Rear auxiliary frame of electric automobile

Abstract

The utility model relates to the field of auxiliary frames of automobiles, in particular to a rear auxiliary frame of an electric automobile, which comprises a front cross beam and a rear cross beam which are arranged at intervals, a left longitudinal beam and a right longitudinal beam are respectively arranged at two ends between the front cross beam and the rear cross beam, and a reinforcing component for reinforcing the strength of the frame is arranged between the left longitudinal beam and the right longitudinal beam. The reinforcing assembly comprises a reinforcing cross beam arranged between the left longitudinal beam and the right longitudinal beam and front U-shaped supports welded to the two ends of the reinforcing cross beam, a rear U-shaped support is fixedly welded to one side of each front U-shaped support, and the front U-shaped supports and the rear U-shaped supports are fixed through welding. Welding is not needed, the number of parts is reduced, the length of a welding seam is shortened, welding tool investment is saved, production cost and product weight are reduced, the rigidity and strength of the auxiliary frame are improved, and the situation that the size of a frame structure is not easy to guarantee due to the fact that heat affected zones are concentrated during welding, heat is high, deformation is large after welding and welding matching is difficult is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of automobile subframe, especially to a rear subframe of electric vehicle. BACKGROUND

[0002] The subframe is a component of front and rear axles and is used as a support for supporting the front and rear axles and suspension. In a common rear subframe, all the load-bearing cross beams and longitudinal beams are formed by plate lapping and welding, but the heat-affected zone is concentrated, the heat is high, the deformation after welding is large, and the welding matching is difficult, which causes the size of the frame structure to be difficult to guarantee, affects the rigidity and strength of the subframe, and the excessive welds also increase the production cost and product weight, expand the heat-affected zone of the weld, and cause the deformation of the parts to increase and the product size to be inaccurate. SUMMARY

[0003] In order to overcome the shortcomings of the prior art, the utility model provides a rear subframe of electric vehicle, which solves the problem of the prior art that the heat-affected zone is concentrated, the heat is high, the deformation after welding is large, and the welding matching is difficult, which causes the size of the frame structure to be difficult to guarantee.

[0004] To solve the above technical problems, the utility model provides the following technical scheme:

[0005] A rear subframe of electric vehicle, comprising front cross beams and rear cross beams arranged at intervals, left longitudinal beams and right longitudinal beams arranged at both ends between the front cross beams and the rear cross beams, a reinforcing assembly arranged between the left longitudinal beams and the right longitudinal beams for reinforcing the strength of the frame, the reinforcing assembly comprising reinforcing cross beams arranged between the left longitudinal beams and the right longitudinal beams, and front U-shaped supports arranged at both ends of the reinforcing cross beams by welding, one side of the front U-shaped support being fixedly welded with a rear U-shaped support, and the front U-shaped support and the rear U-shaped support being fixed by welding, two front U-shaped supports being fixedly welded with reinforcing longitudinal beams on one side respectively, and one end of the two reinforcing longitudinal beams being fixedly welded with the left longitudinal beam and the right longitudinal beam respectively.

[0006] Further, the front cross beams and the rear cross beams are arranged as pipe beams, and the left longitudinal beams and the right longitudinal beams are arranged symmetrically at both ends of the front cross beams and the rear cross beams by welding.

[0007] Further, one end of the two reinforcing longitudinal beams is fixedly welded with C-shaped supports, and the two C-shaped supports are fixedly welded with the front cross beams at both ends respectively.

[0008] Further, both ends of the front cross beams and the rear cross beams are fixedly embedded with body sleeve pipes respectively.

[0009] Further, one side of the rear cross beam is fixedly embedded with two symmetrically arranged motor sleeve pipes.

[0010] Further, the left and right longitudinal beams each comprise an upper beam plate and a lower beam plate, and the upper and lower beam plates are fixed by welding.

[0011] Further, the inner side of the lower beam plate is fixed with a plurality of L-shaped supports distributed at intervals.

[0012] By the above technical scheme, the utility model provides a kind of electric automobile rear subframe, compared with prior art, at least have the following beneficial effects:

[0013] 1, the utility model discloses a front cross beam, rear cross beam, left longitudinal beam and right longitudinal beam end are mutually welded to form subframe main body, and the front cross beam and rear cross beam are pipe beam, do not need to weld, reduce the number of parts, shorten weld length, save welding tooling investment, reduce production cost and product weight, improve the rigidity strength of subframe, avoid the situation that framework structure size is not easy to guarantee when heat affected zone is concentrated, heat is high, postwelding deformation is big, welding matching is difficult.

[0014] 2, the utility model discloses by setting up reinforcing component to improve the strength of frame, strengthen the strength of front cross beam and left and right longitudinal beam lap joint interface, improve the carrying capacity of motor support simultaneously, strengthen the structural rigidity of front U-shaped support and rear U-shaped support, so that it has the ability of resisting greater deformation, by reinforcing longitudinal beam, front U-shaped support, rear U-shaped support and reinforcing cross beam form U-shaped frame, can reinforce the whole subframe, improve overall structural stability. BRIEF DESCRIPTION OF DRAWINGS

[0015] The drawings described herein are used to provide further understanding of the present application, and form part of the present application, the illustrative embodiments of the present application and its description are used to explain the present application, and do not constitute improper limitation on the present application. In the drawings:

[0016] Figure 1 It is the overall structure schematic view of the utility model;

[0017] Figure 2 It is the structure schematic view of reinforcing component of the utility model;

[0018] Figure 3 It is the explosion structure schematic view of left longitudinal beam of the utility model.

[0019] In the drawing: 1, front cross beam; 2, rear cross beam; 3, left longitudinal beam; 4, right longitudinal beam;

[0020] 5, reinforcing component; 51, reinforcing cross beam; 52, front U-shaped support; 53, rear U-shaped support; 54, reinforcing longitudinal beam; 55, C-shaped support;

[0021] 6, body sleeve; 7, motor sleeve; 8, upper beam plate; 9, lower beam plate; 10, L-shaped support. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] The rear subframe of an electric vehicle primarily supports the rear suspension system, including components such as springs, shock absorbers, and wheels. It connects these components to the vehicle body, ensuring their stability during driving. During driving, uneven road surfaces generate impact forces on the vehicle; the rear subframe, through the springs and shock absorbers of the suspension system, helps absorb these impacts, providing better ride comfort and handling. The design of the rear subframe also enhances the strength and rigidity of the rear of the vehicle, improving the overall structural stability of the vehicle.

[0024] Because the crossbeams and longitudinal beams of the traditional rear subframe are all welded from sheet metal, the heat-affected zone is concentrated, the heat is high, the post-weld deformation is large, and the welding matching is difficult, making it difficult to guarantee the frame structure dimensions and affecting the stiffness and strength of the subframe. In order to shorten the weld length, save on welding tooling investment, reduce production costs and product weight, such as Figure 1 - Figure 3 As shown, a rear subframe for an electric vehicle is provided, comprising a front crossbeam 1, a rear crossbeam 2, a left longitudinal beam 3, a right longitudinal beam 4, and a reinforcing component 5. The front crossbeam 1 and the rear crossbeam 2 are spaced apart, and the left longitudinal beam 3 and the right longitudinal beam 4 are respectively located at both ends between the front crossbeam 1 and the rear crossbeam 2. Both the front crossbeam 1 and the rear crossbeam 2 are tubular beams, and the ends of the left longitudinal beam 3 and the right longitudinal beam 4 are respectively welded to the front crossbeam 1 and the rear crossbeam 2. The left longitudinal beam 3 and the right longitudinal beam 4 are symmetrically arranged, and both the left longitudinal beam 3 and the right longitudinal beam 4 are made of sheet metal welded to the front crossbeam 1 and the rear crossbeam 2. The front crossbeam 1, the rear crossbeam 2, the left longitudinal beam 3, and the right longitudinal beam 4 are welded to form a U-shape to form the subframe product. The reinforcing component 5 is located between the left longitudinal beam 3 and the right longitudinal beam 4 to strengthen the frame.

[0025] Both ends of the front crossbeam 1 and the rear crossbeam 2 are respectively fixedly embedded with body sleeves 6. The body sleeves 6 make the connection between the rear subframe and the body more secure and reliable. Two symmetrically arranged motor sleeves 7 are fixedly embedded on one side of the rear crossbeam 2. The motor sleeves 7 are embedded in the rear crossbeam 2 and are welded together to form a whole. The embedded structure strengthens the overall strength of the rear crossbeam 2 and improves the load-bearing capacity for the motor. At the same time, compared with the existing technical solution, the number of parts is reduced, saving the unit cost.

[0026] In order to strengthen the strength of the front cross beam 1 and the left and right longitudinal beam 4 lap joint interface, improve the overall structure stability, as shown in Figure 2 The embodiment is specific, the reinforcing assembly 5 includes the reinforcing cross beam 51 arranged between the left longitudinal beam 3 and the right longitudinal beam 4, and the front U-shaped support 52 welded at both ends of the reinforcing cross beam 51, one side of the front U-shaped support 52 is fixedly welded with the rear U-shaped support 53, and the front U-shaped support 52 and the rear U-shaped support 53 are fixed by welding, two the front U-shaped support 52 one side is fixedly welded with the reinforcing longitudinal beam 54, and one end of the two reinforcing longitudinal beams 54 is fixedly welded with the left longitudinal beam 3 and the right longitudinal beam 4, the reinforcing longitudinal beam 54, the front U-shaped support 52, the rear U-shaped support 53 and the reinforcing cross beam 51 form a U-shaped frame, improve the overall subframe structure stability, because the rigidity of each subpart is good, and is connected and supported with each other, the rigidity is stronger after being combined into a whole, improve the rear subframe carrying capacity, one end of two the reinforcing longitudinal beam 54 is fixedly welded with the C-shaped support 55, two C-shaped supports 55 are fixedly welded with both ends of the front cross beam 1, the C-shaped support 55 can be provided as multiple, can reinforce the U-shaped frame, improve the structure stability.

[0027] The left longitudinal beam 3 and the right longitudinal beam 4 of the utility model all include upper beam plate 8 and lower beam plate 9, and upper beam plate 8 and lower beam plate 9 are fixed by welding, and a plurality of interval distribution L-shaped supports 10 are fixedly welded on the inner side of lower beam plate 9.

[0028] It should be noted that in this paper, the term "including" "containing" or any other variant thereof is intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or includes elements inherent to such process, method, article or equipment.

[0029] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. An electric vehicle rear subframe, comprising a front cross beam (1) and a rear cross beam (2) arranged at intervals, a left longitudinal beam (3) and a right longitudinal beam (4) are arranged at both ends of the front cross beam (1) and the rear cross beam (2) respectively, characterized in that: The left side frame (3) and the right side frame (4) are provided with a reinforcing assembly (5) for reinforcing the strength of the frame; The reinforcing assembly (5) comprises a reinforcing cross beam (51) arranged between the left side frame (3) and the right side frame (4), and a front U-shaped support (52) arranged at both ends of the reinforcing cross beam (51) by welding, one side of the front U-shaped support (52) is fixedly welded with a rear U-shaped support (53), and the front U-shaped support (52) and the rear U-shaped support (53) are fixed by welding, two front U-shaped supports (52) are fixedly welded with a reinforcing longitudinal beam (54) on one side respectively, and one end of the two reinforcing longitudinal beams (54) is fixedly welded with the left side frame (3) and the right side frame (4) respectively.

2. The electric vehicle rear subframe of claim 1, wherein: The front cross beam (1) and the rear cross beam (2) are arranged as pipe beams, and the left side frame (3) and the right side frame (4) are fixedly connected with the front cross beam (1) and the rear cross beam (2) at both ends by welding, and the left side frame (3) and the right side frame (4) are arranged symmetrically.

3. The electric vehicle rear subframe of claim 1, wherein: One end of the two reinforcing longitudinal beams (54) is fixedly welded with a C-shaped support (55), and the two C-shaped supports (55) are fixedly welded with the front cross beam (1) at both ends respectively.

4. The electric vehicle rear subframe of claim 1, wherein: The front cross beam (1) and the rear cross beam (2) are fixedly embedded with a body sleeve (6) at both ends respectively.

5. The electric vehicle rear subframe of claim 1, wherein: The rear cross beam (2) is fixedly embedded with two symmetrically arranged motor sleeves (7) on one side.

6. The electric vehicle rear subframe of claim 1, wherein: The left side frame (3) and the right side frame (4) each comprise an upper beam plate (8) and a lower beam plate (9), and the upper beam plate (8) and the lower beam plate (9) are fixed by welding.

7. The electric vehicle rear subframe of claim 6, wherein: The inner side of the lower beam plate (9) is fixedly welded with a plurality of interval distributed L-shaped supports (10).

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