CN211710610U

CN211710610U - Electric drive system with speed reduction device

Info

Publication number: CN211710610U
Application number: CN202020078353.4U
Authority: CN
Inventors: 杨浩
Original assignee: Zhejiang PanGood Power Technology Co Ltd
Current assignee: Shanghai Panhu Power Technology Co.,Ltd.
Priority date: 2020-01-14
Filing date: 2020-01-14
Publication date: 2020-10-20
Anticipated expiration: 2030-01-14

Abstract

The utility model provides an electricity drive system with decelerator belongs to vehicle drive technical field, has solved that the integration level is low between prior art's reducing gear box and the main reducer, weight is heavy, motor space occupies big, can not change the scheduling problem. The utility model discloses a first casing and second casing, first casing and second casing assembly back formation reduction gear installation cavity, the first casing outside is equipped with driving motor, is equipped with reduction gear group in the first casing, and the coupling of driving motor output shaft and reduction gear group input shaft is equipped with main reduction gear group in the second casing, and reduction gear group's output shaft couples with main reduction gear group's input shaft. The utility model discloses a regard first casing and second casing as reducing gear box and main reducer's common casing among the prior art, the integrated level is high, and light in weight has saved the cost, can form the second grade speed reduction through reduction gear set and main reducer gear set cooperation simultaneously, is connected with current axle housing through the flange, and the replaceability is strong.

Description

Electric drive system with speed reduction device

Technical Field

The utility model belongs to the technical field of vehicle drive device, particularly, relate to an electricity drive system with decelerator.

Background

The final drive is a mechanism capable of changing torque and rotational speed in a transaxle, and functions to increase torque from a transmission or a universal transmission, while reducing rotational speed and changing the direction of transmission of torque. The main reducer is composed of one or more pairs of reduction gear pairs, and power is input from a driving gear and output from a driven gear.

The mode that prior art adopted is motor + reducing gear box + transmission shaft + main reducer's drive mode, and this technique not only integrated level is low, inefficiency, and the weight is heavy moreover, is not fit for the development of electricelectric motor car.

In view of the above-mentioned drawbacks in the prior art, a solution is proposed by those skilled in the art, such as an integrated two-gear electric drive system disclosed in chinese patent CN110065374A, which includes a motor, a reducer, a differential and a cooling assembly; the motor and the speed reducer are integrated in a shell, and the shell is divided into a motor working chamber and a speed reducer working chamber; the output shaft of the motor and the input shaft of the speed reducer share one transmission shaft; the transmission shaft penetrates through the motor rotor, and two ends of the transmission shaft are arranged on the shell through bearings; the differential is positioned in the working chamber of the speed reducer and is supported on the shell through a bearing; the motor stator is fixed in the shell; the speed reducer adopts a parallel shaft two-stage speed reducing mechanism; the cooling assembly comprises an oil pump, an oil pipe and a heat exchanger; the heat exchanger is positioned outside the shell; the oil pump pumps the lubricating oil in the working chamber of the speed reducer into the heat exchanger through the oil pipe for cooling, then the lubricating oil is pumped into the working chamber of the motor and sprayed on the stator and the rotor; the two chambers are communicated through an oil return hole.

Although the problem of prior art integrated level low, bulky, with high costs and motor stator rotor cooling effect not good has been solved, its motor is installed in the casing, inconvenient change motor and maintenance, and what the comparison file adopted simultaneously is radial motor, and radial motor is bulky, and is inefficient.

SUMMERY OF THE UTILITY MODEL

The utility model aims at the above-mentioned problem that exists among the prior art, provide one kind with driving motor, main reducer and integrated electric drive system as an organic whole of reducing gear box.

The purpose of the utility model can be realized by the following technical proposal: the utility model provides an electric drive system with decelerator, includes first casing and second casing, first casing and second casing assembly after form the reduction gear installation cavity, the first casing outside be equipped with driving motor, first casing in be equipped with reduction gear group, driving motor output shaft and reduction gear group input shaft hookup, the second casing in be equipped with main reduction gear group, reduction gear group's output shaft and main reduction gear group's input shaft hookup.

Drive the reduction gear group rotation in the first casing through driving motor, each gear cooperation transmission in the reduction gear group forms one-level speed reduction, reduction gear group forms the second grade speed reduction through the cooperation transmission again with the main reducer gear group in the second casing, and directly form the reduction gear installation cavity through first casing and second casing, main reducer's transmission shaft among the prior art has been subtracted, the integrated level is high, light in weight, the cost is saved, in addition, driving motor installs in the first casing outside, make things convenient for the maintenance and the change of motor.

In the above electric drive system with the speed reduction device, the second housing is further provided with a power output spline connected with the output end of the main speed reducer gear set, and the spline can be respectively connected with the half shafts on two sides of the housing to provide power output.

In the above electric drive system with a reduction gear, the first housing and the second housing are connected by a bolt. The bolt connection is convenient to install and disassemble.

In the above electric drive system with a reduction gear, the first housing is provided with a flange connected to an axle housing of the vehicle. The flange can be directly connected with the existing axle, so that the driving system can replace the structure of the existing main reducer, transmission shaft, reduction gearbox and motor.

In the above electric drive system with a reduction gear, the reduction gear set is a primary gear set. The primary gear set can be matched with the main speed reducer gear set to realize secondary speed reduction.

In the above electric drive system with a reduction gear, as another aspect, the reduction gear set is a multi-stage gear set. The multi-stage gear set can be matched with a main speed reducer gear set to realize multi-stage speed reduction.

In the above electric drive system with a speed reduction device, the drive motor is an axial permanent magnet motor. The axial permanent magnet motor is small in size and large in power, and is suitable for light weight requirements of a vehicle driving motor.

Compared with the prior art, the utility model has the advantages that the first shell and the second shell are used as the common shell of the reduction box and the main reducer in the prior art, the transmission shaft of the main reducer in the prior art is omitted, the integration level is high, the weight is light, and the cost is saved; a two-stage speed reduction can be formed by matching the speed reduction gear set with the main speed reducer gear set; through the flange with current axle housing connection, the replaceability is strong, under the prerequisite that does not change current axle structure, but main reducer, transmission shaft, reducing gear box and the driving motor on the direct replacement current axle have simple structure, and the integrated level is high, advantage with low costs, in addition, driving motor installs in the first casing outside, makes things convenient for the maintenance and the change of motor, uses axial permanent-magnet machine, can practice thrift the space, increase power.

Drawings

Fig. 1 is a schematic perspective view of the present invention;

fig. 2 is a schematic perspective view of the present invention;

FIG. 3 is a schematic view of the simple structure of the present invention;

in the figure, 1, a first housing; 2. a second housing; 3. a drive motor; 4. a reduction gear set; 5. a main reducer gear set; 6. a spline; 7. a bolt; 8. and (4) a flange.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in fig. 1-3, the utility model discloses a first casing 1 and second casing 2, first casing 1 and second casing 2 assembly after form the reduction gear installation cavity, the 1 outside of first casing be equipped with driving motor 3, first casing 1 in be equipped with reduction gear set 4, driving motor 3 output shaft and the hookup of reduction gear set 4 input shaft, second casing 2 in be equipped with main reduction gear set 5, reduction gear set 4's output shaft and the hookup of main reduction gear set 5's input shaft.

Drive reduction gear train 4 in the first casing 1 through driving motor 3 and rotate, each gear cooperation transmission in the reduction gear train 4 forms one-level speed reduction, reduction gear train 4 forms the second grade speed reduction with the 5 rethread cooperation transmissions of main reducer gear train in the second casing 2, and direct first casing 1 and second casing 2 formation reduction gear installation cavity, main reducer's transmission shaft among the prior art has been subtracted, the integrated level is high, light in weight, the cost is saved, in addition, driving motor 3 installs in the first casing outside, convenient maintenance and change.

The second shell 2 is also provided with a power output spline 6 connected with the output end of the main speed reducer gear set 5, and the spline 6 can be respectively connected with half shafts on two sides of the shell to provide power output.

The first housing 1 and the second housing 2 are connected by bolts 7. The bolt 7 connection is convenient to install and disassemble.

The first housing 1 is provided with a flange 8 connected to the axle housing of the vehicle. Respectively directly replace the existing main speed reducer.

The reduction gear set 4 is a primary gear set. The primary gear set can cooperate with the main reducer gear set 5 to realize secondary speed reduction.

The driving motor 3 is an axial permanent magnet motor. The axial permanent magnet motor is small in size and large in power, and is suitable for light weight requirements of a vehicle driving motor.

The utility model discloses the theory of operation: this device is installed on the automobile axle housing, it rotates to drive the 4 input shafts of reduction gear set rather than the connection through 3 output shafts of driving motor earlier, the one-level speed reduction is realized through the cooperation transmission again to each gear radius variation in reduction gear set 4, again because the output shaft of reduction gear set 4 couples with the input shaft of main reduction gear set 5, two sets of gear set radius variation cooperation transmission realize the second grade speed reduction, main reduction gear set 5 output after the second grade speed reduction carries power on the spline 6 rather than being connected, the semi-axis of rethread 6 both sides drives the auto wheel.

The utility model uses the first shell 1 and the second shell 2 as the common shell of the reduction box and the main reducer in the prior art, and the transmission shaft of the main reducer in the prior art is subtracted, so that the integration level is high, the weight is light, and the cost is saved; a two-stage speed reduction can be formed by matching the speed reduction gear set 4 with the main speed reducer gear set 5; through flange 8 with current axle housing connection, the replaceability is strong, under the prerequisite that does not change current axle structure, but main reducer, transmission shaft, reducing gear box and driving motor 3 on the direct replacement current axle have simple structure, and the integrated level is high, advantage with low costs, in addition, driving motor 3 installs in the 1 outside of first casing, makes things convenient for the maintenance and the change of motor, uses axial permanent-magnet machine, can practice thrift the space, increase power.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims

1. An electric drive system with a reduction gear, characterized in that: including first casing (1) and second casing (2), first casing (1) and second casing (2) assemble the back and form the reduction gear installation cavity, first casing (1) outside be equipped with driving motor (3), first casing (1) in be equipped with reduction gear set (4), driving motor (3) output shaft and reduction gear set (4) input shaft hookup, second casing (2) in be equipped with main reduction gear set (5), the output shaft of reduction gear set (4) and the input shaft hookup of main reduction gear set (5).

2. An electric drive system with a reduction unit according to claim 1, characterized in that: and a power output spline (6) connected with the output end of the main speed reducer gear set (5) is further arranged on the second shell (2), and the spline (6) can be respectively connected with half shafts on two sides of the shell to provide power output.

3. An electric drive system with a reduction gear according to claim 1 or 2, characterized in that: the first shell (1) is connected with the second shell (2) through a bolt (7).

4. An electric drive system with a reduction gear according to claim 1 or 2, characterized in that: the first shell (1) is provided with a flange (8) connected with a vehicle axle housing.

5. An electric drive system with a reduction gear according to claim 1 or 2, characterized in that: the reduction gear set (4) is a primary gear set.

6. An electric drive system with a reduction gear according to claim 1 or 2, characterized in that: the reduction gear set (4) is a multi-stage gear set.

7. An electric drive system with a reduction gear according to claim 1 or 2, characterized in that: the driving motor (3) is an axial permanent magnet motor.