1, wherein the drive surface is a slope or a curved surface.

7. The drive shaft locking device for a vehicle according to claim 1, 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.

8. The drive shaft locking device for a vehicle according to claim 7, characterized in that 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.

9. The drive shaft locking apparatus for a vehicle as claimed in claim 1, 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.

10. The drive shaft locking apparatus for a vehicle according to claim 1, wherein the first drive shaft is connected to the sun gear, the second drive shaft is connected to the ring gear, and the drive pin is inserted through the carrier;

the planet gear is arranged on the planet carrier through a planet gear shaft, and the driving needle and the planet gear shaft are the same component.

11. The drive shaft locking apparatus for a vehicle according to claim 1, wherein the first drive shaft is connected to the sun gear, the second drive shaft is connected to the ring gear, and the drive pin is inserted through the carrier;

the planet wheel is mounted on the planet carrier through a planet wheel shaft, and the driving needle is spaced from the planet wheel shaft.

12. The drive shaft locking apparatus for a vehicle according to claim 1, wherein the planetary carriers are two and disposed at both sides of the sun gear, respectively, and the drive pin penetrates the two planetary carriers.

13. The drive shaft locking apparatus for a vehicle according to claim 1, wherein a sleeve axial groove is provided on the sleeve, and a second engaging portion protrusion is provided on the second engaging portion, the second engaging portion protrusion being provided in the sleeve axial groove so that the second engaging portion is rotatable with the sleeve and axially movable relative to the sleeve.

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

15. The drive shaft locking apparatus for a vehicle according to claim 1, characterized in that the first engagement portion and the second engagement portion are each received in the sleeve.

16. The drive shaft locking apparatus for a vehicle according to claim 1, wherein the elastic means is a coil spring and is fitted over the first drive shaft.

17. The drive shaft locking apparatus for a vehicle according to claim 16, wherein the first engagement portion is fitted over and fixed to the first drive shaft, and the coil spring is located outside the first engagement portion.

18. The drive shaft locking apparatus for a vehicle according to claim 1, wherein the elastic means is housed in the sleeve.

19. The drive shaft locking apparatus for a vehicle according to claim 1, wherein the first engaging portion has a plurality of circumferentially distributed first engaging teeth, and the second engaging portion has a plurality of circumferentially distributed second engaging teeth.

20. The drive shaft locking apparatus for a vehicle according to claim 1, characterized in that the ring gear has an integrally formed annular extension portion that constitutes the sleeve.

21. The drive shaft locking apparatus for a vehicle according to claim 1, wherein a plurality of arc-shaped connecting strips are provided between the ring gear and the sleeve, and are distributed at intervals in a circumferential direction and are welded and fixed to the ring gear and the sleeve, respectively.

22. The drive shaft locking apparatus for a vehicle according to claim 1,

the first driving shaft is connected with the sun gear, the second driving shaft is connected with the gear ring, and the driving needle penetrates through the planet carrier;

the planet carrier is provided with a plurality of convex plates which are distributed at intervals along the circumferential direction, the convex plates are divided into a first convex plate and a second convex plate, the first convex plates and the second convex plates are arranged in a staggered mode in the circumferential direction, the first convex plates are used for mounting a planet wheel shaft, and the second convex plates are provided with driving needle supporting holes used for supporting the driving needles.

23. A power drive system, comprising:

the drive shaft locking device for a vehicle according to any one of claims 1 to 22;

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.

24. A vehicle characterized by comprising a power drive system according to claim 23.