Differential structure of reduction gearbox, reduction gearbox and vehicle

Abstract

The embodiment of the invention relates to a differential structure of a reduction gearbox, the reduction gearbox and a vehicle. The differential structure comprises a main gear, a differential mechanism, a first synchronizer, a connecting piece, a transmission assembly, a connecting shaft and a second synchronizer. The differential mechanism comprises a first shell, a first output shaft and a second output shaft, the first output shaft penetrates through the main gear, and the first shell is connected with the main gear; the first synchronizer is arranged on the first output shaft; the connecting piece is arranged on the second output shaft; the transmission assembly is in transmission connection with the connecting piece; the connecting shaft penetrates through the transmission assembly; the second synchronizer is arranged on the connecting shaft; the second synchronizer is connected with the connecting piece and separated from the transmission assembly, so that the second output shaft drives the connecting shaft to rotate in the same direction; the second synchronizer is connected with the transmission assembly and is separated from the connecting piece, so that the transmission assembly drives the connecting shaft to reversely rotate relative to the second output shaft. According to the differential structure, the functions of pivot steering, small-turning-radius driving and the like of the whole vehicle can be achieved, the structure is simple, and the cost is relatively low.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and in particular to a differential structure of a reduction gearbox, a reduction gearbox and a vehicle. Background Art

[0002] In order to realize functions such as turning the whole vehicle on the spot and driving with a small turning radius, reduce the demand for the site for the whole vehicle to turn around, and adapt to more extreme sites, vehicles in related technologies usually adopt a distributed four-electric drive system, which independently drives the front, rear, left and right wheels to form a steering torque around the center of mass of the whole vehicle, thereby realizing functions such as turning the whole vehicle on the spot and driving with a small turning radius.

[0003] See also Figure 1 Taking the vehicle turning in situ as an example, the distributed four-electric drive system has two left electric drive systems 3 and two right electric drive systems 4. The left electric drive system 3 of the front axle of the vehicle drives the left wheel 1 to reverse through the left drive shaft 2 (taking driving the vehicle forward as positive), and the right electric drive system 4 of the front axle of the vehicle drives the right wheel 6 to rotate forward through the right drive shaft 5. The left electric drive system 3 of the rear axle of the vehicle drives the left wheel 1 to reverse through the left drive shaft 2, and the right electric drive system 4 of the rear axle of the vehicle drives the right wheel 6 to rotate forward through the right drive shaft 5. The two left wheels 1 and the two right wheels 6 generate friction with the ground to form a comprehensive torque in the counterclockwise direction, thereby driving the whole vehicle to rotate counterclockwise around the center of mass. Similarly, changing the rotation direction of the two left wheels 1 and the two right wheels 6 (that is, the two left wheels 1 rotate forward and the two right wheels 6 reverse) can form a comprehensive torque in the clockwise direction, thereby driving the whole vehicle to rotate clockwise around the center of mass. Therefore, the above-mentioned driving method can realize the steering function of the whole vehicle in situ around the center of mass with different rotation directions. In addition, by changing the driving force of each left electric drive system 3 and each right electric drive system 4, different functions such as small turning radius driving of the whole vehicle and scorpion tail swinging can be realized.

[0004] However, since the distributed four-wheel drive system requires independent electric drive systems for each of the four wheels, the distributed four-wheel drive system has a complex structure, high cost, and is difficult to popularize in the market. Summary of the invention

[0005] In view of this, the embodiments of the present application hope to provide a differential structure, a reduction gearbox and a vehicle that can not only realize functions such as turning the whole vehicle on the spot and driving with a small turning radius, but also have a simple structure and relatively low cost.

[0006] To achieve the above object, the first embodiment of the present application provides a differential structure of a reduction gearbox, including:

[0007] Main gear;

[0008] A differential, the differential comprising a first housing and a first output shaft and a second output shaft disposed on opposite sides of the first housing, the first output shaft passing through the main gear, and the first housing being connected to the main gear;

[0009] a first synchronizer, the first synchronizer being arranged on the first output shaft to be connected to or separated from the main gear;

[0010] a connecting member, the connecting member being arranged on the second output shaft;

[0011] A transmission assembly, the transmission assembly being in transmission connection with the connecting member;

[0012] A connecting shaft, the connecting shaft being rotatably disposed through the transmission assembly;

[0013] A second synchronizer, the second synchronizer is arranged on the connecting shaft to be connected or separated from the connecting member, and connected or separated from the transmission assembly; the second synchronizer is connected to the connecting member and separated from the transmission assembly so that the second output shaft drives the connecting shaft to rotate in the same direction; the second synchronizer is connected to the transmission assembly and separated from the connecting member so that the transmission assembly drives the connecting shaft to rotate in the opposite direction relative to the second output shaft.

[0014] In one embodiment, the connecting member is a connecting gear sleeved on the second output shaft and meshing with the transmission assembly.

[0015] In one embodiment, the transmission assembly includes a first transmission part and a transmission gear, and the first transmission part is respectively meshed with the connecting gear and the transmission gear to drive the transmission gear to rotate in the opposite direction relative to the second output shaft during the rotation of the second output shaft; the connecting shaft is rotatably inserted into the transmission gear, and the second synchronizer is connected to or separated from the transmission gear.

[0016] In one embodiment, the first transmission part includes a first gear, a second gear, a third gear and a gear shaft, the first gear is meshed with the connecting gear, the gear shaft is respectively connected to the first gear and the second gear, and the third gear is respectively meshed with the second gear and the transmission gear.

[0017] In one embodiment, a portion of the connecting shaft is located between the second output shaft and the transmission gear, and the second synchronizer is arranged at a portion of the connecting shaft between the second output shaft and the transmission gear; the second synchronizer includes a first connecting portion toward the connecting gear and a second connecting portion toward the transmission gear, the first connecting portion is connected or disconnected from the connecting member, and the second connecting portion is connected or disconnected from the transmission gear.

[0018] In one embodiment, the differential structure has a first state in which the wheels rotate in the same direction and at the same speed. In the first state, the first synchronizer is connected to the main gear, the second synchronizer is connected to the connecting member, and is separated from the transmission assembly; and / or,

[0019] The differential structure has a second state for realizing the function of differential rotation of the wheels in the same direction, in which the first synchronizer is separated from the main gear, the second synchronizer is connected to the connecting member and separated from the transmission assembly; and / or,

[0020] The differential structure has a third state for realizing the function of the wheels rotating in opposite directions at the same speed. In the third state, the first synchronizer is connected to the main gear, and the second synchronizer is separated from the connecting member and connected to the transmission assembly; and / or,

[0021] The differential structure has a fourth state for realizing the function of reverse differential rotation of the wheels, in which the first synchronizer is separated from the main gear, the second synchronizer is separated from the connecting member and connected to the transmission assembly; and / or,

[0022] The differential structure has a fifth state for realizing the electric drive disconnection function. In the fifth state, the first synchronizer is separated from the main gear, and the second synchronizer is separated from the connecting member and the transmission assembly, respectively.

[0023] The second embodiment of the present application provides a differential structure of a reduction gearbox, comprising:

[0024] Main gear;

[0025] A differential, the differential comprising a first housing and a first output shaft and a second output shaft disposed on opposite sides of the first housing, the first output shaft passing through the main gear, and the first housing being connected to the main gear;

[0026] a first synchronizer, the first synchronizer being arranged on the first output shaft to be connected to or separated from the main gear;

[0027] A transmission assembly, the transmission assembly comprising a second housing and a second transmission part transmission-connected to the second housing, the second output shaft being connected to the second transmission part, and the second output shaft being rotated so that the second transmission part can drive the second housing to rotate around the rotation axis of the main gear;

[0028] a connecting shaft, the connecting shaft being arranged on a side of the second transmission part away from the second output shaft and connected to the second transmission part;

[0029] A locking assembly, the locking assembly comprising a first locking member and a second locking member, the first locking member being disposed on the second housing, the second locking member being disposed outside the second housing and lockingly matched with the first locking member;

[0030] A second synchronizer, the second synchronizer is arranged on the second output shaft to be connected or separated from the second housing; the second synchronizer is connected to the second housing, and the first locking member is separated from the second locking member, so that the transmission assembly drives the connecting shaft and the second output shaft to rotate in the same direction; the second synchronizer is separated from the second housing, and the first locking member is locked with the second locking member, so that the transmission assembly drives the connecting shaft to rotate in the opposite direction relative to the second output shaft.

[0031] In one embodiment, the second transmission portion includes two first bevel gears disposed at intervals and two second bevel gears disposed at intervals and both rotatably connected to the second housing, one of the two first bevel gears is connected to the second output shaft, the other of the two first bevel gears is connected to the connecting shaft, and the two second bevel gears are meshed with the two second bevel gears.

[0032] In one embodiment, one of the first locking member and the second locking member is a clutch.

[0033] In one embodiment, there are multiple first locking members, and the multiple first locking members are arranged at intervals along the circumference of the second shell, and the second locking members correspond to the first locking members one by one.

[0034] In one embodiment, the differential structure has a first state for realizing the function of the wheels rotating in the same direction and at the same speed. In the first state, the first synchronizer is connected to the main gear, the second synchronizer is connected to the second housing, and the first locking member is in an unlocked state separated from the second locking member; and / or,

[0035] The differential structure has a second state for realizing the function of differential rotation of the wheels in the same direction, in which the first synchronizer is separated from the main gear, the second synchronizer is connected to the second housing, and the first locking member is in an unlocked state separated from the second locking member; and / or,

[0036] The differential structure has a third state for realizing the function of the wheels rotating in opposite directions at the same speed. In the third state, the first synchronizer is connected to the main gear, the second synchronizer is separated from the second housing, and the first locking member is in a locked state with the second locking member; and / or,

[0037] The differential structure has a fourth state for realizing a function of reverse differential rotation of the wheels, in which the first synchronizer is separated from the main gear, the second synchronizer is separated from the second housing, and the first locking member is in a locked state with the second locking member; and / or,

[0038] The differential structure has a fifth state for realizing the electric drive disconnection function. In the fifth state, the first synchronizer is separated from the main gear, the second synchronizer is separated from the second housing, and the first locking member is in an unlocked state separated from the second locking member.

[0039] In one embodiment, the differential includes a first output gear, a second output gear and two planetary gears, the first output gear is connected to the first output shaft, the second output gear is connected to the second output shaft, and the two planetary gears are both rotatably connected to the first housing and are meshed with the first output gear and the second output gear.

[0040] In one embodiment, the differential structure further includes two bearings, and the two bearings are respectively sleeved on the first output shaft and the second output shaft.

[0041] The third embodiment of the present application provides a reduction gearbox, comprising the differential structure described above.

[0042] In one embodiment, the reduction gearbox comprises an input gear meshing with the main gear.

[0043] The fourth embodiment of the present application provides a vehicle, including a first drive shaft, a second drive shaft, a first wheel, a second wheel, an electric drive module and the above-mentioned reduction gearbox, wherein the first drive shaft is respectively connected to the first output shaft and the first wheel, the second drive shaft is respectively connected to the connecting shaft and the second wheel, and the electric drive module is used to provide driving force for the rotation of the main gear.

[0044] The embodiment of the present application provides a differential structure of a reduction gearbox, a reduction gearbox and a vehicle. The differential structure can change the rotation direction of the connecting shaft driven by the transmission assembly by setting a first synchronizer, a second synchronizer, a connecting piece, a transmission assembly and a connecting shaft, or by setting a first synchronizer, a second synchronizer, a transmission assembly, a locking assembly and a connecting shaft, so that the rotation direction of the connecting shaft is opposite to the rotation direction of the first output shaft of the differential, so that the rotation directions of the first wheel driven by the first output shaft and the second wheel driven by the connecting shaft are opposite, thereby enabling the vehicle to achieve functions such as turning in place and driving with a small turning radius. The differential structure of the embodiment of the present application is simple in structure, relatively low in cost, has little impact on the original structure of the vehicle, and is easy to implement. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 It is a structural schematic diagram of a vehicle using a distributed four-electric drive system in the related art, and the arrow in the figure represents the comprehensive torque in the counterclockwise direction;

[0046] Figure 2 A partial structural schematic diagram of a first vehicle according to an embodiment of the present application;

[0047] Figure 3 for Figure 2 The schematic diagram of the structure of the reduction gearbox shown in the figure, the differential structure in the figure is in the first state;

[0048] Figure 4 for Figure 2 The schematic diagram of the structure of the reduction gearbox shown in the figure, the differential structure in the figure is in the second state;

[0049] Figure 5 for Figure 2 The schematic diagram of the structure of the reduction gearbox shown in the figure shows that the differential structure is in the third state;

[0050] Figure 6 for Figure 2 The schematic diagram of the structure of the reduction gearbox shown in the figure, the differential structure in the figure is in the fourth state;

[0051] Figure 7 for Figure 2 The schematic diagram of the structure of the reduction gearbox shown in the figure, the differential structure in the figure is in the fifth state;

[0052] Figure 8 A partial structural schematic diagram of a second vehicle according to an embodiment of the present application;

[0053] Fig. 9 for Figure 8 The schematic diagram of the structure of the reduction gearbox shown in the figure, the differential structure in the figure is in the first state;

[0054] Fig.10 for Figure 8 The schematic diagram of the structure of the reduction gearbox shown in the figure, the differential structure in the figure is in the second state;

[0055] Fig.11 for Figure 8 The schematic diagram of the structure of the reduction gearbox shown in the figure shows that the differential structure is in the third state;

[0056] Fig.12 for Figure 8 The schematic diagram of the structure of the reduction gearbox shown in the figure, the differential structure in the figure is in the fourth state;

[0057] Fig.13 for Figure 8The structural schematic diagram of the reduction gearbox shown in the figure shows that the differential structure is in the fifth state.

[0058] Description of Reference Numerals

[0059] 10. reduction box; 11. differential structure; 111. main gear; 112. differential; 1121. first housing; 1122. first output shaft; 1123. second output shaft; 1124. first output gear; 1125. second output gear; 1126. planetary gear; 113. first synchronizer; 114. connecting member; 115. transmission assembly; 1151. first transmission part; 11511. first gear; 11512. second gear; 11513. third gear; 11514. gear shaft; 1152. transmission gear; 1153. second housing ;1154, second transmission unit;11541, first bevel gear;11542, second bevel gear;116, connecting shaft;117, second synchronizer;1171, first connecting part;1172, second connecting part;118, locking assembly;1181, first locking member;1182, second locking member;119, bearing;12, input gear;20, first drive shaft;30, second drive shaft;40, first wheel;50, second wheel;1, left wheel;2, left drive shaft;3, left electric drive system;4, right electric drive system;5, right drive shaft;6, right wheel. DETAILED DESCRIPTION

[0060] The present application embodiment provides a vehicle, see Figure 2 and Figure 8 The vehicle includes a reduction gearbox 10, a first drive shaft 20, a second drive shaft 30, a first wheel 40, a second wheel 50 and an electric drive module (not shown).

[0061] The reduction gearbox 10 includes a differential structure 11, see Figure 2 The first differential structure 11 of the embodiment of the present application includes a main gear 111, a differential 112, a first synchronizer 113, a connecting member 114, a transmission assembly 115, a connecting shaft 116 and a second synchronizer 117.

[0062] The differential 112 includes a first housing 1121, a first output shaft 1122, and a second output shaft 1123, wherein the first output shaft 1122 and the second output shaft 1123 are disposed on opposite sides of the first housing 1121. The first output shaft 1122 passes through the main gear 111, and the first housing 1121 is connected to the main gear 111. The first housing 1121 may be directly connected to the main gear 111, or the first housing 1121 and the main gear 111 may be connected via an intermediate connecting member, for example, the first housing 1121 and the main gear 111 may be connected via a synchronizer.

[0063] The first output shaft 1122 and the second output shaft 1123 can rotate relative to the first housing 1121 , and the first housing 1121 can also drive the first output shaft 1122 and the second output shaft 1123 to rotate together.

[0064] Since the first output shaft 1122 passes through the main gear 111 and the first housing 1121 is connected to the main gear 111 , the first output shaft 1122 , the second output shaft 1123 and the first housing 1121 can all rotate around the rotation axis of the main gear 111 .

[0065] The specific structure of the differential 112 is not limited. For example, please refer to Figure 3 The differential 112 may include a first output gear 1124, a second output gear 1125 and two planetary gears 1126. The first output gear 1124 is connected to the first output shaft 1122, the second output gear 1125 is connected to the second output shaft 1123, and the two planetary gears 1126 are both rotatably connected to the first housing 1121 and are meshed with the first output gear 1124 and the second output gear 1125.

[0066] Specifically, the first output gear 1124 and the second output gear 1125 rotate coaxially, and each planetary gear 1126 can rotate around its own rotation axis or revolve around the rotation axis of the first output gear 1124 and the second output gear 1125. Each planetary gear 1126 meshes with the first output gear 1124 and the second output gear 1125, so that the first output shaft 1122 and the second output shaft 1123 can rotate relative to the first housing 1121, and the first housing 1121 can rotate together with the first output shaft 1122 and the second output shaft 1123.

[0067] See also Figure 2 In order to improve the rotation stability of the first output shaft 1122 and the second output shaft 1123, the differential structure 11 can also be provided with two bearings 119, and the two bearings 119 are respectively sleeved on the first output shaft 1122 and the second output shaft 1123, that is, the first output shaft 1122 is inserted into one of the bearings 119, and the second output shaft 1123 is inserted into the other bearing 119.

[0068] In other embodiments, the bearing 119 may not be provided.

[0069] Please continue reading Figure 2 and Figure 3 The first synchronizer 113 is disposed on the first output shaft 1122 to be connected to or separated from the main gear 111 , that is, the first synchronizer 113 can be connected to or separated from the main gear 111 .

[0070] The first synchronizer 113 is connected to the main gear 111 , so that the main gear 111 can drive the first output shaft 1122 to rotate together with the first synchronizer 113 during the rotation of the main gear 111 .

[0071] See also Figure 2 , Figure 3 and Figure 5 The connecting member 114 is disposed on the second output shaft 1123, the transmission assembly 115 is in transmission connection with the connecting member 114, and the connecting shaft 116 is rotatably disposed through the transmission assembly 115. The second synchronizer 117 is disposed on the connecting shaft 116 to be connected to or separated from the connecting member 114, and to be connected to or separated from the transmission assembly 115, that is, the second synchronizer 117 can be connected to or separated from the connecting member 114, and in addition, the second synchronizer 117 can be connected to or separated from the transmission assembly 115.

[0072] See also Figure 3 and Figure 4 The second synchronizer 117 is connected to the connecting member 114 and separated from the transmission assembly 115, so that the second output shaft 1123 drives the connecting shaft 116 to rotate in the same direction. Figure 5 and Figure 6 The second synchronizer 117 is connected to the transmission assembly 115 and separated from the connecting member 114, so that the transmission assembly 115 drives the connecting shaft 116 to rotate in the opposite direction relative to the second output shaft 1123. That is to say, the second output shaft 1123 rotates, so that the transmission assembly 115 connected to the connecting member 114 drives the connecting shaft 116 to rotate in the opposite direction relative to the second output shaft 1123.

[0073] The structural form of the connecting member 114 and the transmission assembly 115 is not limited, as long as the transmission assembly 115 can drive the connecting shaft 116 to rotate in the opposite direction relative to the second output shaft 1123. For example, please refer to Figure 3 The connecting member 114 may be a connecting gear sleeved on the second output shaft 1123 and meshed with the transmission assembly 115. In other words, the connecting member 114 may be meshed with the transmission assembly 115 to achieve transmission connection with the transmission assembly 115.

[0074] For example, see Figure 5The transmission assembly 115 may include a first transmission part 1151 and a transmission gear 1152. The first transmission part 1151 is meshed with the connecting gear and the transmission gear 1152 respectively, so as to drive the transmission gear 1152 to rotate in the opposite direction relative to the second output shaft 1123 during the rotation of the second output shaft 1123. The connecting shaft 116 is rotatably arranged through the transmission gear 1152, and the second synchronizer 117 is connected to or separated from the transmission gear 1152. That is, when the second synchronizer 117 is connected to the transmission gear 1152, the transmission gear 1152 rotates in the opposite direction relative to the second output shaft 1123 to drive the connecting shaft 116 to rotate in the same direction, so that the connecting shaft 116 can rotate in the opposite direction relative to the second output shaft 1123.

[0075] See also Figure 3 In order to facilitate the second synchronizer 117 to be connected to or separated from the connecting gear and connected to or separated from the transmission gear 1152, a portion of the connecting shaft 116 may be located between the second output shaft 1123 and the transmission gear 1152, and the second synchronizer 117 is disposed at a portion of the connecting shaft 116 located between the second output shaft 1123 and the transmission gear 1152. The second synchronizer 117 includes a first connecting portion 1171 facing the connecting gear and a second connecting portion 1172 facing the transmission gear 1152, the first connecting portion 1171 is connected to or separated from the connecting member 114, and the second connecting portion 1172 is connected to or separated from the transmission gear 1152.

[0076] See also Figure 5 The first transmission part 1151 may include a first gear 11511, a second gear 11512, a third gear 11513 and a gear shaft 11514, the first gear 11511 is meshed with the connecting gear, the gear shaft 11514 is respectively connected to the first gear 11511 and the second gear 11512, and the third gear 11513 is respectively meshed with the second gear 11512 and the transmission gear 1152.

[0077] Specifically, during the rotation of the second output shaft 1123, the connecting gear rotates in the same direction with the second output shaft 1123. Since the first gear 11511 is meshed with the connecting gear, and the gear shaft 11514 is respectively connected to the first gear 11511 and the second gear 11512, the first gear 11511 and the second gear 11512 can rotate in the same direction, and the rotation direction of the first gear 11511 and the second gear 11512 is opposite to the rotation direction of the connecting gear, which is equivalent to the rotation direction of the first gear 11511 and the second gear 11512 being opposite to the rotation direction of the second output shaft 1123. Since the third gear 11513 is respectively meshed with the second gear 11512 and the transmission gear 1152, the rotation direction of the third gear 11513 is not only opposite to the rotation direction of the first gear 11511 and the second gear 11512, but also opposite to the rotation direction of the transmission gear 1152. In other words, the rotation direction of the transmission gear 1152 is actually the same as the rotation direction of the first gear 11511 and the second gear 11512. Therefore, the transmission gear 1152 can rotate in the opposite direction relative to the second output shaft 1123.

[0078] It should be noted that the first transmission part 1151 is not limited to the structural form described in the above embodiments. In other embodiments, the first transmission part 1151 can also adopt any other structural form that can enable the transmission gear 1152 to rotate in the opposite direction relative to the second output shaft 1123. These structural forms include but are not limited to a combination of multiple gears, a combination of a gear and a rack, etc.

[0079] The first output shaft 1122 of the differential 112 generally rotates in the same direction as the second output shaft 1123. When the second synchronizer 117 is connected to the connecting member 114 and separated from the transmission assembly 115, the second output shaft 1123 can drive the connecting shaft 116 to rotate in the same direction by rotating, so that the connecting shaft 116 can also rotate in the same direction as the first output shaft 1122. When the second synchronizer 117 is connected to the transmission assembly 115 and separated from the connecting member 114, the second output shaft 1123 can drive the transmission assembly 115 to drive the connecting shaft 116 to rotate, and since the purpose of the transmission assembly 115 driving the connecting shaft 116 to rotate is to change the rotation direction of the connecting shaft 116, so that the rotation direction of the connecting shaft 116 is opposite to the rotation direction of the second output shaft 1123, therefore, after the connecting shaft 116 changes its rotation direction under the drive of the transmission assembly 115, the rotation direction of the connecting shaft 116 is actually opposite to the rotation direction of the first output shaft 1122.

[0080] Please continue reading Figure 2The first drive shaft 20 is connected to the first output shaft 1122 and the first wheel 40 respectively, the second drive shaft 30 is connected to the connecting shaft 116 and the second wheel 50 respectively, and the electric drive module is used to provide driving force for the rotation of the main gear 111.

[0081] For example, see Figure 2 The reduction gear 10 may be provided with an input gear 12 , and the input gear 12 is meshed with the main gear 111 . The electric drive module may drive the input gear 12 to rotate, so that the input gear 12 drives the main gear 111 to rotate.

[0082] In other embodiments, other transmission structures may be provided between the electric drive module and the main gear 111. The electric drive module drives the transmission structure to move, so that the transmission structure drives the main gear 111 to rotate. Alternatively, the electric drive module may directly drive the main gear 111 to rotate.

[0083] The electric drive module can rotate the first output shaft 1122 and the second output shaft 1123 by driving the main gear 111 to rotate, so that the first drive shaft 20 connected to the first output shaft 1122 drives the first wheel 40 to rotate, and the connecting shaft 116 connected to the second output shaft 1123 drives the second wheel 50 to rotate. When the connecting shaft 116 rotates in the same direction as the first output shaft 1122, the first wheel 40 and the second wheel 50 rotate in the same direction. When the connecting shaft 116 rotates in the opposite direction relative to the first output shaft 1122, the second wheel 50 also rotates in the opposite direction relative to the first wheel 40. In other words, the ultimate purpose of the electric drive module providing driving force for the rotation of the main gear 111 is to drive the first wheel 40 and the second wheel 50 to rotate.

[0084] The vehicle described in the embodiment of the present application can be a single-drive vehicle with only one electric drive module, or a multi-drive vehicle with multiple electric drive modules, for example, a dual-drive vehicle with two electric drive modules.

[0085] Taking a dual-drive vehicle with two first wheels 40 and two second wheels 50 as an example, one of the electric drive modules of the dual-drive vehicle is used to drive one first wheel 40 and one second wheel 50 to rotate, and the other electric drive module is used to drive another first wheel 40 and another second wheel 50 to rotate. For a dual-drive vehicle, two differential structures 11 may also be provided (the reduction box 10 may be two or one, that is, two reduction boxes 10 may each have a differential structure 11, or the same reduction box 10 may have two differential structures 11), and the electric drive module, the first drive shaft 20, the second drive shaft 30, the first wheel 40, and the second wheel 50 correspond to the differential structure 11 one by one.

[0086] By controlling the connection or separation of the first synchronizer 113 and the second synchronizer 117 of the differential structure 11 , the first wheel 40 and the second wheel 50 can realize various functions.

[0087] For example, see Figure 3 The differential structure 11 has a first state in which the wheels rotate in the same direction and at the same speed. In the first state, the first synchronizer 113 is connected to the main gear 111 , the second synchronizer 117 is connected to the connecting member 114 , and is separated from the transmission assembly 115 .

[0088] The function of the wheels rotating in the same direction and at the same speed means that the first wheel 40 and the second wheel 50 rotate in the same direction and at the same speed, which can ensure that the vehicle can travel smoothly.

[0089] by Figure 3 Taking the reduction gearbox 10 shown as an example, when the differential structure 11 is in the first state, the electric drive module drives the input gear 12 to rotate, and the input gear 12 drives the main gear 111 to rotate. Since the first synchronizer 113 is connected to the main gear 111, the first synchronizer 113, the first output shaft 1122, the first output gear 1124, the first housing 1121, the second output gear 1125, and the second output shaft 1123 all rotate in the same direction and at the same speed around the rotation axis of the main gear 111. Since the second synchronizer 117 is connected to the connecting member 114 and separated from the transmission assembly 115, the connecting shaft 116 can achieve the same direction and speed rotation as the first output shaft 1122 by rotating in the same direction and at the same speed as the second output shaft 1123. Therefore, the first wheel 40 and the second wheel 50 can also rotate in the same direction and at the same speed.

[0090] For example, see Figure 4 The differential structure 11 has a second state for realizing the function of differential rotation of the wheels in the same direction. In the second state, the first synchronizer 113 is separated from the main gear 111, and the second synchronizer 117 is connected to the connecting member 114 and separated from the transmission assembly 115.

[0091] The function of the wheel co-directional differential rotation means that the first wheel 40 and the second wheel 50 rotate in the same direction but at different speeds. The wheel co-directional differential rotation can make the outer wheel rotate faster than the inner wheel during the vehicle turning process to adapt to the radius change during the turn, thereby providing better controllability and safety.

[0092] by Figure 4Taking the reduction gearbox 10 shown as an example, when the differential structure 11 is in the second state, the electric drive module drives the input gear 12 to rotate, and the input gear 12 drives the main gear 111 to rotate. The main gear 111 drives the planetary gear 1126 to rotate around the rotation axis of the main gear 111 through the first housing 1121, so that the first output gear 1124, the second output gear 1125, the first output shaft 1122 and the second output shaft 1123 can also rotate in the same direction around the rotation axis of the main gear 111. Since the first synchronizer 113 is separated from the main gear 111, the second synchronizer 117 is connected to the connecting member 114 and separated from the transmission assembly 115, the first wheel 40 and the first output shaft 1122 rotate in the same direction and at the same speed, and the connecting shaft 116, the second synchronizer 117, and the second output shaft 1123 are combined into one and rotate in the same direction and at the same speed. Since the first synchronizer 113 is separated from the main gear 111, the planetary gear 1126 can realize the first output shaft 1122 and the second output shaft 1123 to rotate in the same direction at a differential speed by self-rotation. Therefore, the first output shaft 1122 also rotates in the same direction at a differential speed with the connecting shaft 116, thereby enabling the first wheel 40 and the second wheel 50 to rotate in the same direction at a differential speed.

[0093] For example, see Figure 5 The differential structure 11 has a third state for realizing the function of the wheels rotating in opposite directions at the same speed. In the third state, the first synchronizer 113 is connected to the main gear 111, and the second synchronizer 117 is separated from the connecting member 114 and connected to the transmission assembly 115.

[0094] The function of the wheels rotating in opposite directions at the same speed means that the first wheel 40 and the second wheel 50 rotate in opposite directions and rotate at approximately the same speed. The wheels rotating in opposite directions at the same speed can cause the vehicle to form a steering torque around the center of mass of the vehicle, thereby enabling the vehicle to achieve functions such as turning in place and driving with a small turning radius, wherein the small turning radius means that the turning radius of the vehicle is smaller than the turning radius when the first wheel 40 and the second wheel 50 rotate in the same direction at a differential speed.

[0095] by Figure 5Taking the reduction gearbox 10 shown as an example, when the differential structure 11 is in the third state, the electric drive module drives the input gear 12 to rotate, and the input gear 12 drives the main gear 111 to rotate. Since the first synchronizer 113 is connected to the main gear 111, the first synchronizer 113, the first output shaft 1122, the first output gear 1124, the first housing 1121, the second output gear 1125, and the second output shaft 1123 all rotate in the same direction and at the same speed around the rotation axis of the main gear 111. Since the second synchronizer 117 is separated from the connecting member 114 and connected to the transmission assembly 115, the connecting shaft 116 can rotate in the opposite direction and at the same speed relative to the second output shaft 1123 under the drive of the transmission assembly 115. Therefore, the connecting shaft 116 that rotates in the opposite direction and at the same speed relative to the second output shaft 1123 is actually also rotating in the opposite direction and at the same speed with the first output shaft 1122, thereby allowing the first wheel 40 and the second wheel 50 to rotate in the opposite direction and at the same speed.

[0096] For example, see Figure 6 The differential structure 11 has a fourth state for realizing the function of reverse differential rotation of the wheels. In the fourth state, the first synchronizer 113 is separated from the main gear 111, the second synchronizer 117 is separated from the connecting member 114, and is connected to the transmission assembly 115.

[0097] The wheel reverse differential rotation function means that the first wheel 40 and the second wheel 50 rotate in opposite directions and at different speeds. The wheel reverse differential rotation can also enable the vehicle to form a steering torque around the center of mass of the vehicle. However, since the first wheel 40 and the second wheel 50 rotate at different speeds, the wheel reverse differential rotation can increase the maneuverability of the vehicle, allowing the first wheel 40 and the second wheel 50 to achieve more functions, thereby adapting to more driving scenarios.

[0098] by Figure 6Taking the reduction gearbox 10 shown as an example, when the differential structure 11 is in the fourth state, the electric drive module drives the input gear 12 to rotate, the input gear 12 drives the main gear 111 to rotate, and the input gear 12 drives the main gear 111 to rotate. The main gear 111 drives the planetary gear 1126 to rotate around the rotation axis of the main gear 111 through the first housing 1121, so that the first output gear 1124, the second output gear 1125, the first output shaft 1122 and the second output shaft 1123 can also rotate in the same direction around the rotation axis of the main gear 111. Since the first synchronizer 113 is separated from the main gear 111, the second synchronizer 117 is separated from the connecting member 114 and connected to the transmission assembly 115, the first wheel 40 and the first output shaft 1122 rotate in the same direction and at the same speed, and the connecting shaft 116 rotates in the opposite direction and at the same speed relative to the second output shaft 1123 driven by the transmission assembly 115. Since the first synchronizer 113 is separated from the main gear 111, the planetary gear 1126 can realize the same direction differential rotation of the first output shaft 1122 and the second output shaft 1123 through self-rotation. Therefore, the connecting shaft 116 rotating in the opposite direction and at the same speed relative to the second output shaft 1123 actually also rotates in the opposite direction differentially with the first output shaft 1122, thereby allowing the first wheel 40 and the second wheel 50 to rotate in the opposite direction differentially.

[0099] For example, see Figure 7 The differential structure 11 has a fifth state for realizing the electric drive disconnection function. In the fifth state, the first synchronizer 113 is separated from the main gear 111, and the second synchronizer 117 is separated from the connecting member 114 and the transmission assembly 115 respectively.

[0100] The electric drive disconnection function refers to the function of disconnecting the electric drive module from the wheel end (i.e., the first wheel 40 and the second wheel 50). Specifically, the first wheel 40 and the second wheel 50 rotate under the action of the driving force provided by the electric drive module. However, if the electric drive module is always in driving connection with the first wheel 40 and the second wheel 50, then when the electric drive module is in a non-working state of stopping operation, once the first wheel 40 and the second wheel 50 rotate due to special circumstances, the electric drive module will be driven to rotate in the opposite direction to generate electric energy (equivalent to the electric drive module generating electricity), thereby causing the electric drive module to generate reverse drag energy loss. After the electric drive module is disconnected from the wheel end, when the electric drive module is in a non-working state of stopping operation, the electric drive module will disconnect the driving connection with the first wheel 40 and the second wheel 50. Even if the first wheel 40 and the second wheel 50 rotate due to special circumstances, the electric drive module will not be driven to rotate in the opposite direction, thereby effectively eliminating the reverse drag energy loss.

[0101] by Figure 7Taking the reduction box 10 shown in the figure as an example, when the differential structure 11 is in the fifth state, the electric drive module is in a non-working state of stopping operation. Since the first synchronizer 113 is separated from the main gear 111, if the first wheel 40 and the second wheel 50 rotate, the first wheel 40 drives the planetary gear 1126 to rotate through the first output shaft 1122 and the first output gear 1124, and then drives the transmission assembly 115 to move through the second output gear 1125, the second output shaft 1123 and the connecting member 114. Since the second synchronizer 117 is separated from the connecting member 114 and the transmission assembly 115 respectively, there is no power transmission between the transmission assembly 115 and the connecting shaft 116. For example, for Figure 7 The transmission gear 1152 shown is equivalent to being idling on the connecting shaft 116. The transmission gear 1152 is actually idling, and the power of the rotation of the first wheel 40 and the second wheel 50 cannot be transmitted to the electric drive module through the differential 112, thereby achieving the disconnection of the electric drive module and the wheel end.

[0102] The reduction gearbox in the related art can generally only realize the same direction and same speed rotation and the same direction differential rotation of the wheels, while the first differential structure 11 adopted by the reduction gearbox 10 of the embodiment of the present application can change the rotation direction of the connecting shaft 116 under the drive of the transmission assembly 115 by setting the first synchronizer 113, the second synchronizer 117, the connecting member 114, the transmission assembly 115 and the connecting shaft 116, so that the rotation direction of the connecting shaft 116 is opposite to the rotation direction of the first output shaft 1122 of the differential 112, so that the first wheel 40 driven by the first output shaft 1122 and the second wheel 50 driven by the connecting shaft 116 can be opposite in rotation direction, and the first wheel 40 and the second wheel 50 have opposite rotation directions, so that the vehicle can form a steering torque around the center of mass of the whole vehicle, thereby enabling the vehicle to realize the functions of turning in place and driving with a small turning radius. The differential structure 11 has a simple structure, relatively low cost, little impact on the original structure of the vehicle, and good feasibility.

[0103] In addition, the reduction gearbox in the related art is also unable to achieve the disconnection of the electric drive module from the wheel end, while the first differential structure 11 of the present application can also achieve the function of disconnecting the electric drive module from the wheel end, thereby eliminating the reverse drag energy loss of the electric drive module and improving power economy.

[0104] See also Figure 8 and Fig. 9 The second differential structure 11 of the reduction gearbox 10 of the embodiment of the present application includes a main gear 111, a differential 112, a first synchronizer 113, a transmission assembly 115, a connecting shaft 116, a locking assembly 118 and a second synchronizer 117.

[0105] The differential 112 includes a first housing 1121 and a first output shaft 1122 and a second output shaft 1123 disposed on opposite sides of the first housing 1121. The first output shaft 1122 passes through the main gear 111, and the first housing 1121 is connected to the main gear 111. The first synchronizer 113 is disposed on the first output shaft 1122 to connect with or disconnect from the main gear 111.

[0106] For this differential structure 11 , the first drive shaft 20 is still connected to the first output shaft 1122 and the first wheel 40 respectively, the second drive shaft 30 is connected to the connecting shaft 116 and the second wheel 50 respectively, and the electric drive module is used to provide driving force for the rotation of the main gear 111 .

[0107] In this embodiment, the differences between the second differential structure 11 of the differential 112 and the first differential structure 11 described in the previous embodiment are mainly introduced. The second differential structure 11 and the first differential structure 11 have the same name but components without detailed description. The second differential structure 11 can adopt the same or similar structure as the components in the first differential structure 11, which will not be repeated here.

[0108] See also Fig. 9 The transmission assembly 115 includes a second housing 1153 and a second transmission part 1154 transmission-connected to the second housing 1153. The second output shaft 1123 is connected to the second transmission part 1154. The second output shaft 1123 rotates to enable the second transmission part 1154 to drive the second housing 1153 to rotate around the rotation axis of the main gear 111. The connecting shaft 116 is disposed on a side of the second transmission part 1154 away from the second output shaft 1123 and is connected to the second transmission part 1154.

[0109] The second output shaft 1123 may be directly connected to the second transmission part 1154 , or the second output shaft 1123 and the second transmission part 1154 may be connected via an intermediate connecting member.

[0110] The specific structure of the second transmission part 1154 is not limited, as long as it can drive the second housing 1153 to rotate around the rotation axis of the main gear 111. Fig. 9 The second transmission part 1154 may include two first bevel gears 11541 arranged at intervals and two second bevel gears 11542 arranged at intervals and both rotatably connected to the second housing 1153, one of the two first bevel gears 11541 is connected to the second output shaft 1123, the other of the two first bevel gears 11541 is connected to the connecting shaft 116, and the two second bevel gears 11542 are meshed with the two second bevel gears 11542.

[0111] Specifically, the second output shaft 1123 may be directly connected to the first bevel gear 11541 , or the second output shaft 1123 and the first bevel gear 11541 may be connected via an intermediate connecting piece.

[0112] The two first bevel gears 11541 rotate coaxially, and each second bevel gear 11542 can rotate around its own rotation axis, or revolve around the rotation axis of the two first bevel gears 11541. Each second bevel gear 11542 meshes with the two first bevel gears 11541, so that the two first bevel gears 11541 can rotate relative to the second housing 1153, and the second housing 1153 can rotate together with the two first bevel gears 11541. Since one of the first bevel gears 11541 is connected to the second output shaft 1123, the two first bevel gears 11541 actually rotate around the rotation axis of the main gear 111, and therefore, the second housing 1153 also rotates around the rotation axis of the main gear 111.

[0113] Fig. 9 The structure of the transmission assembly 115 shown is similar to that of the differential 112 . In other embodiments, the structure of the transmission assembly 115 may be different from that of the differential 112 by changing the structure of the second transmission portion 1154 .

[0114] Please continue reading Fig. 9 The locking assembly 118 includes a first locking member 1181 and a second locking member 1182. The first locking member 1181 is disposed on the second housing 1153, and the second locking member 1182 is disposed outside the second housing 1153 and is locked with the first locking member 1181. In other words, the locking assembly 118 is used to achieve locking or unlocking of the second housing 1153. When the second housing 1153 is locked, the second housing 1153 cannot rotate, while the connecting shaft 116 can rotate driven by the second transmission part 1154. When the locking of the second housing 1153 is released, the second housing 1153 and the connecting shaft 116 can rotate together.

[0115] The specific structural forms of the first locking member 1181 and the second locking member 1182 are not limited, as long as they can achieve locking or unlocking of the second housing 1153. For example, Fig. 9 The first locking member 1181 shown is a clutch. The clutch achieves locking by clamping the second locking member 1182, and the clutch achieves unlocking by releasing the second locking member 1182. In other embodiments, the second locking member 1182 may also be a clutch.

[0116] See also Fig. 9In order to improve the reliability of locking, the number of the first locking members 1181 can be multiple, and the multiple first locking members 1181 are arranged at intervals along the circumference of the second shell 1153, and the second locking members 1182 correspond to the first locking members 1181 one by one.

[0117] In other embodiments, only one first locking member 1181 and one second locking member 1182 may be provided.

[0118] Please continue reading Fig. 9 and Fig.11 The second synchronizer 117 is disposed on the second output shaft 1123 to be connected to or separated from the second housing 1153. Fig. 9 The second synchronizer 117 is connected to the second housing 1153, and the first locking member 1181 is separated from the second locking member 1182, so that the transmission assembly 115 drives the connecting shaft 116 and the second output shaft 1123 to rotate in the same direction. Fig.11 The second synchronizer 117 is separated from the second housing 1153 , and the first locking member 1181 is locked with the second locking member 1182 , so that the transmission assembly 115 drives the connecting shaft 116 to rotate in the opposite direction relative to the second output shaft 1123 .

[0119] That is, when the second synchronizer 117 is connected to the second housing 1153 and the first locking member 1181 is separated from the second locking member 1182, the second output shaft 1123 can rotate to enable the transmission assembly 115 to drive the connecting shaft 116 to rotate in the same direction, so that the connecting shaft 116 can also rotate in the same direction as the first output shaft 1122. When the second synchronizer 117 is separated from the second housing 1153 and the first locking member 1181 is locked with the second locking member 1182, the second output shaft 1123 can rotate to enable the transmission assembly 115 to drive the connecting shaft 116 to change the rotation direction of the connecting shaft 116, so that the rotation direction of the connecting shaft 116 is opposite to the rotation direction of the second output shaft 1123. Therefore, after the connecting shaft 116 changes its rotation direction driven by the transmission assembly 115, the rotation direction of the connecting shaft 116 is actually opposite to the rotation direction of the first output shaft 1122.

[0120] By controlling the connection or separation of the first synchronizer 113 and the second synchronizer 117 of the differential structure 11 of this embodiment, the first wheel 40 and the second wheel 50 can also realize a variety of different functions.

[0121] For example, see Fig. 9The differential structure 11 has a first state for realizing the function of the wheels rotating in the same direction and at the same speed. In the first state, the first synchronizer 113 is connected to the main gear 111, the second synchronizer 117 is connected to the second housing 1153, and the first locking member 1181 is in an unlocked state separated from the second locking member 1182.

[0122] by Fig. 9 Taking the reduction gearbox 10 shown as an example, when the differential structure 11 is in the first state, the electric drive module drives the input gear 12 to rotate, and the input gear 12 drives the main gear 111 to rotate. Since the first synchronizer 113 is connected to the main gear 111, the first synchronizer 113, the first output shaft 1122, the first output gear 1124, the first housing 1121, the second output gear 1125, and the second output shaft 1123 all rotate in the same direction and at the same speed around the rotation axis of the main gear 111. Since the second synchronizer 117 is connected to the second housing 1153, the first locking member 1181 is in an unlocked state separated from the second locking member 1182, and the second housing 1153 and the connecting shaft 116 can be combined with the second output shaft 1123 to rotate in the same direction and at the same speed, so that the first wheel 40 and the second wheel 50 can rotate in the same direction and at the same speed.

[0123] For example, see Fig.10 The differential structure 11 has a second state for realizing the function of differential rotation of the wheels in the same direction. In the second state, the first synchronizer 113 is separated from the main gear 111, the second synchronizer 117 is connected to the second housing 1153, and the first locking member 1181 is in an unlocked state separated from the second locking member 1182.

[0124] by Fig.10Taking the reduction gearbox 10 shown as an example, when the differential structure 11 is in the second state, the electric drive module drives the input gear 12 to rotate, and the input gear 12 drives the main gear 111 to rotate. The main gear 111 drives the planetary gear 1126 to rotate around the rotation axis of the main gear 111 through the first housing 1121, so that the first output gear 1124, the second output gear 1125, the first output shaft 1122 and the second output shaft 1123 can also rotate in the same direction around the rotation axis of the main gear 111. Since the first synchronizer 113 is separated from the main gear 111, the second synchronizer 117 is connected to the second housing 1153, and the first locking member 1181 is in an unlocked state separated from the second locking member 1182, the first wheel 40 and the first output shaft 1122 rotate in the same direction and at the same speed, and the second housing 1153 and the connecting shaft 116 are combined into one with the second output shaft 1123 and rotate in the same direction and at the same speed. Since the first synchronizer 113 is separated from the main gear 111, the planetary gear 1126 can realize the same-direction differential rotation of the first output shaft 1122 and the second output shaft 1123 through self-rotation. Therefore, the first output shaft 1122 also rotates in the same direction and at a differential speed with the connecting shaft 116, thereby allowing the first wheel 40 and the second wheel 50 to rotate in the same direction and at a differential speed.

[0125] For example, see Fig.11 The differential structure 11 has a third state for realizing the function of the wheels rotating in opposite directions at the same speed. In the third state, the first synchronizer 113 is connected to the main gear 111, the second synchronizer 117 is separated from the second housing 1153, and the first locking member 1181 is in a locked state with the second locking member 1182.

[0126] by Fig.11 Taking the reduction gearbox 10 shown as an example, when the differential structure 11 is in the third state, the electric drive module drives the input gear 12 to rotate, and the input gear 12 drives the main gear 111 to rotate. Since the first synchronizer 113 is connected to the main gear 111, the first synchronizer 113, the first output shaft 1122, the first output gear 1124, the first housing 1121, the second output gear 1125, and the second output shaft 1123 all rotate in the same direction and at the same speed around the rotation axis of the main gear 111. Since the second synchronizer 117 is separated from the second housing 1153, the first locking member 1181 is in a locked state locked with the second locking member 1182. The connecting shaft 116 can rotate in the opposite direction and at the same speed relative to the second output shaft 1123 under the drive of the transmission assembly 115. Therefore, the connecting shaft 116 that rotates in the opposite direction and at the same speed relative to the second output shaft 1123 is actually also rotating in the opposite direction and at the same speed with the first output shaft 1122, thereby allowing the first wheel 40 and the second wheel 50 to rotate in the opposite direction and at the same speed.

[0127] For example, see Fig.12The differential structure 11 has a fourth state for realizing the function of reverse differential rotation of the wheels. In the fourth state, the first synchronizer 113 is separated from the main gear 111, the second synchronizer 117 is separated from the second housing 1153, and the first locking member 1181 is in a locked state with the second locking member 1182.

[0128] by Fig.12 Taking the reduction gearbox 10 shown as an example, when the differential structure 11 is in the fourth state, the electric drive module drives the input gear 12 to rotate, the input gear 12 drives the main gear 111 to rotate, and the input gear 12 drives the main gear 111 to rotate. The main gear 111 drives the planetary gear 1126 to rotate around the rotation axis of the main gear 111 through the first housing 1121, so that the first output gear 1124, the second output gear 1125, the first output shaft 1122 and the second output shaft 1123 can also rotate in the same direction around the rotation axis of the main gear 111. Since the first synchronizer 113 is separated from the main gear 111, the second synchronizer 117 is separated from the second housing 1153, and the first locking member 1181 is in a locked state with the second locking member 1182, the first wheel 40 and the first output shaft 1122 rotate in the same direction and at the same speed, while the connecting shaft 116 rotates in the opposite direction and at the same speed relative to the second output shaft 1123 driven by the transmission assembly 115. Since the first synchronizer 113 is separated from the main gear 111, the planetary gear 1126 can realize the same direction differential rotation of the first output shaft 1122 and the second output shaft 1123 by self-rotation. Therefore, the connecting shaft 116 rotating in the opposite direction and at the same speed relative to the second output shaft 1123 actually also rotates in the opposite direction differentially with the first output shaft 1122, thereby allowing the first wheel 40 and the second wheel 50 to rotate in the opposite direction differentially.

[0129] For example, see Fig.13 The differential structure 11 has a fifth state for realizing the electric drive disconnection function. In the fifth state, the first synchronizer 113 is separated from the main gear 111, the second synchronizer 117 is separated from the second housing 1153, and the first locking member 1181 is in an unlocked state separated from the second locking member 1182.

[0130] by Fig.13Taking the reduction gearbox 10 shown as an example, when the differential structure 11 is in the fifth state, the electric drive module is in a non-working state of stopping operation. Since the first synchronizer 113 is separated from the main gear 111, the second synchronizer 117 is separated from the second housing 1153, and the first locking member 1181 is in an unlocked state separated from the second locking member 1182, if the first wheel 40 and the second wheel 50 rotate, the first wheel 40 drives the planetary gear 1126 to rotate through the first output shaft 1122 and the first output gear 1124, and then drives the second transmission part 1154 to move through the second output gear 1125 and the second output shaft 1123, so that the second transmission part 1154 drives the second housing 1153 to rotate, and the first output shaft 1122 cannot transmit power to the electric drive module. At the same time, the second wheel 50 also transmits power to the second housing 1153 by driving the connecting shaft 116 to rotate, and the second output shaft 1123 cannot transmit power to the electric drive module. For example, Fig.13 In the transmission assembly 115 shown, the second output shaft 1123 rotates by driving the first bevel gear 11541 connected thereto, so that the two second bevel gears 11542 drive the second housing 1153 to rotate. At the same time, the second wheel 50 rotates by driving the connecting shaft 116, so that the first bevel gear 11541 connected to the connecting shaft 116 transmits power to the second housing 1153 through the two second bevel gears 11542. The speed difference between the second output shaft 1123 and the connecting shaft 116 is eliminated by the self-rotation of the two second bevel gears 11542, so that the second output shaft 1123 cannot transmit power to the electric drive module, and the power of the rotation of the first wheel 40 and the second wheel 50 cannot be transmitted to the electric drive module through the differential 112, thereby realizing the disconnection of the electric drive module from the wheel end.

[0131] The second differential structure 11 adopted by the reduction box 10 of the embodiment of the present application can also change the rotation direction of the connecting shaft 116 driven by the transmission assembly 115 by setting the first synchronizer 113, the second synchronizer 117, the transmission assembly 115, the locking assembly 118 and the connecting shaft 116, so that the rotation direction of the connecting shaft 116 is opposite to the rotation direction of the first output shaft 1122 of the differential 112, so that the rotation directions of the first wheel 40 driven by the first output shaft 1122 and the second wheel 50 driven by the connecting shaft 116 are opposite, thereby, the vehicle can also realize the functions of turning in place and driving with a small turning radius. The differential structure 11 is also simple in structure, relatively low in cost, less impact on the original structure of the vehicle, and good in feasibility.

[0132] In addition, the second differential structure 11 of the present application can also realize the function of disconnecting the electric drive module from the wheel end, thereby eliminating the reverse drag energy loss of the electric drive module and improving power economy.

[0133] In the description of the present application, the description with reference to the terms "in one embodiment", "in some embodiments", "in other embodiments", "in yet other embodiments", or "exemplary" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiments of the present application. In the present application, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, those skilled in the art may combine the different embodiments or examples described in the present application and the features of the different embodiments or examples without contradiction.

[0134] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application are included in the protection scope of the present application.

Claims

1. A differential structure of a reduction gearbox, characterized in that: include: Main gear; A differential, the differential comprising a first housing and a first output shaft and a second output shaft disposed on opposite sides of the first housing, the first output shaft passing through the main gear, and the first housing being connected to the main gear; a first synchronizer, the first synchronizer being arranged on the first output shaft to be connected to or separated from the main gear; a connecting member, the connecting member being arranged on the second output shaft; A transmission assembly, the transmission assembly being in transmission connection with the connecting member; A connecting shaft, the connecting shaft being rotatably disposed through the transmission assembly; A second synchronizer, the second synchronizer is arranged on the connecting shaft to be connected or separated from the connecting member, and connected or separated from the transmission assembly; the second synchronizer is connected to the connecting member and separated from the transmission assembly so that the second output shaft drives the connecting shaft to rotate in the same direction; the second synchronizer is connected to the transmission assembly and separated from the connecting member so that the transmission assembly drives the connecting shaft to rotate in the opposite direction relative to the second output shaft.

2. The differential structure according to claim 1, characterized in that: The connecting member is a connecting gear sleeved on the second output shaft and meshed with the transmission assembly.

3. The differential structure according to claim 2, characterized in that: The transmission assembly includes a first transmission part and a transmission gear, wherein the first transmission part is respectively meshed with the connecting gear and the transmission gear to drive the transmission gear to rotate in the opposite direction relative to the second output shaft during the rotation of the second output shaft; the connecting shaft is rotatably inserted into the transmission gear, and the second synchronizer is connected to or separated from the transmission gear.

4. The differential structure according to claim 3, characterized in that: The first transmission part includes a first gear, a second gear, a third gear and a gear shaft, the first gear is meshed with the connecting gear, the gear shaft is respectively connected to the first gear and the second gear, and the third gear is respectively meshed with the second gear and the transmission gear.

5. The differential structure according to claim 3 or 4, characterized in that: A portion of the connecting shaft is located between the second output shaft and the transmission gear, and the second synchronizer is arranged at a portion of the connecting shaft between the second output shaft and the transmission gear; the second synchronizer includes a first connecting portion toward the connecting gear and a second connecting portion toward the transmission gear, the first connecting portion is connected to or separated from the connecting member, and the second connecting portion is connected to or separated from the transmission gear.

6. The differential structure according to any one of claims 1 to 4, characterized in that: The differential structure has a first state for realizing the function of the wheels rotating in the same direction and at the same speed. In the first state, the first synchronizer is connected to the main gear, and the second synchronizer is connected to the connecting member and is separated from the transmission assembly; and / or, The differential structure has a second state for realizing the function of differential rotation of the wheels in the same direction. In the second state, the first synchronizer is separated from the main gear, and the second synchronizer is connected to the connecting member and separated from the transmission assembly; and / or, The differential structure has a third state for realizing the function of the wheels rotating in opposite directions at the same speed. In the third state, the first synchronizer is connected to the main gear, and the second synchronizer is separated from the connecting member and connected to the transmission assembly; and / or, The differential structure has a fourth state for realizing the function of reverse differential rotation of the wheels, in which the first synchronizer is separated from the main gear, the second synchronizer is separated from the connecting member, and is connected to the transmission assembly; and / or, The differential structure has a fifth state for realizing the electric drive disconnection function. In the fifth state, the first synchronizer is separated from the main gear, and the second synchronizer is separated from the connecting member and the transmission assembly, respectively.

7. A differential structure of a reduction gearbox, characterized in that: include: Main gear; A differential, the differential comprising a first housing and a first output shaft and a second output shaft disposed on opposite sides of the first housing, the first output shaft passing through the main gear, and the first housing being connected to the main gear; a first synchronizer, the first synchronizer being arranged on the first output shaft to be connected to or separated from the main gear; A transmission assembly, the transmission assembly comprising a second housing and a second transmission part transmission-connected to the second housing, the second output shaft being connected to the second transmission part, and the second output shaft being rotated so that the second transmission part can drive the second housing to rotate around the rotation axis of the main gear; a connecting shaft, the connecting shaft being arranged on a side of the second transmission part away from the second output shaft and connected to the second transmission part; A locking assembly, the locking assembly comprising a first locking member and a second locking member, the first locking member being disposed on the second housing, the second locking member being disposed outside the second housing and lockingly matched with the first locking member; A second synchronizer, the second synchronizer is arranged on the second output shaft to be connected or separated from the second housing; the second synchronizer is connected to the second housing, and the first locking member is separated from the second locking member, so that the transmission assembly drives the connecting shaft and the second output shaft to rotate in the same direction; the second synchronizer is separated from the second housing, and the first locking member is locked with the second locking member, so that the transmission assembly drives the connecting shaft to rotate in the opposite direction relative to the second output shaft.

8. The differential structure according to claim 7, characterized in that: The second transmission portion includes two first bevel gears arranged at intervals and two second bevel gears arranged at intervals and both rotatably connected to the second housing, one of the two first bevel gears is connected to the second output shaft, the other of the two first bevel gears is connected to the connecting shaft, and the two second bevel gears are meshed with the two second bevel gears.

9. The differential structure according to claim 7 or 8, characterized in that: One of the first locking member and the second locking member is a clutch.

10. The differential structure according to claim 7 or 8, characterized in that: There are multiple first locking members, which are arranged at intervals along the circumference of the second shell, and the second locking members correspond to the first locking members one by one.

11. The differential structure according to claim 7 or 8, characterized in that: The differential structure has a first state for realizing the function of the wheels rotating in the same direction and at the same speed. In the first state, the first synchronizer is connected to the main gear, the second synchronizer is connected to the second housing, and the first locking member is in an unlocked state separated from the second locking member; and / or, The differential structure has a second state for realizing the function of differential rotation of the wheels in the same direction. In the second state, the first synchronizer is separated from the main gear, the second synchronizer is connected to the second housing, and the first locking member is in an unlocked state separated from the second locking member. and / or, The differential structure has a third state for realizing the function of the wheels rotating in opposite directions at the same speed. In the third state, the first synchronizer is connected to the main gear, the second synchronizer is separated from the second housing, and the first locking member is in a locked state with the second locking member; and / or, The differential structure has a fourth state for realizing a function of reverse differential rotation of the wheels, in which the first synchronizer is separated from the main gear, the second synchronizer is separated from the second housing, and the first locking member is in a locked state with the second locking member; and / or, The differential structure has a fifth state for realizing the electric drive disconnection function. In the fifth state, the first synchronizer is separated from the main gear, the second synchronizer is separated from the second housing, and the first locking member is in an unlocked state separated from the second locking member.

12. The differential structure according to any one of claims 1 to 11, characterized in that: The differential includes a first output gear, a second output gear and two planetary gears, the first output gear is connected to the first output shaft, the second output gear is connected to the second output shaft, and the two planetary gears are both rotatably connected to the first housing and meshed with the first output gear and the second output gear.

13. The differential structure according to any one of claims 1 to 11, characterized in that: The differential structure further includes two bearings, and the two bearings are respectively sleeved on the first output shaft and the second output shaft.

14. A reduction gearbox, characterized in that: Comprising the differential structure described in any one of claims 1-13.

15. The reduction gearbox according to claim 14, characterized in that: The reduction gearbox includes an input gear meshing with the main gear.

16. A vehicle, characterized in that: It includes a first drive shaft, a second drive shaft, a first wheel, a second wheel, an electric drive module and the reduction gearbox as described in claim 14 or 15, the first drive shaft is respectively connected to the first output shaft and the first wheel, the second drive shaft is respectively connected to the connecting shaft and the second wheel, and the electric drive module is used to provide driving force for the rotation of the main gear.

Images