JP2017030550A - Front under-run protector stay - Google Patents

Abstract

PROBLEM TO BE SOLVED: To flexibly correspond to a vehicle having a different vehicle height while securing support rigidity of a front under-run protector.SOLUTION: One of an upper side part and a lower side part (a stay first lateral plate part 54) of a cylindrical stay main body 49 extending in a longitudinal direction inclines with respect to the longitudinal direction in a stay-mounting state that a stay rear plate part 57 is fixed on a vehicle body side so that a center height Hf of a front end surface of the stay main body which a front end edge part of the stay main body 49 defines on an inner side, and a center height Hr of a rear end surface of the stay main body which a rear end edge part of the stay main body 49 defines on the inner side are different, and a region in which the front end surface of the stay main body and the rear end surface of the stay main body overlap in the longitudinal direction is included.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a front underrun protector stay for fixing a front underrun protector to a vehicle body side.

  Patent Document 1 describes a structure in which a chassis-side bracket fixed to a vehicle body frame and a bumper-side bracket fixed to a front under-run protector are coupled to fix the front under-run protector to the chassis. The chassis side bracket extends in the vertical direction of the vehicle, and the bumper side bracket extends in the longitudinal direction of the vehicle. The chassis side bracket and the bumper side bracket are provided with a plurality of bolt insertion holes with different positions in the vertical direction in the vehicle width direction, and the chassis side bracket and the bumper side bracket are fixed by bolts that pass through the insertion holes. Since a plurality of sets of insertion holes are provided so that the positions are different in the vertical direction, the mounting height of the front underrun protector can be adjusted. In Patent Document 1, a chassis-shaped bracket in the shape of a plate is shown.

JP 2008-62761 A

  In the above configuration, a shear load acts on the bolt that connects the chassis side bracket and the bumper side bracket at the time of a frontal collision of the vehicle. Therefore, if the input impact load increases, the bolt breaks and the front underrun protector falls off. there's a possibility that. In addition, since the chassis side bracket has a plate shape, depending on the input direction of the impact load, the chassis side bracket may be deformed to impair the function of the front underrun protector.

  Therefore, an object of the present invention is to provide a front underrun protector stay that can flexibly cope with vehicles having different vehicle heights while ensuring the support rigidity of the front underrun protector.

  In order to achieve the above object, a first aspect of the present invention is a front underrun protector stay for fixing a front underrun protector extending in the vehicle width direction at the front end of a vehicle to the vehicle body side, A stay front plate and a stay rear plate are provided.

  The stay body has a cylindrical shape extending in the front-rear direction. The stay front plate portion is fixed to the front end edge portion of the stay main body, crosses the front and rear direction, and is fixed to the rear surface side of the front underrun protector. The stay rear plate portion is fixed to the rear end edge portion of the stay main body, crosses the front and rear direction, and is fixed to the vehicle body side. At least one of the upper part or the lower part of the stay body is a stay mounting state in which the stay rear plate part is fixed to the vehicle body side, and the center height and the rear edge part of the front end surface of the stay body that the front edge part divides inside. Is inclined with respect to the front-rear direction so that the center height of the rear end surface of the stay main body partitioning inward is different and the front end surface of the stay main body and the rear end surface of the stay main body overlap each other in the front-rear direction.

  In the above configuration, the stay front plate that intersects with the front-rear direction is fixed to the rear side of the front underrun protector, and the stay rear plate that intersects with the front-rear direction is fixed to the vehicle body side. For this reason, for example, even when the stay front plate and the stay rear plate are fastened and fixed to the rear side of the front under-run protector and the vehicle body by bolts, excessive shear load is applied to the bolt at the time of frontal collision of the vehicle. Is less likely to act, and the fall of the front underrun protector due to the breakage of the bolt can be suppressed.

  The stay body has a cylindrical shape extending in the front-rear direction, and at least one of the upper part or the lower part of the stay body has a center height of the stay body front end surface and a center height of the stay body rear end surface when the stay is attached. And the stay body front end surface and the stay body rear end surface are inclined with respect to the front-rear direction so as to have a region overlapping in the front-rear direction. However, the stay main body is not easily deformed, and the front underrun protector can function reliably.

  Further, at least one of the upper part or the lower part of the stay main body has a center height of the stay main body front end surface different from a center height of the stay main body rear end surface in the stay mounted state, and the stay main body front end surface and the stay main body rear end surface. Is inclined with respect to the front-rear direction so that it has a region overlapping in the front-rear direction, so when fixing the stay front plate part and the stay rear plate part to the stay main body, by reversing and fixing the stay main body, The relative height between the stay front plate portion and the stay rear plate portion can be changed, so that the vehicle can be flexibly adapted to vehicles having different vehicle heights.

  A second aspect of the present invention is the front under-ramp protector stay of the first aspect, wherein the stay main body rear end surface has a larger area than the stay main body front end surface, and substantially the entire area of the stay main body front end surface is the stay. It overlaps with the rear end face of the main body in the front-rear direction.

  In the above configuration, the area of the rear end surface of the stay main body is larger than the front end surface of the stay main body, and substantially the entire area of the front end surface of the stay main body overlaps with the rear end surface of the stay main body in the front-rear direction. It is possible to more reliably suppress the deformation of the stay body when acting.

  According to the present invention, it is possible to flexibly cope with vehicles having different vehicle heights while ensuring the support rigidity of the front underrun protector.

It is the perspective view which looked at the vehicle provided with the front under-run protector stay which concerns on one Embodiment of this invention from front diagonally upward. It is the perspective view which looked at FIG. 1 from back diagonally downward. It is a side view of FIG. It is the perspective view which looked at the front under-run protector stay of FIG. 1 from front diagonally upward. It is the perspective view which looked at FIG. 4 from back diagonally downward. It is a side view of a front underrun protector stay, (a) shows the form in the case of using for vehicles with high vehicle height, (b) shows the form in the case of using for vehicles with low vehicle height, respectively. It is a front view of a stay main body.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the figure, the arrow FR indicates the front of the vehicle 1, UP indicates the upper side, and IN indicates the inner side in the vehicle width direction. In the following description, the front-rear direction means the front-rear direction of the vehicle 1, and the left-right direction means the left-right direction with the vehicle 1 facing forward.

  The vehicle 1 of the present embodiment is a cab-over type vehicle in which a cab (not shown) is positioned in front of an engine (not shown). As shown in FIGS. 1 to 3, a front underrun for restraining a partner vehicle from entering under the vehicle 1 at the time of a collision with a passenger vehicle having a vehicle height lower than that of the vehicle 1 is provided at a lower portion of the front end of the vehicle 1. A protector (FUP) 10 is provided. The FUP 10 is fixed to the vehicle body frame 3 of the vehicle 1 and extends in the vehicle width direction.

  A suspension bracket 4, a reinforcing plate 5, a leaf suspension 6, an FUP support bracket (protector support bracket) 7, an under member 8 and the like are provided on the vehicle body frame 3 side around the front end portion of the vehicle body frame 3, and on the FUP 10 side. A stay (front under-run protector stay) 9 and the like are provided. The mounting structure 2 of the FUP 10 includes a suspension bracket 4, an FUP support bracket 7, a stay 9, etc. in addition to the FUP 10 and the vehicle body frame 3, and the stay 9 fixed to the FUP 10 is fixed to the vehicle body frame 3. Fastened to the bracket 7. The mounting structure 2 is provided symmetrically on the left and right of the vehicle 1, and the left and right stays 9 and the FUP support bracket 7 support the left and right sides of the FUP 10. Since the left and right sides of the front end portion of the body frame 3 are configured in substantially the same manner, the left side will be described below, and the description on the right side will be omitted.

  The body frame 3 includes a pair of left and right side members 11, a cross member 12, and the like. The side members 11 extend in the front-rear direction on both sides in the vehicle width direction, and the front end portions of the left and right side members 11 are connected by the cross members 12. Each side member 11 has a U-shaped cross section that opens to the inner side in the vehicle width direction. The side member side plate 13 extends substantially vertically and extends in the front-rear direction, and the upper side edge and the lower side edge of the side member side plate part 13 respectively. A side member upper plate portion 14 and a side member lower plate portion 15 which are bent inward in the width direction and face each other are integrally provided.

  The suspension bracket 4 is provided on each of the left and right sides. Each suspension bracket 4 extends in the front-rear direction below the front side of the side member 11 and is fastened to the lower side of the side member lower plate portion 15 by a plurality of bolts 16 and nuts 17 screwed into the bolts 16 from below. Fixed. The suspension bracket 4 has a U-shaped cross section that opens to the lower side. The suspension bracket upper plate portion 18 extends back and forth so as to be parallel to the side member lower plate portion 15, and the left end edge and the right end of the suspension bracket upper plate portion 18. The suspension bracket outer plate portion 19 and the suspension bracket inner plate portion 20 are integrally formed by bending downward from the edge and facing each other. The plurality of bolts 16 are arranged in a straight line in the front-rear direction.

  The reinforcing plate 5 is provided on each of the left and right sides. Each reinforcing plate 5 includes a plurality of bolts 21 and nuts 22 screwed into the bolts 21 from the inside in the vehicle width direction so that the side members 11 and the suspension bracket 4 stand substantially vertically on the outside in the vehicle width direction. The side member side plate portion 13 is fastened and fixed to the outside in the vehicle width direction. The reinforcing plate 5 includes a fastening and fixing part 23 that is fastened and fixed to the side member side plate part 13, a reinforcing part 24 that covers a part of the suspension bracket outer plate part 19 on the outer side in the vehicle width direction, and a fastening and fixing part 23 and a reinforcing part 24. And a projecting portion 25 projecting outward in the vehicle width direction at the center of the vehicle. The plurality of bolts 21 are arranged at six locations, that is, two locations on the fastening and fixing portion 23 on the front side of the protruding portion 25 and four locations on the fixing portion 23 on the rear side of the protruding portion 25.

  The leaf suspension 6 is provided on each of the left and right sides. Each leaf suspension 6 has a configuration in which a plurality of long plates of different lengths are stacked one above the other, and extends in the front-rear direction below the side member 11 with a space between the side members 11. Be placed. The front end portion of the leaf suspension 6 is disposed between the suspension bracket outer plate portion 19 and the suspension inner plate portion 20 and is supported by being fastened and fixed to the suspension bracket 4 by bolts 26 or the like.

  The FUP support brackets 7 are provided on the left and right, respectively. Each FUP support bracket 7 is disposed below the suspension bracket 4, and a plurality of bolts 27, 28 and nuts (not shown) screwed into the bolts 27, 28 are arranged on the front side of the suspension bracket 4 in the vehicle width direction. It is fastened and fixed. That is, the FUP support bracket 7 is fixed to the side member 11 via the suspension bracket 4 behind the FUP 10 and supports the FUP 10 from the rear via the stay 9.

  The FUP support bracket 7 includes an FUP bracket outer plate portion 30 that stands substantially vertically outside the suspension bracket outer plate portion 19 in the vehicle width direction and an FUP bracket that stands substantially vertically inside the suspension bracket inner plate portion 20 in the vehicle width direction. The inner plate portion 31, the FUP bracket outer plate portion 30 and the FUP bracket inner plate portion 31 are welded and fixed to the lower end edges of the inner member 31 and extend in the vehicle width direction, and the inside of the FUP bracket outer plate portion 30 and the FUP bracket. A stay mounting surface 33 is fixed to each front end edge of the plate portion 31 by welding and extends in the vehicle width direction so as to face the FUP 10.

  The FUP bracket outer plate portion 30 integrally includes an outer plate fixing portion 34 fastened and fixed to the suspension bracket outer plate portion 19 and an outer plate extending portion 35 extending downward from the outer plate fixing portion 34. The FUP bracket outer plate portion 30 is fastened and fixed to the front side of the suspension bracket outer plate portion 19 by a plurality of bolts 27 and nuts (not shown) screwed into the bolts 27 from the inner side in the vehicle width direction. The plurality of bolts 27 are arranged at four locations on the outer plate fixing portion 34.

  The FUP bracket inner plate portion 31 integrally includes an inner plate fixing portion 36 fastened and fixed to the suspension bracket inner plate portion 20 and an inner plate extending portion 37 extending downward from the inner plate fixing portion 36. The FUP bracket inner plate portion 31 is fastened and fixed to the front side of the suspension bracket inner plate portion 20 by a plurality of bolts 28 and nuts (not shown) screwed to these bolts 28 from the outside in the vehicle width direction. The plurality of bolts 28 are arranged at two locations on the inner plate fixing portion 36.

  The under member mounting surface 32 is fastened and fixed to the end of the under member 8 in the vehicle width direction by a plurality of bolts 38 and 39 and a nut 40 screwed to the bolts 38 and 39.

  The stay mounting surface 33 is fastened and fixed to a later-described stay rear end member 50 of the stay 9 by a plurality of bolts 41 and a nut 43 that is screwed into the bolts 41 from behind with a plurality of bolts 41 interposed therebetween.

  The under member 8 extends along the vehicle width direction below the left and right FUP support brackets 7 and is fastened and fixed to the FUP support bracket 7 by a plurality of bolts 38 and 39 and nuts 40 screwed into the bolts 38 and 39. As a result, the left and right FUP support brackets 7 are connected.

  The under member 8 is a rectangular tube having a rectangular cross section that opens at both ends in the vehicle width direction. The under member upper plate portion 44 is parallel to the under member mounting surface 32 of the FUP support bracket 7, and the front end edge and the rear end of the under member upper plate portion 44. An under member front plate portion 45 and an under member rear plate portion 46 that extend downward from the end edges and face each other, and an under member upper plate portion 44 that extends from the lower end edge of the under member front plate portion 45 to the lower end edge of the under member rear plate portion 46. An under member lower plate portion 47 facing each other is integrally provided.

  The under member upper plate portion 44 is longer in the vehicle width direction than the under member lower plate portion 47 and extends to both sides in the vehicle width direction. The under member upper plate portion 44 is fastened and fixed to the under member mounting surface 32 of the FUP support bracket 7 by a plurality of bolts 38 and nuts 40 screwed into the bolts 38 from below. The plurality of bolts 38 are disposed at two locations on the outer member mounting surface 32 on the outer side in the vehicle width direction than the FUP bracket outer plate portion 30.

  The under member lower plate portion 46 is fastened and fixed to the under member mounting surface 32 of the FUP support bracket 7 by a plurality of bolts 39 and nuts (not shown) screwed into the bolts 39 from above. The plurality of bolts 39 are disposed at two locations on the outer side of the under member lower plate portion 47 in the vehicle width direction.

  The stays 9 are respectively provided on the left and right sides to fix the FUP 10 to the side member 11 via the suspension bracket 4 and the FUP support bracket 7. Each stay 9 is disposed in front of the FUP support bracket 7, and is fastened and fixed to the front side of the FUP support bracket 7 by a plurality of bolts 41 and a nut 43 that is screwed into the bolts 41 from behind through a plurality of bolts 41. The

  As shown in FIGS. 1 to 5, the stay 9 is fastened and fixed to the FUP 10 via the stay front plate 48 and the stay front plate 48 that stands substantially perpendicular to the front-rear direction behind the FUP 10, and supports the FUP. A stay main body 49 extending rearward toward the bracket 7 and a stay rear end member 50 fixed to the rear end portion of the stay main body 49 and fastened and fixed to the FUP support bracket 7 are provided.

  A front end edge portion of the stay main body 49 is fixed to the rear surface of the stay front plate portion 48 by welding. A plurality of bolt insertion holes 70 are formed in the stay front plate portion 48. The stay front plate portion 48 includes a plurality of bolts 51 inserted through the respective bolt insertion holes 70 and nuts 52 screwed into the bolts 51 from the rear. Is fastened and fixed to the rear side of the FUP 10.

  The stay main body 49 is a rectangular tube (rectangular cylindrical shape extending in the front-rear direction) with a rectangular cross section that opens at both front and rear ends, and a pair of left and right stay side wall parts 53 that stand up and oppose each other in the front-rear direction. The first stay horizontal plate 54 (upper portion of the stay main body 49) 54 extending from one upper edge of the stay side wall 53 to the other upper edge, and the lower edge of the left and right stay side walls 53 from one lower edge to the other lower edge. And a stay second horizontal plate portion (lower portion of the stay main body 49) 55 integrally with the stay first horizontal plate portion 54.

  The stay rear end member 50 integrally includes a stay rear plate portion 57 and a stay rear end flange portion 58. The stay rear plate portion 57 stands substantially orthogonal to the front-rear direction, and the rear end edge portion of the stay main body 49 is fixed to the front surface of the stay rear plate portion 57 by welding. The stay rear plate portion 57 is formed with a plurality of bolt insertion holes 71 through which the plurality of bolts 41 are respectively inserted. The stay rear plate portion 57 is in surface contact with the stay mounting surface 33 of the FUP support bracket 7 from the front, and a plurality of bolts 41 and a nut 43 that is screwed into the bolts 41 from the rear with the washers 42 interposed therebetween. The left and right stay fastening portions 56 spaced apart in the width direction are fastened and fixed to the stay mounting surface 33. The stay rear end flange portion 58 extends forward from the stay rear plate portion 57 between the left and right stay fastening portions 56.

  The stay rear end flange portion 58 includes a pair of left and right flange side portions 59 that stand up and face each other in the front-rear direction on the outside of the left and right stay side wall portions 53 in the stay main body 49, and an upper end edge of the left and right flange side portions 59 It has a U-shaped cross section that integrally has a flange upper surface portion 61 that connects each other and opens downward. A flange upper surface reinforcing plate 60 that is bent forward and is welded and fixed from below is integrally formed at the upper end portion of the stay rear plate portion 57, and the flange upper surface portion 61 is reinforced by the flange upper surface reinforcing plate 60. The

  The rear end portion of the stay main body 49 is inserted between the left and right flange side surface portions 59 of the stay rear end member 50, and each of the left and right flange side surface portions 59 is fixed to the left and right stay side wall portions 53 by welding.

  As shown in FIGS. 6 (a) and 7, the stay first horizontal plate portion 54 of the stay main body 49 extends obliquely rearward and upward with the stay 9 fixed to the vehicle body side. The plate part 55 extends along the front-rear direction. For this reason, the center height Hf of the stay main body front end surface 72 defined by the front end edge of the stay main body 49 on the inner side is equal to the center height Hr of the stay main body rear end surface 73 defined by the rear end edge of the stay main body 49 on the inner side. Lower than. Further, the stay main body front end surface 72 and the stay main body rear end surface 73 have regions overlapping in the front-rear direction. In the present embodiment, the stay main body rear end surface 73 has a larger area than the stay main body front end surface 72, and substantially the entire area of the stay main body front end surface 72 overlaps the stay main body rear end surface 73 in the front-rear direction.

  As described above, in this embodiment, both the stay front plate portion 48 and the stay rear plate portion 57 stand substantially orthogonal to the front-rear direction, and the stay front plate portion 48 and the stay rear plate portion 57 are fastened and fixed, respectively. Since the shafts of the bolts 51 and 41 to be extended extend in the front-rear direction, it is difficult for an excessive shear load to act on the bolts 51 and 41 at the time of a frontal collision of the vehicle, and it is possible to suppress the drop-off of the FUP 10 due to breakage of the bolts 51 and 41. it can.

  The stay main body 49 has a cylindrical shape extending in the front-rear direction. The stay second horizontal plate portion 54 of the stay main body 49 has a center height Hf of the stay main body front end surface 72 and the stay main body rear end surface 73 in the stay mounted state. And the stay main body front end surface 72 and the stay main body rear end surface 73 are inclined with respect to the front-rear direction so as to have a region overlapping in the front-rear direction. The stay body 49 is not easily deformed even when acting in a tilted manner, so that the FUP 10 can function reliably.

  Further, the stay main body rear end surface 73 has a larger area than the stay main body front end surface 72, and substantially the entire area of the stay main body front end surface 72 overlaps with the stay main body rear end surface 73 in the front-rear direction. Therefore, it is possible to more reliably suppress the deformation of the stay main body 49 when acting by tilting.

  Further, the stay first horizontal plate portion 54 extends in the front-rear direction and the stay second horizontal plate portion 55 is inclined with respect to the front-rear direction, so that the stay main plate 49 has a stay front plate portion 48 and a stay rear plate portion 57. At the time of fixing, the stay front plate portion 48 and the stay rear plate portion 57 are not reversed, but only the stay main body 49 is reversed and fixed to the stay front plate portion 48 and the stay rear plate portion 57, so that the front of the stay is fixed. The relative heights of the plate portion 48 and the stay rear plate portion 57 can be changed. For example, when the stay first horizontal plate portion 54 is on the upper side as shown in FIG. 6A, the center height Hf of the stay main body front end surface 72 is lower than the center height Hr of the stay main body rear end surface 73. On the other hand, when the stay first horizontal plate portion 54 is on the lower side as shown in FIG. 6B, the center height Hf of the stay main body front end surface 72 is equal to the stay main body rear end surface 73. It becomes higher than the center height Hr. In the case of a vehicle having a high vehicle height, as shown in FIG. 6A, the stay first horizontal plate portion 54 is formed as an upper portion extending obliquely rearward and upward, and the stay second horizontal plate portion 55 is extended substantially horizontally. The lower part. In the case of a vehicle with a low vehicle height, as shown in FIG. 6 (b), the stay main body 49 is reversed from the case of a vehicle with a high vehicle height, and the stay second horizontal plate portion 55 is set as an upper portion extending substantially horizontally. The stay first horizontal plate portion 54 is a lower portion extending obliquely rearward and downward. Accordingly, it is possible to flexibly cope with vehicles having different vehicle heights.

  As mentioned above, although the embodiment to which the invention made by the present inventor is applied has been described, the present invention is not limited by the discussion and the drawings that form part of the disclosure of the present invention according to this embodiment. That is, it should be added that other embodiments, examples, operation techniques, and the like made by those skilled in the art based on this embodiment are all included in the scope of the present invention.

  For example, in the above embodiment, the stay main body 49 has a rectangular cylindrical shape, but may have other shapes (for example, a cylindrical shape).

  Moreover, you may incline both the upper part (for example, stay 1st horizontal board part 54) and lower part (for example, stay 2nd horizontal board part 55) of the stay main body 49 with respect to the front-back direction.

  The front underrun protector stay of the present invention can be used for trucks and other vehicles.

DESCRIPTION OF SYMBOLS 1 Vehicle 2 Front underrun protector mounting structure 3 Body frame 7 FUP support bracket 9 Stay (front underrun protector stay)
10 Front underrun protector (FUP)
33 Stay mounting surface 48 Stay front plate portion 49 Stay body 50 Stay rear end member 53 Stay side wall portion 54 Stay first horizontal plate portion 55 Stay second horizontal plate portion 56 Stay fastening portion 57 Stay rear plate portion 58 Stay rear end flange portion 72 Front end surface of stay body 73 Rear end surface of stay body

Claims (2)

A front underrun protector stay for fixing a front underrun protector extending in the vehicle width direction at the front end of the vehicle to the vehicle body side,
A stay body having a cylindrical shape extending in the front-rear direction;
A stay front plate fixed to the front edge of the stay body and crossing in the front-rear direction, and fixed to the rear surface side of the front underrun protector,
A stay rear plate portion fixed to the rear end edge portion of the stay main body and crossing in the front-rear direction, and fixed to the vehicle body side,
At least one of the upper part or the lower part of the stay body is a stay attached state in which the stay rear plate part is fixed to the vehicle body side, and the center height of the stay body front end surface that the front end edge section defines on the inside. With respect to the front-rear direction, the center height of the rear end surface of the stay main body that the rear end edge section defines on the inside is different, and the stay main body front end surface and the stay main body rear end surface overlap each other in the front-rear direction. Front underrun protector stay, characterized by tilting. A front underrun protector stay according to claim 1,
A front under-run protector stay characterized in that the stay main body rear end surface has a larger area than the stay main body front end surface, and substantially the entire area of the stay main body front end surface overlaps the stay main body rear end surface in the front-rear direction.

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