Suspension member structure

Abstract

The objective is to obtain a suspension member structure that can suppress vibration of a rigid member while ensuring its rigidity. [Solution] The suspension member structure comprises a suspension member 12 and a rigid member 58 which is formed in a plate shape and attached to the suspension member 12 to stiffen the suspension member 12. The rigid member 58 has ribs 62 formed on it to suppress deformation in the thickness direction of the rigid member 58, and in parts of the rigid member 58 different from the parts on which the ribs 62 are formed, there are openings (first opening 68, second opening 70) that penetrate the rigid member 58.

Description

【Technical Field】 【0001】 The present invention relates to a suspension member structure. 【Background Art】 【0002】 Patent Document 1 below discloses a vehicle rear structure including motors that independently drive the left and right rear wheels. The rear portion of the vehicle described in this document includes a pair of left and right rear side frames extending in the vehicle front-rear direction, a pair of left and right motors that independently drive the left and right rear wheels, a motor mounting member for mounting the pair of left and right motors to the vehicle body, and a cross member extending in the vehicle width direction behind the pair of left and right motors. The rear portion of the motor mounting member is connected to the cross member, and the front portion thereof is connected to the pair of left and right rear side frames. Thereby, the pair of left and right motors are mounted to the vehicle body via the motor mounting member. 【Prior Art Documents】 【Patent Documents】 【0003】 【Patent Document 1】 Japanese Unexamined Patent Application Publication No. 2012-041009 【Summary of the Invention】 【Problems to be Solved by the Invention】 【0004】 By the way, in a vehicle provided with a suspension member to which an arm or the like for supporting a wheel is attached, in order to increase the rigidity of the suspension member, it is conceivable to attach a rigid member formed in a plate shape to the suspension member. In this case, it is desirable to be able to suppress vibration of the rigid member while ensuring the rigidity of the rigid member. 【0005】 In consideration of the above facts, an object of the present invention is to obtain a suspension member structure capable of suppressing vibration of a rigid member while ensuring the rigidity of the rigid member. 【Means for Solving the Problems】 【0006】 The suspension member structure of the first embodiment comprises a suspension member and a rigid member formed in the shape of a plate and attached to the suspension member to stiffen the suspension member, wherein the rigid member has ribs formed thereon that suppress deformation in the thickness direction of the rigid member, and an opening is formed in the rigid member in a portion of the rigid member different from the portion where the ribs are formed, and the rigid member penetrates the rigid member. 【0007】 In the suspension member structure of the first embodiment, the rigidity of the suspension member is increased by attaching a rigid member to the suspension member. Here, the rigid member has ribs formed on it to suppress deformation in the thickness direction of the rigid member. This ensures the rigidity of the rigid member. In addition, an opening is formed in the rigid member in a part of the rigid member that is different from the part where the ribs are formed, and the opening penetrates the rigid member. In this configuration, air around the rigid member can pass through the opening from one side to the other in the thickness direction of the rigid member. This suppresses vibration of the rigid member due to wind pressure. 【0008】 The suspension member structure of the second embodiment is the suspension member structure of the first embodiment, wherein the rib is formed along the edge of the opening. 【0009】 In the suspension member structure of the second embodiment, the ribs are formed along the edge of the opening, thereby suppressing the reduction in the rigidity of the rigid member caused by forming the opening. 【0010】 The third embodiment of the suspension member structure is the suspension member structure of the first embodiment or the second embodiment, wherein, when viewed from the thickness direction, the rigid member is formed in a rectangular shape, and the ribs are formed along the diagonals of the rigid member. 【0011】 In the third embodiment of the suspension member structure, the ribs are formed along the diagonals of the rectangular rigid member. This configuration makes it easier to ensure the rigidity of the rigid member compared to a configuration in which the ribs are not formed along the diagonals of the rectangular rigid member. 【0012】 The fourth embodiment of the suspension member structure is a suspension member structure of any one of the first to third embodiments, wherein the opening is a relief portion that avoids interference with a member supported by the suspension member. 【0013】 In the fourth embodiment of the suspension member structure, since the opening is formed in the rigid member, interference between the member supported by the suspension member and the rigid member can be avoided. [Effects of the Invention] 【0014】 The suspension member structure according to the present invention has the excellent effect of being able to suppress vibration of a rigid member while ensuring the rigidity of the rigid member. [Brief explanation of the drawing] 【0015】 [Figure 1] This is a plan view showing suspension members, etc. [Figure 2] This is a side view showing the suspension members, etc. [Figure 3] A plan view showing a rigid member. [Modes for carrying out the invention] 【0016】 The rear section 10 of a vehicle to which the suspension member structure according to an embodiment of the present invention is applied will be described using Figures 1 to 3. Arrows FR shown as appropriate in each figure indicate the front side of the vehicle, arrows UP indicate the upper side of the vehicle, arrows LH indicate the left side in the vehicle width direction (left-right direction), and arrows RH indicate the right side in the vehicle width direction (left-right direction). Furthermore, in the following description, unless otherwise specified, when the front-rear, up-down, and left-right directions are indicated, they refer to the front-rear direction of the vehicle, the up-down direction of the vehicle, and the left-right direction of the vehicle. 【0017】 As shown in Figures 1 and 2, a suspension member 12 is provided at the rear 10 of a vehicle to which the suspension member structure of this embodiment is applied. Various arms and the like that which support the left and right rear wheels (not shown) are attached to this suspension member 12. Note that in Figures 1 and 2, the parts of the suspension member 12 to which the various arms and the like are attached are omitted. A motor 14 for driving the left and right rear wheels is supported on the suspension member 12 via a motor mount 16. A rigid member 58 is also attached to the suspension member 12. 【0018】 The suspension member 12 is formed, for example, from aluminum die-casting, and has a configuration in which the parts described later are integrally formed. This suspension member 12 includes a pair of left and right side member portions 18 that extend in the front-rear direction on both sides in the vehicle width direction, and a front cross member portion 20 that connects the front ends of the pair of left and right side member portions 18 in the left-right direction. The suspension member 12 also includes a rear cross member portion 22 that connects the rear ends of the pair of left and right side member portions 18 in the left-right direction, and an intermediate cross member portion 24 that connects the middle portions of the pair of left and right side member portions 18 in the front-rear direction in the left-right direction. 【0019】 As shown in FIG. 1, the shape of the range from the central portion in the front-rear direction to the front end portion of the pair of left and right side member portions 18 when viewed from above is a shape that gently curves outward in the vehicle width direction as it goes toward the front side. As shown in FIG. 2, the intermediate portion in the front-rear direction of the pair of left and right side member portions 18 includes an upper intermediate member portion 26 extending in the front-rear direction and a lower intermediate member portion 28 extending in the front-rear direction below the upper intermediate member portion 26. An opening 30 through which a drive shaft for transmitting the rotation of the motor 14 to the rear wheels can pass in the left-right direction is formed between the upper intermediate member portion 26 and the lower intermediate member portion 28. 【0020】 As shown in FIGS. 1 and 2, a front fixing portion 32 fixed to a vehicle body (not shown) is provided at the front end portion of the pair of left and right side member portions 18. A mount member mounting hole 34 to which a mount member (not shown) is attached by press-fitting or the like is formed in the front fixing portion 32. Then, by fixing the mount member attached to the mount member mounting hole 34 to the vehicle body, the front fixing portion 32 is fixed to the vehicle body. 【0021】 A rear fixing portion 36 fixed to a vehicle body (not shown) is provided on the rear end side of the pair of left and right side member portions 18. A mount member mounting hole 38 to which a mount member (not shown) is attached by press-fitting or the like is formed in the rear fixing portion 36. Then, by fixing the mount member attached to the mount member mounting hole 38 to the vehicle body, the rear fixing portion 36 is fixed to the vehicle body. 【0022】 As shown in FIG. 1, the shape of the front cross member portion 20 when viewed from above is a shape that gently curves rearward as it goes toward the central portion in the vehicle width direction. The front cross member portion 20 is spanned between the front fixing portions 32 of the pair of left and right side member portions 18. Further, the rear cross member portion 22 is spanned between the rear fixing portions 36 of the pair of left and right side member portions 18. Furthermore, as shown in FIGS. 1 and 2, the intermediate cross member portion 24 is spanned between the rear end portions of the lower intermediate member portions 28 of the pair of left and right side member portions 18. 【0023】 As shown in FIG. 2, at the rear end side of the upper intermediate member portion 26 of the pair of left and right side member portions 18, a motor mount mounting hole 40 as a mounting hole penetrating in the vehicle width direction is formed. A bush 42 that forms a part of the motor mount 16 is press-fitted and attached to the motor mount mounting hole 40 from the outside in the vehicle width direction. A motor mount main body that forms another part of the motor mount 16 is fixed to the bush 42. And the motor 14 disposed between the pair of left and right side member portions 18 is supported by the suspension member 12 via the motor mount main body and the bush 42. [[ID=​​​​​​​​​The rigid member body 60 has a first opening 68 and a second opening 70, both formed in a rectangular shape with the left-right direction as the longitudinal direction. The first opening 68 is formed to penetrate the rigid member body 60 at the center of the rigid member body 60 in both the left-right and front-back directions. The second opening 70 is formed to penetrate the rigid member body 60 on the right rear side relative to the first opening 68. 【0027】 As shown in Figure 3, the rib 62 is configured to protrude downward from the rigid member body 60 and has the function of ensuring the bending rigidity and torsional rigidity of the rigid member body 60. The rib 62 includes a first rib portion 72 that extends in the left-right direction from the central part in the front-rear direction of the rigid member body 60. This first rib portion 72 is formed along the rear edge of the first opening 68 and the front edge of the second opening 70. The rib 62 also includes a pair of left and right second rib portions 74 that extend to the right front and left front sides, respectively, from the central part of the first rib portion 72 in the left-right direction. Furthermore, the rib 62 includes a pair of left and right third rib portions 76 that extend to the right rear and left rear sides, respectively, from the end parts in the left-right direction of the first rib portion 72. The rib 62 also includes a pair of left and right fourth rib portions 78 that extend to the right rear and left rear sides, respectively, from the longitudinal middle part of the pair of left and right second ribs 62. The right fourth rib section 78 is connected to the right end of the first rib section 72 and the longitudinal center of the third rib section 76. Furthermore, the end of the right fourth rib section 78 opposite to the right second rib section 74 protrudes rearward relative to the right third rib section 76. The left fourth rib section 78 is connected to the left end of the first rib section 72 and the longitudinal center of the third rib section 76. Furthermore, the end of the left fourth rib section 78 opposite to the left second rib section 74 protrudes rearward relative to the left third rib section 76. 【0028】 When viewing the rigid member body 60 from the thickness direction (in this case, from above), the range from the second rib portion 74 on the right side, through the midpoint of the first rib portion 72 in the left-right direction, to the third rib portion 76 on the left side, is substantially aligned with the diagonal line drawn from the right front end to the left rear end of the rigid member body 60. Similarly, the range from the second rib portion 74 on the left side, through the midpoint of the first rib portion 72 in the left-right direction, to the third rib portion 76 on the right side, is substantially aligned with the diagonal line drawn from the left front end to the right rear end of the rigid member body 60. 【0029】 As shown in Figures 1, 2, and 3, in the embodiment described above, the rigidity of the suspension member 12 is increased by attaching the rigid member 58 to the suspension member 12. Here, the rigid member body 60 has ribs 62 formed on it to suppress deformation in the thickness direction of the rigid member body 60. This ensures the rigidity of the rigid member 58. In addition, a first opening 68 and a second opening 70 are formed in the rigid member body 60 in a part different from the part where the ribs 62 are formed, and these openings penetrate the rigid member body 60. In this configuration, air around the rigid member can be passed through the first opening 68 and the second opening 70 from one side to the other in the thickness direction of the rigid member body 60. This suppresses vibration of the rigid member 58 (rigid member body 60) due to wind pressure. 【0030】 Furthermore, in this embodiment, the first rib portion 72, which constitutes a part of the rib 62, is formed along the rear edge of the first opening 68 and the front edge of the second opening 70. This makes it possible to suppress the reduction in rigidity of the rigid member 58 (rigid member main body portion 60) caused by forming the first opening 68 and the second opening 70. 【0031】 Furthermore, in this embodiment, when viewing the rigid member body 60 from above, the range from the second rib portion 74 on the right side, through the midpoint of the first rib portion 72 in the left-right direction, to the third rib portion 76 on the left side, substantially aligns with the diagonal line drawn from the right front end to the left rear end of the rigid member body 60. In addition, the range from the second rib portion 74 on the left side, through the midpoint of the first rib portion 72 in the left-right direction, to the third rib portion 76 on the right side, substantially aligns with the diagonal line drawn from the left front end to the right rear end of the rigid member body 60. With this configuration, it is easier to ensure the rigidity of the rigid member 58 compared to a configuration in which the above ranges in the rib 62 do not align with the diagonal. 【0032】 Furthermore, in this embodiment, the first opening 68 and the second opening 70 formed in the rigid member body 60 can also function as clearance portions to avoid interference with members supported by the suspension member 12 (for example, a part of the motor 14 or a wiring connector). In this configuration, interference between members supported by the suspension member 12 and the rigid member 58 can be avoided. 【0033】 In this embodiment, an example was described in which the above range of the rib 62 is aligned diagonally, but the present invention is not limited to this. Whether or not the above range of the rib 62 is aligned diagonally can be appropriately determined considering the rigidity required of the rigid member 58. 【0034】 Furthermore, although this embodiment describes an example in which the first rib portion 72, which constitutes a part of the rib 62, is formed along the rear edge of the first opening 68 and the front edge of the second opening 70, the present invention is not limited thereto. Whether or not to form the rib 62 along the edges of the first opening 68 and the second opening 70 can be appropriately determined by considering the degree to which the formation of the first opening 68 and the second opening 70 affects the rigidity of the rigid member body portion 60. 【0035】 Although one embodiment of the present invention has been described above, it goes without saying that the present invention is not limited to the above, and can be implemented in various other ways without departing from the spirit of the invention. [Explanation of symbols] 【0036】 12 Suspension Member 58 Rigid members 62 Ribs 68 First opening (opening) 70 Second opening (opening)

Claims

[Claim 1] Suspension member and, A rigid member formed in a plate shape and attached to the suspension member, which stiffens the suspension member, Equipped with, The rigid member is provided with ribs that suppress deformation in the thickness direction of the rigid member. A suspension member structure in which an opening is formed through the rigid member in a portion of the rigid member different from the portion where the rib is formed. [Claim 2] The suspension member structure according to claim 1, wherein the rib is formed along the edge of the opening. [Claim 3] When viewed from the thickness direction, the rigid member is formed in a rectangular shape. The suspension member structure according to claim 1, wherein the ribs are formed along the diagonals of the rigid member. [Claim 4] The suspension member structure according to claim 1, wherein the opening is a clearance portion that avoids interference with a member supported by the suspension member.

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