Thermal forming jointed board B column structure

Abstract

The invention provides a thermoforming jointed board B column structure, and belongs to the technical field of B columns, the thermoforming jointed board B column structure comprises an inner frame, a buffer assembly and a supporting assembly, the buffer assembly and the supporting assembly are arranged on the inner frame, the inner frame is close to an in-vehicle space, and an outer board is installed on one side of the inner frame. According to the invention, the arrangement of the honeycomb plate in the buffer assembly disperses stress and improves the overall bending strength through the deformation of the side wall of the honeycomb grid, and the internal cavity in the honeycomb plate is filled with air, so that the overall lightweight of the automobile is realized on the premise of ensuring that the B column has enough strength; hollow reinforcing ribs are arranged in the supporting assembly and are filled with air when the buffering assembly is compressed, the overall bearing capacity of the supporting assembly is improved, and meanwhile the light weight of the whole vehicle is further achieved through the hollow reinforcing ribs; when the buffering assembly and the supporting assembly fail, an air bag in the protection assembly expands to break the column B and expands towards the two sides, a soft buffering barrier is formed, and the situation that the head of a passenger directly collides with glass and is seriously injured is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of B-pillars, and in particular to a thermoformed panel B-pillar structure. Background Art

[0002] In the modern traffic environment, the number of vehicles on the road is increasing, and the traffic conditions are becoming more and more complicated, which increases the risk of car collision accidents. In order to protect the lives of passengers in the car, the automotive industry has put forward higher and higher requirements for the safety of the vehicle body structure, especially the side collision protection of the vehicle, which has always been a key focus in the field of automotive safety. Because the side collision often leaves relatively less buffer space for the passengers in the car, the risk of injury caused should not be underestimated. As a key supporting component of the side structure of the car body, the B-pillar undertakes the important mission of resisting the impact force and protecting the passengers in the car during a side collision.

[0003] In the prior art, the traditional B-pillar structure often adopts a single material or a relatively simple structure, which has many limitations. It is easy to be over-deformed or even broken when dealing with high-intensity side collisions, thereby increasing the risk of injury to people in the car. In order to improve the overall strength of the B-pillar, a high-strength solid reinforcement rib and multiple reinforcement plates are set in the B-pillar to improve the bearing capacity of the entire B-pillar. However, the high weight of the B-pillar will increase the weight of the whole vehicle, making it difficult to achieve a lightweight design of the vehicle, and will increase the energy consumption of the vehicle during driving. How to invent a hot-formed panel B-pillar structure to solve these problems has become an urgent problem for technicians in this field. Summary of the invention

[0004] In order to remedy the above deficiencies, the present invention provides a thermoformed panel B-pillar structure, which aims to solve the problem that traditional B-pillars cannot achieve high-strength and lightweight design at the same time.

[0005] The present invention is achieved in that: The present invention provides a thermoformed panel B-pillar structure, comprising an inner frame and a buffer assembly and a support assembly arranged on the inner frame, wherein the inner frame is close to the interior space of a vehicle, and an outer panel is installed on one side of the inner frame; The buffer assembly is installed on the inner wall of the inner frame close to the outer plate, and the buffer assembly includes a side plate, a honeycomb plate and a bottom plate; The support assembly is installed on the inner wall of the inner frame away from the outer plate, and the support assembly includes vertical hollow reinforcement ribs and transverse hollow reinforcement ribs.

[0006] Preferably, the inner wall of the side panel and the outer wall of the honeycomb panel are welded into an integral structure, the bottom end of the side panel and the outer wall of one side of the bottom panel are welded into an integral structure, and a gap is left between the bottom panel and the bottom end of the honeycomb panel.

[0007] Preferably, the shape of the support assembly is produced in accordance with the shape of the inner frame, and the outer wall of the outer panel is respectively welded and fixed to the inner frame, the side panel and the honeycomb panel.

[0008] Preferably, a plurality of the vertical hollow reinforcing ribs and the transverse hollow reinforcing ribs are arranged at equal vertical intervals, the internal spaces between the plurality of the vertical hollow reinforcing ribs and the transverse hollow reinforcing ribs are interconnected, and the end faces of the vertical hollow reinforcing ribs and the transverse hollow reinforcing ribs are sealed.

[0009] Preferably, the inner wall of the support assembly is provided with a plurality of connecting pipes fixedly connected to the inner wall of the base plate.

[0010] By adopting the above technical solution, when the side of the B-pillar is hit, the hexagonal honeycomb grid disperses the stress through the deformation of the side wall, effectively distributing the external force received in the local area to the surrounding honeycomb grid evenly, thereby preventing the B-pillar from excessive bending, improving the overall bending strength, and playing a role of buffering protection. At the same time, the internal cavity in the honeycomb panel is filled with air. On the premise of ensuring that the B-pillar has sufficient strength and energy absorption performance, the weight of the B-pillar can be significantly reduced, and the overall lightweight of the car can be achieved, thereby reducing the vehicle's fuel consumption and playing a positive role in improving the car's cruising range.

[0011] Preferably, a tearing groove is provided on the outer wall of the inner frame, and a protective component is provided in the cavity between the inner frame and the supporting component.

[0012] Preferably, the protection assembly includes a one-way valve, a piston sleeve, a piston, a striker, a gas generator and an airbag.

[0013] Preferably, the outer wall of the one-way valve is fixedly connected to the inner wall of the support assembly, one end of the one-way valve is connected to the internal space of the support assembly, and the piston sleeve is fixed to the inner wall of the one-way valve away from the support assembly by threads.

[0014] Preferably, a limiting ring is installed on the inner wall of one end of the piston sleeve close to the support assembly, the outer wall of the piston and the inner wall of the piston sleeve are piston-connected, a piston rod is installed at one end of the piston, and a firing pin is installed at one end of the piston rod.

[0015] Preferably, a mounting seat is provided on the side wall of one end of the piston sleeve away from the limiting ring, the mounting seat and the gas generator are fixedly connected, a trigger groove is provided at one end of the gas generator, and a plurality of inflation tubes fixedly connected to the inner wall of the airbag are installed at the air outlet of the gas generator, and the airbag is located in the cavity between the support assembly and the inner frame.

[0016] By adopting the above technical solution, when the B-pillar is subjected to strong external force, the air in the support assembly enters the piston sleeve and quickly pushes the piston on one side to slide, so that the striker at one end of the piston rod contacts the trigger groove. At this time, a large amount of inert gas will be quickly generated inside the gas generator, and the inert gas will diffuse into the interior of the airbag to make it expand rapidly, until it breaks through and extends out of the inner frame to further expand, so that the airbag extends to both sides, forming a soft buffer barrier between the hard objects of the vehicle body and the passengers, protecting the passengers on both sides of the B-pillar in the vehicle, preventing the passengers' heads from directly hitting the window glass and the body, reducing the impact force of the head, and avoiding the passengers' heads from directly hitting the glass and being seriously injured, thereby further protecting the passengers in the vehicle.

[0017] The beneficial effects of the present invention are: The honeycomb panel in the buffer component disperses stress through the deformation of the honeycomb cell side wall, effectively distributing the external force in the local area to the surrounding honeycomb cells, thereby preventing the B-pillar from excessive bending and improving the overall bending strength. At the same time, the internal cavity in the honeycomb panel is filled with air, and its overall density is much lower than that of solid metal reinforcement plates. Under the premise of ensuring that the B-pillar has sufficient strength and energy absorption performance, it can significantly reduce the weight of the B-pillar and achieve overall lightweighting of the car; The hollow reinforcement ribs in the support assembly are filled with air when the buffer assembly is compressed, exerting uniform outward pressure on the inner wall of the hollow reinforcement ribs, thereby providing an additional support force to the reinforcement ribs inside, further improving the overall bearing capacity of the support assembly. At the same time, the setting of the hollow reinforcement ribs further reduces the overall weight of the B-pillar, achieving lightweighting of the entire vehicle and increasing the vehicle's cruising range. The protective component is triggered when the buffer component and the support component fail. The internal airbag expands, breaks through the B-pillar and expands to both sides, forming a soft buffer barrier between the hard objects in the car body and the passengers, protecting the passengers on both sides of the B-pillar in the car, and preventing the passengers' heads from directly hitting the glass and causing serious injuries. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a schematic diagram of a thermoformed panel B-pillar structure provided by an embodiment of the present invention; Figure 2This is a disassembled diagram of a thermoformed panel B-pillar structure provided in an embodiment of the present invention; Figure 3 This is an exploded view of a thermoformed panel B-pillar structure provided by an embodiment of the present invention; Figure 4 It is a schematic diagram of a partial component of a thermoformed panel B-pillar structure provided by an embodiment of the present invention; Figure 5 It is a cross-sectional view of a local component of a thermoformed panel B-pillar structure provided by an embodiment of the present invention; Figure 6 A thermoformed panel B-pillar structure provided by an embodiment of the present invention Figure 5 A magnified view of the structure of the middle A area; Figure 7 It is a half-section view of a local component of a thermoformed panel B-pillar structure provided by an embodiment of the present invention; Figure 8 A thermoformed panel B-pillar structure provided by an embodiment of the present invention Figure 7 A magnified view of the structure of the middle B region; Fig. 9 It is a schematic diagram of a local area of ​​a thermoformed panel B-pillar structure provided by an embodiment of the present invention; Fig.10 It is a half-section view of a local area of ​​a thermoformed panel B-pillar structure provided by an embodiment of the present invention; Fig.11 A thermoformed panel B-pillar structure provided by an embodiment of the present invention Fig.10 Enlarged view of the structure of the middle C region.

[0020] In the figure: 1. inner frame; 11. tear groove; 2. outer panel; 3. buffer assembly; 31. side panel; 32. honeycomb panel; 33. bottom plate; 34. connecting pipe; 4. support assembly; 41. vertical hollow reinforcement rib; 42. horizontal hollow reinforcement rib; 5. protection assembly; 51. one-way valve; 52. piston sleeve; 521. limit ring; 522. mounting seat; 53. piston; 531. piston rod; 54. firing pin; 55. gas generator; 551. trigger groove; 56. inflation tube; 57. airbag. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] Example, see Figure 1-Figure 3 A thermoformed panel B-pillar structure includes an inner frame 1 and a buffer component 3 and a support component 4 arranged on the inner frame 1. The inner frame 1 is close to the interior space of the vehicle, and an outer panel 2 is installed on one side of the inner frame 1; The buffer assembly 3 is installed on the inner wall of the inner frame 1 close to the outer plate 2, and the buffer assembly 3 includes a side plate 31, a honeycomb plate 32 and a bottom plate 33; The support assembly 4 is installed on the inner wall of the inner frame 1 away from the outer plate 2 , and the support assembly 4 includes vertical hollow reinforcement ribs 41 and transverse hollow reinforcement ribs 42 .

[0023] Furthermore, the inner wall of the side panel 31 and the outer wall of the honeycomb panel 32 are welded into an integral structure, the bottom end of the side panel 31 and the outer wall of one side of the bottom panel 33 are welded into an integral structure, a gap is left between the bottom panel 33 and the bottom end of the honeycomb panel 32, the shape of the support assembly 4 is adapted and produced according to the shape of the inner frame 1, the outer wall of the outer panel 2 is welded and fixed to the inner frame 1, the side panel 31 and the honeycomb panel 32 respectively, a plurality of vertical hollow reinforcing ribs 41 and transverse hollow reinforcing ribs 42 are arranged vertically and equidistantly, the internal spaces between the plurality of vertical hollow reinforcing ribs 41 and the transverse hollow reinforcing ribs 42 are interconnected, the end faces of the vertical hollow reinforcing ribs 41 and the transverse hollow reinforcing ribs 42 are sealed, and the inner wall of the support assembly 4 is provided with a plurality of connecting pipes 34 fixedly connected to the inner wall of the bottom panel 33.

[0024] It should be noted that: the arrangement of the honeycomb panel 32 in the buffer component 3 disperses the stress through the deformation of the side wall when the side of the B-pillar is hit, effectively distributing the external force received in the local area to the surrounding honeycomb grids, thereby preventing the B-pillar from excessive bending and improving the overall bending strength. At the same time, when the external force from above is received, the buffering effect of the gas inside the honeycomb grid is utilized to evenly disperse the external pressure to the entire honeycomb panel 32, thereby improving the compressive strength of the B-pillar under vertical pressure. In this way, when the B-pillar is hit, the honeycomb panel 32 inside the B-pillar can first absorb part of the impact force, reduce the energy transmitted to the car, reduce the degree of injury to the occupants, and play a role in buffering protection. At the same time, the internal cavity in the honeycomb panel 32 is filled with air, and its overall density is much lower than that of a solid metal reinforcement plate and other structures. On the premise of ensuring that the B-pillar has sufficient strength and energy absorption performance, the weight of the B-pillar can be significantly reduced, and the overall lightweight of the car can be achieved, thereby reducing the fuel consumption of the vehicle and having a positive effect on improving the cruising range of the car. When the B-pillar is hit, the support component 4 close to the outer panel 2 is first exposed to external force. At this time, the honeycomb panel 32 in the buffer component 3 is compressed and deformed during the buffering process. The air in the honeycomb grid is compressed and filled into the support component 4 on one side through the connecting pipe 34, so that the inside of the hollow reinforcement rib is filled with air, thereby increasing the pressure inside the support component 4. The filled air exerts a uniform outward pressure on the inner wall of the hollow reinforcement rib, thereby providing an additional supporting force for the reinforcement rib inside. Compared with the solid reinforcement rib, the external force can be evenly distributed to various positions of the reinforcement rib, avoiding stress concentration and bending at local positions, so that the hollow reinforcement rib as a whole can withstand greater external force, effectively improving its bearing capacity, preventing excessive deformation or damage due to excessive external force, and improving the strength of the entire B-pillar. At the same time, the setting of the hollow reinforcement rib further reduces the overall weight of the B-pillar, realizes the lightweight of the entire vehicle and improves the vehicle's cruising range.

[0025] Furthermore, a tearing groove 11 is provided on the outer wall of the inner frame 1, and a protective assembly 5 is provided in the cavity between the inner frame 1 and the support assembly 4. The protective assembly 5 includes a one-way valve 51, a piston sleeve 52, a piston 53, a striker 54, a gas generator 55 and an airbag 57. The outer wall of the one-way valve 51 is fixedly connected to the inner wall of the support assembly 4, one end of the one-way valve 51 is connected to the internal space of the support assembly 4, the piston sleeve 52 is fixed to the inner wall of the one-way valve 51 away from the support assembly 4 by a thread, and a limit ring 5 is installed on the inner side wall of one end of the piston sleeve 52 close to the support assembly 4 21. The outer wall of the piston 53 and the inner wall of the piston sleeve 52 are connected by a piston. A piston rod 531 is installed at one end of the piston 53, and a firing pin 54 is installed at one end of the piston rod 531. A mounting seat 522 is provided on the side wall of the piston sleeve 52 at one end away from the limiting ring 521. The mounting seat 522 and the gas generator 55 are fixedly connected. A trigger groove 551 is provided at one end of the gas generator 55. A plurality of inflation tubes 56 fixedly connected to the inner wall of the airbag 57 are installed at the air outlet of the gas generator 55. The airbag 57 is located in the cavity between the support assembly 4 and the inner frame 1.

[0026] It should be noted that: when the B-pillar is subjected to a strong external force, the buffer component 3 is deformed and the interior of the support component 4 is filled with high-pressure gas. When the pressure inside the support component 4 is higher than the set value, the one-way valve 51 is pushed open to release the air, thereby reducing the pressure inside the support component 4, preventing the air inside the hollow reinforcing rib from expanding rapidly and releasing energy when it is hit, and generating a pressure exceeding the material itself on the inner wall of the hollow reinforcing rib, causing the reinforcing rib to rupture and produce an explosion-like effect, thereby protecting the people in the car, preventing the passengers from being injured by the flying fragments generated by the broken B-pillar, and reducing the scope of harm caused by the accident; After the one-way valve 51 is pushed open, the air in the support assembly 4 enters the piston sleeve 52, and quickly pushes the piston 53 on one side to slide, so that it approaches the gas generator 55 at one end at a very fast speed, until the striker 54 at one end of the piston rod 531 contacts the trigger groove 551. At this time, a large amount of inert gas will be rapidly generated inside the gas generator 55, and the inert gas will diffuse into the interior of the airbag 57 to make it expand rapidly, so that one side of the airbag 57 is against the outer wall of the inner frame 1 close to the inner side of the tear groove 11, until it is pushed through and extends out of the inner frame 1 to further expand, so that the airbag 57 extends to both sides, forming a soft buffer barrier between the hard objects of the vehicle body and the passengers, protecting the passengers near both sides of the B-pillar in the vehicle, preventing the passengers' heads from directly hitting the window glass and the body, reducing the impact force of the head, and avoiding the passengers' heads from directly hitting the glass and being seriously injured, thereby further protecting the passengers in the vehicle.

[0027] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A thermoformed panel B-pillar structure, comprising an inner frame (1) and a buffer component (3) and a support component (4) arranged on the inner frame (1), characterized in that: The inner frame (1) is close to the interior space of the vehicle, and an outer panel (2) is installed on one side of the inner frame (1); The buffer component (3) is installed on the inner wall of the inner frame (1) close to the outer panel (2), and the buffer component (3) comprises a side panel (31), a honeycomb panel (32) and a bottom panel (33); The support assembly (4) is mounted on an inner wall of the inner frame (1) away from the outer plate (2), and the support assembly (4) comprises vertical hollow reinforcing ribs (41) and transverse hollow reinforcing ribs (42).

2. A thermoformed panel B-pillar structure according to claim 1, characterized in that: The inner wall of the side panel (31) and the outer wall of the honeycomb panel (32) are welded into an integrated structure, the bottom end of the side panel (31) and the outer wall of one side of the bottom panel (33) are welded into an integrated structure, and a gap is left between the bottom panel (33) and the bottom end of the honeycomb panel (32).

3. A thermoformed panel B-pillar structure according to claim 2, characterized in that: The shape of the support assembly (4) is produced in accordance with the shape of the inner frame (1), and the outer wall of the outer panel (2) is respectively welded and fixed to the inner frame (1), the side panel (31) and the honeycomb panel (32).

4. The thermoformed panel B-pillar structure according to claim 3, characterized in that: A plurality of the vertical hollow reinforcing ribs (41) and the transverse hollow reinforcing ribs (42) are arranged at equal vertical intervals, the internal spaces between the plurality of the vertical hollow reinforcing ribs (41) and the transverse hollow reinforcing ribs (42) are interconnected, and the end faces of the vertical hollow reinforcing ribs (41) and the transverse hollow reinforcing ribs (42) are sealed.

5. The thermoformed panel B-pillar structure according to claim 4, characterized in that: The inner wall of the support assembly (4) is provided with a plurality of connecting pipes (34) fixedly connected to the inner wall of the bottom plate (33).

6. The thermoformed panel B-pillar structure according to claim 1, characterized in that: The outer wall of the inner frame (1) is provided with a tearing groove (11), and the cavity between the inner frame (1) and the supporting component (4) is provided with a protective component (5).

7. The thermoformed panel B-pillar structure according to claim 6, characterized in that: The protection component (5) comprises a one-way valve (51), a piston sleeve (52), a piston (53), a striker (54), a gas generator (55) and an air bag (57).

8. The thermoformed panel B-pillar structure according to claim 7, characterized in that: The outer wall of the one-way valve (51) is fixedly connected to the inner wall of the support assembly (4), one end of the one-way valve (51) is in communication with the internal space of the support assembly (4), and the piston sleeve (52) is fixed to the inner wall of the one-way valve (51) away from the support assembly (4) via threads.

9. The thermoformed panel B-pillar structure according to claim 8, characterized in that: A limiting ring (521) is installed on the inner side wall of one end of the piston sleeve (52) close to the support assembly (4); the outer wall of the piston (53) and the inner wall of the piston sleeve (52) are piston-connected; a piston rod (531) is installed on one end of the piston (53); and a striker (54) is installed on one end of the piston rod (531).

10. The thermoformed panel B-pillar structure according to claim 9, characterized in that: A mounting seat (522) is provided on a side wall of one end of the piston sleeve (52) away from the limiting ring (521); the mounting seat (522) is fixedly connected to the gas generator (55); a trigger groove (551) is provided at one end of the gas generator (55); a plurality of inflation tubes (56) fixedly connected to the inner wall of the airbag (57) are installed at the air outlet of the gas generator (55); and the airbag (57) is located in a cavity between the support assembly (4) and the inner frame (1).

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