Electric driving structure of axle and axle

Abstract

The invention discloses an electric driving structure of an axle and the axle. The electric driving structure of the axle comprises an axle housing, a motor, a half shaft, a gear reducer and a planetary reducer. The body part of the motor is fixed on the axle housing; the gear reducer comprises a first gear driven by a motor and a second gear linked with the first gear, and the second gear is synchronously connected with a rotating shaft; the planetary reducer comprises a sun gear, a planetary support, a planetary gear and a gear ring, the sun gear sleeves the rotating shaft, and the planetary support is pivoted to the axle housing; the half shaft penetrates through the rotating shaft and is in pivot fit with the rotating shaft; the half shaft is synchronously connected with the planetary bracket; and a connecting assembly is arranged between the rotating shaft and the sun gear and can move between a first position for synchronously connecting the rotating shaft and the sun gear and a second position for mutually disconnecting the rotating shaft and the sun gear. According to the invention, the motor can be protected, the structure of the axle is simplified, the overall size of the axle is reduced, and the arrangement of the high-power motor on the axle is facilitated.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicles, and in particular to an electric drive structure of an axle and the axle. Background Art

[0002] With the continuous development of new energy technology, current commercial vehicles are gradually beginning to apply electric drive technology to replace traditional fuel drive technology. Existing electric drive axles generally have motors configured on the bridge housing, and the motors drive the half-axles of the drive axle to rotate and transmit power to the wheel ends. Generally, a reduction mechanism needs to be configured between the motor and the half-axle. The reduction mechanism is usually a multi-stage cylindrical gear transmission that occupies a large space, and the space on the conductive drive axle that can be configured with the motor is relatively small. At the same time, in order to obtain a larger acceleration ratio, a wheel-end reduction mechanism needs to be configured between the outer end of the half-axle and the wheel-end structure, resulting in a complex wheel-end structure of the electric drive axle. Summary of the invention

[0003] In view of the deficiencies in the prior art, the first object of the present invention is to provide an electric drive structure for an axle, which has a simple structure, occupies a small space, and can achieve a large reduction ratio.

[0004] A second object of the present invention is to provide a vehicle axle.

[0005] To achieve the above-mentioned purpose 1, the present invention adopts the following technical solution: The electric drive structure of the vehicle axle is characterized by comprising an axle housing, a motor, a half shaft, a gear reducer, and a planetary reducer; The body of the motor is fixed on the bridge housing; the gear reducer includes a first gear driven by the motor, a second gear linked with the first gear, and a rotating shaft pivotally connected to the bridge housing is synchronously connected to the second gear; The planetary reducer includes a sun gear, a planetary carrier, a planetary gear, and a ring gear. The sun gear is sleeved on the rotating shaft and pivotally matched with the rotating shaft. The ring gear is fixedly connected to the bridge housing. The planetary carrier is pivotally connected to the bridge housing. The planetary gear is installed on the planetary carrier and meshed between the sun gear and the ring gear. The half shaft is inserted into the rotating shaft and is pivotally matched with the rotating shaft, and the half shaft is synchronously connected with the planetary bracket; A connecting assembly is arranged between the rotating shaft and the sun gear, and the connecting assembly can move between a first position for synchronously connecting the rotating shaft and the sun gear and a second position for disconnecting the rotating shaft and the sun gear from each other.

[0006] The connecting assembly includes a first connecting gear synchronously connected to the rotating shaft, a second connecting gear synchronously connected to the sun gear, a linkage ring sleeved on the outside of the first connecting gear and the second connecting gear, and a shifting member used to drive the linkage ring to move axially along the first connecting gear and the second connecting gear; the inner edge of the linkage ring is provided with a convex tooth that can mesh with the first connecting gear and the second connecting gear.

[0007] The outer end of the sun gear protrudes from the outer end of the planetary bracket to form a connecting portion, and the second connecting gear is sleeved on the connecting portion and synchronously connected with the connecting portion.

[0008] The half shaft includes a first end and a second end opposite to the first end. The first end passes through the inner end of the rotating shaft and is synchronously connected to the planetary bracket. The other end of the half shaft passes through the outer end of the rotating shaft and extends to the outer end of the axle.

[0009] The planet support comprises an inner end wall and an outer end wall arranged opposite to the inner end wall.

[0010] The inner end wall and the outer end wall are fixedly connected together in a detachable manner, and a gear shaft is arranged on the planetary gear, the two ends of the gear shaft are respectively connected to the inner end wall and the outer end wall, and the two ends of the gear are respectively pivotally matched with the inner end wall and the outer end wall.

[0011] The planetary reducer also includes a plurality of bolts and a plurality of spacers corresponding to the bolts one by one; the bolts cross the inner end wall and the outer end wall, the spacers are sleeved on the bolts and clamped between the inner end wall and the outer end wall, the screw rods of the bolts are threaded in the threaded holes on the outer end wall, and the nuts of the bolts are pressed on the inner end wall.

[0012] A connecting ear is respectively arranged on both sides of the gear ring, and the connecting ear is fixed on the bridge housing in a detachable manner.

[0013] The bridge housing is provided with a first connecting wall and a second connecting wall located outside the first connecting wall. The planetary reducer and the gear reducer are both located between the first connecting wall and the second connecting wall. The inner end wall is pivotally connected to the first connecting wall, and the rotating shaft is pivotally connected to the second connecting wall.

[0014] A shaft head is protruding from the surface of the inner end wall away from the outer end wall, a first shaft hole is provided on the first connecting wall, a first bearing is embedded in the first shaft hole, and the shaft head is connected to the inner ring of the first bearing.

[0015] A second shaft hole is arranged on the second connecting wall, a second bearing is embedded in the second shaft hole, and the rotating shaft is connected to the inner ring of the second bearing.

[0016] A mounting recess is arranged on the surface of the inner end wall facing the outer end wall, a third bearing is embedded in the mounting recess, and the inner end of the rotating shaft is connected to the inner ring of the third bearing.

[0017] The bridge housing includes two opposing housings, which are fixedly connected together. A motor is installed on the outside of each housing, and a half shaft, a gear reducer, and a planetary reducer are arranged in each housing.

[0018] To achieve the above-mentioned second objective, the present invention adopts the following technical solution: An axle, including the electric drive structure of the axle.

[0019] The beneficial effects of the present invention are: When the vehicle is traveling on a normal road or a climbing road, the electric drive structure of the axle of the present invention has the connecting assembly in the first position, so that power can be transmitted between the rotating shaft and the sun gear. At this time, the electric drive structure of the vehicle includes a two-stage reduction mechanism formed by a gear reducer and a planetary reducer, so as to obtain a larger speed ratio; when the vehicle is on a downhill road, the motor can stop working, so that the connecting assembly is in the second position, the power between the rotating shaft and the sun gear is disconnected, and the reverse rotation of the sun gear will not drive the rotating shaft to rotate, and then will not drive the first gear to rotate in the reverse direction, thus protecting the motor. Since the present invention integrates the planetary reducer into the axle and makes the half shaft cross the planetary reducer and the gear reducer, while obtaining a larger speed ratio, the structure of the axle is simplified, the overall volume of the axle is reduced, so that a larger space can be provided on the axle for the installation of the motor, which is conducive to the arrangement of a larger power motor on the axle. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 It is a schematic diagram of the assembly of the present invention; Figure 3 for Figure 2 Assembly diagram of the planetary reducer; Figure 4 It is a cross-sectional view of the present invention and describes a working state of the present invention; Figure 5 It is a schematic diagram of another working state of the present invention. Implementation

[0021] Below, in conjunction with the accompanying drawings and specific embodiments, the present invention is further described: like Figure 1 , 2, 3, 4, and 5 show an electric drive structure of an axle of the present invention, which includes a bridge housing, two motors 40, two half-axles 20, a gear reducer, and a planetary reducer 50. The bridge housing can be composed of two opposing shells 10, and the two shells 10 are fixed together by bolt connection or other assembly methods. The two shells 10 surround an accommodating space, and each shell 10 is provided with a half-axle 20, and the two half-axles 20 extend from the middle position of the accommodating space to the two ends of the axle respectively. Each shell 10 is provided with a gear reducer and a planetary reducer 50, and the two gear reducers and the two planetary reducers 50 are all placed in the accommodating space. The gear reducer and the planetary reducer 50 arranged on the same shell 10 form a reduction mechanism. The two motors 40 are respectively placed on the outside of the two shells 10, and the body parts of the motors 40 are fixed on the shells 10. The power of the two motors 40 is transmitted to the two half-axles 20 through two sets of reduction mechanisms, and then the half-axles 20 transmit the power to the wheel ends of the axle; the gear reducer includes a first gear 31 and a second gear 32, and the first gear 31 and the second gear 32 are both pivotally connected to the shell 10. Specifically, the first gear 31 is synchronously connected to the output shaft of the motor 40 and is directly driven by the motor 40. The second gear 32 is synchronously connected to a rotating shaft 33, which crosses the second gear 32. The two can be connected by a key to connect them into a structure that can rotate synchronously. The rotating shaft 33 may be directly fixed to the second gear 32 so that the two become a whole to achieve the purpose of synchronous rotation. The rotating shaft 33 is pivoted on the housing 10, and the second gear 32 is linked with the first gear 31. The diameter of the second gear 32 is larger than the diameter of the first gear 31. The two may be directly meshed to achieve linkage to form a first stage of reduction. In other embodiments, other gears or gear sets may be arranged between the first gear 31 and the second gear 32 to achieve the linkage of the first gear 31 and the second gear 32. The rotating shaft 33 has a hollow structure extending from its inner end face to its outer end face, thereby forming an axial hole extending through its two end faces on the rotating shaft 33.The planetary reducer 50 includes a sun gear 51, a planet carrier, a planet gear 53, and a ring gear 54. The sun gear 51 is sleeved on the rotating shaft 33 and is pivotally matched with the rotating shaft 33, that is, the sun gear 51 can rotate relative to the rotating shaft 33. The ring gear 54 is fixedly connected to the housing 10. The planet carrier is installed on the housing 10 and is pivotally matched with the housing 10. The planet gear 53 is installed on the planet carrier, and the planet gear 53 is placed between the ring gear 54 and the sun gear 51. The inner side of the planet gear 53 meshes with the ring gear 54 and the inner side of the planet gear 53 meshes with the sun gear 51. 1 meshing, it should be noted that the planetary reducer 50 may include only one planetary gear 53, or may include multiple planetary gears 53 evenly distributed on the periphery of the sun gear 51. When the sun gear 51 rotates, it drives the planetary bracket to rotate; the half shaft 20 is inserted into the shaft hole of the rotating shaft 33, and it is pivotally matched with the rotating shaft 33. Specifically, after the half shaft 20 is inserted into the rotating shaft 33, it has a clearance fit with the inner wall of the shaft hole, and the half shaft 20 is connected to the planetary bracket, so that the planetary bracket can drive the half shaft 20 to rotate. A connecting assembly is provided between the rotating shaft 33 and the sun gear 51, and the connecting assembly can synchronously connect the rotating shaft 33 and the sun gear 51 together or disconnect the rotating shaft 33 and the sun gear 51 from each other, that is, the connecting assembly can move between a first position and a second position. When the connecting assembly is in the first position, the rotating shaft 33 and the sun gear 51 are synchronously connected together, so that power can be transmitted to the sun gear 51 via the rotating shaft 33, and then transmitted to the half shaft 20 via the planetary bracket, and finally transmitted to the outer end of the half shaft 20 to drive the wheel end of the axle. At this time, the planetary reducer 50 forms a second-stage reduction mechanism; when the connecting assembly is in the second position, the power connection between the rotating shaft 33 and the sun gear 51 is disconnected, so that the sun gear 51 can rotate relative to the rotating shaft 33.

[0022] When the vehicle is traveling on a normal road or a climbing road, the electric drive structure of the axle of the present invention is in the first position, so that the power can be transmitted between the rotating shaft 33 and the sun gear 51. At this time, the electric drive structure of the vehicle includes a two-stage reduction mechanism formed by a gear reducer and a planetary reducer, and a larger speed ratio is obtained; when the vehicle is on a downhill road, the motor 40 can stop working, so that the connecting assembly is in the second position, the power between the rotating shaft 33 and the sun gear 51 is disconnected, and the reverse rotation of the sun gear 51 will not drive the rotating shaft 33 to rotate, and then will not drive the first gear 31 to rotate in the reverse direction, so that the motor 40 is protected. Since the present invention integrates the planetary reducer into the axle and makes the half shaft cross the planetary reducer and the gear reducer, while obtaining a larger speed ratio, the structure of the axle is simplified, the overall volume of the axle is reduced, so that a larger space can be provided on the axle for the installation of the motor, which is conducive to the arrangement of a larger power motor on the axle.

[0023] In a preferred embodiment, the connection assembly of the present invention includes a first connection gear 331, a second connection gear 511, a linkage ring 332, and a toggle member 333; the first connection gear 331 is synchronously connected to the rotating shaft 33. For ease of assembly, the first connection gear 331 can be installed on the rotating shaft 33 by means of a key connection. Of course, the first connection gear 331 can also be integrally formed on the rotating shaft 33; the second connection gear 511 is synchronously connected to the sun gear 51. Specifically, the second connection gear 511 can be placed on the sun gear 51 by means of a key connection or integrally formed; the linkage ring 332 is sleeved on the outside of the first connection gear 331 and the second connection gear 511, and the inner edge of the linkage ring 332 is provided with convex teeth, which can mesh with the first connection gear 331 and the second connection gear 511. The toggle member 333 can drive the linkage ring 332 to move axially along the first connection gear 331 and the second connection gear 511; Figure 4 As shown, when the toggle member 333 drives the linkage ring 332 to move to Figure 4 In the position shown, the protruding teeth on the linkage ring 332 are meshed with the first connecting gear 331 and the second connecting gear 511 at the same time, so that the linkage ring 332 synchronously connects the first connecting gear 331 and the second connecting gear 511 together, that is, the connecting assembly is in the first position mentioned above, and power can be transmitted between the rotating shaft 33 and the sun gear 51. Figure 5 As shown, when the toggle member 333 drives the linkage ring 332 to move to Figure 5 When in the position shown, the convex teeth on the linkage ring 332 are disconnected from the meshing relationship with the second connecting gear 511, and are only meshed with the first connecting gear 331. At this time, the connecting assembly is in the above-mentioned second position, and the power transmission between the rotating shaft 33 and the sun gear 51 is disconnected; of course, the linkage ring 332 can also be shifted toward the sun gear 51 by using the shifting member 333 to disconnect the meshing relationship between the linkage ring 332 and the first connecting gear 331, and the linkage ring 332 is only meshed with the second connecting gear 511. In this way, the connecting assembly can also be in the above-mentioned second position.

[0024] In order to facilitate the installation of the above-mentioned second connecting gear 511, the outer end of the sun gear 51 is protruded from the outer end of the planetary bracket, so that the protruding part of the sun gear 51 forms a connecting part, the second connecting gear 511 is sleeved on the connecting part, and the second connecting gear 511 is synchronously connected with the connecting part.

[0025] In a preferred embodiment, the half shaft 20 passes through the inner end of the rotating shaft 33 and is synchronously connected to the planetary bracket. Specifically, the half shaft 20 includes a first end 201 located on the inner side and a second end opposite to the first end 201. The first end 201 passes through the inner end of the rotating shaft 33 and is connected to the planetary bracket synchronously. The second end passes through the outer end of the rotating shaft 33 and extends to the outer end of the axle. The planetary bracket includes an inner end wall 521 and an outer end wall 522 arranged opposite to the inner end wall 521. The inner end wall 521 and the outer end wall 522 are fixedly connected together. The first end 201 of the half shaft 20 passes through the inner end wall 521, and the first end 201 and the inner end wall 521 are synchronously connected together by key connection. The inner end wall 521 and the outer end wall 522 are fixed together in a detachable manner to facilitate the assembly of the planetary reducer and the assembly of the planetary reducer and the rotating shaft 33; a gear rotating shaft is provided on the planetary gear 53, and the two ends of the gear rotating shaft are respectively connected to the inner end wall 521 and the outer end wall 522, and the two ends of the gear rotating shaft are respectively pivotally matched with the inner end wall 521 and the outer end wall 522. Specifically, the two ends of the gear rotating shaft can be respectively installed on the inner end wall 521 and the outer end wall 522 through bearings; the planetary reducer 50 also includes a plurality of bolts 55 and a plurality of spacers 56, and the plurality of spacers 56 are respectively and one by one sleeved on the plurality of bolts 55, and the bolts 55 cross the inner end wall 521 and the outer end wall 522 from the inside to the outside. After the spacers 56 are sleeved on the bolts 55, the two ends thereof are respectively pressed against the inner end wall 521 and the outer end wall 522, that is, the spacers 56 are clamped between the inner end wall 521 and the outer end wall 522. The screw rod of the bolt 55 is screwed into the threaded hole 5221 on the outer end wall 522, and the nut of the bolt 55 is pressed on the inner side of the inner end wall 521. When assembling, the two ends of the gear shaft of the planetary gear 53 are respectively placed in the holes of the inner end wall 521 and the outer end wall 522, and the spacer 56 is aligned with the threaded hole 5221 of the outer end wall 522. The bolt is aligned with the spacer 56 to cross the inner end wall 521 and the outer end wall 522, and the bolt 55 is tightened to facilitate the assembly. The inner end wall 521 and the outer end wall 522 are tightened by bolts 55, and the two ends of the spacer 56 abut against the inner end wall 521 and the outer end wall 522, so that the spacing distance between the inner end wall 521 and the outer end wall 522 is maintained at a preset size, and then ensure that the two ends of the planetary gear 53 are respectively matched with the clearance of the inner end wall 521 and the outer end wall 522, so as to avoid the planetary gear 53 from interfering with the planetary bracket, and finally the ring gear 54 is sleeved on the outside of the plurality of planetary gears 53. A connecting ear 541 is respectively provided on both sides of the ring gear 54, and the connecting ear 541 is fixed to the housing 10 in a detachable manner. Specifically, the connecting ear 541 can be fixed to the housing 10 by bolts. After the assembly of the planetary gear 50 is completed, the sun gear 51 is sleeved on the rotating shaft 33, and then the connecting ear 541 is fixed to the housing 10 by bolts.

[0026] Each housing 10 is provided with a first connecting wall 11 and a second connecting wall 12, the second connecting wall 12 is located outside the first connecting wall 11, and the two are arranged at a certain distance, the planetary reducer 50 and the gear reducer are located between the first connecting wall 11 and the second connecting wall 12, the inner end wall 521 of the planetary bracket is pivoted on the first connecting wall 11, and the outer end of the rotating shaft 33 is pivoted on the second connecting wall 12. Specifically, a shaft head 5211 is protrudingly provided on the surface of the inner end wall 521 away from the outer end wall 522, the first connecting wall 11 is provided with an axial hole 111, and a first bearing 112 is embedded in the axial hole 111, the outer ring of the first bearing 112 is tightly matched with the inner wall of the axial hole 111, the shaft head 5211 is connected to the inner ring of the first bearing 112 and is tightly matched with the inner ring of the first bearing 112, so that the planetary bracket is pivoted on the housing 10, and the axial hole 111 on the first connecting wall 11 is used to provide radial support for the planetary bracket. A second axial hole 121 is provided on the second connecting wall 12, and a second bearing 122 is embedded in the second axial hole 121. The inner ring of the second bearing 122 is tightly fitted with the inner wall of the second axial hole 121, and the outer end of the rotating shaft 33 is connected to the inner ring of the second bearing 122 and is tightly fitted with the inner ring of the second bearing 122. In this way, the rotating shaft 33 is pivotally connected to the housing 10, and the axial hole 121 on the second connecting wall 12 is used to provide radial support for the rotating shaft 33.

[0027] A mounting recess 5212 is provided on the surface of the inner end wall 521 of the planetary bracket facing the outer end wall 522, and a third bearing 5213 is embedded in the mounting recess 5212. The outer ring of the third bearing 5213 is tightly fitted with the inner wall of the mounting recess 5212, and the inner end of the rotating shaft 33 is inserted into the inner ring of the third bearing 5213 and tightly fitted with the inner ring of the third bearing 5213, so that the inner end of the rotating shaft 33 is pivotally fitted with the planetary bracket.

[0028] It should be noted that the bridge housing of the present invention can be the above-mentioned two housings 10 assembled together. In other embodiments, the bridge housing can also be an integral structure. In order to prevent the motor 40 from operating at a high temperature, a cooling system can be configured on the motor 40. The cooling system can be composed of a heat sink and a pipe. The pipe has a heat-conducting medium. The heat-conducting medium exchanges heat with the heat sink inside the heat sink to form a heat-conducting medium with a lower temperature. The heat-conducting medium with a lower temperature enters the motor 40 body to exchange heat with the heating element inside the motor 40, forming a heat-conducting medium with a higher temperature and then flows back to the heat sink, thus forming a heat exchange loop to dissipate the heat generated by the motor 40 when it is working to the external environment.

[0029] The axle of the present invention includes the electric drive structure of the axle described above, and other structures of the axle are the same as those of the axle in the prior art, which will not be described in detail here.

[0030] The above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents, and these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. The electric drive structure of the axle is characterized by: Including bridge housing, motor, half shaft, gear reducer, and planetary reducer; The motor body is fixed on the bridge housing; the gear reducer includes a first gear driven by the motor, a second gear linked with the first gear, and a rotating shaft pivotally connected to the bridge housing is synchronously connected to the second gear; The planetary reducer includes a sun gear, a planetary carrier, a planetary gear, and a ring gear. The sun gear is sleeved on the rotating shaft and pivotally matched with the rotating shaft. The ring gear is fixedly connected to the bridge housing. The planetary carrier is pivotally connected to the bridge housing. The planetary gear is installed on the planetary carrier and meshed between the sun gear and the ring gear. The half shaft is inserted into the rotating shaft and is pivotally matched with the rotating shaft, and the half shaft is synchronously connected with the planetary bracket; A connecting assembly is arranged between the rotating shaft and the sun gear, and the connecting assembly can move between a first position for synchronously connecting the rotating shaft and the sun gear and a second position for disconnecting the rotating shaft and the sun gear from each other.

2. The electric drive structure of the vehicle axle according to claim 1, characterized in that: The connecting assembly includes a first connecting gear synchronously connected to the rotating shaft, a second connecting gear synchronously connected to the sun gear, a linkage ring sleeved on the outside of the first connecting gear and the second connecting gear, and a shifting member used to drive the linkage ring to move axially along the first connecting gear and the second connecting gear; the inner edge of the linkage ring is provided with a convex tooth that can mesh with the first connecting gear and the second connecting gear.

3. The electric drive structure of the vehicle axle according to claim 2, characterized in that: The outer end of the sun gear protrudes from the outer end of the planetary bracket to form a connecting portion, and the second connecting gear is sleeved on the connecting portion and synchronously connected with the connecting portion.

4. The electric drive structure of the vehicle axle according to claim 2, characterized in that: The half shaft includes a first end and a second end opposite to the first end. The first end passes through the inner end of the rotating shaft and is synchronously connected to the planetary bracket. The other end of the half shaft passes through the outer end of the rotating shaft and extends to the outer end of the axle.

5. The electric drive structure of the vehicle axle according to claim 4, characterized in that: The planet support comprises an inner end wall and an outer end wall arranged opposite to the inner end wall.

6. The electric drive structure of the vehicle axle according to claim 5, characterized in that: The inner end wall and the outer end wall are fixedly connected together in a detachable manner, and a gear shaft is arranged on the planetary gear, the two ends of the gear shaft are respectively connected to the inner end wall and the outer end wall, and the two ends of the gear are respectively pivotally matched with the inner end wall and the outer end wall.

7. The electric drive structure of the vehicle axle according to claim 6, characterized in that: The planetary reducer also includes a plurality of bolts and a plurality of spacers corresponding to the bolts one by one; the bolts cross the inner end wall and the outer end wall, the spacers are sleeved on the bolts and clamped between the inner end wall and the outer end wall, the screw rods of the bolts are threaded in the threaded holes on the outer end wall, and the nuts of the bolts are pressed on the inner end wall.

8. The electric drive structure of the vehicle axle according to claim 7, characterized in that: A connecting ear is respectively arranged on both sides of the gear ring, and the connecting ear is fixed on the bridge housing in a detachable manner.

9. The electric drive structure of the vehicle axle according to claim 5, characterized in that: The bridge housing is provided with a first connecting wall and a second connecting wall located outside the first connecting wall. The planetary reducer and the gear reducer are both located between the first connecting wall and the second connecting wall. The inner end wall is pivotally connected to the first connecting wall, and the rotating shaft is pivotally connected to the second connecting wall.

10. The electric drive structure of the vehicle axle according to claim 9, characterized in that: A shaft head is protruding from the surface of the inner end wall away from the outer end wall, a first shaft hole is provided on the first connecting wall, a first bearing is embedded in the first shaft hole, and the shaft head is connected to the inner ring of the first bearing.

11. The electric drive structure of the vehicle axle according to claim 9, characterized in that: A second shaft hole is arranged on the second connecting wall, a second bearing is embedded in the second shaft hole, and the rotating shaft is connected to the inner ring of the second bearing.

12. The electric drive structure of the vehicle axle according to claim 5, characterized in that: A mounting recess is arranged on the surface of the inner end wall facing the outer end wall, a third bearing is embedded in the mounting recess, and the inner end of the rotating shaft is connected to the inner ring of the third bearing.

13. The electric drive structure of the vehicle axle according to claim 1, characterized in that: The bridge housing includes two opposing housings, which are fixedly connected together. A motor is installed on the outside of each housing, and a half shaft, a gear reducer, and a planetary reducer are arranged in each housing.

14. A vehicle axle, characterized in that: An electric drive structure of an axle comprising any one of claims 1-13.

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