CN217804171U

CN217804171U - Inverter housing, electric drive axle connection structure and vehicle

Info

Publication number: CN217804171U
Application number: CN202221405939.2U
Authority: CN
Inventors: 李志强
Original assignee: Beijing CHJ Automobile Technology Co Ltd
Current assignee: Beijing CHJ Automobile Technology Co Ltd
Priority date: 2022-06-06
Filing date: 2022-06-06
Publication date: 2022-11-15
Anticipated expiration: 2032-06-06

Abstract

The application provides an inverter housing, transaxle connection structure and vehicle, inverter housing include the suspension portion of inverter shell portion and being used for connecting the sub vehicle frame, inverter shell portion with suspension portion integrated into one piece connects. The application provides an inverter housing, electric drive axle connection structure and vehicle through with mutual independent current inverter housing and suspension structural design in the correlation technique for integrated into one piece structure, fundamentally has solved the adoption screw connection and the structural problem that causes. Because the inverter shell part and the suspension part are integrally formed, mounting structures do not need to be reserved for fasteners such as screws and the like, the overall size, particularly the thickness, is smaller, the weight is lighter, the flexibility is higher in structural design, and the whole vehicle arrangement is facilitated. Meanwhile, the problems of stress concentration and material yield caused by axial pre-tightening of the screw are avoided. In addition, because the assembly between the inverter shell part and the suspension part is not needed, the assembly process is facilitated to be simplified, and the assembly efficiency is improved.

Description

Inverter housing, electric drive axle connection structure and vehicle

Technical Field

The application relates to the technical field of vehicles, in particular to an inverter shell, an electric drive axle connecting structure and a vehicle.

Background

The electric drive axle of the new energy automobile is generally connected with the automobile body and the chassis through the suspension structure 1, and the purpose of the electric drive axle is to absorb and reduce the vibration response of the excitation such as the concave-convex road surface and the like on the electric drive axle through a rubber damping part on the suspension structure 1, so that the durability and the reliability of the structure and the function of key parts of the electric drive axle to continuous vibration are improved in the actual use process.

The electric drive axle outer casing mainly comprises current inverter housing 3, gear box casing and motor casing, and it connects the sub vehicle frame through suspension structure 1. The postures of the electric drive axle in the auxiliary frame may cause different shells to be connected and matched with the suspension structure 1 in the three shells due to different arrangement of the whole vehicle, and for the occasions that the existing inverter shell 3 needs to be connected with the suspension structure 1, the suspension support in the related art is mutually independent from the existing inverter shell 3 as the suspension structure 1, one end of the suspension support is in hard connection with the existing inverter shell 3 through a screw 2, and the other end of the suspension support is in flexible connection with the auxiliary frame through a rubber bushing, as shown in fig. 1. The above-described connection structure has the following disadvantages:

(1) In order to ensure the connection strength of the existing inverter housing 3 and the suspension bracket, the engagement length of the screw 2 is usually long, and the screw needs to be inserted

Invade the inside of the existing inverter shell 3, which is very unfavorable for the arrangement, modularization and platform design of the components inside the inverter;

(2) The screw 2 connecting structure is influenced by material collapse and the like due to temperature, material yield and pretightening force under large impact load

The joint surface of the suspension bracket and the existing inverter shell 3 has a slippage risk;

(3) The screw 2 is connected with a large axial pretightening force, and in order to ensure that the material is not yielded, the existing inverter shell 3 is matched with the suspension bracket

The surface is usually large, and the material consumption is large corresponding to the thicker material of the existing inverter shell 3;

(4) The rigidity of the joint part of the screw 2 connecting suspension bracket and the existing inverter shell 3 is generally lower, and the vibration excitation on the same road surface is transmitted

The vibration response caused on the electric drive bridge is larger, the vibration reliability of the electric drive bridge component is required to be higher, and simultaneously the electric drive bridge component is electrically connected

The NVH (Noise, vibration, harshness, noise, vibration and Harshness) performance of the drive axle is worse;

(5) To ensure the strength of the suspension bracket, the suspension bracket is usually thick and heavy, which means that the electric drive axle is added with the suspension bracket

The occupied space behind the frame is larger, the structure is more inflexible, the whole vehicle arrangement is more difficult, and meanwhile, the power density of the electric drive axle is also reduced;

(6) The suspension bracket and the auxiliary frame are assembled in advance before the electric drive axle is assembled, wherein suspension positioning and screw 2 torque are involved

Monitoring, cleanliness control and the like; meanwhile, more materials are used, so that the equipment investment and the process management and control of a factory are not facilitated.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problems or at least partially solve the technical problems, the application provides an inverter housing, an electric drive axle connecting structure and a vehicle, so as to avoid the problems caused by the fact that the inverter housing is connected with a suspension bracket through screws.

In view of the above, the present application provides an inverter housing including an inverter case portion and a suspension portion for connecting a subframe, the inverter case portion and the suspension portion being integrally connected.

Further, the inverter case is provided with ribs continuously in a first direction from the suspending portion toward the inverter case portion.

Furthermore, the reinforcing rib comprises a first rib group extending along the first direction and a second rib group distributed at intervals along the first direction, and the first rib group is intersected with the second rib group.

Further, the first rib group comprises a plurality of first reinforcing ribs in a radial structure.

Further, a height of the first bead adjacent to the suspension portion is greater than a height of the first bead adjacent to the inverter case portion.

Further, the second rib group comprises a plurality of arc-shaped second reinforcing ribs, and the circle centers of the second reinforcing ribs face the suspension portion.

Further, the suspension part is provided with a first mounting hole, and one end of the first reinforcing rib is close to the first mounting hole; the inverter casing is provided with a second mounting hole, and the first reinforcing rib and/or the second reinforcing rib are close to or pass through the second mounting hole.

Further, a bottom of the suspension portion is higher than a bottom of the inverter case portion in a thickness direction of the inverter case, and a plurality of third reinforcing ribs are provided between the bottom of the suspension portion and a side wall of the inverter case portion.

Based on the same inventive concept, the present application further provides an electric drive axle connection structure, including: the suspension rubber piece and the above-mentioned inverter housing, the suspension rubber piece with the first mounting hole interference fit of suspension portion is connected.

Based on the same inventive concept, the application also provides a vehicle comprising the electric drive axle connecting structure.

The application provides an inverter housing, electric drive axle connection structure and vehicle through with mutual independent current inverter housing and suspension structural design in the correlation technique for integrated into one piece structure, fundamentally has solved the adoption screw connection and the structural problem that causes. In this application, because inverter shell portion and suspension portion are integrated into one piece, no longer need reserve mounting structure for fasteners such as screws, therefore whole volume especially thickness is less, and weight is lighter, and the flexibility is also higher when structural design, is favorable to whole car to be arranged. Meanwhile, the problems of stress concentration and material yield caused by axial pre-tightening of the screw are avoided. In addition, because the assembly between the inverter shell part and the suspension part is not needed, the assembly process is facilitated to be simplified, and the assembly efficiency is improved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the principles of the application and not to limit the application. In the drawings:

fig. 1 is a schematic view of a connection structure of a related art suspension structure and a conventional inverter case;

FIG. 2 is a schematic view of an inverter housing of an embodiment of the present application;

fig. 3 is a schematic view of another direction of an inverter case according to an embodiment of the present application;

FIG. 4 is a schematic view of another orientation of the inverter housing of an embodiment of the present application;

fig. 5 is a schematic view of an electric drive axle connection structure according to an embodiment of the present application.

Description of reference numerals:

1. a suspension structure; 2. a screw; 3. an existing inverter housing; 4. a suspension part; 5. an inverter case portion; 6. reinforcing ribs; 61. a first rib group; 611. a first reinforcing rib; 62. a second rib group; 621. a second reinforcing rib; 7. a third reinforcing rib; 8. suspending a rubber member; 9. a first mounting hole; 10. and a second mounting hole.

Detailed Description

In order that the above-mentioned objects, features and advantages of the present application may be more clearly understood, the solution of the present application will be further described below. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application, but the present application may be practiced in other ways than those described herein; it is to be understood that the embodiments described in this specification are only some embodiments of the present application and not all embodiments.

In view of this, as shown in fig. 2, an embodiment of the present application provides an inverter case, including: an inverter casing portion 5 and a suspension portion 4 for connecting a subframe, the inverter casing portion 5 and the suspension portion 4 being integrally molded and connected.

Optionally, the inverter casing 5 and the suspension 4 are made of the same material, and are made of a die-cast aluminum material, and the two parts can be integrally formed together by integral die-casting.

The inverter housing provided by the embodiment fundamentally solves the structural problem caused by the connection of the screws 2 by designing the existing inverter housing 3 and the suspension structure 1 which are mutually independent in the related art into an integrally formed structure. In the inverter housing provided by the embodiment, because the inverter housing part 5 and the suspension part 4 are integrally formed, mounting structures do not need to be reserved for fasteners such as screws 2 and the like, the overall size, particularly the thickness, is small, the weight is light, the flexibility is high in structural design, and the whole vehicle arrangement is facilitated. Meanwhile, the problems of stress concentration and material yield caused by axial pre-tightening of the screw 2 are avoided. In addition, since no assembly is required between the inverter case portion 5 and the suspension portion 4, it is advantageous to simplify the assembly process and to improve the assembly efficiency.

As shown in fig. 2, in some embodiments, the inverter case is provided with the reinforcing beads 6 continuously in a first direction from the suspending portion 4 toward the inverter case portion 5 (i.e., x direction in fig. 2).

Alternatively, the suspending portion 4 is provided on one side of the inverter case portion 5 in a direction perpendicular to the thickness of the inverter case. Wherein the inverter case thickness direction is the y direction in fig. 2 and 3.

In order to make the structure of the suspension portion 4 itself, the structure of the inverter case portion 5 itself, and the connection structure therebetween of the inverter case of the present embodiment have high strength and dynamic rigidity, a reinforcing rib 6 is provided on the outer side (the side close to the sub-frame or the chassis) of the inverter case of the present embodiment. The beads 6 are distributed from the overhang 4 to the inverter case 5 through the connecting position of the overhang 4 and the inverter case 5.

As shown in fig. 2, in some embodiments, the reinforcing ribs 6 include a first rib group 61 extending along the first direction, and a second rib group 62 spaced along the first direction, and the first rib group 61 intersects with the second rib group 62.

The first rib group 61 is integrally connected to both the suspension portion 4 and the inverter case portion 5, further improving the strength and dynamic rigidity of the suspension portion 4, the inverter case portion 5, and the connection structure therebetween, at least in the first direction. The second rib group 62 intersects with the first rib group 61, and the two rib groups cooperate with each other to make the reinforcing rib 6 have a net structure, so that the reinforcing effect of the reinforcing rib 6 on the suspension part 4, the inverter shell part 5, and the connecting position therebetween is further improved.

As shown in fig. 2, in some embodiments, the first rib group 61 includes a plurality of first reinforcing ribs 611 in a radial configuration.

Since the outer side area of the suspension portion 4 is smaller than the outer side area of the inverter case 5, in order to enable the first reinforcing ribs 611 to simultaneously connect the suspension portion 4 and the inverter case 5 having a difference in area, the plurality of first reinforcing ribs 611 are arranged in a radial structure with the suspension portion 4 side as the center side, so that a certain included angle is formed between two adjacent first reinforcing ribs 611. Thus, while ensuring that the first reinforcing ribs 611 can simultaneously connect the suspension portion 4 and the inverter casing portion 5, the first rib group 61 as a whole has a larger coverage, and the reinforcing effect of the first rib group 61 on the inverter casing of the embodiment in terms of strength and dynamic stiffness is further improved.

As shown in fig. 3, in some embodiments, the height of the first reinforcing bead 611 near the suspension portion 4 (e.g., the height a in fig. 3) is greater than the height of the first reinforcing bead 611 near the inverter case portion 5 (e.g., the height b in fig. 4).

Optionally, the first reinforcing rib 611 smoothly transitions from high to low.

In the actual use process, the requirement on the rigidity of the suspension portion 4 is high, so the height of the first reinforcing rib 611 portion close to the suspension portion 4 is also high, the corresponding reinforcing effect on the suspension portion 4 is good, and the rigidity of the suspension portion 4 can be ensured to meet the design requirement.

As shown in fig. 2, in some embodiments, the second rib group 62 includes a plurality of arc-shaped second reinforcing ribs 621, and the center of the second reinforcing ribs 621 faces the suspension portion 4.

The arc-shaped second reinforcing ribs 621 have a better reinforcing effect on the suspension portion 4 and the inverter case portion 5 than the linear reinforcing ribs, enabling higher enhancement of the performance of the inverter case of the present embodiment, such as strength and rigidity.

As shown in fig. 2, in some embodiments, the suspension 4 is provided with a first mounting hole 9, and one end of the first reinforcing rib 611 is close to the first mounting hole 9; the inverter case 5 is provided with a second mounting hole 10, and the first reinforcing rib 611 and/or the second reinforcing rib 621 approach or pass through the second mounting hole 10.

Optionally, the axial directions of the first mounting hole 9 and the second mounting hole 10 are both the thickness direction of the inverter housing.

Alternatively, the first mounting hole 9 is used for mounting the suspension rubber 8, and the second mounting hole 10 is used for mounting a fastener.

Optionally, the second mounting hole 10 is a threaded hole or a smooth hole.

As exemplarily illustrated in fig. 2, one end of the first reinforcing rib 611 is adjacent to the first mounting hole 9, an end of the second reinforcing rib 621 is adjacent to the second mounting hole 10, and an intersection point where the first reinforcing rib 611 and the second reinforcing rib 621 intersect may coincide with or be adjacent to the second mounting hole 10.

In general, the rigidity of the die cast part is high at the position where the mounting hole is provided. The mesh-like beads 6 composed of the first beads 611 and the second beads 621 connect the first mounting hole 9 and the second mounting hole 10, that is, connect the suspension portion 4 and the inverter case portion 5 at a position where the rigidity is high, and have a reinforcing effect on structural performance such as the natural frequency and the rigidity of the entire inverter case of the present embodiment.

As shown in fig. 3 and 4, in some embodiments, the bottom of the suspension portion 4 is higher than the bottom of the inverter case portion 5 in the thickness direction of the inverter case, and a plurality of third reinforcing beads 7 are further provided between the bottom of the suspension portion 4 and the side wall of the inverter case portion 5.

Alternatively, the third reinforcing rib 7 is located on the side of the overhang 4 away from the first reinforcing rib 611.

Since the requirement for the rigidity of the suspension portion 4 is high, the third reinforcing rib 7 is additionally arranged at the connecting position of the suspension portion 4 and the inverter case portion 5, and the strength and rigidity of the structure at the connecting position are further improved.

Based on the same inventive concept and in combination with the description of the inverter housing of each of the above embodiments, this embodiment provides an electric drive axle connection structure, which has the corresponding technical effects of the inverter housing of each of the above embodiments, and is not described herein again.

As shown in fig. 5, an electric drive axle connection structure includes a suspension rubber member 8, and the inverter housing of any of the above embodiments, the suspension rubber member 8 is in interference connection with the first mounting hole 9 of the suspension portion 4.

Based on the same inventive concept and in combination with the description of the electric drive axle connection structure of the above embodiment, this embodiment provides a vehicle having the corresponding technical effects of the electric drive axle connection structure of the above embodiment, which is not described herein again.

A vehicle includes the electric drive axle connection structure of the above embodiment.

It is noted that, in this document, relational terms such as "first" and "second," and the like, may be 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. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, 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 process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising a … …" does not exclude the presence of another identical element in a process, method, article, or apparatus that comprises the element.

Claims

1. The utility model provides an inverter shell, its characterized in that includes inverter shell portion and the suspension portion that is used for connecting the sub vehicle frame, inverter shell portion with suspension portion integrated into one piece connects.

2. The inverter case according to claim 1, wherein the inverter case is provided with the reinforcing ribs continuously in a first direction from the overhang portion toward the inverter case portion.

3. The inverter case according to claim 2, wherein the reinforcing ribs include a first rib group extending in the first direction, and a second rib group spaced apart in the first direction, the first rib group intersecting the second rib group.

4. The inverter case according to claim 3, wherein the first bead set includes a plurality of first beads in a radial structure.

5. The inverter case according to claim 4, wherein a height of the first bead near the overhang portion is greater than a height of the first bead near the inverter case portion.

6. The inverter case according to claim 3, wherein the second rib group includes a plurality of arc-shaped second reinforcing ribs, a center of which is directed toward the overhang portion.

7. The inverter case according to claim 4, wherein the second rib group includes a plurality of arc-shaped second reinforcing ribs, a center of which is directed toward the suspending portion;

the suspension part is provided with a first mounting hole, and one end of the first reinforcing rib is close to the first mounting hole;

the inverter shell is provided with a second mounting hole, and the first reinforcing rib and/or the second reinforcing rib are close to or pass through the second mounting hole.

8. The inverter case according to claim 1, wherein a bottom portion of the overhang is higher than a bottom portion of the inverter case portion in a thickness direction of the inverter case, and a plurality of third beads are provided between the bottom portion of the overhang and a side wall of the inverter case portion.

9. An electric drive axle connection structure, comprising: a suspension rubber member, and the inverter case according to any one of claims 1 to 8, the suspension rubber member being in interference connection with the first mounting hole of the suspension portion.

10. A vehicle characterized by comprising the electric drive axle connection structure according to claim 9.