CN106763661B

CN106763661B - Electric automobile and main reducer and rear axle structure thereof

Info

Publication number: CN106763661B
Application number: CN201710086110.8A
Authority: CN
Inventors: 李代炳
Original assignee: Chongqing Ruiyang Xinchi New Energy Automobile Co ltd
Current assignee: Chongqing Ruiyang Xinchi New Energy Automobile Co ltd
Priority date: 2017-02-17
Filing date: 2017-02-17
Publication date: 2023-06-27
Anticipated expiration: 2037-02-17
Also published as: CN106763661A

Abstract

The invention discloses a main speed reducer of an electric automobile, which comprises a main speed reducer body arranged in a rear axle of the electric automobile, wherein the main speed reducer body comprises a box body with a gear pair arranged in the box body, a first opening for entering gear oil and a second opening for exiting gear oil are formed in the box body, and the interior of the rear axle is filled with the gear oil. Through the main speed reducer of the electric automobile, noise is low when the main speed reducer operates; simultaneously make inside gear of main reducer obtain fully lubricated and the oil circuit can be at the rear axle inner loop, and then solved the heat dissipation problem of main reducer. In addition, the invention also discloses an electric automobile and a rear axle structure thereof.

Description

Electric automobile and main reducer and rear axle structure thereof

Technical Field

The invention relates to the technical field of new energy automobiles, in particular to an electric automobile and a main speed reducer and a rear axle structure thereof.

Background

Along with the continuous and severe environmental problems, new energy automobiles gradually become the development direction of future automobiles. Electric vehicles are more and more on the market at present, however, a main speed reducer of the electric vehicle is one of important components for power transmission of the electric vehicle. A final drive is a mechanism that is capable of changing torque and rotational speed within a drive axle, the primary function of which is to increase torque from an electric motor or transmission while reducing rotational speed and changing the direction of torque transfer. The main speed reducer consists of one or more pairs of speed reducing gear pairs, and power is input by a driving gear and output by a driven gear.

The box structure of the existing main speed reducer is mainly divided into two types: open and closed. Compared with a fuel automobile, the electric automobile has higher requirements for low noise when the automobile runs. The existing main speed reducer of the electric automobile has the problems that the noise problem and the heat dissipation problem are difficult to solve at the same time, the closed box body can solve the noise problem, but the oil way is not sufficiently lubricated, and the heat dissipation effect is very poor; the open box can solve the problem of oil circuit, but the noise problem is difficult to solve, if the noise is to be reduced, only the gear machining precision can be improved, and the cost is greatly increased.

In summary, how to solve the noise problem and the heat dissipation problem of the main reducer is difficult to solve at the same time has become a technical problem to be solved by those skilled in the art.

Disclosure of Invention

The invention aims to provide an electric automobile, a main speed reducer and a rear axle structure thereof, so as to solve the noise problem and the heat dissipation problem of the main speed reducer.

In order to achieve the above purpose, the invention provides a main speed reducer of an electric automobile, which comprises a main speed reducer body arranged in a rear axle of the electric automobile, wherein the main speed reducer body comprises a box body internally provided with a gear pair, a first opening for allowing gear oil to enter and a second opening for allowing the gear oil to flow out are formed in the box body, and the interior of the rear axle is filled with the gear oil.

Preferably, the case includes an upper case and a lower case.

Preferably, a sealing gasket is further arranged between the upper box body and the lower box body.

Preferably, the first opening and the second opening are provided at the abutting positions of the upper case and the lower case.

Preferably, the first opening and the second opening are both disposed below the final drive in a normal loading state.

Preferably, the number of the first openings is a plurality.

Preferably, the number of the second openings is a plurality.

Compared with the introduction of the background technology, the main speed reducer of the electric automobile has the advantages that as the first opening and the second opening are formed in the main speed reducer box body, the gear pair of the main speed reducer is entirely covered by the box body, and therefore, when the main speed reducer operates, the noise is low; simultaneously owing to be provided with first opening and second opening on the box that sets up in the inside main reducer of rear axle for when main reducer operates, the gear oil in the rear axle can get into main reducer from first opening, then flows out main reducer from the second opening, makes the inside gear of main reducer obtain fully lubricated and the oil circuit can circulate in the rear axle, and then has solved the heat dissipation problem of main reducer.

In addition, the invention also provides a rear axle structure of the electric automobile, which comprises a main speed reducer arranged in the rear axle structure, wherein the main speed reducer is the main speed reducer described in any scheme.

Preferably, the rear axle structure further comprises a differential mechanism arranged inside the rear axle structure.

In addition, the invention provides an electric automobile, which comprises a main speed reducer, wherein the main speed reducer is the main speed reducer described in any scheme.

Because the rear axle structure of the electric vehicle and the electric vehicle all follow the core ideas of the main speed reducer of the electric vehicle, the main speed reducer of the electric vehicle has the technical effects, and the rear axle structure of the electric vehicle and the electric vehicle which follow the core ideas of the main speed reducer of the electric vehicle also have the corresponding technical effects, and are not repeated herein.

Drawings

Fig. 1 is a schematic diagram of a main view structure of a main reducer of an electric automobile according to an embodiment of the present invention;

FIG. 2 is a schematic top view of FIG. 1;

FIG. 3 is a schematic left-hand view of the structure of FIG. 1;

fig. 4 is a schematic structural diagram of a first opening and a second opening of a main reducer of an electric vehicle according to an embodiment of the present invention.

In the above-described figures 1-4,

an upper box 1, a lower box 2, a first opening 3 and a second opening 4.

Detailed Description

The invention provides an electric automobile, a main speed reducer and a rear axle structure thereof, so as to solve the noise problem and the heat dissipation problem of the main speed reducer.

In order to make the technical solution provided by the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1-4, the main reducer of the electric automobile provided by the embodiment of the invention comprises a main reducer body arranged in a rear axle of the electric automobile, wherein the main reducer body comprises a box body internally provided with a gear pair, a first opening 3 for entering gear oil and a second opening 4 for exiting gear oil are formed in the box body, and the rear axle is internally filled with the gear oil. It should be noted that, in the actual production process, since the first opening and the second opening of the box body are both located in the gear oil in the rear axle, when the main reduction gearbox operates, the gear oil inevitably flows out along with the operation of the gear, and meanwhile, the gear oil also flows in.

In a specific embodiment, the above-mentioned case may include an upper case 1 and a lower case 2. The upper body is more convenient to assemble by arranging the box body into the split structure. It will be understood, of course, that the above-mentioned upper case and lower case are only examples of embodiments of the present invention, and may be an integrally formed structure with a hole for accommodating a gear formed on a side portion and engaged with the hole, or may be other split structures, such as a left-right split structure, wherein the left portion is an upper-lower split structure, and the right portion is an integral structure, and then the left-right split structure is assembled together.

In a specific embodiment, when the above-mentioned box structure adopts a split structure, in order to make the low noise performance of the box better, a gasket is further provided between the upper box 1 and the lower box 2. Thus, other parts of the box body except the first opening and the second opening are airtight, and the overall low-noise performance of the box body is better.

In a practical embodiment, the positions of the first opening 3 and the second opening 4 may be arranged at the abutting positions of the upper case 1 and the lower case 2, so that the processing of the first opening and the second opening is more convenient in the practical processing process. It will of course be appreciated that the above described docking positions are only a preferred example of an embodiment of the invention and that other positions of the case are possible.

In a further embodiment, the first opening 3 and the second opening 4 are both disposed below the main speed reducer in a normal loading state (herein, the main speed reducer is stably mounted on the vehicle in an actual mounting process), so that oil is fed into the first opening and oil is discharged from the second opening more conveniently, and the rear axle can be made not to be filled with gear oil, as long as the positions of the first opening and the second opening are kept sufficient. It should be noted that the foregoing is merely a preferred example of the embodiment of the present invention, and the first opening and the second opening may be disposed at other positions according to the production requirement, for example, the first opening and the second opening are disposed at the bottom side or the side, respectively.

In a further embodiment, the number of the first openings 3 may be plural, so that when one first opening is blocked, the other first openings are still in a usable state, thereby ensuring smooth circulation of the oil path of the tank body; the number of the second openings 4 can also be multiple, so that when one second opening is blocked, the other second openings are still in a usable state, and smooth circulation of the oil way of the box body is ensured. It will be understood, of course, that the number of the first openings and/or the number of the second openings is merely a preferred example of the embodiment of the present invention, and the arrangement manner that the number of the first openings is single and/or the number of the second openings is single may also be adopted.

In a further embodiment, the electric automobile rear axle structure further comprises a differential mechanism arranged inside the rear axle structure. Through setting up differential mechanism for two semi-axles on the rear axle can realize different rotational speeds and rotate, and then satisfy that both sides wheel makes unequally distance and traveles with pure rolling form as far as possible, reduce the friction of tire and ground.

The electric automobile and the main speed reducer and the rear axle structure thereof provided by the invention are described in detail. It should be noted that, in the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described as different from other embodiments, and identical and similar parts between the embodiments are all enough to be referred to each other.

It is further noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that an article or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such article or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in an article or apparatus that comprises such element.

The principles and embodiments of the present invention have been described herein with reference to specific examples, the description of which is intended only to facilitate an understanding of the method of the present invention and its core ideas. It should be noted that it will be apparent to those skilled in the art that various modifications and adaptations of the invention can be made without departing from the principles of the invention and these modifications and adaptations are intended to be within the scope of the invention as defined in the following claims.

Claims

1. The main speed reducer of the electric automobile comprises a main speed reducer body arranged in a rear axle of the electric automobile, wherein the main speed reducer body comprises a box body internally provided with a gear pair, and the main speed reducer is characterized in that a first opening (3) for gear oil to enter and a second opening (4) for gear oil to flow out are formed in the box body, and gear oil is filled in the rear axle;

the box body comprises an upper box body (1) and a lower box body (2); the first opening (3) and the second opening (4) are arranged at the butt joint position of the upper box body (1) and the lower box body (2); the number of the first openings (3) is a plurality.

2. The final drive of an electric vehicle according to claim 1, wherein a gasket is further provided between the upper case (1) and the lower case (2).

3. Final drive for an electric vehicle according to claim 1 or 2, characterized in that the first opening (3) and the second opening (4) are both arranged below the final drive in a normal loading state.

4. Final drive for an electric vehicle according to claim 1, characterized in that the number of the second openings (4) is a plurality.

5. An electric automobile rear axle structure, including setting up the main reducer in the inside of rear axle structure, characterized in that, main reducer is the main reducer of any one of claims 1-4.

6. The electric automobile rear axle structure of claim 5, further comprising a differential disposed within the rear axle structure.

7. An electric vehicle comprising a final drive, wherein the final drive is a final drive as claimed in any one of claims 1 to 4.