Drive axle, transmission structure, wheel drive system and vehicle

Abstract

The invention belongs to the technical field of vehicle steering, and relates to a drive axle, a transmission structure, a wheel drive system and a vehicle. The drive axle comprises a drive mechanism, a differential mechanism, a first speed reducing mechanism and a second speed reducing mechanism, wherein the first speed reducing mechanism and the second speed reducing mechanism are respectively in transmission connection with the drive mechanism; the differential mechanism comprises a first differential part and a second differential part, the first end of the first differential part is in transmission connection with the first speed reducing mechanism, and the first end of the second differential part is in transmission connection with the second speed reducing mechanism; and the second end of the first differential part is meshed with the second end of the second differential part. According to the drive axle, an existing differential mechanism is omitted, cost and noise can be reduced, and meanwhile the transverse space utilization rate of the drive axle can be increased.

Description

Technical Field

[0001] The invention belongs to the technical field of vehicle steering, and in particular relates to a drive axle, a transmission structure, a wheel drive system and a vehicle. Background Art

[0002] In the existing double planetary gear differential splitting method, a single motor is often used for driving, and a reduction assembly is respectively connected to the two output ends of the motor, and then a differential is installed between the two reduction assemblies.

[0003] However, the existing differential has a complex structure, occupies a large space, and has a high cost. Summary of the invention

[0004] The technical problem to be solved by the present invention is: to provide a drive axle, a transmission structure, a wheel drive system and a vehicle in view of the high cost of the existing dual planetary gear differential splitting differential.

[0005] To solve the above technical problems, on the one hand, an embodiment of the present invention provides a drive axle, including a drive mechanism, a differential mechanism, a first reduction mechanism and a second reduction mechanism, wherein the first reduction mechanism and the second reduction mechanism are respectively connected to the drive mechanism in a transmission manner;

[0006] The differential mechanism comprises a first differential member and a second differential member, wherein a first end of the first differential member is transmission-connected to the first reduction mechanism, and a first end of the second differential member is transmission-connected to the second reduction mechanism;

[0007] The second end of the first differential member meshes with the second end of the second differential member.

[0008] According to the drive axle of the embodiment of the present invention, the first reduction mechanism and the second reduction mechanism are respectively connected to the drive mechanism in a transmission manner, and the differential mechanism is connected in a transmission manner between the two reduction mechanisms. Specifically, the first end of the first differential is connected to the first reduction mechanism in a transmission manner, the first end of the second differential is connected to the second reduction mechanism in a transmission manner, the second end of the first differential is meshed with the second end of the second differential, and the differential is achieved through the cooperation of the first differential and the second differential. The drive axle eliminates the use of the existing differential, which can reduce costs and noise, and at the same time improve the lateral space utilization of the drive axle.

[0009] Optionally, the first differential member includes a first differential shaft, a first differential gear and a second differential gear, the first differential shaft is connected between the first differential gear and the second differential gear, the first differential gear is transmission-connected to the first reduction mechanism, and the second differential gear is meshed with the second end of the second differential member.

[0010] Optionally, the second differential member includes a second differential shaft, a third differential gear and a fourth differential gear, the second differential shaft is connected between the third differential gear and the fourth differential gear, the third differential gear is transmission-connected to the second reduction mechanism, and the fourth differential gear is meshed with the second end of the first differential member.

[0011] Optionally, the second differential gear meshes with the fourth differential gear.

[0012] Optionally, the driving mechanism has a first output end and a second output end;

[0013] The first reduction mechanism comprises a first primary reduction assembly, the first primary reduction assembly being transmission-connected between the first output end of the drive mechanism and the first end of the first differential member; and / or,

[0014] The second reduction mechanism includes a second primary reduction assembly, and the second primary reduction assembly is transmission-connected between the second output end of the drive mechanism and the first end of the second differential.

[0015] Optionally, the first primary reduction assembly includes a first planetary gear and a first ring gear, the first planetary gear is suitable for driving connection with the first output end of the driving mechanism, the inner ring of the first ring gear is meshed with the first planetary gear, and the outer ring of the first ring gear is suitable for driving connection with the first end of the first differential; and / or,

[0016] The second first-stage reduction assembly includes a second planetary gear and a second ring gear, the second planetary gear is suitable for transmission connection with the second output end of the drive mechanism, the inner ring of the second ring gear is meshed with the second planetary gear, and the outer ring of the second ring gear is suitable for transmission connection with the first end of the second differential.

[0017] Optionally, the outer ring of the first gear ring is meshed with the first differential gear, and the outer ring of the second gear ring is meshed with the third differential gear.

[0018] Optionally, the first gear ring is coaxially arranged with the second gear ring.

[0019] Optionally, the first gear ring includes a first gear ring segment, a second gear ring segment, and a first connecting segment connected between the first gear ring segment and the second gear ring segment, the inner ring of the first gear ring segment is meshed with the first planetary gear, and the outer ring of the first gear ring segment or the outer ring of the second gear ring segment is suitable for driving connection with the first end of the first differential; and / or,

[0020] The second gear ring includes a third gear ring segment, a fourth gear ring segment and a second connecting segment connected between the third gear ring segment and the fourth gear ring segment, the inner ring of the third gear ring segment is meshed with the second planetary gear, and the outer ring of the third gear ring segment or the outer ring of the fourth gear ring segment is suitable for driving connection with the first end of the second differential.

[0021] Optionally, the first reduction mechanism further includes a first two-stage reduction assembly, the first two-stage reduction assembly being transmission-connected between the first output end of the driving mechanism and the first one-stage reduction assembly; and / or;

[0022] The second reduction mechanism further includes a second two-stage reduction assembly, and the second two-stage reduction assembly is transmission-connected between the second output end of the driving mechanism and the second one-stage reduction assembly.

[0023] Optionally, the first secondary reduction assembly comprises a first driving gear set and a first driven gear set, the first output end of the driving mechanism is transmission-connected to the first driving gear set, the first driven gear set is transmission-connected to the first driving gear set, and the first driven gear set is suitable for transmission-connected to the first primary reduction assembly; and / or,

[0024] The second secondary reduction assembly includes a second driving gear set and a second driven gear set. The second output end of the drive mechanism is transmission-connected to the second driving gear set, the second driven gear set is transmission-connected to the second driving gear set, and the second driven gear set is suitable for transmission-connected to the second primary reduction assembly.

[0025] Optionally, the first driven gear set includes a first driven wheel and a first sun wheel coaxially connected to the first driven wheel, the first driven wheel is suitable for driving connection with the first driving gear set, and the first sun wheel is suitable for driving connection with the first primary reduction assembly; and / or,

[0026] The second driven gear set includes a second driven wheel and a second sun wheel coaxially connected to the second driven wheel, the second driven wheel is suitable for transmission connection with the second driving gear set, and the second sun wheel is suitable for transmission connection with the second primary reduction assembly.

[0027] Optionally, the first ring gear is coaxially arranged with the first sun gear; and / or,

[0028] The second ring gear is coaxially arranged with the second sun gear.

[0029] Optionally, in the width direction of the vehicle, the first sun gear and the first primary reduction assembly are both located on the side of the first driven wheel facing away from the driving mechanism, and / or the second sun gear and the second primary reduction assembly are both located on the side of the second driven wheel facing away from the driving mechanism.

[0030] Optionally, the first secondary reduction assembly further includes a first driven gear bearing, the first driven gear bearing is coaxially connected to the first driven gear set, and the first driven gear bearing is used to support the first driven gear set; and / or,

[0031] The second secondary reduction assembly also includes a second driven gear bearing, which is coaxially connected to the second driven gear set, and the second driven gear bearing is used to support the second driven gear set.

[0032] Optionally, the first driven gear set further includes a first driven column, the first driven column is coaxially connected to the first driven wheel, and the first driven column is located on a side facing away from the first sun gear, and the first driven gear bearing is coaxially sleeved on the first driven column; and / or,

[0033] The second driven gear set also includes a third driven column, which is coaxially connected to the second driven gear and located on the side facing away from the second sun gear. The second driven gear bearing is coaxially sleeved on the third driven column.

[0034] Optionally, the first secondary reduction assembly further includes a first driving gear bearing, the first driving gear bearing is coaxially connected to the first driving gear set, and the first driving gear bearing is used to support the first driving gear set; and / or,

[0035] The second two-stage reduction assembly further includes a second driving gear bearing, which is coaxially connected to the second driving gear set, and the second driving gear bearing is used to support the second driving gear set.

[0036] Optionally, the first driving gear set includes a first driving wheel and a first driving column coaxially connected to the first driving wheel, the first output end of the driving mechanism is coaxially connected to the first driving column, the first driven gear set is transmission-connected to the first driving wheel, and the first driving gear bearing is coaxially sleeved on the first driving column; and / or,

[0037] The second driving gear set includes a second driving wheel and a second driving column coaxially connected to the second driving wheel, the second output end of the driving mechanism is coaxially connected to the second driving column, the second driven gear set is transmission-connected to the second driving wheel, and the second driving gear bearing is coaxially sleeved on the second driving column.

[0038] Optionally, a first bearing is arranged between the first gear ring and the first driven wheel, and the first bearing is arranged coaxially with the first gear ring; and / or,

[0039] A second bearing is arranged between the second gear ring and the second driven wheel, and the second bearing is arranged coaxially with the second gear ring.

[0040] Optionally, the first output end and the second output end are coaxially arranged.

[0041] Alternatively, the drive mechanism is located between the first reduction mechanism and the second reduction mechanism in the width direction of the vehicle.

[0042] Optionally, the driving mechanism includes a dual-axis motor having a first output shaft constituting the first output end and a second output shaft constituting the second output end, the first output shaft of the dual-axis motor being transmission-connected to the first secondary reduction assembly, and the second output shaft of the dual-axis motor being transmission-connected to the second secondary reduction assembly.

[0043] Optionally, the driving mechanism includes a first single-axis motor and a second single-axis motor, the first single-axis motor having a first output shaft constituting the first output end, the second single-axis motor having a second output shaft constituting the second output end, the first output shaft being transmission-connected to the first secondary reduction assembly, and the second output shaft being transmission-connected to the second secondary reduction assembly.

[0044] Optionally, the driving mechanism includes a single-axis motor and an intermediate transition shaft, the single-axis motor has a first output shaft constituting the first output end, the first output shaft is transmission-connected to the first secondary reduction assembly, and the first secondary reduction assembly and the second secondary reduction assembly are coaxially connected via the intermediate transition shaft.

[0045] Optionally, the drive axle further includes a first hub mechanism and a second hub mechanism, the first hub mechanism is transmission-connected to the first primary reduction assembly, and the second hub mechanism is transmission-connected to the second primary reduction assembly.

[0046] Optionally, in the width direction of the vehicle, the first hub mechanism is located on a side of the first primary reduction assembly facing away from the drive mechanism, and the second hub mechanism is located on a side of the second primary reduction assembly facing away from the drive mechanism.

[0047] Optionally, the first hub mechanism comprises a first planet carrier, the first planet carrier is connected to the axle of the first planetary gear, and the first planet carrier is coaxially arranged with the first driven gear set; and / or,

[0048] The second hub mechanism includes a second planet carrier, the second planet carrier is connected to the axle of the second planetary gear, and the second planet carrier is coaxially arranged with the second driven gear set.

[0049] Optionally, a third bearing is provided between the first ring gear and the first planet carrier, and a fourth bearing is provided between the second ring gear and the second planet carrier.

[0050] Optionally, a fifth bearing is provided between the first sun gear and the first planet carrier, and a sixth bearing is provided between the second sun gear and the second planet carrier.

[0051] Optionally, the first driven gear set further includes a second driven column, the second driven column is coaxially connected to the first sun gear, and the second driven column is located on a side of the first sun gear facing away from the first driven gear, and the fifth bearing is coaxially sleeved on the second driven column;

[0052] The second driven gear set also includes a fourth driven column, which is coaxially connected to the second sun gear and located on a side of the second sun gear facing away from the second driven gear, and the sixth bearing is coaxially sleeved on the fourth driven column.

[0053] Optionally, the first hub mechanism further comprises a first hub inner bearing and a first hub outer bearing, and the first hub inner bearing and the first hub outer bearing are coaxially sleeved on the first planet carrier;

[0054] The second hub mechanism further comprises a second hub inner bearing and a second hub outer bearing, wherein the second hub inner bearing and the second hub outer bearing are coaxially sleeved on the second planet carrier.

[0055] Optionally, in the width direction of the vehicle, the first wheel hub inner bearing is located between the first wheel hub outer bearing and the first primary reduction assembly, and the second wheel hub inner bearing is located between the second wheel hub outer bearing and the second primary reduction assembly.

[0056] On the other hand, an embodiment of the present invention provides a transmission structure, including a differential mechanism, a first reduction mechanism and a second reduction mechanism, wherein the differential mechanism includes a first differential member and a second differential member, wherein a first end of the first differential member is transmission-connected to the first reduction mechanism, and a first end of the second differential member is transmission-connected to the second reduction mechanism;

[0057] The second end of the first differential member meshes with the second end of the second differential member.

[0058] Optionally, the first differential member includes a first differential shaft, a first differential gear and a second differential gear, the first differential shaft is connected between the first differential gear and the second differential gear, the first differential gear is transmission-connected to the first reduction mechanism, and the second differential gear is meshed with the second end of the second differential member.

[0059] Optionally, the second differential member includes a second differential shaft, a third differential gear and a fourth differential gear, the second differential shaft is connected between the third differential gear and the fourth differential gear, the third differential gear is transmission-connected to the second reduction mechanism, and the fourth differential gear is meshed with the second end of the first differential member.

[0060] Optionally, the second differential gear meshes with the fourth differential gear.

[0061] On the other hand, an embodiment of the present invention provides a wheel drive system, which includes the above-mentioned drive axle, or includes the above-mentioned transmission structure.

[0062] On the other hand, an embodiment of the present invention provides a vehicle, which includes the above-mentioned drive axle, or includes the above-mentioned transmission structure, or includes the above-mentioned wheel drive system. BRIEF DESCRIPTION OF THE DRAWINGS

[0063] Figure 1 is a schematic diagram of a drive axle provided in Embodiment 1 of the present invention;

[0064] Figure 2 yes Figure 1 An exploded diagram of the drive axle;

[0065] Figure 3 yes Figure 1 A main sectional view of a drive axle;

[0066] Figure 4 yes Figure 1 A side sectional view of a drive axle;

[0067] Figure 5 1 is a schematic diagram of the principle of the drive axle provided in the first embodiment of the present invention;

[0068] Figure 6 It is a schematic diagram of the principle of the drive axle provided in the second embodiment of the present invention.

[0069] Figure 7 It is a schematic diagram of the principle of the drive axle provided in the third embodiment of the present invention.

[0070] The reference numerals in the specification are as follows:

[0071] 1. driving mechanism; 11. dual-axis motor; 111. first output shaft; 112. second output shaft;

[0072] 2. differential mechanism; 21. first differential member; 211. first differential shaft; 212. first differential gear; 213. second differential gear; 22. second differential member; 221. second differential shaft; 222. third differential gear; 223. fourth differential gear;

[0073] 3. First reduction mechanism; 31. First two-stage reduction assembly; 311. First driving gear set; 3111. First driving wheel; 3112. First driving column; 312. First driven gear set; 3121. First driven wheel; 3122. First sun gear; 3123. First driven column; 3124. Second driven column; 313. First driven gear bearing; 314. First driving gear bearing; 32. First one-stage reduction assembly; 321. First planetary gear; 322. First ring gear; 3221. First gear ring segment; 3222. Second gear ring segment; 3223. First connecting segment;

[0074] 4. Second reduction mechanism; 41. Second secondary reduction assembly; 411. Second driving gear set; 412. Second driven gear set; 4121. Second driven gear; 4122. Second sun gear; 4123. Third driven column; 4124. Fourth driven column; 413. Second driven gear bearing; 414. Second driving gear bearing; 42. Second primary reduction assembly; 421. Second planetary gear; 422. Second ring gear;

[0075] 5. First wheel hub mechanism; 51. First planet carrier; 52. First wheel hub inner bearing; 53. First wheel hub outer bearing; 54. First round nut;

[0076] 6. Second wheel hub mechanism; 61. Second planet carrier; 62. Second wheel hub inner bearing; 63. Second wheel hub outer bearing; 64. Second round nut;

[0077] 7a, first bearing; 7b, second bearing;

[0078] 8a, third bearing; 8b, fourth bearing;

[0079] 9a, fifth bearing; 9b, sixth bearing. DETAILED DESCRIPTION

[0080] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0081] Embodiment 1

[0082] like Figures 1 to 5 As shown, the drive axle provided by the embodiment of the present invention comprises a drive mechanism 1, a differential mechanism 2, a first reduction mechanism 3 and a second reduction mechanism 4, wherein the first reduction mechanism 3 and the second reduction mechanism 4 are respectively connected to the drive mechanism 1 in driving connection.

[0083] The differential mechanism 2 includes a first differential member 21 and a second differential member 22 . The first end of the first differential member 21 is transmission-connected to the first reduction mechanism 3 , and the first end of the second differential member 22 is transmission-connected to the second reduction mechanism 4 .

[0084] The second end of the first differential member 21 is meshed with the second end of the second differential member 22 .

[0085] In the drive axle provided by the embodiment of the present invention, the first reduction mechanism 3 and the second reduction mechanism 4 are respectively connected to the drive mechanism 1 by transmission, and the differential mechanism 2 is connected between the two reduction mechanisms (the first reduction mechanism 3 and the second reduction mechanism 4 by transmission. Specifically, the first end of the first differential 21 is connected to the first reduction mechanism 3 by transmission, the first end of the second differential 22 is connected to the second reduction mechanism 4 by transmission, the second end of the first differential 21 is meshed with the second end of the second differential 22, and the differential is achieved by the cooperation of the first differential 21 and the second differential 22. The drive axle eliminates the use of the existing differential, which can reduce costs and noise, and at the same time improve the lateral space utilization of the drive axle.

[0086] In one embodiment, if Figure 1 and Figure 2 As shown, the first differential member 21 includes a first differential shaft 211, a first differential gear 212 and a second differential gear 213. The first differential shaft 211 is connected between the first differential gear 212 and the second differential gear 213 to form the first differential member 21. The first differential gear 212 serves as the first end of the first differential member 21, and the second differential gear 213 serves as the second end of the first differential member 21.

[0087] The first differential gear 212 is transmission-connected to the first reduction mechanism 3 , and the second differential gear 213 is meshed with the second end of the second differential member 22 , thereby realizing the transmission connection between the first differential member 21 and the first reduction mechanism 3 , and the transmission connection between the first differential member 21 and the second differential member 22 .

[0088] In one embodiment, if Figure 1 and Figure 2As shown, the second differential member 22 includes a second differential shaft 221, a third differential gear 222 and a fourth differential gear 223. The second differential shaft 221 is connected between the third differential gear 222 and the fourth differential gear 223 to form the second differential member 22. The third differential gear 222 serves as the first end of the second differential member 22, and the fourth differential gear 223 serves as the second end of the second differential member 22.

[0089] The third differential gear 222 is transmission-connected to the second reduction mechanism 4 , and the fourth differential gear 223 is meshed with the second end of the first differential member 21 , thereby realizing the transmission connection between the second differential member 22 and the second reduction mechanism 4 , and the transmission connection between the second differential member 22 and the first differential member 21 .

[0090] In one embodiment, if Figure 1 and Figure 2 As shown, the second differential gear 213 is meshed with the fourth differential gear 223 to achieve a transmission connection between the second differential member 22 and the first differential member 21 , thereby achieving the differential function of the differential mechanism 2 .

[0091] In one embodiment, if Figures 1 to 5 As shown, the driving mechanism 1 has a first output end and a second output end.

[0092] The first reduction mechanism 3 includes a first two-stage reduction assembly 31 and a first one-stage reduction assembly 32, wherein the first two-stage reduction assembly 31 is transmission-connected to the first output end of the drive mechanism 1, and the first one-stage reduction assembly 32 is transmission-connected between the first two-stage reduction assembly 31 and the first end of the first differential member (21).

[0093] The second reduction mechanism 4 includes a second two-stage reduction assembly 41 and a second one-stage reduction assembly 42, wherein the second two-stage reduction assembly 41 is transmission-connected to the second output end of the driving mechanism 1, and the second one-stage reduction assembly 42 is transmission-connected between the second two-stage reduction assembly 41 and the first end of the second differential member (22).

[0094] The drive axle is provided with a primary reduction assembly and a secondary reduction assembly at each output end of the drive mechanism 1, so that the output end of the drive mechanism 1 is sequentially connected to the secondary reduction assembly and the primary reduction assembly of the corresponding reduction mechanism, and the differential mechanism 2 is connected between the two primary reduction assemblies. Since the primary reduction assembly has a lower rotation speed than the secondary reduction assembly, the precision requirements for the gears in the primary reduction assembly can be reduced, the cost can be reduced, and the noise can be reduced. In addition, since the secondary reduction assembly can avoid the drive mechanism 1, there is no need to set up an additional steering wheel, which makes the structure of the drive axle simpler and can further reduce the cost.

[0095] In one embodiment, if Figures 1 to 5 As shown, the driving mechanism 1 is located between the first reduction mechanism 3 and the second reduction mechanism 4 in the width direction of the vehicle, so that the driving axle forms a symmetrical structure, which is more conducive to driving the wheels on both sides of the vehicle.

[0096] In one embodiment, if Figures 1 to 5 As shown, the first output end and the second output end are coaxially arranged to form a symmetrical structure for the drive bridge.

[0097] In one embodiment, if Figures 1 to 5 As shown, the driving mechanism 1 includes a dual-axis motor 11, and the dual-axis motor 11 has a first output shaft 111 constituting the first output end and a second output shaft 112 constituting the second output end, the first output shaft 111 of the dual-axis motor 11 is transmission-connected to the first secondary reduction assembly 31, and the second output shaft 112 of the dual-axis motor 11 is transmission-connected to the second secondary reduction assembly 41, so as to realize the transmission connection between the driving mechanism 1 and the first secondary reduction assembly 31 and the second secondary reduction assembly 41. Preferably, the two output shafts of the dual-axis motor 11 have the same rotation speed.

[0098] In other embodiments not shown in the figures, the driving mechanism may also include a first single-axis motor and a second single-axis motor, the first single-axis motor having a first output shaft constituting the first output end, the second single-axis motor having a second output shaft constituting the second output end, the first output shaft of the first single-axis motor and the second output shaft of the second single-axis motor being coaxially arranged and having the same rotation speed, the first output shaft being transmission-connected to the first secondary reduction assembly, and the second output shaft being transmission-connected to the second secondary reduction assembly, thereby realizing the transmission connection between the driving mechanism and the first reduction mechanism and the second reduction mechanism.

[0099] Alternatively, the driving mechanism may also include a single-axis motor and an intermediate transition shaft, wherein the single-axis motor has a first output shaft constituting the first output end, the first output shaft is transmission-connected to the first secondary reduction assembly, the first secondary reduction assembly and the second secondary reduction assembly are coaxially connected via the intermediate transition shaft, at this time, the driving mechanism is directly transmission-connected to the first reduction mechanism, and the driving mechanism is indirectly transmission-connected to the second reduction mechanism via the intermediate transition shaft.

[0100] In one embodiment, if Figures 1 to 5As shown, the first two-stage reduction assembly 31 includes a first driving gear set 311 and a first driven gear set 312, the first output end of the driving mechanism 1 is transmission-connected to the first driving gear set 311, the first driven gear set 312 is transmission-connected to the first driving gear set 311, and the first driven gear set 312 is suitable for transmission connection to the first one-stage reduction assembly 32.

[0101] Through the first output end of the driving mechanism 1 and the first driving gear set 311, power transmission between the first output end of the driving mechanism 1 and the first driving gear set 311 can be achieved, and then through the first driven gear set 312 and the first driving gear set 311, the first reduction transmission of the first reduction mechanism 3 is achieved. Since the first driven gear set 312 is suitable for transmission connection with the first first reduction assembly 32, the output power of the first second reduction assembly 31 can be transmitted to the first first reduction assembly 32.

[0102] In one embodiment, if Figure 2 As shown, the first driven gear set 312 includes a first driven wheel 3121 and a first sun wheel 3122 coaxially connected to the first driven wheel 3121, and the first driven wheel 3121 is drivingly connected to the first driving gear set 311 to realize the first-stage reduction transmission of the first reduction mechanism 3. The first sun wheel 3122 is suitable for drivingly connecting to the first-stage reduction assembly 32, so as to realize the power transmission between the first-stage reduction assembly 31 and the first-stage reduction assembly 32.

[0103] In one embodiment, if Figures 1 to 5 As shown, in the width direction of the vehicle, the first sun gear 3122 and the first primary reduction assembly 32 are both located on the side of the first driven wheel 3121 facing away from the driving mechanism 1 , forming the first reduction mechanism 3 .

[0104] In one embodiment, if Figures 2 to 4 As shown, the first secondary reduction assembly 31 also includes a first driven gear bearing 313, which is coaxially connected to the first driven gear set 312, and the first driven gear bearing 313 is connected to the bridge housing, and the first driven gear bearing 313 is used to support the first driven gear set 312.

[0105] In one embodiment, if Figure 2As shown, the first driven gear set 312 also includes a first driven column 3123, which is coaxially connected to the first driven wheel 3121, and the first driven column 3123 is located on the side of the first driven wheel 3121 facing away from the first sun gear 3122, and the first driven gear bearing 313 is coaxially sleeved on the first driven column 3123 to achieve the connection between the first driven gear bearing 313 and the first driven gear set 312.

[0106] In one embodiment, if Figures 2 to 4 As shown, the first two-stage reduction assembly 31 also includes a first driving gear bearing 314, which is coaxially connected to the first driving gear set 311, and the first driving gear bearing 314 is connected to the bridge housing, and the first driving gear bearing 314 is used to support the first driving gear set 311.

[0107] In one embodiment, if Figure 2 As shown, the first driving gear set 311 includes a first driving wheel 3111 and a first driving column 3112 coaxially connected to the first driving wheel 3111. The first output end of the driving mechanism 1 is coaxially connected to the first driving column 3112 to achieve power transmission between the first output end of the driving mechanism 1 and the first driving column 3112. The first driven wheel 3121 of the first driven gear set 312 is meshed with the first driving wheel 3111, and the first driving gear bearing 314 is coaxially sleeved on the first driving column 3112 to achieve the installation of the first driving gear bearing 314 on the first driving gear set 311.

[0108] In one embodiment, if Figures 2 to 5 As shown, the first primary reduction assembly 32 includes a first planetary gear 321 and a first ring gear 322 , and the first planetary gear 321 is meshed with the first sun gear 3122 to achieve power transmission between the first secondary reduction assembly 31 and the first primary reduction assembly 32 .

[0109] The inner ring of the first ring gear 322 is meshed with the first planetary gear 321, and the outer ring of the first ring gear 322 is suitable for transmission connection with the first end of the first differential 21. Specifically, the outer ring of the first ring gear 322 is meshed with the first differential gear 212, thereby realizing the transmission connection between the first end of the first differential 21 and the first reduction mechanism 3.

[0110] In one embodiment, if Figure 3 and Figure 4As shown, the first ring gear 322 is coaxially arranged with the first sun gear 3122 to ensure the transmission connection between the first ring gear 322 and the first sun gear 3122 .

[0111] In one embodiment, if Figures 2 to 5 As shown, the first gear ring 322 includes a first gear ring segment 3221, a second gear ring segment 3222 and a first connecting segment 3223 connected between the first gear ring segment 3221 and the second gear ring segment 3222, the inner ring of the first gear ring segment 3221 is meshed with the first planetary gear 321, and the outer ring of the first gear ring segment 3221 is suitable for transmission connection with the first end of the first differential member 21, that is, the outer ring of the first gear ring segment 3221 can be meshed with the first differential gear 222, so as to realize the transmission connection between the first gear ring 322 and the first end of the first differential member 21.

[0112] In one embodiment, if Figures 2 to 4 As shown, a first bearing 7a is provided between the first gear ring 322 and the first driven wheel 3121, and the first bearing 7a is coaxially arranged with the first gear ring 322. By providing the first bearing 7a, the friction between the first gear ring 322 and the first driven gear set 312 is reduced, and the relative rotation between the first gear ring 322 and the first driven gear set 312 is made more stable.

[0113] In one embodiment, if Figures 1 to 5 As shown, the second two-stage reduction assembly 41 includes a second driving gear set 411 and a second driven gear set 412, the second output end of the driving mechanism 1 is transmission-connected to the second driving gear set 411, the second driven gear set 412 is transmission-connected to the second driving gear set 411, and the second driven gear set 412 is suitable for transmission connection to the second first-stage reduction assembly 42.

[0114] The second output end of the driving mechanism 1 is connected to the second driving gear set 411 through transmission connection, so that the power transmission between the second output end of the driving mechanism 1 and the second driving gear set 411 can be realized, and then the first-stage reduction transmission of the second reduction mechanism 4 is realized through the second driven gear set 412 connected to the second driving gear set 411 through transmission connection. Since the second driven gear set 412 is suitable for transmission connection with the second first-stage reduction assembly 42, the output power of the second second-stage reduction assembly 41 can be transmitted to the second first-stage reduction assembly 42.

[0115] In one embodiment, if Figure 2As shown, the structure of the second driven gear set 412 is consistent with that of the first driven gear set 312. The second driven gear set 412 includes a second driven wheel 4121 and a second sun wheel 4122 coaxially connected to the second driven wheel 4121. The second driven wheel 4121 is drivingly connected to the second driving gear set 411 to realize the first-stage reduction transmission of the second reduction mechanism 4. The second sun wheel 4122 is suitable for drivingly connecting to the second first-stage reduction assembly 42, so as to realize the power transmission between the second second-stage reduction assembly 41 and the second first-stage reduction assembly 42.

[0116] In one embodiment, if Figures 1 to 5 As shown, in the width direction of the vehicle, the second sun gear 4122 and the second primary reduction assembly 42 are both located on the side of the second driven wheel 4121 facing away from the driving mechanism 1 , forming the second reduction mechanism 4 .

[0117] In one embodiment, if Figures 2 to 4 As shown, the second secondary reduction assembly 41 also includes a second driven gear bearing 413, which is coaxially connected to the second driven gear set 412, and the second driven gear bearing 413 is connected to the bridge housing, and the second driven gear bearing 413 is used to support the second driven gear set 412.

[0118] In one embodiment, if Figure 2 As shown, the second driven gear set 412 also includes a third driven column 4123, which is coaxially connected to the second driven wheel 4121, and the third driven column 4123 is located on the side of the second driven wheel 4121 facing away from the second sun gear 4122, and the second driven gear bearing 413 is coaxially sleeved on the third driven column 4123 to realize the connection between the second driven gear bearing 413 and the second driven gear set 412.

[0119] In one embodiment, if Figures 2 to 4 As shown, the second secondary reduction assembly 41 also includes a second driving gear bearing 414, which is coaxially connected to the second driving gear set 411, and the second driving gear bearing 414 is connected to the bridge housing, and the second driving gear bearing 414 is used to support the second driving gear set 411.

[0120] In one embodiment, if Figure 2As shown, the structure of the second driving gear set 411 is consistent with that of the first driving gear set 311. The second driving gear set 411 includes a second driving wheel and a second driving column coaxially connected to the second driving wheel. The second output end of the driving mechanism 1 is coaxially connected to the second driving column to achieve power transmission between the second output end of the driving mechanism 1 and the second driving column. The second driven wheel 4121 of the second driven gear set 412 is meshed with the second driving wheel, and the second driving gear bearing 414 is coaxially sleeved on the second driving column to achieve the installation of the second driving gear bearing 414 on the second driving gear set 411.

[0121] In one embodiment, if Figures 2 to 5 As shown, the second primary reduction assembly 42 includes a second planetary gear 421 and a second ring gear 422 , and the second planetary gear 421 is meshed with the second sun gear 4122 to achieve power transmission between the second secondary reduction assembly 41 and the second primary reduction assembly 42 .

[0122] The inner ring of the second ring gear 422 is meshed with the second planetary gear 421, and the outer ring of the second ring gear 422 is suitable for transmission connection with the first end of the second differential 22. Specifically, the outer ring of the second ring gear 422 is meshed with the third differential gear 222, thereby realizing the transmission connection between the first end of the second differential 22 and the second reduction mechanism 4.

[0123] In one embodiment, if Figure 3 and Figure 4 As shown, the second ring gear 422 is coaxially arranged with the second sun gear 4122 to ensure the transmission connection between the second ring gear 422 and the second sun gear 4122 .

[0124] In one embodiment, the second gear ring 422 includes a third gear ring segment, a fourth gear ring segment and a second connecting segment connected between the third gear ring segment and the fourth gear ring segment, the inner ring of the third gear ring segment is meshed with the second planetary gear 421, and the outer ring of the third gear ring segment is suitable for transmission connection with the first end of the second differential member 22, that is, the outer ring of the third gear ring segment can be meshed with the third differential gear 222, thereby realizing the transmission connection between the second gear ring 422 and the first end of the second differential member 22.

[0125] In one embodiment, if Figure 3 and Figure 4 As shown, the first gear ring 322 and the second gear ring 422 are coaxially arranged.

[0126] In one embodiment, if Figures 2 to 4As shown, a second bearing 7b is provided between the second gear ring 422 and the second driven wheel 4121, and the second bearing 7b is coaxially provided with the second gear ring 422. By providing the second bearing 7b, the friction between the second gear ring 422 and the second driven gear set 412 is reduced, and the relative rotation between the second gear ring 422 and the second driven gear set 412 is made smoother.

[0127] In one embodiment, if Figures 2 to 4 As shown, the differential mechanism 2 includes a first differential member 21 and a second differential member 22 , wherein the first end of the first differential member 21 is meshed with the first ring gear 322 of the first primary reduction assembly 32 , and the first end of the second differential member 22 is meshed with the second ring gear 422 of the second primary reduction assembly 42 .

[0128] The second end of the first differential member 21 is meshed with the second end of the second differential member 22 .

[0129] By setting the first differential 21 and the second differential 22, and designing the connection between the first differential 21 and the second differential 22, the first differential 21 is meshed with the first ring gear 322 of the first primary reduction assembly 32, and the second differential 22 is meshed with the second ring gear 422 of the second primary reduction assembly 42, so that the differential mechanism 2 is set between the ring gears of the secondary reduction assemblies of the two reduction mechanisms. Furthermore, by meshing the first differential 21 and the second differential 22, the vehicle steering control can be realized by utilizing the differential function of the differential mechanism 2 under different working conditions (such as straight driving or turning, etc.).

[0130] In one embodiment, if Figure 1 and Figure 2 As shown, the first differential gear 212 is meshed with the first ring gear 322 of the first primary reduction assembly 32 , thereby achieving meshing of the first differential member 21 with the first ring gear 322 of the first primary reduction assembly 32 .

[0131] The second differential gear 213 meshes with the second end of the second differential member 22 (the fourth differential gear 223 ), thereby achieving meshing of the first differential member 21 and the second differential member 22 .

[0132] In one embodiment, if Figure 1 and Figure 2 As shown, the third differential gear 222 is meshed with the second ring gear 422 of the second primary reduction assembly 42 , thereby achieving meshing of the second differential member 22 with the second ring gear 422 of the second primary reduction assembly 42 .

[0133] The fourth differential gear 223 meshes with the second end of the first differential member 21 (the second differential gear 213 ), thereby meshing the first differential member 21 with the second differential member 22 .

[0134] The differential mechanism 2 is composed of a differential gear and a differential shaft. Compared with a traditional differential, the differential mechanism 2 is generally symmetrical in structure and can be used for both left and right turns.

[0135] In other embodiments not shown in the figures, the differential mechanism may also be a differential to achieve a differential function.

[0136] In one embodiment, if Figures 1 to 5 As shown, the drive axle also includes a first hub mechanism 5 and a second hub mechanism 6. The first hub mechanism 5 is transmission-connected to the first primary reduction assembly 32, and the second hub mechanism 6 is transmission-connected to the second primary reduction assembly 42 to realize the rotation of each hub mechanism.

[0137] In one embodiment, if Figures 1 to 5 As shown, in the width direction of the vehicle, the first hub mechanism 5 is located on the side of the first primary reduction assembly 32 facing away from the drive mechanism 1, and the second hub mechanism 6 is located on the side of the second primary reduction assembly 42 facing away from the drive mechanism 1. The first hub mechanism 5 and the second hub mechanism 6 are coaxially arranged, so that the drive axle has a symmetrical structure.

[0138] In one embodiment, if Figure 2 As shown, the first hub mechanism 5 includes a first planetary carrier 51 , which is connected to the axle of the first planetary gear 321 , and the first planetary carrier 51 is coaxially arranged with the first driven gear set 312 to drive the first planetary carrier 51 to rotate through the first planetary gear 321 .

[0139] The axis of the first output shaft 111 of the dual-axis motor 11 is not in the same straight line as the axis of the first planetary carrier 51, which is beneficial for arranging the mast for a forklift drive axle. Figures 2 to 4 As shown, a third bearing 8a is provided between the first gear ring 322 and the first planetary carrier 51, so as to reduce the friction between the first gear ring 322 and the first planetary carrier 51 and make the relative rotation between the first gear ring 322 and the first planetary carrier 51 smoother.

[0140] In one embodiment, if Figures 2 to 4As shown, a fifth bearing 9a is provided between the first sun gear 3122 and the first planetary carrier 51, thereby reducing the friction between the first driven gear set 312 and the first planetary carrier 51, and at the same time making the relative rotation between the first driven gear set 312 and the first planetary carrier 51 smoother.

[0141] In one embodiment, if Figure 2 As shown, the first driven gear set 312 also includes a second driven column 3124, which is coaxially connected to the first sun gear 3122, and the second driven column 3124 is located on the side of the first sun gear 3122 that is away from the first driven gear 3121, and the fifth bearing 9a is coaxially sleeved on the second driven column 3124 to realize the installation between the fifth bearing 9a and the first sun gear 3122.

[0142] In one embodiment, if Figures 2 to 4 As shown, the first hub mechanism 5 further includes a first hub inner bearing 52 and a first hub outer bearing 53, and the first hub inner bearing 52 and the first hub outer bearing 53 are respectively coaxially sleeved on the first planetary carrier 51. In the width direction of the vehicle, the first hub inner bearing 52 is located on the inner side of the first hub outer bearing 53, that is, the first hub inner bearing 52 is located on the side of the first hub outer bearing 53 close to the driving mechanism 1, that is, the first hub inner bearing 52 is located between the first hub outer bearing 53 and the first primary reduction assembly 32. The first hub inner bearing 52 and the first hub outer bearing 53 are used to cooperate with the first planetary carrier 51 to install the first hub between the first hub inner bearing 52 and the first hub outer bearing 53.

[0143] In one embodiment, if Figures 2 to 4 As shown, the first hub mechanism 5 further includes a first round nut 54, and the first round nut 54 is used to lock the first hub outer bearing 53 to prevent the first hub outer bearing 53 from falling off.

[0144] In one embodiment, if Figure 2 As shown, the second hub mechanism 6 includes a second planetary carrier 61 , which is connected to the axle of the second planetary gear 421 , and the second planetary carrier 61 is coaxially arranged with the second driven gear set 412 to drive the second planetary carrier 61 to rotate through the second planetary gear 421 .

[0145] The axis of the second output shaft 112 of the dual-shaft motor 11 is not in the same straight line as the axis of the second planetary carrier 61, which is beneficial for arranging the gantry for a forklift drive axle.

[0146] In one embodiment, if Figures 2 to 4 As shown, a fourth bearing 8b is provided between the second gear ring 422 and the second planetary carrier 61, so as to reduce the friction between the second gear ring 422 and the second planetary carrier 61 and make the relative rotation between the second gear ring 422 and the second planetary carrier 61 more stable.

[0147] In one embodiment, if Figures 2 to 4 As shown, a sixth bearing 9b is provided between the second sun gear 4122 and the second planetary carrier 61, thereby reducing the friction between the second driven gear set 412 and the second planetary carrier 61, and at the same time making the relative rotation between the second driven gear set 412 and the second planetary carrier 61 smoother.

[0148] In one embodiment, if Figure 2 As shown, the second driven gear set 412 also includes a fourth driven column 4124, which is coaxially connected to the second sun gear 4122, and the fourth driven column 4124 is located on the side of the second sun gear 4122 that is away from the second driven gear 4121, and the sixth bearing 9b is coaxially sleeved on the fourth driven column 4124 to realize the installation between the sixth bearing 9b and the second sun gear 4122.

[0149] In one embodiment, if Figures 2 to 4 As shown, the second hub mechanism 6 further includes a second hub inner bearing 62 and a second hub outer bearing 63, and the second hub inner bearing 62 and the second hub outer bearing 63 are respectively coaxially sleeved on the second planetary carrier 61. In the width direction of the vehicle, the second hub inner bearing 62 is located on the inner side of the second hub outer bearing 63, that is, the second hub inner bearing 62 is located on the side of the second hub outer bearing 63 close to the driving mechanism 1, that is, the second hub inner bearing 62 is located between the second hub outer bearing 63 and the second primary reduction assembly 42. The second hub inner bearing 62 and the second hub outer bearing 63 are used to cooperate with the second planetary carrier 61 to install the second hub between the second hub inner bearing 62 and the second hub outer bearing 63.

[0150] In one embodiment, if Figures 2 to 4 As shown, the second hub mechanism 6 further includes a second round nut 64, and the second round nut 64 is used to lock the second hub outer bearing 63 to prevent the second hub outer bearing 63 from falling off.

[0151] The working principle of the drive axle provided by the embodiment of the present invention is as follows:

[0152] The dual-axis motor 11 is working, and the first output shaft 111 of the dual-axis motor 11 is coaxially connected with the first driving gear set 311, so that the output speed of the dual-axis motor 11 is transmitted to the first secondary reduction assembly 31, and the first driving gear set 311 is meshed with the first driven wheel 3121 of the first driven gear set 312, so as to realize the primary reduction of the first reduction mechanism 3. Afterwards, the first sun gear 3122 of the first driven gear set 312 is meshed with the first planetary gear 321, so as to transmit the output speed of the first secondary reduction assembly 31 to the first primary reduction assembly 32, and at the same time, the meshing of the first sun gear 3122 and the first planetary gear 321 can realize the secondary reduction of the first reduction mechanism 3.

[0153] The second output shaft 112 of the dual-axis motor 11 is coaxially connected with the second driving gear set 411, so that the output speed of the dual-axis motor 11 is transmitted to the second secondary reduction assembly 41, and the second driving gear set 411 is meshed with the second driven wheel 4121 of the second driven gear set 412 to achieve the first-stage reduction of the second reduction mechanism 4. Afterwards, the second sun gear 4122 of the second driven gear set 412 is meshed with the second planetary gear 421 to transmit the output speed of the second secondary reduction assembly 41 to the second primary reduction assembly 42, and at the same time, the second sun gear 4122 is meshed with the second planetary gear 421 to achieve the second-stage reduction of the second reduction mechanism 4.

[0154] The first ring gear 322 meshes with the first planetary gear 321, so that the output speed of the first primary reduction assembly 32 is transmitted to the first ring gear 322. At the same time, since the first planetary carrier 51 is connected to the axle of the first planetary gear 321, the first planetary carrier 51 can be driven to rotate by the first planetary gear 321.

[0155] The second ring gear 422 meshes with the second planetary gear 421, so that the output speed of the second primary reduction assembly 42 is transmitted to the second ring gear 422. At the same time, since the second planetary carrier 61 is connected to the axle of the second planetary gear 421, the second planetary carrier 61 can be driven to rotate by the second planetary gear 421.

[0156] The first differential gear 212 of the first differential member 21 is meshed with the first ring gear 322, the third differential gear 222 of the second differential member 22 is meshed with the second ring gear 422, and the second differential gear 213 of the first differential member 21 is meshed with the fourth differential gear 223 of the second differential member 22, so that the first ring gear 322 and the second ring gear 422 are kept in a linkage state through the differential mechanism 2.

[0157] When the vehicle is traveling in a straight line (not turning), the first ring gear 322 rotates relative to the first planetary gear 321, and the second ring gear 422 rotates relative to the second planetary gear 421. At the same time, the first ring gear 322 and the second ring gear 422 are relatively locked via the differential mechanism 2. The power of the first output shaft 111 of the dual-axis motor 11 is output through the first secondary reduction assembly 31, the first primary reduction assembly 32 and the first planetary carrier 51. The power of the second output shaft 112 of the dual-axis motor 11 is output through the second secondary reduction assembly 41, the second primary reduction assembly 42 and the second planetary carrier 61.

[0158] When the vehicle turns, it is necessary to make the rotation speeds of the left and right wheels inconsistent. Figure 1 Taking the left and right directions as an example, the first reduction mechanism 3 and the first wheel hub mechanism 5 are on the left, and the second reduction mechanism 4 and the second wheel hub mechanism 6 are on the right. When the vehicle turns left, the left wheel of the vehicle slows down due to the resistance, and the right wheel needs to speed up. At this time, the left wheel speed is lower than the right wheel speed, and the left first gear ring 322 speed is lower than the right second gear ring 422 speed. When the vehicle turns right, the right wheel of the vehicle slows down due to the resistance, and the left wheel speed needs to speed up. At this time, the right wheel speed is lower than the left wheel speed, and the right second gear ring 422 speed is lower than the left first gear ring 322 speed. Since the first gear ring 322 and the second gear ring 422 on the left and right sides can rotate relatively, the first planetary gear 321 and the second planetary gear 421 on the left and right sides are differential, and then the first planetary carrier 51 and the second planetary carrier 61 on the left and right sides for outputting power have a differential speed, so that the left and right wheels have different speeds.

[0159] The power confluence mode of the differential mechanism 2 is as follows: when the vehicle turns left and the left wheel (first planetary carrier 51) is stuck due to steering, the power on the left side can be outputted sequentially through the first sun gear 3122, the first planetary gear 321 and the first ring gear 322 on the left side. Afterwards, the first ring gear 322 on the left side meshes with the first differential gear 212, and sequentially transmits the power to the second ring gear 422 on the right side through the first differential shaft 211, the second differential gear 213, the fourth differential gear 223, the second differential shaft 221 and the third differential gear 222, providing torque for the second ring gear 422 on the right side. At this time, the power of the second sun gear 4122 on the right side merges with the power provided by the second ring gear 422 on the right side, forming a torque confluence to the right wheel, thereby accelerating the right wheel speed.

[0160] When the vehicle turns right and the right wheel (second planetary carrier 61) is stuck due to steering, the power on the right side can be output sequentially through the second sun gear 4122, the second planetary gear 421 and the second ring gear 422 on the right side. Afterwards, the second ring gear 422 on the right side meshes with the third differential gear 222, and sequentially transmits power to the first ring gear 322 on the left side through the second differential shaft 221, the fourth differential gear 223, the second differential gear 213, the first differential shaft 211 and the first differential gear 212, providing torque for the first ring gear 322 on the left side. At this time, the power of the first sun gear 3122 on the left side merges with the power provided by the first ring gear 322 on the left side, forming a torque that merges on the left wheel, thereby accelerating the left wheel speed.

[0161] Embodiment 2

[0162] like Figure 6 As shown, a second drive axle is provided for an embodiment of the present invention. Different from the first embodiment, in the second embodiment, the first secondary reduction assembly 31 does not have a first driven gear set 312, that is, the first secondary reduction assembly 31 includes a first driving gear set 311, and the first driving gear set 311 is directly engaged with the first planetary gear 321 to realize power transmission between the first secondary reduction assembly 31 and the first primary reduction assembly 32.

[0163] The second two-stage reduction assembly 41 is not provided with a second driven gear set 412, that is, the second two-stage reduction assembly 41 includes a second driving gear set 411, and the second driving gear set 411 is directly meshed with the second planetary gear 421 to realize power transmission between the second two-stage reduction assembly 41 and the second one-stage reduction assembly 42.

[0164] Embodiment 3

[0165] like Figure 7 As shown, a third drive axle is provided for embodiment 3 of the present invention. Different from embodiment 2, in embodiment 3, the outer ring of the second gear ring segment 3222 of the first gear ring 322 is suitable for transmission connection with the first end of the first differential member 21, that is, the outer ring of the second gear ring segment 3222 can mesh with the first differential gear 212 to achieve transmission connection between the first gear ring 322 and the first end of the first differential member 21.

[0166] The outer ring of the fourth gear ring segment of the second gear ring 422 is suitable for driving connection with the first end of the second differential member 22, that is, the outer ring of the fourth gear ring segment can mesh with the third differential gear 222 to achieve driving connection between the second gear ring 422 and the first end of the second differential member 22.

[0167] Embodiment 4

[0168] The transmission structure provided in the fourth embodiment of the present invention includes a differential mechanism 2, a first reduction mechanism 3 and a second reduction mechanism 4, wherein the differential mechanism 2 includes a first differential part 21 and a second differential part 22, wherein the first end of the first differential part 21 is transmission-connected to the first reduction mechanism 3, and the first end of the second differential part 22 is transmission-connected to the second reduction mechanism 4.

[0169] The second end of the first differential member 21 is meshed with the second end of the second differential member 22 .

[0170] In the fourth embodiment, the specific structures of the first differential member 21 and the second differential member 22 are the same as those in the first embodiment, that is, the first differential member 21 includes a first differential shaft 211, a first differential gear 212 and a second differential gear 213, the first differential shaft 211 is connected between the first differential gear 212 and the second differential gear 213 to form the first differential member 21, the first differential gear 212 serves as the first end of the first differential member 21, and the second differential gear 213 serves as the second end of the first differential member 21.

[0171] The first differential gear 212 is transmission-connected to the first reduction mechanism 3 , and the second differential gear 213 is meshed with the second end of the second differential member 22 , thereby realizing the transmission connection between the first differential member 21 and the first reduction mechanism 3 , and the transmission connection between the first differential member 21 and the second differential member 22 .

[0172] The second differential member 22 includes a second differential shaft 221, a third differential gear 222 and a fourth differential gear 223. The second differential shaft 221 is connected between the third differential gear 222 and the fourth differential gear 223 to form the second differential member 22. The third differential gear 222 serves as the first end of the second differential member 22, and the fourth differential gear 223 serves as the second end of the second differential member 22.

[0173] The third differential gear 222 is transmission-connected to the second reduction mechanism 4 , and the fourth differential gear 223 is meshed with the second end of the first differential member 21 , thereby realizing the transmission connection between the second differential member 22 and the second reduction mechanism 4 , and the transmission connection between the second differential member 22 and the first differential member 21 .

[0174] Specifically, the second differential gear 213 is meshed with the fourth differential gear 223 to achieve a transmission connection between the second differential member 22 and the first differential member 21 , thereby achieving a differential function of the differential mechanism 2 .

[0175] Embodiment 5

[0176] The wheel drive system provided in the fifth embodiment of the present invention includes the drive axle provided in any one of the above-mentioned embodiments one to three, or includes the transmission structure provided in the above-mentioned embodiment four.

[0177] Embodiment 6

[0178] The vehicle provided in the sixth embodiment of the present invention includes the drive axle provided in any one of the first to third embodiments, or includes the transmission structure provided in the fourth embodiment, or includes the wheel drive system provided in the fifth embodiment.

[0179] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A drive axle, characterized in that: It comprises a driving mechanism (1), a differential mechanism (2), a first reduction mechanism (3) and a second reduction mechanism (4), wherein the first reduction mechanism (3) and the second reduction mechanism (4) are respectively connected in driving connection with the driving mechanism (1); The differential mechanism (2) comprises a first differential member (21) and a second differential member (22), wherein a first end of the first differential member (21) is drivingly connected to the first reduction mechanism (3), and a first end of the second differential member (22) is drivingly connected to the second reduction mechanism (4); The second end of the first differential member (21) is meshed with the second end of the second differential member (22).

2. The drive axle according to claim 1, characterized in that: The first differential member (21) comprises a first differential shaft (211), a first differential gear (212) and a second differential gear (213); the first differential shaft (211) is connected between the first differential gear (212) and the second differential gear (213); the first differential gear (212) is transmission-connected to the first reduction mechanism (3); and the second differential gear (213) is meshed with the second end of the second differential member (22).

3. The drive axle according to claim 2, characterized in that: The second differential member (22) comprises a second differential shaft (221), a third differential gear (222) and a fourth differential gear (223); the second differential shaft (221) is connected between the third differential gear (222) and the fourth differential gear (223); the third differential gear (222) is transmission-connected to the second reduction mechanism (4); and the fourth differential gear (223) is meshed with the second end of the first differential member (21).

4. The drive axle according to claim 3, characterized in that: The second differential gear (213) meshes with the fourth differential gear (223).

5. The drive axle according to claim 4, characterized in that: The driving mechanism (1) has a first output end and a second output end; The first reduction mechanism (3) comprises a first primary reduction assembly (32), the first primary reduction assembly (32) being drivingly connected between a first output end of the drive mechanism (1) and a first end of the first differential member (21); and / or, The second reduction mechanism (4) comprises a second primary reduction assembly (42), and the second primary reduction assembly (42) is drivingly connected between the second output end of the drive mechanism (1) and the first end of the second differential member (22).

6. The drive axle according to claim 5, characterized in that: The first primary reduction assembly (32) comprises a first planetary gear (321) and a first ring gear (322), the first planetary gear (321) being adapted to be drivingly connected to a first output end of the drive mechanism (1), the inner ring of the first ring gear (322) being meshed with the first planetary gear (321), and the outer ring of the first ring gear (322) being adapted to be drivingly connected to a first end of the first differential member (21); and / or, The second first-stage reduction assembly (42) comprises a second planetary gear (421) and a second ring gear (422), wherein the second planetary gear (421) is suitable for being transmission-connected to the second output end of the drive mechanism (1), the inner ring of the second ring gear (422) is meshed with the second planetary gear (421), and the outer ring of the second ring gear (422) is suitable for being transmission-connected to the first end of the second differential member (22).

7. The drive axle according to claim 6, characterized in that: The outer ring of the first gear ring (322) is meshed with the first differential gear (212), and the outer ring of the second gear ring (422) is meshed with the third differential gear (222).

8. The drive axle according to claim 6, characterized in that: The first gear ring (322) and the second gear ring (422) are coaxially arranged.

9. The drive axle according to claim 8, characterized in that: The first gear ring (322) comprises a first gear ring segment (3221), a second gear ring segment (3222) and a first connecting segment (3223) connected between the first gear ring segment (3221) and the second gear ring segment (3222), the inner ring of the first gear ring segment (3221) is meshed with the first planetary gear (321), and the outer ring of the first gear ring segment (3221) or the outer ring of the second gear ring segment (3222) is suitable for driving connection with the first end of the first differential member (21); and / or, The second gear ring (422) comprises a third gear ring segment, a fourth gear ring segment and a second connecting segment connected between the third gear ring segment and the fourth gear ring segment, the inner ring of the third gear ring segment is meshed with the second planetary gear (421), and the outer ring of the third gear ring segment or the outer ring of the fourth gear ring segment is suitable for transmission connection with the first end of the second differential member (22).

10. The drive axle according to claim 6, characterized in that: The first reduction mechanism (3) further comprises a first two-stage reduction assembly (31), the first two-stage reduction assembly (31) being transmission-connected between the first output end of the drive mechanism (1) and the first one-stage reduction assembly (32); and / or; The second reduction mechanism (4) further comprises a second two-stage reduction assembly (41), wherein the second two-stage reduction assembly (41) is transmission-connected between the second output end of the drive mechanism (1) and the second one-stage reduction assembly (42).

11. The drive axle according to claim 10, characterized in that: The first two-stage reduction assembly (31) comprises a first driving gear set (311) and a first driven gear set (312), the first output end of the driving mechanism (1) is transmission-connected to the first driving gear set (311), the first driven gear set (312) is transmission-connected to the first driving gear set (311), and the first driven gear set (312) is suitable for transmission-connected to the first one-stage reduction assembly (32); and / or, The second secondary reduction assembly (41) comprises a second driving gear set and a second driven gear set, the second output end of the drive mechanism (1) is transmission-connected to the second driving gear set, the second driven gear set is transmission-connected to the second driving gear set, and the second driven gear set is suitable for transmission-connected to the second primary reduction assembly (42).

12. The drive axle according to claim 11, characterized in that: The first driven gear set (312) comprises a first driven wheel (3121) and a first sun wheel (3122) coaxially connected to the first driven wheel (3121), the first driven wheel (3121) is suitable for being transmission-connected to the first driving gear set (311), and the first sun wheel (3122) is suitable for being transmission-connected to the first primary reduction assembly (32); and / or, The second driven gear set (412) comprises a second driven wheel (4121) and a second sun wheel (4122) coaxially connected to the second driven wheel (4121), the second driven wheel (4121) being suitable for transmission connection with the second driving gear set (411), and the second sun wheel (4122) being suitable for transmission connection with the second first-stage reduction assembly (42).

13. The drive axle according to claim 12, characterized in that: The first ring gear (322) is coaxially arranged with the first sun gear (3122); and / or, The second ring gear (422) is coaxially arranged with the second sun gear (4122).

14. The drive axle according to claim 12, characterized in that: In the width direction of the vehicle, the first sun gear (3122) and the first first-stage reduction assembly (32) are both located on the side of the first driven wheel (3121) facing away from the drive mechanism (1), and / or the second sun gear (4122) and the second first-stage reduction assembly (42) are both located on the side of the second driven wheel (4121) facing away from the drive mechanism (1).

15. The drive axle according to claim 12, characterized in that: The first two-stage reduction assembly (31) further comprises a first driven gear bearing (313), wherein the first driven gear bearing (313) is coaxially connected to the first driven gear set (312), and the first driven gear bearing (313) is used to support the first driven gear set (312); and / or, The second two-stage reduction assembly (41) further comprises a second driven gear bearing (413), wherein the second driven gear bearing (413) is coaxially connected to the second driven gear set (412), and the second driven gear bearing (413) is used to support the second driven gear set (412).

16. The drive axle according to claim 15, characterized in that: The first driven gear set (312) further comprises a first driven column (3123), the first driven column (3123) being coaxially connected to the first driven wheel (3121), and the first driven column (3123) being located on a side facing away from the first sun wheel (3122), and the first driven gear bearing (313) being coaxially sleeved on the first driven column (3123); and / or, The second driven gear set (412) also includes a third driven column (4123), which is coaxially connected to the second driven wheel (4121), and the third driven column (4123) is located on the side facing away from the second sun gear (4122), and the second driven gear bearing (413) is coaxially sleeved on the third driven column (4123).

17. The drive axle according to claim 10, characterized in that: The first two-stage reduction assembly (31) further comprises a first driving gear bearing (314), the first driving gear bearing (314) being coaxially connected to the first driving gear set (311), the first driving gear bearing (314) being used to support the first driving gear set (311); and / or, The second two-stage reduction assembly (41) further comprises a second driving gear bearing, the second driving gear bearing is coaxially connected to the second driving gear set, and the second driving gear bearing is used to support the second driving gear set.

18. The drive axle according to claim 17, characterized in that: The first driving gear set (311) comprises a first driving wheel (3111) and a first driving column (3112) coaxially connected to the first driving wheel (3111), the first output end of the driving mechanism (1) is coaxially connected to the first driving column (3112), the first driven gear set (312) is transmission-connected to the first driving wheel (3111), and the first driving gear bearing (314) is coaxially sleeved on the first driving column (3112); and / or, The second driving gear set (411) comprises a second driving wheel and a second driving column coaxially connected to the second driving wheel, the second output end of the driving mechanism (1) is coaxially connected to the second driving column, the second driven gear set (412) is transmission-connected to the second driving wheel, and the second driving gear bearing (414) is coaxially sleeved on the second driving column.

19. The drive axle according to claim 12, characterized in that: A first bearing (7a) is arranged between the first gear ring (322) and the first driven wheel (3121), and the first bearing (7a) is coaxially arranged with the first gear ring (322); and / or, A second bearing (7b) is arranged between the second gear ring (422) and the second driven wheel (4121), and the second bearing (7b) is coaxially arranged with the second gear ring (422).

20. The drive axle according to claim 5, characterized in that: The first output end and the second output end are coaxially arranged.

21. The drive axle according to claim 5, characterized in that: The drive mechanism (1) is located between the first reduction mechanism (3) and the second reduction mechanism (4) in the width direction of the vehicle.

22. The drive axle according to claim 5, characterized in that: The driving mechanism (1) comprises a dual-axis motor (11), the dual-axis motor (11) having a first output shaft (111) constituting the first output end and a second output shaft (112) constituting the second output end, the first output shaft (111) of the dual-axis motor (11) being transmission-connected to the first secondary reduction assembly (31), and the second output shaft (112) of the dual-axis motor (11) being transmission-connected to the second secondary reduction assembly (41).

23. The drive axle according to claim 5, characterized in that: The drive mechanism (1) comprises a first single-axis motor and a second single-axis motor, the first single-axis motor having a first output shaft constituting the first output end, the second single-axis motor having a second output shaft constituting the second output end, the first output shaft being transmission-connected to the first secondary reduction assembly (31), and the second output shaft being transmission-connected to the second secondary reduction assembly (41).

24. The drive axle according to claim 5, characterized in that: The driving mechanism (1) comprises a single-axis motor and an intermediate transition shaft, wherein the single-axis motor has a first output shaft constituting the first output end, the first output shaft is transmission-connected to the first secondary reduction assembly (31), and the first secondary reduction assembly (31) and the second secondary reduction assembly (41) are coaxially connected via the intermediate transition shaft.

25. The drive axle according to claim 12, characterized in that: The drive axle further comprises a first hub mechanism (5) and a second hub mechanism (6), wherein the first hub mechanism (5) is drivingly connected to the first primary reduction assembly (32), and the second hub mechanism (6) is drivingly connected to the second primary reduction assembly (42).

26. The drive axle according to claim 25, characterized in that: In the width direction of the vehicle, the first hub mechanism (5) is located on the side of the first primary reduction assembly (32) facing away from the drive mechanism (1), and the second hub mechanism (6) is located on the side of the second primary reduction assembly (42) facing away from the drive mechanism (1).

27. The drive axle according to claim 25, characterized in that: The first hub mechanism (5) comprises a first planet carrier (51), the first planet carrier (51) is connected to the axle of the first planetary gear (321), and the first planet carrier (51) is coaxially arranged with the first driven gear set (312); and / or, The second hub mechanism (6) comprises a second planet carrier (61), the second planet carrier (61) is connected to the axle of the second planetary gear (421), and the second planet carrier (61) is coaxially arranged with the second driven gear set (412).

28. The drive axle according to claim 27, characterized in that: A third bearing (8a) is arranged between the first ring gear (322) and the first planet carrier (51), and a fourth bearing (8b) is arranged between the second ring gear (422) and the second planet carrier (61).

29. The drive axle according to claim 27, characterized in that: A fifth bearing (9a) is arranged between the first sun gear (3122) and the first planet carrier (51), and a sixth bearing (9b) is arranged between the second sun gear (4122) and the second planet carrier (61).

30. The drive axle according to claim 29, characterized in that: The first driven gear set (312) further comprises a second driven column (3124), the second driven column (3124) being coaxially connected to the first sun gear (3122), and the second driven column (3124) being located on a side of the first sun gear (3122) facing away from the first driven gear (3121), and the fifth bearing (9a) being coaxially sleeved on the second driven column (3124); The second driven gear set (412) further includes a fourth driven column (4124), the fourth driven column (4124) being coaxially connected to the second sun gear (4122), and the fourth driven column (4124) being located on a side of the second sun gear (4122) facing away from the second driven gear (4121), and the sixth bearing (9b) being coaxially sleeved on the fourth driven column (4124).

31. The drive axle according to claim 27, characterized in that: The first wheel hub mechanism (5) further comprises a first wheel hub inner bearing (52) and a first wheel hub outer bearing (53), wherein the first wheel hub inner bearing (52) and the first wheel hub outer bearing (53) are coaxially sleeved on the first planet carrier (51); The second hub mechanism (6) further comprises a second hub inner bearing (62) and a second hub outer bearing (63); the second hub inner bearing (62) and the second hub outer bearing (63) are coaxially sleeved on the second planet carrier (61).

32. The drive axle according to claim 31, characterized in that: In the width direction of the vehicle, the first wheel hub inner bearing (52) is located between the first wheel hub outer bearing (53) and the first primary reduction assembly (32), and the second wheel hub inner bearing (62) is located between the second wheel hub outer bearing (63) and the second primary reduction assembly (42).

33. A transmission structure, characterized in that: The invention comprises a differential mechanism (2), a first reduction mechanism (3) and a second reduction mechanism (4), wherein the differential mechanism (2) comprises a first differential member (21) and a second differential member (22), wherein a first end of the first differential member (21) is drivingly connected to the first reduction mechanism (3), and a first end of the second differential member (22) is drivingly connected to the second reduction mechanism (4); The second end of the first differential member (21) is meshed with the second end of the second differential member (22).

34. The transmission structure according to claim 33, characterized in that: The first differential member (21) comprises a first differential shaft (211), a first differential gear (212) and a second differential gear (213); the first differential shaft (211) is connected between the first differential gear (212) and the second differential gear (213); the first differential gear (212) is transmission-connected to the first reduction mechanism (3); and the second differential gear (213) is meshed with the second end of the second differential member (22).

35. The transmission structure according to claim 34, characterized in that: The second differential member (22) comprises a second differential shaft (221), a third differential gear (222) and a fourth differential gear (223); the second differential shaft (221) is connected between the third differential gear (222) and the fourth differential gear (223); the third differential gear (222) is transmission-connected to the second reduction mechanism (4); and the fourth differential gear (223) is meshed with the second end of the first differential member (21).

36. The transmission structure according to claim 35, characterized in that: The second differential gear (213) meshes with the fourth differential gear (223).

37. A wheel drive system, characterized in that: A drive axle comprising any one of claims 1 to 32, or a transmission structure comprising any one of claims 33 to 36.

38. A vehicle, characterized in that: Includes the drive axle described in any one of claims 1-32, or includes the transmission structure described in any one of claims 33-36, or includes the wheel drive system described in claim 37.

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