CN215921858U - Mechanical differential electric drive axle and vehicle - Google Patents

Abstract

The utility model discloses a mechanical differential electric drive axle and a vehicle, and relates to the technical field of axles. The mechanical differential electric drive bridge comprises a first motor, a first planetary reducer, a second motor, a second planetary reducer and a reverse rotation transmission mechanism. The first motor is in transmission connection with a first sun gear of the first planetary reducer and outputs torque through a first planet carrier of the first planetary reducer. The second motor and the second planetary reducer output torque through the second planetary reducer. The reverse rotation transmission mechanism is in transmission connection with a first gear ring and a second planetary reducer of the first planetary reducer respectively, and can reversely output the torque input by the first gear ring to the second planetary reducer. The mechanical differential electric drive axle and the vehicle have the characteristics of low cost and high reliability.

Description

Mechanical differential electric drive axle and vehicle

Technical Field

The utility model relates to the technical field of axles, in particular to a mechanical differential electric drive axle and a vehicle.

Background

The automobile axle is connected to the frame via suspension and has wheels installed to its two ends for bearing the load of the automobile and maintaining the normal running of the automobile on road.

Most of the existing electric drive bridges adopt electronic differentials, so that the reliability is low, the cost is high, and the requirements of long-time reliable operation and low cost are difficult to meet.

In view of the above, it is important to develop a mechanical differential electric drive axle and a vehicle capable of solving the above technical problems.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a mechanical differential electric drive axle and a vehicle, which have the characteristics of low cost and high reliability.

The utility model provides a technical scheme that:

in a first aspect, an embodiment of the present invention provides a mechanical differential electric drive bridge, which includes a first motor, a first planetary reducer, a second motor, a second planetary reducer, and a reverse rotation transmission mechanism;

the first motor is in transmission connection with a first sun gear of the first planetary reducer and outputs torque through a first planet carrier of the first planetary reducer; the second motor and the second planetary reducer output torque through the second planetary reducer;

the reverse rotation transmission mechanism is in transmission connection with a first gear ring of the first planetary speed reducer and the second planetary speed reducer respectively, and can reversely output the torque input by the first gear ring to the second planetary speed reducer.

With reference to the first aspect, in another implementation manner of the first aspect, the second motor is in transmission connection with a second sun gear of the second planetary reducer, and a second carrier of the second planetary reducer is used for outputting torque;

the reverse rotation transmission mechanism is in transmission connection with a second gear ring of the second planetary speed reducer so as to reversely output the torque input by the first gear ring to the second gear ring or reversely output the torque input by the second gear ring to the first gear ring.

With reference to the first aspect and the foregoing implementation manner of the first aspect, in another implementation manner of the first aspect, the reverse rotation transmission mechanism includes a first gear, a second gear, and a third gear;

the first gear is externally meshed with the third gear and externally meshed with the first gear ring; the second gear is externally meshed with the second gear ring; the third gear is in transmission connection with the second gear so as to reversely output the input torque.

With reference to the first aspect and the foregoing implementation manner, in another implementation manner of the first aspect, the reverse rotation transmission mechanism further includes a fifth gear and a fourth gear, the fifth gear is externally engaged with the third gear, the fourth gear is externally engaged with the second gear, and the fourth gear is in transmission connection with the fifth gear, so as to be in transmission connection with the third gear and the second gear.

With reference to the first aspect and the foregoing implementation manner of the first aspect, in another implementation manner of the first aspect, the reverse rotation transmission mechanism further includes a first transmission shaft and a second transmission shaft that are arranged in parallel or at an included angle;

the first transmission shaft and the second transmission shaft are sequentially in transmission connection, the first transmission shaft is far away from one end of the second transmission shaft and is in transmission connection with the third gear, and the second transmission shaft is far away from one end of the first transmission shaft and is in transmission connection with the second gear.

With reference to the first aspect and the foregoing implementation manner, in another implementation manner of the first aspect, the reverse rotation transmission mechanism includes a sixth gear and a seventh gear, the sixth gear is in transmission connection with the second ring gear, the seventh gear is in transmission connection with the first ring gear, and the sixth gear is externally engaged with the seventh gear, so as to reversely output the input torque.

With reference to the first aspect and the foregoing implementation manner of the first aspect, in another implementation manner of the first aspect, the reverse rotation transmission mechanism further includes a fourth transmission shaft and a fifth transmission shaft that are arranged in parallel or at an included angle;

one end of the fifth transmission shaft is in transmission connection with the first gear ring, the other end of the fifth transmission shaft is in transmission connection with the seventh gear, one end of the fourth transmission shaft is in transmission connection with the second gear ring, and the other end of the fourth transmission shaft is in transmission connection with the sixth gear.

With reference to the first aspect and the foregoing implementation manner, in another implementation manner of the first aspect, the mechanical differential electric drive axle further comprises a third planetary reducer, and the third planetary reducer is coaxially arranged with the first sun gear and connected with the first planet carrier to output torque through the third planetary reducer.

With reference to the first aspect and the foregoing implementation manner of the first aspect, in another implementation manner of the first aspect, the first motor is disposed on a side of the first sun gear, which is far away from the first planet carrier, and is located between the first sun gear and the second planetary reducer.

In a second aspect, the embodiment of the utility model further provides a vehicle, which comprises the mechanical differential electric drive axle. The mechanical differential electric drive bridge comprises a first motor, a first planetary reducer, a second motor, a second planetary reducer and a reverse rotation transmission mechanism; the first motor is in transmission connection with a first sun gear of the first planetary reducer and outputs torque through a first planet carrier of the first planetary reducer; the second motor and the second planetary reducer output torque through the second planetary reducer; the reverse rotation transmission mechanism is in transmission connection with a first gear ring of the first planetary speed reducer and the second planetary speed reducer respectively, and can reversely output the torque input by the first gear ring to the second planetary speed reducer.

Compared with the prior art, the mechanical differential electric drive bridge provided by the embodiment of the utility model has the beneficial effects that:

the mechanical differential electric drive bridge comprises a first motor, a first planetary reducer, a second motor, a second planetary reducer and a reverse rotation transmission mechanism, wherein the first motor is in transmission connection with a first sun gear of the first planetary reducer, and the first motor drives wheels or a crawler belt to rotate through output torque of a first planet carrier of the first planetary reducer. The second motor and the second planetary reducer, and the second motor passes through second planetary reducer output torque to drive rotation such as wheel or track, thereby realize the purpose that drives the vehicle and travel with first motor jointly. The reverse rotation transmission mechanism is in transmission connection with a first gear ring of the first planetary reducer, and is also in transmission connection with a second planetary reducer, and the reverse rotation transmission mechanism can reversely output the torque input by the first gear ring to the second planetary reducer.

The beneficial effects of the vehicle provided by the embodiment of the utility model relative to the prior art are the same as the beneficial effects of the mechanical differential electric drive bridge relative to the prior art, and are not described again.

In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments will be briefly described below. It is appreciated that the following drawings depict only certain embodiments of the utility model and are therefore not to be considered limiting of its scope. For a person skilled in the art, it is possible to derive other relevant figures from these figures without inventive effort.

Fig. 1 is a schematic structural diagram of a mechanical differential electric drive axle provided in an embodiment of the present invention.

Fig. 2 is a schematic structural diagram of a reverse rotation transmission mechanism of the mechanical differential electrically-driven bridge provided by the embodiment of the utility model.

Fig. 3 is a schematic structural diagram of the mechanical differential electrically-driven bridge provided by the embodiment of the utility model when another reverse rotation transmission mechanism is adopted.

Fig. 4 is a schematic structural diagram of another reverse rotation transmission mechanism of the mechanical differential electrically-driven bridge provided by the embodiment of the utility model.

Icon: 20-a wheel; 10-mechanical differential electric drive bridge; 11-a first planetary reducer; 111-a first sun gear; 112-a first planet; 113-a first planet carrier; 114-a first ring gear; 13-third planetary reducer; 131-a third sun gear; 132-a third planet; 133-third carrier; 134-third gear ring; 12-a second planetary reducer; 121-a second sun gear; 122-second planet; 123-a second planet carrier; 124-a second ring gear; 14-a fourth planetary reducer; 141-a fourth sun gear; 142-a fourth planet; 143-fourth planet carrier; 144-a fourth ring gear; 15-a counter-rotating transmission mechanism; 151-first gear; 152-a second gear; 153-third gear; 154-fourth gear; 155-fifth gear; 1501-a first drive shaft; 1502-a second drive shaft; 1503-third transmission shaft; 156-sixth gear; 157-seventh gear; 158-eighth gear; 159-ninth gear; 1504-fourth drive shaft; 1505-fifth drive shaft; 1506-sixth drive shaft; 1507-seventh drive shaft; 16-a first electric machine; 17-a second motor.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. The terms "upper", "lower", "inner", "outer", "left", "right", and the like, refer to an orientation or positional relationship as shown in the drawings, or as would be conventionally found in use of the products of the present invention, or as would be conventionally understood by one of ordinary skill in the art, and are used merely to facilitate the description and simplify the description, but do not indicate or imply that the referenced devices or elements must have a particular orientation, configuration, and operation in a particular orientation, and therefore should not be construed as limiting the present invention. The terms "first," "second," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance. The terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

It is also to be understood that, unless expressly stated or limited otherwise, the terms "disposed," "connected," and the like are intended to be open-ended, and mean "connected," i.e., fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; the connection may be direct or indirect via an intermediate medium, and may be a communication between the two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

The following detailed description of embodiments of the utility model refers to the accompanying drawings.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a mechanical differential electric drive axle 10 according to an embodiment of the present invention.

The embodiment of the utility model provides a mechanical differential electrically-driven bridge 10, and the mechanical differential electrically-driven bridge 10 has the characteristics of low cost and high reliability. The mechanical differential electric drive axle 10 can be applied to various vehicles such as automobiles, trucks and the like.

When the mechanical differential electric drive axle 10 is applied to a vehicle, the vehicle drives the wheels 20 to rotate through the mechanical differential electric drive axle 10, so as to maintain the vehicle running. Because the vehicle adopts the mechanical differential electric drive axle 10 provided by the embodiment of the utility model, the vehicle also has the characteristics of lower cost and higher reliability.

The structural composition, the operation principle and the beneficial effects of the mechanical differential electric drive axle 10 provided by the embodiment of the utility model will be described in detail below.

With reference to fig. 1, the mechanical differential electric drive axle 10 includes a first electric machine 16, a first planetary reducer 11, a second electric machine 17, a second planetary reducer 12 and a reverse rotation transmission mechanism 15, wherein the first electric machine 16 is in transmission connection with a first sun gear 111 of the first planetary reducer 11, and the first electric machine 16 drives wheels 20 or tracks and the like to rotate by an output torque of a first planet carrier 113 of the first planetary reducer 11. The second motor 17 and the second planetary reducer 12, and the second motor 17 outputs torque through the second planetary reducer 12 to drive the wheels 20 or the caterpillar track and the like to rotate, so as to achieve the purpose of driving the vehicle to run together with the first motor 16. And the reverse rotation transmission mechanism 15 is in transmission connection with the first ring gear 114 of the first planetary reducer 11, the reverse rotation transmission mechanism 15 is also in transmission connection with the second planetary reducer 12, and, the reverse rotation transmission mechanism 15 is capable of reversely outputting the torque input from the first ring gear 114 to the second planetary gear reducer 12, and in this way, since the first carrier 113 is a member for outputting torque in the first planetary gear set 11, the first planetary gear 112 is in a state of being able to rotate or revolve, when the vehicle is turning, the power of the first electric machine 16 is partially or totally transmitted to the second planetary gear reducer 12 through the first sun gear 111, the first planetary gear 112, the first ring gear 114 and the reverse transmission mechanism of the first planetary gear reducer 11, so that the second planetary gear reducer 12 outputs torque, therefore, the differential mechanism is of a mechanical structure, and has the advantages of low cost and high reliability.

Further, the second electric machine 17 is in transmission connection with the second sun gear 121 of the second planetary gear reducer 12, and the second electric machine 17 is used for outputting torque through the second carrier 123 of the second planetary gear reducer 12. The reverse rotation transmission mechanism 15 is drivingly connected to the second ring gear 124 of the second planetary gear reducer 12 so as to output the torque input from the first ring gear 114 in the reverse direction to the second ring gear 124, or output the torque input from the second ring gear 124 in the reverse direction to the first ring gear 114, in other words, the second motor 17 and the second planetary gear reducer 12 are provided in a state where the second planetary gear 122 is capable of revolving and rotating about its own axis, and the reverse rotation transmission mechanism 15 is provided in the middle, substantially the same as the first motor 16 and the first planetary gear reducer 11. In this way, since the ring gears of the two planetary speed reducers are not fixed and are connected through the reverse transmission mechanism 15, the first ring gear 114 and the second ring gear 124 cannot rotate in the same direction and can only rotate in opposite directions, and when the vehicle runs straight, the first ring gear 114 and the second ring gear 124 are relatively static; when the vehicle is turning, the first ring gear 114 and the second ring gear 124 rotate in opposite directions, for example, the rotation speed of the left wheel 20 in fig. 1 is lower than that of the right wheel 20, and at this time, part or all of the power of the first electric machine 16 is transmitted to the second ring gear 124 and the second planet gear 122 of the second planetary reducer 12 through the first sun gear 111, the first planet gear 112, the first ring gear 114 and the reverse transmission mechanism of the first planetary reducer 11, so as to drive the right wheel 20 to rotate through the second planet carrier 123 of the second planetary reducer 12, thereby achieving the purpose of differential speed; when the rotation speed of the left wheel 20 is higher than that of the right wheel 20 in fig. 1, part or all of the power of the second motor 17 is transmitted to the first ring gear 114 and the first planet gear 112 of the first planetary reducer 11 through the second sun gear 121, the second planet gear 122, the second ring gear 124 and the reverse transmission mechanism of the second planetary reducer 12, so as to drive the left wheel 20 to rotate through the first carrier 113 of the first planetary reducer 11, thereby achieving the purpose of differential speed.

With continuing reference to fig. 1 and fig. 2, fig. 2 is a schematic structural diagram of a reverse transmission mechanism 15 of the mechanical differential electric-driven axle 10 according to the embodiment of the present invention.

The reverse rotation transmission mechanism 15 may include a first gear 151, a second gear 152, and a third gear 153. Wherein the first gear 151 is externally engaged with the third gear 153, and the first gear 151 is externally engaged with the first ring gear 114. The second gear 152 is externally engaged with the second ring gear 124, the third gear 153 is in transmission connection with the second gear 152, and the reverse rotation transmission mechanism 15 may further include a fifth gear 155 and a fourth gear 154, wherein the fifth gear 155 is externally engaged with the third gear 153, the fourth gear 154 is externally engaged with the second gear 152, and the fourth gear 154 is in transmission connection with the fifth gear 155, such that when the vehicle is turned, one more gear is engaged with the first ring gear 114 than with the second ring gear 124, which enables the torque to be reversely output when the torque is transmitted through the first gear 151, the third gear 153, the fifth gear 155, the fourth gear 154, and the second gear 152, or through the fourth gear 154, the second gear 152, the fifth gear 155, the third gear 153, and the first gear 151, and has a simple structure and a low cost.

The first gear 151 and the second gear 152 may be disposed above the ring gear, below the ring gear, or substantially horizontal to the ring gear, so as to improve the flexibility of the design of the reverse transmission mechanism 15. In other embodiments, the reverse rotation transmission mechanism 15 may only include the first gear 151, the second gear 152 and the third gear 153. The first gear 151 is externally engaged with the third gear 153, and the first gear 151 is externally engaged with the first ring gear 114. The second gear 152 is externally engaged with the second ring gear 124, and the third gear 153 is in transmission connection with the second gear 152, so that when torque is transmitted through the first gear 151, the third gear 153 and the second gear 152, or through the second gear 152, the third gear 153 and the first gear 151, the torque is reversely output.

In other embodiments, the number of gears engaged with the first ring gear 114 and the number of gears engaged with the second ring gear 124 may be different by an odd number, so as to reversely output the input torque, and thus the first ring gear 114 and the second ring gear 124 can only relatively reversely rotate.

Furthermore, in other embodiments, the first gear 151 may be provided in plurality, and disposed at intervals around the outer circumference of the first gear ring 114, and all engaged with the first gear ring 114, so as to make the first gear ring 114 uniformly stressed, and similarly, the second gear 152 may also be provided in plurality.

Referring to fig. 1, the reverse rotation transmission mechanism 15 may further include a first transmission shaft 1501 and a second transmission shaft 1502 arranged at an included angle, the first transmission shaft 1501 and the second transmission shaft 1502 are sequentially connected in a transmission manner, an end of the first transmission shaft 1501 far away from the second transmission shaft 1502 is connected with the third gear 153 in a transmission manner, and an end of the second transmission shaft 1502 far away from the first transmission shaft 1501 is connected with the second gear 152 in a transmission manner. Thereby, the third gear 153 and the second gear 152 are in transmission connection, and the first transmission shaft 1501 and the second transmission shaft 1502 are arranged at an included angle, so that the reverse rotation transmission mechanism 15 can be flexibly arranged, and the design of a lower floor or a higher floor of the vehicle is facilitated.

In addition, the reverse rotation transmission mechanism 15 may further include a third transmission shaft 1503 provided between the first transmission shaft 1501 and the second transmission shaft 1502 so as to drivingly connect the first transmission shaft 1501 and the third transmission shaft 1503, further improving flexibility in arranging the reverse rotation transmission mechanism 15.

It should be noted that, in other embodiments, the first transmission shaft 1501 and the second transmission shaft 1502 may be arranged in parallel or be integrated shafts.

Referring to fig. 3 and 4, fig. 3 is a schematic structural diagram of the mechanical differential electric drive axle 10 according to the embodiment of the present invention when another reverse rotation transmission mechanism 15 is adopted. Fig. 4 is a schematic structural diagram of another reverse rotation transmission mechanism 15 of the mechanical differential electric drive axle 10 according to the embodiment of the present invention.

The reverse rotation transmission mechanism 15 may include a sixth gear 156 and a seventh gear 157, the sixth gear 156 is in transmission connection with the second gear ring 124, the seventh gear 157 is in transmission connection with the first gear ring 114, and the sixth gear 156 is externally engaged with the seventh gear 157, so as to achieve the purpose of reversely outputting the input torque.

It should be noted that, in this embodiment, the reversing mechanism may further include two ninth gears 159 and two eighth gears 158, the two ninth gears 159 are sequentially engaged, one ninth gear 159 is engaged with the first gear ring 114, the other ninth gear 159 is in transmission connection with the seventh gear 157, the two eighth gears 158 are sequentially engaged, one eighth gear 158 is engaged with the second gear ring 124, and the other eighth gear 158 is in transmission connection with the sixth gear 156, so that a certain distance is provided between the rotation axes of the sixth gear 156 and the seventh gear 157 and the rotation axes of the first gear ring 114 and the second gear ring 124, which is convenient for designing the position of the reversing transmission mechanism 15.

Furthermore, the reverse rotation transmission mechanism 15 may further include a fourth transmission shaft 1504 and a fifth transmission shaft 1505 arranged in parallel or at an included angle, wherein one end of the fifth transmission shaft 1505 may be in transmission connection with one of the two ninth gears 159 far away from the first gear ring 114, the other end of the fifth transmission shaft 1505 may be in transmission connection with the seventh gear 157, one end of the fourth transmission shaft 1504 may be in transmission connection with one of the two eighth gears 158 far away from the second gear ring 124, and the other end of the fourth transmission shaft may be in transmission connection with the sixth gear 156. Of course, one end of the fifth transmission shaft 1505 may be directly drivingly connected with the first gear ring 114, and one end of the fourth transmission shaft 1504 may also be directly drivingly connected with the second gear ring 124, thereby further increasing the flexibility in arranging the position of the reverse mechanism.

Also, the reverse mechanism may further include a sixth transmission shaft 1506 and a seventh transmission shaft 1507, wherein the sixth transmission shaft 1506 is provided between the fourth transmission shaft 1504 and the sixth gear 156, and the seventh transmission shaft 1507 is provided between the fifth transmission shaft 1505 and the seventh gear 157, to further improve flexibility in arranging the positions of the reverse mechanism.

With continued reference to fig. 1 and 3, the mechanical differential electric transaxle 10 may further include a third planetary reduction gear 13, the third planetary reduction gear 13 being coaxially disposed with the first sun gear 111 and connected to the first carrier 113 to output torque through the third planetary reduction gear 13. The first planetary speed reducer 11 and the third planetary speed reducer 13 which are coaxially arranged are arranged, so that the speed change structure is simplified, and the flexibility of the mechanical differential electric drive axle 10 is improved.

In addition, in the present embodiment, the third ring gear 134 of the third planetary gear reducer 13 is fixed so as to output torque through the third sun gear 131, the third planetary gears 132, and the third carrier 133, and in another embodiment, the third carrier 133 may be fixed so as to output torque through the third ring gear 134 of the third planetary gear reducer 13.

Furthermore, the mechanically differential electrically driven bridge 10 may also comprise a fourth planetary reduction gear 14, which fourth planetary reduction gear 14 is arranged coaxially with the second sun gear 121 and is connected with the second planet carrier 123 for torque output via the fourth planetary reduction gear 14. In addition, in the present embodiment, the fourth ring gear 144 of the fourth planetary gear reducer 14 is fixed so as to output the torque through the fourth sun gear 141, the fourth planetary gear 142, and the fourth carrier 143, and in another embodiment, the fourth carrier 143 may be fixed so as to output the torque through the fourth ring gear 144 of the fourth planetary gear reducer 14.

Further, the first electric motor 16 may be disposed on a side of the first sun gear 111 remote from the first carrier 113 and between the first sun gear 111 and the second planetary gear set 12, as shown in fig. 1, so that the left-side driving structure is disposed to extend substantially along the axis of the wheel 20, which is compact.

Furthermore, the second electric machine 17 can also be arranged on the side of the second sun gear 121 remote from the second planet carrier 123 and between the first sun gear 111 and the second planetary reducer 12, in other words, the first electric machine 16 and the second electric machine 17 are arranged extending substantially along the axis of the wheel 20, so as to further improve the compactness of the mechanical differential electric drive axle 10.

The working principle of the mechanical differential electric drive bridge 10 provided by the embodiment of the utility model is as follows:

the mechanical differential electric drive bridge 10 includes a first electric machine 16, a first planetary reducer 11, a second electric machine 17, a second planetary reducer 12 and a reverse rotation transmission mechanism 15, wherein the first electric machine 16 is in transmission connection with a first sun gear 111 of the first planetary reducer 11, and the first electric machine 16 drives wheels 20 or a crawler belt and the like to rotate through an output torque of a first planet carrier 113 of the first planetary reducer 11. The second motor 17 and the second planetary reducer 12, and the second motor 17 outputs torque through the second planetary reducer 12 to drive the wheels 20 or the caterpillar track and the like to rotate, so as to achieve the purpose of driving the vehicle to run together with the first motor 16. In contrast, since the reverse rotation transmission mechanism 15 is drivingly connected to the first ring gear 114 of the first planetary gear reducer 11, the reverse rotation transmission mechanism 15 is also drivingly connected to the second planetary gear reducer 12, and the reverse rotation transmission mechanism 15 can reversely output the torque input by the first ring gear 114 to the second planetary gear reducer 12, the first planetary gear 112 is in a state in which it can rotate or revolve in a rotating manner as a member for outputting the torque in the first planetary gear reducer 11, and a part or all of the power of the first motor 16 is transmitted to the second planetary gear reducer 12 through the first sun gear 111, the first planetary gear 112, the first ring gear 114, and the reverse transmission mechanism of the first planetary gear reducer 11 during the steering of the vehicle, thereby achieving the purpose of differential speed.

In summary, the present embodiment provides a mechanical differential electric drive axle 10, which has the features of low cost and high reliability.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and it is obvious to those skilled in the art that the features in the above embodiments may be combined with each other and the present invention may be variously modified and changed without conflict. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention. The present embodiments are to be considered as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims (10)

1. A mechanical differential electric drive bridge is characterized by comprising a first motor (16), a first planetary reducer (11), a second motor (17), a second planetary reducer (12) and a reverse rotation transmission mechanism (15);

the first motor (16) is in transmission connection with a first sun gear (111) of the first planetary reducer (11) and outputs torque through a first planet carrier (113) of the first planetary reducer (11); the second motor (17) and the second planetary reducer (12) and outputs torque through the second planetary reducer (12);

the reverse rotation transmission mechanism (15) is in transmission connection with the first gear ring (114) of the first planetary reducer (11) and the second planetary reducer (12), and the reverse rotation transmission mechanism (15) can reversely output the torque input by the first gear ring (114) to the second planetary reducer (12).

2. A mechanical differential electric drive axle according to claim 1, characterized in that the second electric machine (17) is in driving connection with a second sun gear (121) of the second planetary reduction gear (12), the second planet carrier (123) of the second planetary reduction gear (12) being adapted to outputting a torque;

the reverse rotation transmission mechanism (15) is in transmission connection with a second ring gear (124) of the second planetary speed reducer (12) so as to reversely output the torque input by the first ring gear (114) to the second ring gear (124) or reversely output the torque input by the second ring gear (124) to the first ring gear (114).

3. A mechanical differential electric drive axle according to claim 2, characterized in that the counter-rotating transmission mechanism (15) comprises a first gear wheel (151), a second gear wheel (152) and a third gear wheel (153);

the first gear (151) is in external engagement with the third gear (153) and with the first ring gear (114); the second gear (152) is in external engagement with the second ring gear (124); the third gear (153) is in transmission connection with the second gear (152) to reversely output the input torque.

4. A mechanical differential electric drive axle according to claim 3, characterized in that the counter-rotating transmission mechanism (15) further comprises a fifth gear (155) and a fourth gear (154), the fifth gear (155) being in external engagement with the third gear (153), the fourth gear (154) being in external engagement with the second gear (152), and the fourth gear (154) being in driving connection with the fifth gear (155) so as to drive connect the third gear (153) and the second gear (152).

5. A mechanical differential electric drive axle according to claim 3 wherein the counter-rotating transmission mechanism (15) further comprises a first (1501) and a second (1502) transmission shaft arranged in parallel or at an angle;

the first transmission shaft (1501) and the second transmission shaft (1502) are sequentially in transmission connection, one end, far away from the second transmission shaft (1502), of the first transmission shaft (1501) is in transmission connection with the third gear (153), and one end, far away from the first transmission shaft (1501), of the second transmission shaft (1502) is in transmission connection with the second gear (152).

6. A mechanical differential electric drive axle according to claim 2, characterized in that the counter-rotating transmission mechanism (15) comprises a sixth gear (156) and a seventh gear (157), the sixth gear (156) is in driving connection with the second ring gear (124), the seventh gear (157) is in driving connection with the first ring gear (114), and the sixth gear (156) is in external engagement with the seventh gear (157), so as to output the input torque in reverse.

7. A mechanical differential electric drive axle according to claim 6 wherein the counter-rotating transmission mechanism (15) further comprises a fourth (1504) and a fifth (1505) transmission shaft arranged in parallel or at an angle;

one end of the fifth transmission shaft (1505) is in transmission connection with the first gear ring (114), the other end of the fifth transmission shaft is in transmission connection with the seventh gear (157), one end of the fourth transmission shaft (1504) is in transmission connection with the second gear ring (124), and the other end of the fourth transmission shaft is in transmission connection with the sixth gear (156).

8. A mechanical differential electric drive axle according to any of claims 1-7, characterized in that it further comprises a third planetary reduction gear (13), said third planetary reduction gear (13) being arranged coaxially with the first sun gear (111) and being connected to the first planet carrier (113) for torque output through the third planetary reduction gear (13).

9. A mechanical differential electric drive axle according to any one of claims 1-7, characterized in that the first electric machine (16) is arranged on the side of the first sun gear (111) remote from the first planet carrier (113) and between the first sun gear (111) and the second planetary reduction gear (12).

10. A vehicle comprising a mechanical differential electric drive axle according to any one of claims 1-9.

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