JP2014162469A - Strut support portion structure of suspension tower for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a strut support portion structure of a suspension tower for a vehicle that can reduce weight of an upper support without lowering weld strength and can perform temporary holding accurately during spot welding, and further can improve rigidity of the strut support portion without performing reinforcement using another member.SOLUTION: When an upper portion 4c' and a lower portion 4c" of a flange portion 4c of an upper support 4 and an opening portion 3b of a struct support portion 3 are spot-welded alternately in a zigzag form in a circumferential direction, respectively, a notch portion 4d is formed at a lower portion corresponding to an upper welded position 4c' of the flange portion 4c of the upper support 4, a recessed bead 3f having inward recessed shape is formed at the strut support portion 3 to extend vertically, and the notch portion 4d of the upper support 4 is engaged with an upper end portion 3g of the recessed bead 3f.

Description

  The present invention relates to a strut support part structure for a suspension tower for a vehicle in which an upper end opening part of a strut support part and a flange part of an upper support inserted and arranged in the opening part are joined and fixed by spot welding.

  As this type of strut support portion structure, for example, Patent Document 1 discloses spot welding of an upper end opening portion of a strut support portion formed in a wheel house and a flange portion of an upper support inserted and arranged in the upper end opening portion. The structure joined by is disclosed. In this case, in order to increase the joint strength, the upper and lower portions of the flange portion and the upper end opening are alternately spot-welded so as to form a zigzag shape in the circumferential direction (see FIG. 4 of Patent Document 1). .

Japanese Patent No. 4895156

  By the way, in the conventional strut support part structure, when spot welding the upper part of the flange part of the upper support, the lower part of the upper welded part of the flange part does not contribute to the welding strength. There is a problem of causing an increase in weight.

  In the conventional structure, the upper support cannot be temporarily held on the strut support portion during spot welding, so that there is a problem that workability at the time of assembly is low.

  Further, it is necessary to increase the rigidity of the strut support portion against the pushing load. However, if additional parts are added and reinforced, the cost and weight increase. Therefore, improvement in this respect is demanded.

  The present invention has been made in view of the above-mentioned conventional situation, can reduce the weight of the upper support without reducing the welding strength, can accurately perform temporary holding during spot welding, An object of the present invention is to provide a strut support portion structure for a suspension tower for a vehicle that can increase the rigidity of the strut support portion without reinforcement by another member.

The present invention includes a strut support formed to extend upward in the wheel house;
An upper support for supporting and fixing an upper end portion of a suspension strut connected to a wheel, and a flange portion of the upper support is inserted and disposed in an opening formed at the upper end of the strut support portion. In the strut support part structure of a suspension tower for a vehicle, in which the opening is joined and fixed by alternately spot-welding the upper part and the lower part in a zigzag shape in the circumferential direction, the flange part of the upper support, A notch portion is formed in the lower portion corresponding to the upper spot welded portion, and a concave bead having a concave shape is formed on the strut support portion so as to extend in the vertical direction. The upper support is characterized in that a notch portion of the upper support is engaged with the upper end portion.

  According to the strut support structure according to the present invention, the notch portion is formed in the lower portion corresponding to the upper welded portion of the flange portion of the upper support, so that the portion that does not contribute to the welding strength of the upper support is notched. Further, it is possible to reduce the weight of the upper support while ensuring the welding strength.

  In the present invention, since the concave bead is formed in the strut support portion so as to extend in the vertical direction, it is possible to increase the rigidity of the strut support portion against the thrust load from the road surface without reinforcing by another part, thereby reducing the cost. It is possible to improve the handling stability while aiming.

  Further, in the present invention, since the notch portion of the upper support is engaged with the concave bead of the strut support portion, the upper support can be temporarily held in a state of being positioned on the strut support portion, and assembly when performing spot welding is performed. Accuracy and workability can be improved.

It is a perspective view of the strut support part of the suspension tower for vehicles by Example 1 of the present invention. It is a perspective view of the said strut support part. FIG. 3 is a cross-sectional view of the strut support portion (a cross-sectional view taken along line III-III in FIG. 2).

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

  1 to 3 are views for explaining a strut support portion structure of a suspension tower for a vehicle according to a first embodiment of the present invention.

  In the figure, reference numeral 1 denotes a suspension tower of an automobile. The suspension tower 1 includes a strut support portion 3 formed integrally with a wheel house 2a of a fender apron 2 so as to extend upward, and the strut support portion 3 And an upper support 4 disposed.

  The suspension tower 1 has an upper end 1 a coupled to the apron upper member 5 and a lower end 1 b coupled to the side member 6. The front end portion of the apron upper member 5 and the side member 6 are coupled by a coupling member 7 coupled so as to surround the front side of the suspension tower 1. A dash panel (not shown) is disposed and fixed on the vehicle rear side of the suspension tower 1.

  The strut support portion 3 includes a vertical wall portion 3a extending so as to rise upward from the wheel house 2, and an opening 3b formed at the upper end of the vertical wall portion 3a. The vertical wall portion 3a includes a front side wall 3c, a vehicle inner side wall 3d, and a rear side wall 3e.

  The upper support 4 has a lower end connected to a front wheel (not shown), and an upper wall 4b in which a support hole 4a for supporting an upper end 10c of a suspension strut 10 including an oil damper 10a and a coil spring 10b is formed. And a flange portion 4c that is integrally bent at the outer peripheral edge of the upper wall portion 4b. Thereby, it is comprised so that the thrust load from the road surface transmitted to a vehicle body via a front wheel may be absorbed. The suspension strut 10 is supported by bolting and fixing the upper spring receiving member 10d to the lower surface of the upper wall portion 4b of the upper support 4.

  The flange portion 4 c of the upper support 4 is inserted into the opening 3 b of the strut support portion 3. The opening 3b and the flange 4c are alternately spot-welded so that the upper part 4c 'and the lower part 4c' 'of the opening 3b and the lower part 4c' 'form a staggered pattern at a predetermined interval in the circumferential direction. It is fixed by joining.

  A substantially semicircular cutout portion 4d that opens downward is formed in a lower portion of the flange portion 4c of the upper support 4 corresponding to the upper welded portion 4c ′. Each notch 4d is formed in a portion corresponding to all the upper welded portions 4c '.

  As shown in FIG. 2, when the depth of the notch 4d is r, the height of the flange 4c is D, and the dimension of the upper portion 4c 'of the flange 4c obtained by subtracting r from this D is d. r / d = 0.3 is set. Incidentally, when D is 26 mm, r is 6 mm. By setting in this way, it is possible to avoid the stress due to the pushing load from being concentrated on the notch 4d.

  On the vertical wall portion 3a of the strut support portion 3, concave beads 3f having a concave shape on the inner side are formed so as to extend in the vertical direction with a predetermined interval in the circumferential direction. The concave bead 3f is formed in a portion corresponding to each notch 4d of the front side wall 3c, the vehicle inner side wall 3d, and the rear side wall 3e of the vertical wall 3a. Each concave bead 3f on the front side wall 3c extends to the vicinity of the front end of the wheel house 2a.

  Each concave bead 3f is formed such that the upper end 3g is tapered, and the upper end 3g extends so as to be close to the upper welded portion 4c '.

  The notch 4d of the upper support 4 is engaged with the upper end 3g of each concave bead 3f. Specifically, the flange portion 4c of the upper support 4 is inserted into the opening 3b of the strut support portion 3, and each notch portion 4d of the flange portion 4c is connected to the upper end portion 3g of the concave bead 3f of the strut support portion 3. By engaging with each other, the upper support 4 is positioned and temporarily held on the strut support portion 3, and spot welding is performed in this state. Here, the notch 4d of the upper support 4 may be engaged with at least one concave bead 3f of the front side wall 3c, the vehicle inner side wall 3d, and the rear side wall 3e.

  According to the present embodiment, the notch 4d is formed in the lower portion corresponding to the upper welded portion 4c 'of the flange portion 4c of the upper support 4, and therefore, by notching the portion that does not contribute to the welding strength of the upper support 4. Thus, it is possible to reduce the weight of the entire upper support 4 while ensuring the welding strength.

  Further, by forming the notch portion 4da in the flange portion 4c of the upper support 4, it is possible to prevent the occurrence of wrinkles and residual stress when the upper support 4 is formed by drawing and to improve the reliability of the quality. it can.

  In this embodiment, since the concave beads 3f are formed in the strut support portion 3 so as to extend in the vertical direction with a predetermined interval in the circumferential direction, the reinforcement from the road surface of the strut support portion 3 can be performed without reinforcing by another part. The rigidity with respect to the thrust load can be increased, and the steering stability can be improved while reducing the cost.

  Further, in this embodiment, the notch 4d of the upper support 4 is engaged with each concave bead 3f of the strut support 3, so that the upper support 4 can be temporarily held in a state where it is positioned on the strut support 3. It is possible to improve the assembly accuracy and workability when performing spot welding.

DESCRIPTION OF SYMBOLS 1 Suspension tower 2 Wheel house 3 Strut support part 3b Opening part 3f Concave bead 3g Upper end part 4 Upper support 4c Flange part 4c 'Upper part 4c''Lower part 4d Concave bead 10 Suspension strut 10c Upper end part

Claims (1)

A strut support formed to extend upward in the wheel house;
An upper support for supporting and fixing the upper end of the suspension strut connected to the wheel,
In the opening formed at the upper end of the strut support portion, the flange portion of the upper support is inserted and arranged,
In the strut support part structure of a suspension tower for a vehicle, wherein the flange part and the opening part are joined and fixed by alternately spot-welding the upper part and the lower part of the flange part in a zigzag shape in the circumferential direction.
A notch portion is formed in a lower portion of the flange portion of the upper support corresponding to the upper spot welding spot,
The strut support portion is formed so that a concave bead having a concave shape on the inside extends in the vertical direction,
A strut support portion structure for a suspension tower for a vehicle, wherein a notch portion of the upper support is engaged with an upper end portion of the concave bead.

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