Drive axle structure and vehicle with same

Abstract

The utility model provides a drive axle structure and a vehicle with the drive axle structure, the drive axle structure comprises a drive axle shell and a drive structure arranged in the drive axle shell, the drive structure is respectively used for being connected with a left drive wheel and a right drive wheel of the vehicle, and the drive structure comprises a first planet row, a second planet row, a gear shifting assembly and a drive motor; a first gear ring shaft of the first planet row is connected with a second planet carrier shaft of the second planet row, and a first planet carrier shaft of the first planet row is connected with a second sun wheel shaft of the second planet row; the second planet row is connected with the differential mechanism through the gear shifting assembly so that two-gear connection can be formed between the second planet row and the differential mechanism. The output end of the driving motor is connected with the first planet row so as to be used for inputting power to the first planet row and outputting power to the differential mechanism through different gears through the second planet row so as to drive the left driving wheel and the right driving wheel to move. The drive axle structure solves the problem that a drive axle structure in the prior art is difficult to meet the requirement for large output torque of the wheel end of a heavy vehicle.

Description

TECHNICAL FIELD

[0001] The utility model relates to drive axle technical field, specifically, drive axle structure and have its vehicle. BACKGROUND

[0002] At present, with the innovation and popularization of new energy technology, as a key component connecting the motor and the wheel, the structural design of the drive axle is facing unprecedented challenges. Especially in the field of heavy vehicles, the market requires the integration, large speed ratio and volume power density of the electric drive axle more and more strictly to adapt to the dual demand of high torque and high efficiency of heavy vehicles under complex working conditions. The prior art provides a three-gear electric drive axle structure which can meet the power transmission requirements of the vehicle to a certain extent.

[0003] However, the application of the electric drive axle system in the commercial vehicle field is increasingly widespread, and the market demand for the integration, large speed ratio and high volume power density of the electric drive axle is continuously increasing. The one-gear speed ratio design of such prior art is small, resulting in that the wheel end cannot obtain sufficient large output torque in heavy vehicle applications. In order to meet the power demand of the wheel end, it is necessary to increase the cost to select high-performance motors with high cost. This not only increases the overall cost of the system, but also brings challenges to the selection and integration of the motor. In addition, the limitations of the power flow path and the shift strategy limit the economy and efficiency of the system under different working conditions, making it difficult to achieve the best balance between power and economy. SUMMARY

[0004] The main purpose of the utility model is to provide a drive axle structure and a vehicle with the same, so as to solve the problem that the drive axle structure in the prior art cannot meet the large output torque demand of the wheel end of the heavy vehicle.

[0005] In order to achieve the above-mentioned purpose, according to one aspect of the utility model, a drive axle structure is provided, which comprises a drive axle housing and a drive structure arranged in the drive axle housing, the drive structure is respectively connected with the left drive wheel and the right drive wheel of the vehicle, and the drive structure comprises: a first planetary gear set and a second planetary gear set, a first ring gear shaft of the first planetary gear set is connected with a second planetary carrier shaft of the second planetary gear set, and a first planetary carrier shaft of the first planetary gear set is connected with a second sun gear shaft of the second planetary gear set; a shift assembly, the second planetary gear set is connected with a differential through the shift assembly, so as to form two gear connections between the second planetary gear set and the differential; a drive motor, the output end of the drive motor is connected with the first planetary gear set, so as to input power to the first planetary gear set, and output power to the differential through the second planetary gear set through two different gears, so as to drive the left drive wheel and the right drive wheel to move.

[0006] Further, the driving structure further comprises a switching assembly, which comprises a switching piece A and a switching piece B, the switching piece A is a second planet carrier shaft of the second planetary gear set, and the switching piece B is a second sun gear shaft of the second planetary gear set.

[0007] Further, the gear shifting assembly comprises a motor component, a gear shifting sleeve connected with an output end of the motor component, and a connecting portion a, a connecting portion b and a connecting portion c are arranged on the gear shifting sleeve respectively, so that the motor component drives the gear shifting sleeve to drive the connecting portion a or the connecting portion b to be connected with a corresponding one of the switching piece A and the switching piece B.

[0008] Further, the connecting portion c is connected with a housing of the differential, so that the second planetary gear set transmits power on it to the differential through different gears.

[0009] Further, a spline tooth is arranged on an inner surface of the gear shifting sleeve at the connecting portion a and the connecting portion b respectively, so as to be engaged with an outer spline on the switching piece A and the switching piece B respectively.

[0010] Further, the driving structure further comprises two wheel side reducers, the differential is connected with the two wheel side reducers through two half shafts respectively, and the two wheel side reducers are connected with a left drive wheel and a right drive wheel respectively, so that the power output by the differential is transmitted to the left drive wheel and the right drive wheel respectively through the two wheel side reducers.

[0011] Further, the driving structure further comprises a third planetary gear set arranged in the drive axle housing, a third ring gear shaft of the third planetary gear set is connected with the drive axle housing, a third sun gear shaft of the third planetary gear set is connected with the connecting portion c, and a third planet carrier shaft of the third planetary gear set is connected with the differential.

[0012] Further, the first planetary gear set comprises a first ring gear connected with a first ring gear shaft, a first planet gear engaged with the first ring gear, a first planet carrier on which the first planet gear is arranged, a first planet carrier shaft arranged in the first planet carrier, and a first sun gear engaged with the first planet gear, on which a first sun gear shaft is arranged, and the first sun gear shaft is connected with an output end of the driving motor.

[0013] Further, the second planetary gear set comprises a second ring gear connected with a second ring gear shaft, the second ring gear shaft being connected with the drive axle housing, a second planet gear engaged with the second ring gear, a second planet carrier on which the second planet gear is arranged, a second planet carrier shaft arranged in the second planet carrier, the second planet carrier shaft being used for connecting with the gear shifting assembly, and a second sun gear engaged with the second planet gear, on which a second sun gear shaft is arranged, and the second sun gear shaft is used for connecting with the gear shifting assembly.

[0014] According to another aspect of the utility model, provide a kind of vehicle, comprising the drive axle structure mentioned above.

[0015] The utility model discloses a kind of drive axle structure, including drive axle housing and the drive structure being set in it, drive structure is respectively used to be connected with the left drive wheel and right drive wheel of vehicle, drive structure includes first planetary row, second planetary row, shift assembly and drive motor;The first ring gear shaft of first planetary row is connected with the second planet carrier shaft of second planetary row, the first planet carrier shaft of first planetary row is connected with the second sun gear shaft of second planetary row;Second planetary row is connected with differential through shift assembly, to form two gear positions between second planetary row and differential;The output end of drive motor is connected with first planetary row, to be used to input power to first planetary row, and power is exported to differential through different gear position by second planetary row, to drive left drive wheel and right drive wheel movement.

[0016] In this way, by the combined use of first planetary row and second planetary row, wider torque output range and greater torque gain can be provided under different gears, so that the speed ratio of first gear is large, the ratio of interstage speed ratio is small, and the shift process is smooth, reducing the overall cost of drive structure. By receiving the direct power input of drive motor through first planetary row, and switching gear position through shift assembly by second planetary row, torque amplification or direct transmission is realized to adapt to different driving speed and load requirements, especially in the starting and low-speed driving conditions requiring high torque output, a more flexible power output mode is provided, thereby meeting the demand for large torque of heavy vehicles under complex working conditions, and further solving the problem that the drive axle structure in the prior art cannot meet the demand for large output torque of heavy vehicle wheel end. Wherein, the power flow path between second planetary row and differential is adjusted by shift assembly, so that drive motor can work efficiently under different working conditions, reduce energy loss, improve the economy and efficiency of the entire drive structure. BRIEF DESCRIPTION OF DRAWINGS

[0017] The drawings accompanying the specification of this application form a part thereof, serve to provide further understanding of the present application, and together with the description of the exemplary embodiments of the present application, serve to explain the present application, and do not constitute improper limitations on the present application. In the drawings:

[0018] Figure 1 An overall structure schematic view is shown according to the embodiment one of the drive axle structure of the utility model provides;

[0019] Figure 2 An overall structure schematic view is shown according to the embodiment two of the drive axle structure of the utility model provides;

[0020] Figure 3An embodiment three of the drive axle structure is shown in the overall structure schematic view.

[0021] The above-mentioned drawings include the following reference signs:

[0022] 10, drive axle housing; 11, left drive wheel; 12, right drive wheel; 13, drive motor;

[0023] 20, first planetary gear train; 21, first ring gear; 22, first planetary gear; 23, first carrier; 24, first sun gear;

[0024] 30, second planetary gear train; 31, second ring gear; 32, second planetary gear; 33, second carrier; 34, second sun gear;

[0025] 40, gear shifting assembly; 41, motor component; 42, gear shifting sleeve;

[0026] 50, differential;

[0027] 60, wheel-side reducer;

[0028] 70, third planetary gear train. DETAILED DESCRIPTION

[0029] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the drawings and in combination with embodiments.

[0030] In order to solve the problem that the drive axle structure in the prior art is difficult to meet the large output torque requirement of the wheel end of a heavy vehicle, the present application provides a drive axle structure and a vehicle having the same.

[0031] Please refer to Figure 1 An aspect of the technical scheme of the present application provides a drive axle structure, which comprises a drive axle housing 10 and a drive structure arranged in the drive axle housing 10, the drive structure is respectively connected with a left drive wheel 11 and a right drive wheel 12 of a vehicle, and the drive structure comprises a first planetary gear train 20, a second planetary gear train 30, a gear shifting assembly 40 and a drive motor 13; a first ring gear shaft of the first planetary gear train 20 is connected with a second carrier shaft of the second planetary gear train 30, and a first carrier shaft of the first planetary gear train 20 is connected with a second sun gear shaft of the second planetary gear train 30; the second planetary gear train 30 is connected with a differential 50 through the gear shifting assembly 40, so that two gear shifting positions are formed between the second planetary gear train 30 and the differential 50; an output end of the drive motor 13 is connected with the first planetary gear train 20, so as to input power to the first planetary gear train 20, and the power is output to the differential 50 through the second planetary gear train 30 through different gear shifting positions, so as to drive the left drive wheel 11 and the right drive wheel 12 to move.

[0032] The technical scheme of the utility model provides one aspect, through the combination use of the first planetary row 20 and the second planetary row 30, can provide wider torque output range and greater torque gain under different gears, so that the first gear speed ratio is large, the interstage speed ratio ratio is small, and the gear shifting process is smooth, and the overall cost of the driving structure is reduced. And through the first planetary row 20 receives the direct power input of the driving motor 13, the second planetary row 30 switches the gear through the gear shifting assembly 40, realizes torque amplification or direct transmission, to adapt to different driving speed and load demand, especially in the starting and low-speed driving condition requiring high torque output, a more flexible power output mode is provided, thereby meeting the demand of heavy vehicles for large torque under complex working conditions, and thereby solving the problem that the driving axle structure in the prior art cannot meet the demand of heavy vehicles for large output torque at the wheel end. Among them, the power flow path between the second planetary row 30 and the differential 50 is adjusted through the gear shifting assembly 40, so that the driving motor 13 can work efficiently under different working conditions, reduce energy loss, and improve the economy and efficiency of the whole driving structure.

[0033] As shown in Figure 1 The driving structure further includes a switching assembly, which includes switching piece A and switching piece B. Switching piece A is the second carrier shaft of the second planetary row 30, and switching piece B is the second sun gear shaft of the second planetary row 30. In this way, the switching assembly allows different connection states to be formed between the second planetary row 30 and the gear shifting assembly 40, thereby changing the power flow path and torque distribution, realizing the switching of the two gears, and enabling the driving axle structure to automatically or manually select the appropriate gear according to different driving needs of the vehicle, effectively improving the adaptability of the vehicle under complex road conditions. Through the cooperation of switching piece A and switching piece B with the gear shifting assembly 40, the power transmission link can be optimized, and unnecessary power loss can be reduced. When low-speed high-torque demand is required, switching piece B can be connected with the gear shifting assembly 40 to realize torque amplification; when high-speed low-torque demand is required, switching piece A is connected with the gear shifting assembly 40 to form a direct transmission mode, improving the power transmission efficiency.

[0034] Specifically, the gear shifting assembly 40 includes a motor component 41 and a gear shifting sleeve 42. The gear shifting sleeve 42 is connected with the output end of the motor component 41, and the gear shifting sleeve 42 is respectively provided with a connection part a, a connection part b and a connection part c, so that the motor component 41 drives the gear shifting sleeve 42 to drive the connection part a or the connection part b to be connected with one of the switching piece A and the switching piece B corresponding thereto. In this way, the accurate driving capacity of the motor component 41 ensures that the gear shifting sleeve 42 can be accurately connected with the switching piece A or the switching piece B, realizing the quick switching from one gear to another, improving the reliability and accuracy of gear shifting. Moreover, it can ensure the smooth conversion of power flow, avoiding the impact and vibration that may occur during traditional manual gear shifting, thereby improving the speed of gear shifting, so that the vehicle can adapt to different driving conditions more quickly.

[0035] Specifically, the connecting part c is connected with the housing of the differential 50, so that the second planetary gear set 30 transmits power thereon to the differential 50 through different gears. In this way, under the fixed connection between the connecting part c and the differential 50, the second planetary gear set 30 can be switched between two gears to realize the optimal distribution of power. In the low-speed and high-torque working condition, the shift assembly 40 can transmit more power to the differential 50 through the second planetary gear set 30 to meet the demand for large torque during starting and climbing. When driving at high speed, the gear can be switched to a higher gear to reduce the loss in the power transmission process and improve the driving efficiency.

[0036] According to the architecture design of the present application, the functions of different gears are as follows:

[0037] In the first gear, the second planet carrier shaft serves as the power output of the reducer, the connecting part a is coupled with the second planet carrier shaft, the connecting part b is disconnected, and the connecting part c is connected with the differential 50 as the power output of the entire transmission unit.

[0038] In the second gear, the second sun gear shaft serves as the power output of the reducer, the connecting part b is coupled with the second sun gear shaft, the connecting part a is disconnected, and the connecting part c is connected with the differential 50 as the power output of the entire transmission unit.

[0039] Specifically, the shift sleeve 42 is provided with spline teeth on the inner surfaces of the connecting part a and the connecting part b, respectively, for corresponding engagement with the outer splines on the switching piece A and the switching piece B, respectively. In this way, the spline connection has high precision and good coaxiality, so that accurate engagement between the shift sleeve 42 and the switching piece A or the switching piece B can be ensured when the shift sleeve 42 is switched between the connecting part a and the connecting part b, avoiding sliding or vibration in the power transmission process, ensuring the smoothness and reliability of gear shifting, and reducing energy loss in the power transmission process, thereby improving the power transmission efficiency of the entire drive axle structure under different gears. In the present embodiment, the drive structure further comprises two wheel-side reducers 60, and the differential 50 is connected with the two wheel-side reducers 60 through two half shafts, respectively, and the two wheel-side reducers 60 are connected with the left drive wheel 11 and the right drive wheel 12, respectively, so that the power output by the differential 50 is transmitted to the left drive wheel 11 and the right drive wheel 12, respectively, through the two wheel-side reducers 60.

[0040] In the embodiment, the driving structure further comprises two wheel-side reducers 60, the differential 50 is connected to the two wheel-side reducers 60 through two half shafts respectively, and the two wheel-side reducers 60 are connected to the left driving wheel 11 and the right driving wheel 12 respectively, so that the power output by the differential 50 is transmitted to the left driving wheel 11 and the right driving wheel 12 respectively through the two wheel-side reducers 60. In this way, the power is decelerated again after the differential 50 outputs the power, so as to further amplify the torque. This is especially important in heavy vehicles or working conditions that require high torque output, such as traction, climbing or continuous heavy load transportation. Since the wheel-side reducer 60 can provide additional torque amplification, the torque requirement of the driving motor 13 can be reduced to a certain extent, so it is possible to select a smaller size and lower cost main drive assembly, which helps to reduce the overall manufacturing cost and weight of the vehicle. Moreover, the wheel-side reducer 60 can more accurately control the power output of each driving wheel, which helps to improve the driving stability and maneuverability of the vehicle in complex road conditions.

[0041] In the second embodiment of the present application, as shown in Figure 2 The driving structure further comprises a third planetary gear set 70, the third planetary gear set 70 is arranged in the drive axle housing 10, the third ring gear shaft of the third planetary gear set 70 is connected with the drive axle housing 10, the third sun gear shaft of the third planetary gear set 70 is connected with the connecting part c, and the third carrier shaft of the third planetary gear set 70 is connected with the differential 50. The above arrangement cancels the two wheel-side reducers 60 in the first embodiment, and by adding a planetary gear set, the connecting part c is connected with the third sun gear shaft of the third planetary gear set 70, so that the third carrier shaft of the third planetary gear set 70 serves as a new power output of the gearbox.

[0042] In the third embodiment of the present application, as shown in Figure 3 The driving structure has two, the two driving structures are connected with the differential 50 respectively, and the wheel-side reducer 60 is arranged between the left driving wheel 11 and the right driving wheel 12 and the differential 50, and then the left driving wheel 11 and the right driving wheel 12 are driven respectively, so that the power output at the wheel end is stronger, which can meet the application of commercial vehicle drive axle.

[0043] In the present embodiment, the first planetary gear set 20 includes a first ring gear 21, a first planet gear 22, a first planet carrier 23, and a first sun gear 24; the first ring gear 21 is connected with a first ring gear shaft; the first planet gear 22 is meshingly connected with the first ring gear 21; the first planet gear 22 is arranged on the first planet carrier 23, and a first planet carrier shaft is arranged through the first planet carrier 23; the first sun gear 24 is meshingly connected with the first planet gear 22, and a first sun gear shaft is arranged through the first sun gear 24, and the first sun gear shaft is connected with the output end of the driving motor 13. In this way, the first planetary gear set 20 can realize torque amplification through its gear ratio characteristics, and at the same time, the high-speed low-torque output of the driving motor 13 can be converted into low-speed high-torque suitable for vehicle driving, thereby enhancing the starting and climbing ability of the vehicle. Moreover, the design of the first planetary gear set 20 allows the driving motor 13 to work in an efficient speed range, and at the same time, the output power is adjusted through the gear ratio, thereby improving the overall efficiency of the driving system, which is particularly important for heavy commercial vehicles, and can prolong the cruising range and reduce energy consumption. Compared with the traditional fixed gear transmission, the design of the first planetary gear set 20 can reduce the use of other transmission components in the driving system, thereby simplifying the system structure, reducing the weight and cost, and improving the compactness and reliability of the driving system.

[0044] In the present embodiment, the second planetary gear set 30 includes a second ring gear 31, a second planet gear shaft, a second planet carrier 33, and a second sun gear 34; the second ring gear 31 is connected with a second ring gear shaft, and the second ring gear shaft is connected with the drive axle housing 10; the second planet gear shaft is meshingly connected with the second ring gear 31; the second planet carrier 33, and the second planet gear shaft is arranged on the second planet carrier 33, and a second planet carrier shaft is arranged through the second planet carrier 33, and the second planet carrier shaft is used for being connected with the shift assembly 40; the second sun gear 34 is meshingly connected with the second planet gear shaft, and a second sun gear shaft is arranged through the second sun gear 34, and the second sun gear shaft is used for being connected with the shift assembly 40. In this way, the second planetary gear set 30 can realize two gear output through cooperation with the shift assembly 40, so that the vehicle can select the most suitable gear according to different driving conditions (such as speed, load or driving mode), so as to obtain the best power output and energy efficiency. Moreover, the planetary gear set of the second planetary gear set 30 can realize torque amplification and speed conversion, which makes it possible to adjust the torque and speed output to the differential 50 through the second planetary gear set 30 even if the driving motor 13 has a constant speed, thereby enhancing the adaptability and driving flexibility of the vehicle. The use of the second planetary gear set 30 in combination with the shift assembly 40 helps to improve the integration of the entire drive axle structure, so that the driving system is more compact, which is conducive to the design and space layout of the vehicle, and at the same time, the complexity and cost of the system are reduced.

[0045] The utility model discloses technical scheme's another aspect provides a kind of vehicle, including the drive axle structure mentioned above. Thus, by the efficient power transmission characteristics of first planetary row 20, second planetary row 30 and shift assembly 40 in drive axle structure, vehicle can switch gear according to driving demand, realize the accurate distribution of power, to improve acceleration performance and climbing ability, especially in heavy vehicle and high performance vehicle, can significantly enhance the power performance of vehicle. And, the power regulation function of two gears, can make driving motor 13 maintain high efficiency operation in wider working range, to reduce energy consumption, for heavy commercial vehicle, can effectively prolong the cruising range, improve energy utilization efficiency.

[0046] From the above description, it can be seen that the embodiments of the utility model realize the following technical effects:

[0047] Drive axle structure includes drive axle housing 10 and the drive structure being arranged in it, and drive structure is used to connect with the left drive wheel 11 and right drive wheel 12 of vehicle respectively, and drive structure includes first planetary row 20, second planetary row 30, shift assembly 40 and driving motor 13;The first ring gear shaft of first planetary row 20 is connected with the second planetary carrier shaft of second planetary row 30, and the first planetary carrier shaft of first planetary row 20 is connected with the second sun gear shaft of second planetary row 30;Second planetary row 30 is connected with differential 50 through shift assembly 40, to form two gear connections between second planetary row 30 and differential 50;The output end of driving motor 13 is connected with first planetary row 20, to be used to input power to first planetary row 20, and power is output to differential 50 through different gears through second planetary row 30, to drive left drive wheel 11 and right drive wheel 12 movement. Thus, by the combined use of first planetary row 20 and second planetary row 30, it can provide wider torque output range and greater torque gain under different gears, so that the ratio of one gear is large, the ratio of interstage speed ratio is small, and the shift process is smooth, reduces the overall cost of drive structure. And by the direct power input of driving motor 13 received by first planetary row 20, second planetary row 30 switches gear through shift assembly 40, realizes torque amplification or direct transmission, to adapt to different speed and load requirements, especially in the starting and low-speed running conditions requiring high torque output, provide more flexible power output mode, to meet the demand of heavy vehicle in complex working conditions to large torque, to solve the problem that the drive axle structure in the prior art cannot meet the demand of heavy vehicle wheel end to large output torque. Wherein, by the power flow path between second planetary row 30 and differential 50 adjusted by shift assembly 40, driving motor 13 can work efficiently under different working conditions, reduce energy loss, improve the economy and efficiency of the whole drive structure.

[0048] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, steps, operations, devices, components and / or combinations thereof, but do not preclude the presence or addition of one or more other features, steps, operations, devices, components and / or combinations thereof.

[0049] The relative arrangement of parts and steps, numerical expressions, and numerical values set forth in the examples are not intended to limit the scope of the present application unless otherwise specifically stated. It is to be understood that the drawings are not necessarily to scale of the various parts shown in the drawings. Techniques, methods, and apparatus known to those of ordinary skill are not discussed in detail because they would be understood that such techniques, methods, and apparatus are considered part of the art. In all examples shown and discussed herein, any specific values are to be interpreted as merely illustrative and not limiting. Thus, other examples of example embodiments can have different values. It is noted that like numbers and letters on the figures identify like parts throughout the several views, and thus, once an item is defined in one figure, it is not necessary to discuss it further in connection with other figures where it is understood that the item will be similarly constructed and function in the same manner.

[0050] In the description of the present application, it is to be understood that the orientation words such as "front, back, up, down, left, right", "horizontal, vertical, perpendicular, horizontal" and "top, bottom" and the like indicated orientation or position relationship is usually based on the orientation or position relationship shown in the drawings, only for the convenience of describing the present application and simplifying the description, without making the opposite statement, these orientation words do not indicate and imply that the device or element referred to must have a particular orientation or be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the scope of protection of the present application; the orientation words "inner, outer" refer to the inner and outer relative to the contour of each component.

[0051] For purposes of the description hereinafter, spatial relative terms, such as "above", "below", "upper", "lower", and the like, can be used to describe the relative position of one element or feature to another as illustrated in the figures. It will be understood that the spatial relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientations depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "up" other elements or features would then be oriented "below" or "down" the other elements or features. Thus, the exemplary term "above" can encompass both an orientation of above and below. The device can be otherwise oriented (rotated 90 degrees or at other orientations) and the spatial relative descriptors used herein interpreted accordingly.

[0052] In addition, it should be noted that the use of "first", "second", and the like words of distinction do not connote any meaning of importance, but are used solely to differentiate one element from another, and are used in the context of this patent application only. The use of such terms in the context of the specification does not in any way limit the scope of the present application.

[0053] The preferred embodiments of the present application have been described above with the purpose of enabling not only the best modes of practicing the application known to the inventors at this time, but also of enabling others skilled in the art to utilize the application in various embodiments and with various modifications as are suited to the particular use contemplated. Therefore, the above description is intended to be illustrative, but not restrictive, of the scope of the present application. All patents and patent applications mentioned herein are incorporated by reference in their entirety.

Claims

1. A drive axle structure, comprising a drive axle housing (10) and drive structures disposed therein, the drive structures being respectively used for connecting to a left drive wheel (11) and a right drive wheel (12) of a vehicle, characterized in that, The driving structure includes: The first planetary gear set (20) and the second planetary gear set (30) are connected, wherein the first gear ring shaft of the first planetary gear set (20) is connected to the second planet carrier shaft of the second planetary gear set (30), and the first planet carrier shaft of the first planetary gear set (20) is connected to the second sun gear shaft of the second planetary gear set (30). The shift assembly (40) is used to connect the second planetary gear set (30) to the differential (50) so that two gears are connected between the second planetary gear set (30) and the differential (50). A drive motor (13) is connected to the first planetary gear set (20) at its output end to input power to the first planetary gear set (20) and output power to the differential (50) through the second planetary gear set (30) via two different gears to drive the left drive wheel (11) and the right drive wheel (12) to move.

2. The drive axle structure according to claim 1, characterized in that, The driving structure also includes: The switching assembly includes a switching component A and a switching component B, wherein the switching component A is the second planet carrier shaft of the second planetary gear (30) and the switching component B is the second sun gear shaft of the second planetary gear (30).

3. The drive axle structure according to claim 2, characterized in that, The shift assembly (40) includes: Motor components (41); The shift sleeve (42) is connected to the output end of the motor component (41). The shift sleeve (42) is provided with a connecting part a, a connecting part b and a connecting part c, so that the motor component (41) drives the shift sleeve (42) to drive the connecting part a or the connecting part b to connect with one of the switching components A and B.

4. The drive axle structure according to claim 3, characterized in that, The connecting part c is connected to the housing of the differential (50) so that the second planetary gear set (30) transmits its power to the differential (50) through different gears.

5. The drive axle structure according to claim 3, characterized in that, The shift sleeve (42) has spline teeth on its inner surface at the connecting part a and the connecting part b, respectively, for meshing with the external splines on the switching member A and the switching member B.

6. The drive axle structure according to claim 1, characterized in that, The driving structure also includes: Two wheel-side reducers (60) are provided. The differential (50) is connected to the two wheel-side reducers (60) respectively via two half-shafts. The two wheel-side reducers (60) are connected to the left drive wheel (11) and the right drive wheel (12) respectively, so that the power output by the differential (50) is transmitted to the left drive wheel (11) and the right drive wheel (12) respectively after passing through the two wheel-side reducers (60).

7. The drive axle structure according to claim 3, characterized in that, The driving structure also includes: The third planetary gear set (70) is disposed inside the drive axle housing (10). The third ring gear shaft of the third planetary gear set (70) is connected to the drive axle housing (10). The third sun gear shaft of the third planetary gear set (70) is connected to the connecting part c. The third planet carrier shaft of the third planetary gear set (70) is connected to the differential (50).

8. The drive axle structure according to claim 1, characterized in that, The first planetary array (20) includes: First gear ring (21), the first gear ring (21) is connected to the first gear ring shaft; The first planetary gear (22) meshes with the first gear ring (21); The first planet carrier (23) has the first planet gear (22) mounted on it, and the first planet carrier shaft passes through it. The first sun gear (24) is meshed with the first planetary gear (22). The first sun gear (24) is provided with a first sun gear shaft, which is connected to the output end of the drive motor (13).

9. The drive axle structure according to claim 1, characterized in that, The second planetary arrangement (30) includes: The second gear ring (31) is connected to the second gear ring shaft, which is connected to the drive axle housing (10). The second planetary gear (32) meshes with the second gear ring (31); The second planetary carrier (33) has the second planetary gear (32) mounted on it, and the second planetary carrier shaft passes through it. The second planetary carrier shaft is used to connect with the shift assembly (40). The second sun gear (34) meshes with the second planetary gear (32), and the second sun gear shaft passes through the second sun gear (34). The second sun gear shaft is used to connect with the shift assembly (40).

10. A vehicle, comprising a drive axle structure, characterized in that, The drive axle structure is the drive axle structure according to any one of claims 1 to 9.

Images