CN210454432U

CN210454432U - Integrated form electric drive system

Info

Publication number: CN210454432U
Application number: CN201822072571.2U
Authority: CN
Inventors: 白阳
Original assignee: Beijing Henrey Automobile Technology Co ltd
Current assignee: Beijing Henrey Automobile Technology Co ltd
Priority date: 2018-12-11
Filing date: 2018-12-11
Publication date: 2020-05-05
Anticipated expiration: 2028-12-11

Abstract

The utility model provides an integrated form electric drive system belongs to electric automobile technical field. The parts of the differential mechanism mainly comprise a motor stator (12), a motor rotor (11), a motor output shaft (13), a motor box body (15), a speed reducer box body (17), a differential mechanism assembly (27), a reduction gear (29), a left output half shaft (33) and a right output half shaft (24). The utility model discloses well motor output shaft (13) also is the gear shaft simultaneously, directly processes the pinion in the reduction gear to motor output shaft (13), connects reduction gear (29) on differential mechanism assembly (27) through the bolt, makes the structure compacter; the gear of the motor output shaft (13) and the differential assembly (27) share the same box body (17), and the traditional spline and bolt connection of the motor and the reducer is replaced to ensure the coaxiality, so that the working strength and the rigidity of the reducer box body (17) are obviously improved. The utility model discloses it is higher to compare in traditional motor, reduction gear and differential mechanism coupling mechanism integrated level.

Description

Integrated form electric drive system

Technical Field

The invention belongs to a power drive assembly of an electric automobile, and particularly relates to an integrated electric drive assembly.

Background

With the rapid development of the electric automobile industry, the requirements on the cruising ability, the light weight of the servicing quality, the integration level of parts and the performance of the electric automobile industry are higher and higher. At present, a motor and a speed reducer of an electric automobile are mainly connected and transmit power in a flange bolt and spline mode, a two-stage speed reducing mechanism is adopted in the speed reducer on the market, the structural universality is strong, but the structural design is conservative, the strength and the rigidity are obviously excessive, pertinence is avoided, meanwhile, the transmission mechanism is low in transmission efficiency, large in structural size, incapable of meeting the requirement of light weight, and high in cost. The invention provides a novel integrated electric drive system, which can reasonably improve the defects through reasonable layout and optimized structure.

Disclosure of Invention

The invention aims to design an integrated electric drive system, which can improve the transmission efficiency, reduce the structural size and weight, reduce the cost, improve the strength and rigidity of the whole structure and improve the performance of the electric drive system.

The purpose of the invention can be realized by the following technical scheme: the traditional single motor and the reduction gearbox are two parts with independent structures, and the single motor is provided with a front end cover structure and is connected and assembled with the flange surface of the single reduction gearbox body through bolts. Motor part casing and second half reduction gear box body unite two into one and become motor box body (15) in this patent, and motor box body (15) have both undertaken motor front end housing function and are half casing of another half of reduction gear box body again, and this structure is integrated into a motor box body (15) with traditional single motor front end housing structure and single reduction gear box body flange face, has reduced repetitive construction, has reduced the bolt and has used, has reduced weight, and the integrated level is higher. Motor output shaft (13) and the pinion integration of reduction gear replace traditional motor output shaft and the spline connected mode of reduction gear shaft, improve rotation efficiency, saved the manufacturing procedure of spline, reduce the cost.

In the integrated electric driving system, the reduction gear (29) is integrated in the differential assembly (27) in a differential bolt (30) connection mode, the performance requirements of speed reduction and torque increase can be met by ensuring the primary reduction structure through performance check aiming at the characteristics of the electric vehicle, the traditional conservative design of secondary speed reduction is replaced, the driving system is more compact in structure, lower in space occupancy rate, reduced in gear number, lighter in weight and cost-saving.

In the integrated electric driving system, the gear of the motor output shaft (13) and the differential assembly (27) share the same reduction box body (17) to replace the traditional spline and bolt connection of a motor and a reducer, so that the coaxiality is ensured, the working strength and the rigidity of the reduction box body (17) are obviously improved, and the integral working performance of the system is better ensured.

In the integrated electric drive system, the shell part comprises a rotary rear cover (2), a rear end cover (5), a motor box body (15), a reduction box body (17) and a bearing cover (20), and the rotary rear cover (2) is connected with the rear end cover (5) through a rotary cover bolt (1); the rear end cover (5) is connected with the motor box body (15) through a rear end cover bolt (8); the motor box body (15) is connected with the reduction box body (17) through a box closing bolt (16); the bearing cover (20) is connected with the reduction box body (17) through a bearing cover bolt (21). And the bolt connection mode is adopted, so that the disassembly is convenient, and the maintenance is facilitated.

In the integrated electric drive system, the differential assembly (27), the reduction box body (17) and the motor box body (15) are supported by the left differential bearing (31) and the right differential bearing (26), and the positions of the differential assembly (27) and the right differential bearing (26) are adjusted by the adjusting gasket (23) to ensure the assembly precision of the whole system.

In the integrated electric driving system, the bearing cover (20) is connected and fixed on the reduction box body (17) through the bearing cover bolt (21) and is used for fixing the right end bearing (18) and adjusting the oil clearance of the bearing by adjusting the thickness of the bearing retainer ring (22), so that the mounting precision of the bearing is ensured, and the service life is prolonged.

In foretell integrated form electric drive system, mainly become rear cover (2), rear end cap (5), change rotor (3) soon, change stator (6) soon, motor stator (12), motor rotor (11), rotor clamping ring (10), motor output shaft (13), motor box (15), reduction box (17), differential mechanism assembly (27), reduction gear (29) and left output semi-axis (33), right output semi-axis (24) constitute its characterized in that: the motor stator (12), the motor rotor (11) and the motor output shaft (13) are integrated in the motor box body (15), the reduction gear (29) and the differential mechanism assembly (27) are integrated in the reduction box body (17), and the motor box body (15) and the reduction box body (17) jointly form an electric drive system.

In the integrated electric driving system, one end of a motor output shaft (13) is a shaft formed by a gear shaft and a speed reducer input shaft, the output torque of the motor is transmitted to a reduction gear (29) through a gear, the reduction gear (29) is fixed on a differential assembly (27) through a differential bolt (30), and the reduction gear (29) transmits the power to the differential assembly (27) and then to wheels through a left output half shaft (33) and a right output half shaft (24); the other end of the motor output shaft (13) is provided with a rotary transformer rotor (3) which is positioned by a shaft shoulder of the motor output shaft (13) and a clamp spring (4).

In the integrated electric drive system, the left output half shaft (33) penetrates through the inside of the motor box body (15) to be connected with the differential assembly (27) through splines and is sealed by the right half shaft oil seal (32), and the right output half shaft (24) penetrates through the inside of the reduction box body (17) to be connected with the differential assembly (27) through the splines and is sealed by the left half shaft oil seal (25).

In the integrated electric driving system, the motor output shaft (13) and the motor box body (15) are sealed by the motor shaft oil seal (14), gear oil in the reduction box body (17) is partially separated from the motor box body (15), and the sealing property in the motor is ensured.

In the integrated electric drive system, the left half shaft oil seal (25) and the right half shaft oil seal (32) are arranged in the reduction box body (17) of the motor box body (15), the left output half shaft (33) penetrates through the left half shaft oil seal (25) and the right output half shaft (24) penetrates through the right half shaft oil seal (32), gear oil in the box body is separated from the outside, and the internal sealing performance of the reduction box body (17) is ensured.

In the integrated electric driving system, the motor output shaft (13) is supported by a left end bearing (9) and a right end bearing (18); one side of the left end bearing (9) is positioned by a shaft shoulder of the output shaft (13) of the motor, and the other side of the left end bearing is pre-tightened by the wave-shaped washer (7); the right end bearing (18) is limited by a shaft shoulder of the motor output shaft (13), the reduction box body (17) and the right clamp spring (19).

Drawings

FIG. 1: the invention discloses a cross section of an integrated driving system of an electric automobile.

Detailed Description

The core of the invention is an integrated electric drive system of an electric automobile, which mainly comprises a motor stator (12), a motor rotor (11), a motor output shaft (13), a motor box body (15), a reduction box body (17), a differential assembly (27), a reduction gear (29), a left output half shaft (33) and a right output half shaft (24). The main functions of the invention are that the motor rotor (11) rotates to drive the motor output shaft (13) to transmit, meanwhile, the power is transmitted to the reduction gear (29) on the differential assembly (27) through the gear structure at one end of the motor output shaft (13), the reduction gear (29) transmits the power to the differential assembly (27), and the differential assembly (27) distributes the power to the left output half shaft (33) and the right output half shaft (24) and finally transmits the power to the wheels to achieve the effect of transmitting the power.

Claims

1. The utility model provides an integrated form electric drive system mainly includes and revolves becomes rear cover (2), rear end cap (5), revolves and becomes rotor (3), revolves and becomes stator (6), motor stator (12), motor rotor (11), rotor clamping ring (10), motor output shaft (13), motor box (15), reduction box (17), differential mechanism assembly (27), reduction gear (29) and left output semi-axis (33), right output semi-axis (24) constitute its characterized in that: the motor stator (12), the motor rotor (11) and the motor output shaft (13) are integrated in the motor box body (15), the reduction gear (29) and the differential mechanism assembly (27) are integrated in the reduction box body (17), and the motor box body (15) and the reduction box body (17) jointly form an electric drive system.

2. An integrated electric drive system as claimed in claim 1, wherein one end of the motor output shaft (13) is a gear shaft and the reducer input shaft is a shaft, the motor output torque is transmitted to the reduction gear (29) through a gear, the reduction gear (29) is fixed on the differential assembly (27) through a differential bolt (30), and the reduction gear (29) transmits the power to the differential assembly (27) and then to the wheels through the left output half shaft (33) and the right output half shaft (24); the other end of the motor output shaft (13) is provided with a rotary transformer rotor (3) which is positioned by a shaft shoulder of the motor output shaft (13) and a clamp spring (4).

3. An integrated electric drive system as claimed in claim 1, wherein the left output half shaft (33) is splined through the interior of the motor case (15) to the differential assembly (27) and sealed with a right half shaft oil seal (32), and the right output half shaft (24) is splined through the interior of the reduction case (17) to the differential assembly (27) and sealed with a left half shaft oil seal (25).

4. The integrated electric drive system according to claim 1, wherein the motor output shaft (13) and the motor box body (15) are sealed by a motor shaft oil seal (14), and gear oil in the reduction box body (17) is partially separated from the motor box body (15) to ensure the sealing property inside the motor.

5. The integrated electric drive system as claimed in claim 1, wherein a left half shaft oil seal (25) and a right half shaft oil seal (32) are arranged in the reduction box body (17) of the motor box body (15), and a left output half shaft (33) penetrates through the left half shaft oil seal (25) and a right output half shaft (24) penetrates through the right half shaft oil seal (32) to separate gear oil in the reduction box body (17) from the outside, so that the internal sealing performance of the reduction box body (17) is ensured.

6. An integrated electric drive system according to claim 1, characterized in that the motor output shaft (13) is supported by a left end bearing (9) and a right end bearing (18); one side of the left end bearing (9) is positioned by a shaft shoulder of the output shaft (13) of the motor, and the other side of the left end bearing is pre-tightened by the wave-shaped washer (7); the right end bearing (18) is limited by a shaft shoulder of the motor output shaft (13), the reduction box body (17) and the right clamp spring (19).

7. An integrated electric drive system as claimed in claim 1, characterized in that the bearing cap (20) is fastened to the reduction housing (17) by means of a bearing cap screw (21) which serves to fix the right-hand bearing (18) and to adjust the bearing oil clearance by adjusting the thickness of the bearing ring (22).

8. The integrated electric drive system according to claim 1, wherein the housing part comprises a rotary rear cover (2), a rear end cover (5), a motor box body (15), a reduction box body (17) and a bearing cover (20), and the rotary rear cover (2) is connected with the rear end cover (5) through a rotary cover bolt (1); the rear end cover (5) is connected with the motor box body (15) through a rear end cover bolt (8); the motor box body (15) is connected with the reduction box body (17) through a box closing bolt (16); the bearing cover (20) is connected with the reduction box body (17) through a bearing cover bolt (21).

9. The integrated electric drive system according to claim 1, wherein the differential assembly (27) is supported by the reduction case (17) and the motor case (15) by a left differential bearing (31) and a right differential bearing (26), and the positions of the differential assembly (27) and the right differential bearing (26) are adjusted by an adjusting washer (23).

10. An integrated electric drive system according to claim 1, characterized in that the system is designed to meet performance requirements by using a one-stage reduction of the motor output shaft (13) gear and the reduction gear (29) instead of a conventional two-stage reduction.