阅读说明：本技术 一种电动汽车用电机机座 (Motor frame for electric automobile ) 是由 石鸿佼 胡勇峰 崔龙 李蓉 胡华 史文波 井睿康 孟繁东 叶文宏 于 2018-06-27 设计创作，主要内容包括：本发明公开了一种电动汽车用电机机座,包括：相互套置的内筒和外筒；内筒的外壁设置有多个沿内筒的轴向延伸且不贯通的第一条状凸起,多个第一条状凸起沿内筒的圆周方向均匀分布；外筒的内壁设置有多个沿外筒的轴向延伸且不贯通的第二条状凸起,多个第二条状凸起沿外筒的圆周方向均匀分布；第一条状凸起与第二条状凸起交错设置共同构成冷却水道；外筒的内壁还设置有一个位于某两个第二条状凸起之间的第三条状凸起,第三条状凸起与位于两个第二条状凸起之间的第一条状凸起紧密配合将冷却水道隔断；外筒还设置与冷却水道连通且分别位于第三条状凸起两侧的进水口和出水口。本发明具有结构简单、易于生产、便于装配、密封性良好的优点。(The invention discloses a motor base for an electric automobile, which comprises: an inner cylinder and an outer cylinder which are mutually sleeved; the outer wall of the inner cylinder is provided with a plurality of first strip-shaped bulges which extend along the axial direction of the inner cylinder and are not communicated, and the plurality of first strip-shaped bulges are uniformly distributed along the circumferential direction of the inner cylinder; the inner wall of the outer barrel is provided with a plurality of second strip-shaped bulges which extend along the axial direction of the outer barrel and are not communicated, and the plurality of second strip-shaped bulges are uniformly distributed along the circumferential direction of the outer barrel; the first strip-shaped bulges and the second strip-shaped bulges are arranged in a staggered manner to form a cooling water channel; the inner wall of the outer barrel is also provided with a third strip-shaped bulge positioned between the two second strip-shaped bulges, and the third strip-shaped bulge is tightly matched with the first strip-shaped bulge positioned between the two second strip-shaped bulges to separate the cooling water channel; the outer barrel is further provided with a water inlet and a water outlet which are communicated with the cooling water channel and are respectively positioned on two sides of the third strip-shaped bulge. The invention has the advantages of simple structure, easy production, convenient assembly and good sealing property.)

1. The utility model provides a motor frame for electric automobile which characterized in that includes: an inner cylinder and an outer cylinder which are mutually sleeved; the outer wall of the inner barrel is provided with a plurality of first strip-shaped bulges which extend along the axial direction of the inner barrel and are not communicated, and the first strip-shaped bulges are uniformly distributed along the circumferential direction of the inner barrel; the inner wall of the outer barrel is provided with a plurality of second strip-shaped bulges which extend along the axial direction of the outer barrel and are not communicated, and the plurality of second strip-shaped bulges are uniformly distributed along the circumferential direction of the outer barrel; the first strip-shaped bulges and the second strip-shaped bulges are arranged in a staggered manner to form a cooling water channel; the inner wall of the outer barrel is also provided with a third strip-shaped bulge positioned between a certain two second strip-shaped bulges, and the third strip-shaped bulge is tightly matched with the first strip-shaped bulge positioned between the two second strip-shaped bulges to separate the cooling water channel; the outer barrel is further provided with a water inlet and a water outlet which are communicated with the cooling water channel and are respectively positioned on two sides of the third strip-shaped bulge.

2. The motor housing for electric vehicle as set forth in claim 1, further comprising: the outer barrel comprises a front end cover and a rear end cover, wherein the front end cover is positioned at one end of the outer barrel and integrally formed with the outer barrel, and the rear end cover is arranged at the other end of the outer barrel.

3. The motor base for the electric vehicle as claimed in claim 2, wherein a first O-ring is provided between an end surface of the inner tube on a side close to the front end cover and the front end cover.

4. The motor base for the electric vehicle as claimed in claim 2, wherein a second O-ring is disposed between the side walls of the inner and outer cylinders on the side close to the rear end cap; and a third O-shaped sealing ring is arranged between the end surface of one side of the inner cylinder, which is close to the rear end cover, and the rear end cover.

5. The motor base for the electric vehicle as claimed in claim 4, wherein a sealant is filled between an end surface of the inner cylinder on a side close to the rear end cover and the rear end cover.

6. The motor housing for an electric vehicle according to claim 2, wherein the rear end cap is integrally formed with the inner tube.

7. The motor base for the electric vehicle as claimed in claim 6, wherein a fourth O-ring is provided between the side walls of the inner and outer cylinders on the side close to the front cover.

8. The motor base for the electric vehicle as claimed in claim 6, wherein a fifth O-ring is disposed between the side walls of the inner and outer cylinders on the side close to the rear end cap; and a sixth O-shaped sealing ring is arranged between the end surface of the outer barrel, which is close to one side of the rear end cover, and the rear end cover.

9. The motor base for the electric automobile as claimed in claim 2 or 6, wherein the inner and outer cylinders are provided with curved surface connection structures close to the front end cover, and the curved surface connection structures are matched with each other and tightly attached to each other, and the curved surface connection structures are filled with sealant.

10. The motor base for the electric automobile according to claim 1, wherein the length of the first strip-shaped protrusion is two thirds of the axial length of the inner cylinder; the length of the second strip-shaped bulges is equal to that of the first strip-shaped bulges.

Technical Field

The invention relates to the technical field of electric automobile motors, in particular to a motor base for an electric automobile.

Background

The motor is one of the core components of the electric automobile, and the motor can generate a large amount of heat during working, so that the temperature of the motor is too high. If the motor works at an overhigh temperature for a long time, the insulation of the motor can be damaged, the power density of the motor is reduced, the service life of the motor is influenced, and the motor needs to be cooled. At present, the motor cooling mode of the electric automobile generally takes liquid cooling as the main cooling mode. The motor base is provided with a spiral water channel or an axial water channel, and a cooling medium flows in the water channel to take away heat generated by the motor.

At present, a liquid cooling machine base is more used and comprises a welding machine base and a casting machine base. The welding structure consists of an inner cylinder and a thinner outer cylinder, wherein the outer circle of the inner cylinder is provided with a spiral water channel. The casting structure is formed by casting the water channel and the connector simultaneously. The outer cylinder of the welding water-cooling base is thin, and the mounting interface is welded on the outer cylinder and bears large impact load, so that the base is easy to damage, water leakage and falling of the mounting interface are easily caused. The welding seam on the outer cylinder of the water-cooled machine base has great influence on the appearance of the motor, and the polished position of the welding seam of the machine base is easy to leak water. This process is not suitable for mass production. The casting water channel is hidden in the machine base, the water channel is bent and folded in the machine base, and only two water pipe interfaces are connected with the outside. The process can be suitable for mass production, but the water channel has complex form, difficult processing, reduced yield and overhigh cost.

Disclosure of Invention

In view of the above, an object of the present invention is to provide a motor base for an electric vehicle, which has a simple structure, is easy to produce, is convenient to assemble, and has good sealing performance.

Based on the above object, the present invention provides a motor base for an electric vehicle, comprising: an inner cylinder and an outer cylinder which are mutually sleeved; the outer wall of the inner barrel is provided with a plurality of first strip-shaped bulges which extend along the axial direction of the inner barrel and are not communicated, and the first strip-shaped bulges are uniformly distributed along the circumferential direction of the inner barrel; the inner wall of the outer barrel is provided with a plurality of second strip-shaped bulges which extend along the axial direction of the outer barrel and are not communicated, and the plurality of second strip-shaped bulges are uniformly distributed along the circumferential direction of the outer barrel; the first strip-shaped bulges and the second strip-shaped bulges are arranged in a staggered manner to form a cooling water channel; the inner wall of the outer barrel is also provided with a third strip-shaped bulge positioned between a certain two second strip-shaped bulges, and the third strip-shaped bulge is tightly matched with the first strip-shaped bulge positioned between the two second strip-shaped bulges to separate the cooling water channel; the outer barrel is further provided with a water inlet and a water outlet which are communicated with the cooling water channel and are respectively positioned on two sides of the third strip-shaped bulge.

In some embodiments, the motor mount for an electric vehicle further comprises: the outer barrel comprises a front end cover and a rear end cover, wherein the front end cover is positioned at one end of the outer barrel and integrally formed with the outer barrel, and the rear end cover is arranged at the other end of the outer barrel.

In some embodiments, the inner barrel is provided with a first O-ring seal between an end face of the inner barrel adjacent to one side of the front end cap and the front end cap.

In some embodiments, a second O-ring seal is disposed between the side walls of the inner and outer barrels adjacent to the side of the rear end cap; and a third O-shaped sealing ring is arranged between the end surface of one side of the inner cylinder, which is close to the rear end cover, and the rear end cover.

In some embodiments, a sealant is filled between the end surface of the inner cylinder close to one side of the rear end cover and the rear end cover.

In some embodiments, the rear end cap is integrally formed with the inner barrel.

In some embodiments, the inner and outer barrels are provided with a fourth O-ring seal between the side walls of the side near the front end cover.

In some embodiments, a fifth O-ring seal is disposed between the side walls of the inner and outer barrels adjacent to the side of the rear end cap; and a sixth O-shaped sealing ring is arranged between the end surface of the outer barrel, which is close to one side of the rear end cover, and the rear end cover.

In some embodiments, the inner cylinder and the outer cylinder are provided with curved surface connection structures which are matched and tightly attached to each other at one side close to the front end cover, and the curved surface connection structures are filled with a sealant.

In some embodiments, the length of the first strip-shaped protrusion is two thirds of the axial length of the inner barrel; the length of the second strip-shaped bulges is equal to that of the first strip-shaped bulges.

From the above, the motor base for the electric automobile provided by the invention has the advantages that the first strip-shaped bulges and the second strip-shaped bulges which are matched with each other between the inner cylinder and the outer cylinder form the cooling water channel, the water inlet and the water outlet are correspondingly arranged, and each part has a simple structure, is easy to produce and assemble and has good sealing performance on the whole.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a motor base for an electric vehicle according to an embodiment of the invention;

FIG. 2 is a schematic view of an expanded configuration of a cooling water channel according to an embodiment of the present invention;

FIG. 3 is a schematic cross-sectional view of a motor base for an electric vehicle according to an embodiment of the present invention;

FIG. 4 is an enlarged view of a portion of the area I in FIG. 3;

FIG. 5 is a partial enlargement of area II of FIG. 3;

fig. 6 is a schematic cross-sectional structure view of a motor base for an electric vehicle according to another embodiment of the present invention;

FIG. 7 is an enlarged view of a portion of the area I in FIG. 6;

fig. 8 is a partial enlargement of the area II in fig. 6.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to specific embodiments and the accompanying drawings.

It should be noted that all the expressions like "first", "second", etc. used in the embodiments of the present invention are intended to distinguish two entities with the same name but different names or different parameters, and it should be understood that the expressions are only for convenience and should not be construed as limiting the embodiments of the present invention, and the descriptions in the following embodiments are omitted.

An embodiment of the present invention provides a motor base for an electric vehicle, and referring to fig. 1, the motor base for an electric vehicle includes: an inner cylinder 1 and an outer cylinder 2 which are mutually sleeved. The inner cylinder 1 and the outer cylinder 2 are both integrally formed cylindrical structures, and are sleeved together in a matching way to jointly form the main body part of the motor base of the embodiment.

In this embodiment, the outer wall of the inner cylinder 1 is provided with a plurality of first strip-shaped protrusions 101 which extend along the axial direction of the inner cylinder 1 and are not through; the first strip-shaped protrusions 101 are uniformly distributed along the circumferential direction of the inner cylinder 1. Correspondingly, the inner wall of the outer cylinder 2 is provided with a plurality of second strip-shaped protrusions 201 which extend along the axial direction of the outer cylinder 2 and are not communicated; the plurality of second strip-shaped protrusions 201 are uniformly distributed along the circumferential direction of the outer cylinder 2. Preferably, the length of the first strip-shaped protrusion 101 is two thirds of the axial length of the inner barrel 1, and correspondingly, the length of the second strip-shaped protrusion 201 is equal to the length of the first strip-shaped protrusion 101. The first strip-shaped bulges 101 and the second strip-shaped bulges 201 are distributed in the same mode, and when the inner barrel 1 and the outer barrel 2 are sleeved with each other, the first strip-shaped bulges 101 and the second strip-shaped bulges 201 are staggered with each other, so that the first strip-shaped bulges 101 and the second strip-shaped bulges 201 form an arrangement mode of interval staggering in the circumferential direction; based on the above arrangement, the first strip-shaped protrusions 101 and the second strip-shaped protrusions 201 separate the space between the side walls of the inner cylinder 1 and the outer cylinder 2 to form an S-shaped loop-type cooling water channel, which is shown in a specific form with reference to fig. 2.

In this embodiment, referring to fig. 1 and fig. 2, the inner wall of the outer cylinder 2 is further provided with a third strip-shaped protrusion 202 located between two second strip-shaped protrusions 201. The third strip-shaped protrusion 202 is closely matched with the first strip-shaped protrusion 101 between the two second strip-shaped protrusions 201 to separate the cooling water channel. Specifically, the end of the third strip-shaped protrusion 202 opposite to the end of the first strip-shaped protrusion 101 is tightly attached to block the cooling water channel which is originally a closed loop. Further, the outer cylinder 2 is further provided with a water inlet 3 and a water outlet 4 which are communicated with the cooling water channel and are respectively positioned at two sides of the third strip-shaped protrusion 202. When the cooling machine works, a cooling medium enters the cooling water channel from the water inlet 3, flows axially and reciprocally in the machine base, takes away heat generated by the operation of the motor, and finally flows out of the water outlet 4.

In this embodiment, referring to fig. 1, the motor base for an electric vehicle further includes: a front end cap 5 located at one end of the outer cylinder 2 and formed integrally with the outer cylinder 2, and a rear end cap 6 provided at the other end of the outer cylinder 2. The front end cover 5 and the rear end cover 6 are used for sealing the inner cylinder 1 and the outer cylinder 2 in the axial direction. Preferably, the outer cylinder 2 and the rear end cover 6 are fastened by bolts.

In this embodiment, in order to ensure that the cooling medium does not leak to the inside and outside of the motor, corresponding sealing structures are provided for the inner cylinder 1 and the outer cylinder 2. Specifically, referring to fig. 3 and 4, on the front end cover 5 side (region I marked in the figures), a first O-ring seal 7 for achieving axial sealing is provided between the end surface of the inner cylinder 1 on the side close to the front end cover 5 and the front end cover 5. The first O-shaped sealing ring 7 is arranged between the end face of the inner cylinder 1 and the front end cover 5, correspondingly, the rear end cover 6 arranged at the other end can apply axial pressure to the inner cylinder 1, so that the end face of the inner cylinder 1 is tightly attached to the front end cover 5 and extrudes the first O-shaped sealing ring 7, and the sealing performance at the end face is ensured. In addition, referring to fig. 4, in order to further improve the reliability, curved surface connection structures (positions of dotted line frames in fig. 4) which are matched with each other and are tightly attached are arranged at positions of the inner cylinder 1 and the outer cylinder 2 close to one side of the front end cover 5, and the curved surface connection structures are filled with sealant, so that the sealing effect at the area I can be further improved. Referring to fig. 3 and 5, on the side of the rear end cover 6 (marked as region II in the figures), the three parts including the inner cylinder 1, the outer cylinder 2 and the rear end cover 6 are combined, so that the axial seal and the radial seal are simultaneously arranged. Specifically, a second O-ring 8 for realizing radial sealing is arranged between the side walls of the inner cylinder 1 and the outer cylinder 2 close to one side of the rear end cover 6. And a third O-shaped sealing ring 9 for realizing axial sealing is arranged between the end surface of one side of the inner cylinder 1 close to the rear end cover 6 and the rear end cover 6. Furthermore, compared with the situation that the cooling medium leaks to the outside, the influence of the cooling medium leaking to the inside of the motor on the performance of the motor is larger, so that the sealing glue is filled between the end face of the rear end cover 6 and the end face of the inner barrel 1, and the situation that the cooling medium does not leak to the inside of the motor is further ensured.

In an alternative embodiment, referring to fig. 6, in order to further simplify the number of the components of the motor base, in this embodiment, the rear end cover 6 and the inner cylinder 1 are integrally formed as a whole, and the structures and the connection relationships of other components are the same as those of the previous embodiment. Accordingly, with respect to the above structure, the sealing structure in the present embodiment is adjusted. Referring to fig. 6 and 8, for one side of the rear end cover 6 (region II marked in the figures), since the inner cylinder 1 and the rear end cover 6 are an integral piece in this embodiment, there is no problem of leakage of the cooling medium into the motor, so the sealing structure of region II is mainly used to prevent the cooling medium from leaking out of the motor, and two O-rings are used for this part to respectively seal in the axial direction and the radial direction, specifically including: and a fifth O-shaped sealing ring 10 for realizing radial sealing is arranged between the side walls of the inner cylinder 1 and the outer cylinder 2 on the side close to the rear end cover 6. And a sixth O-shaped sealing ring 11 for realizing axial sealing is arranged between the end surface of the outer cylinder 2 close to one side of the rear end cover 6 and the rear end cover 6. Referring to fig. 6 and 7, on the front end cover 5 side (marked area I in the figures), since the axial seal is already provided between the inner cylinder 1 and the outer cylinder 2 in the area II, if the axial seal is also provided at the area I, the end face of the inner cylinder 1 cannot be well attached to the end face of the outer cylinder 2. Therefore, only a radial seal is provided in the region II, including in particular: a fourth O-ring 12 for radial sealing is arranged between the side walls of the inner cylinder 1 and the outer cylinder 2 close to the front end cover 5. In addition, in the present embodiment, curved surface connection structures that are matched and tightly attached to each other are also provided at positions of the inner cylinder 1 and the outer cylinder 2 near the front end cover 5, and the technical effect is the same as that in the foregoing embodiment.

As can be seen from the above embodiments, the motor base for the electric vehicle of the present invention has the following technical effects:

1. the front end cover and the base are integrated, so that the number of parts is effectively reduced, the assembly process is simplified, and the production efficiency is correspondingly improved.

2. The inner and outer cylinders of the machine base have simple structure, are particularly suitable for casting and forming, and can greatly reduce the casting cost.

3. The water channel in the engine base is formed by mutually matching strip-shaped convex structures arranged on the outer surface of the inner cylinder and the inner surface of the outer cylinder, and additional processing is not needed.

4. The machine base is tightly connected with the end cover through the bolts, so that the seamless connection can be realized, and the defects of water leakage, uneven welding line and appearance influence in the welding connection are avoided.

5. The water channel sealing measure between the machine base and the end cover can realize the leakage and the internal seepage of the cooling medium and realize the isolation protection between the inside and the outside of the motor.

Those of ordinary skill in the art will understand that: the discussion of any embodiment above is meant to be exemplary only, and is not intended to intimate that the scope of the disclosure, including the claims, is limited to these examples; within the idea of the invention, also technical features in the above embodiments or in different embodiments may be combined and there are many other variations of the different aspects of the invention as described above, which are not provided in detail for the sake of brevity. Therefore, any omissions, modifications, substitutions, improvements and the like that may be made without departing from the spirit and principles of the invention are intended to be included within the scope of the invention.