JP3538463B2 - Suspension member - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a suspension arm.
Arm to attach one end of the arm to the body frame.
Suspension body interposed between the body frame
With regard to the ba , especially the drain hole can be easily formed
This relates to a suspension member .

[0002]

2. Description of the Related Art For example, in order to pivotally connect one end of a suspension arm to a vehicle body frame, a suspension member interposed between the arm pivot portion and the vehicle body frame is formed by welding a pressed steel plate. It is generally formed to be hollow.

As shown in FIG. 3, an open end of a cylindrical male member 22 is fitted into an open end of a cylindrical female member 21 so that the outer surface of the male member 22 is Some of the openings 21 are welded to each other by fillet welding. Both the female and male members 21 and 22 are formed by overlapping the flange portions on both sides of a pair of upper and lower gutter-shaped plate members that are press-formed and joined by spot welding. In order to alleviate stress concentration on the weld bead due to bending or the like, the bottom plate 21a of the female member 21
A substantially V-shaped notch 23 is formed at the opening end of the.

[0004] In such a suspension member, when the vicinity of the joint is the lowermost part of the member, in order to prevent water infiltrating inside the member from accumulating and corroding the plate material, conventionally, a trim at the time of press forming is conventionally used. Drain hole 2 in process
4 had been perforated.

[0005]

However, in such a conventional drainage structure, if the notch and the drainage hole are simultaneously punched during press forming, the trim range is widened and the manufacturing cost is increased. There was a disadvantage that it increased. In addition, since they are separated from each other, water may accumulate in the welded portion due to deformation of the member or the like, and rust may be generated.

The present invention has been devised to solve such disadvantages of the prior art, and its main objects are as follows.
In particular, it is an object of the present invention to provide a suspension member that can prevent water from accumulating in a weld portion and reduce manufacturing costs.

[0007]

SUMMARY OF THE INVENTION According to the present invention, there is provided a suspension frame having a sub-frame between an arm attachment portion and a body frame for pivotally connecting one end of a suspension arm to a body frame. A suspension member made of a steel plate to be mounted, wherein a cylindrical male member 11 having a substantially V-shaped notch 13 formed therein for alleviating stress concentration on a weld bead is provided with a cylindrical male member. The open end of the member 12 is fitted, and the open end of the female member 11 and the edge of the notch 13
Wherein a part connecting portion A formed by joining outer periphery and at the fillet weld of the male member 12 is formed at the bottom, in the connection A, the notch 13, the lower surface in the female member 11
The lower end of the bottom plate 11a located on the side is formed deeper than a predetermined fitting allowance so that both the female and male members 1
This is achieved by providing a suspension member characterized in that a water draining hole 14 communicating between the inside and the outside is defined in the bottom portion of the notch 13 in a state where the first and second fittings 1 and 12 are fitted. You.

[0008]

In this way, the bottom portion of the cutout becomes a hole communicating between the inside and the outside when the female member and the male member are fitted, so that there is no need to provide a separate drainage hole, and the trim range is reduced. I can do it. In addition, since the formed hole is arranged close to the welded portion, it is possible to prevent water from accumulating in the welded portion.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings.

FIG. 1 shows a main part of a suspension member of an automobile to which the present invention is applied , and is an enlarged view of a connecting portion indicated by A in FIG. Note that, in FIG. 1, for convenience of description, the upper and lower sides are shown upside down, and the upper side of the figure is the lower side when actually used.

As shown in FIG. 2, the suspension member 1 extends in a pair in the front-rear direction of the vehicle body, and has three horizontal members 2, 3 and 4 extending in the left-right direction. They are integrally connected so as to form a Japanese character form a so-called subframe. On the upper surface of the suspension member 1, a double wishbone type front suspension 5 is provided.
The inner end of the lower arm 6 is pivotally mounted.

The connection portion of the suspension member 1 shown by A in FIG. 2 is a cylindrical female member 1 as shown in FIG.
1. The open end of the cylindrical male member 12 is fitted into the open end of
The outer surface of the male member 12 and the opening surface of the female member 11 are joined by fillet welding. These female and male members 11.1
No. 2 is formed by overlapping the flange portions on both sides of a pair of upper and lower gutter-like plate members formed by press forming and joining them by spot welding. A substantially V-shaped notch 13 deeper than the fitting margin is formed at the opening end of the bottom plate 11a of the female member 11. By fitting both the male and female members while leaving the bottom of the notch 13 in this manner,
A hole 14 is formed in the bottom of the notch 13 to communicate the inside and the outside.

[0013]

As is apparent from the above description, according to the suspension member of the present invention, it is not necessary to separately form a drain hole, so that the manufacturing cost can be reduced. Moreover, since the drain hole is formed close to the weld,
Water can be prevented from accumulating in the welded portion, which is effective in improving rust prevention.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a connection portion of a suspension member to which the present invention is applied.

FIG. 2 is a perspective view showing the entire front wheel sub-frame.

FIG. 3 is a perspective view showing a connection portion of a conventional suspension member.

[Explanation of symbols]

1 Suspension member 2.3.4 horizontal member 5 Suspension 6 Lower arm 11 Female member 11a Bottom plate 12 Male members 13 Notch 14 holes 21 Female member 21a bottom plate 22 Male member 23 Notch 24 drain holes

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-5-310147 (JP, A) JP-A-3-59224 (JP, U) JP-A-6-40773 (JP, U) JP-A-56 150669 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) B62D 21/00 B60G 7/00

Claims (1)

(57) [Claims] A steel plate suspension member interposed as a sub-frame between an arm pivot portion and a vehicle body frame so as to pivotally connect one end of the suspension arm to a vehicle body frame. the open end of the tubular female member generally V-shaped notch is formed in order to mitigate stress concentration and fitting the open end of the tubular male member, the open end and the switching of the female member
A connection portion formed by joining the edge of the notch and the outer periphery of the male member by fillet welding is formed at the lowermost portion. In this connection portion, the notch is connected to the female member. In
By forming it deeper than a predetermined fitting margin in the opening end portion of the bottom plate portion located on the lower surface side, the inside and outside communicate with the bottom portion of the notch in a state where the female and male members are fitted. A suspension member, wherein a hole for draining water is defined.