CN218976477U

CN218976477U - Driving motor water cooling structure for new energy automobile

Info

Publication number: CN218976477U
Application number: CN202223338943.4U
Authority: CN
Inventors: 张磊
Original assignee: Nanjing Bangqi Automatic Transmission Co ltd
Current assignee: Nanjing Bangqi Automatic Transmission Co ltd
Priority date: 2022-12-12
Filing date: 2022-12-12
Publication date: 2023-05-05
Anticipated expiration: 2032-12-12

Abstract

The utility model discloses a driving motor water cooling structure for a new energy automobile, which comprises a motor shell and a water jacket shell positioned in an inner cavity of the motor shell, wherein a spiral water channel is arranged on the outer circular surface of the water jacket shell, the motor shell and the water jacket shell are in interference fit, the inner circular surface of the motor shell surrounds the spiral water channel, and the motor shell and the water jacket shell are connected by friction welding. According to the driving motor water cooling structure for the new energy automobile, the motor shell is in interference fit with the water jacket shell, and the spiral water channel is arranged outside the water jacket shell, so that the driving motor water cooling structure is convenient to assemble and improves sealing reliability.

Description

Driving motor water cooling structure for new energy automobile

Technical Field

The utility model relates to a driving motor water cooling structure for a new energy automobile.

Background

Currently, under the support of national energy conservation and emission reduction policies, the new energy electric automobile industry is rapidly developed, and the development of the traditional fuel oil automobile to the electric automobile is a necessary trend. The new energy automobile power motor has high power density, high efficiency, high reliability and safety, and meanwhile, the driving motor is required to have strong overload capacity, so that the problem of motor temperature rise is caused. And the higher motor temperature rise can influence the reliability and the life of driving motor operation, directly influences the dynamic performance of whole car. The temperature rise problem of the motor can be effectively improved through the water cooling system, and the working efficiency of the motor is improved.

The existing water cooling structure of the driving motor for the new energy automobile is characterized in that a motor shell and a water jacket shell are respectively designed, the water jacket shell is assembled with the motor shell in a bolt connection mode, the design also needs to consider the sealing problem of the motor shell and the water jacket shell, radial sealing is required to be added, the assembly of the shell is not facilitated, and the sealing ring is easy to wear in the assembly process to cause the problem of sealing failure, so that cooling liquid is leaked.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, the utility model provides a driving motor water cooling structure for a new energy automobile, which aims to facilitate assembly and improve sealing reliability.

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows: the driving motor water cooling structure for the new energy automobile comprises a motor shell and a water jacket shell positioned in an inner cavity of the motor shell, wherein a spiral water channel is arranged on the outer circular surface of the water jacket shell, the motor shell is in interference fit with the water jacket shell, the inner circular surface of the motor shell surrounds the spiral water channel, and the motor shell is connected with the water jacket shell by friction welding.

The motor shell and the water jacket shell are assembled through a hot jacket process.

The width of the spiral water channel is 19-21 mm.

A boss is arranged in the motor shell, and a limiting groove for embedding the boss is arranged in the water jacket shell.

The motor shell and the water jacket shell are formed by die casting.

The first end face of the motor shell is in friction welding with the first end face of the water jacket shell, and the second end face of the motor shell is in friction welding with the second end face of the water jacket shell.

According to the driving motor for the new energy automobile, the motor shell is in interference fit with the water jacket shell, and the spiral water channel is arranged outside the water jacket shell, so that the driving motor is convenient to assemble and improves the sealing reliability.

Drawings

The present specification includes the following drawings, the contents of which are respectively:

FIG. 1 is an exploded schematic view of a water cooling structure of a driving motor for a new energy automobile according to the present utility model;

FIG. 2 is a cross-sectional view of a water cooling structure of a driving motor for a new energy automobile according to the present utility model;

FIG. 3 is a schematic view of the construction of the water jacket housing;

FIG. 4 is a schematic structural view of a motor housing;

marked in the figure as: 1. a motor rotor assembly; 2. a water jacket housing; 3. a motor housing; 4. a rotor shaft oil seal; 5. a rotor shaft bearing; 6. a motor stator assembly; a. a limit groove; b. a boss; c. a second end face; d. a first end face; e. a water inlet; f. and a water outlet.

Detailed Description

The following detailed description of the embodiments of the utility model, given by way of example only, is presented in the accompanying drawings to aid in a more complete, accurate and thorough understanding of the concepts and aspects of the utility model, and to aid in its practice, by those skilled in the art.

It should be noted that, in the following embodiments, the "first" and "second" do not represent an absolute distinction between structures and/or functions, and do not represent a sequential order of execution, but are merely for convenience of description.

As shown in fig. 1 to 4, the utility model provides a driving motor water cooling structure for a new energy automobile, which comprises a motor rotor assembly 1, a motor stator assembly 6, a motor housing 3 and a water jacket housing 2 positioned in an inner cavity of the motor housing 3, wherein the water jacket housing 2 is sleeved on the motor stator assembly 6, and a motor positioning assembly is sleeved on the motor rotor assembly 1. The motor rotor assembly 1 is mounted on the motor housing 3 by means of a rotor shaft bearing 5. The outer circular surface of the water jacket shell 2 is provided with a spiral water channel, the motor shell 3 and the water jacket shell 2 are in interference fit, the inner circular surface of the motor shell 3 surrounds the spiral water channel, and the motor shell 3 and the water jacket shell 2 are connected by friction welding.

Specifically, as shown in fig. 1 and 2, the spiral water channel is a cooling water channel formed by extending along the axial direction on the outer circular surface of the water jacket shell 2, the motor shell 3 is provided with a water inlet e and a water outlet f, the water inlet e is communicated with one end of the spiral water channel, the water outlet f is communicated with the other end of the spiral water channel, cooling liquid enters the spiral water channel through the water inlet e and finally flows out of the water outlet f, and cooling can be realized in the process of flowing the cooling liquid through the spiral water channel.

Preferably, the width of the spiral water channel is 20mm, the height of the spiral water channel is 7mm, and the flow rate of the cooling liquid and the contact area of the shell are ensured. The turning of the water channel is smoothly transited through the large round angle, so that the turbulence problem of cooling water passing through the turning is reduced.

As shown in fig. 1 to 4, the motor housing 3 and the water jacket housing 2 are coaxially arranged, the water jacket housing 2 is a cylinder with two open ends and hollow inside, the motor housing 3 and the water jacket housing 2 are respectively and independently formed by die casting, the inner circular surface of the motor housing 3 is contacted with the outer circular surface of the water jacket housing 2, the outer circular surface of the water jacket housing 2 is in interference fit with the inner hole of the motor housing 3, and the motor housing 3 and the water jacket housing 2 are assembled through a hot jacket process.

As shown in fig. 1 to 4, a boss b is disposed in the motor housing 3, and a limit groove into which the boss b is embedded is disposed in the water jacket housing 2, wherein the shape of the boss b is matched with the shape of the limit groove. The spacing groove sets up in the one end edge of water jacket casing 2, and boss b sets up in the interior cavity of motor casing 3, through boss b and the cooperation in spacing groove, makes things convenient for water jacket casing 2 and motor casing 3 to fix a position when the assembly, and boss b imbeds in the spacing groove, guarantees at friction welding's in-process water jacket casing 2 can not take place relative rotation between motor casing 3, also ensures simultaneously that water inlet e and delivery port f's position is correct.

As shown in fig. 1 to 4, the first end surface d of the motor housing 3 is friction-welded to the first end surface d of the water jacket housing 2, and the second end surface c of the motor housing 3 is friction-welded to the second end surface c of the water jacket housing 2, thereby forming an integrated cooling water channel.

The utility model is described above by way of example with reference to the accompanying drawings. It will be clear that the utility model is not limited to the embodiments described above. As long as various insubstantial improvements are made using the method concepts and technical solutions of the present utility model; or the utility model is not improved, and the conception and the technical scheme are directly applied to other occasions and are all within the protection scope of the utility model.

Claims

1. The utility model provides a driving motor water cooling structure for new energy automobile, includes motor housing and the water jacket casing that is arranged in the interior cavity of motor housing, sets up spiral water course, its characterized in that on the outer disc of water jacket casing: the motor shell is in interference fit with the water jacket shell, the inner circular surface of the motor shell surrounds the spiral water channel, and the motor shell is connected with the water jacket shell through friction welding.

2. The driving motor water cooling structure for a new energy automobile according to claim 1, wherein: the motor shell and the water jacket shell are assembled through a hot jacket process.

3. The driving motor water cooling structure for a new energy automobile according to claim 1, wherein: the width of the spiral water channel is 19-21 mm.

4. A driving motor water cooling structure for a new energy automobile according to any one of claims 1 to 3, characterized in that: a boss is arranged in the motor shell, and a limiting groove for embedding the boss is arranged in the water jacket shell.

5. A driving motor water cooling structure for a new energy automobile according to any one of claims 1 to 3, characterized in that: the motor shell and the water jacket shell are formed by die casting.

6. A driving motor water cooling structure for a new energy automobile according to any one of claims 1 to 3, characterized in that: the first end face of the motor shell is in friction welding with the first end face of the water jacket shell, and the second end face of the motor shell is in friction welding with the second end face of the water jacket shell.