JP5976525B2 - Drainage structure of automobile suspension members - Google Patents

Description

  The present invention relates to an automobile suspension member having lower arm attachment openings on both sides in the vehicle width direction, and more particularly to a drainage structure that can prevent rainwater and the like that has entered from collecting inside.

  As a conventional automobile suspension member, a lower arm mounting opening is provided on both sides in the vehicle width direction, and a pair of front and rear bushes facing the vertical direction of the lower arm are inserted into the opening and fastened to the side. Yes (see, for example, Patent Document 1).

JP 2009-208678 A

  Although the conventional suspension member has the advantages of simple structure and low cost, there is a problem that rainwater or the like easily enters from large openings on both sides in the vehicle width direction. In order to cope with this problem, a drain hole for draining rainwater and the like that has entered is provided on the lower surface of the suspension member. However, in the case of a structure that supports the lower arm provided with the front and rear bushes facing in the vertical direction, the lower surface of the suspension member is set parallel to the road surface, so that drainage can be reliably performed even if a drain hole is provided. However, there is a problem that water accumulates inside and the suspension member is easily corroded.

  The present invention has been made in view of the above-described conventional situation, and provides a drainage structure for an automobile suspension member that can drain rainwater and the like and prevent corrosion while having openings on both sides in the vehicle width direction. The challenge is to do.

The invention of claim 1 includes upper and lower plate-like members joined so as to form a hollow shape, and has openings for inserting and fastening lower bushes on both sides in the vehicle width direction, and the lower plate. In the drainage structure of a suspension member for automobiles provided with a drain hole penetrating downward in the member,
At least the both side portions of the lower plate-shaped member are inclined in any one of the vehicle longitudinal directions, and a drain hole is provided in a lower end portion of the inclination.

The invention according to claim 2 includes upper and lower plate-like members joined so as to form a hollow shape, and has openings for inserting and fastening the bushes of the lower arm on both sides in the vehicle width direction, and the lower plate In the drainage structure of a suspension member for automobiles provided with a drain hole penetrating downward in the member,
At least the lower plate-like member, when viewed from the vehicle front-rear direction, includes a central portion and the both side portions that are located at a lower position than the central portion and are formed in a stepped manner with a rising portion interposed therebetween. The bulk member is disposed so as to close the opening, at least a part of the bulk member is welded and fixed to the rising portion, and the drain hole is provided in the vicinity of the lower end of the rising portion.

The invention according to claim 3 includes upper and lower plate-like members joined so as to form a hollow shape, and has openings for inserting and fastening the bushes of the lower arm on both sides in the vehicle width direction, and the lower plate In the drainage structure of a suspension member for automobiles provided with a drain hole penetrating downward in the member,
At least the lower plate-like member as viewed in the vehicle front-rear direction includes a center portion and the both side portions that are positioned lower than the center portion and are formed in a stepped manner with a rising portion interposed therebetween. The bulk member is inclined to either one of the longitudinal directions of the vehicle, and a bulk member is disposed on both sides so as to close the opening, and at least a part of the bulk member is welded and fixed to the rising portion. A drain hole is provided in the vicinity of the lower end and at the lower end of the slope.

  According to the first aspect of the present invention, since the both side portions of the lower plate-shaped member are inclined in any one of the vehicle front-rear direction and the drain hole is provided at the lower end portion of the inclination, the rainwater entering from the opening portion Can be positively guided to the drain hole by the inclination. Therefore, although it is a simple structure and low-cost suspension member having openings on both sides, rainwater and the like can be reliably drained, and corrosion of the suspension member can be prevented.

  According to the invention of claim 2, the lower plate-like member is provided with a central portion and both side portions that are positioned lower than the lower portion and are formed in steps with the rising portion interposed therebetween. Since the drain hole is formed in the vicinity of the lower end of the part, the rising part can suppress the rainwater entering from the opening part from flowing to the central part side and can be positively guided to the drain hole. The suspension member can be prevented from being corroded.

In addition, since the bulk member is disposed on both sides so as to close the opening, rainwater or the like entering from the opening can also be prevented from flowing to the center by the bulk member.

Furthermore, since at least a part of the bulk member is welded and fixed to the rising portion, the rising portion, which is likely to be a rigid break point, can be reinforced with the bulk member. As a result, the suspension member can be prevented from being deformed and the steering stability is improved. And road noise.

According to the invention of claim 3, the rising portion can suppress the rainwater and the like entering from the opening from flowing to the central portion side, and the entering rainwater and the like are positively introduced into the drain hole by the rising portion and the inclination. Therefore, drainage can be reliably performed, and corrosion of the suspension member can be prevented.

Moreover, it can prevent that the rain water etc. which entered from the said opening part flow to the center part side also by a bulk member.

Furthermore, the bulk member can reinforce a rising portion that tends to become a rigid breakpoint, can prevent the suspension member from being deformed, and is effective in improving steering stability and reducing road noise.

It is the disassembled perspective view seen from the vehicle diagonal front of the suspension member provided with the drainage structure by Example 1 of this invention. It is a top view of the said suspension member. It is a partial cross-section rear view of the suspension member. FIG. 4 is a cross-sectional left side view of the suspension member (a cross-sectional view taken along line IV-IV in FIG. 2). It is a perspective view of the bulk member arrange | positioned in the said suspension member. It is a side view which shows typically the attachment state to the vehicle body frame of the said suspension member.

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

  1 to 6 are views for explaining a drainage structure of a suspension member according to Embodiment 1 of the present invention. In the drawings, front, rear, left, and right are fronts when viewed in front of the vehicle. , Back, left, right.

In the figure, reference numeral 12 denotes left and right side members constituting a vehicle body skeleton member. The side members 12 are obliquely extended from the main body portion 12a to the vehicle width direction outside while extending from the main body portion 12a to the vehicle width direction. And a front portion 12b extending upward and horizontally forward therefrom.

The suspension member 1 is disposed so as to extend from the front end portion of the main body portion 12a of the side member 12 to the lower surface of the front portion 12b, and the suspension member 1 is fixed to the side member 12 by front and rear bolts 12c and 12d. Has been. The suspension member 1 is arranged to be stepped in a center portion 1a located in the center in the vehicle width direction, on the left and right sides in the vehicle width direction, and at a position lower than the center portion 1a when viewed in the vehicle longitudinal direction. Left and right side portions (side portions) 1b and 1b and left and right rising portions 1c and 1c arranged to connect the left and right side portions 1b and 1b and the central portion 1a. And have.

In addition, a recess 1e for securing an arrangement space for the engine unit or the like is formed in the front portion of the suspension member 1 so as to be recessed toward the rear of the vehicle.

The left and right side portions 1b and 1b have an inclination that becomes lower toward the front of the vehicle (see FIG. 4), and have an opening 1d for inserting a lower arm 4 described later. Further, the left and right rising portions 1c, 1c are inclined to become higher toward the center in the vehicle width direction (see FIG. 3).

The suspension member 1 is made of sheet metal, and the opening 1d is formed so that the upper member 2 having a substantially hat-shaped cross section and the lower member 3 also made of sheet metal and having a substantially hat-shaped cross section form a hollow shape. Are combined.

The upper member 2 includes a central upper wall portion 2a, a side upper wall portion 2b and a rising upper wall portion 2c that constitute upper portions of the central portion 1a, the left and right side portions 1b and the left and right rising portions 1c, The front and rear wall portions 2b 'and the front and rear flange portions 2d have a substantially hat-shaped cross section.

The lower member 3 includes a central lower wall portion 3a, a side lower wall portion 3b, and a rising lower wall portion that constitute lower portions of the central portion 1a, the left and right side portions 1b and the left and right rising portions 1c. 3c, front and rear wall portions 3c ', and front and rear flange portions 3d, which are substantially hat-shaped in cross section. The front and rear flange portions 3d and 3d of the lower member 3 and the front and rear flange portions 2d and 2d of the upper member 2 are joined by spot welding.

A concave bead 2e is formed on the left and right side upper walls 2b, 2b of the upper member 2 so as to protrude inside the opening 1d. The concave bead 2e is formed so as to extend over substantially the entire length in the front-rear direction of the side upper wall 2b and to be parallel to the road surface G when viewed in cross section. As described above, since the side upper wall 2b is inclined forward and downward, the concave bead 2e becomes shallower from the rear to the front. The concave bead 2e is formed so that front and rear mounting holes 2f and 2g for mounting the front bush 4a and the rear bush 4b of the lower arm 4 penetrate vertically, and the upper surfaces of the mounting holes 2f and 2g. A nut member 5a is fixed to the end.

A concave bead 3e is formed on the left and right side lower walls 3b, 3b of the lower member 3 so as to protrude inside the opening 1d. The concave bead 3e is formed so as to extend over substantially the entire length in the front-rear direction of the side lower wall portion 3b and to be parallel to the road surface G when viewed in cross section. As described above, since the side lower wall portion 3b is inclined forward and downward, the concave bead 3e becomes deeper from the rear to the front. In the concave bead 3e, front and rear mounting holes 3f and 3g for mounting the front bush 4a and the rear bush 4b of the lower arm 4 are formed so as to penetrate vertically.

The portions of the concave beams 2e and 3e where the front mounting holes 2f and 3f are formed are the mounting portions 4a 'of the front bush 4a, and the portions where the rear mounting holes 2g and 3g are formed are the above-described portions. It is a mounting portion 4b 'for the rear bush 4b.
A drain hole 3h penetrates downward at the lower end portion of the front lower slope of the left and right side lower wall portions 3b of the lower member 3, that is, at the front end portion and in the vicinity of the lower end of the rising lower wall portion 3c. It is formed as follows. The drain hole 3h is for draining rainwater or the like that has entered from the opening 1d.

The lower arm 4 includes an arm body 4e having a bifurcated shape, and the front bush 4a and the rear bush 4b fixed to the base end portion of the arm body 4e with the axis thereof directed in the vertical direction. The front bush 4a and the rear bush 4b are obtained by baking and fixing a rubber member 4f between an inner cylinder 4c and an outer cylinder 4d.

The lower arm 4 has a front bush 4a with its axis lined up and down to coincide with the mounting holes 2f and 3f, and disposed between the upper and lower lateral sides 6a and 6b of a bulk member 6 to be described later. The rear bush 4b is aligned with the mounting holes 2g and 3g with its axis line directed up and down, and in this state, a bolt 5 is inserted into the inner cylinder 4c from below and is tightened to the nut member 5a to be attached to the suspension member 1. It is supported.

Here, since the head 5b of the front bolt 5 is located in the concave bead 3e of the lower member 3, it is difficult for an obstacle on the road surface to hit, and the head 5b of the bolt 5 is caused by an impact from the obstacle. It is possible to prevent damage or loosening of the bolt 5.

A bulk member 6 made of sheet metal is disposed in the left and right sides of the suspension member 1. The bulk member 6 has a concave cross-sectional shape having an upper horizontal side portion 6a, a lower horizontal side portion 6b, and a vertical side portion 6c, and has substantially the same length as the longitudinal length of the suspension member 1. The suspension member 1 is disposed slightly obliquely so as to extend from the side portion 1b to the rising portion 1c.

The front flange portion 6d formed at the front end portion of the bulk member 6 is fixed by welding to the front wall portion 2b 'of the side upper wall portion 2b and the front wall portion 3b' of the side lower wall portion 3b, and is attached to the rear end portion. The formed rear flange 6e is welded and fixed to the rear wall 3c ′ of the rising lower wall 3c and the rear wall 2c ′ of the rising upper wall 2c, and the rear 6b ′ of the lower horizontal side 6b is The rear part 6a 'of the upper horizontal side part 6a is fixed to the rising lower wall part 3c by welding to the rising upper wall part 2c. Further, as will be described later, the front side 6h of the upper side 6a and the lower side 6b of the bulk member 6 are fixed to the inner surfaces of the concave beads 2e and 3e by welding.

In this way, the bulk member 6 includes the side upper wall portion 2b, the side lower wall portion 3b, the rising upper wall portion 2c, the rising lower wall portion 3c, the front and rear wall portions 2b ', 3c' of the suspension member 1. And the opening 1d is substantially blocked.

Further, attachment holes 6f and 6g for attaching the front bush 4a are formed in the upper and lower sides 6a and 6b of the bulk member 6 in the longitudinal direction so as to penetrate vertically. . The front portion 6h is formed by attaching the mounting holes 6f and 6g to the mounting holes 2f and 2f in the mounting portion 4a 'of the front bush 4a of the concave beam 2e of the side upper wall portion 2b and the concave beam 3e of the side lower wall portion 3b. The upper and lower lateral sides 6a and 6b are fixed to the inner surfaces of the upper and lower concave beads 2e and 3e. The bolt 5 is inserted through the mounting holes 2g, 6g, 6f, 2f.

Further, in the vicinity of the attachment portion 4a 'of the left and right front bush 4a of the suspension member 1, left and right attachment leg portions 9 are formed so as to protrude upward. The mounting leg portion 9 is a cylindrical body in which a main body portion 10 located on the inner side in the vehicle width direction and a reinforcing portion 11 located on the outer side in the vehicle width direction are welded. A collar 13a is interposed at the upper end portion of the mounting leg portion 9, and is fastened and fixed to the front portion 12b of the side member 12 by a bolt 12c.

Further, a collar 13b is interposed between the rear end corner portions of the side upper wall portion 2b and the side lower wall portion 3b, and the rear end portion of the suspension member 1 is the body portion of the side member 12 in the collar 13b. A bolt 12d for fixing to 12a is inserted.

The reinforcing portion 11 has a protruding portion 11b protruding outward in the vehicle width direction, and the lower end portion of the reinforcing portion 11 is a portion to which the upper lateral side portion 6a of the bulk member 6 of the side upper wall portion 2b is fixed. The protrusion 11b is fixed to the upper surface of the concave bead 2e.

The lower end portion of the main body portion 10 penetrates the side upper wall portion 2b and the side lower wall portion 3b downward and is welded and fixed to the side upper wall portion 2b and the side lower wall portion 3b. Are fixed to the vertical wall 6c by welding.

According to the first embodiment, the left and right side lower wall portions 3b of the lower member 3 are inclined forward of the vehicle, and the drain hole 3h is provided at the front end of the inclination. Can be positively guided to the drain hole 3h by the inclination. Therefore, although it is the structure simple and low-cost suspension member 1 which has the opening part 1d on both sides, rain water etc. can be drained reliably and corrosion of the suspension member 1 can be prevented.

  Further, the lower member 3 includes a central lower wall portion 3a and a side lower wall portion 3b which is located at a lower position than the lower member 3 and is formed in a stepped manner with the rising lower wall portion 3c interposed therebetween, and the drain Since the hole 3h is positioned at the front end portion of the slope and in the vicinity of the lower end of the rising lower wall portion 3c, rain water or the like that has entered from the opening 1d is allowed to enter the central portion 1a side by the rising lower wall portion 3c. , And can be positively guided to the drain hole 3h. As a result, the drainage can be reliably drained and corrosion of the suspension member 1 can be prevented.

Further, since the bulk member 6 is disposed in the vicinity of the opening 1d so as to close the opening 1d, rainwater or the like entering from the opening 1d is prevented from flowing to the central portion 1a by the bulk member 6 as well. it can. Since the lower surface of the bulk member 6 is placed on the concave bead 3e protruding inwardly, a gap is formed between the lower surface and the side lower wall portion 3b, and the opening portion Rainwater or the like that has entered 1d passes through the gap and is guided to the drain hole 3h without any problem.

Further, a bulk member 6 is disposed in the vicinity of the opening 1d of the suspension member 1, and the front flange portion 6d of the bulk member 6 is placed in front of the front wall portion 2b 'of the side upper wall portion 2b and the front side wall portion 3b. The rear flange 6e is welded and fixed to the rear wall portion 3c 'of the rising lower wall portion 3c and the rear wall portion 2c' of the rising upper wall portion 2c, and the rear portion 6b of the lower horizontal side portion 6b. 'Is fixed to the rising lower wall portion 3c and the rear portion 6a' of the upper horizontal side portion 6a is fixed to the rising upper wall portion 2c by welding, and the front side 6h of the upper horizontal side portion 6a and the lower horizontal side portion 6b is connected to the concave bead. Since it is fixed to the inner surfaces of 2e and 3e by welding, the side upper wall portion 2b, the side lower wall portion 3b, the rising upper wall portion 2c, the rising lower wall portion 3c, the front wall portions 2b ', 3b' and the rear of the suspension member 1 Can bridge walls 2c 'and 3c' It is possible to increase the rigidity in the periphery of the above opening 1d.

Further, since the rear portion 6b 'of the lower side portion 6b of the bulk member 6 is welded and fixed to the rising lower wall portion 3c, and the rear portion 6a' of the upper side portion 6a is fixed to the rising upper wall portion 2c, it becomes a rigid break point. It is possible to effectively reinforce the easily rising part.

As a result, the suspension member 1 can be prevented from being deformed, and it is effective in improving the steering stability and reducing road noise.

In the above embodiment, the case where the lower arm 4 is of a type in which both the front and rear bushes 4a and 4b are oriented in the vertical direction, the present invention is directed to the front bush only in the vertical direction. The rear bush can also be applied to a lower arm of a type in which the axis is directed in the longitudinal direction of the vehicle or vice versa.

In the above-described embodiment, the case where the side upper wall portion 2b and the side lower wall portion 3b are formed to be front-lowered has been described. However, in the present invention, the side lower wall portion 3b may be inclined to the rear lower side. You may incline in front-down or back-down.

In the above-described embodiment, the case where both the upper member 2 and the lower member 3 have the rising portion has been described. However, in the present invention, only the lower member 3 may have the rising portion.

1 Suspension member 1d Openings 2 and 3 Upper and lower members (upper and lower plate members)
3a Center lower wall (center)
3b Side lower wall (side)
3c Standing lower wall (rise part)
3h Drain hole 4 Lower arms 4a, 4b Front and rear bushes 6 Bulk member 6b 'Rear side of lower side (at least part of bulk member)

Claims (3)

It has upper and lower plate-like members joined so as to form a hollow shape, has openings for inserting and fastening lower arm bushes on both sides in the vehicle width direction, and penetrates the lower plate-like member downward. In the drainage structure of a suspension member for automobiles with a drain hole,
At least the both side portions of the lower plate-like member are inclined in any one of the vehicle longitudinal directions,
A drainage structure for a suspension member for an automobile, wherein a drain hole is provided at the lower end of the slope. It has upper and lower plate-like members joined so as to form a hollow shape, has openings for inserting and fastening lower arm bushes on both sides in the vehicle width direction, and penetrates the lower plate-like member downward. In the drainage structure of a suspension member for automobiles with a drain hole,
In the vehicle longitudinal direction view, at least the lower plate-like member includes a central portion and the both side portions that are positioned lower than the central portion and formed in a stepped manner across the rising portion,
On both sides, a bulk member is arranged so as to close the opening,
Fixing at least a part of the bulk member to the rising portion by welding;
A drainage structure for a suspension member for an automobile, wherein the drain hole is provided near the lower end of the rising portion. It has upper and lower plate-like members joined so as to form a hollow shape, has openings for inserting and fastening lower arm bushes on both sides in the vehicle width direction, and penetrates the lower plate-like member downward. In the drainage structure of a suspension member for automobiles with a drain hole,
In the vehicle longitudinal direction view, at least the lower plate-like member includes a central portion and the both side portions that are positioned lower than the central portion and formed in a stepped manner across the rising portion,
The both side portions are inclined to either one of the longitudinal direction of the vehicle,
On both sides, a bulk member is arranged so as to close the opening,
Fixing at least a part of the bulk member to the rising portion by welding;
A drainage structure for a suspension member for an automobile, wherein a drain hole is provided in the vicinity of the lower end of the rising portion and at the lower end of the slope.

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