CN110116761A - The structure of floor reinforced frame after a kind of electric car - Google Patents

Abstract

The invention belongs to the technical field of electric vehicle body structures, and in particular relates to a structure of a rear floor reinforcement frame of an electric vehicle. Instead of the traditional single frame structure, 3 longitudinal beams and 3 cross beams are used to overlap vertically and horizontally to form a frame, which can effectively improve the rigidity and strength of the frame, improve the mode, and improve the interior space accordingly. At the same time, it can Reduce cost and weight. A structure for a rear floor reinforcement frame of an electric vehicle, comprising a left longitudinal beam assembly, a right longitudinal beam assembly, a left longitudinal beam rear section assembly, a right longitudinal beam rear section assembly, a front cross beam assembly, a middle cross beam assembly, Rear crossbeam assembly, rear crossbeam right section assembly, middle crossbeam left section assembly, middle crossbeam right section assembly, left small longitudinal beam assembly, right small longitudinal beam assembly; the above structures are grooves in the shape of concave characters Structure: left longitudinal beam assembly and right longitudinal beam assembly are arranged in parallel with one left and one right, the left longitudinal beam rear section assembly is arranged at the head end of the left longitudinal beam assembly, and the right longitudinal beam rear section assembly is arranged at the right longitudinal beam assembly head end .

Description

A structure of electric vehicle rear floor reinforcement frame

technical field

The invention belongs to the technical field of electric vehicle body structures, and in particular relates to a structure of a rear floor reinforcement frame of an electric vehicle.

Background technique

At present, the world is facing energy and environmental issues. Electric vehicles are the future development trend, and will gradually replace traditional gasoline vehicles in the future. Therefore, electric vehicles need better lightweight, better safety, and more reliable body structures;

The floor structure has high strength and good stiffness mode, providing customers with reliable tools, no cracking of the floor, reducing vibration and noise, and users have a more comfortable ride experience; lower cost, so that more users can afford it, Reduce after-sales maintenance costs; lighter weight, reduce energy loss, increase cruising range; at the same time provide passengers with more space, improve comfort, and can hold more luggage items at the same time.

Contents of the invention

In order to achieve the above purpose, the present invention designs a reinforced frame structure, which changes the traditional single frame structure, adopts 3 longitudinal beams and 3 cross beams to overlap vertically and horizontally to form a frame, effectively improves the rigidity and strength of the frame, and can The mode is improved, and the interior space of the car is improved accordingly, while the cost and weight can also be reduced.

In order to achieve the above object, the present invention has adopted following scheme:

A structure for a rear floor reinforcement frame of an electric vehicle, comprising a left longitudinal beam assembly, a right longitudinal beam assembly, a left longitudinal beam rear section assembly, a right longitudinal beam rear section assembly, a front cross beam assembly, a middle cross beam assembly, Rear crossbeam assembly, rear crossbeam right section assembly, middle crossbeam left section assembly, middle crossbeam right section assembly, left small longitudinal beam assembly, right small longitudinal beam assembly; the above structures are grooves in the shape of concave characters structure;

The left longitudinal beam assembly and the right longitudinal beam assembly are arranged in parallel with one left and one right, the left longitudinal beam rear section assembly is arranged at the head end of the left longitudinal beam assembly, and the right longitudinal beam rear section assembly is arranged at the right longitudinal beam assembly head end;

After the right section assembly of the rear crossbeam and the rear crossbeam assembly are welded to each other, they are transversely connected to the head ends of the rear section assembly of the left longitudinal beam and the rear section of the right longitudinal beam;

The left section assembly of the middle crossbeam, the middle crossbeam assembly and the right section assembly of the middle crossbeam are combined from left to right. 7 After welding, they are horizontally arranged in the middle of the rear section assembly of the left longitudinal beam and the rear section of the right longitudinal beam;

And the right longitudinal beam assembly and the left longitudinal beam assembly are provided with triangular or trapezoidal bridging clamps at the tail ends, and the front beam assembly is horizontally erected on the bridging clamps and then welded and connected as a whole;

The rear crossbeam assembly is also vertically provided with at least two sections of the left small longitudinal beam assembly and the right small longitudinal beam assembly, which are respectively lapped to the left section assembly of the middle crossbeam and the right section assembly of the middle crossbeam superior.

Preferably, the structures of the left side beam assembly and the right side beam assembly are consistent, and are L-shaped or Z-shaped.

As a preferred middle beam left section assembly is welded below the inner side of the bridging clamping plate.

As a preferred cross-section of the left section assembly of the middle crossbeam and the right section of the middle crossbeam, the cross section is in a concave shape, with a large front opening and a small rear opening. Bridge the underside of the cardboard inside.

Preferably, the right section assembly of the rear beam is a 7-shaped curved bar structure, the head end of the 7-shaped curved bar structure is welded to the rear section assembly of the left longitudinal beam, and the tail end is extended horizontally and welded to the rear beam assembly, and the rear The beam assembly accounts for 80% of the length after connection.

As a preferred structure, the left small longitudinal beam assembly and the right small longitudinal beam assembly are consistent in structure, and are sheet-shaped, and there are compression-resistant edges folded upwards on both sides around the main body, wherein the diameter of the head end and the tail end is small, and the diameter of the middle is large. , the welding head at the head end and the welding tail at the tail end are respectively welded to the middle beam assembly and the rear beam assembly. The area is small.

Further, the middle crossbeam assembly and the left section assembly of the middle crossbeam and the right section assembly of the middle crossbeam are welded, and the overlapping joint is a row of welding spots, and the width of the welding side is 15mm.

Further, the left section assembly of the middle beam and the right section assembly of the middle beam are welded, and are overlapped with the left longitudinal beam assembly and the right longitudinal beam assembly by spot welding, and the width of the welding edge is 18mm.

Further, the left longitudinal beam assembly and the rear section assembly of the left longitudinal beam are composed of longitudinal ribs designed on the left rear longitudinal beam assembly to improve the X-direction collision performance and prevent wrinkling ribs for stamping.

Furthermore, the left longitudinal beam assembly and the left section assembly of the middle beam are first welded into a T-shaped structure, and the right longitudinal beam assembly and the left section assembly of the middle beam are first welded into a T-shaped structure, which is more conducive to the overlapping of the floor middle beam. Increase the rigidity of the frame.

Furthermore, the three beams of the front beam assembly, the middle beam assembly and the rear beam assembly are arranged in parallel, which is beneficial to improve the stiffness of the frame in the Y direction;

Furthermore, the rear crossbeam assembly and the right section assembly of the rear crossbeam are connected together by welding, which is beneficial to improve the process performance.

Furthermore, the rear beam assembly and the right section assembly of the rear beam adopt a concave design, which effectively increases the interior space of the vehicle.

Furthermore, the front and rear bodies of the left longitudinal beam assembly and the rear section assembly of the left longitudinal beam, as well as the front and rear bodies of the right longitudinal beam assembly and the rear section assembly of the right longitudinal beam adopt different material thickness designs. The material thickness of the front body of the rear longitudinal beam is 1.8mm, and The material thickness of the rear section of the longitudinal beam is 1.5mm; it is more beneficial to improve the collision performance, the rear part absorbs energy, and the front part is strengthened;

Further, the left section assembly of the middle crossbeam is overlapped front and rear with the middle crossbeam assembly and the rear crossbeam assembly, and the right section assembly of the rear crossbeam is overlapped front and rear with the middle crossbeam assembly and the rear crossbeam assembly, so that the middle crossbeam assembly and the rear crossbeam assembly The rear beam assembly forms an "I"-shaped joint, which has good frame force transmission structural performance.

The structure of the reinforced frame has the following beneficial effects:

1. The left and right rear longitudinal beams are connected by three beams to form a closed frame structure, which increases the force transmission performance of the lateral and longitudinal beams and provides a stable frame structure.

2. The longitudinal beam is divided into front and rear sections, the front section is strengthened, and the rear section is weakened, which is beneficial to improve the collision performance.

3. Two small longitudinal beams are connected between the middle beam and the rear beam to enhance the structural performance of the frame and improve the modality at the same time.

4. The middle beam is changed to a 3-section structure, and the cross-section of the joints at both ends is enlarged to improve the force transmission structure of the Y-direction joints.

5. The present invention changes the traditional single opening frame, adopts a closed double-ring frame structure, and adds a small frame in the large frame, which effectively improves the rigidity and strength performance of the frame. At the same time, the process performance of the body is improved, and the cost and weight are reduced.

Description of drawings

Fig. 1: top view of frame structure of the present invention;

Fig. 2: side view of frame structure of the present invention;

Fig. 3: rear view of frame structure of the present invention;

Fig. 4: isometric view of frame structure of the present invention;

Figure 5: A partial sectional view of A-A in Figure 3;

Figure 6: Partial cross-sectional view of B-B in Figure 3.

Figure 7: Partial sectional view of C-C in Figure 3.

Figure 8: Partial sectional view of D-D in Figure 3.

Explanation of reference signs:

1—left longitudinal beam assembly, 2—right longitudinal beam assembly, 3—left longitudinal beam rear section assembly, 4—right longitudinal beam rear section assembly, 5—front cross beam assembly, 6—middle cross beam assembly, 7—Rear beam assembly, 8—Right section assembly of rear beam, 9—Left section assembly of middle beam, 10—Right section assembly of middle beam, 11—Left small longitudinal beam assembly, 12—Right small longitudinal beam assembly to make;

X—the left and right direction, that is, the horizontal direction of the vehicle body; Y—the front and rear direction, that is, the longitudinal direction of the vehicle body; Z—the up and down direction.

Detailed ways

Below in conjunction with accompanying drawing, the present invention will be further described:

The connection methods described in the following embodiments of the present invention are the most common welding and bolt connections and crimping in the field; the shaping or setting is folding and water swelling or stamping shaping;

Figure 1-2 shows the structure of a rear floor reinforcement frame of an electric vehicle, including left longitudinal beam assembly 1, right longitudinal beam assembly 2, left longitudinal beam rear section assembly 3, right longitudinal beam rear section assembly 4, Front beam assembly 5, middle beam assembly 6, rear beam assembly 7, rear beam right section assembly 8, middle beam left section assembly 9, middle beam right section assembly 10, left small longitudinal beam assembly 11, Right small longitudinal beam assembly 12; firstly, the above-mentioned structure is a concave-shaped groove structure, and the sheet metal is stamped and expanded to form by using the water expansion method or stamping method;

The left longitudinal beam assembly 1 and the right longitudinal beam assembly 2 are arranged in parallel with one left and one right, the left longitudinal beam rear section assembly 3 is arranged at the head end of the left longitudinal beam assembly, and the right longitudinal beam rear section is arranged at the right longitudinal beam assembly head end Assembly 4; there are two differences between this and the prior art. One is that the rear section assembly 3 of the left longitudinal beam and the rear section assembly 4 of the right longitudinal beam are additionally welded and shaped; because different models have different length requirements, we can The same left longitudinal beam assembly 1 and right longitudinal beam assembly 2 can be prepared, but left longitudinal beam rear section assembly 3 and right longitudinal beam rear section assembly 4 of different lengths can be produced for matching, so we can There is no need to repeatedly produce different left longitudinal beam assemblies 1 and right longitudinal beam assemblies 2, resulting in confusing matching; it can adapt to many matching types;

After the rear crossbeam right section assembly 8 and the rear crossbeam assembly 7 are welded to each other, they are transversely connected to the head ends of the left longitudinal beam rear section assembly 3 and the right longitudinal beam rear section assembly 4; the structure of this section is the same as that described above The splicing principle is also the same. The length of the rear beam assembly 7 can be adjusted arbitrarily. The right section assembly 8 of the rear beam maintains the original structure. After the rear beam assembly 7 is made into the required length, the two can be welded together. The benefits of Dacheng’s multiple matching types;

The left section assembly 9 of the middle beam, the assembly 6 of the middle beam, and the right section assembly 10 of the middle beam are assembled from left to right. The middle position; the setting of the situation here is also the same, and the left section assembly 9 of the middle crossbeam and the right section assembly 10 of the middle crossbeam can be adjusted arbitrarily;

And the right longitudinal beam assembly 2 and the left longitudinal beam assembly end are provided with a triangular or trapezoidal bridging clamp 101, and the front beam assembly 5 is horizontally erected on the bridging clamping plate and then welded and connected as a whole;

The rear beam assembly 7 is also vertically provided with at least two sections of the left small longitudinal beam assembly 11 and the right small longitudinal beam assembly 12 with the same structure, which are respectively lapped to the left section assembly 9 of the middle cross beam and the middle cross beam On the right section assembly 10. The bridging clamps and the left small longitudinal beam assembly 11 and the right small longitudinal beam assembly 12 are mainly used for the top horizontal force component and vertical separation, and they can withstand greater stress and have a stronger structure.

Preferably, the left side beam assembly 1 and the right side beam assembly 2 have the same structure, and are L-shaped or Z-shaped.

As preferred, the left section assembly 9 of the middle beam is welded below the inside of the bridging clamping plate 101 .

As a preferred cross-section of the left section assembly 9 of the middle beam and the right section assembly 10 of the middle beam, the cross-section is in a concave shape, the front opening is large, and the rear opening is small. The sheet is welded under the inner side of the bridging card board 101.

Preferably, the right section assembly of the rear beam is a 7-shaped curved bar structure, the head end of the 7-shaped curved bar structure is welded to the rear section assembly of the left longitudinal beam, and the tail end is extended horizontally and welded to the rear beam assembly, and the rear The beam assembly accounts for 80% of the length after connection.

Preferably, the left small longitudinal beam assembly 11 and the right small longitudinal beam assembly 12 have the same structure and are sheet-like. The diameter is large, the welding head at the head end and the welding tail at the tail end are respectively welded to the middle beam assembly 6 and the rear beam assembly 7. The area of the welding head lapped to the rear beam assembly 7 is large, and The area of the solder tail into 6 is small.

Further, the center beam assembly 6 is welded to the left section assembly 9 of the center beam and the right section assembly 10 of the center beam, and the overlapping joint is a row of welding spots, and the width of the welding edge is 15mm.

Further, the middle crossbeam left section assembly 9 and the middle crossbeam right section assembly 10 are welded, and are overlapped with the left longitudinal beam assembly 1 and the right longitudinal beam assembly 2 by spot welding, and the welding side width is 18mm.

Further, the left longitudinal beam assembly 1 and the left longitudinal beam rear section assembly 3 are composed of longitudinal ribs designed on the left rear longitudinal beam assembly to improve the X-direction collision performance and prevent wrinkling ribs for stamping.

Further, the left longitudinal beam assembly 1 and the middle cross beam left section assembly 9 are first welded into a T-shaped structure, and the right side beam assembly 2 and the middle cross beam left section assembly 10 are first welded into a T-shaped structure, which is more conducive to the floor middle beam The lap joints increase the rigidity of the frame.

Further, the three beams of the front beam assembly 5, the middle beam assembly 6, and the rear beam assembly 7 are arranged in parallel, which is beneficial to improve the stiffness of the frame in the Y direction;

Further, the rear crossbeam assembly 7 and the rear crossbeam right section assembly 8 are connected together by welding, which is beneficial to improve the process performance.

Further, the rear beam assembly 7 and the rear beam right section assembly 8 adopt a concave design, which effectively increases the space inside the vehicle.

Further, the front and rear bodies of the left longitudinal beam assembly 1 and the left longitudinal beam rear section assembly 3, and the right longitudinal beam assembly 2 and the right longitudinal beam rear section assembly 4 adopt different material thickness designs, and the material thickness of the front body of the rear longitudinal beam is 1.8mm, the material thickness of the rear section of the rear longitudinal beam is 1.5mm; it is more beneficial to improve the collision performance, the rear part absorbs energy, and the front part is strengthened;

Further, the middle crossbeam left section assembly 9 is overlapped front and rear with the middle crossbeam assembly 6 and the rear crossbeam assembly 7, and the rear crossbeam right section assembly 8 is overlapped front and rear with the middle crossbeam assembly 6 and the rear crossbeam assembly 7, Make the middle crossbeam assembly 6 and the rear crossbeam assembly 7 form an "I"-shaped joint, which has good frame force transmission structural performance;

Implementation of the welding process method: the left longitudinal beam assembly 1, the rear section assembly 3 of the left longitudinal beam and the left section assembly 9 of the middle beam are first welded into a rear longitudinal beam assembly, which is used as the main force transmission path of the rear impact, and the rear section material Thick and thin, designed as an energy-absorbing area, the front section is thicker, designed as a reinforced protection area; front beam assembly 5, middle beam assembly 6, rear beam assembly 7, rear beam right section assembly 8, and left longitudinal beam assembly 1 and the right longitudinal beam assembly 2 are welded into a frame, as a closed mouth-shaped frame, which effectively stabilizes the frame; the left small longitudinal beam assembly 11 and the right small longitudinal beam assembly 12, and the middle cross beam assembly 6 and the rear cross beam The assembly 7 is welded into a small frame to form another small square-shaped frame, which stabilizes the structural performance of the space and forms a back-shaped structure in which the frame covers the frame, effectively improving the structural performance of the frame.

The present invention is mainly a reinforced frame structure, the performance of the frame structure is improved, the torsional rigidity and bending rigidity of the whole vehicle body are improved, and the modal is also improved.

This car body frame structure scheme can be mainly divided into four structural areas: 1. The rear part of the rear longitudinal beam and the front part are welded together separately; ; 3. The small longitudinal beam, the middle beam and the rear beam form a small Japanese-shaped frame structure, which further enhances the performance of the frame structure; 4. The middle beam is divided into three sections, and the joint with the longitudinal beam is strengthened, and the middle part is weakened;

The first structural region is shown in Figure 7 in section. The rear part of the rear longitudinal beam and the front part of the rear longitudinal beam do not need thick materials, which are used as the main force transmission path of the rear impact, and the energy absorption and force transmission structures are distinguished.

The second structural area is shown in Figure 2. The front parts of the left and right rear longitudinal beams are overlapped with the front crossbeams of the rear longitudinal beams, the middle parts of the left and right rear longitudinal beams are overlapped with the middle crossbeams, and the rear parts of the left and right rear longitudinal beams are overlapped with the rear crossbeams, and are jointly welded into a Japanese-shaped frame;

The third structural region is shown in Figure 7 section C-C. The main purpose is to increase stiffness in localized areas while helping to increase the stiffness of the frame.

The fourth structural region is shown in Figure 5 section A-A. The middle beam is divided into three sections, the left and right joints are enlarged and the left and right longitudinal beams are welded together first, so as to better transmit the force of the left and right longitudinal beams.

Above, the present invention has been exemplarily described in conjunction with the accompanying drawings. Obviously, the realization of the present invention is not limited by the above-mentioned manner, as long as various improvements of the method concept and technical solutions of the present invention are adopted, or the present invention is implemented without improvement. The ideas and technical schemes directly applied to other occasions are within the protection scope of the present invention.

Claims (9)

1. the structure of floor reinforced frame after a kind of electric car, it is characterized in that: including left stringer assembly, right vertical beam assembly, a left side Stringer back segment assembly, right vertical beam back segment assembly, front beam assembly, middle cross beam assembly, rear cross beam assembly, right section of assembly of rear cross beam, Left section of assembly of middle cross beam, right section of assembly of middle cross beam, left stringer assembly, right stringer assembly；Above structure is all character cut in bas-relief shape Trough body structure；

Left stringer assembly, one the first from left right side of right vertical beam assembly are arranged in parallel, and left stringer back segment assembly is arranged in left stringer assembly head end, right Right vertical beam back segment assembly is arranged in stringer assembly head end；

After right section of assembly of rear cross beam and rear cross beam assembly are welded to each other, it is connected laterally at left stringer back segment assembly, right vertical beam back segment The head end of assembly；

Right section of left section of assembly of middle cross beam, middle cross beam assembly, middle cross beam assembly are horizontally installed on left indulge after combining 7 welding from left to right The middle position of beam back segment assembly, right vertical beam back segment assembly；

And triangle or trapezoidal bridge joint snap-gauge (101) is arranged in right vertical beam assembly and left stringer assembly tail end, front beam assembly is lateral It rides upon to be welded to connect again on bridge joint snap-gauge and be integrated；

The rear cross beam assembly is also vertically provided with the consistent left stringer assembly of at least two-stage structure, right stringer assembly, point It does not snap into backward on right section of assembly of left section of assembly of middle cross beam and middle cross beam.

2. the structure of floor reinforced frame after a kind of electric car according to claim 1, it is characterized in that: the left stringer Assembly, right vertical beam assembly structure are consistent, are L shape or zigzag shape.

3. the structure of floor reinforced frame after a kind of electric car according to claim 1, it is characterized in that: wherein the middle cross beam Right section of left section of assembly, middle cross beam assembly section are character cut in bas-relief shape, and open front is big, and after-opening is small, and front end is bent downward prolongs further along Setting connection tongue piece (102) is stretched, connection tongue piece is welded on bridge joint snap-gauge (101) interior side-lower, and left section of assembly of middle cross beam is welded on Bridge snap-gauge (101) interior side-lower.

4. the structure of floor reinforced frame after a kind of electric car according to claim 1, it is characterized in that: the rear cross beam Right section of assembly is the curved bumper structure of 7 words, and the head end of the curved bumper structure of 7 words is welded on left stringer back segment assembly, and tail end is horizontal to extend back With rear cross beam assembly butt welding, and rear cross beam assembly account for connection after length 80%.

5. the structure of floor reinforced frame after a kind of electric car according to claim 1, it is characterized in that: the left side is small vertical Beam assembly, right stringer assembly structure are consistent, be sheet, flipped up resistance to compression side in two sides around its main body, wherein head end and Tail end diameter is small, and mid diameter is big, and the solder tail of the weldering the head and tail end of head end is respectively welded that set up middle cross beam assembly, rear cross beam total Cheng Shang, the area for snapping into the soldering tip of rear cross beam assembly is big, and the area for snapping into the solder tail of middle cross beam assembly is small；Middle cross beam assembly With the right section of assembly welding of left section of assembly of middle cross beam and middle cross beam, overlap as row's solder joint, welding hem width degree is 15mm.

6. the structure of floor reinforced frame after a kind of electric car according to claim 1 or 3, it is characterized in that: middle cross beam The right section of assembly welding of left section of assembly and middle cross beam, overlaps, welding hem width degree is with left stringer assembly, right vertical beam assembly spot welding 18mm。

7. the structure of floor reinforced frame after a kind of electric car according to claim 1 or 3, it is characterized in that: left stringer Left section of assembly of assembly and middle cross beam is first welded as T-type structure, and left section of assembly of right vertical beam assembly and middle cross beam is first welded as T junction Structure；Left section of assembly of middle cross beam is overlapped with before and after middle cross beam assembly and rear cross beam assembly, right section of assembly of rear cross beam, total with middle cross beam It is overlapped at before and after rear cross beam assembly, so that middle cross beam assembly and rear cross beam assembly is formed " I " fonts connector, there is good frame Frame force transferring structure performance.

8. the structure of floor reinforced frame after a kind of electric car according to claim 1, it is characterized in that:, front beam is total It is advantageous to improve frame Y-direction rigidity at three, middle cross beam assembly, rear cross beam assembly crossbeams parallel arrangements；Rear cross beam assembly and rear cross Right section of assembly of beam is by being welded together.

9. the structure of floor reinforced frame after a kind of electric car according to claim 8, it is characterized in that:, left stringer is total It is designed at the front and back ontology of left stringer back segment assembly and right vertical beam assembly and right vertical beam back segment assembly using different material thickness, after Longitudinal rib is set on ontology material thickness 1.8mm before stringer, left stringer assembly and left stringer back segment assembly composition left rear longitudinal beam assembly.