JP2021167159A - Supporting structure of on-vehicle component - Google Patents

Supporting structure of on-vehicle component Download PDF

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JP2021167159A
JP2021167159A JP2020071574A JP2020071574A JP2021167159A JP 2021167159 A JP2021167159 A JP 2021167159A JP 2020071574 A JP2020071574 A JP 2020071574A JP 2020071574 A JP2020071574 A JP 2020071574A JP 2021167159 A JP2021167159 A JP 2021167159A
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vehicle
frame member
support
fixing
separation
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智之 鶴田
Tomoyuki Tsuruta
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Hino Motors Ltd
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Hino Motors Ltd
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Abstract

To provide a supporting structure of on-vehicle component, capable of suppressing reduction in an allowance against a fatigue limit in stress generated at a fixing member.SOLUTION: In a supporting structure 100 of an on-vehicle component, a support bracket 10 includes a pair of fixing members 11 installed on a side face of the frame member side by side and a support plate 12 bridged across the fixing member 11 to support the on-vehicle component. The fixing member 11 includes a fixing part 13 fixed on a side face of the frame member and an extension part 14 extending from the fixing part 13 in such a direction as to depart from the frame member and supports the support frame 12. The fixing part 13 is fixed on the side face of the frame member at fastening positions P2, P5 at which a fastener 6 is arranged. A percentage obtained by dividing a first spacing degree B which is the largest one of spacing degrees from a position P1 of a virtual load point at which a support load of the on-vehicle component works on a support plate 12 to the fastening positions P2, P5 by a second spacing degree A which is the smallest one of the spacing degrees is 3.5 or less.SELECTED DRAWING: Figure 3

Description

本発明は、車両搭載品の支持構造に関する。 The present invention relates to a support structure for a vehicle-mounted product.

従来、車両のフレーム部材の側面に固定され、車両搭載品を支持する支持ブラケットを備える車両搭載品の支持構造として、例えば特許文献１に記載のものが知られている。特許文献１に記載の支持ブラケットは、フレーム部材の側面に並設される一対の固定部材と、固定部材に架け渡されて車両搭載品を支持する支持プレートと、を備えている。固定部材は、フレーム部材の側面に固定される固定部と、フレーム部材から離れる方向に固定部から延びて支持プレートを支持する延在部と、を有している。固定部は、複数の締結具のそれぞれが配置される複数の締結位置においてフレーム部材の側面に固定されている。 Conventionally, as a support structure for a vehicle-mounted product, which is fixed to a side surface of a frame member of the vehicle and includes a support bracket for supporting the vehicle-mounted product, for example, the one described in Patent Document 1 is known. The support bracket described in Patent Document 1 includes a pair of fixing members juxtaposed on the side surface of the frame member, and a support plate that is bridged over the fixing members to support the vehicle-mounted product. The fixing member has a fixing portion fixed to the side surface of the frame member and an extending portion extending from the fixing portion in a direction away from the frame member to support the support plate. The fixing portion is fixed to the side surface of the frame member at a plurality of fastening positions where each of the plurality of fasteners is arranged.

特開２０１８−１７２０２６号公報Japanese Unexamined Patent Publication No. 2018-172026

上述の支持ブラケットでは、車両搭載品の支持荷重が支持プレートから固定部材を介して複数の締結位置のそれぞれに分散される。しかしながら、分散される荷重は、支持プレートの位置に対する締結位置に応じて偏る場合がある。この場合、大きく偏った荷重が掛かる締結位置においては、荷重に応じて大きな応力が生じることから、固定部材に生じる応力についての疲労限度に対する余裕が小さくなるおそれがある。 In the above-mentioned support bracket, the support load of the vehicle-mounted product is distributed from the support plate to each of the plurality of fastening positions via the fixing member. However, the distributed load may be biased depending on the fastening position with respect to the position of the support plate. In this case, at the fastening position where a large biased load is applied, a large stress is generated according to the load, so that there is a possibility that the margin for the fatigue limit for the stress generated in the fixing member becomes small.

本発明は、固定部材に生じる応力についての疲労限度に対する余裕が小さくなることを抑制することが可能となる車両搭載品の支持構造を提供することを目的とする。 An object of the present invention is to provide a support structure for a vehicle-mounted product, which can suppress a decrease in the margin for a fatigue limit for stress generated in a fixing member.

本発明の一態様に係る車両搭載品の支持構造は、車両のフレーム部材の側面に固定される支持ブラケットを用いて車両搭載品を支持する車両搭載品の支持構造であって、支持ブラケットは、フレーム部材の側面に並設される複数の固定部材と、固定部材に架け渡されて車両搭載品を支持する支持プレートと、を備え、固定部材は、フレーム部材の側面に固定される固定部と、フレーム部材から離れる方向に固定部から延びて支持プレートを支持する延在部と、を有し、固定部は、複数の締結具のそれぞれが配置される複数の締結位置においてフレーム部材の側面に固定されており、車両搭載品の支持荷重が支持プレートに作用する仮想的な荷重点の位置から締結位置までの距離に基づく離間度のうち最大の離間度である第１離間度を、離間度のうち最小の離間度である第２離間度で除した比率が、３．５以下である。 The support structure of the vehicle-mounted product according to one aspect of the present invention is a support structure of the vehicle-mounted product that supports the vehicle-mounted product by using a support bracket fixed to the side surface of the frame member of the vehicle. A plurality of fixing members arranged side by side on the side surface of the frame member and a support plate that is bridged over the fixing member to support the vehicle-mounted product are provided, and the fixing member is a fixing portion fixed to the side surface of the frame member. The fixing portion has an extending portion extending from the fixing portion in a direction away from the frame member to support the support plate, and the fixing portion is provided on the side surface of the frame member at a plurality of fastening positions where each of the plurality of fasteners is arranged. The first degree of separation, which is the maximum degree of separation based on the distance from the position of the virtual load point where the support load of the vehicle-mounted product acts on the support plate to the fastening position, is fixed. The ratio divided by the second degree of separation, which is the minimum degree of separation, is 3.5 or less.

本発明の一態様に係る車両搭載品の支持構造では、第１離間度を第２離間度で除した比率が３．５以下とされている。この比率は、離間度が第１離間度である締結位置に掛かる荷重に対して、離間度が第２離間度である締結位置に掛かる荷重がどの程度大きいかに対応する。そのため、比率が３．５を超える場合と比較して、離間度が第２離間度である締結位置に分散される車両搭載品の支持荷重を抑えることができる。したがって、固定部材に生じる応力についての疲労限度に対する余裕が小さくなることを抑制することが可能となる。 In the support structure of the vehicle-mounted product according to one aspect of the present invention, the ratio of the first degree of separation divided by the second degree of separation is 3.5 or less. This ratio corresponds to how large the load applied to the fastening position where the degree of separation is the second degree of separation is larger than the load applied to the fastening position where the degree of separation is the first degree of separation. Therefore, as compared with the case where the ratio exceeds 3.5, the supporting load of the vehicle-mounted product dispersed in the fastening position where the degree of separation is the second degree of separation can be suppressed. Therefore, it is possible to prevent the margin for the fatigue limit of the stress generated in the fixing member from becoming small.

一実施形態において、支持プレートは、延在部における車両上下方向の上側で支持されており、固定部は、固定部材のフレーム部材側において車両上下方向の上側に設けられると共に少なくとも１つの締結位置においてフレーム部材の側面に固定される上固定部と、固定部材のフレーム部材側において車両上下方向の下側に設けられると共に少なくとも１つの締結位置においてフレーム部材の側面に固定される下固定部と、を含み、上固定部は、車両前後方向において互いに離れるように固定部材のフレーム部材側の端部から延びており、下固定部は、車両前後方向において互いに近付くように固定部材のフレーム部材側の端部から延びていてもよい。この場合、下固定部よりも支持プレートに近い上固定部が、車両前後方向において互いに離れるように延びていることから、車両前後方向において互いに近付くように上固定部を構成する場合と比べて、支持プレートから上固定部の締結位置までの距離を長くすることができる。よって、この構成によれば、第１離間度を第２離間度で除した比率を３．５以下とすることの容易化を図ることができる。 In one embodiment, the support plate is supported on the upper side of the extending portion in the vertical direction of the vehicle, and the fixing portion is provided on the upper side of the frame member side of the fixing member in the vertical direction of the vehicle and at at least one fastening position. An upper fixing portion fixed to the side surface of the frame member and a lower fixing portion provided on the lower side in the vehicle vertical direction on the frame member side of the fixing member and fixed to the side surface of the frame member at at least one fastening position. Including, the upper fixing portion extends from the end of the fixing member on the frame member side so as to be separated from each other in the vehicle front-rear direction, and the lower fixing portion extends from the end of the fixing member on the frame member side so as to approach each other in the vehicle front-rear direction. It may extend from the part. In this case, since the upper fixing portion closer to the support plate than the lower fixing portion extends so as to be separated from each other in the vehicle front-rear direction, the upper fixing portion is configured so as to approach each other in the vehicle front-rear direction. The distance from the support plate to the fastening position of the upper fixing portion can be increased. Therefore, according to this configuration, it is possible to facilitate the ratio of the first degree of separation divided by the second degree of separation to be 3.5 or less.

本発明によれば、固定部材に生じる応力についての疲労限度に対する余裕が小さくなることを抑制することが可能となる。 According to the present invention, it is possible to prevent the margin for the fatigue limit of the stress generated in the fixing member from becoming small.

一実施形態の車両搭載品の支持構造の斜視図である。It is a perspective view of the support structure of the vehicle-mounted article of one Embodiment. 比較例の車両搭載品の支持構造の斜視図である。It is a perspective view of the support structure of the vehicle-mounted product of the comparative example. （ａ）は、図１の車両搭載品の支持構造における第１離間度及び第２離間度を示す正面図である。（ｂ）は、比較例の車両搭載品の支持構造における第１離間度及び第２離間度を示す正面図である。FIG. 1A is a front view showing a first degree of separation and a second degree of separation in the support structure of the vehicle-mounted product of FIG. (B) is a front view showing the first degree of separation and the second degree of separation in the support structure of the vehicle-mounted product of the comparative example.

以下、本発明の実施形態について、図面を参照して詳細に説明する。なお、図面において、同一又は同等の要素には同じ符号を付し、重複する説明を省略する。 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the drawings, the same or equivalent elements are designated by the same reference numerals, and duplicate description will be omitted.

図１は、一実施形態の車両搭載品の支持構造の斜視図である。図１に示されるように、車両搭載品の支持構造１００は、フレーム部材１に取り付けられる支持ブラケット１０を備えている。支持ブラケット１０は、車両搭載品２を吊り下げるためのブラケットである。車両搭載品２は、例えば排気浄化装置の触媒ケース及び燃料タンク等の重量物である。 FIG. 1 is a perspective view of a support structure of a vehicle-mounted product of one embodiment. As shown in FIG. 1, the support structure 100 of the vehicle-mounted product includes a support bracket 10 attached to the frame member 1. The support bracket 10 is a bracket for suspending the vehicle-mounted product 2. The vehicle-mounted product 2 is, for example, a heavy object such as a catalyst case and a fuel tank of an exhaust gas purification device.

フレーム部材１は、一例として、車両前後方向を長手方向として延びる長尺部材である。フレーム部材１は、例えばコの字断面（Ｃ字断面）に形成された鋼材である。フレーム部材１は、鉛直方向及び車両前後方向に沿って延びる側面１ａと、側面１ａの上下両端において車両左右方向（例えば内側）に向かって起立する上面１ｂ及び下面１ｃと、を有している。ここでは、側面１ａに支持ブラケット１０が固定されている。車両搭載品の支持構造１００では、フレーム部材１の車両左右方向外側において車両搭載品２が支持ブラケット１０を介して支持される。 As an example, the frame member 1 is a long member extending in the front-rear direction of the vehicle as a longitudinal direction. The frame member 1 is, for example, a steel material formed in a U-shaped cross section (C-shaped cross section). The frame member 1 has a side surface 1a extending in the vertical direction and the vehicle front-rear direction, and an upper surface 1b and a lower surface 1c standing up in the vehicle left-right direction (for example, inside) at both upper and lower ends of the side surface 1a. Here, the support bracket 10 is fixed to the side surface 1a. In the support structure 100 of the vehicle-mounted product, the vehicle-mounted product 2 is supported via the support bracket 10 on the outer side of the frame member 1 in the left-right direction of the vehicle.

支持ブラケット１０は、フレーム部材１の側面１ａに並設される一対の固定部材１１と、固定部材１１に架け渡されて車両搭載品２を支持する支持プレート１２と、を備えている。 The support bracket 10 includes a pair of fixing members 11 juxtaposed on the side surface 1a of the frame member 1 and a support plate 12 that is bridged over the fixing members 11 to support the vehicle-mounted product 2.

固定部材１１は、支持ブラケット１０をフレーム部材１に固定する部材である。固定部材１１は、例えば板状を呈しており、支持ブラケット１０における車両前後方向（フレーム部材１の延在方向）の両端部において、互いに対向するように一対配置されている。 The fixing member 11 is a member that fixes the support bracket 10 to the frame member 1. The fixing members 11 have a plate shape, for example, and are arranged in pairs so as to face each other at both ends of the support bracket 10 in the vehicle front-rear direction (extending direction of the frame member 1).

一対の固定部材１１のそれぞれは、フレーム部材１の側面１ａに固定される固定部１３と、フレーム部材１から離れる方向に固定部１３から延びる延在部１４と、を有している。固定部１３には、ボルト等の締結具６を挿通させる貫通孔がフレーム部材１の側面１ａに直交する向きに形成されている（図示省略）。 Each of the pair of fixing members 11 has a fixing portion 13 fixed to the side surface 1a of the frame member 1 and an extending portion 14 extending from the fixing portion 13 in a direction away from the frame member 1. A through hole through which a fastener 6 such as a bolt is inserted is formed in the fixing portion 13 in a direction orthogonal to the side surface 1a of the frame member 1 (not shown).

本実施形態の固定部１３は、固定部材１１のフレーム部材１側（後述の縦延部１４ａ）において車両上下方向の上側に設けられた上固定部１３ａと、固定部材１１のフレーム部材１側において車両上下方向の下側に設けられた下固定部１３ｂと、を含む。上固定部１３ａ及び下固定部１３ｂのそれぞれには、締結具６を挿通させる貫通孔が少なくとも１つ（ここでは１つずつ）形成されている。上固定部１３ａ及び下固定部１３ｂのそれぞれは、フレーム部材１の側面１ａに沿って配置された状態で、締結具６の位置を締結位置として当該締結位置においてフレーム部材１の側面に固定されている。 The fixing portion 13 of the present embodiment is provided on the upper fixing portion 13a provided on the upper side of the fixing member 11 on the frame member 1 side (vertical extension portion 14a described later) in the vertical direction of the vehicle and on the frame member 1 side of the fixing member 11. Includes a lower fixing portion 13b provided on the lower side in the vertical direction of the vehicle. Each of the upper fixing portion 13a and the lower fixing portion 13b is formed with at least one through hole (here, one through hole) through which the fastener 6 is inserted. Each of the upper fixing portion 13a and the lower fixing portion 13b is fixed to the side surface of the frame member 1 at the fastening position with the position of the fastener 6 as the fastening position in a state where each of the upper fixing portion 13a and the lower fixing portion 13b is arranged along the side surface 1a of the frame member 1. There is.

上固定部１３ａ及び下固定部１３ｂは、車両前後方向について互いに逆方向を向くように、縦延部１４ａから延びている。具体的には、上固定部１３ａは、車両前後方向において互いに離れるように固定部材１１のフレーム部材１側の端部から延びている。下固定部１３ｂは、車両前後方向において互いに近付くように固定部材１１のフレーム部材１側の端部から延びている。上固定部１３ａ及び下固定部１３ｂのそれぞれは、例えば、固定部材１１のフレーム部材１側の端部が互いに反対方向に略直角に屈曲されることで形成することができる。 The upper fixing portion 13a and the lower fixing portion 13b extend from the vertically extending portion 14a so as to face opposite directions with respect to the vehicle front-rear direction. Specifically, the upper fixing portion 13a extends from the end portion of the fixing member 11 on the frame member 1 side so as to be separated from each other in the vehicle front-rear direction. The lower fixing portion 13b extends from the end portion of the fixing member 11 on the frame member 1 side so as to approach each other in the front-rear direction of the vehicle. Each of the upper fixing portion 13a and the lower fixing portion 13b can be formed, for example, by bending the ends of the fixing member 11 on the frame member 1 side in opposite directions at substantially right angles.

延在部１４は、例えば、全体として車両前後方向視で略Ｌ字状をなしている。延在部１４は、固定部１３に沿って車両上下方向に沿って延びる縦延部１４ａと、縦延部１４ａの上端部からフレーム部材１から離れる向きに略水平方向（車両左右方向）に沿って延びる横延部１４ｂと、を有している。横延部１４ｂには、横延部１４ｂを車両前後方向に貫通する貫通孔１４ｃが設けられている。貫通孔１４ｃは、各固定部材１１について２個ずつ設けられている。貫通孔１４ｃは、後述する支持プレート１２の断面形状に対応する形状で開口しており、支持プレート１２が挿通可能とされている。 The extending portion 14 has, for example, a substantially L-shape as a whole when viewed in the front-rear direction of the vehicle. The extending portion 14 has a vertically extending portion 14a extending along the fixing portion 13 in the vertical direction of the vehicle and a substantially horizontal direction (vehicle left and right direction) in a direction away from the upper end portion of the vertically extending portion 14a and the frame member 1. It has a laterally extending portion 14b extending from the surface. The laterally extending portion 14b is provided with a through hole 14c that penetrates the laterally extending portion 14b in the front-rear direction of the vehicle. Two through holes 14c are provided for each fixing member 11. The through hole 14c is opened in a shape corresponding to the cross-sectional shape of the support plate 12 described later, and the support plate 12 can be inserted through the through hole 14c.

支持プレート１２は、車両搭載品２を支持する長尺の板状部材である。支持プレート１２は、その長手方向が車両前後方向に沿うように、一対の固定部材１１の延在部１４に架け渡されている。支持プレート１２は、その表面が水平方向に沿って延在するように、一対の固定部材１１の延在部１４に架け渡されている。支持プレート１２には、ボルト等の吊下具（図示省略）が挿通される支持穴１２ａが形成されている。支持プレート１２は、吊下具を介して車両搭載品２を支持プレート１２の下方に吊り下げて支持する。本実施形態では、支持穴１２ａの位置は、車両搭載品２の支持荷重が作用する荷重点の位置に相当する。 The support plate 12 is a long plate-shaped member that supports the vehicle-mounted product 2. The support plate 12 is bridged over the extending portion 14 of the pair of fixing members 11 so that the longitudinal direction thereof is along the vehicle front-rear direction. The support plate 12 is bridged over the extending portion 14 of the pair of fixing members 11 so that its surface extends along the horizontal direction. The support plate 12 is formed with a support hole 12a through which a hanging tool such as a bolt (not shown) is inserted. The support plate 12 suspends and supports the vehicle-mounted product 2 below the support plate 12 via a hanging tool. In the present embodiment, the position of the support hole 12a corresponds to the position of the load point on which the support load of the vehicle-mounted product 2 acts.

支持プレート１２は、一例として、延在部１４における車両上下方向の上側で支持されている。支持プレート１２における車両前後方向の両端部は、例えば、固定部材１１の貫通孔１４ｃに挿通されている。支持プレート１２は、貫通孔１４ｃの挿通位置において固定部材１１と支持プレート１２とが溶接されることで、固定部材１１に対して固定される。当該固定箇所を介して、車両搭載品２の支持荷重が支持プレート１２から固定部材１１に伝達される。 As an example, the support plate 12 is supported on the upper side of the extending portion 14 in the vertical direction of the vehicle. Both ends of the support plate 12 in the vehicle front-rear direction are inserted into, for example, through holes 14c of the fixing member 11. The support plate 12 is fixed to the fixing member 11 by welding the fixing member 11 and the support plate 12 at the insertion position of the through hole 14c. The supporting load of the vehicle-mounted product 2 is transmitted from the support plate 12 to the fixing member 11 through the fixing portion.

ここで、支持プレート１２に加わる車両搭載品２の荷重によって固定部１３に生じる応力について、図２及び図３を参照しつつ説明する。図２は、比較例の車両搭載品の支持構造の斜視図である。図３（ａ）は、図１の車両搭載品の支持構造における第１離間度及び第２離間度を示す正面図である。図３（ｂ）は、比較例の車両搭載品の支持構造における第１離間度及び第２離間度を示す正面図である。 Here, the stress generated in the fixed portion 13 due to the load of the vehicle-mounted product 2 applied to the support plate 12 will be described with reference to FIGS. 2 and 3. FIG. 2 is a perspective view of a support structure of a vehicle-mounted product of a comparative example. FIG. 3A is a front view showing a first degree of separation and a second degree of separation in the support structure of the vehicle-mounted product of FIG. 1. FIG. 3B is a front view showing the first degree of separation and the second degree of separation in the support structure of the vehicle-mounted product of the comparative example.

図２に示されるように、比較例の車両搭載品の支持構造２００の支持ブラケット２１０は、車両前後方向について互いに同方向を向くように固定部材２１１のフレーム部材１側の端部が屈曲されて固定部２１３が形成されている点で、車両搭載品の支持構造１００の支持ブラケット１０と異なっている。支持ブラケット２１０では、一対の固定部２１３は、車両前後方向において互いに近付くように固定部材２１１のフレーム部材１側の端部から延びている。 As shown in FIG. 2, in the support bracket 210 of the support structure 200 of the vehicle-mounted product of the comparative example, the end portion of the fixing member 211 on the frame member 1 side is bent so as to face the same direction with respect to the vehicle front-rear direction. It differs from the support bracket 10 of the support structure 100 of the vehicle-mounted product in that the fixing portion 213 is formed. In the support bracket 210, the pair of fixing portions 213 extend from the end portions of the fixing members 211 on the frame member 1 side so as to approach each other in the vehicle front-rear direction.

各固定部２１３には、締結具６を挿通させる貫通孔が少なくとも１つ（ここでは１つずつ）形成されている。各固定部２１３は、フレーム部材１の側面１ａに沿って配置された状態で、締結具６の位置を締結位置として当該締結位置においてフレーム部材１の側面に固定されている。 Each fixing portion 213 is formed with at least one through hole (here, one through hole) through which the fastener 6 is inserted. Each fixing portion 213 is fixed to the side surface of the frame member 1 at the fastening position with the position of the fastener 6 as the fastening position in a state of being arranged along the side surface 1a of the frame member 1.

図３に示されるように、固定部２１３における下方側の貫通孔の位置は、下固定部１３ｂにおける貫通孔の位置に対応する位置となっている。また、固定部材２１１に架け渡された状態の支持プレート１２の支持穴１２ａの位置は、固定部材１１に架け渡された状態の支持プレート１２の支持穴１２ａの位置と対応する位置となっている。つまり、支持プレート１２の支持穴１２ａの位置から上固定部１３ａにおける締結位置までの距離が、支持プレート１２の支持穴１２ａの位置から固定部２１３における上方側の締結位置までの距離と比較して長い距離になっている。 As shown in FIG. 3, the position of the lower through hole in the fixing portion 213 is a position corresponding to the position of the through hole in the lower fixing portion 13b. Further, the position of the support hole 12a of the support plate 12 in the state of being bridged to the fixing member 211 is a position corresponding to the position of the support hole 12a of the support plate 12 in the state of being bridged to the fixing member 11. .. That is, the distance from the position of the support hole 12a of the support plate 12 to the fastening position in the upper fixing portion 13a is compared with the distance from the position of the supporting hole 12a of the support plate 12 to the upper fastening position in the fixing portion 213. It's a long distance.

このような比較例の車両搭載品の支持構造２００と比べて、支持プレート１２から固定部材１１を介して複数の締結位置のそれぞれに分散される車両搭載品２の支持荷重の偏りを緩和するために、車両搭載品の支持構造１００において第１離間度を第２離間度で除した比率は、車両搭載品の支持構造１００において第１離間度を第２離間度で除した比率よりも小さくされている。 Compared with the support structure 200 of the vehicle-mounted product of such a comparative example, in order to alleviate the bias of the support load of the vehicle-mounted product 2 distributed from the support plate 12 to each of the plurality of fastening positions via the fixing member 11. In addition, the ratio of the first degree of separation divided by the second degree of separation in the support structure 100 of the vehicle-mounted product is smaller than the ratio of the first degree of separation divided by the second degree of separation in the support structure 100 of the vehicle-mounted product. ing.

離間度とは、車両搭載品２の支持荷重が支持プレート１２に作用する仮想的な荷重点の位置から締結位置までの離れ具合を表す指標である。図３の例では、離間度は、仮想的な荷重点の位置である支持プレート１２の支持穴１２ａの中心Ｐ１と締結具６の位置とを結ぶ線分をフレーム部材１の側面１ａと平行な仮想平面に投影した線分（以下、単に「投影線分」という）の長さとされている。なお、仮想的な荷重点の位置としては、対象とする締結具６の位置を含む固定部材１１，２１１に近い方の支持プレート１２の支持穴１２ａの位置を用いることができる。 The degree of separation is an index showing the degree of separation from the position of the virtual load point on which the support load of the vehicle-mounted product 2 acts on the support plate 12 to the fastening position. In the example of FIG. 3, the degree of separation is such that the line segment connecting the center P1 of the support hole 12a of the support plate 12 and the position of the fastener 6 which is the position of the virtual load point is parallel to the side surface 1a of the frame member 1. It is said to be the length of a line segment projected onto a virtual plane (hereinafter, simply referred to as "projected line segment"). As the position of the virtual load point, the position of the support hole 12a of the support plate 12 closer to the fixing members 11 and 11 including the position of the target fastener 6 can be used.

第１離間度は、離間度のうち最大の離間度である。図３（ａ）の例では、第１離間度は、支持プレート１２の支持穴１２ａの中心Ｐ１と下固定部１３ｂを固定する締結具６の位置（締結位置Ｐ２）とを結ぶ投影線分の長さＢである。図３（ｂ）の例では、第１離間度は、支持プレート１２の支持穴１２ａの中心Ｐ１と固定部２１３を固定する締結具６のうち下方側の締結具６の位置（締結位置Ｐ３）とを結ぶ投影線分の長さＤである。 The first degree of separation is the maximum degree of separation among the degrees of separation. In the example of FIG. 3A, the first degree of separation is a projection line segment connecting the center P1 of the support hole 12a of the support plate 12 and the position of the fastener 6 for fixing the lower fixing portion 13b (fastening position P2). Length B. In the example of FIG. 3B, the first degree of separation is the position of the fastener 6 on the lower side of the fastener 6 for fixing the center P1 of the support hole 12a of the support plate 12 and the fixing portion 213 (fastening position P3). It is the length D of the projection line segment connecting with.

第２離間度は、離間度のうち最小の離間度である。図３（ａ）の例では、第２離間度は、支持プレート１２の支持穴１２ａの中心Ｐ１と上固定部１３ａを固定する締結具６の位置（締結位置Ｐ４）とを結ぶ投影線分の長さＡである。図３（ｂ）の例では、第２離間度は、支持プレート１２の支持穴１２ａの中心Ｐ１と固定部２１３を固定する締結具６のうち上方側の締結具６の位置（締結位置Ｐ５）とを結ぶ投影線分の長さＣである。 The second degree of separation is the minimum degree of separation among the degrees of separation. In the example of FIG. 3A, the second degree of separation is a projection line segment connecting the center P1 of the support hole 12a of the support plate 12 and the position of the fastener 6 for fixing the upper fixing portion 13a (fastening position P4). Length A. In the example of FIG. 3B, the second degree of separation is the position of the fastener 6 on the upper side of the fastener 6 for fixing the center P1 of the support hole 12a of the support plate 12 and the fixing portion 213 (fastening position P5). It is the length C of the projection line segment connecting with.

ここで、離間度は、支持プレート１２の支持穴１２ａの中心Ｐ１に掛かる荷重に起因してそれぞれの締結位置に対して加えられるモーメントの腕の長さに相当するものと捉えることができる。したがって、車両搭載品の支持構造２００に例示されるように第１離間度を第２離間度で除した比率が大きい（例えば４を超える値よりも大きい）ほど、支持プレート１２の支持穴１２ａの中心Ｐ１に掛かる荷重に起因する固定部材２１１の締結位置Ｐ５にて発生する応力の偏り（ばらつき）が大きくなる。そのため、複数の締結位置Ｐ３，Ｐ５のうち、締結位置Ｐ５にて発生する応力が突出して大きくなってしまうことが生じ得る。その場合、当該締結位置Ｐ５にて固定部材２１１に生じる応力について、固定部材２１１の疲労限度に対する余裕が小さくなってしまう。 Here, the degree of separation can be regarded as corresponding to the length of the arm of the moment applied to each fastening position due to the load applied to the center P1 of the support hole 12a of the support plate 12. Therefore, as illustrated in the support structure 200 of the vehicle-mounted product, the larger the ratio of the first degree of separation divided by the second degree of separation (for example, larger than a value exceeding 4), the larger the support hole 12a of the support plate 12. The bias (variation) of the stress generated at the fastening position P5 of the fixing member 211 due to the load applied to the center P1 becomes large. Therefore, among the plurality of fastening positions P3 and P5, the stress generated at the fastening position P5 may be prominently increased. In that case, with respect to the stress generated in the fixing member 211 at the fastening position P5, the margin for the fatigue limit of the fixing member 211 becomes small.

そこで、車両搭載品の支持構造１００では、図３のような第１離間度Ｂ，Ｄ及び第２離間度Ａ，Ｃを規定した場合に、車両搭載品の支持構造１００において第１離間度を第２離間度で除した比率は、車両搭載品の支持構造１００において第１離間度を第２離間度で除した比率よりも小さくされている。具体的には、車両搭載品の支持構造１００において第１離間度を第２離間度で除した比率は、３．５以下とされている。
車両搭載品の支持構造１００において第１離間度を第２離間度で除した比率は、３以下であってもよいし、２．５以下であってもよいし、２以下であってもよい。第１離間度を第２離間度で除した比率を上記の数値以下とすることにより、締結位置Ｐ４にて発生する応力が突出して大きくなってしまうことが抑制され、締結位置Ｐ４における固定部材１１の疲労限度に対する余裕は、締結位置Ｐ５における固定部材２１１の疲労限度に対する余裕よりも大きいものとなる。 Therefore, in the support structure 100 of the vehicle-mounted product, when the first separation degrees B and D and the second separation degrees A and C as shown in FIG. 3 are specified, the first separation degree is set in the support structure 100 of the vehicle-mounted product. The ratio divided by the second degree of separation is smaller than the ratio of the first degree of separation divided by the second degree of separation in the support structure 100 of the vehicle-mounted product. Specifically, the ratio of the first degree of separation divided by the second degree of separation in the support structure 100 of the vehicle-mounted product is 3.5 or less.
The ratio of the first degree of separation divided by the second degree of separation in the support structure 100 of the vehicle-mounted product may be 3 or less, 2.5 or less, or 2 or less. .. By setting the ratio of the first degree of separation divided by the second degree of separation to the above value or less, it is possible to prevent the stress generated at the fastening position P4 from protruding and becoming large, and the fixing member 11 at the fastening position P4. The margin for the fatigue limit of is larger than the margin for the fatigue limit of the fixing member 211 at the fastening position P5.

［作用及び効果］
以上、本実施形態に係る車両搭載品の支持構造１００では、第１離間度を第２離間度で除した比率が３．５以下とされている。この比率は、離間度が第１離間度である締結位置Ｐ２に掛かる荷重に対して、離間度が第２離間度である締結位置Ｐ４に掛かる荷重がどの程度大きいかに対応する。そのため、比率が３．５を超える場合（車両搭載品の支持構造２００）と比較して、離間度が第２離間度である締結位置Ｐ４に分散される車両搭載品２の支持荷重を抑えることができる。したがって、固定部材１１に生じる応力についての疲労限度に対する余裕が小さくなることを抑制することが可能となる。 [Action and effect]
As described above, in the support structure 100 of the vehicle-mounted product according to the present embodiment, the ratio of the first degree of separation divided by the second degree of separation is 3.5 or less. This ratio corresponds to how large the load applied to the fastening position P4 having the second degree of separation is relative to the load applied to the fastening position P2 having the first degree of separation. Therefore, as compared with the case where the ratio exceeds 3.5 (support structure 200 of the vehicle-mounted product), the supporting load of the vehicle-mounted product 2 distributed at the fastening position P4 in which the degree of separation is the second degree of separation is suppressed. Can be done. Therefore, it is possible to prevent the margin for the fatigue limit of the stress generated in the fixing member 11 from becoming small.

車両搭載品の支持構造１００では、支持プレート１２は、延在部１４における車両上下方向の上側で支持されており、固定部１３は、固定部材１１のフレーム部材１側において車両上下方向の上側に設けられると共に締結位置Ｐ４においてフレーム部材１の側面１ａに固定される上固定部１３ａと、固定部材１１のフレーム部材１側において車両上下方向の下側に設けられると共に締結位置Ｐ２においてフレーム部材１の側面１ａに固定される下固定部１３ｂと、を含む。上固定部１３ａは、車両前後方向において互いに離れるように固定部材１１のフレーム部材１側の端部から延びており、下固定部１３ｂは、車両前後方向において互いに近付くように固定部材１１のフレーム部材１側の端部から延びている。これにより、下固定部１３ｂよりも支持プレート１２に近い上固定部１３ａが、車両前後方向において互いに離れるように延びていることから、車両前後方向において互いに近付くように上固定部を構成する場合と比べて、支持プレート１２から上固定部１３ａの締結位置Ｐ５までの距離を長くすることができる。よって、この構成によれば、第１離間度を第２離間度で除した比率を３．５以下とすることの容易化を図ることができる。 In the support structure 100 of the vehicle-mounted product, the support plate 12 is supported on the upper side of the extending portion 14 in the vehicle vertical direction, and the fixing portion 13 is on the upper side of the fixing member 11 on the frame member 1 side in the vehicle vertical direction. An upper fixing portion 13a provided and fixed to the side surface 1a of the frame member 1 at the fastening position P4, and a frame member 1 provided at the lower side in the vertical direction of the vehicle on the frame member 1 side of the fixing member 11 and at the fastening position P2. Includes a lower fixing portion 13b fixed to the side surface 1a. The upper fixing portion 13a extends from the end portion of the fixing member 11 on the frame member 1 side so as to be separated from each other in the vehicle front-rear direction, and the lower fixing portion 13b is a frame member of the fixing member 11 so as to approach each other in the vehicle front-rear direction. It extends from the end on one side. As a result, the upper fixing portions 13a, which are closer to the support plate 12 than the lower fixing portion 13b, extend so as to be separated from each other in the vehicle front-rear direction. In comparison, the distance from the support plate 12 to the fastening position P5 of the upper fixing portion 13a can be increased. Therefore, according to this configuration, it is possible to facilitate the ratio of the first degree of separation divided by the second degree of separation to be 3.5 or less.

なお、上固定部１３ａ及び下固定部１３ｂのそれぞれは、固定部材１１のフレーム部材１側の端部が互いに反対方向に略直角に屈曲されることで形成されている。これにより、例えば固定部材１１のフレーム部材１側の端部に別体の板部材を溶接することで上固定部１３ａ及び下固定部１３ｂのそれぞれを形成する場合と比べて、溶接による入熱に起因する強度低下を避けることができる。そのため、疲労限度自体が低下することを抑制しつつ、疲労限度に対する余裕の低下抑制を図ることができる。 Each of the upper fixing portion 13a and the lower fixing portion 13b is formed by bending the ends of the fixing member 11 on the frame member 1 side in opposite directions at substantially right angles. As a result, as compared with the case where each of the upper fixing portion 13a and the lower fixing portion 13b is formed by welding a separate plate member to the end portion of the fixing member 11 on the frame member 1 side, heat input due to welding is increased. The resulting decrease in strength can be avoided. Therefore, it is possible to suppress a decrease in the margin with respect to the fatigue limit while suppressing a decrease in the fatigue limit itself.

また、車両搭載品の支持構造１００では、支持ブラケット１０は、車両搭載品２として排気浄化装置の触媒ケース及び燃料タンク等の重量物を吊り下げるためのブラケットである。そのため、固定部材１１に生じる応力についての疲労限度に対する余裕が小さくなることを抑制するという上記作用効果が顕著なものとなり、特に有益であるということができる。 Further, in the support structure 100 of the vehicle-mounted product, the support bracket 10 is a bracket for suspending a heavy object such as a catalyst case of an exhaust gas purification device and a fuel tank as the vehicle-mounted product 2. Therefore, the above-mentioned action effect of suppressing the margin for the fatigue limit of the stress generated in the fixing member 11 from becoming small becomes remarkable, and it can be said that it is particularly beneficial.

［変形例］
以上、本発明に係る実施形態について説明したが、本発明は、上述した実施形態に限られるものではない。 [Modification example]
Although the embodiments according to the present invention have been described above, the present invention is not limited to the above-described embodiments.

上記実施形態では、フレーム部材１は、車両前後方向を長手方向として延びていたが、車両左右方向などその他の方向を長手方向として延びていてもよい。 In the above embodiment, the frame member 1 extends in the vehicle front-rear direction as the longitudinal direction, but may extend in other directions such as the vehicle left-right direction as the longitudinal direction.

上記実施形態では、支持ブラケット１０が２枚の支持プレート１２を備えていたが、支持プレート１２の枚数は１枚でもよいし、３枚以上であってもよい。車両搭載品２の形状や寸法、重量等に応じて適宜選択することができる。 In the above embodiment, the support bracket 10 includes two support plates 12, but the number of support plates 12 may be one or three or more. It can be appropriately selected according to the shape, dimensions, weight, etc. of the vehicle-mounted product 2.

上記実施形態では、車両搭載品２として排気浄化装置の触媒ケース及び燃料タンク等の重量物を例示したが、重量物に限定されず、種々の車両搭載品が支持可能である。 In the above embodiment, heavy objects such as a catalyst case and a fuel tank of the exhaust gas purification device are exemplified as the vehicle-mounted product 2, but the vehicle-mounted product is not limited to the heavy objects, and various vehicle-mounted products can be supported.

上記実施形態では、固定部１３として上固定部１３ａ及び下固定部１３ｂを有する例を示したが、固定部１３の配置、形状及び数はこれに限定されない。延在部１４は、全体として車両前後方向視で略Ｌ字状をなしていたが、形状はこれに限定されず、種々の形状を採用し得る。また、固定部材１１は、一対設けられていたが、これに限定されない。固定部材の数は、複数個であればよい。 In the above embodiment, an example in which the upper fixing portion 13a and the lower fixing portion 13b are provided as the fixing portion 13 is shown, but the arrangement, shape and number of the fixing portions 13 are not limited thereto. The extending portion 14 has a substantially L-shape as a whole when viewed in the front-rear direction of the vehicle, but the shape is not limited to this, and various shapes can be adopted. Further, the fixing members 11 are provided in pairs, but the present invention is not limited to this. The number of fixing members may be a plurality.

上記実施形態では、上固定部１３ａ及び下固定部１３ｂに締結位置が配置されていたが、締結位置の配置はこれに限定されない。例えば、支持プレート１２の支持穴１２ａの位置を中心とする所定半径の仮想的な円弧上に位置するように締結位置が配置されていてもよい。また、車両搭載品２の支持荷重が支持プレート１２に作用する仮想的な荷重点の位置として、支持プレート１２の支持穴１２ａの中心Ｐ１を例示したが、これに限定されない。例えば、支持プレート１２の支持穴１２ａの中心Ｐ１に代えて、支持プレート１２の４つの中心Ｐ１を結ぶ仮想的な四角形の一対の対角線の交点であってもよいし、車両搭載品２の重心を通る鉛直線と支持プレート１２を含む水平面との交点であってもよい。要は、車両搭載品２の支持荷重が支持プレート１２に作用する仮想的な荷重点の位置から締結位置までの離間度のうち最大の離間度である第１離間度を、離間度のうち最小の離間度である第２離間度で除した比率が、３．５以下であればよい。なお、離間度として、車両搭載品２の支持荷重が支持プレート１２に作用する仮想的な荷重点の位置から締結位置までの距離を用いてもよい。 In the above embodiment, the fastening positions are arranged in the upper fixing portion 13a and the lower fixing portion 13b, but the arrangement of the fastening positions is not limited to this. For example, the fastening position may be arranged so as to be located on a virtual arc having a predetermined radius centered on the position of the support hole 12a of the support plate 12. Further, the center P1 of the support hole 12a of the support plate 12 is exemplified as the position of the virtual load point on which the support load of the vehicle-mounted product 2 acts on the support plate 12, but the present invention is not limited to this. For example, instead of the center P1 of the support hole 12a of the support plate 12, it may be the intersection of a pair of imaginary quadrangular diagonal lines connecting the four centers P1 of the support plate 12, or the center of gravity of the vehicle-mounted product 2 may be set. It may be the intersection of the vertical line passing through and the horizontal plane including the support plate 12. In short, the first degree of separation, which is the maximum degree of separation from the position of the virtual load point where the support load of the vehicle-mounted product 2 acts on the support plate 12 to the fastening position, is the minimum of the degree of separation. The ratio divided by the second degree of separation, which is the degree of separation of, may be 3.5 or less. As the degree of separation, the distance from the position of the virtual load point on which the support load of the vehicle-mounted product 2 acts on the support plate 12 to the fastening position may be used.

１…フレーム部材、１ａ…側面、２…車両搭載品、６…締結具、１０…支持ブラケット、１１…固定部材、１２…支持プレート、１３…固定部、１３ａ…上固定部（固定部）、１３ｂ…下固定部（固定部）、１４…延在部、１００…車両搭載品の支持構造、Ａ，Ｃ…第２離間度、Ｂ，Ｄ…第１離間度、Ｐ１…仮想的な荷重点の位置、Ｐ２，Ｐ３，Ｐ４，Ｐ５…締結位置。 1 ... Frame member, 1a ... Side surface, 2 ... Vehicle-mounted product, 6 ... Fastener, 10 ... Support bracket, 11 ... Fixing member, 12 ... Support plate, 13 ... Fixing part, 13a ... Upper fixing part (fixing part), 13b ... Lower fixed part (fixed part), 14 ... Extended part, 100 ... Support structure of vehicle-mounted product, A, C ... Second degree of separation, B, D ... First degree of separation, P1 ... Virtual load point Position, P2, P3, P4, P5 ... Fastening position.

Claims (2)

車両のフレーム部材の側面に固定される支持ブラケットを用いて車両搭載品を支持する車両搭載品の支持構造であって、
前記支持ブラケットは、前記フレーム部材の側面に並設される複数の固定部材と、前記固定部材に架け渡されて前記車両搭載品を支持する支持プレートと、を備え、
前記固定部材は、前記フレーム部材の側面に固定される固定部と、前記フレーム部材から離れる方向に前記固定部から延びて前記支持プレートを支持する延在部と、を有し、
前記固定部は、複数の締結具のそれぞれが配置される複数の締結位置において前記フレーム部材の側面に固定されており、
前記車両搭載品の支持荷重が前記支持プレートに作用する仮想的な荷重点の位置から前記締結位置までの距離に基づく離間度のうち最大の離間度である第１離間度を、前記離間度のうち最小の離間度である第２離間度で除した比率が、３．５以下である、車両搭載品の支持構造。 It is a support structure of a vehicle-mounted product that supports the vehicle-mounted product by using a support bracket fixed to the side surface of the frame member of the vehicle.
The support bracket includes a plurality of fixing members arranged side by side on the side surface of the frame member, and a support plate that is bridged over the fixing members to support the vehicle-mounted product.
The fixing member has a fixing portion fixed to a side surface of the frame member and an extending portion extending from the fixing portion in a direction away from the frame member to support the support plate.
The fixing portion is fixed to the side surface of the frame member at a plurality of fastening positions where each of the plurality of fasteners is arranged.
The first degree of separation, which is the maximum degree of separation based on the distance from the position of the virtual load point on which the support load of the vehicle-mounted product acts on the support plate to the fastening position, is defined as the degree of separation. A support structure for vehicle-mounted products in which the ratio divided by the second degree of separation, which is the minimum degree of separation, is 3.5 or less. 前記支持プレートは、前記延在部における車両上下方向の上側で支持されており、
前記固定部は、
前記固定部材の前記フレーム部材側において車両上下方向の上側に設けられると共に少なくとも１つの前記締結位置において前記フレーム部材の側面に固定される上固定部と、
前記固定部材の前記フレーム部材側において車両上下方向の下側に設けられると共に少なくとも１つの前記締結位置において前記フレーム部材の側面に固定される下固定部と、を含み、
前記上固定部は、車両前後方向において互いに離れるように前記固定部材の前記フレーム部材側の端部から延びており、
前記下固定部は、車両前後方向において互いに近付くように前記固定部材の前記フレーム部材側の端部から延びている、請求項１記載の車両搭載品の支持構造。 The support plate is supported on the upper side of the extending portion in the vertical direction of the vehicle.
The fixed part is
An upper fixing portion provided on the upper side of the fixing member on the frame member side in the vertical direction of the vehicle and fixed to the side surface of the frame member at at least one fastening position.
The fixing member includes a lower fixing portion provided on the lower side in the vertical direction of the vehicle on the frame member side and fixed to the side surface of the frame member at at least one fastening position.
The upper fixing portion extends from an end portion of the fixing member on the frame member side so as to be separated from each other in the front-rear direction of the vehicle.
The support structure for a vehicle-mounted product according to claim 1, wherein the lower fixing portion extends from an end portion of the fixing member on the frame member side so as to approach each other in the front-rear direction of the vehicle.
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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4850518A (en) * 1987-09-17 1989-07-25 General Motors Corporation Spare wheel carrier
JPH09217715A (en) * 1996-02-09 1997-08-19 Daikin Ind Ltd Connecting structure of press forming plate
JP2006123658A (en) * 2004-10-27 2006-05-18 Mitsubishi Fuso Truck & Bus Corp Mounting structure of electronic equipment for vehicle
JP2018172026A (en) * 2017-03-31 2018-11-08 日野自動車株式会社 Support structure of on-vehicle component

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4850518A (en) * 1987-09-17 1989-07-25 General Motors Corporation Spare wheel carrier
JPH09217715A (en) * 1996-02-09 1997-08-19 Daikin Ind Ltd Connecting structure of press forming plate
JP2006123658A (en) * 2004-10-27 2006-05-18 Mitsubishi Fuso Truck & Bus Corp Mounting structure of electronic equipment for vehicle
JP2018172026A (en) * 2017-03-31 2018-11-08 日野自動車株式会社 Support structure of on-vehicle component

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