CN207683311U - Electric vehicle with variable ratio drive system - Google Patents

Abstract

The electric vehicle with a variable speed transmission system of the present invention comprises a vehicle body and a chassis component; the chassis component comprises a dual-motor drive system and a rear axle system; the dual-motor drive system comprises a first drive motor, a second drive motor, a coupling For the differential and transmission components, there can be a large speed difference between the output ends of the two motors in this system. In addition, in the case of small power requirements, only one motor can be used for driving.

Description

Electric vehicles with variable speed drive trains

technical field

The utility model relates to the field of electric vehicles, in particular to an electric vehicle with a variable speed transmission system.

Background technique

In the existing electric vehicles, one motor is usually used as the power source. This driving method has the problem of insufficient power and is difficult to be used in electric vehicles with high power requirements. A few electric vehicles use two motors as the power source, and the two motors After power coupling, the vehicle is jointly driven forward. However, there is inevitably a speed difference between the two motors. When the speed difference is too large, the transmission efficiency will be greatly reduced.

Therefore, there is a need for a power source that can use two motors for power coupling. At the same time, there can be a large speed difference between the output ends of the two motors. In addition, when the power demand is small, only one motor is used. An electric vehicle with a variable speed transmission system for driving.

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 power source that can use two motors for power coupling, and at the same time, there can be a large speed difference between the output ends of the two motors. , In addition, in the case of small power demand, only one electric motor can be used to drive the electric vehicle with variable speed transmission system.

The electric vehicle with a variable speed transmission system of the present invention includes a vehicle body and a chassis part; the chassis part includes a dual-motor drive system and a rear axle system; the dual-motor drive system includes a first drive motor, a second drive motor, a coupling Differential and transmission assembly; the output shaft of the first driving motor is connected to the right half shaft of the coupling differential;

The transmission assembly includes a power input shaft, a transition shaft, and a power output shaft arranged in parallel; the power input shaft is connected to the output shaft of the second drive motor, and is connected to the left half shaft of the coupling differential through a clutch; The transition shaft can receive power from the power input shaft through the first power input gear pair, or receive coupling power from the coupling differential through the second power input gear pair; The power input shaft, and the first driving gear engaged with the power input shaft is controlled by the first synchronizer, and the first driven gear is fixed on the transition shaft; the second power input gear pair includes the second driving gear and is fixed on The second driven gear of the transition shaft; the second driving gear is a differential gear coupled to the differential; the transition shaft transmits power to the power output shaft through multiple sets of shift gear pairs, and the adjacent shift gear pairs A second synchronizer is provided between them;

The rear axle system includes a rear axle differential, a left wheel hub and a right wheel hub; the power output shaft transmits power to the rear axle differential through a chain drive, and distributes power to the rear axle differential through the rear axle differential said left hub and right hub;

Further, the rear axle system also includes an axle housing covering the rear axle differential and a protective tube fixed to the axle housing and covering the left wheel shaft and the right wheel shaft;

Further, the shifting gear pair is divided into two groups, namely a fast gear pair and a slow gear pair;

Further, the clutch is a friction clutch;

Further, a driving sprocket is fixed on the power output shaft; the rear axle differential is provided with a driven sprocket which is driven by a chain with the driving sprocket.

The beneficial effects of the utility model are: the electric vehicle with variable speed transmission system of the utility model can control the clutch engagement when the driving power demand is high, and the first synchronizer is separated from the driving gear of the first power input gear pair, The first power input gear pair is not transmitted, the first drive motor and the second drive motor directly input power to the left and right axle shafts of the coupling differential, and the coupling differential adopts the existing differential structure (existing The differential is composed of planetary gears, planetary gear carriers (differential case), half shaft gears, and differential gears. The differential gears are relatively fixed to the differential case), the first drive motor and the second The power input by the driving motor is coupled through the differential and then output to the differential gear; the differential gear is used as the driving gear of the second power input gear pair to transmit the power to the transition shaft, and the transition shaft and the power output shaft pass through Multiple shifting gear pairs transmit power to form multiple shifting gears. The speed difference between the two drive motors in this device can be coupled through the differential (essentially a planetary gear mechanism, which can couple the two powers) output) coupling, which improves the driving power of the tricycle. In addition, when the driving power demand of the vehicle is not high, the clutch can be disconnected; the first synchronizer controls the first power input gear pair to engage with the power input shaft, and the first power input gear The pair directly transmits the power to the transition shaft. At this time, only the second drive motor provides the driving power to save electric energy; the power of the power output shaft is transmitted to the rear axle differential through the chain transmission, and then the rear axle differential The drive distributes the power to the left wheel hub and the right wheel hub, thereby driving the entire electric vehicle to move forward.

Description of drawings

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

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

Detailed ways

Fig. 1 is the structure schematic diagram of the present utility model, as shown in the figure, the electric car with variable speed transmission system of the present embodiment includes vehicle body and chassis parts; Said chassis parts include double motor drive system and rear axle system; Said said The dual-motor drive system includes a first drive motor 8, a second drive motor 1, a coupling differential 10 and a transmission assembly; the output shaft of the first drive motor 8 is connected to the right half of the coupling differential 10 Shaft; the transmission assembly includes a power input shaft 14, a transition shaft 2 and a power output shaft 6 arranged in parallel; the power input shaft 14 is transmission connected to the output shaft of the second drive motor 1, and is connected to the coupling through a clutch 11 transmission The left half shaft of the differential 10; the transition shaft 2 can receive the power from the power input shaft 14 through the first power input gear pair 13, or receive the coupling power from the coupling differential 10 through the second power input gear pair ; The first power input gear pair 13 includes a first driving gear that is loosely sleeved on the power input shaft 14 and is controlled to engage with the power input shaft 14 through the first synchronizer 12 , and a first driven gear that is fixed on the transition shaft 2 Gear; the second power input gear pair includes a second driving gear and a second driven gear fixed to the transition shaft 2; the second driving gear is the differential gear 9 coupled to the differential 10; the transition The shaft 2 transmits the power to the power output shaft 6 through multiple shift gear pairs, and the second synchronizer 4 is arranged between adjacent shift gear pairs;

The rear axle system includes a rear axle differential 19, a left wheel hub 22 and a right wheel hub 17; the power output shaft transmits power to the rear axle differential 19 through a chain drive, and passes through the rear axle differential 19 distribute power to the left wheel hub 22 and the right wheel hub 17;

When the driving power demand is high, the clutch 11 can be controlled to engage, and the first synchronizer 12 is separated from the driving gear of the first power input gear pair 13, so that the first power input gear pair 13 does not transmit, and the first drive motor 8 and The second drive motor 1 directly inputs power to the left and right axle shafts of the coupling differential 10 respectively, and the coupling differential 10 adopts an existing differential structure (the existing differential is composed of a planetary gear, a planetary carrier (differential) Transmission case), half shaft gear, and differential gear 9 and other parts, the differential gear 9 and the differential case are relatively fixed), the power input by the first drive motor 8 and the second drive motor 1 passes through the differential After the transmission is coupled, it is output to the differential gear 9; the differential gear 9 is used as the driving gear of the second power input gear pair to transmit the power to the transition shaft 2, and the transition shaft 2 and the power output shaft 6 are connected through a plurality of gears. The gear pair transmits power to form multiple shifting gears. The speed difference between the two driving motors in this device can be coupled through the differential (essentially a planetary gear mechanism, which can couple the two powers and then output them). , the driving power of the tricycle is improved. In addition, when the vehicle driving power demand is not high, the clutch 11 can be disconnected; the first synchronizer 12 controls the first power input gear pair 13 to engage with the power input shaft 14, and the first power input gear The auxiliary 13 directly transmits the power to the transition shaft 2, at this time, only the second driving motor 1 provides the driving power to save electric energy.

In this embodiment, the rear axle system further includes an axle housing 21 covering the rear axle differential 19 and a protective tube 18 fixed to the axle housing 21 and covering the left axle 15 and the right axle 16, The axle housing 21 can be fixed on the vehicle frame, and the rear axle differential 19 is protected through the axle housing 21. The protection tube 18 is used to protect the left wheel shaft 15 and the right wheel shaft 16, and a bearing can be arranged between the wheel shaft and the protection tube 18. , to increase the support stiffness of the axle.

In the present embodiment, the shifting gear pairs are two groups, namely the fast gear pair 5 and the slow gear pair 3; the driving gears of the fast gear pair 5 and the slow gear pair 3 are fixed on the transition shaft 2, from The driven gear is idly sleeved on the power output shaft 6 , and one of the driven gears is selected to engage with the power output shaft 6 through the axial movement of the second synchronizer 4 .

In this embodiment, the clutch 11 is an existing friction clutch 11 .

In the present embodiment, the driving sprocket 7 is fixed on the power output shaft 6; Realize the long-distance transmission between the rear axle differential 19 and the coupling differential, wherein the driven sprocket 20 is fixed on the casing of the coupling differential, and the casing is also used as the planetary wheel of the rear axle differential 19 shelf.

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 purpose and scope of the technical solutions of the utility model shall be covered by the claims of the utility model.

Claims (5)

1. An electric vehicle with a variable speed drive system, characterized in that: it comprises a vehicle body and a chassis component; the chassis component comprises a dual-motor drive system and a rear axle system; the dual-motor drive system comprises a first drive motor, a second A drive motor, a coupling differential and a speed change assembly; the output shaft of the first drive motor is drive-connected to the right half shaft of the coupling differential; The transmission assembly includes a power input shaft, a transition shaft, and a power output shaft arranged in parallel; the power input shaft is connected to the output shaft of the second drive motor, and is connected to the left half shaft of the coupling differential through a clutch; The transition shaft can receive power from the power input shaft through the first power input gear pair, or receive coupling power from the coupling differential through the second power input gear pair; The power input shaft, and the first driving gear engaged with the power input shaft is controlled by the first synchronizer, and the first driven gear is fixed on the transition shaft; the second power input gear pair includes the second driving gear and is fixed on The second driven gear of the transition shaft; the second driving gear is a differential gear coupled to the differential; the transition shaft transmits power to the power output shaft through multiple sets of shift gear pairs, and the adjacent shift gear pairs A second synchronizer is provided between them; The rear axle system includes a rear axle differential, a left wheel hub and a right wheel hub; the power output shaft transmits power to the rear axle differential through a chain drive, and distributes power to the rear axle differential through the rear axle differential The left hub and the right hub. 2. The electric vehicle with variable speed transmission system according to claim 1, characterized in that: the rear axle system also includes an axle housing that is covered on the rear axle differential and is fixed and covered with the axle housing Protective tubes outside the left and right axles. 3. The electric vehicle with variable speed transmission system according to claim 2, characterized in that: the shift gear pairs are divided into two groups, namely a fast gear pair and a slow gear pair. 4. The electric vehicle with variable speed transmission system according to claim 3, wherein the clutch is a friction clutch. 5. The electric vehicle with variable speed transmission system according to claim 4, characterized in that: said power output shaft is fixed with a drive sprocket; said rear axle differential is provided with said drive sprocket through a chain Driven sprocket.