JP2973825B2 - Rear pillar lower joint structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a connecting portion between a lower end of a rear pillar forming a lower corner portion of a back door opening and both ends of a tail cross member.

[0002]

2. Description of the Related Art A corner portion A below a back door opening of a vehicle having a back door B as shown in FIG. An end of a tail cross member that extends in the vehicle width direction and forms a lower edge of the door opening is coupled to the door. The corner portion A is a location where stress is concentrated during vehicle vibration, and high rigidity is required.

As shown in FIG. 4, the rear pillar 2 has a closed cross section formed by an outer plate 21 and an inner plate 22, and a lower end portion thereof is bent in an L-shape. The tail cross member 1 having a closed cross section with the outer plate 11 and the inner plate 12 is inserted and welded to the horizontal terminal portion at the lower end. The insertion end of the tail cross member has increased rigidity as a bulkhead that joins side edges of the outer plate 11 and the inner plate 12 to partition a closed cross section on the horizontal side of the corner.

[0004]

However, in the conventional connection structure, the rigidity is not always sufficient, and stress is particularly concentrated on the inner diameter side of the corner portion A, so that the cross section of the corner portion A may be collapsed.

Accordingly, an object of the present invention is to provide a connection structure between a tail cross member and a rear pillar which has high rigidity while suppressing an increase in the number of constituent members as much as possible.

[0006]

As shown in FIG. 2, a lower end of a rear pillar 2 having a closed cross section formed by an outer plate 21 and an inner plate 22.
And a corner connecting portion A (FIG. 1) in which both ends of the tail cross member 1 forming a closed cross section by the outer plate 11 and the inner plate 12 are connected to each other in the corner connecting portion A from the horizontal side to the vertical side of the connecting portion. Set up Reinforcement 3
The lower end is connected to the end portion of the tail cross member outer plate 11, and the peripheral edge thereof is connected to the end of the tail cross member inner plate 12 and the lower end of the rear pillar inner plate 22 connected thereto in series. A for Reinforcement 3
A double closed cross-section structure composed of closed cross-sections 5 and 6 partitioned by. More specifically, the above-mentioned reinforcement 3
Is a substantially L-shaped lid-shaped plate member along the corner shape of the connecting portion A, and the horizontal side of the reinforcement 3 is connected to the end portion of the tail cross member outer plate 11 having a U-shaped cross section. The lower edge 32 is located at the lower edge of the tail cross member inner plate 12, and the outer peripheral edges 33, 34 are located at the tail cross member inner plate 12 and the rear pillar inner plate 22.
The inner peripheral edge 31 is connected to the lower front edge of the rear pillar inner plate 22 in series, and the corner connecting portion A of the closed cross section is extended from the horizontal side to the vertical side to form the reinforcement 3
And a double cross section composed of a closed cross section 5 and a closed cross section 6 partitioned by.

[0007]

[Function] The entire corner joint below the back door opening is 2
Due to the heavy closed cross-sectional structure, high rigidity is exhibited against the stress acting on the joint. The added members are
Since only the reinforcement 3 and the reinforcement 3 are provided inside the joint of the closed cross section, the weight increase is extremely small and the appearance is not impaired.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A corner connecting portion A (FIG. 1) below a back door opening of a vehicle body has a closed cross-sectional structure in which a lower end of a rear pillar having a closed cross section is connected to a side end of a tail cross member having a closed cross section. I have.

In FIG. 3, reference numeral 12 denotes an inner plate of a tail cross member, and a lower edge of a brace 22 'forming the lower end of the rear pillar 2 is welded to an upper edge of the terminal portion. On the other hand, reference numeral 11 denotes a tail cross member outer plate, which has a substantially U-shaped cross section, is shorter than the inner plate 12, and a terminal portion has a lid shape. A reinforcement 3 is welded to a terminal portion of the outer panel 11. Reinforcement 3 is
It is a substantially L-shaped lid, with the lower horizontal side having substantially the same width as the tail cross member outer panel 11 and the vertical side extending upward from the tail cross member outer panel 11. The L-shaped inner peripheral edge 31 is connected to the tail cross member inner plate 1.
2 has a shape conforming to the corner shape from the upper edge to the inner edge of the brace 22 '. The lower horizontal side is welded to the end of the tail cross member outer plate 11. The tail cross member outer plate 11, the inner plate 12, the reinforcement 3, and the brace 22 'are connected to each other and integrated as shown in FIG. F is a floor.

The details of the coupling structure will be described with reference to FIG. FIG. 2B is a vertical sectional view taken along the line IIB-IIB in FIG. 2A, and FIG. 2C is a horizontal sectional view taken along the line IIC-IIC in FIG. 2A. As shown in FIG. 2 (A) and FIG. 2 (B), the reinforcement 3, the outer plate 1 thereunder Yes welded to the terminal portion of the tail cross member outer panel 11
1 form a closed section 4. The lower edge 32 is a lower edge of a terminal portion of the tail cross member inner plate 12 having an L-shaped cross section,
It is overlap welded to the rear pillar outer plate 21. The reinforcement 3 extends in the rising direction with a slight inclination, and its upper edge 34 is joined to the brace 22 ′ welded to the tail cross member inner plate 12, and the reinforcement 3 is connected to the tail cross member inner plate 12 and The brace 22 'forms a trapezoidal closed section 5 in the vertical direction.
The rear pillar outer plate 21 extends downward so as to cover the outside of the corner portion.

[0011] As shown in FIG. 2 (A) and FIG. 2 (C), the reinforcement 3 which is welded to the tail cross member outer panel 11, without a chevron horizontal cross-sectional shape, the horizontal side
The lower portion of the inner peripheral edge 31 forming the front end of the tail cross member inner plate 12 is welded to the tail cross member inner plate 12, and extends in the vehicle width direction along the outer plate 11, and the lower half of the outer peripheral edge 33 is formed of the tail cross member inner plate 12. The closed section 5 is welded to a terminal portion and has a triangular shape in the horizontal direction. The lower end of the rear pillar outer plate 21 is a curved surface surrounding a corner portion from the rear pillar 2 to the tail cross member 1, and its leading edge is overlapped with the tail cross member outer plate 11 and welded. It is connected to the edge of the member inner plate 12.

As shown in FIG. 2A, the reinforcement 3 is formed by welding an arc-shaped edge above the inner peripheral edge 31 along an arc-shaped side edge of the brace 22 '. Thereby, the closed section 5 including the reinforcement 3, the tail cross member inner plate 12 and the brace 22 ′ has a closed cross section structure extending from the tail cross member 1 side to the rear pillar 2 along the corner A ′ side, and Around it, the closed section 5 is separated from the reinforcement 3 to form a closed section 6 surrounded by the rear pillar outer plate 21.

[0013]

According to the present invention, a reinforcement is provided in a corner-shaped joint between the end portion of the tail cross member and the lower portion of the rear pillar to form a double closed cross section extending from the tail cross member side to the rear pillar. The rigidity is greatly enhanced, and the cross-section of the coupling portion is prevented from collapsing due to vibration. In addition, the appearance of the joint portion is not impaired, and the weight increase is extremely small.

[Brief description of the drawings]

FIG. 1 is a rear perspective view of a vehicle having a back door.

FIG. 2 (A) shows an embodiment of the present invention, and is a perspective view of a lower pillar lower joint portion, and FIG. 2 (B) is FIG. 2 (A).
FIG. 2C is a vertical cross-sectional view taken along the line IIB-IIB of FIG.
FIG. 2 is a horizontal sectional view taken along a line IIC-IIC in FIG.

FIG. 3 is an exploded perspective view of a lower pillar lower joint portion shown in FIG. 2 (A).

FIG. 4 is a perspective view of a conventional rear pillar lower connecting portion.

[Explanation of symbols]

A Back door opening lower corner (rear pillar lower joint) B Back door 1 Tail cross member 11 Tail cross member outer plate 12 Tail cross member inner plate 2 Rear pillar 21 Rear pillar outer plate 22 Rear pillar inner plate 22 'Brace 3 Reinforcement 5, 6 double closed sections

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-3-109982 (JP, A) JP-A-58-30873 (JP, A) JP-A 63-69680 (JP, U) JP-A 61-69680 131376 (JP, U) Japanese Utility Model 60-157586 (JP, U) Japanese Utility Model 58-111672 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) B62D 25/04 B62D 25 / 08

Claims (1)

(57) [Claims] 1. A lower end of a rear pillar which forms left and right side edges of a back door opening of a vehicle body and forms a closed cross section by an outer plate and an inner plate.
If, at the corner coupling portion and the opposite ends of the tail cross member forming a closed cross section with the outer plate and the inner plate forms the lower edge of the back door opening is attached to the corner shape corner binding portion
A reinforcement of a substantially L-shaped lid-shaped plate is provided along the lower end thereof, and the lower end thereof is connected to the end of the outer plate of the tail cross member, and the periphery thereof is connected to the end of the inner plate of the tail cross member and to this end. attached to a series in the rear pillar inner plate lower portion, the corner connection portion, the lower coupling structure rear pillar, characterized in that a double closed cross section which is partitioned by the Riinfo <br/> assessments.