Torsion box structure, vehicle body torsion beam and electric vehicle

Abstract

The application provides a torsion box structure, a vehicle body torsion beam and an electric vehicle, and belongs to the field of automobiles. The application solves the problem of poor energy absorption effect of the torsion beam in the prior art after a front collision and a side collision. The torsion box structure comprises three cavity structures, a torsion box front reinforcing plate, a front longitudinal beam lower reinforcing plate, a torsion box, a torsion box rear reinforcing plate, a rocker inner panel, a front wall baffle lower plate and a front longitudinal beam outer plate to form a first cavity, a front longitudinal beam inner plate, a front longitudinal beam rear plate, a front longitudinal beam rear reinforcing plate, the torsion box, the torsion box rear reinforcing plate, the front longitudinal beam lower reinforcing plate, the front longitudinal beam rear reinforcing plate, the rocker inner panel, a front wall middle lower plate and the front wall baffle lower plate to form a second cavity, and the front longitudinal beam rear reinforcing plate, the front longitudinal beam rear plate, the torsion box, the torsion box rear reinforcing plate and the front wall baffle lower plate to form a third cavity. The torsion box structure is mainly used for electric vehicles.

Description

Technical Field

[0001] This invention belongs to the automotive field, and in particular relates to a torsion box structure, a torsion beam for a car body, and an electric vehicle. Background Technology

[0002] Electric vehicles have been developing rapidly in recent years. Compared with traditional fuel vehicles, electric vehicles require the power battery to be placed under the floor. The front engine compartment has become the main load-bearing structure of the vehicle body. The front longitudinal beam and torsion box are very important links in the force transmission process. The traditional front longitudinal beam and torsion box structure generally have the disadvantages of low strength and poor force transmission and absorption. In the existing technology, one end of the torsion box assembly is usually connected to the door sill, and the other end is connected to the rear outer plate of the front longitudinal beam and the rear mounting plate assembly of the front subframe, forming a cavity to absorb the energy transmitted by the collision. Due to the lack of a torsion box reinforcement plate and the unsatisfactory position of the crossbeam, the overall stability and energy absorption effect of the front longitudinal beam and torsion box are not ideal. The lack of connection between the two torsion boxes on the left and right sides of the vehicle body is not conducive to force transmission. Summary of the Invention

[0003] In view of this, the present invention aims to propose a torsion box structure, a torsion beam for a vehicle body, and an electric vehicle, so as to solve the problem that the torsion beam in the prior art cannot simultaneously absorb the energy generated after a frontal collision and a side collision.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A torsion box structure includes a torsion box, a rear reinforcing plate of the torsion box, an inner plate of the front longitudinal beam, an outer plate of the front longitudinal beam, a front reinforcing plate of the torsion box, a lower reinforcing plate of the front longitudinal beam, a rear reinforcing plate of the front longitudinal beam, a rear plate of the front longitudinal beam, an inner sill plate, a lower plate of the middle section of the front bulkhead, and a lower plate of the front bulkhead baffle. The front reinforcing plate of the torsion box, the lower reinforcing plate of the front longitudinal beam, the torsion box, the rear reinforcing plate of the torsion box, the inner sill plate, the lower plate of the front bulkhead baffle, and the outer plate of the front longitudinal beam form a first cavity. The inner plate of the front longitudinal beam, the rear plate of the front longitudinal beam, the rear reinforcing plate of the front longitudinal beam, the torsion box, the rear reinforcing plate of the torsion box, the lower reinforcing plate of the front longitudinal beam, the rear reinforcing plate of the front longitudinal beam, the inner sill plate, the lower plate of the middle section of the front bulkhead, and the lower plate of the front bulkhead baffle form a second cavity. The rear reinforcing plate of the front longitudinal beam, the rear plate of the front longitudinal beam, the torsion box, the rear reinforcing plate of the torsion box, and the lower plate of the front bulkhead baffle form a third cavity.

[0006] Furthermore, the outer plate of the front longitudinal beam in the first cavity is connected to the front reinforcing plate of the torsion box, and the lower reinforcing plate of the front longitudinal beam, the torsion box, the rear reinforcing plate of the torsion box, and the inner sill plate in the first cavity are all connected to the outer plate of the front longitudinal beam and the front reinforcing plate of the torsion box.

[0007] Furthermore, the inner plate of the front longitudinal beam and the rear plate of the front longitudinal beam are connected in the second cavity. The rear reinforcing plate of the front longitudinal beam, the torsion box, and the rear reinforcing plate of the torsion box in the second cavity are all connected to the inner plate of the front longitudinal beam and the rear plate of the front longitudinal beam. The lower plate of the front bulkhead is connected to the lower reinforcing plate of the front longitudinal beam and the rear reinforcing plate of the front longitudinal beam by MIG welding. The lower plate of the front bulkhead is connected to the inner plate of the sill and the lower plate of the middle part of the front bulkhead by spot welding.

[0008] Furthermore, the rear plate of the front longitudinal beam in the third cavity is connected to the rear reinforcing plate of the front longitudinal beam, the torsion box, the rear reinforcing plate of the torsion box, and the lower plate of the front bulkhead.

[0009] Furthermore, a vehicle body torsion beam includes two torsion box structures.

[0010] Furthermore, it also includes a front longitudinal beam reinforcement beam, with two torsion box structures symmetrically installed on both sides of the front longitudinal beam reinforcement beam, and front longitudinal beam inner plates symmetrically installed on both sides of the front longitudinal beam reinforcement beam.

[0011] Furthermore, the front longitudinal beam reinforcing beam is connected to the front bulkhead crossbeam, and a cavity is provided between the front longitudinal beam reinforcing beam and the front bulkhead crossbeam.

[0012] Furthermore, the lower plates of the front bulkheads in the two torsion box structures are connected by a central channel and a central channel reinforcing beam.

[0013] Furthermore, an electric vehicle includes the aforementioned body torsion beam.

[0014] Furthermore, the torsion box structure on the vehicle body torsion beam is equipped with a torsion box reinforcing crossbeam.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1. The present invention adds a front longitudinal beam lower reinforcing plate, a front longitudinal beam rear reinforcing plate, and a torsion box front reinforcing plate inside the torsion box. Then, the front longitudinal beam rear plate, the torsion box, the torsion box rear reinforcing plate, the sill inner plate, and the front fender lower plate form three cavity structures, which can greatly improve the absorption of energy generated after frontal and side collisions.

[0017] 2. The central channel reinforcing beam of the present invention connects the left and right torsion box structures of the vehicle body to form a whole, thereby greatly improving the stability of the front end and helping to transmit force in the event of a frontal or side collision.

[0018] 3. The torsion box structure can be adapted to different electric vehicle models by adjusting the torsion box reinforcing beam.

[0019] 4. The torsion box structure has high overall structural rigidity and strength, which can effectively improve collision safety. By adding a reinforcing crossbeam to the torsion box, the battery placement can be adjusted according to the different vehicle models. Attached Figure Description

[0020] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0021] Figure 1 This is a schematic diagram of the structure of a vehicle body torsion beam according to the present invention. Figure 1 ;

[0022] Figure 2 This is an exploded schematic diagram of a vehicle body torsion beam according to the present invention;

[0023] Figure 3 This is a bottom view of a vehicle body torsion beam according to the present invention;

[0024] Figure 4 This is a top view of a vehicle body torsion beam according to the present invention;

[0025] Figure 5 This is a schematic diagram of the structure of the torque box described in this invention;

[0026] Figure 6 This is a side view of the torsion box structure described in this invention;

[0027] Figure 7 This is a schematic diagram of the structure of a vehicle body torsion beam according to the present invention. Figure 2 .

[0028] 1-Inner plate of front longitudinal beam, 2-Outer plate of front longitudinal beam, 3-Front reinforcing plate of torsion box, 4-Lower reinforcing plate of front longitudinal beam, 5-Rear reinforcing plate of front longitudinal beam, 6-Rear plate of front longitudinal beam, 7-Torsion box, 8-Rear reinforcing plate of torsion box, 9-Inner plate of sill, 10-Lower plate of front bulkhead, 11-Crossbeam of front bulkhead, 12-Reinforcing beam of central passage, 13-Lower plate of central front bulkhead, 14-Cross passage, 15-Reinforcing beam of front longitudinal beam, 16-First cavity, 17-Second cavity, 18-Third cavity, 19-Reinforcing beam of torsion box. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of the present invention can be combined with each other, and the described embodiments are only some embodiments of the present invention, not all embodiments.

[0030] Specific implementation method one: See Figure 1-7 This embodiment describes a torsion box structure, including a torsion box 7, a rear reinforcing plate 8, an inner front longitudinal beam plate 1, an outer front longitudinal beam plate 2, a front reinforcing plate 3, a lower front longitudinal beam reinforcing plate 4, a rear front longitudinal beam reinforcing plate 5, a rear front longitudinal beam plate 6, an inner sill plate 9, a lower front bulkhead plate 13, and a lower front bulkhead baffle plate 10. The torsion box front reinforcing plate 3, the lower front longitudinal beam reinforcing plate 4, the torsion box 7, the rear torsion box reinforcing plate 8, the inner sill plate 9, and the front bulkhead... The lower baffle plate 10 and the outer plate 2 of the front longitudinal beam form a first cavity 16. The inner plate 1 of the front longitudinal beam, the rear plate 6 of the front longitudinal beam, the rear reinforcing plate 5 of the front longitudinal beam, the torsion box 7, the rear reinforcing plate 8 of the torsion box, the lower reinforcing plate 4 of the front longitudinal beam, the rear reinforcing plate 5 of the front longitudinal beam, the inner sill plate 9, the lower plate 13 of the front bulkhead, and the lower baffle plate 10 of the front bulkhead form a second cavity 17. The rear reinforcing plate 5 of the front longitudinal beam, the rear plate 6 of the front longitudinal beam, the torsion box 7, and the rear reinforcing plate 8 of the torsion box form a second cavity 17 with the front bulkhead. The lower baffle plate 10 forms a third cavity 18. The outer plate 2 of the front longitudinal beam in the first cavity 16 is connected to the front reinforcing plate 3 of the torsion box. The lower reinforcing plate 4 of the front longitudinal beam, the torsion box 7, the rear reinforcing plate 8 of the torsion box, and the inner sill plate 9 in the first cavity 16 are all connected to the outer plate 2 of the front longitudinal beam and the front reinforcing plate 3 of the torsion box. The inner plate 1 of the front longitudinal beam in the second cavity 17 is connected to the rear plate 6 of the front longitudinal beam. The rear reinforcing plate 5 of the front longitudinal beam in the second cavity 17... Torque box 7 and torsion box rear reinforcing plate 8 are both connected to front longitudinal beam inner plate 1 and front longitudinal beam rear plate 6. Front bulkhead lower plate 10 is connected to front longitudinal beam lower reinforcing plate 4 and front longitudinal beam rear reinforcing plate 5 by MIG welding. Front bulkhead lower plate 10 is connected to sill inner plate 9 and front bulkhead middle lower plate 13 by spot welding. Front longitudinal beam rear plate 6 in the third cavity 18 is connected to front longitudinal beam rear reinforcing plate 5, torsion box 7, torsion box rear reinforcing plate 8 and front bulkhead lower plate 10.

[0031] The device forms a first cavity 16 with the front reinforcing plate 3 of the torsion box, the lower reinforcing plate 4 of the front longitudinal beam, the torsion box 7, the rear reinforcing plate 8 of the torsion box, the inner sill plate 9, the lower plate 10 of the front bulkhead, and the outer plate 2 of the front longitudinal beam. The inner plate 1 of the front longitudinal beam forms a second cavity 17 with the rear plate 6 of the front longitudinal beam, the rear reinforcing plate 5 of the front longitudinal beam, the torsion box 7, the rear reinforcing plate 8 of the torsion box, the lower reinforcing plate 4 of the front longitudinal beam, the rear reinforcing plate 5 of the front longitudinal beam, the inner sill plate 9, the lower plate 13 of the middle of the front bulkhead, and the lower plate 10 of the front bulkhead. The rear reinforcing plate 5 of the front longitudinal beam, the rear plate 6 of the front longitudinal beam, the torsion box 7, the rear reinforcing plate 8 of the torsion box, and the lower plate 10 of the front bulkhead. By providing a three-cavity structure, the absorption of energy generated after frontal and side collisions can be greatly improved.

[0032] Specific Embodiment Two: A vehicle body torsion beam includes two torsion box structures as described in any one of claims 1-4, and a front longitudinal beam reinforcing beam 15. The two torsion box structures are symmetrically installed on both sides of the front longitudinal beam reinforcing beam 15. Front longitudinal beam inner plates 1 are symmetrically installed on both sides of the front longitudinal beam reinforcing beam 15. The front longitudinal beam reinforcing beam 15 is connected to the front bulkhead crossbeam 11. A cavity is provided between the front longitudinal beam reinforcing beam 15 and the front bulkhead crossbeam 11. The front bulkhead lower plate 10 in the two torsion box structures is connected through a central channel 14 and a central channel reinforcing beam 12.

[0033] The front longitudinal beam reinforcing beam 15 is spot-welded to the front longitudinal beam inner plate 1. The right-side structure is symmetrical to the left-side structure, effectively connecting the left and right longitudinal beams of the vehicle body, which is beneficial for transmitting the forces generated by frontal and side collisions. The front bulkhead baffle crossbeam 11 is spot-welded to the front longitudinal beam reinforcing beam 15, the torsion box front reinforcing plate 3, the sill inner plate 9, and the front bulkhead lower plate 10. The cavity structure formed by the front longitudinal beam reinforcing beam 15 and the front bulkhead baffle crossbeam 11 is also beneficial for energy absorption. The central channel 14 is spot-welded to the front bulkhead lower plate 10, the front bulkhead crossbeam 11, and the front bulkhead middle lower plate 1. The cavity structure formed by the connection of the central channel 14 and the lower central plate 13 of the front bulkhead greatly improves the vehicle's frontal collision stability and can absorb more energy generated during a collision. The central channel reinforcing beam 12 is connected to the lower central plate 10 of the front bulkhead, the central channel reinforcing beam 12, and the lower central plate 13 of the front bulkhead by spot welding, connecting the two independent torsion boxes on the left and right sides with the central channel. In this way, the overall structure will be more stable in the event of a frontal or side collision, absorb more energy generated during a collision, and the force transmission path will be smoother, greatly improving the stability of the front end of the vehicle body.

[0034] Specific implementation method three: An electric vehicle, the electric vehicle including the body torsion beam of claim 6, wherein a torsion box reinforcing crossbeam 19 is installed on the torsion box structure of the body torsion beam.

[0035] For vehicles with different wheelbases, the torque box structure has high overall rigidity and strength, which can effectively improve collision safety. Only by adding the torque box reinforcing beam 19 can the corresponding adjustments be made according to the arrangement of the power battery in different vehicle models.

[0036] The embodiments of the present invention disclosed above are merely illustrative of the invention. These embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention.

Claims

1. A torsion box structure, characterized in that: The components include a torsion box (7), a rear reinforcing plate (8) of the torsion box, an inner plate (1) of the front longitudinal beam, an outer plate (2) of the front longitudinal beam, a front reinforcing plate (3) of the torsion box, a lower reinforcing plate (4) of the front longitudinal beam, a rear reinforcing plate (5) of the front longitudinal beam, a rear plate (6) of the front longitudinal beam, an inner sill plate (9), a lower plate (13) of the front bulkhead, and a lower plate (10) of the front bulkhead baffle. The front reinforcing plate (3) of the torsion box, the lower reinforcing plate (4) of the front longitudinal beam, the torsion box (7), the rear reinforcing plate (8) of the torsion box, the inner sill plate (9), and the lower plate (10) of the front bulkhead baffle are connected to the outer plate of the front longitudinal beam. The plate (2) forms a first cavity (16), and the inner plate (1) of the front longitudinal beam, together with the rear plate (6) of the front longitudinal beam, the rear reinforcing plate (5) of the front longitudinal beam, the torsion box (7), the rear reinforcing plate (8) of the torsion box, the lower reinforcing plate (4) of the front longitudinal beam, the rear reinforcing plate (5) of the front longitudinal beam, the inner plate (9) of the sill, the lower plate (13) of the front bulkhead, and the lower plate (10) of the front bulkhead baffle form a second cavity (17), and the rear reinforcing plate (5) of the front longitudinal beam, the rear plate (6) of the front longitudinal beam, the torsion box (7) and the rear reinforcing plate (8) of the torsion box, together with the lower plate (10) of the front bulkhead baffle, form a second cavity (17). The first cavity (16) forms a third cavity (18). The outer plate (2) of the front longitudinal beam in the first cavity (16) is connected to the front reinforcing plate (3) of the torsion box. The lower reinforcing plate (4), torsion box (7), rear reinforcing plate (8) of the torsion box and the inner plate (9) of the sill in the first cavity (16) are all connected to the outer plate (2) of the front longitudinal beam and the front reinforcing plate (3) of the torsion box. The inner plate (1) of the front longitudinal beam in the second cavity (17) is connected to the rear plate (6) of the front longitudinal beam. The rear reinforcing plate (5) of the front longitudinal beam and the torsion box in the second cavity (17) are connected to the inner plate (1) of the front longitudinal beam and the rear plate (6) of the front longitudinal beam. The box (7) and the rear reinforcing plate (8) of the torsion box are connected to the inner plate (1) of the front longitudinal beam and the rear plate (6) of the front longitudinal beam. The lower plate (10) of the front bulkhead is connected to the lower reinforcing plate (4) of the front longitudinal beam and the rear reinforcing plate (5) of the front longitudinal beam by MIG welding. The lower plate (10) of the front bulkhead is connected to the inner plate (9) of the sill and the lower plate (13) of the middle part of the front bulkhead by spot welding. The rear plate (6) of the front longitudinal beam in the third cavity (18) is connected to the rear reinforcing plate (5) of the front longitudinal beam, the torsion box (7), the rear reinforcing plate (8) of the torsion box and the lower plate (10) of the front bulkhead.

2. A torsion beam for a vehicle body, characterized in that: It includes two torsion box structures as described in any one of claims 1.

3. A vehicle body torsion beam according to claim 2, characterized in that: It also includes a front longitudinal beam reinforcing beam (15), two torsion box structures are symmetrically installed on both sides of the front longitudinal beam reinforcing beam (15), and front longitudinal beam inner plates (1) are symmetrically installed on both sides of the front longitudinal beam reinforcing beam (15).

4. A vehicle body torsion beam according to claim 3, characterized in that: The front longitudinal beam reinforcing beam (15) is connected to the front baffle crossbeam (11), and a cavity is provided between the front longitudinal beam reinforcing beam (15) and the front baffle crossbeam (11).

5. A vehicle body torsion beam according to claim 3, characterized in that: The front bulkhead lower plate (10) in the two torsion box structures is connected by a central channel (14) and a central channel reinforcing beam (12).

6. An electric vehicle, characterized in that: The electric vehicle includes the body torsion beam as described in claim 3.

7. An electric vehicle according to claim 6, characterized in that: The torsion box structure of the torsion beam of the vehicle body is equipped with a torsion box reinforcing crossbeam (19).

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