JPH11334329A - Installing structure of traction hook for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an installing structure of traction hook which can draw a large mass of vehicle, without applying the reinforcement to a body side, or without increasing the plate thickness of a structural member. SOLUTION: An outer end part of a front side member 30 is a welded member extension 31. Two installing bolts 20 are fixed by the welding or the like to the member extension 31 by projecting male screws 22 to the front side. A bumper reinforcement 40 is fixed by the installing bolts 20 and supporting nuts 25. A traction hook 10 is composed of an about U-shape hook main body 11 and at least two fastening members 12, and the fastening members 12 are rotatable around the axis to the hook main body 11. Female screws 12a are formed at the tips of the fastening members 12, and they are screwed to the male screws 22 of the installing bolts 20 when the traction hook 10 is installed to the body side. Since the operating load is divided to two fastening members 12 in the traction time, and the load is reduced to a half weight, it is not necessary to reinforce the installing part, or to increase the plate thickness.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mounting structure in which a towing hook used for towing a vehicle or the like is mounted on a structural member provided on a vehicle body of the vehicle.

[0002]

2. Description of the Related Art A towing hook is usually fixed to a front end or a rear end of a vehicle so that the vehicle can be towed. However, in the case of such a tow hook, it is necessary to form the tow hook in a curved shape in order to avoid interference with a bumper provided at a front end or a rear end of the vehicle. Since the load is applied, the strength becomes difficult, so it has to be reinforced. Therefore, extra reinforcement is provided by installing a towing hook at the outer end of a structural member (also referred to as a side member or a frame) extending in the front-rear direction of the vehicle on a straight extension line in the front-rear direction of the structural member. An unnecessary structure for mounting the towing hook is disclosed in Japanese Utility Model Laid-Open No. 4-39911. This will be described below.

FIG. 6 shows a traction hook 11.
0 is attached to the rear end of the vehicle. In a pair of right and left rear frames (frames arranged in the rear portion) 130 on the right and left sides of the vehicle, inside a rear end plate 131, a support nut is attached to a bracket 132 fixed to a rear frame plate 133. 125 are welded. An attachment member 120 having an external thread portion 124 at one end is screwed into the support nut 125. Mounting member 12
A female screw part 122 is formed on the other end side of 0 at the center part in the axial direction. The bumper 150 includes a bumper cover 151 and a buffer 152. A part of the bumper cover 151 and the buffer 152 is provided with a hole on the extension of the rear frame 130 in the axial direction, and the towing hook 110 is penetrated. Can be inserted. The tip of the towing hook 110 forms a male thread 112. The other end of the towing hook 110 forms a hook portion 111.

The towing hook 110 is inserted from a hook insertion hole 151a provided in the bumper cover 151 only when necessary, and the external thread 112 is screwed into the female thread 122 of the mounting member 120. Accordingly, the towing hook 110 is fixed to the rear frame 130 via the mounting member 120, the support nut 125, and the bracket 132. As described above, since the towing hook 110 is disposed on the extension of the rear frame 130 in the axial direction, the towing hook 110 is hardly subjected to a bending load during towing, so that it is not necessary to use a reinforced structure. Further, the towing hook 110 may be attached only when necessary.

[0005]

According to such a conventional structure for mounting a tow hook for a vehicle, the tow hook 1 is provided.
It is necessary to provide a dedicated mounting member 120, a support nut 125, and a bracket 132 for mounting 10.
When the mass of the vehicle is large, the bracket 132 and the rear frame 1 are required to withstand the load applied during towing.
Since it is necessary to reinforce the end plate 131, which is the endmost portion of the end plate 30, by making it thicker than before, there is a problem that a lightweight structure is not obtained.

Therefore, in order to solve such a problem,
SUMMARY OF THE INVENTION It is an object of the present invention to provide a lightweight mounting structure for a vehicle tow hook that does not require thickening or reinforcement of a member to which the tow hook is mounted even if the mass of the vehicle is large.

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the invention according to the first aspect is directed to a traction system comprising a substantially U-shaped hook body and a fastening member fitted to the hook body. A hooking structure for a towing hook for a vehicle, wherein a hook is detachably attached to at least two fastening members fixed to outer ends of structural members of a vehicle body by the fastening member.

According to a second aspect of the present invention, in the mounting structure for a towing hook for a vehicle according to the first aspect, there is provided a bumper reinforcement having a hollow closed cross-section adjacent to the outer end of the structural member. A mounting structure for a towing hook for a vehicle, wherein the member to be fastened is disposed inside.

According to a third aspect of the present invention, in the mounting structure for a towing hook for a vehicle according to the first aspect, the fastening member of the towing hook is rotatably fitted to the hook body. It is a mounting structure of a towing hook for a vehicle, which is a feature.

According to a fourth aspect of the present invention, in the vehicle tow hook mounting structure according to the second aspect, the member to be fastened is a mounting bolt for fixing a bumper reinforcement to the structural member. 1 is a mounting structure of a towing hook for a vehicle.

[0011]

In attaching the tow hook of the present invention to a vehicle, first, the fastening member fitted to the hook main body of the tow hook is attached to the outer end of the structural member. Fastened to the fixed member to be fastened. At this time, since there are at least two members to be fastened, at the time of towing, at least two of the towing loads are shared, so that at least a half load is applied to the outer end of the structural member. Therefore, even in a vehicle having a large mass, there is an excellent effect that the structural member to which the member to be fastened is not required to specially reinforce or increase the plate thickness, and the weight can be reduced.

[0012] In the mounting structure for a towing hook for a vehicle according to the present invention, the member to be fastened is an interior of the bumper reinforcement having a hollow closed cross-section adjacent to an outer end of the structural member. Since the bumper reinforcement has a space that collapses while absorbing energy when the vehicle collides with another vehicle or collides with an obstacle, the buffer function of the bumper is reduced. It has an excellent effect of being kept.

According to a third aspect of the present invention, the fastening member of the towing hook for a vehicle is rotatably fitted to the hook body, so that the outer end of the structural member is used to attach the towing hook to the vehicle. When fastened to the member to be fastened to the part, the hook member can be fastened to the member to be fastened while rotating the fastening member while the substantially U-shaped hook body is stopped. Has the effect.

In the mounting structure for a towing hook for a vehicle according to the present invention, the member to be fastened is a mounting bolt for fixing a bumper reinforcement to the structural member. Since it is used not only for mounting but also for mounting bumper reinforcements, it has an excellent effect of being lightweight and inexpensive.

[0015]

FIG. 4 shows a case in which a towing hook for a vehicle according to the present invention is attached to the front of a vehicle 1. FIG. In this case, the towing hook 10 is located on the front right side of the vehicle 1. The towing hook 10 and its vicinity are substantially perpendicular to the front and rear direction of the vehicle 1 along the line II in the figure. 1 is shown in FIG. FIG. 3 is an exploded perspective view of the towing hook 10 and members related thereto.

As shown in FIG. 3, the structural member 30 (hereinafter, referred to as the front side member 30 in the present embodiment, which is a front side member) is formed by bending a steel plate and having a substantially U-shaped cross section in the front-rear direction. The inner member 33 and the outer member 32 are welded to each other so as to extend in the front-rear direction with a closed cross section having a substantially rectangular shape. The outer end of the front side member 30 has a member extension 31. It is constituted by covering like a lid. And this front side member 30
Is fixed to an apron panel not shown. The member extension 31 has a rectangular flat plate at the center, and the plate portion of the bent portion of the end overlaps the tip of the inner member 33 so that the inner member 3 is welded at the welded portion 34.
It is fixed to 3. A plurality of circular mounting holes 35 are formed in the substantially vertical plane occupying most of the member extension 31.

Next, in FIG. 1, two fastening members 20 (in FIG. 1, the fastening members are bolts 20) in a substantially vertical direction in the plurality of mounting holes 35. Therefore, it is referred to as a mounting bolt 20 hereinafter). Here, the number of the mounting bolts 20 may be more than two. The mounting bolt head 21 is positioned inside the member extension 31 (to the left in FIG. 1), and the male screw portion 22 is extended outward (to the right in FIG. 1). The mounting bolt head 21 is a member extension 3
Fixed to 1. Therefore, member extension 3
At least one male screw 2 of the mounting bolt 20
2 are protruded, so that the mounting bolt 20 is a stud bolt.

The bumper 50 includes a bumper cover 51, a bumper reinforcement 40, and a buffer 52. When the vehicle 1 collides with another vehicle from the front or hits an obstacle, the front side member 30 and the body outer portion are provided so as to absorb the energy of impact so that they are not scratched or have only slight scratches. This is the bumper reinforcement 40. This is a member having a closed cross-section inside the bumper cover 51 and the shock absorber 52 and generally extending in the left-right direction of the vehicle 1 and having a space that can be crushed in the front-rear direction. Have been. The bumper reinforcement 40 will be described in more detail. The bumper reinforcement 40 has a rectangular closed cross section as shown in the cross section of FIG. 1, and a reinforcing plate 43 is provided at the center to form a sun-shape. The rear end plate 41 in contact with the member extension 31 has a circular mounting hole 45, and the front end plate 42 located at the front end has a towing hook hole 46.

Since the mounting holes 45 are formed so as to correspond to the mounting holes 35 of the member extension 31, the two mounting bolts 20 serving as the aforementioned stud bolts are formed.
The bumper reinforcement 40 is fixed to the front side member 30 by aligning the mounting hole 45 with the male screw part 22 of the above and screwing the support nut 25 into the male screw part 22. In addition to this mounting, the bumper reinforcement 4 is provided by using another bolt except in the section shown in FIG.
0 may be fixed to the front side member 30. The position of the towing hook hole 46 is concentric with the mounting bolt 20 in the axial direction. The bumper cover 51 also has 2
Hook insertion hole 5 on the axial extension of two mounting bolts 20
1a is provided.

The towing hook 10 comprises a hook body 11 and a fastening member 12. The hook body 11 is formed by shaping a bar-shaped steel material into a substantially U-shape, and a bar-shaped steel material having a circular or polygonal cross section is generally used. At this time, the hook portion is not necessarily limited to a substantially U-shape, but may be of any other shape as long as the two fastening members 12 are rotatably fitted and a pulling wire or the like can be hooked. . However, in the present embodiment, description will be made with a substantially U-shape, so the expression “U-shape” is used in the above and below. Further, the number of the fastening members 12 may be more than two. In the embodiment shown in FIG. 1, the hook main body 11 is substantially U-shaped as described above, and the hook arms 11a serving as the two arms are parallel to each other and have the same arm length. Hook tip 1 at the tip of hook arm 11a
1b is formed thicker than the general part. The fastening member 12 wraps around a part of the base connected to the hook tip 11b and the tip of the hook arm 11a.

The fastening member 12 has a straight rod shape, and has a hollow at one end at the center of the shaft, and a female screw portion 12a at the inner periphery of the hollow. At the other end, the hook tip 11b and the hook arm 11a described above are used.
Is formed from the outside, and the hook fitting cavity 12b is formed with a clearance enough to allow the fastening member 12 to freely rotate in the axial direction with respect to the hook body 11. As described above, the outer diameter of the hook tip 11b is
Since the hook tip 11b and a part of the hook arm 11a are covered with a small clearance in the hook fitting cavity 12b, the hook arm 11a is When pulled in the axial direction, the load is
It is transmitted to 2 as it is. Even if the hook main body 11 is fixed, the fastening member 12 can rotate around the axis.

The engagement between the hook body 11 and the fastening member 12 is reversed from that described above, with the end on the fastening member 12 side being convex and the end of the hook arm 11a being concave. It may be of a shape which is fitted with unevenness.

When the traction hook 10 having the above structure is not normally used, a hole cover 60 made of rubber or synthetic resin is inserted into the hook insertion hole 51a of the bumper cover 51 as shown in FIG. And cover the hole. When it becomes necessary to attach the towing hook 10 to the vehicle 1, the hole cover 60 is removed and the towing hook 10 is attached.

The method of attaching the towing hook 10 to the vehicle 1 is as follows. First, two fastening members 12 attached to the tip of the towing hook 10 so as to be freely rotatable in the axial direction are provided on the upper and lower sides of the bumper cover 51. Insert into hook insertion hole 51a. Further, the bumper reinforcement 40 is inserted into the bumper reinforcement 40 through the towing hook holes 46 also provided on the upper and lower sides. The bumper reinforcement 40 is fixed to the front side member 30, and the male screw portion 22 of the mounting bolt 20 is provided at a point on the axis connecting the hook insertion hole 51 a and the tow hook hole 46.
Projecting toward the towing hook 10, the female screw portion 12 a of the fastening member 12 is screwed into the male screw portion 22. If the fastening member 12 is rotated and firmly fixed to the mounting bolt 20 until the tip of the fastening member 12 contacts the end face of the support nut 25, the installation of the towing hook 10 is completed,
As shown in FIG. 1, the hook body 11 of the towing hook 10 projects the substantially U-shaped hook curved portion 11c toward the front of the vehicle 1.

Then, the towing wire is attached to the towing hook 10 through a towing wire (not shown) in a space surrounded by a hook curved portion 11c connecting the two hook arms 11a and the hook arm 11a, and pulled forward of the vehicle, whereby the towing is performed. The load is applied from the hook body 11 to the mounting bolt 20 via the fastening member 12, and further from the mounting bolt 20 to the front side member 30. Since the vehicle body of the vehicle 1 is fixed to the front side member 30, the vehicle 1 can be pulled by pulling the wire.

The effect of this embodiment will be described. First, at the time of towing, the load is applied to the towing hook 10 via the two fastening members 12 attached to the tips of the two hook arms 11a, so that the towing hook 10 is applied with only one shaft as shown in the prior art. Therefore, the load of the load is almost halved, and the load acting on the member extension 31 (corresponding to the end plate 131 described in the related art) is almost halved.
It is possible to apply the towing hook 10 to a vehicle having a large vehicle mass without reinforcing or increasing the plate thickness. For example, if the vehicle 1 has a mass of 2000 kg and the tow hook 110 of FIG. 6 shown in the related art instead of the tow hook 10 of this embodiment, the thickness of the member extension in the mounting structure is 5 mm is required, but the towing hook 1 of the present embodiment is required.
It has been calculated that if it is 0, it will be 2.5 mm. Therefore, there is no need to specially reinforce the mounting side of the vehicle 1 or increase the plate thickness, so that there is an excellent effect that it is lightweight and inexpensive.

When the bumper reinforcement 40 is crushed in the front-rear direction of the vehicle, the vehicle is running or stopped, and the tow hook 10 is not attached to the vehicle 1 (see FIG. 1). 2), the bumper reinforcement 40 is a closed section having a hollow, so that a sufficient crushable area is secured until the front end plate 42 comes into contact with the male screw portion 22 at the tip of the mounting bolt 20. So (see Figure 2)
The impact load is less likely to affect the front side member 30. Accordingly, even when the vehicle 1 collides with another vehicle or collides with an obstacle, there is an excellent effect that only a small measure of repairing or replacing the bumper reinforcement 40 with a new one is sufficient.

When the towing hook 10 is attached to the vehicle 1, the fastening member 12 rotatably fitted to the hook body 11 is rotated without moving the hook body 11, so that the hook bolt 20 can be easily attached to the mounting bolt 20. It has an excellent effect that it can be attached.

The mounting bolt 20 has the function of fixing the bumper reinforcement 40 to the front side member 30 via the member extension 31, and also has the function of mounting the towing hook 10 as described above. Therefore, there is an excellent effect that the weight can be reduced and the cost can be reduced.

In the above description, as shown in FIG. 4, the case where the towing hook 10 is attached to the front right side of the vehicle 1 is not limited to this case. It may be applied to the left side. Further, as shown in FIG. 5, the present invention may be applied to the left rear portion of the vehicle, or may be further applied to the right rear portion of the vehicle. Further, the present invention may be applied to both front and rear portions of the vehicle. Hole cover 6
0 is not provided with a hook insertion hole 51a in the bumper 51 at each of two substantially U-shaped tip portions, and one hook insertion hole 251a is provided.
It is good. In this case, only one hole cover 60 is required.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a state where a tow hook 10 according to an embodiment of the present invention is attached to a vehicle body, and is a cross-sectional view taken along a line II passing through the tow hook 10 in FIG.

FIG. 2 is a cross-sectional view showing a state where a towing hook 10 is removed in FIG. 1, and is a cross-sectional view taken along a line II of FIG. 4;

FIG. 3 is an exploded perspective view showing the towing hook 10, the front side member 30, a member extension 31 which is an outer end of the front side member 30, and the like according to the embodiment of the present invention.

FIG. 4 is a perspective view showing that the towing hook 10 according to the embodiment of the present invention is attached to the front right side of the vehicle.

FIG. 5 is a perspective view showing that the towing hook 10 according to the embodiment of the present invention is attached to the rear left side of the vehicle.

FIG. 6 is a cross-sectional view showing a state in which a conventional towing hook 110 is attached to a vehicle body.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Vehicle 10, 110 ... Towing hook 11 ... Hook main body part 11a ... Hook arm part 11b ... Hook tip part 11c ... Hook curve part 12 ... Fastening member 12a ...・ Female thread part 12b ・ ・ ・ Hook fitting hollow part 20 ・ ・ ・ Fixed member (Mounting bolt) 21 ・ ・ ・ Mounting bolt head 22 ・ ・ ・ Male thread part 25,125 ・ ・ ・ Support nut 30 ・ ・ ・ Structure Member (front side member) 31 ・ ・ ・ Member extension 32 ・ ・ ・ Outer member 33 ・ ・ ・ Inner member 35, 45 ・ ・ ・ Mounting hole 40 ・ ・ ・ Bumper reinforcement 46 ・ ・ ・ Towing hook hole 50 、 150: bumper 51, 151: bumper cover 51a, 151a: hook insertion hole 52, 152: buffer 111: hook 112: male Screw part 120 ・ ・ ・ Mounting member 130 ・ ・ ・ Rear frame

Claims (4)

[Claims] A towing hook comprising a substantially U-shaped hook body and a fastening member fitted to the hook body is attached to at least two members to be fastened to outer ends of structural members of the vehicle body. An installation structure for a towing hook for a vehicle, wherein the installation member is detachably attached by the fastening member. 2. The mounting structure of a towing hook for a vehicle according to claim 1, wherein the member to be fastened is inside a bumper reinforcement adjacent to the outer end of the structural member and having a hollow closed section. A mounting structure for a towing hook for a vehicle, which is provided. 3. The towing hook for a vehicle according to claim 1, wherein said fastening member of said towing hook is rotatably fitted to said hook body. Mounting structure. 4. The mounting structure for a towing hook for a vehicle according to claim 2, wherein the member to be fastened is a mounting bolt for fixing a bumper reinforcement to the structural member. Construction.