CN214492531U

CN214492531U - Integrated two-gear electrically driven axle assembly

Info

Publication number: CN214492531U
Application number: CN202120021098.4U
Authority: CN
Inventors: 徐秀良; 许电波; 孔卓; 秦厚明; 李�浩; 李彬; 李传伟; 张�林; 徐磊
Original assignee: China National Heavy Duty Truck Group Jinan Power Co Ltd
Current assignee: Sinotruk Jinan Power Co Ltd; China National Heavy Duty Truck Group Jinan Power Co Ltd
Priority date: 2021-01-05
Filing date: 2021-01-05
Publication date: 2021-10-26
Anticipated expiration: 2031-01-05

Abstract

The application provides an integrated two-gear electrically-driven axle assembly, which relates to the technical field of vehicle driving and comprises a motor, a reducer assembly, an axle housing assembly, a brake assembly and a hub assembly, wherein the motor is connected with the reducer assembly; the reducer assembly is fixed on the axle housing assembly through the reducer shell. The integrated two-gear electrically-driven axle assembly provided by the application integrates the motor and the axle into a whole, a transmission shaft is not needed, the weight of the power assembly is greatly reduced, and the energy consumption of the whole vehicle is reduced; the space of the whole vehicle is improved. The integrated design of the electric axle is not only an innovation of the structure, but also the design of the whole vehicle chassis is simplified by the self-assembly power assembly system, the space of the chassis is saved, and the noise is reduced.

Description

Integrated two-gear electrically driven axle assembly

Technical Field

The application relates to the technical field of vehicle driving, in particular to an integrated two-gear electrically driven axle assembly.

Background

From the technical development trend of new energy automobile electric drive systems at home and abroad, the development is generally towards the integration and integration of power systems. In the prior art, an integrated electric drive axle system is complex in mechanism and high in cost control difficulty; the power assembly has heavy weight and small space of the whole vehicle.

SUMMERY OF THE UTILITY MODEL

To the problem that exists among the prior art, this application provides a two grades of electrically driven axle assemblies of integrated form to reach the weight that has alleviateed power assembly by a wide margin, reduce the energy resource consumption of whole car, promote the beneficial effect in whole car space.

The application provides two grades of electrically driven axle assemblies of integrated form, including motor, reduction gear assembly, axle housing assembly, stopper assembly and wheel hub assembly, the motor links to each other with the reduction gear assembly, the reduction gear assembly is fixed on the axle housing assembly, both ends at the axle housing assembly are fixed respectively to stopper assembly and wheel hub assembly; the speed reducer assembly is fixed on the axle housing assembly through the speed reducer shell.

Preferably, the speed reducer assembly comprises a speed reducer shell, a cylindrical gear mechanism, a planetary speed reducing mechanism, a differential mechanism and a gear shifting mechanism; the motor transmits power to a sun gear of the planetary reduction mechanism through the cylindrical gear mechanism and the gear shifting mechanism, and a shell of the differential mechanism is connected with a first half shaft and a second half shaft respectively; the differential mechanism comprises a differential and a vehicle speed sensor arranged on the differential.

Preferably, the reduction gear assembly includes one, two and triaxial, connect one on the output shaft of motor, one links to each other through intermeshing's first gear and second gear with two axles, two axles pass through the third gear and link to each other with the second semi-axis, the outside of second semi-axis is equipped with the triaxial, the triaxial links to each other with planetary mechanism's sun gear, and planetary mechanism still includes the planet carrier, the planet carrier links to each other with the differential case, the differential case links to each other with first semi-axis and second semi-axis respectively.

Preferably, the gear shifting mechanism comprises a return spring cylinder, a shifting fork shaft, a shifting fork, an air cylinder, a shaft, a low-grade driven gear, a sliding meshing sleeve and a high-grade driven gear, wherein the return spring cylinder and the air cylinder are respectively arranged at two ends of the shifting fork shaft, one end of the shifting fork is sleeved at the middle part of the shifting fork shaft, the other end of the shifting fork is sleeved on the shaft through the sliding meshing sleeve, and the low-grade driven gear and the high-grade driven gear are respectively sleeved at two sides of the sliding meshing sleeve on the shaft.

Preferably, the cylindrical gear mechanism is arranged in the speed reducer shell, and the cylindrical gear mechanism, the motor, the first half shaft, the second half shaft and the wheel hub form a transmission chain.

Preferably, the differential mechanism is mounted on the reducer housing, and the differential mechanism is connected with the tires on two sides through a first half shaft and a second half shaft respectively.

Preferably, the differential mechanism is provided with a vehicle speed gear ring.

Preferably, the vehicle speed sensor is provided on the retarder housing.

The beneficial effect of this application lies in:

the integrated two-gear electrically-driven axle assembly provided by the application integrates the motor and the axle into a whole, a transmission shaft is not needed, the weight of the power assembly is greatly reduced, and the energy consumption of the whole vehicle is reduced; the space of the whole vehicle is improved. The integrated design of the electric axle is not only an innovation of the structure, but also the design of the whole vehicle chassis is simplified by the self-assembly power assembly system, the space of the chassis is saved, and the noise is reduced. The invention realizes different distribution of driving force under different vehicle speeds and different loads through the two-gear speed reducer. If the vehicle is accelerated rapidly and climbs a slope, a low-speed gear is adopted, so that the dynamic property of the whole vehicle is ensured; and a high-speed gear is adopted at high speed, so that the highest speed and the high-speed efficiency of the vehicle are ensured.

In addition, the design principle of the application is reliable, the structure is simple, and the application prospect is very wide.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of an integrated two-gear electrically-driven axle assembly according to an embodiment of the present application.

Fig. 2 is a schematic sectional structure view of fig. 1.

Fig. 3 is a partially enlarged schematic view of fig. 2.

Fig. 4 is a partial structural schematic view of fig. 1.

Fig. 5 is a schematic structural diagram of a shift mechanism in an embodiment of the present application.

In the figure, 1, a motor, 2, a reducer assembly, 3, an axle housing assembly, 4, a brake assembly, 5, a first half shaft, 6, a second half shaft, 7, a differential case, 8, a vehicle speed gear ring, 9, a first shaft, 10, a second shaft, 11, a third shaft, 12, a first gear, 13, a second gear, 14, a third gear, 15, an operating cylinder, 16, a low-gear driven gear, 17, a sliding meshing sleeve, 18, a high-gear driven gear, 19, a return spring cylinder, 20, a shifting fork shaft, 21, a shifting fork, 22, a sun gear, 23 and a planet carrier.

Detailed Description

In order to make those skilled in the art better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The following explains key terms appearing in the present application.

The application provides a two grades of electrically driven axle assemblies of integrated form, including motor 1, reduction gear assembly 2, axle housing assembly 3, brake assembly 4 and wheel hub assembly, motor 1 links to each other with reduction gear assembly 2, reduction gear assembly 2 is fixed on axle housing assembly 3, brake assembly 4 and wheel hub assembly are fixed respectively at the both ends of axle housing assembly 3; and the speed reducer assembly 2 is fixed on the axle housing assembly 3 through a speed reducer shell. The axle housing assembly 3 comprises an axle housing middle section, a shaft head and a braking flange.

The speed reducer assembly 2 comprises a speed reducer shell, a cylindrical gear mechanism, a planetary speed reducing mechanism, a differential mechanism and a gear shifting mechanism; the speed reducer assembly 2 transmits power of the motor 1 to the half shafts and the wheel edges, specifically, the motor 1 transmits the power to a sun gear 22 of a planetary speed reducing mechanism through a cylindrical gear mechanism and a gear shifting mechanism, and a shell of the differential mechanism is connected with a first half shaft 5 and a second half shaft 6 respectively.

The cylindrical gear mechanism is arranged in the speed reducer shell, and after the cylindrical gear mechanism is arranged on the axle shell, the cylindrical gear mechanism, the motor 1, the two half shafts and the wheel hub form a complete transmission chain. The differential mechanism comprises a differential and a vehicle speed sensor arranged on the differential, and the vehicle speed sensor is arranged on the speed reducer shell. The differential mechanism is arranged on the speed reducer shell, is respectively connected with the tires at two sides through a first half shaft 5 and a second half shaft 6, transmits power to the tires at two sides through the half shafts, and transmits a vehicle speed signal; the gear shifting mechanism can realize two-gear speed reduction gear shifting operation; the two-gear cylindrical gear speed reducing mechanism can realize gear shifting operation.

The speed reducer assembly 2 comprises a shaft 9, a shaft 10 and a shaft 11, the output shaft of the motor 1 is connected with the shaft 9, the shaft 9 is connected with the shaft 10 through a first gear 12 and a second gear 13 which are meshed with each other, the shaft 10 is connected with the second half shaft 6 through a third gear 14, the shaft 11 is arranged outside the second half shaft 6, the shaft 11 is connected with a sun gear 22 of the planetary mechanism, the planetary mechanism further comprises a planet carrier 23, the planet carrier 23 is connected with a differential case 7, and the differential case 7 is respectively connected with the first half shaft 5 and the second half shaft 6.

The gear shifting mechanism comprises a return spring cylinder 19, a shifting fork shaft 20, a shifting fork 21, an operating cylinder 15, a shaft, a low-gear driven gear 16, a sliding meshing sleeve 17 and a high-gear driven gear 18, wherein the return spring cylinder 19 and the operating cylinder 15 are respectively arranged at two ends of the shifting fork shaft 20, one end of the shifting fork 21 is sleeved at the middle of the shifting fork shaft 20, the other end of the shifting fork is sleeved on the shaft through the sliding meshing sleeve 17, and the low-gear driven gear 16 and the high-gear driven gear 18 are respectively sleeved at two sides of the sliding meshing sleeve 17 on the shaft.

The gear shifting mechanism is provided with two gears, the two-gear cylindrical gear speed reducing mechanism can realize torque transmission of a single driving machine in different gear pairs according to selection of high and low gears, power is output to the planetary speed reducing mechanism, and the cylindrical gear speed reducing mechanism and the planetary speed reducing mechanism have speed reducing and torque increasing functions.

The motor 1 outputs power to a cylindrical gear mechanism, passes through a two-gear shifting mechanism, selects two speed reduction bevel gears transmitted to the three shafts 11, transmits the power to a sun gear 22 of a planetary speed reduction mechanism in an axle housing, transmits the power to a differential case 7 through a planet carrier 23, and then distributes the power to two half shafts through the differential, and finally transmits the power to wheels.

The power input of the speed reducer assembly 2 is transmitted to the secondary shaft 10 through the primary gear pair in sequence; under the action of the two-gear shifting mechanism, a high-gear or low-gear secondary gear pair is selected to output power to the three shaft 11, the three shaft 11 is connected with the planetary reduction mechanism, the power is transmitted to the differential mechanism after the planetary reduction, the power is distributed to the two half shafts under the action of the differential mechanism, and finally the power is transmitted to wheels respectively.

In order to collect the rotating speed of the differential mechanism, a speed gear ring 8 is further arranged on the differential mechanism shell 7, and a speed sensor is fixed on the reducer shell to collect the rotating speed of the gear ring and is used for providing a speed signal for the whole vehicle and providing a rotating speed reference for a gear shifting control strategy.

In order to meet the requirements of driving and parking braking, the axle housing is also provided with a corresponding brake, an air chamber, a brake mounting plate and a required ABS sensor assembly related mounting structure and an interface; in order to meet the requirements of bearing and connecting with a vehicle frame, the axle housing is also provided with installation structures and interfaces such as relevant plate springs, thrust rods, stabilizer bars, hubs and the like.

The invention realizes different driving forces under different speeds and different loads by setting two-gear shifting; the output torque of the motor and the working of the motor in a high-efficiency interval can be improved, and the power economy is improved.

The implementation manner of the embodiment is as follows:

when the high gear is hung, the motor 1 distributed on one side of the axle outputs power to the first shaft 9, the first gear 12, the second shaft 10, the second gear 13 and the third gear 14, and then transmits the power to the low gear moving gear 16 and the high gear moving gear 18, the high gear moving gear 18 is combined with the sliding meshing sleeve 17 through the gear shifting mechanism, the power is transmitted to the third shaft 11, the third shaft 11 is continuously transmitted to the sun gear 22 of the planetary mechanism, then the power is transmitted to the differential case 7 through the planet carrier 23, and then the differential case 7 distributes the power to the first half shaft 5 and the second half shaft 6 and finally transmits the power to wheels.

When the low gear is engaged, the motor 1 transmits power to the two shafts 10 through the first shaft 9, the first gear 12 and the second gear 13, the low-gear driven gear 16 and the sliding meshing sleeve 17 are combined through the gear shifting mechanism, and then the power is finally transmitted to wheels through the three shafts 11, the sun gear 22, the planet carrier 23, the differential case 7, the first half shaft 5 and the second half shaft 6.

The two-gear shifting assembly comprises a return spring cylinder 19, an operating cylinder 15, a shifting fork shaft 20, a shifting fork 21 and a sliding meshing sleeve 17. The operating cylinder 15 can provide operating force to the left and right sides, so that the shifting fork shaft 20 and the shifting fork 33 shift the sliding engagement sleeve 17 to the left or the right, and the low-gear driven gear 16 or the high-gear driven gear 18 is engaged with the three shaft 11. When no air pressure exists in the operating cylinder 15, the return spring cylinder 19 and the internal spring return the sliding engagement sleeve 17 to the neutral position or keep the sliding engagement sleeve at the neutral position by pushing the shift fork shaft 20 and the shift fork 21.

The invention realizes different distribution of driving force under different vehicle speeds and different loads through the two-gear speed reducer. If the vehicle is accelerated rapidly and climbs a slope, a low-speed gear is adopted, so that the dynamic property of the whole vehicle is ensured; and a high-speed gear is adopted at high speed, so that the highest speed and the high-speed efficiency of the vehicle are ensured.

Although the present application has been described in detail with reference to the accompanying drawings in conjunction with the preferred embodiments, the present application is not limited thereto. Various equivalent modifications or substitutions can be made on the embodiments of the present application by those skilled in the art without departing from the spirit and scope of the present application, and these modifications or substitutions are intended to be covered by the present application/any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. An integrated form two grades of electrically driven axle assemblies which characterized in that: the brake device comprises a motor (1), a speed reducer assembly (2), an axle housing assembly (3), a brake assembly (4) and a wheel hub assembly, wherein the motor (1) is connected with the speed reducer assembly (2), the speed reducer assembly (2) is fixed on the axle housing assembly (3), and the brake assembly (4) and the wheel hub assembly are respectively fixed at two ends of the axle housing assembly (3); the speed reducer assembly (2) is fixed on the axle housing assembly (3) through a speed reducer shell.

2. The integrated two-speed electric drive axle assembly according to claim 1, wherein: the speed reducer assembly (2) comprises a speed reducer shell, a cylindrical gear mechanism, a planetary speed reducing mechanism, a differential mechanism and a gear shifting mechanism; the motor (1) transmits power to a sun gear (22) of the planetary reduction mechanism through a cylindrical gear mechanism and a gear shifting mechanism, and a shell of the differential mechanism is connected with a first half shaft (5) and a second half shaft (6) respectively; the differential mechanism comprises a differential and a vehicle speed sensor arranged on the differential.

3. The integrated two-speed electric drive axle assembly according to claim 1, wherein: reduction gear assembly (2) are including one (9), two axles (10) and triaxial (11), a connecting axle (9) on the output shaft of motor (1), one axle (9) links to each other through intermeshing's first gear (12) and second gear (13) with two axles (10), two axles (10) link to each other with second semi-axis (6) through third gear (14), the outside of second semi-axis (6) is equipped with triaxial (11), triaxial (11) link to each other with planetary mechanism's sun gear (22), planetary mechanism still includes planet carrier (23), planet carrier (23) link to each other with differential case (7), differential case (7) link to each other with first semi-axis (5) and second semi-axis (6) respectively.

4. The integrated two-speed electric drive axle assembly according to claim 2, wherein: the gear shifting mechanism comprises a return spring cylinder (19), a shifting fork shaft (20), a shifting fork (21), an operating cylinder (15), a shaft, a low-gear driven gear (16), a sliding meshing sleeve (17) and a high-gear driven gear (18), wherein the return spring cylinder (19) and the operating cylinder (15) are respectively arranged at two ends of the shifting fork shaft (20), one end of the shifting fork (21) is sleeved at the middle part of the shifting fork shaft (20), the other end of the shifting fork shaft is sleeved on the shaft through the sliding meshing sleeve (17), and the low-gear driven gear (16) and the high-gear driven gear (18) are respectively sleeved at two sides of the sliding meshing sleeve (17) on the shaft.

5. The integrated two-speed electric drive axle assembly according to claim 2, wherein: the cylindrical gear mechanism is arranged in the speed reducer shell, and the cylindrical gear mechanism, the motor (1), the first half shaft (5), the second half shaft (6) and the wheel hub form a transmission chain.

6. The integrated two-speed electric drive axle assembly according to claim 2, wherein: the differential mechanism is arranged on the speed reducer shell and is connected with tires on two sides through a first half shaft (5) and a second half shaft (6) respectively.

7. The integrated two-speed electric drive axle assembly according to claim 2, wherein: and the differential mechanism is provided with a vehicle speed gear ring (8).

8. The integrated two-speed electric drive axle assembly according to claim 2, wherein: the speed sensor is arranged on the speed reducer shell.