JP4044803B2 - Vehicle stabilizer mounting structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a stabilizer mounting structure for a vehicle.
[0002]
[Prior art]
It is well known to attach a stabilizer to the vehicle body in order to increase the roll rigidity of the vehicle. The stabilizer is generally attached to the vehicle body member. However, Japanese Patent Laid-Open No. 9-226631 prepares a bracket connected to the front end of the vehicle body side frame and the front end of the sub side frame, and the stabilizer is attached to the bracket. In addition, it discloses that the end of the stabilizer is coupled to the lower arm of the suspension mechanism.
[0003]
[Problems to be solved by the invention]
According to such an attachment structure, since the stabilizer bracket is connected to the vehicle body side frame, it is considered that the stabilizer support rigidity or attachment rigidity can be secured, but the vehicle body side frame is a so-called cantilever structure. Therefore, the front end of the vehicle body side frame is the place where the amplitude is the largest due to vibration, and it is considered that the vibration of the vehicle body side frame easily affects the characteristics exhibited by the stabilizer or the suspension characteristics.
[0004]
To alleviate this effect, it is possible to use a rod with a large diameter as a stabilizer, but such a solution may be contrary to demands for reducing the weight of the vehicle body.
[0005]
An object of the present invention is to provide a stabilizer mounting structure for a vehicle that can secure the mounting rigidity of the stabilizer while reducing the influence of vehicle body vibration.
[0006]
[Means for Solving the Problems]
According to the present invention, such a technical problem is
A subframe attached to the vehicle body and supporting the suspension mechanism;
A center portion extending in the vehicle width direction and disposed in front of the sub-frame, and a stabilizer having end portions extending rearward from both ends of the center portion;
The sub-frame is connected to the vehicle body by extending left and right side members supporting the lower arm of the suspension mechanism, a cross member extending in the vehicle width direction and connecting the left and right side members, and extending upward from each side member. A vertical member,
The vertical member has a stabilizer mounting portion for fixing an end of a central portion of the stabilizer,
An end portion of the stabilizer is connected to the lower arm via a control link ;
The vertical member has, at its upper end, a mounting portion protruding in the front-rear direction that can be connected to the vehicle body,
The mounting portion includes a front end wall, a rear end wall, and two partition walls arranged with a space therebetween,
A front end wall of the mounting portion and a partition wall adjacent thereto support the front base end of the upper arm of the suspension mechanism so as to be swingable in the vertical direction,
The rear end wall of the mounting portion and the partition wall adjacent thereto support the rear base end of the upper arm of the suspension mechanism so as to be swingable in the vertical direction,
This is achieved by providing a stabilizer mounting structure for a vehicle , wherein the stabilizer mounting portion is provided on the front end wall of the mounting portion .
[0007]
That is, according to the present invention, the stabilizer is fixed to the sub-frame that is a strength member for supporting the suspension mechanism, and the upper end of the vertical member that fixes the stabilizer is connected to the vehicle body. The support rigidity of the stabilizer can be secured while reducing.
[0009]
In addition, according to the present invention, the mounting portion of the subframe serves as both the support portion of the upper arm of the suspension mechanism and the mounting portion of the stabilizer, so that not only the number of parts can be reduced but also rigidity is required. Since the stabilizer is fixed using the upper arm support portion, it is easy to secure the mounting rigidity of the stabilizer.
[0010]
In a preferred embodiment of the present invention,
The mounting portion of the vertical member is formed by overlapping two first and second brackets having different sizes,
The relatively large first bracket has a shape that includes a ceiling wall, a bottom wall, a front end wall, a rear end wall, and a vehicle body inner wall, and is open toward the outside in the vehicle width direction.
The relatively small second bracket has a shape that includes a ceiling wall, a bottom wall, a front end wall, a rear end wall, and a vehicle body inner wall, and opens outward in the vehicle width direction.
The second bracket has the inner wall spaced from the inner wall of the first bracket, and the ceiling wall and the bottom wall are in contact with the ceiling wall and the bottom wall of the first bracket. It is arranged at the center part in the front-rear direction of the bracket,
A space sandwiched between the inner wall of the first bracket and the inner wall of the second bracket formed by the inner wall of the second bracket being spaced apart from the inner wall of the first bracket. The first bracket has two spacers that extend between the ceiling wall and the bottom wall and are spaced apart from each other, and the attachment portion is fixed to the vehicle body via a fastener that passes through the spacer. Is done.
[0011]
According to this preferred embodiment, the attachment portion is configured by overlapping the first and second box-shaped brackets with each other, and the two spacers extending vertically and the fastener passing through the spacer are provided. Therefore, the mounting rigidity of the mounting portion of the subframe with respect to the vehicle body can be sufficiently ensured, whereby the mounting rigidity of the stabilizer can be improved.
[0012]
In a preferred embodiment of the present invention, the stabilizer is fixed to a mounting portion located at the upper end of the vertical member via a bracket. The stabilizer mounting bracket may have a U-shaped cross section, and more preferably, a reinforcing plate is added and the reinforcing plate is attached to the mounting portion of the subframe.
[0013]
By doing so, not only the support rigidity of the stabilizer can be improved by the reinforcing plate, but also the rigidity of the mounting portion of the subframe can be improved by the reinforcing plate.
[0014]
According to a further preferred embodiment, the reinforcing plate is arranged to include a bolt insertion hole for inserting a bolt for attaching the front base end of the upper arm of the suspension mechanism to the attachment portion of the subframe. Is preferred.
[0015]
These and other objects and advantages of the present invention will become apparent from the following detailed description of the preferred embodiments of the present invention.
[0016]
【Example】
Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, a pair of members located on the left and right is denoted by a reference number that collectively refers to the pair of members, “L” is appended to the left member, and “R” is appended to the right member. is there.
[0017]
1 and 2 show a lower vehicle body structure in the front portion of the vehicle. In these drawings, reference numeral 1 indicates a pair of left and right front side frames. Between the left and right front side frames 1L and 1R, a shroud 2 extending in the vehicle width direction and a bumper reinforcement (see FIG. The front cross member 3 extending in the vehicle width direction is connected to an intermediate portion in the longitudinal direction, that is, the longitudinal direction of the vehicle body.
[0018]
A sub frame 4 is disposed below the front side frame 1, and a front suspension mechanism 5 is attached to the sub frame 4. The front suspension mechanism 5 is a double wishbone type suspension. In this embodiment, the front suspension mechanism 5 is provided with the A-shaped lower arm 6 and the A-shaped upper arm 7, but it may be of a multi-link type. Reference numeral 8 in FIG. 1 is a damper. The tips of the lower arm 6 and the upper arm 7 are connected to a knuckle 9, and the wheel 10 is detachably attached through the knuckle 9.
[0019]
The subframe 4 includes a pair of left and right side members 12 extending in the longitudinal direction of the vehicle body and a cross member 13 that connects the front ends of the side members 12 to each other, and the engine (see FIG. (Not shown) is installed.
[0020]
The subframe 4 further includes a vertical member 14 that is substantially rectangular in plan view and extends upward from the front end portion of each side member 12, and extends in the longitudinal direction of the vehicle body projecting forward and rearward of the vertical member 14 at the upper end of the vertical member 14. An extending attachment portion 15 is provided. As will be described later, two base ends of the A-shaped upper arm 7 are swingably attached to the attachment portion 15.
[0021]
Each mounting portion 15 has a front mounting hole 16 and a rear mounting hole 17 that are spaced apart in the front-rear direction on the upper surface thereof. Further, a positioning pin 19 is provided at the rear end of the side member 12 so as to protrude upward in the vertical direction. An optional transverse member 20 extending in the vehicle width direction is attached to the rear ends of the left and right side members 12 of the subframe 4.
[0022]
With reference to FIG. 2, the subframe 4 is attached to the front side frame 1 using the front mounting hole 16 and the rear mounting hole 17 in a state where the upper surface of the mounting portion 15 is in contact with the lower surface of each front side frame 1. It is bolted. Further, the rear end portion of the left and right side members 12 is bolted to the dash lower cross member 21, and the rear end portion of the transverse member 20 is bolted to the floor panel 22.
[0023]
When the subframe 4 is attached to the vehicle body, the subframe 4 is positioned using the front attachment hole 16 and the rear attachment hole 17 of the attachment portion 15 and the positioning pin 19 at the rear end of the side member 12.
[0024]
Two base ends of the A-shaped lower arm 6 of the suspension mechanism 5 are swingably attached to the side members 12 of the subframe 4 using bolts B (see FIG. 3).
[0025]
As best understood from FIG. 7, the vertical member 14 of the sub-frame 4 has a first member 24 having a U-shaped cross section that opens outward in the vehicle width direction, and preferably the width of the first member 24. The second member 25 is narrower than the first member 24. The second member 25 has a U-shaped cross section that is open toward the inside in the vehicle width direction, contrary to the first member 24. As can be seen from FIG. 6, the second member 25 may have a flange 25 a that extends outward in the vehicle width direction at the upper end thereof. By including the second member 25, the vertical member 14 can receive the second member 25 from the opening of the first member 24 and weld them to provide a closed cross-sectional structure.
[0026]
The attachment portion 15 located at the upper end of the vertical member 14 and projecting forward and rearward of the vertical member 14 is a first box-shaped member having two different rectangular sizes when viewed from the outside in the vehicle width direction. The second brackets 30 and 31 are joined together by welding, and the first member 24 of the vertical member 14 enters the mounting portion 15, and the upper end of the first bracket 30 will be described later. The side wall is welded to the bottom wall 34 of the first bracket and the vehicle body inner wall 37 which will be described later (see FIG. 4). Thus, by bringing the first member 24 into the mounting portion, the integrity of the vertical member 14 and the mounting portion 15 can be ensured.
[0027]
That is, the first bracket 30 that constitutes the attachment portion 15 and extends relatively in the longitudinal direction of the vehicle body has a ceiling wall 33, a bottom wall 34, a front end wall 35, a rear end wall 36, and a vehicle body inner wall 37. It opens toward the outside in the vehicle width direction. In the first bracket 30, the ceiling wall 33 may be made of a separate part. The second bracket 31 has a ceiling wall 40, a bottom wall 41, a front end wall 42, a rear end wall 43, and a vehicle body inner wall 44, and faces the vehicle width direction outward in the same manner as the first bracket 30. It is open.
[0028]
The upper end flange 25 a of the second member 25 of the vertical member 14 described above constitutes a part of the bottom wall 34 of the first bracket 30 (FIG. 6), and the upper end flange 25 a is formed on the bottom wall 41 of the second bracket 31. Welded. Thereby, the integrity of the vertical member 14 and the mounting portion 15 at the upper end thereof can be ensured.
The second bracket 31 is disposed at the center portion in the front-rear direction of the first bracket 30 with the ceiling wall 40 and the bottom wall 41 in contact with the ceiling wall 33 and the bottom wall 34 of the first bracket 30. In this relatively large box-shaped first bracket 30, two partition walls are constituted by a front end wall 42 and a rear end wall 43 of a relatively small box-shaped second bracket.
[0030]
That is, the front end wall 35 of the first bracket and the front end wall 42 of the second bracket, which is a partition wall adjacent to the first bracket, can be swung in the vertical direction by the bolt B with the front base end of the A-shaped upper arm 7 sandwiched therebetween. I support it. Further, the front end wall 36 of the first bracket and the rear end wall 43 of the second bracket, which is a partition wall adjacent to the front end wall 36, are swung up and down by the bolts B with the rear base end of the A-shaped upper arm 7 sandwiched therebetween. Supports movable. Thus, by supporting the upper arm 7 in a state where the two base ends of the upper arm 7 are sandwiched, the rotation of the upper arm 7 in the horizontal plane can be effectively suppressed.
[0031]
The second bracket 31 has a vehicle body inner wall 44 spaced from the vehicle body inner wall 37 of the first bracket 30 and extends in a vertical direction in a space sandwiched between the walls 44 and 37. Two spacers 45 and 46 are arranged (FIG. 6). The two spacers 45, 46 are spaced apart from each other in the longitudinal direction of the vehicle body, and each spacer 45, 46 extends between the ceiling wall 33 and the bottom wall 34 of the first bracket 30.
[0032]
The front spacer 45 is disposed so as to coincide with the front mounting hole 16 described above, and the rear spacer 46 is disposed so as to correspond to the rear mounting hole 17 described above. Correspondingly, through holes 47 and 48 are formed in the bottom wall 34 of the first bracket 30 so as to coincide with the front spacer 45 and the rear spacer 46 (FIGS. 6 and 8).
[0033]
The above-described support structure of the upper arm 7 by the mounting portion 15 at the upper end of the vertical member 14 can be applied to a subframe disposed at the rear of the vehicle body.
[0034]
Referring to FIG. 8, the sub frame 4 is fixed to the vehicle body, that is, the front side frame 1 by using bolts 49 that pass vertically through the attachment portion 15 at the upper end of the vertical member 14. That is, the bolt 49 is disposed through the spacers 45, 46, but both the front spacer 45 and the rear spacer 46 have a diameter larger than the diameter of the bolt 49, and the space between the spacers 45, 46 and the bolt 49 is large. A gap should be provided.
[0035]
Preferably, the rear spacer 46 is constituted by a small-diameter portion 46 a having an upper end portion having a certain length, and the diameter of the small-diameter portion 46 a has a reference diameter substantially the same as that of the bolt 49. Is good.
[0036]
According to this, as described above, when the attachment portion 15 of the sub-frame 4 is attached to the front side frame 1, the rear attachment hole 17, that is, the small diameter portion 46 a of the rear spacer 46 can be substantially positioned. As a result, when the suspension mechanism 5 is attached, it is possible to prevent the attachment from being deteriorated due to the movement in the left and right rotational directions.
[0037]
Further, when the subframe 4 is attached to the vehicle body, positioning can be performed using the front mounting hole 16, the rear mounting hole 17, and the positioning pin 19 behind the front mounting hole 16, but the positioning hole on the vehicle body side that receives the positioning pin 19 is used. By forming a diameter (not shown) somewhat larger than the positioning pin 19, the rear mounting hole 17 located at the center of these three members, that is, the small diameter portion 46a of the rear spacer 46 is used for substantial positioning. This makes it easier to absorb manufacturing errors.
[0038]
3 and 4, reference numeral 50 denotes a stabilizer, and the stabilizer 50 is disposed in front of the subframe 4. More specifically, the stabilizer 50 is disposed in front of the attachment portion 15 of the subframe 4.
[0039]
This point will be described in detail. The stabilizer 50 has a central portion 51 extending in the vehicle width direction and a pair of left and right end portions 52 extending rearward from each end of the central portion 51.
[0040]
The end of the stabilizer 50 is connected to an A-shaped lower arm 6 positioned below the stabilizer 50 via a control link 55, and the control link 55 extends in the vertical direction (FIG. 3). That is, the control link 55 has a lower end connected to the A-shaped lower arm 6 and an upper end connected to the end of the stabilizer 50.
[0041]
Each end of the central portion 51 of the stabilizer 50 is fixed to the front portion of the attachment portion 15 of the subframe 4 via a bracket 56. As best understood from FIG. 4, the stabilizer bracket 56 has a U-shaped cross section, a mounting base portion 56 a that is wide in the vehicle width direction and faces the stabilizer 50, and the mounting base portion. 56a has an outer leg portion 56b extending rearward from the outer end in the vehicle width direction and an inner leg portion 56c extending rearward from the inner end in the vehicle width direction of the mounting base portion 56a. The stabilizer 50 is provided on the mounting base portion 56a. It is fixed.
[0042]
The bracket 56 may have a reinforcing plate 58. The reinforcing plate 58 includes a first portion 58a extending along the front surface of the mounting portion 15 (the front end wall 35 of the first bracket 30), and a vehicle body inner surface ( It is preferable to include a second portion 58b extending along the vehicle body inner wall 37) of the first bracket 30. Such a reinforcing plate 58 is preferably joined to the mounting portion 15, that is, the first bracket 30 by welding. Of course, the reinforcing plate 58 may be omitted.
[0043]
Most preferably, the reinforcing plate 58 has a size such that the first portion 58a covers the periphery of the bolt hole for attaching the upper arm 7 of the suspension mechanism, and the seat of the bolt B is supported by the first portion 58a. It is preferable to configure. The ends of the leg portions 56b and 56c of the bracket 56 are connected to the reinforcing plate 58 by welding.
[0044]
In the above embodiment, the sub-frame 4 is attached to the sub-frame 4 that is a strength member to which the suspension mechanism (the A-shaped lower arm 6 and the upper arm 7) is attached. It is easy to ensure sufficient support rigidity, and no inadvertent vibration is given to the stabilizer 50.
[0045]
By securing such mounting rigidity and support rigidity, it is easy to exert the original function of the stabilizer 50. Therefore, an unnecessarily thick rod is selected as the stabilizer 50 in order to obtain sufficient vehicle body roll rigidity. There is no need.
[0046]
Further, since the reinforcing plate 58 is added to the stabilizer bracket 56 and this reinforcing plate 58 is attached to a part of the subframe 4, the mounting rigidity of the stabilizer bracket 56 can be improved by the reinforcing plate 58. In addition, the rigidity of the subframe 4 can be improved.
[0047]
More specifically, the reinforcing plate 58 has a shape extending along the front surface of the upper side member 5 and the inner surface of the vehicle body, and a first portion 58a extending along the front surface is a bolt B for fastening the suspension mechanism. Therefore, not only can the rigidity of the subframe 4 be increased, but also the mounting rigidity of the suspension mechanism can be improved.
[Brief description of the drawings]
FIG. 1 is a plan view showing an outline of a lower body structure related to an embodiment.
FIG. 2 is a side view showing an outline of a lower body structure related to an embodiment.
FIG. 3 is a side view of a subframe and a stabilizer provided at the front of the vehicle body as viewed from the side.
FIG. 4 is a partial perspective view of a part of a subframe and a stabilizer provided in the front part of the vehicle body as viewed from the front.
FIG. 5 is a side view of a vertical member of a subframe and a mounting portion at an upper end thereof.
FIG. 6 is a partial perspective view showing an enlarged attachment portion of a subframe.
7 is a cross-sectional view taken along the line VII-VII in FIG. 5 for explaining the closed cross-sectional structure of the vertical member.
FIG. 8 is a cross-sectional view for explaining a state in which the attachment portion is fixed to the vehicle body using front and rear spacers provided at the attachment portion at the upper end of the vertical member and bolts extending therethrough.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Sub-frame 5 Front suspension mechanism 6 Lower arm 7 Upper arm 14 Vertical member 15 Mounting part 30 1st bracket 31 2nd bracket 45 Front spacer 46 Back spacer 50 Stabilizer 56 Stabilizer bracket 58 Reinforcement plate

Claims (2)

A subframe attached to the vehicle body and supporting the suspension mechanism;
A center portion extending in the vehicle width direction and disposed in front of the sub-frame, and a stabilizer having end portions extending rearward from both ends of the center portion;
The sub-frame is connected to the vehicle body by extending left and right side members supporting the lower arm of the suspension mechanism, a cross member extending in the vehicle width direction and connecting the left and right side members, and extending upward from each side member. A vertical member,
The vertical member has a stabilizer mounting portion for fixing an end of a central portion of the stabilizer,
An end portion of the stabilizer is connected to the lower arm via a control link ;
The vertical member has, at its upper end, a mounting portion protruding in the front-rear direction that can be connected to the vehicle body,
The mounting portion includes a front end wall, a rear end wall, and two partition walls arranged with a space therebetween,
A front end wall of the mounting portion and a partition wall adjacent thereto support the front base end of the upper arm of the suspension mechanism so as to be swingable in the vertical direction,
The rear end wall of the mounting portion and the partition wall adjacent thereto support the rear base end of the upper arm of the suspension mechanism so as to be swingable in the vertical direction,
A stabilizer mounting structure for a vehicle , wherein the stabilizer mounting portion is provided on a front end wall of the mounting portion . The mounting portion is formed by overlapping two first and second brackets having different sizes,
The relatively large first bracket includes a ceiling wall, a bottom wall, a front end wall, a rear end wall, and a vehicle body inner wall, and has a shape that opens outward in the vehicle width direction,
The relatively small second bracket includes a ceiling wall, a bottom wall, a front end wall, a rear end wall, and a vehicle body inner wall, and has a shape that opens outward in the vehicle width direction,
The second bracket is in a state in which the inner wall is spaced from the inner wall of the first bracket and the ceiling wall and the bottom wall are in contact with the ceiling wall and the bottom wall of the first bracket, It is arranged in the center part in the front-rear direction of the first bracket,
The inner wall of the second bracket is sandwiched between the inner wall of the first bracket and the inner wall of the second bracket formed by being positioned away from the inner wall of the first bracket. In the space, two spacers are provided that extend between the ceiling wall and the bottom wall of the first bracket and are separated from each other in the front-rear direction, and the attachment portion is interposed via a fastener that passes through the spacer. is fixed to the vehicle body, the stabilizer mounting structure for a vehicle according to claim 1.

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