CN218948852U - Electric drive rear axle assembly with parallel shaft structure - Google Patents
Electric drive rear axle assembly with parallel shaft structure Download PDFInfo
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- CN218948852U CN218948852U CN202223362467.XU CN202223362467U CN218948852U CN 218948852 U CN218948852 U CN 218948852U CN 202223362467 U CN202223362467 U CN 202223362467U CN 218948852 U CN218948852 U CN 218948852U
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- axle
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Abstract
The utility model relates to an electric drive rear axle assembly with a parallel shaft structure, wherein a motor and an axle housing axis are arranged in a parallel structure, a motor housing is connected to a speed reducer housing through a group of bolts, and a gear shaft of the central shaft is connected with the input end of a speed reducer through a spline. The reduction gearbox can be designed into a two-stage reduction or three-stage reduction structure according to different torque speed ratio requirements, and a parking brake is connected to a secondary gear shaft of the reduction gearbox, so that a parking brake function is realized. The output end gear of the reduction box gear set is connected with the differential shell through a bolt, so that the differential function of the reduction box is realized. The bearing part adopts the traditional axle housing with an integral structure, is more stable and reliable and is easy for vehicle maintenance, and the wheel end structure can freely select different structural forms such as liquid braking, air braking and the like according to different requirements of the whole vehicle, so that the bearing part is not limited by the structure.
Description
Technical field:
the utility model relates to the technical field of electric automobiles, in particular to a rear drive axle assembly of an electric automobile.
The background technology is as follows:
the current electric automobile in the field of light commercial vehicles uses a motor to replace a traditional engine to drive a rear axle of a traditional main driven bevel gear speed reducing structure so as to realize the whole vehicle driving. The motor is characterized by large volume, heavy weight, high cost and low electric energy recycling rate. With the increasing demand of commercial vehicles, the problem of pure electric commercial vehicles in the use process is also increasingly raised, and the problem of the integration of the rear drive axle is particularly prominent. Various electric drive bridge structural forms with different structures, such as an axial electric drive bridge, a semi-coaxial electric drive bridge or an independent drive module structure, have the problems of high cost, poor bearing and inconvenient maintenance on a commercial vehicle, and an electric drive bridge scheme capable of realizing high integration and solving the bearing and maintenance problems is urgently needed.
The utility model comprises the following steps:
the utility model aims to solve the defects of high cost, poor bearing and inconvenient maintenance of an electric drive axle in the prior art, and provides an electric drive rear axle assembly with a parallel shaft structure, which is more suitable for light truck types.
The technical scheme adopted by the utility model is as follows:
the utility model provides an electric drive rear axle assembly of parallel axle structure, includes the axle housing, and the axle housing middle part is equipped with differential mechanism, connects the reduction gear on the differential mechanism, and two semi-axis gears in the differential mechanism connect the semi-axis respectively, and wheel hub is connected respectively to the axle head of every semi-axis, its characterized in that:
the lower end of the speed reducer shell is connected with the middle part of the axle housing, one side of the upper part of the speed reducer shell is connected with a driving motor, so that the driving motor is biased at one side of the axle housing and is arranged in parallel with the axle housing, the driving motor is also connected with a motor bracket, and the other end of the motor bracket is connected with the axle housing;
the speed reducer shell is internally provided with a first speed reducing gear shaft, a second speed reducing gear shaft and a third speed reducing gear shaft, each speed reducing gear shaft is respectively provided with a gear to form meshing transmission, the first speed reducing gear shaft is connected with a driving motor, an output gear on the third gear shaft is meshed with an output end gear, and the output end gear is connected to the differential shell through a bolt.
Further, a parking brake flange is connected to the second reduction gear shaft, a parking brake hub is connected to the parking brake flange, and a parking brake is arranged in the parking brake hub.
Furthermore, a connecting sleeve and a hub which are in running fit are arranged on each half shaft, one side of the hub is connected with one side of the connecting sleeve, and the other side of the connecting sleeve is connected with the shaft end of the half shaft.
Further, a brake is formed on the upper part of the half shaft in the hub.
In the technical scheme, the driving motor is a solid shaft water-cooling permanent magnet synchronous flat wire motor, the motor shell is connected to the speed reducer shell through a group of bolts, and the center of the motor shell is connected with the gear shaft at the input end of the speed reducer through a spline. The gear sets of the reduction gearbox all adopt external meshing cylindrical helical gear structures with mature processes, and the transmission is stable and reliable. The second-stage gear shaft of the reduction box is connected with a parking brake, so that the parking brake function is realized. The output gears of the gear sets of the reduction boxes are integrated together through the differential shells connected through bolts, so that the differential function of the reduction boxes is realized. The bearing part adopts the traditional axle housing with an integral structure, is more stable and reliable and is easy for vehicle maintenance. The wheel end structure can freely select different structural forms such as liquid braking, air braking and the like according to different requirements of the whole vehicle, and is not limited by the structure.
Compared with the prior art, the utility model has the following advantages: the utility model has the advantages of compact structure, reasonable design, high bearing capacity, good manufacturability of parts, high electric energy recycling rate, convenient maintenance and the like.
Description of the drawings:
FIG. 1 is a cross-sectional view of the structure of the present utility model;
FIG. 2 is a perspective view of the structure in which the output gear of the reduction gear set of FIG. 1 is connected to the differential housing;
fig. 3 is a partial enlarged view of fig. 1.
The specific embodiment is as follows:
as shown in fig. 1, the electric drive rear axle assembly with a parallel axle structure provided by the utility model comprises an axle housing 5, wherein a differential mechanism is arranged in the middle of the axle housing 5, the differential mechanism is connected with a speed reducer, two side gears 18 in the differential mechanism are respectively connected with a half axle 7, and the axle end of each half axle 7 is respectively connected with a hub 6;
the lower extreme of reduction gear casing 2 passes through bolted connection with axle housing 5 middle part, and driving motor 1 is connected to upper portion one side of reduction gear casing 2, makes driving motor 1 biasing in one side of axle housing 5 and be parallel arrangement with the axle housing, still connects a motor support 10 on the driving motor 1, and the other end of motor support 10 passes through bolted connection on axle housing 5. The driving motor is a permanent magnet synchronous water-cooled flat wire motor, the output end shell of the permanent magnet synchronous water-cooled flat wire motor is connected with the reduction gearbox shell through a bolt, and the other end of the driving motor is supported on the axle housing through a motor bracket in a bolt connection manner, so that the weight of the motor is shared; the output end of the central shaft of the motor is connected with the gear shaft of the input end of the speed reducer through a spline, so that the motor only bears radial force and does not bear axial force, and the motor structure is more compact.
The speed reducer housing 2 is provided with a first speed reducer gear shaft 13, a second speed reducer gear shaft 14 and a third speed reducer gear shaft 15, the first speed reducer gear shaft 13 is connected with the driving motor 1, the first speed reducer gear shaft 13 is connected with a first gear X1, the second speed reducer gear shaft 14 is connected with second gears X2 and X3, and the third speed reducer gear shaft 15 is connected with third gears X4 and X5, each of which forms meshing transmission respectively.
Referring to fig. 1 and 2, the output gear X5 on the third gear shaft 15 is meshed with the output gear 19, and the output gear 19 is connected to the differential case 21 by a bolt 20.
Referring to fig. 1 and 3, a parking brake flange 16 is connected to the second reduction gear shaft 14, a parking brake hub 4 is connected to the parking brake flange, and a parking brake 17 is disposed in the parking brake hub 4.
Referring to fig. 1, each half shaft 7 is provided with a connecting sleeve 8 and a hub 6 which are in running fit, one side of the hub 6 is connected with one side of the connecting sleeve 8, the other side of the connecting sleeve 8 is connected with the shaft end of the half shaft 7, and a brake 9 is formed on the half shaft 7 in the hub 6.
The rotating speed of the first-stage gear shaft is higher, the first-stage gear shaft is supported on the reduction gearbox shell through a pair of deep groove ball bearings, and the bearing play is eliminated through a wave spring so as to avoid suddenly accelerating and damaging a bearing raceway in no-load;
the second-stage gear shaft, the third-stage gear shaft and the output-end gear shaft are lower in rotating speed and larger in bearing axial force, are respectively supported on the reduction gearbox shell through a pair of tapered roller bearings, and are preloaded through selecting and installing gaskets with proper thickness.
The brake drum of the parking brake is a rotating piece and is connected to one end of a secondary gear shaft of the reduction gearbox through a flange with a spline, and the parking brake is connected to a shell of the reduction gearbox through a bolt and is provided with a hand pulling wire to realize the parking brake function.
Claims (4)
1. The utility model provides an electric drive rear axle assembly of parallel axle structure, includes axle housing (5), and axle housing (5) middle part is equipped with differential mechanism, connects the reduction gear on the differential mechanism, and half axle (7) are connected respectively to two side gears (18) in the differential mechanism, and wheel hub (6) are connected respectively to the axle head of every half axle (7), its characterized in that:
the lower end of the speed reducer shell (2) is connected with the middle part of the axle housing (5), one side of the upper part of the speed reducer shell (2) is connected with the driving motor (1), so that the driving motor (1) is biased at one side of the axle housing (5) and is arranged in parallel with the axle housing, the driving motor (1) is also connected with a motor bracket (10), and the other end of the motor bracket (10) is connected with the axle housing (5);
be equipped with first reduction gear axle (13), second reduction gear axle (14) and third reduction gear axle (15) in reduction gear casing (2), every reduction gear axle is equipped with the gear respectively and forms the meshing transmission, and first reduction gear axle (13) are connected with driving motor (1), and output gear (X5) on third reduction gear axle (15) are meshed with output gear (19), and output gear (19) are connected on differential mechanism casing (21) through bolt (20).
2. The electrically driven rear axle assembly of a parallel axle configuration of claim 1, wherein:
the second reduction gear shaft (14) is connected with a parking brake flange (16), the parking brake flange is connected with a parking brake hub (4), and a parking brake (17) is arranged in the parking brake hub (4).
3. The electrically driven rear axle assembly of a parallel axle configuration of claim 2, wherein:
and each half shaft (7) is provided with a connecting sleeve (8) and a hub (6) which are in running fit, one side of the hub (6) is connected with one side of the connecting sleeve (8), and the other side of the connecting sleeve (8) is connected with the shaft end of the half shaft (7).
4. An electrically driven rear axle assembly of a parallel axle construction as set forth in claim 3 wherein:
a brake (9) is connected to the upper part of the half shaft (7) in the hub (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223362467.XU CN218948852U (en) | 2022-12-15 | 2022-12-15 | Electric drive rear axle assembly with parallel shaft structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223362467.XU CN218948852U (en) | 2022-12-15 | 2022-12-15 | Electric drive rear axle assembly with parallel shaft structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218948852U true CN218948852U (en) | 2023-05-02 |
Family
ID=86136150
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223362467.XU Active CN218948852U (en) | 2022-12-15 | 2022-12-15 | Electric drive rear axle assembly with parallel shaft structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218948852U (en) |
-
2022
- 2022-12-15 CN CN202223362467.XU patent/CN218948852U/en active Active
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