CN204870561U - Planetary gear drive formula rear axle assembly - Google Patents

Abstract

The planetary gear driven rear axle assembly of the present utility model includes a left axle tube, a right axle tube, a first input end, a second input end, a planetary gear assembly, a transmission and an output differential; the first input end and The second input end is connected to the sun gear and the outer ring gear of the planetary gear assembly respectively, and the power is transmitted to the transmission and the output differential in turn through the planet carrier of the planetary gear assembly. Therefore, the planetary gear of the present utility model The driven rear axle assembly can use two power devices as power, and at the same time, there may be a speed difference between the output shafts of the two power devices, thereby greatly improving the power performance of the electric vehicle.

Description

Planetary gear driven rear axle assembly

technical field

The utility model relates to the field of motor vehicle parts, in particular to a planetary gear driven rear axle assembly.

Background technique

Motor vehicles are divided into electric vehicles (two-wheel, three-wheel and electric vehicles) and vehicles powered by engines. Electric vehicles are powered by on-board power batteries to drive electric vehicles. Because electric vehicles are energy-saving, environmentally friendly and portable, and The cost of use is low, and more and more attention has been paid to it. However, because the power and output torque of the motor are inferior to those of the engine, in order to solve the problem of insufficient power of the electric vehicle, more small cars adopt a hybrid structure, using gasoline drive and electric drive to reach a certain speed. In the past, pure electric vehicles, which were only driven by a power unit and only used a power unit as power, were difficult to apply to vehicles with high cost requirements such as two-wheeled and three-wheeled vehicles due to their high cost and insufficient power.

Therefore, there is a need for a planetary gear-driven rear axle assembly that can use two power devices as power, and at the same time, there may be a speed difference between the output shafts of the two power devices, thereby greatly improving the power performance of the electric vehicle.

Utility model content

In view of this, the purpose of this utility model is to overcome the defects in the prior art, to provide a kind of power device that can use two power devices as power, and at the same time, there can be a difference in speed between the output shafts of the two power devices, thereby greatly improving the motor speed. The planetary gear driven rear axle assembly for the dynamic performance of the car.

The planetary gear driven rear axle assembly of the present utility model includes a left axle tube, a right axle tube, a first input end, a second input end, a planetary gear assembly, a transmission and an output differential; the first input end and The second input end is connected to the sun gear and the outer ring gear of the planetary gear assembly respectively, and transmits the power to the transmission and the output differential in turn through the planetary carrier of the planetary gear assembly; the left side of the output differential The half-shaft and the right half-shaft are respectively rotationally matched and supported on the left axle tube and the right axle tube and output power to the left wheel shaft and the right wheel shaft of the vehicle;

Further, the planetary gear assembly is a drive differential; the first input end and the second input end are drive-connected to the left half shaft and the right half shaft of the drive differential respectively and are connected to the drive differential through the drive differential. PTO. Further, the outer ends of the left half-shaft and the right half-shaft of the output differential are provided with ball cage universal joints, and are connected to the left wheel shaft and the right wheel shaft of the vehicle through the ball cage universal joints;

Further, the transmission includes a drive shaft and a driven shaft, the drive shaft is in transmission connection with the output end of the drive differential, and the drive shaft is equipped with a fast gear drive gear and a slow gear drive gear in a manner that can rotate around the axis, and the driven shaft The upper transmission is provided with a fast gear driven gear meshing with the fast gear driving gear and a slow gear driven gear meshing with the slow gear driving gear, and the driving shaft is equipped with a gear shift adapter in the manner of axial sliding and circumferential transmission;

Further, the drive differential includes a drive differential housing and a drive differential gear assembly, and the drive differential housing is provided with a power output gear integrally formed with it;

Further, the planetary gear shaft of the drive differential passes through the drive differential gear housing and is fixed to the drive differential gear housing by fixing pins radially passing through the planetary gear shafts;

Further, the axial ends of the drive differential housing extend outward to form a support tube for rotationally matching with the extended shaft section of the left side gear and the extended shaft section of the right side gear;

Further, a drive differential bearing is arranged outside the support tube;

Further, the drive differential housing is an integral structure, and the drive differential housing is provided with installation through holes for installing the drive differential gear assembly;

Further, an intermediate shaft is arranged between the drive differential and the transmission, and the intermediate shaft is equipped with a reduction driving gear and an intermediate gear meshed with the power output gear, and the driving shaft is equipped with a reduction gear that meshes with the reduction driving gear. moving gears.

The beneficial effects of the utility model are: the planetary gear driven rear axle assembly of the utility model, the power is supplied by two power devices at the same time, a planetary gear assembly is arranged between the output shafts of the two power devices, and the planetary gear assembly After combining the power of the two power devices, the power is output. The planetary gear assembly can solve the problem that the output shafts of the two power devices are out of sync. After the planetary gear assembly combines the power of the two power devices, different speeds can be obtained through the transmission. combined torque, and finally output the power through the output differential. Therefore, the planetary gear driven rear axle assembly of the present invention can use two power devices to output simultaneously as power, and allow the output shafts of the two power devices to have a rotational speed difference, thereby improving the output power and torque of the electric vehicle, and finally greatly improving the dynamic performance of the pure electric vehicle. At the same time, the rear axle drive assembly of the utility model cancels the traditional rear axle structure and can be directly installed on the vehicle suspension. The structure of the vehicle transmission system is greatly simplified.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model will be further described:

Fig. 1 is the structural representation of the utility model.

Detailed ways

Fig. 1 is a schematic structural view of the present utility model, as shown in the figure, the planetary gear driven rear axle assembly of the present embodiment includes a left axle tube, a right axle tube, a first input end, a second input end, and a planetary gear assembly , a transmission and an output differential 16; the first input end and the second input end are connected to the sun gear and the outer ring gear of the planetary gear assembly respectively, and the power is sequentially transmitted to the planetary gear assembly through the planet carrier The transmission and the output differential 16; the left half-shaft and the right half-shaft of the output differential 16 respectively rotate and cooperate with corresponding support on the left axle tube and the right axle tube and output the power to the left axle and right axle of the vehicle Axle, rear axle drive assembly of present embodiment, vehicle power is supplied by two power units simultaneously, and the planetary gear assembly that is provided with between the output shafts of two power units can combine the power of two power units and combine power Output, the planetary gear assembly can solve the problem of out-of-synchronization of the output shaft speeds of the two power devices. After the planetary gear assembly combines the power of the two power devices, different speeds and torques are obtained through the transmission, and finally through the output differential 16 Therefore, the planetary gear driven rear axle assembly of the present utility model can use two power devices to output simultaneously as power, and allow the output shafts of the two power devices to have a speed difference, thereby improving the output power of the electric vehicle and At the same time, the rear axle drive assembly of this embodiment cancels the traditional rear axle structure and can be directly installed on the vehicle suspension, which greatly simplifies the structure of the vehicle transmission system.

In this embodiment, the planetary gear assembly is a drive differential 5, through which the first input end and the second input end synthesize power and output it. The drive differential 5 has a compact and reliable structure and can withstand In this embodiment, the first input end and the second input end are connected to the left half-shaft and the right half-shaft of the driving differential 5 respectively, and the power is output to the vehicle through the output gear of the differential 5 transmission system.

In this embodiment, the outer ends of the left half shaft and the right half shaft of the output differential 16 are equipped with universal joints and are connected to the left wheel shaft and the right wheel shaft of the vehicle through the universal joints. The joint adopts a spherical cage universal joint, which is a common constant velocity universal joint. The left half shaft and right half shaft of the output differential 16 are connected with the left wheel shaft and the right half shaft of the vehicle through the spherical cage universal joint. The transmission connection of the right wheel shaft realizes power output to the left wheel shaft and the right wheel shaft.

In the present embodiment, the transmission includes a driving shaft 13 and a driven shaft 17, the driving shaft 13 is in transmission connection with the output end of the drive differential, and the driving shaft 13 is equipped with a fast gear driving gear 14 and Slow gear driving gear 20, driven shaft 17 is provided with fast gear driven gear 15 meshing with fast gear driving gear 14 and slow gear driven gear 18 meshing with slow gear driving gear 20. The mode of axial sliding circumferential direction transmission is matched with a gear shift adapter 19, and the driving shaft 13 is driven by the meshing of the fast gear driving gear 14 and the fast gear driven gear 15 or the meshing of the slow gear driving gear 20 and the slow gear driven gear 18. The power is transmitted to the driven shaft 17 to obtain different transmission speeds and power. The adapter 19 is arranged between the fast gear driving gear 14 and the slow gear driving gear 20, and the fast gear can be activated by moving the adapter 19 in the axial direction. The driving gear 14 or the slow gear driving gear 20 are in transmission cooperation with the driving shaft 13, thereby realizing gear shifting.

In this embodiment, the drive differential includes a drive differential case 5 and a drive differential gear assembly, the drive differential case 5 is provided with a power output gear 7 integrally formed with it, and the differential The gear assembly belongs to the existing structure, including planetary gears, left side shaft gears and right side shaft gears, which will not be repeated here. The power output gear 7 on the drive differential housing 5 can be transmitted with existing vehicles such as transmissions. The system cooperates, so that the power of the two power devices is combined and then output. The power output gear 7 is integrally formed with the drive differential case 5, which can greatly increase the maximum bearing load of the differential, and is conducive to improving the compactness of the differential. sex. In this embodiment, the planetary gear shaft of the drive differential passes through the drive differential housing and is fixed to the drive differential housing by a fixing pin radially passing through the planetary gear shaft. Therefore, the output shaft from the power device Power will be transmitted through the drive differential gear assembly to the drive differential case output.

In this embodiment, the axial ends of the drive differential case 5 extend outward to form a support tube 4 for rotationally matching with the extended shaft section of the left side gear and the extended shaft section of the right side gear, supporting The inner wall of the tube 4 is slidingly fitted with the extension shaft section of the side gear, and one end of the left and right side shafts is connected to the extension shaft section of the side gear, and the other end extends out of the support tube 4. The support rigidity of the extended shaft section is conducive to ensuring the coaxiality of the left and right half shafts.

In this embodiment, the support tube 4 is provided with a drive differential bearing 3 outside, and the drive differential bearing 3 is provided with two support tubes whose inner rings are respectively matched with the drive differential housing 5 sides. 4, since the drive differential housing 5 will rotate around the axial direction at high speed to output power during operation, the drive differential bearing 3 can further improve the coaxiality of the left and right half shafts, and there will be no gap between the kinematic pairs. Eccentric wear is beneficial to prolong the service life of the differential and the entire reducer.

In this embodiment, the drive differential housing 5 is an integral structure and the drive differential housing 5 is provided with installation holes for installing the drive differential gear assembly, and the differential housing adopts an integral structure. Type structure, better coaxiality can be determined during processing, so it is easy to ensure coaxiality in the installation process, just install it directly, and improve installation efficiency; because it is an integral structure, there will be no coaxiality problem in long-term use, There will be no eccentric wear between the kinematic pairs, which is beneficial to prolong the service life of the differential and the entire reducer, and reduce the cost of use; because there is no eccentric wear, the energy consumption is greatly reduced, which is beneficial to prolong the mileage of the electric vehicle after charging.

In this embodiment, an intermediate shaft 11 is provided between the drive differential and the transmission, and the intermediate shaft 11 is equipped with a reduction driving gear 10 and an intermediate gear meshed with the power output gear 7. The driving shaft 13 is equipped with a The reduction driven gear 12 meshed with the reduction driving gear 10 needs to be output through multi-stage reduction due to the high speed of the power plant, and a large reduction ratio can be provided between the reduction driving gear 10 and the reduction driven gear 12 to realize After decelerating and increasing torque, the power is transmitted to the transmission.

Finally, it is noted that the above embodiments are only used to illustrate the technical solutions of the present utility model without limitation. Although the utility model has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the utility model can be Modifications or equivalent replacements of the technical solutions without departing from the spirit and scope of the technical solutions of the utility model shall be covered by the claims of the utility model.

Claims (10)

1. A planetary gear driven rear axle assembly, characterized in that it comprises a left axle tube, a right axle tube, a first input end, a second input end, a planetary gear assembly, a speed changer and an output differential; the first The first input end and the second input end are connected to the sun gear and the outer ring gear of the planetary gear assembly respectively, and the power is sequentially transmitted to the transmission and the output differential through the planet carrier of the planetary gear assembly; the output differential The left half shaft and the right half shaft of the gearbox are rotated and matched correspondingly supported on the left axle tube and the right axle tube, and the power is output to the left wheel shaft and the right wheel shaft of the vehicle. 2. The planetary gear driven rear axle assembly according to claim 1, characterized in that: the planetary gear assembly is a drive differential; the first input end and the second input end are respectively drive connected to the Drives the left and right half shafts of the differential and outputs power through the drive differential. 3. The planetary gear driven rear axle assembly according to claim 2, characterized in that: the outer ends of the left half shaft and the right half shaft of the output differential are provided with universal joints and pass through the universal joints It is connected with the left and right wheel shafts of the vehicle. 4. The planetary gear driven rear axle assembly according to claim 2, characterized in that: the transmission includes a drive shaft and a driven shaft, the drive shaft is in transmission connection with the output end of the drive differential and is mounted on the drive shaft A fast gear driving gear and a slow gear driving gear can be rotated around the axis, and the driven shaft is provided with a fast gear driven gear meshed with the fast gear driving gear and a slow gear driven gear meshed with the slow gear. The slow gear driven gear, the driving shaft is fitted with a shift adapter in the manner of transmission in the axial sliding circumferential direction. 5. The planetary gear driven rear axle assembly according to claim 2, wherein the drive differential comprises a drive differential case and a drive differential gear assembly, the drive differential case The body is provided with a power output gear integrally formed with it. 6. The planetary gear driven rear axle assembly according to claim 2, characterized in that: the planetary shaft of the driving differential passes through the housing of the driving differential and passes through the fixed pin radially passing through the planetary shaft Fixed to the drive differential case. 7. The planetary gear driven rear axle assembly according to claim 4, characterized in that: the axial ends of the drive differential housing extend outward to form an extended shaft section for connecting with the left side gear and The extended shaft section of the right side gear rotates with the supporting tube. 8 . The planetary gear driven rear axle assembly according to claim 5 , wherein a drive differential bearing is arranged outside the support tube. 9. The planetary gear driven rear axle assembly according to claim 4, characterized in that: the drive differential case is an integral structure and the drive differential case is provided with a The mounting holes of the gear assembly. 10. The planetary gear driven rear axle assembly according to claim 3, characterized in that: an intermediate shaft is provided between the drive differential and the transmission, and the intermediate shaft is driven with a reduction drive gear and The intermediate gear meshed with the power output gear, and the drive shaft is driven with a reduction driven gear meshed with the reduction driving gear.