CN206551871U - Electric car drives back axle - Google Patents

Abstract

The utility model discloses an electric vehicle driving rear axle, relates to the field of electric vehicle accessories, in particular to an electric vehicle driving rear axle. The drive rear axle of the electric vehicle adopts a transmission structure of a motor, a primary reducer, and a differential. The motor is arranged perpendicular to the half shaft of the electric vehicle. Extruded, the motor and the differential are connected through the first-stage reducer, the center of gravity of the first-stage reducer and the differential is closer, and the transmission effect is more stable. The electric vehicle driven rear axle provided by the utility model shortens the transmission chain, improves the transmission efficiency, and makes the structure more compact. After the product is formed, it can be directly applied to the electric vehicle. While ensuring driving safety, the power of the motor can be fully utilized to achieve The effect of energy saving and environmental protection.

Description

Electric vehicle drive rear axle

technical field

The utility model relates to the field of electric vehicle accessories, in particular to an electric vehicle driving rear axle.

Background technique

Electric vehicles use vehicle-mounted power batteries as the power source to drive vehicles. Electric vehicles are more and more valued because they are energy-saving, environmentally friendly, portable, and have low operating costs.

The existing electric vehicle rear drive axle mostly adopts the transmission structure of motor, secondary reducer and differential, the transmission chain is long, and the structural layout is not compact enough, which makes the transmission efficiency of the whole vehicle low, and is not suitable for the use of miniature electric vehicles.

Therefore, it is necessary to improve the existing electric vehicle drive rear axle, adopt a first-stage reducer, and cold-extrude the main and driven gear shafts of the first-stage reducer with a low number of teeth to improve the transmission efficiency and make the structure more compact.

Contents of the invention

The purpose of this utility model is in order to solve the problems referred to above, has designed a kind of electric vehicle driving rear axle. The specific design scheme is:

An electric vehicle driven rear axle, mainly comprising: a motor and a reduction box, the motor and the reduction box are connected through a motor output gear shaft, and the motor output gear shaft passes through the reduction box and is connected with a first-stage driven gear , the first-stage driven gear is connected to the differential case through bolts, a rear axle case cover is connected below the reduction box, and a drive axle case is arranged between the rear axle case cover and the reduction box, so The number of the drive axle housings is two respectively located on the left and right sides of the rear axle housing cover, the upper end of the drive axle housing is connected with the reduction box through bolts, and the lower end of the drive axle housing is connected with the said reduction box through bolts. The rear axle housing cover is connected, and a driving half shaft runs through the drive axle housing, and a side gear is fixed on the inner top of the reduction box, and the driving half shaft is connected with the planetary gear through the side gear.

The motor is connected to the differential through a primary reducer, and the primary and driven gears of the primary reducer are the motor output gear shaft and the primary driven gear respectively.

Both the motor output gear shaft and the first-stage driven gear are bevel gears, the axis of the motor output gear shaft is perpendicular to the axis of the driving half shaft, and the center of gravity of the motor shaft and the first-stage driven gear is relatively close.

Both the motor output gear shaft and the primary driven gear are high-strength bevel gears processed by cold extrusion, and the transmission ratio is 12.

The beneficial effects of the utility model are:

The electric vehicle of the utility model drives the rear axle, directly inputs the power to the differential, has a simple and compact structure, and improves the transmission efficiency due to shortened transmission chain; It is more stable and can avoid transmission interference caused by vibration to a certain extent. The electric vehicle driving rear axle provided by the utility model can be directly applied to the electric vehicle after being formed into a product. While ensuring driving safety, the utility model fully utilizes the power of the motor to achieve the effect of energy saving and environmental protection.

Description of drawings

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

Fig. 2 is a structural schematic diagram of the motor output gear shaft meshing with the primary reducer;

In the figure, 1. Motor; 2. Gear box; 3. Motor output gear shaft; 4. Primary driven gear; 5. Differential case; 6. Rear axle case cover; 7. Drive axle case; 8. Drive Half shaft; 9, half shaft gear; 10, planetary gear.

detailed description

Below in conjunction with accompanying drawing, the utility model is described in detail.

Fig. 1 is a structural schematic diagram of the utility model, and Fig. 2 is a structural schematic diagram of the motor output gear shaft meshing with a first-stage reducer, as shown in the figure, an electric vehicle drives a rear axle, mainly including a motor 1 and a reduction box 2, the The motor is connected to the motor output gear shaft 3, the motor output gear shaft 3 penetrates the reduction box 2 and engages with the primary driven gear 4, the motor output gear shaft is connected to the reduction box through bolts and bearings, and the primary driven gear shaft The gear 4 is fixed on the differential case 5 by bolts, the rear axle case cover 6 is arranged under the differential case 5 , and the drive axle case is arranged between the reduction box 2 and the rear axle case cover 6 7. The number of the drive axle housing 7 is two, which are respectively located on the left and right sides of the rear axle housing cover 6. The upper end of the drive axle housing 7 is connected to the reduction box 2 through bolts. The lower end of the housing 7 is connected with the rear axle housing cover 6 by bolts, the driving axle shaft 8 runs through the driving axle housing 7, the inner top of the reduction box 2 is fixed with a side shaft gear 9, and the driving axle shaft 8 is connected with planetary gear 10 through side gear 9 .

In this embodiment, the motor 1 and the differential case 5 are connected through a primary reducer, and the driving and driven gears of the primary reducer are the motor output gear shaft 3 and the primary gear respectively. Driven gear 4.

In this embodiment, the motor output gear shaft 3 and the primary driven gear 4 are both bevel gears and mesh with each other. The axis of the motor output gear shaft 3 is perpendicular to the axis of the driving half shaft 8, so The center of gravity of the motor output gear shaft 3 and the primary driven gear 4 is relatively close.

In this embodiment, the motor output gear shaft 3 and the primary driven gear 4 are bevel gears with a low number of teeth processed by cold extrusion, have high rigidity, and have a transmission ratio of 12.

Claims (4)

1. An electric vehicle drives the rear axle, including: a motor (1), a reduction box (2), the motor (1) and the reduction box (2) are connected through a motor output gear shaft (3), and the motor The output gear shaft (3) runs through the reduction box (2) and is connected with the primary driven gear (4), the primary driven gear (4) is connected with the differential case (5) through bolts, and the A rear axle case cover (6) is connected below the reduction box (2), and a drive axle case (7) is provided between the rear axle case cover (6) and the reduction box (2), and the drive axle case (7) are two in number, located on the left and right sides of the rear axle case cover (6), the upper end of the drive axle case (7) is connected with the reduction box (2) through bolts, and the drive The lower end of the axle housing (7) is connected to the rear axle housing cover (6) by bolts, the driving axle shaft (8) runs through the drive axle housing (7), and the inner top end of the reduction box (2) is fixed There is a side gear (9), and the driving half shaft (8) is connected with the planetary gear (10) through the side gear (9). 2. The electric vehicle driving rear axle according to claim 1, characterized in that, the motor (1) is connected to the differential case (5) through a primary reducer, and the primary The main and driven gears of the speed reducer are respectively the motor output gear shaft (3) and the primary driven gear (4). 3. The electric vehicle drive rear axle according to claim 1, characterized in that the motor output gear shaft (3) and the primary driven gear (4) are both bevel gears, and the motor output The axis where the gear shaft (3) is located is perpendicular to the axis of the driving half shaft (8). 4. The electric vehicle driving rear axle according to claim 1, characterized in that, the motor output gear shaft (3) and the primary driven gear (4) are high-strength cones processed by cold extrusion Gears with a transmission ratio of 12.