WO2018038210A1 - アンダーランプロテクターの支持構造 - Google Patents
アンダーランプロテクターの支持構造 Download PDFInfo
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- WO2018038210A1 WO2018038210A1 PCT/JP2017/030346 JP2017030346W WO2018038210A1 WO 2018038210 A1 WO2018038210 A1 WO 2018038210A1 JP 2017030346 W JP2017030346 W JP 2017030346W WO 2018038210 A1 WO2018038210 A1 WO 2018038210A1
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- WIPO (PCT)
- Prior art keywords
- stay
- width direction
- vehicle width
- support structure
- frame
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R19/00—Wheel guards; Radiator guards, e.g. grilles; Obstruction removers; Fittings damping bouncing force in collisions
- B60R19/56—Fittings damping bouncing force in truck collisions, e.g. bumpers; Arrangements on high-riding vehicles, e.g. lorries, for preventing vehicles or objects from running thereunder
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
- B62D25/08—Front or rear portions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R2021/0002—Type of accident
- B60R2021/0004—Frontal collision
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R2021/0065—Type of vehicles
- B60R2021/0074—Utility vehicles
- B60R2021/0083—Pick-up trucks; Light trucks; Sport utility vehicles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
- B60Y2200/00—Type of vehicle
- B60Y2200/10—Road Vehicles
- B60Y2200/11—Passenger cars; Automobiles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
- B60Y2200/00—Type of vehicle
- B60Y2200/10—Road Vehicles
- B60Y2200/14—Trucks; Load vehicles, Busses
- B60Y2200/142—Heavy duty trucks
Definitions
- the present invention relates to a support structure for an underrun protector that prevents one vehicle from entering under the other vehicle when a vehicle such as an automobile collides with each other.
- the passenger car when a passenger car and a large vehicle such as a truck collide head-on or rear-end, the passenger car may sink under the large vehicle due to the difference in the installation height of strength members such as cross members provided in each vehicle. is there. For this reason, in the front part and the rear part of the large-sized vehicle, a strength member called an under lamp protector arranged in accordance with the installation height of the strength member provided in the passenger car is provided. As a result, the passenger car is prevented from entering the vehicle during a collision.
- underrun protectors include those described in Patent Documents 1 to 3. These underrun protectors have a structure in which a beam extending in the vehicle width direction is bolted to a vehicle body frame via a bracket and a stay (support structure).
- the underrun protector is required to have sufficient load bearing performance.
- a load is applied to the beam collision surface (the surface on which the opponent vehicle collides) at a position outside the beam stay attachment position in the vehicle width direction. There is a way to evaluate if you can. Since the performance of the under-run protector depends on the superiority or inferiority of the load-bearing performance, it is desired to develop an under-run protector in which the maximum input load in the load-bearing evaluation test is larger than before. It is also desired to be lightweight.
- the beam has a structure that resists bending moment about the vertical direction of the vehicle and the stay has a structure that resists torsional moment about the vertical direction of the vehicle.
- Patent Document 1 “a web surface fixed to a frame web surface and vertically oriented, and a web surface extending from one end in the vehicle front-rear direction to the vehicle width direction outside and fixed to an under-run protector.
- a first member comprising a flange surface, a horizontally oriented frame flange surface and an upper surface fixed to the web surface, and extending vertically downward from one end of the upper surface in the vehicle longitudinal direction.
- a structure is disclosed in which a side frame is protected from an impact load at the time of a slight collision by a stay and frame fixing structure including a member.
- the stay is composed of “a stay body that connects the vehicle body frame and the beam”, “a stay reinforcement body that reinforces the stay body”, and “a gusset that reinforces the connection portion of the stay and the beam”.
- a structure that increases resistance to bending deformation of a beam by a gusset that is configured and provided between the beam and a stay is disclosed.
- a concave portion is formed in the stay main body by providing bent portions at both ends in the short direction of the stay main body, and the stay reinforcing body is fitted into the concave portion to form a closed cross-sectional shape.
- a structure in which resistance to torsional deformation of the stay is increased by the stay structure is also disclosed.
- Patent Document 3 discloses a connection structure for connecting a beam to a vehicle body frame, a stay formed so as to extend in a vertical direction, an L-shaped bracket provided between the beam and the stay, a reinforcing material, and a reinforcement.
- a structure having a plate and a structure that, when a load is input to the beam, causes an action of inhibiting the inward deformation of the stay due to the load transmitted through the beam.
- Patent Document 1 relates to a fixing structure that protects a side frame, and load resistance performance is not improved only by this technique.
- the support structure of Patent Document 2 out-of-plane deformation of the stay reinforcement portion web surface arranged vertically of the stay reinforcement portion proceeds due to load input from the gusset and torsional deformation of the stay. As a result, sufficient load bearing performance cannot be improved.
- the connection structure of Patent Literature 3 when an opening is provided in the vehicle front-rear direction or both sides of the bracket or the stay from the inner side in the vehicle width direction of the reinforcing plate, the load bearing performance decreases.
- the present invention has been made in view of such problems of the prior art. Even if a load is applied to a position on the outer side in the vehicle width direction relative to the stay mounting position of the beam, the present invention is not affected by the torsional moment input to the stay.
- a support structure for an under-run protector that can suppress deformation and is lightweight and excellent in load bearing performance.
- the inventors of the present invention provide a support structure for a stay main body that connects a beam and a frame, a stay reinforcing body that reinforces the stay main body, and a support structure for an underlamp protector that includes a stay reinforcing body and a gusset provided between the beams.
- an opening is provided in the stay main body web surface oriented parallel to the vehicle vertical direction of the stay main body, and a pair of wall surfaces extending outward from the both ends of the opening in the vehicle width direction are opposed to each other.
- the above-mentioned problem can be solved by contacting the wall surface portion and the stay reinforcement at the height position of the at least one gusset in the vehicle vertical direction.
- the gist of the present invention is as follows. (1) a stay body that connects the beam and the frame, a stay reinforcement body that reinforces the stay body from the outside in the vehicle width direction, and a gusset provided between the stay reinforcement body and the beam,
- the stay body web surface of the stay body is provided with an opening, and a pair of wall surfaces extending from both ends of the opening in the vehicle front-rear direction toward the vehicle width direction outer side are provided to face each other,
- a support structure for an underrun protector wherein a wall surface portion is provided at a height corresponding to an installation position of the gusset, and is in contact with an inner surface in the vehicle width direction of the stay reinforcement body.
- the following configurations (2) to (8) may be used.
- the opening has a substantially rounded quadrilateral shape composed of a pair of straight sides opposed to each other and a pair of rounds opposed to each other, and both of the straight sides are located outward in the vehicle width direction.
- the support structure for an under-run protector according to (1) wherein the wall portion extending toward the vehicle is in contact with a surface of the stay reinforcement body in the vehicle width direction.
- the upper and lower surface portions of the stay reinforcing body extending from the vehicle vertical direction both ends of the stay reinforcing body toward the vehicle width direction inner side are provided, and the upper and lower surface portions are in contact with the stay main body. 1.
- the support structure for an underrun protector according to any one of 1) to (5).
- the frame includes a vertically oriented frame web surface, and a flange on a lower surface of the frame extending from the lower end of the frame web surface toward the vehicle width direction outer side.
- the present invention even if a load is applied to a position outside the vehicle width direction from the stay mounting position of the beam, deformation against torsional moment input to the stay can be suppressed, and light weight and excellent load bearing performance can be achieved.
- a support structure for the underrun protector can be obtained.
- FIG. 3 is a cross-sectional view taken along line AA in FIG. 2. It is the C section enlarged view of FIG. FIG. 3 is a sectional view taken along line BB in FIG. It is a top view which shows the load input conditions to an underrun protector. It is a perspective view which shows the support structure of the underrun protector of the comparative example 1. It is a perspective view of the modification of the underrun protector of the comparative example 1. It is a perspective view of the modification of the underrun protector of Example 1. FIG.
- an underrun protector 1 according to an embodiment of the present invention includes a beam 2 extending in the vehicle width direction W and an underrun protector support structure 3 for connecting the beam 2 and the frame 20. Composed.
- the support structure 3 for the underrun protector includes a stay body 4 that connects the beam 2 and the frame 20, a stay reinforcement body 5, and a gusset 6.
- the stay main body 4 has a stay main body web surface 4a that is vertically oriented and a stay main body front and rear surface portion 4b that extends from the end of the stay main body web surface 4a in the vehicle longitudinal direction L to the outside in the vehicle width direction W. It has a U shape.
- the stay body 4 is connected to the frame 20 at the frame web surface mounting portion 4f and the frame lower surface mounting portion 4g, and is connected to the beam 2 at the beam mounting portion 4c. Bolt fastening is used to connect the stay body 4 to the beam 2 and the frame 20.
- the stay reinforcement body 5 includes a stay reinforcement body web surface 5 a that is vertically oriented, and an end of the stay reinforcement body web surface 5 a that extends in the vehicle width direction W from the vehicle vertical direction V end. It has a substantially U-shaped shape with the stay reinforcing body upper and lower surface portions 5b extending.
- the stay reinforcement body 5 is disposed so as to cover the opening of the stay body 4 except for the frame web surface attachment portion 4f of the stay body 4.
- a closed cross section is formed by connecting the end of the stay reinforcement body web surface 5a in the vehicle longitudinal direction L and the stay main body front / rear surface portion 4b, and the end of the stay reinforcement upper / lower surface portion 5b and the stay main body web surface 4a. Arc welding is used for these connections.
- the stay main body 4 is reinforced from the outside in the vehicle width direction W by fixing the stay reinforcing body 5 in this way.
- the gusset 6 is a substantially triangular plate, and a plurality of gussets 6 are arranged along the vehicle vertical direction V (2 in the present embodiment) so as to span the beam mounting portion 4c and the outer surface of the stay reinforcing body web surface 5a in the vehicle width direction W. Are arranged side by side.
- the support structure 3 for the underrun protector according to the embodiment of the present invention is provided with an opening 4 d having a substantially rounded square shape on the stay main body web surface 4 a, and the vehicle having the opening 4 d. It has a wall surface portion 4e extending from both ends in the front-rear direction L to the outside in the vehicle width direction W. The wall surface portions 4e are provided so as to face each other. A wall surface portion 4e extending from the opposite sides of the substantially rounded quadrangular opening 4d is brought into contact with the stay reinforcing member 5 to support the upper gusset 6 via the web surface 5a of the stay reinforcing member 5. ing. Arc welding is used to connect the wall surface portion 4e and the stay reinforcement body 5. Note that the “substantially rounded quadrilateral” is a substantially quadrilateral composed of opposing straight sides and round portions having arbitrary radii of curvature that connect the end points of the respective straight sides.
- the underrun protector support structure 3 is configured as described above.
- the load resistance test is performed using the underrun protector 1 having the support structure 3 for the underrun protector, for example, as shown in FIG. 6, the position outside the vehicle width direction from the stay mounting position of the beam 2 (in FIG. 6).
- the indenter is applied to the collision surface of the beam 2 and a load is input.
- the wall surface 4e connected to the stay reinforcement 5 is at a height corresponding to the installation position of the gusset 6 as shown in an example described later. Since the reinforcing body web surface 5a is supported, the stay reinforcing body is reduced by reducing the out-of-plane deformation of the web surface 5a of the stay reinforcing body 5 and the torsional deformation of the stay main body 4 and the stay reinforcing body 5 with respect to the load input from the gusset 6. The buckling of the stay reinforcement 5 is suppressed by reducing the out-of-plane deformation of the web surface 5a.
- the “height corresponding to the installation position of the gusset 6” is a height at which the wall surface portion 4e connected to the stay reinforcement 5 overlaps at the installation position of the gusset 6 in the vehicle vertical direction V.
- the opening 4d is provided, so that the weight can be reduced.
- the right side of the substantially rounded quadrangular opening 4d is oriented substantially parallel to the vehicle vertical direction V.
- a wall surface portion 4e which is oriented substantially in parallel and connected to the stay reinforcement 5 may support the stay reinforcement web surface 5a at a height corresponding to the installation position of the gusset 6.
- the “height corresponding to the installation position of the gusset 6” is a height at which the wall surface portion 4e connected to the stay reinforcement 5 overlaps at the installation position of the gusset 6 in the vehicle vertical direction V.
- the stay reinforcing body web surface 5a can be supported in a wide range in the vehicle vertical direction V. It is preferable to orient the straight side portion substantially parallel to the vehicle vertical direction V.
- the stay body front / rear surface portion 4b and the beam mounting portion 4c are integrated, but the beam mounting portion 4c is separated and connected to the stay body 4 or the stay reinforcement body 5. Also good.
- the stay main body web surface 4a and the frame web surface attachment portion 4f are integrated, and the frame lower surface attachment portion 4g is separate, but the frame web surface attachment portion 4f is different.
- the frame lower surface mounting portion 4g may be integrated with the stay main body 4 or the stay reinforcing body 5.
- the frame lower surface mounting portion 4g may be used.
- the load received by the support structure 3 of the underrun protector can be transmitted to the frame 20 by shear deformation, and the load bearing performance is improved.
- the frame lower surface mounting portion 4g may be set appropriately according to the above.
- the upper and lower surface portions 5b of the stay reinforcing body 5 may be used.
- the upper and lower surface portions 5b of the stay reinforcing body 5 there is no opening in the vehicle vertical direction V of the stay main body 4 and the stay reinforcing body 5, and resistance to torsional deformation of the stay main body 4 and the stay reinforcing body 5 is increased. Since the load bearing performance is enhanced, the upper and lower surface portions 5b of the stay reinforcing body 5 may be appropriately set according to the required performance as the underrun protector 1.
- the shape of the opening 4d provided on the stay main body web surface 4a is a substantially rounded quadrangle.
- the shape is not particularly limited.
- the support structure 3 for the underrun protector 1 has the opening 4d on the stay main body web surface 4a, and includes the wall surface 4e extending from the both ends of the opening 4d to the outside in the vehicle width direction W. If the wall surface portion 4e is configured to be in contact with the inner surface of the stay reinforcing body 5 in the vehicle width direction W at a height corresponding to the installation position of the gusset 6, the above-described effects can be enjoyed. Even when a plurality of gussets 6 are installed, as long as the wall surface portion 4e supports the stay reinforcement 5 at a height corresponding to the installation position of at least one gusset, the gusset 6 of the supporting portion is supported.
- the stay reinforcement 5 is supported by the wall surface portion 4e having a length from the uppermost gusset 6 to the lowermost gusset 6 as described in the above embodiment. Is preferred.
- the height corresponding to the installation position of the gusset is a height at which the wall surface portion 4e connected to the stay reinforcement 5 overlaps at the installation position of the gusset 6 in the vehicle vertical direction V.
- the substantially rounded quadrangular opening 4d includes a stay main body opening length L1 (the length in the vehicle vertical direction V) and an average width W1 of the stay main body opening (the vehicle front-rear direction L) shown in FIGS. ), A length L0 (mm) from the flange of the frame lower surface 20b of the stay body 4 (length in the vehicle vertical direction V), and an average width W0 (mm) of the stay body (length in the vehicle longitudinal direction L).
- the height h (mm) in the vehicle width direction W of the closed section formed by the stay main body 4 and the stay reinforcement 5 is 0.5 ⁇ L1 / L0 ⁇ 0.8, and It is preferably formed so as to satisfy 2 ⁇ h ⁇ W1 ⁇ 0.85 ⁇ W0.
- the average width W0 of the stay main body is an average of the maximum value and the minimum value of the width of the stay main body (length in the vehicle longitudinal direction L).
- the average width W1 of the stay main body opening is an average of the maximum value and the minimum value of the width of the stay main body opening (length in the vehicle longitudinal direction L). If L1 / L0 is less than 0.5, the lightening effect is poor. On the other hand, if L1 / L0 exceeds 0.8, the effect of improving the load bearing performance may be reduced due to a decrease in the area of the stay main body web surface 4a.
- the provision of the round wall surface 4h contributes to prevention of out-of-plane deformation of the stay body 4.
- load-bearing performance increases by connecting the wall surface part 4e of the direct side part of the opening part 4d with the wall surface part 4h of a round part.
- the height h1 of the wall surface portion 4h of the round portion is less than 5 mm, the effect is poor, and if the height h1 of the wall surface portion 4h of the round portion is 15 mm or more, in addition to causing an increase in weight for the effect, a steel plate of 780 MPa or more is used. When applied, there is a high possibility of edge breakage during the molding of the round wall surface portion 4h.
- the height h1 of the wall surface 4h of the round part is more preferably 8 mm ⁇ h1 ⁇ 12 mm.
- the opening 4d is not provided only for weight reduction, but the opening 4d is provided, and the wall surface portion 4h of the round portion of the opening 4d reinforces the stay main body 4, and further the wall surface portion 4e.
- the stay reinforcement 5 By supporting the stay reinforcement 5, the load bearing performance of the underrun protector support structure is enhanced.
- the simulation of the load resistance evaluation test was performed using the underrun protector having the conventional underrun protector support structure and the underrun protector having the underrun protector support structure according to the above embodiment.
- the underrun protector support structure of the conventional structure is a structure (Comparative Example 1) in which an opening is not formed in the stay main body 54 as shown in FIG.
- the support structure for the underrun protector according to the present embodiment is the structure (Example 1) shown in FIG.
- the stay body is a 780 MPa class / 3.6 mm thick steel plate
- the stay reinforcement is 780 MPa class / 2.9 mm thick
- the gusset is 780 MPa class / 3.2 mm thick
- the frame lower surface mounting part is 780 MPa class / 3.2 mm thick.
- a steel plate is used.
- the height h in the vehicle width direction of the closed cross section formed by the stay main body and the stay reinforcing body in the first embodiment is 40 mm
- the height h1 of the wall surface portion 4h of the round portion of the opening is 8.2 mm
- W1 / W0 obtained by dividing the average width W1 of the opening by the average width W0 of the stay main body is 0.65
- L1 / L0 is obtained by dividing the length L1 of the stay main body by the length L0 of the stay main body from the flange on the lower surface of the frame. Is 0.73.
- the evaluation test is performed by applying an indenter to the side surface of the beam at a position on the outer side in the vehicle width direction from the stay mounting position as shown in FIG.
- the load input position is the same in Comparative Example 1 and Example 1.
- the indenter push-in amount (displacement amount) and the input load were recorded, and the load resistance of the underrun protectors of Comparative Example 1 and Example 1 was evaluated.
- FIG. 8 and FIG. 9 compare the deformation of the underrun protector support structure of Comparative Example 1 and Example 1.
- out-of-plane deformation (buckling) is seen in the web surface portion of the stay reinforcement body, but in FIG. 9, the out-of-plane deformation is not seen. From this, it was confirmed in the present invention that the out-of-plane deformation (buckling) of the web surface of the stay reinforcement is suppressed.
- FIG. 10 shows the relationship of the input load with respect to the indenter pushing amount of Comparative Example 1 and Example 1.
- the load bearing ratio shown in FIG. 10 is a value obtained by normalizing the recorded load with the maximum load of Comparative Example 1. From FIG. 10, it was confirmed that the load of Example 1 was improved as compared with Comparative Example 1.
- Table 1 shows the maximum load ratio of Example 1 relative to Comparative Example 1 and the weight ratio of the support structure of the underrun protector.
- the load ratio in Table 1 is a value obtained by dividing the maximum load of Example 1 by the maximum load of Comparative Example 1.
- the weight ratio in Table 1 is a value obtained by dividing the weight of the support structure for the underrun protector of Example 1 by the weight of the support structure for the underrun protector of Comparative Example 1.
- Example 1 As shown in Table 1, the maximum load of Example 1 is improved by 10% and the weight is reduced by 5% or more compared to Comparative Example 1. That is, it was shown that the support structure of the underrun protector of Example 1 can be reduced in weight while improving the load bearing performance as compared with the conventional structure.
- Example 2 As shown in Table 2, the maximum load of Example 2 is improved by 10% and the weight is reduced by 5% or more compared to Comparative Example 2. That is, the support structure of the under-run protector of the second embodiment can be reduced in weight while improving the load bearing performance as compared with the conventional structure.
- the effects of the frame lower surface mounting portion 4g and the upper and lower surface portions 5b of the stay reinforcement 5 are as follows. It was shown that it does not depend on the presence or absence.
- Example 1 the same evaluation test was performed on the structures (Example 3 and Example 4) in which the height h1 of the wall surface part 4h of the round part of the opening was set to 0 mm and 38.2 mm. Carried out.
- the relationship between the height h1 of the wall surface portion 4h of the round portion and the maximum load efficiency is shown in FIG.
- the maximum load efficiency is a value obtained by dividing the maximum load input to the beam by the total weight of the support structure of the underrun protector. The higher this value, the better the balance between weight and load bearing performance.
- the maximum load efficiency is higher in the 8.2 mm structure than in the structure in which the height h1 of the round wall surface part 4 h is 0 mm. From this, it was shown that the load bearing performance is enhanced by connecting the wall portion of the straight side portion with the wall portion of the round portion. On the other hand, the maximum load efficiency is higher in the 8.2 mm structure compared to the structure in which the height h1 of the wall surface portion 4h of the round portion is 38.2 mm. From this, it was shown that even if the wall surface of the round part is too high, the increase in weight increases for the effect of improving the maximum load, and the optimum range is shown.
- the present invention can be applied to a support structure for an underrun protector attached to a vehicle such as an automobile, the industrial applicability is great.
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Abstract
Description
本願は、2016年8月26日に、日本に出願された特願2016-165626号に基づき優先権を主張し、その内容をここに援用する。
特許文献2には、ステーが、“車体フレームとビームとを連結するステー本体”と、“ステー本体を補強するステー補強体”と、“ステーとビームの接続部を補強するガセット”と、から構成され、ビームとステーとの間に掛け渡して設けたガセットにより、ビームの曲げ変形に対する抵抗を高める構造が開示されている。また、特許文献2には、ステー本体の短手方向両端に折曲部が設けられることによってステー本体に凹部が形成され、前記凹部に前記ステー補強体が嵌め込まれて閉断面形状が形成されたステー構造により、ステーのねじり変形に対する抵抗を高めた構造も開示されている。
特許文献3は、ビームを車体フレームに接続する接続構造体と、鉛直方向に延びるように形成されたステーと、ビームとステーとの間に設けられたL字形のブラケットと、補強材と、補強板と、を有する構造により、ビームに対して荷重が入力された際に、ビームを介して伝達された荷重によるステーの内方への変形を阻害する作用を生じさせる構造が開示されている。
特許文献2の支持構造では、ガセットからの荷重入力およびステーのねじり変形により、ステー補強部の鉛直に配置されたステー補強部ウェブ面の面外変形が進行する。これにより十分な耐荷重性能の向上が得られない。
特許文献3の接続構造体では、補強板の車両幅方向内側からブラケットまたはステーの車両前後方向のどちらかまたは両側に開口部を設けた場合、耐荷重性能が低下する。すなわち、ブラケットの車両前後方向のどちらかまたは両側に開口部を設けた場合、ブラケットが開口部の形成によって剛性が低くなるので、ブラケットから入力された荷重がブラケットの車体フレーム側の面全体に伝達されない。よって、耐荷重性能が低下する。また、ステーの車両前後方向のどちらかまたは両側に開口部を設けた場合、補強部材からの入力を受ける面積が減るため、耐荷重性能が低下する。
(1)ビーム及びフレーム間を接続するステー本体と、前記ステー本体を車両幅方向の外側から補強するステー補強体と、前記ステー補強体及び前記ビーム間に設けられたガセットと、を備え、前記ステー本体のステー本体ウェブ面に開口部が設けられ、前記開口部の車両前後方向の両端から車両幅方向外側に向かって延設された一対の壁面部が互いに対向するように設けられ、前記各壁面部が、前記ガセットの設置位置に対応する高さに設けられ、前記ステー補強体の車両幅方向内側の面に当接されているアンダーランプロテクターの支持構造。
また、以下(2)~(8)のような構成であっても良い。
(2)前記開口部が互いに対向する一対の直辺部と互いに対向する一対の丸部から構成される略角丸四角形の形状を有し、前記各直辺部の両方から車両幅方向外側に向かって延設された前記壁面部が前記ステー補強体の車両幅方向内側の面に当接されている、上記(1)に記載のアンダーランプロテクターの支持構造。
(3)前記壁面部が前記ステー本体ウェブ面を折り曲げて形成されている、上記(1)又は(2)に記載のアンダーランプロテクターの支持構造。
(4)前記開口部の長さL1と、前記開口部の平均幅W1と、前記フレーム下面のフランジからの前記ステー本体の長さL0と、前記ステー本体の平均幅W0と、前記ステー本体と前記ステー補強体で形成される閉断面の車両幅方向の高さhとの関係が、0.5≦L1/L0≦0.8、および、2×h≦W1≦0.85×W0を満たす、上記(2)又は(3)に記載のアンダーランプロテクターの支持構造。
(5)前記丸部の車両幅方向外側の面から車両幅方向外側に向かって延設された壁面部の高さh1が5mm≦h1≦15mmである、上記(2)~(4)のいずれか一項に記載のアンダーランプロテクターの支持構造。
(6)前記ステー補強体の車両上下方向両端から車両幅方向内側に向かって延設されたステー補強体の上下面部が設けられ、前記上下面部が前記ステー本体に当接されている、上記(1)~(5)のいずれか一項に記載のアンダーランプロテクターの支持構造。
(7)前記フレームは、鉛直に配向されたフレームウェブ面と、前記フレームウェブ面の下端から車両幅方向外側に向かって延設されたフレーム下面のフランジとを有し、前記ステー本体は、前記フレームウェブ面および前記フランジで固定されている、上記(1)~(6)のいずれか一項に記載のアンダーランプロテクターの支持構造。
(8)前記ステー本体と前記ステー補強体が780MPa級以上の強度を有する鋼板からなる、上記(1)~(7)のいずれか一項に記載のアンダーランプロテクターの支持構造。
ステー本体の平均幅W0とは、ステー本体の幅(車両前後方向Lの長さ)の最大値と最小値の平均である。ステー本体開口部の平均幅W1とは、ステー本体開口部の幅(車両前後方向Lの長さ)の最大値と最小値の平均である。
L1/L0が0.5未満であると、軽量化効果が乏しい。逆にL1/L0が0.8を超えると、ステー本体ウェブ面4aの面積減少により耐荷重性能向上の効果が小さくなるおそれがある。W1が2×h未満であると、壁面部4eの高さ(車両幅方向Wの長さ)がh以上に形成できなくなり、壁面部4eをステー補強体ウェブ面5aと当接できなくなる。一方、W1が0.85×W0を超える場合、ステー本体ウェブ面4aの面積減少により耐荷重性能向上の効果が小さくなる。
2 ビーム
3 アンダーランプロテクター支持構造
4 ステー本体
4a ステー本体ウェブ面
4b ステー本体前後面部
4c ビーム取付部
4d 開口部
4e 壁面部
4f フレームウェブ面取付部
4g フレーム下面取付部
4h 丸部の壁面部
5 ステー補強体
5a ステー補強体ウェブ面
5b ステー補強体上下面部
6 ガセット
20 フレーム
20a フレームウェブ面
20b フレーム下面
L0 フレーム下面部からのステー本体の車両上下方向長さ
L1 ステー本体開口部長さ
W0 ステー本体の平均幅
W1 ステー本体開口部の平均幅
h ステー本体とステー補強体で形成される閉断面の高さ
h1 開口部丸部から延伸した壁面部の高さ
L 車両前後方向
W 車両幅方向
V 車両上下方向
Claims (8)
- ビーム及びフレーム間を接続するステー本体と、
前記ステー本体を車両幅方向の外側から補強するステー補強体と、
前記ステー補強体及び前記ビーム間に設けられたガセットと、を備え、
前記ステー本体のステー本体ウェブ面に開口部が設けられ、
前記開口部の車両前後方向の両端から車両幅方向外側に向かって延設された一対の壁面部が互いに対向するように設けられ、
前記各壁面部は、前記ガセットの設置位置に対応する高さに設けられ、前記ステー補強体の車両幅方向内側の面に当接されている
ことを特徴とするアンダーランプロテクターの支持構造。 - 前記開口部は、互いに対向する一対の直辺部と互いに対向する一対の丸部から構成される略角丸四角形の形状を有し、前記各直辺部の両方から車両幅方向外側に向かって延設された前記各壁面部が前記ステー補強体の車両幅方向内側の面に当接されている
ことを特徴とする請求項1に記載のアンダーランプロテクターの支持構造。 - 前記壁面部が、前記ステー本体ウェブ面を折り曲げて形成されていることを特徴とする請求項1又は2に記載のアンダーランプロテクターの支持構造。
- 前記開口部の長さL1(mm)と、前記開口部の平均幅W1(mm)と、前記フレーム下面のフランジからの前記ステー本体の長さL0(mm)と、前記ステー本体の平均幅W0(mm)と、前記ステー本体と前記ステー補強体で形成される閉断面の車両幅方向の高さh(mm)との関係が、0.5≦L1/L0≦0.8、および、2×h≦W1≦0.85×W0を満たすことを特徴とする請求項2又は3に記載のアンダーランプロテクターの支持構造。
- 前記丸部の車両幅方向外側の面から車両幅方向外側に向かって延設された壁面部の高さh1が5mm≦h1≦15mmであることを特徴とする請求項2~4のいずれか一項に記載のアンダーランプロテクターの支持構造。
- 前記ステー補強体の車両上下方向両端から車両幅方向内側に向かって延設されたステー補強体の上下面部が設けられ、前記上下面部が前記ステー本体に当接されていることを特徴とする請求項1~5のいずれか一項に記載のアンダーランプロテクターの支持構造。
- 前記フレームは、鉛直に配向されたフレームウェブ面と、前記フレームウェブ面の下端から車両幅方向外側に向かって延設されたフレーム下面のフランジとを有し、
前記ステー本体は、前記フレームウェブ面および前記フランジで固定されている
ことを特徴とする請求項1~6のいずれか一項に記載のアンダーランプロテクターの支持構造。 - 前記ステー本体と前記ステー補強体が780MPa級以上の強度を有する鋼板からなることを特徴とする請求項1~7のいずれか一項に記載のアンダーランプロテクターの支持構造。
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KR1020197005161A KR102202275B1 (ko) | 2016-08-26 | 2017-08-24 | 언더런 프로텍터의 지지 구조 |
US16/327,089 US10787142B2 (en) | 2016-08-26 | 2017-08-24 | Supporting structure for underrun protector |
JP2017559472A JP6274382B1 (ja) | 2016-08-26 | 2017-08-24 | アンダーランプロテクターの支持構造 |
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US20190184924A1 (en) | 2019-06-20 |
US10787142B2 (en) | 2020-09-29 |
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