JP2009292175A - Structure for mounting towing hook - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a structure for mounting a towing hook capable of suppressing deformation of a towing hook mounting member while suppressing an increase in weight. <P>SOLUTION: A front side member 12 is arranged on both sides of a vehicle 10, and a plate member 14 is arranged in the front end of the front side member 12. A bumper arm 26 is arranged on the vehicle rear side of a bumper reinforcement 24. A bracket 18 is sandwiched between the connected part 26C of the bumper arm 26 and the connected part 14A of the plate member 14, and the bumper arm 26 and the plate member 14 are co-fastened. In the bracket 18, a nut 20 is fixed along the vehicle longitudinal direction, and the towing hook 30 is passed through the through-holes 28A, 28B of the bumper reinforcement 24 and the through-hole 28C of the bumper arm 26. The male screw part 30C of the towing hook 30 is screwed in the female screw part 20C of the nut 20. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a tow hook attaching structure for attaching a tow hook to a front end portion or a rear end portion of a vehicle.

In Patent Document 1 below, a plate-like hook attachment member for attaching a traction hook between a tubular side member and a bumper stay, with a tubular bumper stay penetrating through holes formed in the front and rear walls of the bumper reinforcement. An attachment structure of a detachable tow hook with a pinch interposed therebetween is disclosed.
JP 2008-37220 A

  However, in the case of the above prior art, the structure is such that the tubular bumper stay and the tubular side member sandwich the outer peripheral portion of the hook mounting member and are tightened with bolts at the outer peripheral edge of the hook mounting member. In order to transmit the load input through the hook to the side member, the strength of the central portion of the hook mounting member is required, which becomes heavier due to an increase in the plate thickness or the like.

  An object of the present invention is to obtain a tow hook attachment structure that can suppress deformation of the hook attachment member while suppressing an increase in weight in consideration of the above fact.

  The tow hook mounting structure according to the first aspect of the present invention is provided at the ends of a pair of left and right vehicle body skeleton members disposed along the vehicle front-rear direction on both sides in the vehicle width direction at the vehicle body front portion or vehicle body rear portion. A vehicle body side mounting member provided with a side joint surface and a bumper member spanned between the end portions of the pair of left and right body frame members, and a bumper side joint surface serving as a fixing portion to the vehicle body side joint surface A bumper side mounting portion provided, and a tow hook inserted from the outside of the vehicle body into a through hole formed coaxially in the bumper member and the bumper side mounting portion, and having an external thread formed on the outer peripheral surface of the insertion side end portion A mounting portion fastened together with the vehicle body side mounting member and the bumper side mounting portion while being sandwiched between the vehicle body side joint surface and the bumper side joint surface, and the through hole when viewed in the vehicle front-rear direction. And is provided at a position overlapping with A nut portion to which a male screw of a pull hook is screwed, and a load receiving portion that forms a peripheral portion of the nut portion and is held in a state of being sandwiched between the vehicle body side mounting member and the bumper side mounting portion. And a tow hook mounting member configured to include.

  According to a second aspect of the present invention, in the traction hook mounting structure according to the first aspect, in the mounted state of the traction hook mounting member, the nut portion is disposed closer to the vehicle body side mounting member than the bumper side joining surface. It is characterized by that.

  According to a third aspect of the present invention, in the traction hook mounting structure according to the first or second aspect, the through hole can contact the traction hook by a load acting in a direction crossing an axial direction of the traction hook. It is characterized by its size.

  A fourth aspect of the present invention is the tow hook mounting structure according to any one of the first to third aspects, wherein the bumper member is arranged along a vehicle width direction, and the bumper side The attachment portions are bumper arms provided at both ends of the bumper reinforcement in the vehicle width direction.

  According to the first aspect of the present invention, the vehicle body side mounting member provided with the vehicle body side joint surface is provided at the ends of the pair of left and right vehicle body skeleton members, and between the ends of the pair of left and right vehicle body skeleton members. A bumper-side mounting portion having a bumper-side joint surface is provided on the bumper member that is bridged. With the tow hook mounting member sandwiched between the vehicle body side joint surface and the bumper side joint surface, the mounting portion of the tow hook mounting member is fastened together with the vehicle body side mounting member and the bumper side mounting portion. A load receiving portion constituting a peripheral portion of the nut portion provided on the member is held in a state of being sandwiched between the vehicle body side mounting member and the bumper side mounting portion. Further, the tow hook is inserted from the outside of the vehicle body into a through hole formed coaxially in the bumper member and the bumper side mounting portion, and the male screw formed on the outer peripheral surface of the insertion side end portion of the tow hook overlaps with the through hole. It is screwed into a nut portion provided at the position. As a result, when an input (tension or compression) in the axial direction of the traction hook is entered when the traction hook is used, the attachment portion is held in a state where the traction hook attachment member is sandwiched between the vehicle body side joint surface and the bumper side joint surface. Since it is fastened together with the vehicle body side mounting member and the bumper side mounting portion, the traction hook mounting member is supported by the vehicle body side mounting member when a compression load is input, and the traction hook mounting member is attached to the bumper side mounting portion when a tensile load is input. Supported. Therefore, the deformation of the tow hook mounting member can be suppressed, and a load is also applied to the vehicle body side mounting member on the opposite side in the vehicle width direction through the bumper member through the fastening portion of the jointed bumper side mounting portion. Can communicate. Therefore, deformation of the tow hook mounting member can be suppressed while suppressing an increase in the weight of the tow hook mounting member. In particular, when the vehicle body side mounting member or the vehicle body skeleton member is made of a material with low material strength such as aluminum or a composite material, the load can be distributed and transmitted to secure the strength of the tow hook mounting member. It is effective for.

  According to the second aspect of the present invention, when the tow hook mounting member is mounted, the nut portion is disposed closer to the vehicle body side mounting member than the bumper side joint surface. Inhibiting can be suppressed. That is, the deformation stroke of the bumper member can be ensured when the vehicle collides.

  According to the third aspect of the present invention, the through-holes provided in the bumper member and the bumper-side mounting portion are sized so that the traction hook can be contacted by a load acting in a direction intersecting the axial direction of the traction hook. Therefore, when the tow hook is deformed in the load acting direction due to a load acting in a direction intersecting the axial direction of the tow hook when the tow hook is used, the tow hook becomes an edge of the through hole provided in the bumper member and the bumper side mounting portion. Contact the part. Thereby, while being able to reduce the deformation amount of the front end side of a tow hook, a load can be disperse | distributed by a bumper member and a bumper side attaching part.

  According to the fourth aspect of the present invention, the bumper member is a bumper reinforcement arranged along the vehicle width direction, and the bumper-side mounting portions are bumper arms provided at both ends of the bumper reinforcement in the vehicle width direction. For example, even when the bumper reinforcement is formed in a curved shape on both sides in the vehicle width direction, the tow hook mounting member is sandwiched between the vehicle body side joint surface of the vehicle body side mounting member and the bumper side joint surface of the bumper arm. It can be fastened together with the vehicle body side mounting member and the bumper arm.

  As described above, the tow hook mounting structure according to the first aspect of the present invention has an excellent effect of suppressing deformation of the tow hook mounting member while suppressing an increase in weight.

  The tow hook mounting structure according to the second aspect of the present invention has an excellent effect that it is possible to suppress the deformation of the bumper member during a vehicle collision.

  The tow hook mounting structure according to the third aspect of the present invention can reduce the amount of deformation on the tip side of the tow hook and can also distribute the load using the bumper member and the bumper side mounting portion. Has an excellent effect.

  According to a fourth aspect of the present invention, there is provided the tow hook mounting structure according to the present invention, even when the bumper reinforcement is formed in a curved shape on both sides in the vehicle width direction, the vehicle body side joint surface of the vehicle body side mounting member and the bumper side joint surface of the bumper arm. The tow hook attaching member can be sandwiched and attached between the two, and it has an excellent effect that the degree of freedom of application can be increased.

[First Embodiment]
Hereinafter, a first embodiment of a tow hook mounting structure according to the present invention will be described with reference to FIGS. In these drawings, an arrow FR appropriately shown indicates the vehicle front side, an arrow UP indicates the vehicle upper side, and an arrow OUT indicates the vehicle width direction outer side.

  FIG. 1 shows a longitudinal sectional view of the entire configuration of the tow hook mounting structure according to the present embodiment, and FIG. 2 shows a transverse sectional view of the entire structure of the tow hook mounting structure. FIG. 3 shows an exploded perspective view of the overall structure of the tow hook mounting structure. As shown in these drawings, front side members 12 extending along the vehicle front-rear direction are disposed on both sides of the front portion (the front portion of the vehicle body) of the vehicle 10 (FIGS. 1 to 1). 3 shows only one end in the vehicle width direction). The front side member 12 is a cylindrical body frame member, and a cross section along the vehicle width direction is formed in a substantially rectangular shape. A plate member 14 as a vehicle body side attachment member is joined to the front side of the front end portion 12A of the front side member 12 by welding or the like. The plate member 14 includes a joint portion 14A as a vehicle body side joint surface formed in a planar shape along the vehicle vertical direction and the vehicle width direction. Further, the plate member 14 includes a bent portion 14B bent to the front end portion 12A side (vehicle rear side) of the front side member 12 at the upper end portion of the joint portion 14A, and the front end of the front side member 12 from an intermediate portion of the joint portion 14A. A horizontal wall portion 14C extending toward the portion 12A (vehicle rear side), and a slope portion 14D disposed obliquely from the end of the horizontal wall portion 14C to the lower end portion of the joint portion 14A. The plate member 14 has the bent portion 14B in surface contact with the upper portion of the front end portion 12A of the front side member 12, and the lateral wall portion 14C in surface contact with the lower portion of the front end portion 12A of the front side member 12. It is joined to the front end portion 12 </ b> A of the side member 12. An oval opening 16 is formed in the joint portion 14 </ b> A inside the portion surrounded by the front side member 12. The long side of the opening 16 is arranged along the vehicle vertical direction.

  A bumper arm 26 as a bumper side mounting portion is disposed on the vehicle front side of the plate member 14 with a bracket 18 as a traction hook mounting member to be described later interposed therebetween. Further, a bumper as a bumper member is disposed on the vehicle front side of the bumper arm 26. Reinforce 24 is provided. The bumper reinforcement 24 is disposed at the front end of the vehicle and extends along the vehicle width direction. The bumper arms 26 are provided at both ends of the bumper reinforcement 24 on the vehicle rear side in the vehicle width direction. A bumper absorber and a front bumper cover are disposed on the front side of the bumper reinforcement 24. The bumper reinforcement 24 has a cross section along the longitudinal direction (vehicle up-down direction) in the vehicle front-rear direction formed in a substantially “day” shape, and the front wall 24A and the rear wall that are spaced apart from each other in the vehicle front-rear direction. 24B is formed in a curved surface shape so as to protrude toward the center in the vehicle width direction (see FIG. 3). The bumper arm 26 is formed in a substantially trapezoidal shape around the cross section along the lateral direction (vehicle width direction), and two vertical walls 26A are bridged along the vehicle longitudinal direction inside the bumper arm 26 (FIG. 2). The bumper arm 26 has a vertical wall portion 26B disposed obliquely along the rear wall 24B of the bumper reinforcement 24 at the front end portion, and a planar shape as a bumper side joint surface disposed along the vehicle vertical direction at the rear end portion. 26C, and the vertical wall portion 26B extends on both sides in the vehicle width direction. Through holes 28A, 28B, and 28C through which the traction hook 30 passes are formed in the front wall 24A and the rear wall 24B of the bumper reinforcement 24 and the vertical wall portion 26B and the joint portion 26C of the bumper arm 26 at positions along the vehicle longitudinal direction. , 28D are formed. The bumper reinforcement 24 and the bumper arm 26 are formed of an extruded material made of aluminum alloy, and these are integrated in advance by bolts or welding.

  The tow hook 30 is composed of a rod-like member having a circular cross section disposed along the vehicle front-rear direction, and an annular hook portion 30A is formed at the front end portion. A small diameter portion 30B having a smaller diameter than the shaft diameter on the front end side is formed at the rear end portion of the pulling hook 30, and a male screw portion 30C is provided on the outer peripheral surface of the rear end portion of the small diameter portion 30B. That is, the traction hook 30 is a screw-in type hook that is attached by screwing the male screw portion 30C to a nut 20 described later.

  The bracket 18 described above is made of a plate-like member arranged in the vehicle vertical direction, and a nut 20 for attaching a tow hook is provided along the vehicle front-rear direction so as to penetrate an opening formed in the central portion of the bracket 18. ing. The nut 20 includes a cylindrical tubular portion 20A, and a protruding portion 20B that protrudes annularly radially outward from an intermediate portion of the cylindrical portion 20A. The protruding portion 20B is located on the vehicle rear side of the bracket 18. It is joined to the wall surface by welding or the like. The cylindrical portion 20A of the nut 20 is formed with a female screw portion 20C as a nut portion to which the male screw portion 30C of the traction hook 30 is screwed, on the vehicle rear side with respect to the position joined to the bracket 18. Further, the cylindrical portion 20 </ b> A of the nut 20 is not formed with a female screw portion on the front side of the vehicle from the position joined to the bracket 18. The nut 20 is formed such that the inner diameter of the cylindrical portion 20A on the front side of the vehicle from the position joined to the bracket 18 is slightly larger than the outer diameter of the small-diameter portion 30B of the traction hook 30, and the nut 20 is pulled by this cylindrical portion 20A. The male screw portion 30C and the small diameter portion 30B of the hook 30 can be inserted. The cylindrical portion 20 </ b> A on the front side of the vehicle with respect to the position joined to the bracket 18 is a guide portion that guides the small-diameter portion 30 </ b> B of the traction hook 30 when the traction hook 30 is attached.

  The bracket 18 inserts the nut 20 into the opening 16 of the plate member 14, and the plate member 14 and the bumper arm in a state where the bracket 18 is sandwiched between the joint portion 14 </ b> A of the plate member 14 and the joint portion 26 </ b> C of the bumper arm 26. 26 and tightened together. Specifically, the vehicle rear side wall surface of the bracket 18 and the vehicle front side wall surface of the joint portion 14 </ b> A of the plate member 14 are arranged in a surface contact state, and the joint portion 26 </ b> C of the vehicle front side wall surface of the bracket 18 and the bumper arm 26. The plate member 14, the bracket 18, and the bumper arm 26 are fastened and fixed by a plurality of bolts and nuts in this state. In this embodiment, the bolt 34 is penetrated from the joint portion 26C side into the bolt through holes 14E and 26D provided on the vehicle lower side of the joint portion 26C of the plate member 14 and the bumper arm 26, and the nut 36 from the plate member 14 side. Are screwed together (see FIG. 1). Further, the bolt 38 is penetrated from the joint portion 26C side into the bolt through holes 14F and 26E provided on the inner side in the vehicle width direction of the joint portion 26C of the plate member 14 and the bumper arm 26, and the nut 40 is screwed from the plate member 14 side. The bolt 42 is penetrated from the side of the plate member 14 into the bolt through holes 14G, 18A, 26F provided on the outer side in the vehicle width direction of the joint portion 26C of the plate member 14, the bracket 18, and the bumper arm 26. A nut 44 is screwed from the 26C side (see FIG. 2). A plurality of bolts and nuts that fasten the bracket 18 to the plate member 14 and the joint portion 26C of the bumper arm 26 are provided, but the other bolts and nuts are not shown. In the present embodiment, the peripheral portion of the nut 20 of the plate-like bracket 18 is a load receiving portion that is held in a state of being sandwiched between the joint portion 14A of the plate member 14 and the joint portion 26C of the bumper arm 26. In addition, the portion provided with the bolt through hole 18A and the like around the load receiving portion of the bracket 18 is an attachment portion.

  Then, the male screw portion 30C of the tow hook 30 is passed through the through holes 28A and 28B of the bumper reinforcement 24 and the through hole 28D of the bumper arm 26 from the front side of the vehicle, and is passed through the cylindrical portion 20A of the nut 20 and the female screw of the nut 20 Screwed into the portion 20C. As a result, the tow hook 30 is disposed along the vehicle front-rear direction and attached to the nut 20 fixed to the bracket 18. The female screw portion 20C of the nut 20 is a joint portion of the bumper arm 26 in a state where the bracket 18 is sandwiched between the joint portion 14A of the plate member 14 and the joint portion 26C of the bumper arm 26 and is fastened together with the plate member 14 and the bumper arm 26. It is arranged closer to the front side member 12 than 26C. In other words, the female screw portion 20 </ b> C of the nut 20 is provided on the opposite side of the bumper reinforcement 24 across the joint portion 26 </ b> C of the bumper arm 26 joined to the bracket 18.

  Note that the nut 20 may have a long cylindrical portion 20A on the front side of the vehicle as a guide when the male screw portion 30C of the traction hook 30 is screwed together, or may have a minimum necessary length due to weight reduction or the like. Also good.

  The inner diameters of the through holes 28 </ b> A and 28 </ b> B of the bumper reinforcement 24 and the through holes 28 </ b> D of the bumper arm 26 are slightly larger than the outer diameter of the traction hook 30. In other words, the through holes 28 </ b> A and 28 </ b> B of the bumper reinforcement 24 and the through holes 28 </ b> D of the bumper arm 26 are formed in such a size that the deformed traction hook 30 can be contacted by a load acting in a direction crossing the axial direction of the traction hook 30. Has been.

  A plurality of circular openings 46A, 46B, and 46C are formed in the front wall 24A and the rear wall 24B of the bumper reinforcement 24 and the vertical wall portion 26B of the bumper arm 26, respectively, along the vehicle front-rear direction.

  The tow hook 30 can be used as a tie-down hook for restraining the vehicle 10 when the vehicle 10 is transported by a ship or the like, in addition to being used for towing and towing other vehicles. When the tow hook 30 is used, an input in the push / pull direction or an input in the vehicle width direction or the vehicle lower side direction when transporting by ship or the like enters the tow hook 30.

  Next, the operation and effect of this embodiment will be described.

  The bracket 18 to which the nut 20 is fixed is fastened and fixed to the plate member 14 joined to the front end portion of the front side member 12, and the load from the traction hook 30 is not transmitted via the bumper arm 26 and the bumper reinforcement 24. It can be directly transmitted to the front side member 12 on the vehicle body side. At this time, since the nut 20 is not directly fixed to the front side member 12 or the plate member 14 on the vehicle body side but is fixed to the bracket 18, the load can be distributed and transmitted through the bracket 18. Hereinafter, the transmission path of the force at the time of input by using the tow hook 30 will be described for each case.

  (1) When an input on the pulling side is input from the pulling hook 30, that is, when an input as indicated by an arrow A in FIG. 4 is input, the input from the pulling hook 30 is input to the bracket 18 via the nut 20. The This load is transmitted to the front side member 12 side through the fastening portion between the bracket 18 and the plate member 14. At this time, since the joint portion 26C between the bracket 18 and the bumper arm 26 is also arranged in a surface contact state, the deformation of the bracket 18 can be suppressed. Further, the plate member 14 is fastened to the plate member 14 on the opposite side in the vehicle width direction through the bumper arm 26 and the bumper reinforcement 24 via a fastening portion that fastens and fixes the joint portion 14A of the plate member 14, the bracket 18 and the joint portion 26C of the bumper arm 26. The load can also be transmitted to the portion (attachment portion to the front side member 12). For this reason, deformation of the bracket 18 can be suppressed while suppressing an increase in the weight of the bracket 18.

  (2) When an input on the compression side is input from the tow hook 30, that is, when an input as indicated by an arrow B in FIG. 4 is input, the input from the tow hook 30 is input to the bracket 18 through the nut 20. Is done. This load is transmitted to the front side member 12 side through the joint surface between the bracket 18 and the joint portion 14A of the plate member 14. At this time, since the bracket 18 and the joint portion 14A of the plate member 14 are arranged in a surface contact state, deformation of the bracket 18 can be suppressed.

  (3) When a lateral input (direction parallel to the vehicle width direction) is input from the tow hook 30, that is, when an input as indicated by an arrow C in FIG. 4 is input, the front end portion of the tow hook 30 (the front end of the vehicle) Part) bends and deforms in the load input direction in the vehicle width direction, and the input from the tow hook 30 is input to the bracket 18 via the nut 20, and the load is transmitted in the same manner as in the above (1) and (2). The At that time, since the through holes 28A, 28B, 28C such as the bumper reinforcement 24 through which the tow hook 30 is penetrated are set to the minimum necessary diameter, the deformed tow hook 30 has the through holes 28A, 28B, 28C. It is possible to reduce the amount of deformation of the tip of the tow hook 30 and to distribute the load via the bumper reinforcement 24 when hitting at least one edge (hole edge). That is, when the deformed traction hook 30 hits the edge of the through holes 28A, 28B, 28C, the fastening portion (front side) with the plate member 14 on the opposite side in the vehicle width direction via the bumper arm 26 and the bumper reinforcement 24. The load is also distributed to the attachment portion to the member 12, and the burden can be reduced.

  (4) When a vehicle downward input is input from the tow hook 30, that is, when an input as indicated by an arrow D in FIG. 5 is input, the tip end portion (vehicle front end portion) of the tow hook 30 bends to the vehicle lower side. In addition to the deformation, the input from the tow hook 30 is input to the bracket 18 via the nut 20 and the load is transmitted in the same way as the above (3). At that time, since the through holes 28A, 28B, 28C such as the bumper reinforcement 24 through which the tow hook 30 is penetrated are set to the minimum necessary diameter, the deformed tow hook 30 has the through holes 28A, 28B, 28C. It is possible to reduce the amount of deformation of the tip of the tow hook 30 and to distribute the load via the bumper reinforcement 24 when hitting at least one edge (hole edge).

  As described above, in the tow hook mounting structure of the present embodiment, a load can be effectively transmitted in response to input in each direction from the tow hook 30. Further, since the bracket 18 to which the traction hook 30 is screwed is sandwiched between the joint portion 14A of the plate member 14 and the joint portion 26C of the bumper arm 26, the plate member 14 and the bumper arm 26 are fastened together. Dedicated fastening parts and reinforcing parts for fixing are not necessary, and the cost can be reduced.

  The female screw portion 20C of the nut 20 is joined to the bumper arm 26 in a state where the bracket 18 is sandwiched between the joint portion 14A of the plate member 14 and the joint portion 26C of the bumper arm 26 and fastened together with the plate member 14 and the bumper arm 26. Since it is arranged closer to the front side member 12 than the portion 26C, it is possible to suppress the deformation of the bumper reinforcement 24 and the bumper arm 26 when the vehicle 10 collides.

  Furthermore, the tow hook mounting structure of the present embodiment distributes and transmits the load when the vehicle body side mounting member and the vehicle body frame member of the vehicle 10 are made of a material with low material strength such as an aluminum alloy or a composite material. Therefore, the burden on the vehicle body side mounting member and the vehicle body skeleton member can be reduced.

[Second Embodiment]
Hereinafter, the second embodiment of the tow hook mounting structure according to the present invention will be described with reference to FIG. In addition, about the same component as 1st Embodiment mentioned above, the same number is attached | subjected and the description is abbreviate | omitted.

  As shown in FIG. 6, a plate member 56 is joined to the front end portion of the front side member 12 at the front portion of the vehicle 50 by welding or the like, and the joint portion 26 </ b> C of the bumper arm 26 and the joint portion of the plate member 56. A box-shaped bracket 52 is disposed between the bracket 56A. The front wall 52A of the bracket 52 is disposed in surface contact with the joint portion 26C of the bumper arm 26, and the rear wall 52B of the bracket 52 is disposed in surface contact with the joint portion 56A of the plate member 56. The plate member 56 and the bumper arm 26 are fastened together by a plurality of bolts and nuts (not shown). In addition, the dashed-dotted line P shown by FIG. 6 represents the bolt fastening line. The bracket 52 is provided with a nut 54 that passes through the front wall 52A and the rear wall 52B. The nut 54 and the bracket 52 are integrally formed by casting, forging or the like. A through hole 58 is formed in the joint portion 26C of the bumper arm 26 at a position where the nut 54 is provided, and a through hole 60 is formed in the joint portion 56A of the plate member 56 at a position where the nut 54 is provided. ing.

  The male threaded portion 30C of the tow hook 30 is passed through the through holes 28A and 28B of the bumper reinforcement 24 from the front side of the vehicle, and is also passed through the through holes 28D of the bumper arm 26 and screwed into the nut 54, whereby the tow hook 30 is bracketed. 52 is attached.

  The nut 54 is sandwiched between the joint portion 26C of the bumper arm 26 and the joint portion 56A of the plate member 56 so that the nut 52 is fastened together with the joint portion 26C of the bumper arm 26 and the joint portion 56A of the plate member 56. The bumper arm 26 is disposed closer to the plate member 56 side of the vehicle body than the joint portion 26C. That is, in this configuration, the guide of the pulling hook 30 that protrudes from the nut 54 toward the bumper arm 26 is not provided.

  In such a tow hook mounting structure, the bracket 52 integrally formed with the nut 54 is fastened and fixed to the plate member 56 joined to the front end portion of the front side member 12, and the load from the tow hook 30 is applied to the bumper arm 26. And it can be transmitted directly to the plate member 56 and the front side member 12 on the vehicle body side, not via the bumper reinforcement 24. At this time, the nut 20 is not directly fixed to the front side member 12 or the plate member 56 on the vehicle body side, and the nut 20 is fixed to the bracket 52, so that the load can be distributed and transmitted through the bracket 52. .

  The nut 54 is a state in which the bracket 52 is sandwiched between the joint portion 26C of the bumper arm 26 and the joint portion 56A of the plate member 56 and is fastened together with the joint portion 26C of the bumper arm 26 and the joint portion 56A of the plate member 56. Since the bumper arm 26 is disposed closer to the plate member 56 on the vehicle body side than the joint portion 26C of the bumper arm 26, it is possible to prevent the deformation of the bumper reinforcement 24 and the bumper arm 26 during the collision of the vehicle 50.

[Supplementary explanation of the embodiment]
In the first embodiment and the second embodiment described above, the bumper reinforcement 24 is formed in a curved shape so that the central portion in the vehicle width direction protrudes toward the vehicle front side, but the bumper reinforcement 24 is formed in a linear shape. May be. When the bumper reinforcement 24 is linear, the bumper arm 26 is not necessary. In this case, both end portions in the vehicle width direction of the bumper reinforcement 24 correspond to the bumper side mounting portions of the present invention.

  Moreover, you may apply this invention with respect to the front side member and bumper reinforcement comprised by press-molding a steel plate.

  In the first embodiment and the second embodiment described above, the brackets 18 and 52 to which the nuts 20 and 54 are fixed are fastened to the plate members 14 and 56 that are fixed to the front end portion of the front side member 12. Instead, it may be fastened and fixed to another vehicle body side mounting member.

  In the first embodiment described above, the cylindrical portion 20A of the nut 20 fixed to the bracket 18 is arranged along the vehicle front-rear direction, and the female screw portion 20C of the nut 20 is fastened and fixed to the bracket 18. However, the present invention is not limited to this, and the length of the cylindrical portion 20A (guide of the tow hook 30) on the vehicle front side relative to the bracket 18 is shortened, or The cylindrical portion 20A (the guide portion of the tow hook 30) on the front side of the vehicle with respect to the bracket 18 may not be provided. The length of the cylindrical portion 20A on the front side of the vehicle relative to the bracket 18 or the case where the cylindrical portion 20A on the front side of the vehicle relative to the bracket 18 is not provided is greater than that of the bumper reinforcement 24 and the bumper arm 26 when the vehicle collides. It is difficult to prevent deformation.

  In the first embodiment and the second embodiment described above, the traction hook 30 is attached to the front end portion of the vehicle 10, but the present invention is not limited to this, and also when the traction hook 30 is attached to the rear end portion of the vehicle 10. The present invention is applicable.

It is a longitudinal section showing the whole pull hook attachment structure concerning a 1st embodiment. It is a cross-sectional view which shows the whole structure of the pulling hook attachment structure which concerns on 1st Embodiment. It is a disassembled perspective view which shows the tow hook attachment structure which concerns on 1st Embodiment. It is a cross-sectional view showing the direction of input entering from the tow hook. It is a longitudinal cross-sectional view which shows the direction of the input which enters from a tow hook. It is a cross-sectional view which shows the whole structure of the tow hook attachment structure which concerns on 2nd Embodiment.

Explanation of symbols

10 Vehicle (front of vehicle body)
12 Front side member (body frame member)
12A Front end (end)
14 Plate member (vehicle body side mounting member)
14A Joint (Body side joint surface)
18 Bracket (Towing hook mounting member)
20 Nut (Nut part)
20C Female thread part (nut part)
24 Bumper reinforcement (bumper material)
26 Bumper arm (bumper side mounting part)
26C joint (bumper side joint surface)
28A Through-hole 28C Through-hole 28D Through-hole 30 Towing hook 30C Male thread part (Male thread)
50 vehicle (front of vehicle body)
52 Bracket (Towing hook mounting member)
54 Nut (Nut)
56 Plate member (vehicle body side mounting member)
56A Joint (Body side joint surface)

Claims (4)

A vehicle body side mounting member provided at the ends of a pair of left and right vehicle body skeleton members arranged along the vehicle longitudinal direction on both sides in the vehicle width direction at the vehicle body front part or vehicle body rear part, and having a vehicle body side joint surface;
A bumper side mounting portion provided on a bumper member spanned between the ends of the pair of left and right vehicle body skeleton members, and provided with a bumper side joint surface serving as a fixing portion to the vehicle body side joint surface;
A tow hook inserted from the outside of the vehicle body into a through hole formed coaxially in the bumper member and the bumper side mounting portion, and having an external thread formed on the outer peripheral surface of the insertion side end;
An attachment portion that is fastened together with the vehicle body side attachment member and the bumper side attachment portion in a state of being sandwiched between the vehicle body side joint surface and the bumper side joint surface, and the through hole as viewed in the vehicle front-rear direction. A nut portion that is provided at an overlapping position and that is screwed with a male screw of the traction hook, and constitutes a peripheral portion of the nut portion and is held in a state of being sandwiched between the vehicle body side mounting member and the bumper side mounting portion. A tow hook mounting member configured to include a load receiving portion,
A tow hook mounting structure characterized by comprising:   The tow hook mounting structure according to claim 1, wherein the nut portion is disposed closer to the vehicle body side mounting member than the bumper side joining surface in the mounted state of the tow hook mounting member.   The tow hook attachment according to claim 1 or 2, wherein the through hole is sized so that the tow hook can be contacted by a load acting in a direction crossing an axial direction of the tow hook. Construction. The bumper reinforcement is disposed along the vehicle width direction of the bumper member,
The tow hook mounting structure according to any one of claims 1 to 3, wherein the bumper side mounting portions are bumper arms provided at both ends of the bumper reinforcement in the vehicle width direction.

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