CN112810697A

CN112810697A - Extrusion section bar and casting combined type electric vehicle front auxiliary frame

Info

Publication number: CN112810697A
Application number: CN202110082128.7A
Authority: CN
Inventors: 周长孝; 丁旷斌; 魏文锋
Original assignee: Ningbo Xintai Machinery Co Ltd
Current assignee: Ningbo Xintai Machinery Co Ltd
Priority date: 2021-01-21
Filing date: 2021-01-21
Publication date: 2021-05-18
Also published as: WO2022156506A1

Abstract

The invention belongs to the technical field of electric vehicle sub-frames, and provides an extruded profile and casting combined type electric vehicle front sub-frame, which includes a front beam, a longitudinal beam, a bracket, a rear beam, a middle beam, a butterfly beam, and a rear beam. There is a butterfly beam between the longitudinal beam, the middle beam is in the middle of the front subframe of the electric vehicle and is connected to the butterfly beam, and the butterfly beam is integrally connected with the longitudinal beam, the middle beam and the rear beam. The advantages of the present invention The butterfly beam installs the front point of the vehicle body, the middle point of the vehicle body installation, the stabilizer bar, the connection point of the steering gear, the front and rear points of the control arm on one structure, reduces the number of parts, improves the assembly accuracy, and exerts the best use of extruded profiles. The advantages of high yield, using the fluidity of the casting process, the forming is complex, the number of welds is reduced, the difficulty is lower than the overall casting of the subframe, the qualification rate is high, and the energy absorption effect is good.

Description

Extrusion section bar and casting combined type electric vehicle front auxiliary frame

Technical Field

The invention belongs to the technical field of electric vehicle auxiliary frames, and relates to an extruded section and cast combined electric vehicle front auxiliary frame.

Background

With the stricter environmental protection regulations, the pursuit of the electric vehicle for a large voyage distance, the higher the requirement of the light weight of the vehicle; the aluminum alloy process is required to be combined, and the whole vehicle arrangement of the electric vehicle is required to carry out a completely new design on the auxiliary frame structure so as to meet the performance requirement of the auxiliary frame. The existing integrally cast auxiliary frame has poor collision energy absorption effect.

Disclosure of Invention

The invention aims to solve the technical problem and provides an extruded section and a cast combined type front subframe of an electric vehicle, aiming at the current situation of the prior art, which can reduce the number of parts and the number of welding seams, improve the assembly precision and solve the problems of insufficient energy absorption and low yield of a fully cast subframe.

The technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides an auxiliary frame before combined electric motor car of extruded section and casting which characterized in that includes:

the front cross beam is positioned at the front part of the front auxiliary frame of the electric vehicle;

the longitudinal beams are positioned on the left side and the right side of the front cross beam;

the bracket is positioned between the longitudinal beam and the front cross beam, is connected with a front mounting point of the vehicle body and is also connected with the front cross beam and the longitudinal beam;

the rear cross beam is positioned at the rear part of the front auxiliary frame of the electric vehicle, and a butterfly beam is connected between the rear cross beam and the longitudinal beam;

the middle cross beam is positioned in the middle of the front auxiliary frame of the electric vehicle and connected with the butterfly beam, and the butterfly beam is connected with the longitudinal beam, the middle cross beam and the rear cross beam to form a whole.

In the extruded section and cast combined type electric vehicle front auxiliary frame, a rear suspension seat is further arranged between the middle cross beam and the rear cross beam, wherein the rear suspension seat is formed by extruding a hollow extruded section and is used for mounting a power assembly suspension.

In the extruded section and cast combined type electric vehicle front auxiliary frame, the support is in an H shape, and a power assembly suspension mounting point is arranged on the support.

In the above extruded section and cast combined type electric vehicle front auxiliary frame, the longitudinal beam comprises a left longitudinal beam and a right longitudinal beam, and the left longitudinal beam and the right longitudinal beam are respectively positioned on the left side and the right side of the front cross beam.

In the above extruded section and cast combined type electric vehicle front subframe, the bracket comprises a left front bracket and a right front bracket, wherein the left front bracket is used for connecting the front cross beam and the left longitudinal beam, and the right front bracket is used for connecting the front cross beam and the right longitudinal beam.

In the extruded section and cast combined type electric vehicle front auxiliary frame, the butterfly beam is provided with a vehicle body installation middle point, a stabilizer bar, a steering engine connecting point, a control arm front point and a rear point, the butterfly beam comprises a left butterfly beam and a right butterfly beam, the left butterfly beam is connected with a left longitudinal beam, a middle transverse beam and a rear transverse beam, and the right butterfly beam is connected with a right longitudinal beam, a middle transverse beam and a rear transverse beam.

In the above extruded section and cast combined type electric vehicle front auxiliary frame, the front cross beam, the longitudinal beam, the rear cross beam and the middle cross beam are formed by extrusion, and the bracket and the butterfly-shaped beam are formed by die casting.

Compared with the prior art, the invention has the advantages that the butterfly beam is utilized to install the front point, the middle point, the stabilizer bar, the steering engine connecting point, the front point and the rear point of the control arm on a structural member, the number of parts is reduced, the assembly precision is improved, the structural member fully exerts the advantage of high finished product rate of extruded profiles, fully utilizes the fluidity of casting technology, forms a complex profile, reduces the number of welding seams, and has lower difficulty than the integral casting of the auxiliary frame, high qualification rate and good energy absorption effect.

Drawings

Fig. 1 is a schematic structural view of the extruded section and the cast combined type electric vehicle front subframe.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments. It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "central," "lateral," "longitudinal," "front," "rear," "left," "right," "upper," "lower," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the invention and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be considered limiting to the scope of the present invention.

In the figure, a front cross member 100; the longitudinal beam 200; a left longitudinal beam 201; a right stringer 202; a support 300; a left front bracket 301; a right front bracket 302; a rear cross member 400; a middle cross member 500; a butterfly beam 600; a left butterfly beam 601; a right butterfly beam 602; the rear suspension mount 700.

As shown in fig. 1, the extruded section and cast combination type electric vehicle front subframe mainly comprises a front cross beam 100, a longitudinal beam 200, a bracket 300, a rear cross beam 400, a middle cross beam 500 and a butterfly beam 600, wherein in order to achieve light weight, the front cross beam 100, the longitudinal beam 200, the rear cross beam 400 and the middle cross beam 500 are formed by extrusion, and the bracket 300 and the butterfly beam 600 are formed by die casting, so that the advantage of high yield of the extruded section is fully exerted, the flowability of casting process is fully utilized, a complex profile is formed, and the number of connecting welding seams among the cross beam, the longitudinal beam 200, the bracket 300, the rear cross beam 400, the middle cross beam 500, the bracket 300 and the butterfly.

Specifically, the front cross beam 100 is located at the front portion of the front subframe of the electric vehicle, the longitudinal beam 200 is located on the left side and the right side of the front cross beam 100, the longitudinal beam 200 comprises a left longitudinal beam 201 and a right longitudinal beam 202, the left longitudinal beam 201 and the right longitudinal beam 202 are located on the left side and the right side of the front cross beam 100 respectively, the support 300 is located between the longitudinal beam 200 and the front cross beam 100, the support 300 is in an H shape, weight is reduced, and Z-direction rigidity is guaranteed, power assembly suspension mounting points are mounted on the support 300 and are connected through bolts in a fastening mode, the support 300 is connected with a front vehicle body mounting point and is connected with the front cross beam 100 and the longitudinal beam 200, as a further optimization, the support 300 comprises a left front support 301 and a right front support 302, the left front support 301 is used for connecting the front cross beam 100 and the left longitudinal beam 201, and the right front support.

The rear cross beam 400 is positioned at the rear part of the front auxiliary frame of the electric vehicle, and a butterfly beam 600 is connected between the rear cross beam 400 and the longitudinal beam 200; the middle cross beam 500 is positioned in the middle of the front auxiliary frame of the electric vehicle and connected with the butterfly beam 600, the rear suspension seat 700 is further arranged between the middle cross beam 500 and the rear cross beam 400, the rear suspension seat 700 is formed by extruding a hollow extruded section and is used for installing a power assembly suspension, and therefore the weight reduction effect is good, and the rigidity is strong, the biggest innovation of the patent is that the butterfly beam 600 is connected with the longitudinal beam 200, the middle cross beam 500 and the rear cross beam 400 to form a whole body, as further optimization, the butterfly beam 600 is provided with a vehicle body installation middle point, a stabilizer bar, a steering machine connecting point, a control arm front point and a rear point, the butterfly beam 600 comprises a left butterfly beam 601 and a right butterfly beam 602, the left butterfly beam 601 is connected with the left longitudinal beam 201, the middle cross beam 500 and the rear cross beam 400, the right butterfly beam 602 is connected with the right longitudinal beam 202, the middle cross beam 500 and the rear cross beam 400, namely, the middle, improve the lateral rigidity of sub vehicle frame, provide the support for rear suspension seat 700 simultaneously, sub vehicle frame is with the automobile body installation mid point before the electric motor car of above structural design, the stabilizer bar, the steering gear tie point, a plurality of mounting points of control arm front point and rear point, link together with butterfly-shaped roof beam 600, can reduce the quantity of part, reduce welding deformation, can wholly subtract heavy 30% and lightweight requirement, to reducing energy consumption, improve continuation of the journey mileage and great help, the qualification rate is high, the casting degree of difficulty has been reduced, can satisfy the mode, rigidity requirement, intensity CAE requires.

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

Claims

1. A front subframe of an extruded profile and a casting combined type electric vehicle, characterized in that, comprising:

The front cross member is located at the front of the front subframe of the electric vehicle;

Longitudinal members, located on the left and right sides of the front cross member;

The bracket is located between the longitudinal beam and the front beam, and the bracket is connected with the front point of the vehicle body installation, and at the same time is connected with the front beam and the longitudinal beam;

The rear beam is located at the rear of the front subframe of the electric vehicle, and a butterfly beam is connected between the rear beam and the longitudinal beam;

The middle beam is located in the middle of the front subframe of the electric vehicle and is connected to the butterfly beam, and the butterfly beam is connected with the longitudinal beam, the middle beam and the rear beam to form a whole.

2 . The front subframe of an extruded profile and casting combined type electric vehicle according to claim 1 , wherein a rear suspension seat is further arranged between the middle beam and the rear beam, wherein the rear suspension seat Extruded from hollow extruded profiles and used to mount powertrain mounts.

3. The front subframe of an extruded profile and casting combined type electric vehicle according to claim 1 or 2, wherein the bracket is H-shaped, and a powertrain suspension is installed on the bracket mount point.

4. A combined extruded profile and casting electric vehicle front subframe according to claim 3, wherein the longitudinal beam comprises a left longitudinal beam and a right longitudinal beam, a left longitudinal beam and a right longitudinal beam On the left and right sides of the front cross member, respectively.

5. A combined extruded profile and casting electric vehicle front subframe according to claim 4, wherein the bracket comprises a left front bracket and a right front bracket, wherein the left front bracket is used for connecting The front beam and the left longitudinal beam, and the right front bracket is used for connecting the front beam and the right longitudinal beam.

6. The front subframe of an extruded profile and casting combined type electric vehicle according to claim 5, wherein the butterfly beam has a body mounting midpoint, a stabilizer bar, a steering gear connection point, The front and rear points of the control arm, the butterfly beam includes a left butterfly beam and a right butterfly beam, the left butterfly beam is connected to the left longitudinal beam, the middle beam and the rear beam, and the right butterfly beam is connected to the right longitudinal beam beam, middle beam and rear beam.

7 . The front subframe of an extruded profile and casting combined type electric vehicle according to claim 6 , wherein the front beam, the longitudinal beam, the rear beam and the middle beam are extruded, and the The bracket and butterfly beam are die-casting.