A sunken wheel-side motor drive bridge

Abstract

The present invention discloses a sunken wheel-side motor drive axle, which is characterized in that the wheel-side motor drive axle includes an axle beam assembly, and also includes two drive motor assemblies, two reducer assemblies and two wheel hub assemblies respectively arranged at the left and right ends of the axle beam assembly; each of the motor drive assemblies is symmetrically arranged at the bottom of the left and right ends of the axle beam assembly; and the drive motor assembly transmits power to the reducer assembly, and the reducer assembly drives the wheel hub assembly to rotate. The wheel-side electric drive axle disclosed in the above scheme arranges the drive motor at the bottom of the axle beam assembly, which reduces the space occupied, increases the width of the new energy commercial bus compartment channel, and improves passenger comfort; and through the three-stage reduction transmission, the transmission speed ratio is increased, while ensuring the same wheel end drive torque, the demand for the output torque of the drive motor is reduced, and the size of the drive motor can also be effectively reduced.

Description

Technical Field

[0001] The present application relates to the field of new energy vehicles, and in particular to a sunken wheel-side motor drive axle. Background Art

[0002] As oil resources are becoming increasingly scarce and air pollution is becoming more severe, society is calling for new energy vehicles, including pure electric, hybrid, fuel cell and other forms of vehicles. The emergence of new energy vehicles has greatly reduced dependence on oil and air pollution. Compared with traditional internal combustion engine vehicles, new energy vehicles have undergone tremendous changes in both the vehicle layout structure and the drive system assembly due to the different energy supply form. The drive system assembly is crucial to the vehicle, not only assuming the load-bearing and driving functions, but also directly determining the safety and comfort performance of the vehicle.

[0003] The width of the aisle in the current new energy commercial buses that use wheel-side motor drive axles is determined by the distance between the end faces of the left and right drive motors of the wheel-side motor drive axles. However, in order to ensure a larger driving torque, the drive motors are made larger, which makes the distance between the end faces of the two drive motors of the wheel-side motor drive axles smaller, which in turn leads to a smaller width of the bus aisle and low passenger comfort. Summary of the invention

[0004] In view of the above problems, the present application proposes a sunken wheel-side motor drive axle to solve or partially solve the above problems.

[0005] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0006] On one hand, the present invention provides a sunken wheel-side motor drive axle, the wheel-side motor drive axle comprising an axle beam assembly, and also comprising two drive motor assemblies, two reducer assemblies and two wheel hub assemblies respectively arranged at the left and right ends of the axle beam assembly;

[0007] Each of the motor drive assemblies is symmetrically arranged at the bottom of the left and right ends of the axle beam assembly;

[0008] The driving motor assembly transmits power to the reducer assembly, and the reducer assembly drives the wheel hub assembly to rotate.

[0009] Furthermore, the drive motor assembly includes an oil-cooled motor with a small diameter, high power density and high speed.

[0010] Furthermore, the reducer assembly is provided with a brake air chamber, which cooperates with the brake disc and limits the width of the carriage passage.

[0011] Furthermore, the brake disc is arranged on the inner side of the wheel hub assembly.

[0012] Furthermore, the reducer assembly includes two primary reducer assemblies, two secondary reducer assemblies and two tertiary reducer assemblies, and each of the primary reducer assemblies, the secondary reducer assemblies and the tertiary reducer assemblies are arranged symmetrically on the left and right.

[0013] Furthermore, the output shaft of the drive motor assembly is connected to the driving gear of the primary reducer assembly through a spline, the driven gear output shaft of the primary reducer assembly is connected to the driving gear of the secondary reducer assembly, and the driven gear of the secondary reducer assembly transmits power to the input end of the tertiary reducer assembly; the secondary reducer assembly includes a driving gear, an intermediate shaft and a driven gear, and the intermediate shaft is respectively meshed with the driving gear and the driven gear.

[0014] Furthermore, the driven gear of the secondary reducer assembly and the driving gear of the secondary reducer assembly are eccentrically arranged.

[0015] Furthermore, the input end and the output end of the three-stage reducer are located on the same side, and the three-stage reducer includes a sun gear, a planetary gear, and a ring gear. The sun gear is driven by the driven gear of the secondary reducer assembly, the planetary gears are meshed with the sun gear and are fixed on the planetary carrier, the planetary gears are meshed with the ring gear, and the ring gear is meshed with the gear plate on the hub assembly, thereby driving the hub assembly to rotate.

[0016] Furthermore, the drive motor assembly, the primary reducer assembly and the secondary reducer assembly are lubricated by a spray-condensing integrated cooling lubrication system.

[0017] Another aspect of the present invention provides a new energy vehicle, comprising any of the above-mentioned sunken wheel-side motor drive axles.

[0018] The above-mentioned sunken wheel-side motor drive axle has the following advantages:

[0019] The present invention sets the drive motor assembly at the bottom of the axle crossbeam assembly and uses a multi-stage reducer to reduce the drive motor torque output requirement while ensuring the same wheel-side drive torque, thereby effectively reducing the size of the drive motor and the space occupied by the drive motor assembly, making the brake air chamber boundary the determining factor for limiting the width of the carriage passage. Therefore, the wheel-side motor drive axle provided by the present invention can effectively increase the width of the carriage passage and improve the comfort of passengers. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Various other advantages and benefits will become apparent to those skilled in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only used to illustrate the preferred embodiments and are not to be considered as limiting the present application. In the accompanying drawings:

[0021] Figure 1 A top view of a sunken wheel-side motor drive axle in one embodiment of the present application is shown;

[0022] Figure 2 A front view of a sunken wheel-side motor drive axle in one embodiment of the present application is shown.

[0023] The meanings of the reference numerals in the figure are as follows: 1. left three-stage reducer assembly, 2. left wheel hub assembly, 3. left brake disc, 4. left two-stage reducer assembly, 5. left brake air chamber, 6. left one-stage reducer assembly, 7. left drive motor assembly, 8. axle beam assembly, 9. right three-stage reducer assembly, 10. right wheel hub assembly, 11. right brake disc, 12. right two-stage reducer assembly, 13. right brake air chamber, 14. right one-stage reducer assembly, 15. right drive motor assembly, A. the boundary between the left and right symmetrically arranged brake air chambers. DETAILED DESCRIPTION

[0024] The exemplary embodiments of the present application will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present application are shown in the accompanying drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present application and to fully convey the scope of the present application to those skilled in the art.

[0025] Example 1

[0026] Embodiment 1 of the present invention discloses a sunken wheel-side motor drive bridge, which includes a vehicle axle beam assembly 8, a drive motor assembly, a reducer assembly and a wheel hub assembly; the structure of the wheel-side motor drive bridge is shown in FIG. Figure 1 and Figure 2 .

[0027] The drive motor assembly includes a left drive motor assembly 7 and a right drive motor assembly 15, which are symmetrically arranged at the bottom of the left and right ends of the axle beam assembly 8. By arranging the drive motor assembly at the bottom of the axle beam assembly 8, the boundary A between the two symmetrically arranged brake air chambers on the left and right sides becomes the determining factor for limiting the width of the carriage passage, thereby increasing the width of the carriage passage.

[0028] In addition, the driving motor assembly transmits power to the reducer assembly, and the reducer assembly drives the wheel hub assembly to rotate. The reducer includes a left reducer assembly and a right reducer assembly, and the wheel hub assembly includes a left wheel hub assembly 2 and a right wheel hub assembly 10. The left and right reducer assemblies and the left and right wheel hub assemblies are arranged symmetrically. The left driving motor assembly 7 transmits power to the left reducer assembly, and then the left reducer assembly drives the left wheel hub assembly 2; the right driving motor assembly 15 transmits power to the right reducer assembly, and then the right reducer assembly drives the right wheel hub assembly 10.

[0029] In a preferred embodiment, the drive motor assembly is an oil-cooled motor with a small diameter, high power density and high speed, thereby ensuring a large torque output and reducing the space occupied by the drive motor assembly. Of course, according to specific needs, the drive motor assembly can also use other small-volume, high-power motors, and is not limited to oil-cooled motors.

[0030] In one embodiment, a brake air chamber is provided on the retarder assembly, and the brake air chamber includes a left brake air chamber 5 and a right brake air chamber 13. The left brake air chamber 5 is provided on the left retarder assembly, and the right brake air chamber 13 is provided on the right retarder assembly. The brake air chamber cooperates with the brake disc, and the width of the carriage passage is limited by the brake air chamber. Figure 2 It can be seen that the boundary A between the left and right brake air chambers becomes the determining factor limiting the width of the carriage passage.

[0031] In one embodiment, the brake disc is arranged on the inner side of the wheel hub assembly, and the brake disc includes a left brake disc 3 and a right brake disc 11. The left and right brake discs are symmetrically arranged and are respectively arranged on the inner sides of the left and right wheel hub assemblies for braking the left and right wheel hub assemblies.

[0032] In a preferred embodiment, the reducer assembly includes two left and right primary reducer assemblies, two left and right secondary reducer assemblies, and two left and right tertiary reducer assemblies, and each primary reducer assembly, secondary reducer assembly, and tertiary reducer assembly is symmetrically arranged on the left and right. The present invention realizes a three-stage reduction transmission by arranging a primary reducer, a secondary reducer, and a tertiary reducer, which can effectively increase the transmission speed ratio, and while ensuring the same wheel-side driving torque, can reduce the torque output requirement of the drive motor, thereby effectively reducing the size of the drive motor and reducing its space occupation, thereby further increasing the width of the carriage passage.

[0033] In one embodiment, the output shaft of the driving motor assembly is connected to the driving gear of the primary reducer assembly through a spline, the driven gear output shaft of the primary reducer assembly is connected to the driving gear of the secondary reducer assembly, and the driven gear of the secondary reducer assembly transmits power to the input end of the tertiary reducer assembly. The left driving motor assembly 7 transmits power to the left tertiary reduction assembly 1 through a power transmission process, and the right driving motor assembly 15 transmits power to the right tertiary reduction assembly 9 through a power transmission process. The motor output shaft of the driving motor assembly is connected to the primary reducer driving gear through an external spline to transmit the driving motor power to the primary reducer assembly; the output shaft of the primary reducer driven gear is connected to the secondary reducer driving gear to transmit the power to the secondary reducer assembly; finally, the power is transmitted to the tertiary reducer through the secondary reducer intermediate shaft and the driven gear output shaft eccentrically arranged with the driving gear.

[0034] The secondary reducer assembly includes a driving gear, an intermediate shaft and a driven gear. The intermediate shaft meshes with the driving gear and the driven gear respectively. The driving gear transmits power to the driven gear through the intermediate shaft, which can effectively increase the transmission speed ratio.

[0035] In one embodiment, the driven gear of the secondary reducer assembly is eccentrically arranged with respect to the driving gear of the secondary reducer assembly. When the output shaft of the driven gear of the primary reducer assembly drives the driving gear of the secondary reducer assembly to rotate, the driven gear of the secondary reducer assembly also rotates accordingly.

[0036] In one embodiment, the input end and the output end of the three-stage reducer are located on the same side. The three-stage reducer includes a sun gear, a planetary gear, and a ring gear. The sun gear is driven by the driven gear of the secondary reducer assembly. The planetary gears are meshed with the sun gear and fixed on the planetary carrier. The planetary gears are meshed with the ring gear, and the ring gear is meshed with the gear plate on the hub assembly, thereby driving the hub assembly to rotate. There are two sets of the above-mentioned driving structures, which are symmetrically arranged on the left and right.

[0037] In one embodiment, the drive motor assembly, the first-stage reducer assembly and the second-stage reducer assembly are lubricated by a spray-condensing integrated cooling and lubrication system, thereby enhancing the cooling and lubrication effect and improving the cooling and lubrication efficiency. Similarly, other lubrication systems with the same effect as the spray-condensing integrated cooling and lubrication system can also be selected for lubrication.

[0038] In summary, the present invention discloses a sunken wheel-side motor drive axle, which includes an axle beam assembly, a drive motor assembly, a reducer assembly and a wheel hub assembly; the drive motor assembly includes a left drive motor assembly and a right drive motor assembly, and the left drive motor assembly and the right drive motor assembly are symmetrically arranged at the bottom of the left and right ends of the axle beam assembly respectively; the drive motor assembly transmits power to the reducer assembly, and the reducer assembly drives the wheel hub assembly to rotate. The wheel-side electric drive axle in the present invention increases the transmission ratio through a three-stage reduction transmission, while ensuring the same wheel-end drive torque, it reduces the demand for the output torque of the drive motor, and can effectively reduce the size of the drive motor, and the drive motor is arranged at the bottom of the axle beam assembly, which reduces the space occupied, increases the width of the compartment channel of the new energy commercial bus, and improves passenger comfort.

[0039] Example 2

[0040] An embodiment of the present invention further discloses a new energy vehicle, comprising any of the above-mentioned sunken wheel-side motor drive axles.

[0041] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of changes, replacements or improvements within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

[0042] In the description provided herein, a large number of specific details are described. However, it is understood that the embodiments of the present application can be practiced without these specific details. In some instances, well-known methods, structures and techniques are not shown in detail so as not to obscure the understanding of this description.

Claims

1. A sunken wheel-side motor drive axle, characterized in that: The wheel-side motor drive axle includes an axle beam assembly, and also includes two drive motor assemblies, two reducer assemblies and two wheel hub assemblies respectively arranged at the left and right ends of the axle beam assembly; The reducer assembly is provided with a brake air chamber, which cooperates with a brake disc; each motor drive assembly is symmetrically arranged at the bottom of the left and right ends of the axle beam assembly, so that the boundary between the two symmetrically arranged brake air chambers on the left and right becomes the determining factor for limiting the width of the carriage passage; The driving motor assembly transmits power to the reducer assembly, and the reducer assembly drives the wheel hub assembly to rotate; The drive motor assembly includes an oil-cooled motor with a small diameter, high power density and high speed; The brake disc is arranged on the inner side of the wheel hub assembly; The reducer assembly includes two primary reducer assemblies, two secondary reducer assemblies and two tertiary reducer assemblies, and each of the primary reducer assemblies, the secondary reducer assemblies and the tertiary reducer assemblies are arranged symmetrically; The output shaft of the driving motor assembly is connected to the driving gear of the primary reducer assembly through a spline, the driven gear output shaft of the primary reducer assembly is connected to the driving gear of the secondary reducer assembly, and the driven gear of the secondary reducer assembly transmits power to the input end of the tertiary reducer assembly; The secondary reducer assembly comprises a driving gear, an intermediate shaft and a driven gear, wherein the intermediate shaft is respectively meshed with the driving gear and the driven gear; The driven gear of the secondary reducer assembly and the driving gear of the secondary reducer assembly are eccentrically arranged; The input end and the output end of the three-stage reducer are located on the same side. The three-stage reducer includes a sun gear, a planetary gear, and a ring gear. The sun gear is driven by the driven gear of the two-stage reducer assembly. The planetary gear is meshed with the sun gear and fixed on the planet carrier. The planetary gear is meshed with the ring gear, and the ring gear is meshed with the gear plate on the hub assembly, thereby driving the hub assembly to rotate. The drive motor assembly, the primary reducer assembly and the secondary reducer assembly are lubricated by a spray-condensing integrated cooling and lubrication system.

2. A new energy vehicle, comprising the sunken wheel-side motor drive axle as described in claim 1.

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