CN213594372U

CN213594372U - B-pillar reinforcing structure

Info

Publication number: CN213594372U
Application number: CN202021700188.8U
Authority: CN
Inventors: 付军鹏
Original assignee: IAT Automobile Technology Co Ltd
Current assignee: IAT Automobile Technology Co Ltd
Priority date: 2020-08-15
Filing date: 2020-08-15
Publication date: 2021-07-02
Anticipated expiration: 2030-08-15

Abstract

The utility model relates to a B post additional strengthening belongs to the technical field of automobile design and manufacturing. The utility model discloses a B-pillar reinforcing structure, which comprises an upper hinge reinforcing plate, a B-pillar reinforcing plate and a B-pillar inner plate, wherein the upper hinge reinforcing plate is welded at the inner side of the B-pillar reinforcing plate; the end parts of the B-column inner plate and the B-column reinforcing plate are welded and fixed, the B-column inner plate comprises a B-column inner plate body, and two sides of the B-column inner plate body are provided with inner concave parts; the upper hinge reinforcing plate comprises an upper base plate, a sinking platform structure is arranged on the upper base plate, protruding parts are arranged on two sides of the sinking platform structure, and upper side plates are arranged on two sides of the protruding parts; the upper side plate extends in the direction of the B-pillar inner plate to abut against the inner concave portion of the B-pillar inner plate, and the gap between the end of the upper side plate and the bottom end of the inner concave portion is about 2 mm. The utility model discloses a B post additional strengthening goes up the boundary of hinge reinforcing plate and supports together with B post inner panel when taking place the side and bumping, can improve the stability of B post position, improves the side and bumps the performance.

Description

B-pillar reinforcing structure

Technical Field

The utility model relates to a technical field of automobile design and manufacturing, more specifically say, the utility model relates to a B post additional strengthening.

Background

In the prior art, a frame type vehicle body framework is usually adopted to construct a structural ring type cage type vehicle body, so that the rigidity and the safety performance of the vehicle body are ensured. The lower vehicle body framework is optimized in topology, so that collision energy from the front or the side of a vehicle body can be effectively absorbed by the vehicle body framework through a reasonable transmission path, the front collision energy is absorbed by structures such as a cabin sending ring, a side beam ring and an A column ring, and the side collision energy is absorbed by structures such as a B column ring, a doorsill and a seat cross beam. Fig. 1-3 show a prior art B-pillar reinforcement structure, in which the flange length of the upper hinge reinforcement plate 1 extends to the round tangent line C of the B-pillar reinforcement plate 2, and the side surface is connected with the B-pillar reinforcement plate 2 by spot welding. The B-column reinforcing plate 2 and the B-column inner plate 3 are welded to form a B-column cavity to cope with side collision, and the effect of protecting passengers is achieved.

The area above the hinge on the B column corresponds to the chest and the head of a human body, if the B column is collided, the part of the B column is invalid, bent and invaded into the space of the cockpit, and the human body can be fatally injured, so that the strength of the area above the hinge on the B column needs to be improved, the invasion amount is reduced, and the injury to the human body is reduced. At present, people have higher and higher requirements on automobile safety, and in order to improve the side impact safety, the problem that needs to be solved currently is how to improve the side impact safety under the condition that the external size of the existing B column is not increased.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem in the prior art, the utility model aims to provide a B post additional strengthening.

The utility model discloses a B-pillar reinforcing structure, which comprises an upper hinge reinforcing plate, a B-pillar reinforcing plate and a B-pillar inner plate, wherein the upper hinge reinforcing plate is welded at the inner side of the B-pillar reinforcing plate; the B column inner plate is welded and fixed with the end part of the B column reinforcing plate, the B column inner plate comprises a B column inner plate body, and two sides of the B column inner plate body are provided with inner concave parts; the upper hinge reinforcing plate comprises an upper base plate, a sinking platform structure extending along the height direction is arranged on the upper base plate, protruding parts are arranged on two sides of the sinking platform structure, and upper side plates are arranged on two sides of the protruding parts; the upper side plate extends towards the B-pillar inner plate and is abutted to the inner concave portion of the B-pillar inner plate, and a gap between the end portion of the upper side plate and the bottom end of the inner concave portion is about 2 mm.

The upper hinge reinforcing plate further comprises a lower bottom plate, and lower side plates are arranged on two sides of the lower bottom plate.

The B-column reinforcing plate comprises a lower bottom wall and an upper bottom wall, wherein lower side walls are arranged on two sides of the lower bottom wall, sunken walls extending along the height direction are arranged on the upper bottom wall, convex walls are arranged on two sides of each sunken wall, and upper side walls are arranged on two sides of each convex wall; the lower bottom plate and the sinking platform structure of the upper hinge reinforcing plate are respectively welded and fixed with the lower bottom wall and the sinking wall of the B-pillar reinforcing plate, and the upper side plate and the lower side plate of the upper hinge reinforcing plate are respectively welded and fixed with the upper side wall and the lower side wall of the B-pillar reinforcing plate.

Wherein a gap is formed between the protrusion of the upper hinge reinforcing plate and the convex wall of the B-pillar reinforcing plate.

The end part of the inner concave part of the B-column inner plate is provided with an inner flanging, the end part of the upper side wall is provided with an outer flanging, and the B-column reinforcing plate and the B-column inner plate are welded and fixed through the outer flanging and the inner flanging.

And transverse reinforcing ribs are arranged on the upper side plate and the lower side plate.

Wherein, sink the structural a plurality of mounting holes that are provided with of platform.

Compared with the prior art, the utility model discloses a B post additional strengthening has following beneficial effect:

the B-column reinforcing structure of the utility model reduces the maximum bending stress outside the B-column reinforcing plate and improves the strength of the area; the boundary of the upper hinge reinforcing plate is supported with the B column inner plate together when side collision occurs, so that the stability of the position of the B column can be improved, bending is avoided when side collision occurs, the invasion amount is reduced, and harm to a human body can be avoided or reduced.

Drawings

FIG. 1 is a schematic view of a side wall assembly B pillar in the prior art.

Fig. 2 is a schematic structural diagram of a B-pillar upper hinge reinforcing plate in the prior art.

Fig. 3 is a schematic sectional view taken along a-a of fig. 1.

Fig. 4 is a schematic structural view of the B-pillar hinge reinforcing plate of the present invention.

Fig. 5 is a schematic structural view of the B-pillar hinge reinforcing plate of the present invention.

Fig. 6 is a schematic cross-sectional view taken along the direction B-B in fig. 4.

Detailed Description

The present invention will be further described with reference to specific embodiments to help those skilled in the art to understand the technical solution of the present invention more completely, accurately and deeply.

Example 1

As shown in fig. 4 to 6, the B-pillar reinforcement structure of the present embodiment includes an upper hinge reinforcement plate 10, a B-pillar reinforcement plate 20, and a B-pillar inner panel 30, the upper hinge reinforcement plate 10 being located inside the B-pillar reinforcement plate. As shown in fig. 5, the upper hinge reinforcing plate 10 includes a lower plate 14 and an upper plate 18, lower side plates 15 are disposed on two sides of the lower plate 14, a platform sinking structure 11 extending along a height direction is disposed on the upper plate 18, protruding portions 13 are disposed on two sides of the platform sinking structure 11, upper side plates 12 are disposed on two sides of the protruding portions 13, transverse reinforcing ribs 17 are disposed on the upper side plates 12 and the lower side plates 15, and a plurality of mounting holes 16 are disposed on the platform sinking structure 11. The B-pillar reinforcing plate 20 includes a lower bottom wall and an upper bottom wall, wherein a lower side wall (not shown) is provided on both sides of the lower bottom wall, a sunken wall 21 extending in the height direction is provided on the upper bottom wall, a convex wall 23 is provided on both sides of the sunken wall 21, an upper side wall 22 is provided on both sides of the convex wall 23, and an outward flange 24 is provided at the end of the upper side wall 22. The B-pillar inner plate 30 comprises a B-pillar inner plate body 31, wherein concave parts 32 are arranged on two sides of the B-pillar inner plate body 31, and inward flanges 33 are arranged at the end parts of the concave parts 32. The lower bottom plate and the counter sink structure 11 of the upper hinge reinforcing plate 10 are welded and fixed to the lower bottom wall and the counter sink 21 of the B-pillar reinforcing plate 20, the upper side plate 12 and the lower side plate 15 of the upper hinge reinforcing plate 10 are welded and fixed to the upper side wall 22 and the lower side wall of the B-pillar reinforcing plate 20 with a gap between the protrusion 13 and the protrusion wall 23, the B-pillar reinforcing plate 20 is welded and fixed to the B-pillar inner plate 30 by the flange 24 and the flange 33, the upper side plate 12 extends in the direction of the B-pillar inner plate to abut against the inner recess 32 of the B-pillar inner plate, and the gap D between the end of the upper side plate 12 and the bottom end of the inner recess 32 is about 2 mm.

The prior art and the B-pillar reinforcement structure of the present embodiment are calculated as follows:

cross sectional moment of inertia contrast

Moment of inertia I of the prior art_x1＝2.754×10^-7m⁴

Moment of inertia I of the present embodiment_x2＝2.984×10^-7m⁴

The inertia moment is improved:

cross sectional area comparison

Cross-sectional area S of the prior art₁＝7.813×10^-4m²

Cross-sectional area S of the present example₂＝8.348×10^-4m²

Increase of sectional area:

and comparing the maximum bending stress of the B column, wherein the ultimate strength of the B column reinforcing plate is higher than that of the B column inner plate, so that only the maximum bending stress of the B column reinforcing plate side is compared. The maximum bending stress should occur at the maximum distance of the B-pillar stiffener from the axis X.

Distance R between maximum stress position of B-column reinforcing plate and form axis X in prior art_max1＝26mm

Distance R between maximum stress position of B-column reinforcing plate and form axis X in prior art_max2＝27mm

Assuming that the bending moment at this section is M, then:

the maximum stress of the B-pillar reinforcing plate in the prior art is as follows:

the utility model discloses a B post reinforcing plate maximum stress does:

maximum stress reduction:

under the same side collision test condition, to the B post simulation collision of prior art and this embodiment, the regional B post reinforcing plate above the upper hinge has appeared buckling, and the risk of injury to the human body is great. In the B-pillar reinforcement structure of the present embodiment, the boundary of the upper hinge reinforcement plate in the region above the hinge is extended, and a 2mm gap is reserved between the upper hinge reinforcement plate and the B-pillar inner plate corresponding to the concave portion of the B-pillar inner plate, so as to increase the area moment of inertia, reduce the maximum bending stress outside the B-pillar reinforcement plate, and increase the strength of the area. Meanwhile, the boundary of the upper hinge reinforcing plate is supported together with the B-pillar inner plate during collision, and a cavity with a triangular section can be formed, so that the stability of the area is greatly improved, and the bending during collision can be avoided. The side impact test also verifies the conclusion that the area of the embodiment is not bent, the invasion amount is small, and the risk of squeezing the head and the chest of a human body is effectively reduced.

For those skilled in the art, the specific embodiments are only exemplary descriptions of the present invention, and it is obvious that the present invention is not limited by the above-mentioned manner, and various insubstantial improvements are all within the protection scope of the present invention as long as the technical solution of the present invention is adopted.

Claims

1. A B-pillar reinforcing structure comprises an upper hinge reinforcing plate, a B-pillar reinforcing plate and a B-pillar inner plate, wherein the upper hinge reinforcing plate is welded on the inner side of the B-pillar reinforcing plate; the B post inner panel with the tip welded fastening of B post reinforcing plate, its characterized in that: the B column inner plate comprises a B column inner plate body, and two sides of the B column inner plate body are provided with inner concave parts; the upper hinge reinforcing plate comprises an upper base plate, a sinking platform structure extending along the height direction is arranged on the upper base plate, protruding parts are arranged on two sides of the sinking platform structure, and upper side plates are arranged on two sides of the protruding parts; the upper side plate extends towards the B-pillar inner plate and is abutted to the inner concave portion of the B-pillar inner plate, and a gap between the end portion of the upper side plate and the bottom end of the inner concave portion is about 2 mm.

2. The B-pillar reinforcement structure of claim 1, wherein: the upper hinge reinforcing plate further comprises a lower bottom plate, and lower side plates are arranged on two sides of the lower bottom plate.

3. The B-pillar reinforcement structure of claim 2, wherein: the B-pillar reinforcing plate comprises a lower bottom wall and an upper bottom wall, wherein lower side walls are arranged on two sides of the lower bottom wall, sunken walls extending along the height direction are arranged on the upper bottom wall, convex walls are arranged on two sides of each sunken wall, and upper side walls are arranged on two sides of each convex wall; the lower bottom plate and the sinking platform structure of the upper hinge reinforcing plate are respectively welded and fixed with the lower bottom wall and the sinking wall of the B-pillar reinforcing plate, and the upper side plate and the lower side plate of the upper hinge reinforcing plate are respectively welded and fixed with the upper side wall and the lower side wall of the B-pillar reinforcing plate.

4. The B-pillar reinforcement structure of claim 3, wherein: a gap is formed between the protruding part of the upper hinge reinforcing plate and the convex wall of the B-pillar reinforcing plate.

5. The B-pillar reinforcement structure of claim 3, wherein: the end part of the inner concave part of the B column inner plate is provided with an inner flanging, the end part of the upper side wall is provided with an outer flanging, and the B column reinforcing plate and the B column inner plate are welded and fixed through the outer flanging and the inner flanging.

6. The B-pillar reinforcement structure of claim 2, wherein: and the upper side plate and the lower side plate are both provided with transverse reinforcing ribs.

7. The B-pillar reinforcement structure of claim 1, wherein: the sinking platform is structurally provided with a plurality of mounting holes.